A starter anti-waterlogging structure

Abstract

The present invention discloses a starter anti-water immersion structure, wherein the inner cavity of the starter body is a closed space, and at least two breathing pressure valves are arranged on the body, the breathing pressure valve is a one-way check structure, and the two breathing pressure valves are arranged on the body in opposite directions, thereby forming a natural air intake port and an exhaust port. The above-mentioned starter adopts a structure in which the body is fully sealed and two sets of breathing pressure valves are used in conjunction, which fully guarantees the waterproof performance. At the same time, the setting of the breathing pressure valve makes the air pressure in the inner cavity of the body balanced, and it can automatically exhaust when the internal high pressure expands, and automatically extinguish the open flame when the internal combustion starts. Therefore, the functions of waterproofing, fire prevention, and regulating internal pressure are realized, the performance of the starter under extreme conditions is improved, and a breakthrough in the functionality of the motor is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of motor sealing, and in particular to a starter anti-water immersion structure. Background Art

[0002] The motor is a device with very high functional requirements. It is easily damaged by external dust and water, which affects its service life. Especially in harsh working conditions, the sealing requirements are higher. Especially the waterproof requirements, so the ideal structure of the motor's inner cavity should be a closed structure. However, the motor will generate heat when it is in continuous working state. The inner cavity will cause the internal gas to expand when it is sealed, and the internal pressure will increase, causing the body to rupture, and even in extreme conditions, high temperature will cause the motor to burn. Therefore, there are disadvantages to a completely sealed structure. In addition to considering the waterproofness of the body, the expansion and exhaust capacity and fire prevention function must also be considered.

[0003] Figure 1 The figure shows a motor body assembly, which consists of a split front cover, middle cover, housing, rear cover, isolator, switch assembly and lead wire assembly. There are many connections between the components, and it is difficult to ensure the sealing, resulting in poor water-proof ability and short service life. In addition, when the motor is in continuous operation, the low-sealing structure has the risk of high-temperature heating and combustion, resulting in damage.

[0004] However, for the above-mentioned body structure, after ensuring the sealing, it is necessary to set up an additional exhaust device for use in conjunction to achieve the effect of adjusting the air pressure in the inner cavity. In the prior art, there is a design of setting an electric control valve on the casing, which monitors parameters such as temperature and pressure by cooperating with sensors. Once the detected value is abnormal, the valve is controlled to open to achieve the purpose of pressure relief. When the detected value is normal, the valve is controlled to reset and close. This kind of structural control system is relatively complex and costly, has high requirements on sensor sensitivity, has a high failure rate, has poor anti-immersion ability, and requires a large degree of modification to the motor structure, resulting in insufficient adaptability.

[0005] Therefore, it is necessary to design a water-proof structure for it, which should have waterproof, breathable, fireproof and other functions. Summary of the invention

[0006] Based on the above, the purpose of the present invention is to provide a starter anti-flooding structure, which adds an air pressure regulation function after ensuring the sealing of the body, solves the disadvantages of the completely sealed structure, and meets the anti-flooding design requirements.

[0007] To achieve the above object, the present invention adopts the following technical solutions:

[0008] A starter anti-immersion structure, wherein the inner cavity of the starter body is a closed space, and at least two breathing pressure valves are arranged on the body, the breathing pressure valve is a one-way check structure, and the two breathing pressure valves are arranged on the body in opposite directions to form a natural intake port and an exhaust port.

[0009] Furthermore, the breathing pressure valve includes a base, a dustproof nut, a spring seat and a steel ball. One end of the base is a fixed part, and the other end is a connecting part. A connecting inner cavity is axially opened on the end face of the fixed part, an internal thread is arranged on the side wall of the connecting inner cavity, and a through hole extending to the end face of the connecting part is opened on the end face wall. The connecting part is provided with an external thread. A single-opening inner cavity is axially opened on the dustproof nut, and an internal thread matching the external thread of the base is arranged on its inner wall. A first air vent connecting the outside world and its inner cavity is opened on the dustproof nut. A single-opening inner cavity is axially opened on the spring seat, and an external thread matching the internal thread of the base is arranged on its surface. A second air vent connecting the outside world and its inner cavity is opened on the spring seat. The steel ball is arranged in the inner cavity of the spring seat, and a pressure spring acting on the steel ball and pushing it outward is also arranged in the inner cavity of the spring seat. The diameter of the steel ball is larger than the aperture of the through hole. The spring seat opening is connected to the base, and the steel ball forms a spherical seal on the through hole under the action of the pressure spring.

[0010] Furthermore, a first sealing ring is sandwiched between the steel ball and the end surface wall connected to the inner cavity.

[0011] Furthermore, the fixing portion protrudes from the surface of the connecting portion, and the fixing portion and the dustproof nut form a clamp to act on the inner wall and the outer wall of the machine body.

[0012] Furthermore, the machine body comprises a front cover, a middle cover, a casing and a rear cover which are sealed and connected in sequence, and the breathing pressure valve is installed on any one of the front cover, the middle cover, the casing and the rear cover.

[0013] Furthermore, a second sealing ring and a first sealing gasket are arranged between the front cover and the middle cover. The front cover and the middle cover are in a concave-convex plug-in structure. A first groove is opened on the circumference of the convex part of the middle cover. The second sealing ring is arranged in the first groove and contacts with the inner wall of the front cover to form a circumferential seal. The first sealing gasket is clamped between the concave end face of the front cover and the convex end face of the middle cover to form a surface seal.

[0014] Furthermore, a third sealing ring and a second sealing gasket are arranged between the middle cover and the casing. The middle cover and the casing are in a concave-convex plug-in structure. A second groove is opened on the circumference of the convex part of the casing. The third sealing ring is arranged in the second groove and contacts with the inner wall of the middle cover to form a circumferential seal. The second sealing gasket is clamped between the concave end face of the middle cover and the convex end face of the casing to form a surface seal.

[0015] Furthermore, a fourth sealing ring, a fifth sealing ring and a third sealing gasket are arranged between the casing and the back cover, the back cover and the casing are in a concave-convex plug-in structure, a third groove is opened on the circumference of the convex part of the casing, the fourth sealing ring is arranged in the third groove, and contacts with the inner wall of the back cover to form a circumferential seal, the fifth sealing ring is clamped between the concave end face of the back cover and the convex end face of the casing to form a surface seal, the convex end face of the casing is raised with a waterproof rib, and the third sealing gasket is pressed against the waterproof rib by the back cover to form a surface seal.

[0016] Furthermore, the breathing pressure valves are arranged in pairs on the rear cover, and a sixth sealing ring and a fourth sealing gasket are sandwiched between the breathing pressure valves and the inner wall and / or outer wall of the rear cover.

[0017] Furthermore, a one-way device is connected to the front cover through a sealing ring, and a switch assembly is also provided at the connection between the front cover and the middle cover. A rubber block is clamped at the connection between the switch assembly, the front cover and the middle cover. A waterproof pressure plate is provided outside the rubber block, and the waterproof pressure plate is fixed on the front cover and contacts with the outer walls of the switch assembly and the middle cover at the same time. A lead wire assembly and a pole bolt are provided on the casing, and the connection is sealed by sealing rings respectively. A brush holder bolt is provided on the rear cover, and the connection is sealed by a sealing ring.

[0018] In summary, the beneficial effect of the present invention is that, compared with the prior art, the starter anti-flooding structure adopts a structure in which the body is fully sealed and two sets of breathing pressure valves are used in conjunction, which fully guarantees the waterproof performance. At the same time, the setting of the breathing pressure valve makes the air pressure in the body cavity balanced, and it can automatically exhaust when the internal high pressure expands. When the internal combustion starts, the instantaneous lack of oxygen automatically extinguishes the open flame, thereby realizing the functions of waterproofing, fire prevention, and regulating internal pressure, improving the performance of the starter under extreme conditions, and achieving a functional breakthrough in the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of a starter body targeted by the starter anti-waterlogging structure provided by an embodiment of the present invention;

[0020] Figure 2 is an exploded view of a starter anti-waterlogging structure provided by an embodiment of the present invention;

[0021] Figure 3 It is a structural explosion diagram of a breathing pressure valve in a starter anti-flooding structure provided by an embodiment of the present invention;

[0022] Figure 4 yes Figure 1 Sectional view at AA;

[0023] Figure 5 yes Figure 1 Sectional view at the middle BB;

[0024] Figure 6 yes Figure 1 Cross-section at CC;

[0025] Figure 7 yes Figure 1 Sectional view at DD;

[0026] Figure 8 yes Figure 1 Sectional view at EE;

[0027] Fig. 9 yes Figure 7 Enlarged view of point F in the middle;

[0028] Fig.10 yes Figure 7 Enlarged view of point G in the middle;

[0029] Fig.11 yes Figure 8 Enlarged view of H in the middle;

[0030] Fig.12 yes Figure 2 Enlarged view of point I in the middle.

[0031] In the figure:

[0032] 1-breathing pressure valve; 2-base; 3-dustproof nut; 4-spring seat; 5-steel ball; 6-fixing part; 7-connecting part; 8-connecting inner cavity; 9-through hole; 10-first air hole; 11-second air hole; 12-air gap; 13-pressure spring; 14-first sealing ring; 15-front cover; 16-middle cover; 17-casing; 18-back cover; 19-second sealing ring; 20-first sealing pad; 21-first groove; 22-third sealing ring; 23-second sealing pad; 24-second groove; 25-fourth sealing ring; 26-fifth sealing ring; 27-third sealing pad; 28-third groove; 29-waterproof rib; 30-sixth sealing ring; 31-fourth sealing pad; 32-one-way device; 33-switch assembly; 34-rubber block; 35-waterproof pressure plate; 36-lead wire assembly; 37-pole bolt; 38-brush holder bolt. DETAILED DESCRIPTION

[0033] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0034] See also Figures 1 to 12 As shown, this embodiment provides a starter anti-water immersion structure, the inner cavity of the starter body is a closed space, and at least two breathing pressure valves 1 are arranged on the body, the breathing pressure valve 1 is a one-way check structure, and the two breathing pressure valves 1 are arranged on the body in opposite directions to form a natural intake port and an exhaust port.

[0035] During installation, two breathing pressure valves 1 are used in pairs and installed oppositely. Two installation ports are opened on the motor body, and the valves can be installed at any suitable position of the motor body to achieve the function of automatically adjusting the pressure with one breath in and one breath out.

[0036] The breathing pressure valve 1 comprises a base 2, a dustproof nut 3, a spring seat 4 and a steel ball 5.

[0037] One end of the base 2 is a fixing portion 6, and the other end is a connecting portion 7. A connecting inner cavity 8 is axially provided on the end face of the fixing portion 6, an internal thread is provided on the side wall of the connecting inner cavity 8, and a through hole 9 extending to the end face of the connecting portion 7 is provided on the end face wall, and an external thread is provided on the connecting portion 7.

[0038] The dust nut 3 is provided with a single-opening inner cavity along the axial direction, and its inner wall is provided with an internal thread that cooperates with the external thread of the base 2. The dust nut 3 is provided with a first air vent 10 that connects the outside world with its inner cavity. The first air vent 10 is located on the side of the dust nut 3.

[0039] A single-opening inner cavity is provided in the axial direction on the spring seat 4, and an outer thread matching the inner thread of the base 2 is provided on the surface thereof. A second air hole 11 connecting the outside and its inner cavity is provided on the spring seat 4, and the second air hole 11 is located on the side of the spring seat 4. An expansion hole is provided at the end connecting the inner cavity 8 to the fixing portion 6, so that there is an air gap 12 between the base 2 and the spring seat 4, and the second air hole 11 is connected to the air gap 12. A third air hole is provided on the fixing portion 6, and the third air hole is connected to the air gap 12.

[0040] The steel ball 5 is arranged in the inner cavity of the spring seat 4, and a pressure spring 13 is also arranged in the inner cavity of the spring seat 4 to act on the steel ball 5 and push it outward. The diameter of the steel ball 5 is larger than the aperture of the through hole 9. The spring seat 4 is connected to the base 2 with its opening facing the base 2. The steel ball 5 forms a spherical seal on the through hole 9 under the action of the pressure spring 13. A first sealing ring 14 is also sandwiched between the steel ball 5 and the end wall connected to the inner cavity 8 to improve the sealing performance. A rotating part is arranged on the spring seat 4, and the elastic force of the pressure spring 13 is adjusted by rotating the spring seat 4, thereby setting the balanced air pressure.

[0041] The fixing portion 6 protrudes from the surface of the connecting portion 7 , and the fixing portion 6 and the dustproof nut 3 form a clamping force to act on the inner wall and the outer wall of the machine body.

[0042] This embodiment uses Figure 1Take the starter body in the example, the body includes a front cover 15, a middle cover 16, a housing 17 and a rear cover 18 which are sealed and connected in sequence, and the breathing pressure valve 1 is installed on any one of the front cover 15, the middle cover 16, the housing 17 and the rear cover 18. In this embodiment, the breathing pressure valve 1 is arranged in pairs on the rear cover 18, and a sixth sealing ring 30 and a fourth sealing gasket 31 are sandwiched between the breathing pressure valve 1 and the inner wall and / or the outer wall of the rear cover 18. Specifically, the sixth sealing ring 30 and the fourth sealing gasket 31 are mainly located between the fixing portion 6 of the breathing pressure valve 1 and the shell wall of the rear cover 18, and then tightened by tightening the dustproof nut 3.

[0043] A second sealing ring 19 and a first sealing gasket 20 are arranged between the front cover 15 and the middle cover 16. The front cover 15 and the middle cover 16 are in a concave-convex plug-in structure. A first groove 21 is opened on the circumference of the convex part of the middle cover 16. The second sealing ring 19 is arranged in the first groove 21 and contacts with the inner wall of the front cover 15 to form a circumferential seal. The first sealing gasket 20 is clamped between the concave end face of the front cover 15 and the convex end face of the middle cover 16 to form a surface seal.

[0044] A third sealing ring 22 and a second sealing gasket 23 are arranged between the middle cover 16 and the casing 17. The middle cover 16 and the casing 17 are in a concave-convex plug-in structure. A second groove 24 is opened on the circumference of the convex part of the casing 17. The third sealing ring 22 is arranged in the second groove 24 and contacts with the inner wall of the middle cover 16 to form a circumferential seal. The second sealing gasket 23 is clamped between the concave end face of the middle cover 16 and the convex end face of the casing 17 to form a surface seal.

[0045] A fourth sealing ring 25, a fifth sealing ring 26 and a third sealing gasket 27 are arranged between the housing 17 and the back cover 18. The back cover 18 and the housing 17 are in a concave-convex plug-in structure. A third groove 28 is opened on the circumference of the convex part of the housing 17. The fourth sealing ring 25 is arranged in the third groove 28 and contacts with the inner wall of the back cover 18 to form a circumferential seal. The fifth sealing ring 26 is clamped between the concave end face of the back cover 18 and the convex end face of the housing 17 to form a surface seal. A waterproof rib 29 protrudes from the convex end face of the housing 17. The third sealing gasket 27 is pressed against the waterproof rib 29 by the back cover 18 to form a surface seal.

[0046] A check valve 32 is connected to the front cover 15 through a sealing ring. A switch assembly 33 is also provided at the connection between the front cover 15 and the middle cover 16. A rubber block 34 is clamped at the connection between the switch assembly 33, the front cover 15 and the middle cover 16. A waterproof pressure plate 35 is provided outside the rubber block 34. The waterproof pressure plate 35 is fixed to the front cover 15 and contacts with the outer walls of the switch assembly 33 and the middle cover 16 at the same time. A lead wire assembly 36 and a pole bolt 37 are provided on the casing 17, and the connection is sealed by sealing rings respectively. A brush holder bolt 38 is provided on the rear cover 18, and the connection is sealed by a sealing ring.

[0047] In summary, the above-mentioned starter anti-immersion structure adopts a structure in which the body is fully sealed and two sets of breathing pressure valves are used in conjunction, which fully guarantees the waterproof performance. At the same time, the setting of the breathing pressure valve makes the air pressure in the body cavity balanced. When the internal high pressure expands, it can automatically exhaust the air. When the internal combustion starts, the instantaneous lack of oxygen will automatically extinguish the open flame, thereby realizing the functions of waterproofing, fire prevention, and regulating internal pressure, improving the performance of the starter under extreme conditions, and achieving a functional breakthrough in the motor.

[0048] The above embodiments are only to illustrate the basic principles and characteristics of the present invention. The present invention is not limited by the above examples. Without departing from the spirit and scope of the present invention, the present invention may be subject to various changes and modifications, which are within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A starter anti-flooding structure, characterized in that: The inner cavity of the starter is a closed space, and at least two breathing pressure valves are arranged on the body. The breathing pressure valve is a one-way check structure. The two breathing pressure valves are arranged on the body in opposite directions, thereby forming a natural air intake port and an air exhaust port. The breathing pressure valve comprises a base, a dustproof nut, a spring seat and a steel ball. One end of the base is a fixing part, and the other end is a connecting part. A connecting inner cavity is provided on the end surface of the fixing part in the axial direction. An internal thread is provided on the side wall of the connecting inner cavity, and a through hole extending to the end surface of the connecting part is provided on the end surface wall. An external thread is provided on the connecting part. The dustproof nut is provided with a single-opening inner cavity along the axial direction, and an inner thread matching the outer thread of the base is provided on the inner wall thereof. The dustproof nut is provided with a first air vent connecting the outside with the inner cavity. The spring seat is provided with a single opening inner cavity along the axial direction, and its surface is provided with an outer thread matching with the inner thread of the base, and the spring seat is provided with a second air vent connecting the outside and its inner cavity. The steel ball is arranged in the inner cavity of the spring seat, and a pressure spring is also arranged in the inner cavity of the spring seat to act on the steel ball and push it outward, the diameter of the steel ball is larger than the aperture of the through hole, the spring seat opening is connected to the base, and the steel ball is acted upon by the pressure spring to form a spherical seal on the through hole; A first sealing ring is sandwiched between the steel ball and the end wall of the connecting inner cavity; The fixing portion protrudes from the surface of the connecting portion, and the fixing portion and the dustproof nut form a clamp to act on the inner wall and the outer wall of the machine body.

2. The starter anti-waterlogging structure according to claim 1, characterized in that: The machine body comprises a front cover, a middle cover, a casing and a rear cover which are sealed and connected in sequence, and the breathing pressure valve is installed on any one of the front cover, the middle cover, the casing and the rear cover.

3. The starter anti-waterlogging structure according to claim 2, characterized in that: A second sealing ring and a first sealing gasket are arranged between the front cover and the middle cover. The front cover and the middle cover are in a concave-convex plug-in structure. A first groove is opened on the circumference of the convex part of the middle cover. The second sealing ring is arranged in the first groove and contacts with the inner wall of the front cover to form a circumferential seal. The first sealing gasket is clamped between the concave end face of the front cover and the convex end face of the middle cover to form a surface seal.

4. The starter anti-waterlogging structure according to claim 2, characterized in that: A third sealing ring and a second sealing gasket are arranged between the middle cover and the casing. The middle cover and the casing are in a concave-convex plug-in structure. A second groove is opened on the circumference of the convex part of the casing. The third sealing ring is arranged in the second groove and contacts with the inner wall of the middle cover to form a circumferential seal. The second sealing gasket is clamped between the concave end face of the middle cover and the convex end face of the casing to form a surface seal.

5. The starter anti-waterlogging structure according to claim 2, characterized in that: A fourth sealing ring, a fifth sealing ring and a third sealing gasket are arranged between the casing and the back cover. The back cover and the casing are in a concave-convex plug-in structure. A third groove is opened on the circumference of the convex part of the casing. The fourth sealing ring is arranged in the third groove and contacts with the inner wall of the back cover to form a circumferential seal. The fifth sealing ring is clamped between the concave end face of the back cover and the convex end face of the casing to form a surface seal. A waterproof rib is raised on the convex end face of the casing. The third sealing gasket is pressed against the waterproof rib by the back cover to form a surface seal.

6. The starter anti-waterlogging structure according to claim 2, characterized in that: The breathing pressure valves are arranged in pairs on the rear cover, and a sixth sealing ring and a fourth sealing pad are sandwiched between the breathing pressure valves and the inner wall and / or outer wall of the rear cover.

7. The starter anti-waterlogging structure according to claim 2, characterized in that: The front cover is connected with a one-way device via a sealing ring, a switch assembly is also provided at the connection between the front cover and the middle cover, a rubber block is clamped at the connection between the switch assembly, the front cover and the middle cover, a waterproof pressure plate is provided outside the rubber block, the waterproof pressure plate is fixed to the front cover and is in contact with the outer walls of the switch assembly and the middle cover at the same time, a lead wire assembly and a pole bolt are provided on the casing, and the connection is sealed by sealing rings respectively, and a brush holder bolt is provided on the rear cover, and the connection is sealed by a sealing ring.

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