Motor rotating shaft sealing structure and motor

Abstract

The utility model belongs to the technical field of motor rotating shaft sealing, and particularly relates to a motor rotating shaft sealing structure and a motor. A driving shaft connected with the output end of the motor penetrates through the protection mechanism and is connected with the protection mechanism. The protection mechanism comprises a protection plate, a dynamic protection mechanism and a static protection mechanism are arranged on the protection plate, and the dynamic protection mechanism and the static protection mechanism are both connected with the driving shaft; wherein the static protection mechanism is suitable for clamping the driving shaft when the motor is shut down, sealing a gap between the driving shaft and the motor, and loosening the driving shaft when the motor is started; and the dynamic protection mechanism is suitable for exhausting air in a gap between the driving shaft and the motor when the motor is started.

Description

Technical Field

[0001] The utility model belongs to the technical field of motor shaft sealing, and in particular relates to a motor shaft sealing structure and a motor. Background Art

[0002] Rubber is usually used for sealing between the motor shaft and the end cover. For example, the Chinese patent application "Sealing structure between motor shaft and motor cover" (CN201410010078.1) discloses a labyrinth seal structure between the motor shaft and the front end cover, which consists of a motor shaft, a motor cover, a sealing ring, an elastic clamp and a sleeve. The disadvantage is that the sealing structure consists of a primary labyrinth seal and a primary rubber sealing ring seal. This contact seal has friction, increased mechanical loss, and is prone to rubber wear. The worn rubber is prone to gaps. If the sealing performance is not good, impurities such as dust will enter the motor, affecting the normal use and service life of the motor.

[0003] Therefore, a motor shaft sealing structure is designed to solve the technical problem in the prior art that the sealing structure between the motor shaft and the motor body has friction, which causes loss and affects the sealing. Utility Model Content

[0004] The purpose of the utility model is to provide a motor shaft sealing structure and a motor to solve the above technical problems.

[0005] In order to solve the above technical problems, the utility model provides a motor shaft sealing structure, including: a protection mechanism arranged on one side of the motor;

[0006] A drive shaft connected to the output end of the motor passes through the protection mechanism and is connected to the protection mechanism; and

[0007] The protection mechanism comprises a protection plate, on which a dynamic protection mechanism and a static protection mechanism are arranged, and both the dynamic protection mechanism and the static protection mechanism are connected to the drive shaft; wherein

[0008] The static protection mechanism is suitable for clamping the drive shaft when the motor is stopped, sealing the gap between the drive shaft and the motor, and releasing the drive shaft when the motor is started;

[0009] The dynamic protection mechanism is suitable for pumping air from the gap between the drive shaft and the motor when the motor is started.

[0010] On the other hand, the utility model also provides a motor, which adopts the motor shaft sealing structure as described above.

[0011] The beneficial effect of the utility model is that the utility model is provided with a static protection mechanism, which can clamp the motor shaft when the motor is stationary and seal the gap between the motor shaft and the motor body to prevent dust from entering the inside of the motor through the gap; when the motor is started, the motor shaft is loosened without affecting the rotation of the motor shaft, and the gap between the motor shaft and the motor body is evacuated through the dynamic protection mechanism to prevent dust around the motor shaft from entering.

[0012] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by practicing the utility model. The purpose and other advantages of the utility model are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0013] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the overall front cross-sectional structure of the utility model;

[0017] Figure 3 It is a schematic diagram of the overall side sectional structure of the utility model;

[0018] Figure 4 The utility model Figure 3 The enlarged structural diagram of part A in the middle;

[0019] Figure 5 The utility model Figure 3 The enlarged structural diagram of part B in the middle;

[0020] Figure 6 The utility model Figure 5 Schematic diagram of the enlarged structure of part C in the middle.

[0021] In the figure:

[0022] 1. Protection mechanism; 10. Protection plate; 11. U-shaped baffle; 12. Driving bevel gear;

[0023] 2. Motor; 20. Drive shaft;

[0024] 3. Dynamic protection mechanism; 30. Dynamic rotating shaft; 31. Dynamic driven bevel gear; 32. Fan blade; 33. Connecting shaft;

[0025] 4. Static protection mechanism; 40. Arc seal; 400. Limiting groove; 401. Slide groove; 41. Short shaft; 410. Limiting ball; 411. Limiting rod; 42. Static driven bevel gear; 43. Bushing; 44. First return spring; 45. Telescopic rod; 46. Second return spring. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of 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.

[0027] Existing contact seals have problems of increased friction and mechanical loss, and are prone to rubber wear. The worn rubber is prone to gaps. If the sealing performance is poor, dust and other impurities will enter the motor, affecting the normal use and service life of the motor.

[0028] To solve the above technical problems, in at least one embodiment, a motor shaft sealing structure is provided, comprising: a protective mechanism 1 arranged on one side of the motor 2; wherein the drive shaft 20 connected to the output end of the motor 2 passes through the protective mechanism 1 and is connected to the protective mechanism 1; and the protective mechanism 1 includes a protective plate 10, on which a dynamic protective mechanism 3 and a static protective mechanism 4 are arranged, and the dynamic protective mechanism 3 and the static protective mechanism 4 are both connected to the drive shaft 20; wherein the static protective mechanism 4 is suitable for clamping the drive shaft 20 when the motor 2 is stopped, sealing the gap between the drive shaft 20 and the motor 2, and releasing the drive shaft 20 when the motor 2 is started; the dynamic protective mechanism 3 is suitable for evacuating the gap between the drive shaft 20 and the motor 2 when the motor 2 is started.

[0029] By providing a static protection mechanism, the motor shaft can be clamped when the motor is stationary, and the gap between the motor shaft and the motor body can be sealed to prevent dust from entering the inside of the motor through the gap. When the motor is started, the motor shaft can be loosened without affecting the rotation of the motor shaft. The gap between the motor shaft and the motor body can be evacuated through the dynamic protection mechanism to prevent dust around the motor shaft from entering.

[0030] In some embodiments, Figure 1 to Figure 2 As shown, a protective plate 10 is connected to one end face of the driving shaft 20 of the motor 2 by bolts, and a through hole is provided on the protective plate 10, through which the driving shaft 20 passes, and a certain gap is left between the through hole, at least two arc-shaped seals 40 are provided, and they are semicircular, and the two arc-shaped seals 40 are both slidably connected to the protective plate 10. When the motor 2 is not started, the telescopic rod 45 is pushed out by the thrust of the second reset spring 46. At this time, the two arc-shaped seals 40 are pressed against each other, and the inner walls of the two are in contact with the outer wall of the driving shaft 20, so as to wrap the driving shaft 20 and seal the gap between the driving shaft 20 and the through hole, so as to prevent external dust from passing through the gap and entering the inside of the motor 2 during the shutdown process of the motor 2.

[0031] In some embodiments, Figure 5 to Figure 6 As shown, when the motor 2 starts to start, the driving shaft 20 rotates and drives the driving bevel gear 12 fixed thereon to rotate. The driving gear 12 meshes with the static driven bevel gear 42 set below it, driving the static driven bevel gear 42 and the shaft sleeve 43 to rotate. The shaft sleeve 43 is connected to the U-shaped baffle 11 bearing. Since the short shaft 41 is threadedly engaged with the inner wall of the shaft sleeve 43, the short shaft 41 will move vertically upward along the axial direction of the shaft sleeve 43, driving the limiting rod 411 at its top and the limiting ball 410 fixed at one end of the limiting rod 411 to move upward, and the limiting ball 410 slides in the slide groove 401 until it slides to the limiting groove 400 and is stuck in the two limiting grooves. At this time, the two arc-shaped seals 40 are pushed by the limiting ball 410, and the two are separated from each other by one end distance, loosening the clamping of the drive shaft 20, and not hindering the rotation of the drive shaft 20. When the motor 2 stops, it only needs to be reversed to engage the thread of the sleeve 43 with the short shaft 41, and the short shaft 41 can be retracted. The function of the second return spring 46 is to pull the short shaft 41 downward and contact the thread on the inner wall of the sleeve 43 (the height of the part with the thread on the short shaft 41 is the same as the height of the sleeve 43) to assist the downward movement of the short shaft 41. The limiting ball 410 disengages from the limiting groove 400 and the slide groove 401, and the two arc-shaped seals 40 re-contact to clamp the drive shaft 20.

[0032] In some embodiments, Figure 3 to Figure 4 As shown, when the motor 2 is started, the driving bevel gear 12 drives the dynamic driven bevel gear 31 meshing with it above to rotate, and the dynamic rotating shaft 30 is connected to the connecting shaft 33 bearing, that is, the dynamic rotating shaft 30 rotates under the drive of the dynamic driven bevel gear 31, so that the fan blades 32 rotate to blow air, and the air around the driving shaft 20 is extracted and blown upwards, so that during the rotation of the driving shaft 20, dust is prevented from passing through the gap between the driving shaft 20 and the protective plate 10 and entering the interior of the motor 2 by exhausting the exhaust gas, and at the same time, the blowing of the fan blades 32 can assist the motor 2 in cooling down.

[0033] On the other hand, in at least one embodiment, a motor is provided, which adopts the motor shaft sealing structure as described above.

[0034] To summarize, by providing a static protection mechanism, the motor shaft can be clamped when the motor is stationary, and the gap between the motor shaft and the motor body can be sealed to prevent dust from entering the inside of the motor through the gap. When the motor is started, the motor shaft is loosened without affecting the rotation of the motor shaft. The gap between the motor shaft and the motor body can be evacuated through the dynamic protection mechanism to prevent dust from entering around the motor shaft.

[0035] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0037] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A motor shaft sealing structure, It is characterized in that include: A protective mechanism provided on one side of the motor; in A drive shaft connected to the output end of the motor passes through the protection mechanism and is connected to the protection mechanism; and The protection mechanism comprises a protection plate, on which a dynamic protection mechanism and a static protection mechanism are arranged, and both the dynamic protection mechanism and the static protection mechanism are connected to the drive shaft; wherein The static protection mechanism is suitable for clamping the drive shaft when the motor is stopped, sealing the gap between the drive shaft and the motor, and releasing the drive shaft when the motor is started; The dynamic protection mechanism is suitable for pumping air from the gap between the drive shaft and the motor when the motor is started.

2. The motor shaft sealing structure according to claim 1, It is characterized in that A driving bevel gear is arranged on the outer wall of the driving shaft; The driving bevel gear is connected to the dynamic protection mechanism and the static protection mechanism respectively.

3. The motor shaft sealing structure according to claim 2, It is characterized in that The dynamic protection mechanism comprises: A dynamic rotating shaft, with a fan blade at its top and a dynamic driven bevel gear at its bottom; The dynamically driven bevel gear is meshed with the driving bevel gear.

4. The motor shaft sealing structure according to claim 3, It is characterized in that The protective plate is provided with a connecting shaft; wherein The dynamic rotating shaft passes through the connecting shaft and is connected to the connecting shaft bearing.

5. The motor shaft sealing structure according to claim 4, It is characterized in that The protective plate is provided with a U-shaped baffle; wherein The opening direction of the U-shaped baffle is consistent with the direction of the airflow generated by the rotation of the fan blades.

6. The motor shaft sealing structure according to claim 5, It is characterized in that The static protection mechanism comprises: An arc-shaped seal is arranged on the outside of the drive shaft; wherein The arc-shaped sealing member is connected to the inner wall of the U-shaped baffle via a telescopic rod; and A first return spring is sleeved on the outer side of the telescopic rod, one end of the first return spring is connected to the telescopic rod, and the other end is connected to the U-shaped baffle.

7. The motor shaft sealing structure according to claim 6, It is characterized in that A shaft sleeve is provided on the bottom surface of the inner wall of the U-shaped baffle; and The internal thread of the sleeve is connected with a short shaft, and the upper end surface of the sleeve is provided with a static driven bevel gear; wherein The bottom end of the short shaft passes through the bottom end of the U-shaped baffle.

8. The motor shaft sealing structure according to claim 7, It is characterized in that The static driven bevel gear is meshed with the driving bevel gear; and A second return spring is arranged between the bottom end of the short shaft and the auxiliary plate arranged below the U-shaped baffle; wherein One end of the second return spring is connected to the bottom end of the short shaft, and the other end is connected to the auxiliary plate.

9. The motor shaft sealing structure according to claim 8, It is characterized in that A limiting ball is arranged on the outer wall of the top end of the short shaft; and A sliding groove is provided on the outer wall of the arc-shaped sealing member; A limiting groove is arranged at the top of the slide groove.

10. A motor, It is characterized in that A motor shaft sealing structure as described in any one of claims 1 to 9 is adopted.

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