Oil-proof sealed plastic package motor

Abstract

The utility model discloses an oil-proof sealed plastic package motor, which relates to the technical field of plastic package motor equipment, and comprises a stator assembly and a rotor assembly arranged in the middle of the stator assembly in a penetrating manner, the stator assembly is provided with an end cover seat, the end cover seat is provided with an end cover, and the end cover is sleeved outside the rotor assembly. A supporting ring is arranged on the end cover seat, an outer ring is rotationally arranged on the side, facing the end cover seat, of the end cover, a first thread is arranged on the supporting ring, a second thread matched with the first thread in a threaded connection mode is arranged on the outer ring, and a rotary knob is arranged on the outer wall of the outer ring. And the end cover and the surface of the end part of the plastic package stator are easily damaged in the process, so that personnel can conveniently assemble and disassemble the end cover.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic-sealed motor equipment, and particularly relates to a plastic-sealed motor with an oil-proof seal structure. Background Art

[0002] A plastic-sealed motor is composed of a plastic-sealed stator, a shaft, a rotor, bearings, end covers, a thermal protector, lead wires, sockets, etc. The stator core of the plastic-sealed motor is made by splicing two semi-circular cores into a complete circle, and it is mainly used in electrical appliances such as air conditioners, dehumidifiers, range hoods, air purifiers, etc., with the advantages of small size and low noise.

[0003] In traditional plastic-sealed motors, including a rotating shaft, a rotor assembly, a plastic-sealed stator, and an end cover. The rotor assembly is installed on the rotating shaft. There is a cavity in the middle of the plastic-sealed stator, and the rotor assembly is installed inside the cavity of the plastic-sealed stator. The end cover is installed at the end of the plastic-sealed stator. The rotating shaft is supported on the bearings of the end cover. The PG board is placed on the plastic-sealed stator, and then the PG board is pressed and fixed on the plastic-sealed stator through the end cover. Generally, the end cover of the motor is installed on the plastic-sealed stator in an interference fit manner and fixed to the end of the plastic-sealed stator through fasteners such as bolts or pins to achieve the purpose of oil-proof seal.

[0004] However, when installing and removing the end cover by interference fit, during disassembly and repair, personnel need to use special tools to find a suitable prying point to pry the end cover from the end of the plastic-sealed stator. This is time-consuming and laborious for the disassembling personnel, very inconvenient, and easily causes damage to the surface of the end cover and the end of the plastic-sealed stator during the process. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a plastic-sealed motor with an oil-proof seal structure, which can facilitate personnel to install and remove the end cover.

[0006] The above technical purpose of the utility model is achieved through the following technical solutions: A plastic-sealed motor with an oil-proof seal structure includes a stator assembly and a rotor assembly passing through the middle of the stator assembly. There is an end cover seat on the stator assembly, and an end cover is arranged on the end cover seat. The end cover is sleeved outside the rotor assembly. A support ring is arranged on the end cover seat. An outer ring is rotatably arranged on one side of the end cover facing the end cover seat. A first thread is arranged on the support ring, and a second thread that is screwed and matched with the first thread is arranged on the outer ring. A knob is arranged on the outer wall of the outer ring.

[0007] Preferably, the outer diameter of the support ring is smaller than the inner diameter of the outer ring. The first thread is an external thread, and the second thread is an internal thread.

[0008] Preferably, a limiting component is further included. The limiting component includes a collar arranged on the outer wall of the outer ring and a ratchet sleeved on its outer wall. A support block is arranged outside the stator assembly, and a pawl cooperating with the ratchet is arranged on the support block.

[0009] Preferably, one end of the pawl is provided with a rotating rod. A sliding groove is formed in the support block along its height direction. A bottom plate is slidably arranged at the sliding groove. The rotating rod is rotatably connected to the bottom plate. A torsion spring is sleeved on the outer wall of the rotating rod. One end of the torsion spring is connected to the pawl, and the other end is connected to the bottom plate. A telescopic spring is arranged inside the sliding groove. One side of the bottom plate facing the sliding groove is connected to one end of the telescopic spring.

[0010] Preferably, a limiting plate is slidably arranged on one side of the support block, and one end of the limiting plate penetrates into the sliding groove.

[0011] Preferably, a sealing ring is arranged on the upper side of the support ring.

[0012] Advantages of the present utility model:

[0013] By arranging a support ring with thread one on the end cover seat, rotatably arranging an outer ring on the end cover, and arranging thread two on the outer ring that is screwed and matched with thread one, the end cover is installed on the end cover seat by using thread cooperation. A knob is arranged on the outer wall of the outer ring, which is convenient for personnel to load and unload the end cover and the end cover seat.

[0014] Compared with the prior art, the present utility model does not require interference fit between the end cover and the end of the plastic-sealed stator. Personnel do not need to pry or press the end cover into the end cover seat, reducing damage to the end cover and the end of the plastic-sealed stator. A sealing ring is arranged on the upper side of the outer ring, avoiding external impurities from entering the motor interior through the gap between the outer ring and the support ring. A ratchet is sleeved on the outer wall of the collar, and a pawl cooperating with the ratchet is arranged on the support block on the outer wall of the end cover seat, further avoiding the problem that the outer ring loosens and is not tightly screwed with the support ring due to some vibrations during the operation of the motor. Description of the drawings

[0015] Figure 1 is a schematic structural diagram for showing the external part of the end cover seat in an embodiment of the present utility model;

[0016] Figure 2 is a schematic diagram for showing some internal mechanisms of the motor in an embodiment of the present utility model;

[0017] Figure 3 is an exploded view for showing some internal mechanisms of the motor in an embodiment of the present utility model;

[0018] Figure 4 is Figure 3 an enlarged view of part A in

[0019] Figure 5 This is an exploded view for separately showing a part of the mechanism on the support block in an embodiment of the present utility model.

[0020] Reference numerals: 1, stator assembly; 2, rotor assembly; 3, end cover; 4, end cover seat; 5, support ring; 6, outer ring; 7, first thread; 8, second thread; 9, knob; 10, collar; 11, ratchet; 12, support block; 13, pawl; 14, rotating rod; 15, torsion spring; 16, bottom plate; 17, sliding groove; 18, telescopic spring; 19, limiting plate; 20, sealing ring. Specific embodiments

[0021] The following is only the preferred embodiment of the present utility model, and the protection scope is not limited to this embodiment. All technical solutions falling within the idea of the present utility model shall belong to the protection scope of the present utility model. At the same time, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and modifications should also be regarded as the protection scope of the present utility model.

[0022] It should be noted that in this text, relational terms such as first and second, such as "connecting plate one, connecting plate two", etc., are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0023] The orientation terms mentioned in this embodiment, such as "upper, lower, left, right", etc., are only used to assist those skilled in the art in understanding the connections between various features or parts in combination with each drawing.

[0024] In this embodiment, unless otherwise clearly defined and limited, terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. Unless otherwise clearly defined, for those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0025] Such as Figures 1 to 5As shown in the figure, an oil-proof sealed plastic-encased motor includes a stator assembly 1 and a rotor assembly 2 passing through the middle thereof. An end cover 3 seat recessed inward is provided on the stator assembly 1, and an end cover 3 is provided on the end cover 3 seat. The end cover 3 is sleeved on the outer wall of one end of the rotor assembly 2 extending out of the inside of the stator assembly 1. A support ring 5 is fixed on the upper outer wall of the end cover 3 seat. In this embodiment, a first thread 7 is provided on the outer wall of the support ring 5. A rotating outer ring 6 is rotatably provided under the end cover 3. The outer ring 6 is rotatably provided along the central axis of the end cover 3. A second thread 8 that is screwed and matched with the first thread 7 is provided on the inner wall of the outer ring 6, and a knob 9 is provided on the outer wall of the outer ring 6, aiming to facilitate personnel to rotate the outer ring 6.

[0026] In this embodiment, the outer diameter dimension of the support ring 5 is smaller than the inner diameter dimension of the outer ring 6. The first thread 7 is an external thread, and the second thread 8 is an internal thread. A collar 10 is provided on the outer wall of the outer ring 6 below the knob 9. A ratchet 11 is sleeved and fixed on the outer wall of the collar 10. A support block 12 is fixed on the upper outer wall of the stator assembly 1. The support block 12 is located below the ratchet 11. A sliding groove 17 is opened on the upper side of the support block 12 along its height direction. A bottom plate 16 is slidably provided up and down at the sliding groove 17. A telescopic spring 18 is vertically fixed inside the sliding groove 17. The lower end of the telescopic spring 18 is fixedly connected to the bottom end inside the sliding groove 17, and its upper end is fixedly connected to the lower side of the bottom plate 16. A rotating rod 14 is vertically provided on the bottom plate 16, and the rotating rod 14 rotates around its central axis. A pawl 13 that cooperates with the ratchet 11 is sleeved and fixed on the upper end of the rotating rod 14. A torsion spring 15 is sleeved on the outer wall of the rotating rod 14. The lower end of the torsion spring 15 is fixed to the upper side of the bottom plate 16, and its upper end is fixed to the lower side of the pawl 13. A T-shaped limiting plate 19 slides horizontally on the outer wall of the support block 12. One end of the limiting plate 19 penetrates into the sliding groove 17. A sealing ring 20 is embedded on the upper side of the support ring 5, aiming to suppress the sealing ring 20 under the lower side of the end cover 3 when the outer ring 6 moves downward, so as to play a certain sealing role in the end cover 3 seat.

[0027] When personnel need to install the end cover 3, the rotor assembly 2 sleeved with the end cover 3 is extended into the inside of the stator assembly 1, and at the same time, the end cover 3 moves downward synchronously into the end cover 3 seat. At this time, personnel rotate the knob 9 to drive the outer ring 6, so that the outer ring 6 is threadedly connected with the support ring 5 on the end cover 3 seat until the lower side of the end cover 3 presses the sealing ring 20 on the support ring 5. During the downward movement, the telescopic spring 18 is in an extended state, pushing the bottom plate 16 to move upward at the upper end of the sliding groove 17. The ratchet 11 on the collar 10 cooperates with the pawl 13. One end of the limiting plate 19 is located inside the sliding groove 17 and fits with the lower side of the bottom plate 16, so that the bottom plate 16 cannot move downward in the sliding groove 17. Thus, personnel can only drive the knob 9 to rotate in one direction, avoiding the subsequent self-rotation of the knob 9 due to force.

[0028] When personnel need to disassemble the end cover 3, first pull the limit plate 19 outwards so that the bottom plate 16 is no longer restricted by the limit plate 19. Then, the personnel press down the bottom plate 16 so that the pawl 13 disengages from the ratchet wheel 11. At this time, the personnel reverse the knob 9 to drive the outer ring 6 to separate from the support ring 5, making it convenient and fast for the personnel to disassemble.

[0029] The above embodiments are illustrative of the present utility model and not restrictive thereof. Any scheme obtained by simply transforming the present utility model falls within the protection scope of the present utility model.

Claims

1. An oil-proof sealed plastic-encased motor, comprising a stator assembly (1) and a rotor assembly (2) passing through the middle of the stator assembly (1). A end cover seat (4) is provided on the stator assembly (1), and an end cover (3) is provided on the end cover seat (4), and the end cover (3) is sleeved outside the rotor assembly (2). It is characterized in that A support ring (5) is provided on the end cover seat (4), and an outer ring (6) is rotatably provided on the side of the end cover (3) facing the end cover seat (4). A first thread (7) is provided on the support ring (5), a second thread (8) that is screwed and matched with the first thread (7) is provided on the outer ring (6), and a knob (9) is provided on the outer wall of the outer ring (6).

2. The oil-proof sealed plastic-encased motor according to claim 1, wherein The outer diameter of the support ring (5) is smaller than the inner diameter of the outer ring (6), the first thread (7) is an external thread, and the second thread (8) is an internal thread.

3. A plastic-sealed motor with an oil-proof seal, characterized in that, It further includes a limiting component. The limiting component includes a collar (10) provided on the outer wall of the outer ring (6) and a ratchet wheel (11) sleeved on its outer wall. A support block (12) is provided outside the stator assembly (1), and a ratchet pawl (13) that cooperates with the ratchet wheel (11) is provided on the support block (12).

4. The oil-proof sealed plastic-encased motor according to claim 3, characterized in that, One end of the ratchet pawl (13) is provided with a rotating rod (14). A sliding groove (17) is opened in the support block (12) along its height direction. A bottom plate (16) is slidably provided at the sliding groove (17). The rotating rod (14) is rotatably connected to the bottom plate (16). A torsion spring (15) is sleeved on the outer wall of the rotating rod (14). One end of the torsion spring (15) is connected to the ratchet pawl (13), and the other end is connected to the bottom plate (16). A telescopic spring (18) is provided inside the sliding groove (17), and one end of the telescopic spring (18) is connected to the side of the bottom plate (16) facing the sliding groove (17).

5. The oil-proof sealed plastic-encased motor according to claim 4, wherein, A limiting plate (19) is slidably provided on one side of the support block (12), and one end of the limiting plate (19) penetrates into the sliding groove (17).

6. The oil-proof sealed plastic-encased motor according to claim 1, characterized in that, A sealing ring (20) is provided above the support ring (5).

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