An electric compressor

Abstract

The application belongs to the technical field of electric compressor, and discloses an electric compressor, which comprises a shell with a motor and a compressor, a driving shaft of the motor is connected with a driven shaft of the compressor through a one-way transmission unit; an inner shell and a mounting column are fixed on the motor shell, and at least one auxiliary unit is arranged in the shell; the auxiliary unit comprises a pinion, a clamping mechanism, an inner ring gear, a spiral spring and a positioning locking mechanism; the pinion is rotatably arranged on the driving shaft and is engaged with the inner ring gear; the clamping mechanism is used for clamping the driving shaft and the pinion; the inner ring gear is fixed with the inner shell through the spiral spring, and the inner ring gear has a ring body part; the positioning locking mechanism is used for engaging the inner ring gear with the pinion and locking the inner ring gear; through the auxiliary unit, the driving shaft can first drive the auxiliary unit to accumulate force, and then the auxiliary unit can assist the driving shaft, so that the load required when the electric compressor starts can be reduced.

Description

Technical Field

[0001] This invention belongs to the field of electric compressor technology, specifically an electric compressor. Background Technology

[0002] During the operation of an electric compressor, the start-up of the electric compressor requires a large short-term output, which generates a large current in the motor inside the electric compressor, resulting in a large load. If the large load is sustained for a long time, it can easily damage the motor. Therefore, there is a need to provide an electric compressor that can reduce the load required for start-up. Summary of the Invention

[0003] In view of the above situation and to overcome the shortcomings of the prior art, the present invention provides an electric compressor that effectively solves the problem of needing to provide an electric compressor that can reduce the load required for startup.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an electric compressor, comprising a housing having an electric motor and a compressor, wherein the drive shaft of the electric motor and the driven shaft of the compressor are connected by a one-way transmission unit; an inner shell and a mounting post are fixed on the outer shell of the electric motor, and at least one auxiliary unit is provided inside the housing; the auxiliary unit includes a pinion, a snap-fit ​​mechanism, an internal gear ring, a spiral spring, and a positioning and locking mechanism; the pinion is rotatably mounted on the drive shaft and meshes with the internal gear ring, the snap-fit ​​mechanism is used to snap the drive shaft with the pinion, the internal gear ring is fixed to the inner shell by the spiral spring, and the internal gear ring has a ring body portion, and the positioning and locking mechanism is used to mesh the internal gear ring with the pinion and to lock the internal gear ring.

[0005] Preferably, the unidirectional transmission unit includes an upper wheel body and a lower wheel body. The upper wheel body is fixed to the driven shaft and has a ratchet groove inside. The lower wheel body is fixed to the drive shaft and has a mounting groove inside. A pawl is hinged in the mounting groove and works in conjunction with the ratchet groove. A torsion spring is provided at the hinge point between the pawl and the ratchet groove.

[0006] Preferably, the locking mechanism includes a locking block, a tension spring, and a hydraulic component. The drive shaft has a groove and a connecting groove that are connected to each other. The locking block is slidably disposed in the groove and fixed to the groove by the tension spring. The hydraulic component drives the locking block to lock with the groove on the pinion by hydraulic pressure.

[0007] Preferably, the hydraulic component includes a mounting cylinder, an annular shell, a vertical electric push rod, and a vertical piston. The mounting cylinder is fixed to the motor housing and integrated with the annular shell. The annular shell is rotatably sealed to the drive shaft. The vertical electric push rod is fixed inside the mounting cylinder. The vertical piston is fixed to the output end of the vertical electric push rod. The vertical piston is slidably sealed to the mounting cylinder. The mounting cylinder is connected to the connecting groove through the annular shell.

[0008] Preferably, the positioning and locking mechanism includes multiple positioning and locking components, which are distributed circumferentially along the mounting column; each positioning and locking component includes a positioning element and a locking element.

[0009] Preferably, the positioning component includes a horizontal electric push rod, a horizontal piston, a positioning rod, a mounting plate, and a positioning wheel. The mounting column is provided with multiple circumferentially distributed inner grooves. The horizontal electric push rod is fixed in the inner groove. The horizontal piston is fixed on the output end of the horizontal electric push rod. The horizontal piston is slidably sealed with the inner groove. The positioning rod is slidably sealed in the inner groove. The positioning rod is fixedly set with the mounting plate. The positioning wheel is rotatably set on the mounting plate. The positioning wheel is used in conjunction with the ring body.

[0010] Preferably, the locking component includes a locking rod, a telescopic spring, and a locking block. The positioning rod has a central hole, the locking rod is slidably sealed in the central hole, the telescopic spring is wrapped around the locking rod, the locking rod is movably engaged with a through hole on the mounting plate, and the locking block is fixed on the locking rod.

[0011] Preferably, an annular plate is fixed on the inner shell, and the number of annular plates corresponds one-to-one with the number of auxiliary units; the spiral spring and internal gear ring in the auxiliary unit are both located above the annular plate.

[0012] Compared with the prior art, the beneficial effects of the present invention are: 1. During operation, the auxiliary unit can be set up so that the drive shaft can first drive the auxiliary unit to store power, and then the auxiliary unit can assist the drive shaft to reduce the load required when the electric compressor starts.

[0013] 2. During operation, the multiple auxiliary units can be configured to store power for each auxiliary unit via the drive shaft, thereby enabling the multiple auxiliary units to work together to assist the drive shaft and further reduce the load required for the electric compressor to start. Attached Figure Description

[0014] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0015] In the attached diagram: Figure 1 This is a schematic diagram of an electric compressor structure according to the present invention; Figure 2 This is a schematic diagram of the internal structure of the housing of the present invention; Figure 3 This is a schematic diagram of the inner shell mounting structure of the present invention; Figure 4 This is a schematic diagram of the internal structure of the inner shell of the present invention; Figure 5 For the present invention Figure 4 A schematic diagram of the longitudinal sectional structure in the middle; Figure 6 This is a schematic diagram of the unidirectional transmission unit structure of the present invention; Figure 7 This is a schematic diagram of the drive shaft mounting structure of the present invention; Figure 8 For the present invention Figure 7 Schematic diagram of the mid-longitudinal section structure; Figure 9 This is a schematic cross-sectional view of the mounting column of the present invention; Figure 10 For the present invention Figure 9 Enlarged structural diagram at point A in the middle; Figure 11 This is a schematic diagram of the internal gear ring structure of the present invention; Figure 12 This is a schematic diagram of the internal structure of the locking rod of the present invention.

[0016] In the diagram: 1. Housing; 2. Motor; 3. Compressor; 4. Drive shaft; 5. Driven shaft; 6. Inner housing; 7. Mounting column; 8. Pinion; 9. Internal gear ring; 10. Spiral spring; 11. Ring body; 12. Upper wheel body; 13. Lower wheel body; 14. Ratchet; 15. Mounting groove; 16. Pawl; 17. Locking block; 18. Tension spring; 19. Groove; 20. Connecting groove; 21. Mounting cylinder; 22. Annular housing; 23. Vertical electric push rod; 24. Vertical piston; 25. Horizontal electric push rod; 26. Horizontal piston; 27. Positioning rod; 28. Mounting plate; 29. ​​Positioning wheel; 30. Inner groove; 31. Locking rod; 32. Telescopic spring; 33. Locking block; 34. Center hole; 35. Annular plate; 36. Locking groove. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0018] During the operation of an electric compressor, the start-up of the electric compressor requires a large short-term output, which generates a large current in the motor inside the electric compressor, resulting in a large load. If the large load is sustained for a long time, it can easily damage the motor. Therefore, there is a need to provide an electric compressor that can reduce the load required for start-up.

[0019] Depend on Figures 1-12The present invention relates to an electric compressor, comprising a housing 1 having an electric motor 2 and a compressor 3, wherein the drive shaft 4 of the electric motor 2 and the driven shaft 5 of the compressor 3 are connected by a one-way transmission unit; an inner housing 6 and a mounting post 7 are fixed on the outer housing of the electric motor 2, and at least one auxiliary unit is provided inside the housing 1; the auxiliary unit includes a pinion 8, a snap-fit ​​mechanism, an internal gear ring 9, a spiral spring 10, and a positioning and locking mechanism; the pinion 8 is rotatably mounted on the drive shaft 4 and meshes with the internal gear ring 9; the snap-fit ​​mechanism is used to snap the drive shaft 4 with the pinion 8; the internal gear ring 9 is fixed to the inner housing 6 by the spiral spring 10, and the internal gear ring 9 has a ring portion 11; the positioning and locking mechanism is used to mesh the internal gear ring 9 with the pinion 8 and to lock the internal gear ring 9.

[0020] With this design, during use, the scroll spring 10 is first driven by the drive shaft 4 of the motor 2 to store force. The specific process is as follows: When the spiral spring 10 needs to store power, the drive shaft 4 is engaged with the pinion 8 through the snap-fit ​​mechanism, and the internal gear ring 9 is engaged with the pinion 8 through the positioning and locking mechanism. The drive shaft 4 drives the spiral spring 10 to store power through the pinion 8 and the internal gear ring 9. Then the positioning and locking mechanism locks the internal gear ring 9. During this period, the driven shaft 5 does not rotate, thus completing the power storage process of the spiral spring 10 in a single auxiliary unit.

[0021] When the drive shaft 4 needs to be assisted by the spiral spring 10 to drive the driven shaft 5 to rotate, the locking mechanism releases the lock on the internal gear ring 9. After the stored force of the spiral spring 10 is released, the internal gear ring 9 rotates. The internal gear ring 9 assists the drive shaft 4 to rotate through the pinion 8. The drive shaft 4 drives the driven shaft 5 through the one-way transmission unit, thereby realizing the assisted start of the drive shaft 4.

[0022] After the power assist is completed, the drive shaft 4 is disengaged from the pinion 8 by the snap-fit ​​mechanism, and the positioning locking mechanism is released from locking the internal gear ring 9. Then, under the action of the spiral spring 10, the internal gear ring 9 disengages from the pinion 8.

[0023] It should be noted that the unidirectional transmission unit enables the drive shaft 4 to drive the driven shaft 5 to rotate in one direction, but not in the opposite direction. This allows the drive shaft 4 to drive the auxiliary unit when rotating in the opposite direction, thus achieving the energy storage process. Furthermore, multiple auxiliary units can be set according to actual needs. In this electric compressor, there are two auxiliary units. In this way, the drive shaft 4 can drive the scroll spring 10 in each auxiliary unit to store energy. After energy storage is completed, the scroll springs 10 in multiple auxiliary units can work together to assist the drive shaft 4 in rotating, thereby reducing the load on the drive shaft 4 when driving the driven shaft 5.

[0024] Specifically, the one-way transmission unit includes an upper wheel body 12 and a lower wheel body 13. The upper wheel body 12 is fixed to the driven shaft 5, and a ratchet groove 14 is provided inside the upper wheel body 12. The lower wheel body 13 is fixed to the drive shaft 4, and a mounting groove 15 is provided inside the lower wheel body 13. A pawl 16 is hinged in the mounting groove 15. The pawl 16 and the ratchet groove 14 are used in conjunction. A torsion spring is provided at the hinge point between the pawl 16 and the ratchet groove 14.

[0025] With this design, the principle of the one-way transmission unit is actually the same as that of the ratchet mechanism. Specifically, when the drive shaft 4 drives the lower wheel body 13 to rotate, when the pawl 16 is blocked by the ratchet groove 14, the lower wheel body 13 can drive the ratchet groove 14 on the upper wheel body 12 to move through the pawl 16, so that the upper wheel body 12 drives the driven shaft 5 to rotate. Conversely, the pawl 16 will not be blocked by the ratchet groove 14, so it cannot drive the upper wheel body 12 to rotate, that is, it cannot drive the driven shaft 5 to rotate.

[0026] Specifically, the locking mechanism includes a locking block 17, a tension spring 18, and a hydraulic component. The drive shaft 4 has a groove 19 and a connecting groove 20 that are connected to each other. The locking block 17 is slidably disposed in the groove 19 and fixed to the groove 19 by the tension spring 18. The hydraulic component drives the locking block 17 to engage with the locking groove 36 on the pinion 8 by hydraulic pressure.

[0027] This design allows liquid to enter the groove 19 through the connecting groove 20 via hydraulic components, which then compresses the locking block 17, causing it to extend out of the groove 19 and engage with the slot 36 on the pinion 8. At this time, the tension spring 18 is under tension, and the drive shaft 4 can drive the slot 36 on the pinion 8 through the locking block 17, causing the pinion 8 to rotate. When it is necessary to release the engagement between the locking block 17 and the slot 36, the liquid in the connecting groove 20 is simply extracted by hydraulic components. Under the action of negative pressure and the tension spring 18, the locking block 17 retracts into the groove 19, releasing the engagement between the drive shaft 4 and the pinion 8.

[0028] It should be noted that the liquid can be hydraulic oil or gas.

[0029] Specifically, the hydraulic components include a mounting cylinder 21, an annular shell 22, a vertical electric push rod 23, and a vertical piston 24. The mounting cylinder 21 is fixed to the housing of the motor 2 and is integrated with the annular shell 22. The annular shell 22 is rotatably sealed to the drive shaft 4. The vertical electric push rod 23 is fixed inside the mounting cylinder 21. The vertical piston 24 is fixed to the output end of the vertical electric push rod 23. The vertical piston 24 is slidably sealed to the mounting cylinder 21. The mounting cylinder 21 is connected to the connecting groove 20 through the annular shell 22.

[0030] With this design, during use, the vertical electric push rod 23 drives the vertical piston 24 to move. During the movement, the vertical piston 24 acts on the liquid in the mounting cylinder 21. The liquid is located between the top wall of the mounting cylinder 21 and the vertical piston 24, so that the liquid enters the connecting groove 20 after passing through the annular shell 22, so that the state of the locking block 17 can be controlled by hydraulic means.

[0031] Specifically, the positioning and locking mechanism includes multiple positioning and locking components, which are distributed circumferentially along the mounting post 7; each positioning and locking component includes a positioning element and a locking element.

[0032] In this design, initially, the spiral spring 10 is not engaged with the pinion 8. The positioning process of the internal gear ring 9 is achieved through the positioning elements within the multiple positioning and locking components. After positioning, the internal gear ring 9 engages with the pinion 8. When the spiral spring 10 has completed its power storage and needs to be locked, the locking elements within the positioning and locking components can be used to lock the internal gear ring 9 to ensure the power storage state of the spiral spring 10. When the spiral spring 10 needs to release its power, the locking elements can be released from the internal gear ring 9. At this time, under the action of the spiral spring 10, the internal gear ring 9 rotates. The internal gear ring 9 drives the drive shaft 4 to rotate through the pinion 8, thereby achieving the power-assisted process. After the power-assisted process is completed, the positioning elements return to their original positions and release the engagement between the drive shaft 4 and the pinion 8. At this time, under the action of the spiral spring 10, the internal gear ring 9 disengages from the pinion 8.

[0033] Specifically, the positioning components include a horizontal electric push rod 25, a horizontal piston 26, a positioning rod 27, a mounting plate 28, and a positioning wheel 29. The mounting column 7 is provided in multiple circumferentially distributed inner grooves 30. The horizontal electric push rod 25 is fixed in the inner groove 30. The horizontal piston 26 is fixed on the output end of the horizontal electric push rod 25. The horizontal piston 26 is in sliding sealing cooperation with the inner groove 30. The positioning rod 27 is in sliding sealing cooperation with the inner groove 30. The positioning rod 27 is fixedly set with the mounting plate 28. The positioning wheel 29 is rotatably set on the mounting plate 28. The positioning wheel 29 is used in cooperation with the ring body 11.

[0034] With this design, during use, the horizontal electric push rod 25 drives the horizontal piston 26 to move, and the horizontal piston 26 squeezes the liquid in the inner groove 30. The liquid here is located between the horizontal piston 26 and the positioning rod 27. The liquid in the inner groove 30 pushes the positioning rod 27, causing the positioning rod 27 to drive the positioning wheel 29 on the mounting plate 28 to move. The positioning wheel 29 in the multiple positioning components positions the ring part 11 on the internal gear ring 9, so that the internal gear ring 9 moves and meshes with the pinion 8. When it is necessary to release the positioning, simply reverse the movement of the horizontal electric push rod 25.

[0035] Specifically, the locking components include a locking rod 31, a telescopic spring 32, and a locking block 33. The positioning rod 27 has a central hole 34. The locking rod 31 is slidably sealed in the central hole 34. The telescopic spring 32 surrounds the locking rod 31. The locking rod 31 is movably engaged with the through hole on the mounting plate 28. The locking block 33 is fixed on the locking rod 31.

[0036] With this design, the movement of the horizontal electric push rod 25 has two stages during use. In the first stage, the positioning wheel 29 positions the ring body 11. In the second stage, the horizontal electric push rod 25 continues to move. At this time, because the positioning wheel 29 is limited by the ring body 11, the liquid overcomes the elastic force of the telescopic spring 32 and enters the interior of the central hole 34. The liquid acts on the locking rod 31 in the central hole 34. The locking rod 31 drives the locking block 33 to move and engage with the internal gear ring 9, thereby locking the internal gear ring 9. At this time, the telescopic spring 32 is in a compressed state. When it is necessary to unlock, simply reverse the movement of the horizontal electric push rod 25.

[0037] Specifically, annular plates 35 are fixed on the inner shell 6, and the number of annular plates 35 corresponds one-to-one with the number of auxiliary units; the spiral springs 10 and internal gear rings 9 in the auxiliary units are both located above the annular plates 35. This design facilitates the support of the spiral springs 10 and internal gear rings 9 by the annular plates 35, making it easier to install them.

[0038] 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.

[0039] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An electric compressor, comprising a housing (1) having a motor (2) and a compressor (3), wherein the drive shaft (4) of the motor (2) and the driven shaft (5) of the compressor (3) are connected by a one-way transmission unit; an inner shell (6) and a mounting column (7) are fixed on the outer shell of the motor (2), and at least one auxiliary unit is provided inside the housing (1); characterized in that: The auxiliary unit includes a pinion (8), a snap-fit ​​mechanism, an internal gear ring (9), a spiral spring (10), and a positioning and locking mechanism. The pinion (8) is rotatably mounted on the drive shaft (4) and meshes with the internal gear ring (9). The snap-fit ​​mechanism is used to snap the drive shaft (4) with the pinion (8). The internal gear ring (9) is fixed to the inner shell (6) by the spiral spring (10), and the internal gear ring (9) has a ring body (11). The positioning and locking mechanism is used to mesh the internal gear ring (9) with the pinion (8) and to lock the internal gear ring (9).

2. An electric compressor according to claim 1, characterized in that: The unidirectional transmission unit includes an upper wheel body (12) and a lower wheel body (13). The upper wheel body (12) is fixed to the driven shaft (5). A ratchet groove (14) is provided in the upper wheel body (12). The lower wheel body (13) is fixed to the drive shaft (4). A mounting groove (15) is provided in the lower wheel body (13). A pawl (16) is hinged in the mounting groove (15). The pawl (16) and the ratchet groove (14) are used together. A torsion spring is provided at the hinge point between the pawl (16) and the ratchet groove (14).

3. An electric compressor according to claim 1, characterized in that: The locking mechanism includes a locking block (17), a tension spring (18), and a hydraulic component. The drive shaft (4) has a groove (19) and a connecting groove (20) that are connected to each other. The locking block (17) is slidably disposed in the groove (19) and fixed to the groove (19) by the tension spring (18). The hydraulic component drives the locking block (17) to engage with the locking groove (36) on the pinion (8) by hydraulic pressure.

4. An electric compressor according to claim 3, characterized in that: The hydraulic components include a mounting cylinder (21), an annular shell (22), a vertical electric push rod (23), and a vertical piston (24). The mounting cylinder (21) is fixed on the outer shell of the motor (2) and is integrated with the annular shell (22). The annular shell (22) is rotatably sealed with the drive shaft (4). The vertical electric push rod (23) is fixed inside the mounting cylinder (21). The vertical piston (24) is fixed on the output end of the vertical electric push rod (23). The vertical piston (24) is slidably sealed with the mounting cylinder (21). The mounting cylinder (21) is connected to the connecting groove (20) through the annular shell (22).

5. An electric compressor according to claim 1, characterized in that: The positioning and locking mechanism includes multiple positioning and locking components, which are distributed circumferentially along the mounting column (7); the positioning and locking components include positioning elements and locking elements.

6. An electric compressor according to claim 5, characterized in that: The positioning component includes a horizontal electric push rod (25), a horizontal piston (26), a positioning rod (27), a mounting plate (28), and a positioning wheel (29). The mounting column (7) is provided in multiple circumferentially distributed inner grooves (30). The horizontal electric push rod (25) is fixed in the inner groove (30). The horizontal piston (26) is fixed on the output end of the horizontal electric push rod (25). The horizontal piston (26) and the inner groove (30) are in sliding sealing cooperation. The positioning rod (27) is in sliding sealing within the inner groove (30). The positioning rod (27) is fixedly set with the mounting plate (28). The positioning wheel (29) is rotatably set on the mounting plate (28). The positioning wheel (29) is used in conjunction with the ring body (11).

7. An electric compressor according to claim 6, characterized in that: The locking component includes a locking rod (31), a telescopic spring (32), and a locking block (33). The positioning rod (27) has a central hole (34). The locking rod (31) is slidably sealed in the central hole (34). The telescopic spring (32) surrounds the locking rod (31). The locking rod (31) is movably engaged with the through hole on the mounting plate (28). The locking block (33) is fixed on the locking rod (31).

8. An electric compressor according to claim 1, characterized in that: An annular plate (35) is fixed on the inner shell (6), and the number of annular plates (35) corresponds to the number of auxiliary units. The spiral spring (10) and the internal gear ring (9) in the auxiliary unit are both located above the annular plate (35).

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