Sealed leak-proof permanent magnet oil pump motor

Abstract

This utility model relates to the field of automotive permanent magnet oil pump motor technology, specifically a sealed, leak-proof permanent magnet oil pump motor, including a permanent magnet oil pump motor body, with an output shaft internally connected to the motor body; it also includes a sealing assembly for sealing the output shaft and the protruding end of the permanent magnet oil pump motor body. Through the sealing assembly, when sealing the gap between the output shaft and the permanent magnet oil pump motor body, manually pulling the insert rod overcomes the spring force of the fixing spring and disengages from the groove, releasing the turntable lock; rotating the turntable causes the arc-shaped groove to push the slide rod radially inward, driving the connecting plate to move inward along the fixing ring, pulling the fixing rod to close the symmetrical movable ring; the movable ring squeezes the elastic rubber connecting ring, causing the sealing ring to tighten evenly and fit against the output shaft, forming an annular sealing surface, blocking oil leakage, preventing motor corrosion, short circuits, and demagnetization of the permanent magnet, improving sealing reliability and stability, and extending motor life.

Description

Technical Field

[0001] This utility model relates to the technical field of automotive permanent magnet oil pump motors, specifically a sealed, leak-proof permanent magnet oil pump motor. Background Technology

[0002] With the rapid popularization of new energy vehicles, automobiles powered by new energy sources such as plug-in hybrid, pure electric, and fuel cell vehicles are widely used. This places increasingly stringent requirements on the sealing performance, leak-proof capability, reliability, and durability of the hydraulic pump motor in the vehicle's hydraulic auxiliary system. Due to its advantages such as high efficiency, energy saving, fast response, and high power density, the permanent magnet oil pump motor has become a core power component of the hydraulic system in new energy vehicles.

[0003] However, during long-term operation, some permanent magnet oil pump motors develop a high-pressure oil chamber inside the pump cavity. Under the influence of the high pressure difference, the high-pressure oil will seep from the pump side to the motor side along the tiny annular gap between the output shaft and the motor body end cover. At the same time, the high-speed rotation of the output shaft generates a pumping effect, which eventually leads to the continuous seepage of oil into the motor, causing motor corrosion, insulation degradation, winding short circuits, and permanent magnet demagnetization. This seriously affects the normal operation of the motor, shortens its service life, reduces the output pressure of the oil pump, affects the accuracy of the hydraulic system, increases maintenance costs, and poses safety hazards.

[0004] In view of this, we propose a sealed, leak-proof permanent magnet oil pump motor. Utility Model Content

[0005] The purpose of this utility model is to provide a sealed, leak-proof permanent magnet oil pump motor, which solves the problems of poor sealing reliability of the output shaft end of existing permanent magnet oil pump motors and easy leakage of high-pressure oil along the shaft end gap.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A sealed, leak-proof permanent magnet oil pump motor includes a permanent magnet oil pump motor body, with an output shaft internally connected to the permanent magnet oil pump motor body; it also includes a sealing assembly for sealing the output shaft and the protruding end of the permanent magnet oil pump motor body; and a limiting assembly for limiting the sealing assembly during use.

[0008] The sealing assembly includes: a fixed ring disposed on the surface of the permanent magnet oil pump motor body; a turntable rotatably connected to the inner side of the fixed ring; a sliding rod slidably connected inside the turntable; a connecting plate hinged to the surface of the sliding rod; the connecting plate passing through the fixed ring; a fixed rod connected to the surface of the connecting plate; a movable ring mounted on the surface of the fixed rod; a connecting ring slidably connected inside the movable ring; and a sealing ring installed inside the connecting ring.

[0009] Preferably, a control block is installed on the outer wall of the turntable, a rod passes through the inside of the control block, a fixing spring is installed on the surface of the rod, and the fixing spring is installed on the outer wall of the control block.

[0010] Preferably, the turntable surface has an arc-shaped groove, the fixing ring surface has multiple sets of grooves, and the insertion rod is inserted into the inside of the groove.

[0011] Preferably, there are two movable rings, and both movable rings are symmetrically arranged with the center line of the turntable as the axis of symmetry. The cross-section of the two movable rings is circular after being spliced ​​together by a connecting ring.

[0012] Preferably, the limiting component includes: a limiting ring, the limiting ring being mounted on the surface of the permanent magnet oil pump motor body, a limiting block being mounted on the inner side of the limiting ring, a fixing ring being mounted on the surface of the limiting ring, a slider being slidably connected inside the limiting ring, a swing block being hinged to the inner side of the slider, a torsion spring being slidably connected to the outer wall of the swing block, and the torsion spring being mounted on the inner side of the limiting ring.

[0013] Preferably, a return spring is mounted on the surface of the slider, and the return spring is mounted on the inner wall of the limiting ring.

[0014] Preferably, a rotating ring is installed on the outer wall of the turntable, a driving block is installed on the outer wall of the rotating ring, and the rotating ring is disposed inside the limiting ring.

[0015] By employing the above technical solution, this utility model provides a sealed, leak-proof permanent magnet oil pump motor. It possesses at least the following beneficial effects:

[0016] (1) By setting the sealing component, when sealing the gap between the output shaft and the permanent magnet oil pump motor body, the manual pull rod can overcome the spring force of the fixed spring and disengage from the groove, thus releasing the turntable lock; rotating the turntable, the arc groove pushes the slide rod to move radially inward, which drives the connecting plate to move inward along the fixed ring, and pulls the fixed rod to make the symmetrical movable ring close; the movable ring squeezes the connecting ring made of elastic rubber material, so that the sealing ring is evenly tightened and fits the output shaft to form an annular sealing surface, blocking oil leakage, preventing motor corrosion, short circuit and permanent magnet demagnetization, improving sealing reliability and stability, and extending motor life.

[0017] (2) By setting the limiting component, when the turntable rotates to seal, the rotating ring drives the driving block to rotate, the driving block contacts and presses down on the swing block, and passes smoothly after compressing the torsion spring; when the rotating ring rotates in the opposite direction, the driving block is stopped by the reset swing block, and the rebound force of the torsion spring and the limiting block lock the swing block together, limiting the turntable to rotate; when unlocking, press the slider to drive the swing block to move down and get out of the stop, release the reverse limit, and the turntable can rotate in the opposite direction to prevent the seal from loosening, ensure that the sealing ring is effectively tightened, and improve the reliability, stability and anti-leakage capability of the motor seal. Attached Figure Description

[0018] The accompanying drawings, which are included to provide a further understanding of the present invention, form part of this application:

[0019] Figure 1 This is a schematic diagram of the overall front view of the present invention;

[0020] Figure 2 This is a schematic diagram of the connection structure of the sealing component and the limiting component in this utility model;

[0021] Figure 3 This is a front view schematic diagram of the sealing component in this utility model;

[0022] Figure 4 This is a side view of the insert rod structure in this utility model;

[0023] Figure 5 This is a front view structural diagram of the limiting component in this utility model.

[0024] In the diagram: 1. Permanent magnet oil pump motor body; 2. Output shaft; 3. Sealing assembly; 4. Restriction assembly; 31. Fixed ring; 32. Turntable; 33. Slide rod; 34. Connecting plate; 35. Fixed rod; 36. Moving ring; 37. Connecting ring; 38. Sealing ring; 39. Control block; 310. Insert rod; 311. Fixed spring; 320. Arc groove; 3100. Groove; 41. Restriction ring; 42. Restriction block; 43. Slider; 44. Swing block; 45. Torsion spring; 46. Return spring; 47. Rotary ring; 48. Drive block. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example 1

[0027] A sealed, leak-proof permanent magnet oil pump motor, such as Figure 1 - Figure 4 As shown, it includes a permanent magnet oil pump motor body 1, and an output shaft 2 is connected inside the permanent magnet oil pump motor body 1;

[0028] It also includes a sealing assembly 3, which is used to seal the output shaft 2 and the protruding end of the permanent magnet oil pump motor body 1;

[0029] Restriction component 4 is used to restrict the sealing component 3 during use;

[0030] First, the sealing assembly 3 includes: a fixed ring 31, which is disposed on the surface of the permanent magnet oil pump motor body 1; a turntable 32 is rotatably connected to the inner side of the fixed ring 31; a slide rod 33 is slidably connected inside the turntable 32; a connecting plate 34 is hinged to the surface of the slide rod 33; the connecting plate 34 passes through the fixed ring 31; a fixed rod 35 is connected to the surface of the connecting plate 34; a movable ring 36 is mounted on the surface of the fixed rod 35; a connecting ring 37 is slidably connected inside the movable ring 36; and a sealing ring 38 is installed inside the connecting ring 37. The fixed ring 31 provides a stable installation reference for the sealing assembly 3. The turntable 32 can rotate flexibly inside the fixed ring 31, driving the slide rod 33 to slide radially. The slide rod 33 is linked to the connecting plate 34 to move linearly through the fixed ring 31. The connecting plate 34 drives the fixed rod 35 and the movable ring 36 to move synchronously. The movable ring 36 and the connecting ring 37 slide together, ultimately allowing the sealing ring 38 to precisely tighten or loosen the output shaft 2, realizing the sealing and de-sealing of the shaft end gap, ensuring the overall linkage reliability and synchronous operation of the sealing assembly 3.

[0031] Secondly, a control block 39 is installed on the outer wall of the turntable 32. A rod 310 passes through the inside of the control block 39. A fixing spring 311 is installed on the surface of the rod 310. The fixing spring 311 is installed on the outer wall of the control block 39. The control block 39 fixes the installation position of the rod 310. The fixing spring 311 provides elastic restoring force for the rod 310, so that the rod 310 can extend and retract flexibly. This enables the turntable 32 to be quickly locked and unlocked, preventing the turntable 32 from loosening and rotating due to vibration during motor operation, and ensuring the stability of the position of the sealing component 3 after adjustment.

[0032] Furthermore, the surface of the turntable 32 is provided with an arc-shaped groove 320, and the surface of the fixing ring 31 is provided with multiple sets of grooves 3100. The insertion rod 310 is inserted into the inside of the groove 3100. The arc-shaped groove 320 guides the sliding rod 33 to slide radially, so as to realize the smooth transition of the turntable 32 from rotation to sealing and tightening action. The multiple sets of grooves 3100 cooperate with the insertion rod 310 to lock multiple angle positions of the turntable 32, so as to realize the graded and precise adjustment of the sealing clamping force and adapt to the sealing requirements under different working conditions.

[0033] Furthermore, there are two movable rings 36, and both movable rings 36 are symmetrically arranged with the center line of the turntable 32 as the axis of symmetry. The cross-section of the two movable rings 36 is circular after being spliced ​​by the connecting ring 37. The two movable rings 36 are symmetrically arranged so that the clamping force is evenly distributed in the circumference. With the radial expansion and contraction characteristics of the elastic connecting ring 37, the sealing ring 38 can be evenly squeezed to avoid uneven local force, which may lead to uneven sealing or leakage. This ensures that the inner wall of the sealing ring 38 fits tightly with the outer circle of the output shaft 2 and the circumferential sealing is uniform.

[0034] In this embodiment, by setting the sealing component 3, when sealing the gap between the output shaft 2 and the permanent magnet oil pump motor body 1, the manual pull rod 310 is pulled outward to overcome the elastic force of the fixed spring 311 and disengage from the groove 3100, releasing the lock of the turntable 32; rotating the turntable 32, the arc groove 320 pushes the slide rod 33 to move radially inward, driving the connecting plate 34 to move inward along the fixed ring 31, pulling the fixed rod 35 to make the symmetrical movable ring 36 close; the movable ring 36 squeezes the elastic rubber connecting ring 37, so that the sealing ring 38 is evenly tightened and fits the output shaft 2, forming an annular sealing surface, blocking oil leakage, preventing motor corrosion, short circuit and permanent magnet demagnetization, improving sealing reliability and stability, and extending motor life.

[0035] Example 2

[0036] like Figure 5 As shown, the limiting component 4 includes: a limiting ring 41, which is mounted on the surface of the permanent magnet oil pump motor body 1; a limiting block 42 is mounted on the inner side of the limiting ring 41; a fixing ring 31 is mounted on the surface of the limiting ring 41; a slider 43 is slidably connected inside the limiting ring 41; a swing block 44 is hinged to the inner side of the slider 43; a torsion spring 45 is slidably connected to the outer wall of the swing block 44; and the torsion spring 45 is mounted on the inner side of the limiting ring 41.

[0037] Furthermore, a return spring 46 is installed on the surface of the slider 43. The return spring 46 is installed on the inner wall of the limiting ring 41. The return spring 46 provides a continuous outward elastic force to the slider 43, so that the slider 43 is kept in the reset state under normal conditions. This drives the swing block 44 to stably block the drive block 48, ensuring that the limiting component 4 is reliably limited under normal conditions. When unlocking, the slider 43 can overcome the elastic force and move inward, so as to quickly release the limit and make the action sensitive and smooth.

[0038] Finally, a rotating ring 47 is installed on the outer wall of the turntable 32, and a driving block 48 is installed on the outer wall of the rotating ring 47. The rotating ring 47 is located inside the limiting ring 41. The rotating ring 47 rotates synchronously with the turntable 32, driving the driving block 48 to move circumferentially. The driving block 48 cooperates with the swing block 44 to achieve the effect of forward rotation for release and reverse rotation for blocking by the limiting block 42.

[0039] In this embodiment, by setting the limiting component 4, when the turntable 32 rotates to seal, the rotating ring 47 drives the driving block 48 to rotate. The driving block 48 contacts and presses down on the swing block 44, and smoothly passes over it after compressing the torsion spring 45. When the rotating ring 47 rotates in the opposite direction, the driving block 48 is stopped by the reset swing block 44. The rebound force of the torsion spring 45 and the limiting block 42 lock the swing block 44 together, limiting the rotation of the turntable 32. When unlocking, pressing the slider 43 drives the swing block 44 to move down and disengage from the stop, releasing the reverse limit. The turntable 32 can rotate in the opposite direction to prevent the seal from loosening, ensure that the sealing ring 38 is effectively tightened, and improve the reliability, stability and anti-leakage capability of the motor seal.

[0040] Working principle: The permanent magnet oil pump motor body 1 drives the oil pump through the output shaft 2. The high-pressure oil in the oil pump is prone to leaking inward along the gap between the output shaft 2 and the permanent magnet oil pump motor body 1. Therefore, a sealing component 3 is set at the output shaft outlet for radial sealing, and the sealing component 3 is locked and positioned by the limiting component 4 to prevent vibration from loosening and achieve bidirectional anti-leakage.

[0041] When sealing the gap between the output shaft 2 and the permanent magnet oil pump motor body 1, the insert rod 310 can be manually pulled to overcome the elastic force of the fixed spring 311 and disengage it from the groove 3100, thus releasing the lock of the turntable 32. Then, the turntable 32 is rotated. When the turntable 32 rotates, the arc groove 320 pushes the slide rod 33 to slide radially. The slide rod 33 moves smoothly inward along the internal channel of the turntable 32, simultaneously driving the connecting plate 34 hinged at its end to move radially inward along the fixed ring 31. The connecting plate 34 passes through the fixed ring 31 and drives the outer fixed rod 35 to move closer simultaneously. The two fixed rods 35 pull the symmetrically arranged movable rings 36 respectively, so that the two movable rings 36 precisely retract radially along the outer wall of the connecting ring 37. During the retraction process, the movable rings 36 squeeze the connecting ring 37, and the connecting ring 37 is made of elastic rubber material, so that the inner part of the connecting ring 37... The sealing ring 38 is tightened evenly, and the inner wall of the sealing ring 38 is tightly attached to the outer circular surface of the output shaft 2, forming a continuous and uniform annular sealing surface. This completely seals the gap between the output shaft 2 and the permanent magnet oil pump motor body 1, effectively blocking the path of high-pressure oil leakage into the pump through the gap, completing the sealing operation, preventing internal corrosion of the motor, short circuit of the windings, and demagnetization of the permanent magnet caused by oil leakage, improving the sealing reliability and operational stability of the permanent magnet oil pump motor, and extending the service life of the motor. After adjusting the clamping force of the sealing ring 38 to a suitable level, the insertion rod 310 is released, the fixing spring 311 is reset, and the insertion rod 310 is pushed back into the corresponding groove 3100 on the fixing ring 31, locking the position of the turntable 32 again, preventing the turntable 32 from rotating and the seal from loosening due to vibration during motor operation, and ensuring long-term stable and reliable sealing effect.

[0042] When the turntable 32 needs to seal the gap between the output shaft 2 and the permanent magnet oil pump motor body 1, the rotating ring 47 also drives the drive block 48 to rotate synchronously. When the rotating ring 47 rotates, it also drives the drive block 48 to first contact the swing block 44 and abut against the swing block 44, causing the swing block 44 to swing downward and compress the torsion spring 45. When the swing block 44 swings downward, the drive block 48 will smoothly pass over the swing block 44. However, when the rotating ring 47 is affected by vibration and rotates in the opposite direction, the rotation of the drive block 48 will be blocked by the swing block 44 and cannot rotate back, thus restricting the reverse rotation of the turntable 32. The drive block 48 will directly abut against the reset swing block 44. The swing block 44 is subjected to the rebound force of the torsion spring 45 and swings. Block 44 is restricted and locked by block 42 to prevent it from swinging in the opposite direction, and the drive block 48 cannot rotate. This rigidly restricts the rotating ring 47 and the turntable 32 from rotating in the opposite direction. When it is necessary to release the seal lock, simply press the slider 43 inward manually. When the slider 43 slides, it will drive the swing block 44 to slide, so that the swing block 44 does not form a locking engagement with the drive block 48 in the circumferential direction, thereby releasing the reverse limit on the drive block 48, the rotating ring 47 and the turntable 32. The turntable 32 can then rotate in the opposite direction to complete the seal unlocking, prevent the sealing component 3 from loosening, ensure that the sealing ring 38 always remains in an effective clamping state, prevent oil leakage, and improve the sealing reliability, operating stability and anti-leakage capability of the permanent magnet oil pump motor body 1.

[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0044] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sealed, leak-proof permanent magnet oil pump motor, comprising a permanent magnet oil pump motor body (1), characterized in that: The permanent magnet oil pump motor body (1) is internally connected to an output shaft (2); It also includes a sealing assembly (3) for sealing the output shaft (2) and the protruding end of the permanent magnet oil pump motor body (1); A limiting component (4) is used to restrict the sealing component (3) during use; The sealing assembly (3) includes: a fixed ring (31), which is disposed on the surface of the permanent magnet oil pump motor body (1). A turntable (32) is rotatably connected to the inner side of the fixed ring (31). A slide rod (33) is slidably connected inside the turntable (32). A connecting plate (34) is hinged to the surface of the slide rod (33). The connecting plate (34) passes through the fixed ring (31). A fixed rod (35) is connected to the surface of the connecting plate (34). A movable ring (36) is installed on the surface of the fixed rod (35). A connecting ring (37) is slidably connected inside the movable ring (36). A sealing ring (38) is installed inside the connecting ring (37).

2. The sealed, leak-proof permanent magnet oil pump motor according to claim 1, characterized in that: A control block (39) is installed on the outer wall of the turntable (32). A rod (310) passes through the inside of the control block (39). A fixing spring (311) is installed on the surface of the rod (310). The fixing spring (311) is installed on the outer wall of the control block (39).

3. The sealed, leak-proof permanent magnet oil pump motor according to claim 2, characterized in that: The turntable (32) has an arc groove (320) on its surface, and the fixing ring (31) has multiple grooves (3100) on its surface. The insert rod (310) is inserted into the inside of the groove (3100).

4. The sealed, leak-proof permanent magnet oil pump motor according to claim 1, characterized in that: There are two movable rings (36), and both movable rings (36) are symmetrically arranged with the center line of the turntable (32) as the axis of symmetry. The cross-section of the two movable rings (36) is circular after being spliced ​​together by the connecting ring (37).

5. The sealed, leak-proof permanent magnet oil pump motor according to claim 1, characterized in that: The limiting component (4) includes: a limiting ring (41), which is mounted on the surface of the permanent magnet oil pump motor body (1), a limiting block (42) is mounted on the inner side of the limiting ring (41), a fixing ring (31) is mounted on the surface of the limiting ring (41), a slider (43) is slidably connected inside the limiting ring (41), a swing block (44) is hinged on the inner side of the slider (43), and a torsion spring (45) is slidably connected on the outer wall of the swing block (44), and the torsion spring (45) is mounted on the inner side of the limiting ring (41).

6. The sealed, leak-proof permanent magnet oil pump motor according to claim 5, characterized in that: A reset spring (46) is mounted on the surface of the slider (43), and the reset spring (46) is mounted on the inner wall of the limiting ring (41).

7. The sealed, leak-proof permanent magnet oil pump motor according to claim 5, characterized in that: A rotating ring (47) is installed on the outer wall of the turntable (32), and a driving block (48) is installed on the outer wall of the rotating ring (47). The rotating ring (47) is located inside the limiting ring (41).

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