Explosion-proof direct-current motor

Abstract

The utility model discloses an explosion-proof DC motor which is provided with a motor housing convenient for positioning and assembling, and the outer surface of the motor housing is provided with a junction box. Comprising a sealing shell, the sealing shell is installed on the right side of the outer surface of the fixing frame, the outer surface of the sealing shell is connected with a rear end cover, the rear end cover is provided with an air positioning detection mechanism, and the air positioning detection mechanism can position and assemble an air detection element assembled on the rear end cover. An air positioning detection mechanism is arranged, an assembled positioning assembly can support an air detection element and is matched with a clamping block arranged on the positioning assembly, clamping positioning is effectively formed, the air detection element is prevented from falling off, disassembly and replacement are convenient, and the air detection element is clamped to the rear side of a sealing shell through a rear end limiting part; and flammable and explosive gas in the gas can be effectively detected, so that sealing treatment is formed on the cavity of the motor shell in cooperation with a sealing plate in the rotary sealing mechanism.

Description

Technical Field

[0001] The utility model relates to the technical field of DC motors, in particular to an explosion-proof DC motor. Background Art

[0002] A DC motor is an electric motor that can convert electrical energy into mechanical energy. The internal winding rotor and magnetic core cooperate to effectively control the rotation of the shaft on the rotor, thereby driving the corresponding components to work. It is also used in conjunction with the sealing protection of the junction box to prevent damage to the motor when used in environments prone to combustion and explosion. However, there are still some problems with the use of existing explosion-proof DC motors.

[0003] In the prior art, the authorization publication (announcement) number: CN214900463U states that “an explosion-proof DC motor” includes a base and a housing, and also includes a fixing structure capable of preventing loosening, an extrusion structure capable of facilitating lubrication, and a disassembly structure capable of facilitating maintenance. The top of the base is provided with a housing, and one end of the housing is provided with a front section housing, the inner wall of the housing is provided with four stators at equal angles, and two brushes are provided inside the housing, the extrusion structure is provided inside the housing, the end of the housing away from the front section housing is provided with a rear end housing, and the end of the rear end housing away from the housing is provided with four bolts, one end of the bolts passes through the rear end housing and the housing in sequence, and the end of the rear end housing close to the housing is provided with a rotating shaft through a bearing;

[0004] During the operation of the above-mentioned device, the threaded rod can be driven to rotate by rotating the rotating knob, thereby changing the state of the threaded block. However, when in use, only the protection of the junction box is used, which easily leads to limitations in protection. In addition, the contact between the brush and the rotor used in the motor is prone to sparks after gas infiltration, resulting in explosion and damage to the motor. Utility Model Content

[0005] The purpose of the utility model is to provide an explosion-proof DC motor to solve the problem proposed in the above-mentioned background technology that when in use, only the protection of the junction box is easily limited, and the contact between the brush and the rotor used in the motor is also easy to generate sparks after gas infiltration, thereby causing combustion and explosion, causing damage to the motor.

[0006] To achieve the above object, the utility model provides the following technical solution: an explosion-proof DC motor, provided with a motor housing that is convenient for positioning and assembly, a junction box is installed on the outer surface of the motor housing, and a fixing frame is installed on the outer surface of the motor housing;

[0007] It comprises: a sealing shell, which is installed on the right side of the outer surface of the fixing frame, and the outer surface of the sealing shell is connected with a rear end cover, and the rear end cover is provided with an air positioning detection mechanism, and the air positioning detection mechanism can position and assemble the air detection element assembled on the rear end cover;

[0008] The small gear is rotatably connected to the outer surface of the motor housing, and the outer surface of the small gear is meshedly connected with the large gear installed on the rotating member, and a rotating sealing mechanism is arranged on the rotating member, and the rotating sealing mechanism can effectively prevent external flammable gas from entering the brush area.

[0009] Preferably, the fixing frame is arranged at equal angles with respect to the central axis of the outer surface of the sealing shell, and the sealing shell and the rear end cover form a limited nesting structure, and the rear end cover and the rotating shaft form a positioning and rotating structure.

[0010] Through the above structure, it is convenient to form a continuous nested assembly setting during use, and to form a positioning rotation for the rotating shaft, thereby controlling the stability of the rotating shaft during use.

[0011] Preferably, the inner surface of the rear end cover in the air positioning detection mechanism is nested with a rotating shaft, and the inner surface of the rear end cover is symmetrically installed with a positioning assembly, and the inner surface of the positioning assembly is slidably connected with a nesting frame, and the upper surface of the nesting frame is nested with an air detection element;

[0012] The lower surface of the positioning assembly is slidably connected with a card block, the upper surface of the card block is snap-connected with a nesting frame, and the lower surface of the card block is snap-connected with a return spring 1;

[0013] A limit block is installed on the outer surface of the rear end cover, and the outer surface of the limit block is connected to a moving block that is slidably assembled with a sealing shell, and a moving ring is installed on the outer surface of the moving block, and a shift block is installed on the upper surface of the moving ring, and then the outer surface of the moving block is fitted with a return spring 2, and the moving ring, the moving block, the shift block and the return spring 2 are nested in the inner surface of the sealing shell, and a limit pin is installed on the right side of the outer surface of the sealing shell.

[0014] The above structure facilitates the stable positioning and assembly of the air detection element during use, and in combination with the elastic snap-fit ​​structure, when the air detection element is damaged, it can be quickly disassembled and replaced for use, and the stability of the rear end cover assembly can be effectively controlled by the cooperation of the assembled limit block and the moving block.

[0015] Preferably, the positioning component is symmetrically embedded in the middle section of the inner side of the outer surface of the rear end cover, and the positioning component forms a built-in nesting structure with the air detection element through a nesting frame, and the nesting frame and the card block form a limiting card structure, and the card block forms an elastic sliding structure with the positioning component through a reset spring.

[0016] Through the above structure, when in use, the positioning component can be assembled by sliding, and the air detection element can be supported by the nested frame and used at the air inlet of the fan to effectively detect the content of flammable gas in the air. In combination with the use of the elastically adjustable card block installed on the lower side of the positioning component, the stability of the positioning component assembly can be effectively controlled.

[0017] Preferably, the limit block is embedded and installed on the left side of the central axis of the outer surface of the rear end cover, and the rear end cover forms a limit snap-fit ​​structure with the moving block through the limit block, and the moving block, the moving ring and the shift block form an integrated structure, and at the same time, the moving block, the moving ring and the shift block form a nested sliding structure with the sealing shell, and then the moving block forms an elastic extrusion structure with the sealing shell through the second reset spring, and the sealing shell forms a positioning and limiting structure with the rear end cover through the limit pin.

[0018] The above structure facilitates the positioning and assembly of the rear end cover during use, and can be used for stable limiting engagement. When the internal structural components are damaged, they can be easily disassembled and repaired, and the structure has a stable positioning support structure.

[0019] Preferably, a slide groove is provided on the inner surface of the rotating part in the rotary sealing mechanism, and a lever is slidably connected to the inner surface of the slide groove, and a sealing plate is installed on the outer surface of the lever, and a positioning pin is installed on the right edge of the outer surface of the sealing plate, and the positioning pin is nested in the left side of the inner surface of the sealing shell.

[0020] Through the above structure, the lever can be stably assembled during use, and the sealing plate assembled with the lever can be controlled to form a stable angle adjustment.

[0021] Preferably, the slide groove is opened at equal angles with respect to the center axis of the inner surface of the rotating part, and the rotating part and the motor housing form a sealed nested structure, and the large gear and the small gear on the rotating part form a meshing structure, and at the same time, the rotating part and the shift rod form a limited sliding structure through the slide groove, and then the shift rod and the sealing plate and the positioning pin form an integrated structure, and the shift rod and the positioning pin are installed off-axis on the sealing plate, and the sealing plate and the sealing shell form a positioning rotating structure through the positioning pin.

[0022] Through the above structure, the position of the sealing plate can be controlled according to the detection situation of the air detection element during use, and damage to the motor during normal use can be prevented, and the normal heat dissipation of the motor can be avoided.

[0023] Compared with the prior art, the beneficial effects of the utility model are:

[0024] 1. An air positioning detection mechanism is provided, wherein the assembled positioning assembly can support the air detection element, and cooperate with the card block set by the positioning assembly to effectively form a snap-fit ​​positioning, and prevent the air detection element from falling off, and facilitate disassembly and replacement, and through the rear end limit card-fitting on the rear side of the sealing shell, it can effectively detect flammable and explosive gases in the gas, thereby cooperating with the sealing plate in the rotating sealing mechanism to form a sealing treatment for the motor housing cavity;

[0025] Furthermore, the rear end cover is effectively engaged and positioned by the cooperation of the installed limit block and the moving block, and the moving block is installed with the cooperation of the moving ring, the shift block and the return spring 2, which effectively and synchronously controls multiple groups of limit blocks to form synchronous engagement and positioning, and cooperates with the use of the limit pin to increase the stability of the rear end cover assembly;

[0026] 2. A rotary sealing mechanism is provided, wherein a lever assembled in a slide groove provided in the rotating member controls the positioning of the rotary sealing plate, stably controls the position of the sealing plate, and cooperates with the pinion gear to improve the stability of the sealing plate during adjustment;

[0027] 3. A small gear that is easy to rotate is provided to effectively cooperate with the large gear on the rotating part to control the rotation, thereby controlling the adjustment of the sealing plate. When the rotating part is adjusted, it will form a sealed nest with the inner side of the motor housing to prevent side leakage;

[0028] Furthermore, the sealing plate can detect gas through the air detection element, and then rotate when the content of flammable and explosive gas is high, so as to seal the sealing plate and the rotating shaft; and when the content of flammable and explosive gas cannot reach the level that can ignite and explode, the sealing plate is opened to avoid affecting the heat dissipation of the rotor. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the three-dimensional structure of the motor housing of the utility model;

[0030] Figure 2 This is a schematic diagram of a three-dimensional structure of a half-sectioned motor housing of the utility model;

[0031] Figure 3 It is a partial cross-sectional three-dimensional structural schematic diagram of the rear end cover of the utility model;

[0032] Figure 4 It is a partial cross-sectional three-dimensional structural schematic diagram of the movable ring of the utility model;

[0033] Figure 5 For this utility model Figure 4 A in the middle is an enlarged schematic diagram of the three-dimensional structure;

[0034] Figure 6 It is a semi-sectioned three-dimensional structural schematic diagram of the rotating part of the utility model.

[0035] In the figure: 1. motor housing; 2. junction box; 3. fixing bracket; 4. sealing shell; 5. rear end cover; 6. rotating shaft; 7. positioning assembly; 8. nesting frame; 9. air detection element; 10. clamping block; 11. reset spring 1; 12. limiting block; 13. moving ring; 14. moving block; 15. shifting block; 16. reset spring 2; 17. limiting pin; 18. small gear; 19. rotating part; 20. slide groove; 21. shifting rod; 22. positioning pin; 23. sealing plate. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0037] See also Figure 1-Figure 6 , the utility model provides the following technical solutions: an explosion-proof DC motor, provided with a motor housing 1 that is convenient for positioning and assembly, and a junction box 2 is installed on the outer surface of the motor housing 1, and a fixing frame 3 is installed on the outer surface of the motor housing 1;

[0038] Embodiment 1: Figure 1 and Figure 2 The technical solution shown in the utility model provides the following technical solution: an explosion-proof DC motor, disclosed:

[0039] It includes: a sealing shell 4, which is installed on the right side of the outer surface of the fixing frame 3, and the outer surface of the sealing shell 4 is connected with a rear end cover 5, and the rear end cover 5 is provided with an air positioning detection mechanism, and the air positioning detection mechanism can position and assemble the air detection element 9 assembled with the rear end cover 5;

[0040] The fixing frame 3 is arranged at equal angles with respect to the central axis of the outer surface of the sealing shell 4 , and the sealing shell 4 and the rear end cover 5 form a limited nesting structure, and the rear end cover 5 and the rotating shaft 6 form a positioning and rotating structure.

[0041] When in use, the motor housing 1 can be stably installed in the corresponding use position, and the rotation of the rotating shaft 6 on the rotor is controlled by the junction box 2, and the rotating shaft 6 stably passes through the sealing shell 4 assembled by the fixing frame 3 installed on the motor housing 1, and the end of the rotating shaft 6 is stably nested in the inner surface of the rear end cover 5, so as to effectively control the stability of the rotating shaft 6 when in use, and the motor housing 1 can control the stability of the sealing shell 4 and the rear end cover 5 when in use.

[0042] Embodiment 2: Figure 1-Figure 5 The technical solution shown, based on the first embodiment, further discloses the assembly of the air detection element 9 on the rear end cover 5 and the control of the stability of the rear end cover 5, and its specific contents are as follows:

[0043] The inner surface of the rear end cover 5 in the air positioning detection mechanism is nested with a rotating shaft 6, and the inner surface of the rear end cover 5 is symmetrically installed with a positioning component 7, and the inner surface of the positioning component 7 is slidably connected with a nesting frame 8, and the upper surface of the nesting frame 8 is nested with an air detection element 9;

[0044] The lower surface of the positioning assembly 7 is slidably connected with a block 10, and the upper surface of the block 10 is snap-connected with a nesting frame 8, and the lower surface of the block 10 is snap-connected with a return spring 11;

[0045] A limit block 12 is installed on the outer surface of the rear end cover 5, and the outer surface of the limit block 12 is connected to a moving block 14 slidably assembled with the sealing shell 4, and a moving ring 13 is installed on the outer surface of the moving block 14, and a shift block 15 is installed on the upper surface of the moving ring 13, and then the outer surface of the moving block 14 is fitted and connected with a return spring 2 16, and the moving ring 13, the moving block 14, the shift block 15 and the return spring 2 16 are nested in the inner surface of the sealing shell 4, and a limit pin 17 is installed on the right side of the outer surface of the sealing shell 4.

[0046] The positioning component 7 is symmetrically embedded in the middle section of the inner side of the outer surface of the rear end cover 5, and the positioning component 7 forms a built-in nesting structure through the nesting frame 8 and the air detection element 9, and the nesting frame 8 and the card block 10 form a limiting card structure, and the card block 10 forms an elastic sliding structure with the positioning component 7 through a reset spring 11.

[0047] The limit block 12 is embedded and installed on the left side of the central axis of the outer surface of the rear end cover 5, and the rear end cover 5 forms a limit locking structure with the moving block 14 through the limit block 12, and the moving block 14 forms an integrated structure with the moving ring 13 and the shift block 15. At the same time, the moving block 14, the moving ring 13 and the shift block 15 form a nested sliding structure with the sealing shell 4, and then the moving block 14 forms an elastic extrusion structure with the sealing shell 4 through the return spring 16, and the sealing shell 4 forms a positioning and limiting structure with the rear end cover 5 through the limit pin 17.

[0048] When in use, the nesting frame 8 assembled by the air detection element 9 is slidably installed on the inner surface of the positioning component 7 assembled by the rear end cover 5, and the reset spring 11 assembled by the positioning component 7 and the clamping block 10 connected to the upper side of the reset spring 11 can be elastically slid on the inner surface of the positioning component 7, so as to form a limit engagement with the nesting frame 8, and facilitate the air detection element 9 to stably form a rapid detection of the content of flammable and explosive gases in the air at the air inlet of the cooling fan, and facilitate the disassembly and replacement of the air detection element 9 when it is damaged in the later stage;

[0049] When the rear end cover 5 is in use, the limit block 12 installed on the rear end cover 5 can be engaged with the moving block 14 assembled with the sealing shell 4 to cooperate with the limit pin 17 assembled with the sealing shell 4 to form a stable nesting on the inner surface of the rear end cover 5, effectively controlling the stable installation between the rear end cover 5 and the sealing shell 4, and when the limit block 12 contacts with the moving block 14, the moving block 14 can be controlled to contact and squeeze with the return spring 2 16, and the moving ring 13 and the shift block 15 installed on the moving block 14 rotate at the same time, and when the limit block 12 continues to move, the moving block 14 effectively elastically controls the moving block 14 to form a limited engagement with the limit block 12 through the elasticity of the assembled return spring 2 16, thereby improving the stability of the connection between the rear end cover 5 and the sealing shell 4.

[0050] Embodiment 3: Figure 1 , Figure 2 and Figure 6 The technical solution shown in the figure, based on the second embodiment, further discloses that the rotating member 19 adjusts the sealing stability of the positioning pin 22 at the connection between the rotor and the brush, and the specific contents are as follows:

[0051] The pinion 18 is rotatably connected to the outer surface of the motor housing 1, and the outer surface of the pinion 18 is meshedly connected to a large gear mounted with a rotating member 19, and a rotating sealing mechanism is provided on the rotating member 19, and the rotating sealing mechanism can effectively prevent external flammable gas from entering the brush area.

[0052] A slide groove 20 is provided on the inner surface of the rotating part 19 in the rotary sealing mechanism, and a lever 21 is slidably connected to the inner surface of the slide groove 20, and a sealing plate 23 is installed on the outer surface of the lever 21, and a positioning pin 22 is installed on the right edge of the outer surface of the sealing plate 23, and the positioning pin 22 is nested in the left side of the inner surface of the sealing shell 4.

[0053] The slide groove 20 is opened at an equal angle about the center axis of the inner surface of the rotating member 19, and the rotating member 19 and the motor housing 1 form a sealed nested structure, and the large gear on the rotating member 19 and the small gear 18 form a meshing structure, and at the same time, the rotating member 19 forms a limited sliding structure with the lever 21 through the slide groove 20, and then the lever 21 and the sealing plate 23 and the positioning pin 22 form an integrated structure, and the lever 21 and the positioning pin 22 form an off-axis installation on the sealing plate 23, and the sealing plate 23 forms a positioning rotation structure with the sealing shell 4 through the positioning pin 22.

[0054] When the air detection element 9 detects that the content of flammable and explosive gases is high, the small servo motor assembled on the motor housing 1 can be used to control the small gear 18 installed on the output shaft to rotate, and the small gear 18 can be meshed with the large gear on the rotating member 19, so as to control the rotating member 19 to form a sealed gas rotation in the motor housing 1, so that the slide groove 20 provided on the rotating member 19 will form a sliding extrusion with the lever 21 assembled therein, and drive the sealing plate 23 installed on the lever 21 to be positioned and assembled through the positioning pin 22 to form a central rotation, and the side of the sealing plate 23 is in contact with the rotating shaft 6, so as to control the sealing plate 23 to form a sealing treatment on the rotor and brush assembled on the rotating shaft 6 to prevent flammable and explosive gases from entering, and when the content of flammable and explosive gases is low and combustion and explosion cannot occur, the sealing plate 23 can be controlled to open to prevent affecting the heat dissipation of the rotor.

[0055] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0056] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An explosion-proof DC motor, provided with a motor housing (1) that is easy to position and assemble, a junction box (2) being mounted on the outer surface of the motor housing (1), and a fixing frame (3) being mounted on the outer surface of the motor housing (1); It is characterized in that include: A sealing shell (4) is mounted on the right side of the outer surface of the fixing frame (3), and the outer surface of the sealing shell (4) is connected to a rear end cover (5), and the rear end cover (5) is provided with an air positioning detection mechanism, and the air positioning detection mechanism can position and assemble the air detection element (9) assembled on the rear end cover (5); The pinion gear (18) is rotatably connected to the outer surface of the motor housing (1), and the outer surface of the pinion gear (18) is meshingly connected to a large gear mounted on a rotating member (19), and a rotating sealing mechanism is provided on the rotating member (19), and the rotating sealing mechanism can effectively prevent external flammable gas from entering the brush area.

2. An explosion-proof DC motor according to claim 1, characterized in that: The fixing frame (3) is arranged at equal angles with respect to the central axis of the outer surface of the sealing shell (4), and the sealing shell (4) and the rear end cover (5) form a limited nesting structure, and the rear end cover (5) and the rotating shaft (6) form a positioning rotation structure.

3. An explosion-proof DC motor according to claim 1, characterized in that: The inner surface of the rear end cover (5) in the air positioning detection mechanism is nested with a rotating shaft (6), and a positioning assembly (7) is symmetrically mounted on the inner surface of the rear end cover (5), and a nesting frame (8) is slidably connected to the inner surface of the positioning assembly (7), and an air detection element (9) is nested on the upper surface of the nesting frame (8); The lower surface of the positioning assembly (7) is slidably connected to a clamping block (10), the upper surface of the clamping block (10) is snap-fittedly connected to a nesting frame (8), and the lower surface of the clamping block (10) is snap-fittedly connected to a return spring 1 (11); A limit block (12) is installed on the outer surface of the rear end cover (5), and the outer surface of the limit block (12) is connected to a moving block (14) slidably assembled with the sealing shell (4), and a moving ring (13) is installed on the outer surface of the moving block (14), and a shifting block (15) is installed on the upper surface of the moving ring (13), and then the outer surface of the moving block (14) is fitted with a second return spring (16), and the moving ring (13), the moving block (14), the shifting block (15) and the second return spring (16) are nested in the inner surface of the sealing shell (4), and a limit pin (17) is installed on the right side of the outer surface of the sealing shell (4).

4. An explosion-proof DC motor according to claim 3, characterized in that: The positioning component (7) is symmetrically embedded in the middle section of the inner side of the outer surface of the rear end cover (5), and the positioning component (7) forms a built-in nesting structure with the air detection element (9) through the nesting frame (8), and the nesting frame (8) and the clamping block (10) form a limit clamping structure, and the clamping block (10) and the positioning component (7) form an elastic sliding structure through a return spring (11).

5. The explosion-proof DC motor according to claim 3, characterized in that: The limit block (12) is embedded and installed on the left side of the central axis of the outer surface of the rear end cover (5), and the rear end cover (5) forms a limit engaging structure with the moving block (14) through the limit block (12), and the moving block (14) forms an integrated structure with the moving ring (13) and the shifting block (15). At the same time, the moving block (14), the moving ring (13) and the shifting block (15) form a nested sliding structure with the sealing shell (4), and the moving block (14) and the sealing shell (4) form an elastic extrusion structure through the second return spring (16), and the sealing shell (4) and the rear end cover (5) form a positioning limit structure through the limit pin (17).

6. The explosion-proof DC motor according to claim 1, characterized in that: The inner surface of the rotating member (19) in the rotary sealing mechanism is provided with a slide groove (20), and the inner surface of the slide groove (20) is slidably connected to a lever (21), and a sealing plate (23) is installed on the outer surface of the lever (21), and a positioning pin (22) is installed on the right side edge of the outer surface of the sealing plate (23), and the positioning pin (22) is nested in the left side of the inner surface of the sealing shell (4).

7. An explosion-proof DC motor according to claim 6, characterized in that: The slide groove (20) is opened at equal angles with respect to the center axis of the inner surface of the rotating member (19), and the rotating member (19) and the motor housing (1) form a sealed nesting structure, and the large gear on the rotating member (19) and the small gear (18) form a meshing structure, and the rotating member (19) forms a limited sliding structure with the shifting rod (21) through the slide groove (20), and the shifting rod (21) forms an integrated structure with the sealing plate (23) and the positioning pin (22), and the shifting rod (21) and the positioning pin (22) are installed off-axis on the sealing plate (23), and the sealing plate (23) forms a positioning rotating structure with the sealing shell (4) through the positioning pin (22).

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