Multi-stage gear transmission mechanism and double-power washing machine using the same

Abstract

The application discloses a kind of multistage gear transmission mechanism and adopt the dual-power washing machine of this transmission mechanism, which includes output gear, reduction gearbox upper cover, reduction gearbox main body, first gear, first shaft, second gear, third gear, main input gear, third shaft, fourth gear, second shaft, connecting pipe, first yoke synchronizer, second yoke synchronizer.Main input gear, first gear are arranged on the first shaft;Second shaft is slidably arranged in the output gear, and the second shaft is connected with the second gear, and the output gear is in transmission connection with the first gear.The connecting pipe is sleeved on the output end of the second shaft.The first yoke synchronizer and the second yoke synchronizer are arranged on the second shaft and the third shaft respectively.Compared with the prior art, the application has the advantages of simple structure, easy manufacturing, long service life and low operating noise.

Description

Technical Field

[0001] This invention relates to a washing machine, specifically to a dual-power washing machine and the multi-stage gear transmission mechanism used therein. Background Technology

[0002] A dual-power washing machine has its inner drum and pulsator rotating in opposite directions during washing, and in the same direction during spin-drying. This makes clothes cleaner and prevents them from tangling.

[0003] Dual-power washing machines often involve the transmission mechanism that drives the pulsator and inner drum. Currently, most such transmission mechanisms involve planetary gear structures, as exemplified by Chinese utility model patents such as application number CN201720132758.X, authorization announcement number CN206521622U, entitled "An Input Shaft Sleeve for a Dual-Power Washing Machine Reduction Clutch," and application number CN201120542936.9, authorization announcement number CN202380275U, entitled "A Planetary Gear Reduction System for a Dual-Power Washing Machine Drive Mechanism." This planetary gear transmission structure involves the machining of the internal gears and the balance of the planetary gear arrangement. During use, it often generates low-frequency noise, is prone to tooth surface wear, and is easily damaged, resulting in a reduced overall gear lifespan. Furthermore, it suffers from strong axial movement, high friction, and a tendency to generate high-frequency vibration noise and dry friction noise, which also leads to a reduced lifespan.

[0004] In view of this, the present invention is proposed. Summary of the Invention

[0005] The primary objective of this invention is, in a first aspect, to provide a multi-stage gear transmission mechanism that offers stable transmission and low noise.

[0006] The second aspect is to provide a dual-power washing machine that employs the aforementioned multi-stage gear transmission mechanism.

[0007] The technical solution used in the multi-stage gear transmission mechanism is as follows: A multi-stage gear transmission mechanism includes an output gear, a gearbox cover, a gearbox body, a first gear, a first shaft, a second gear, a third gear, a main input gear, a third shaft, a fourth gear, a second shaft, a connecting pipe, a first shift fork synchronizer, and a second shift fork synchronizer;

[0008] The main input gear and the first gear are respectively located at the lower and upper ends of the first shaft inside the gearbox body; the second shaft is slidably inserted in the output gear, the input end of the second shaft is connected to the second gear, and the output gear is connected to the first gear in a transmission connection.

[0009] The connecting tube is sleeved on the output end of the second shaft and connected to the output gear; the first shift fork synchronizer is set on the second shaft;

[0010] The third gear is slidably sleeved on the input end of the third shaft, and the fourth gear is set on the output end of the third shaft. The third gear is connected to the main input gear, and the fourth gear is connected to the second gear.

[0011] The second shift fork synchronizer is located on the third axis.

[0012] Preferably, the first shift fork synchronizer includes a first synchronizer and a first shift fork. The second shift fork synchronizer includes a second synchronizer and a second shift fork.

[0013] The first synchronizer is located below the output gear, and the first shift fork is located below the first synchronizer; the second synchronizer is located above the third gear, and the second shift fork is located above the second synchronizer. Furthermore, the upper end of the output shaft is connected to the impeller via a spline drive. The output gear, first gear, second gear, third gear, main input gear, and fourth gear are all helical gears. Thrust bearings are installed between the main input gear, third gear, fourth gear, and related components of the gearbox body.

[0014] Washing machines equipped with the above multi-stage gear transmission mechanism operate in two modes: washing and spin-drying.

[0015] During washing, the first shift fork synchronizer controls the output gear to disengage from the first gear and rotate in the same direction. The first gear drives the output gear to rotate, which in turn drives the connecting tube to rotate in one direction. At the same time, the second synchronizer controls the third gear to rotate in the same direction as the main input gear, which finally drives the second shaft to rotate in the opposite direction to the rotation of the connecting tube.

[0016] During dehydration, the first shift fork synchronizer controls the output gear to rotate in the same direction as the first gear, the second synchronizer controls the third gear to disengage from the main input gear and rotate in the same direction, the third gear idles, and the second shaft of the connecting tube rotates at the same speed in the same direction.

[0017] The multi-stage gear transmission mechanism described in this invention has the following advantages:

[0018] 1. All gears involved are external gears, which are easy to machine and heat treat. Each gear has high wear resistance, which can effectively solve some of the problems existing in planetary gear transmission structures.

[0019] 2. The relative positions of the first and second fork synchronizers, with the first fork positioned below the first synchronizer and the second fork positioned above the second synchronizer, can improve space utilization and reduce the overall space occupied by the washing machine.

[0020] 3. The output gear, first gear, second gear, third gear, main input gear, and fourth gear are all helical gears, which makes the washing machine run smoothly and has a long service life;

[0021] 4. The use of thrust bearings can effectively prevent sliding friction and noise between the main input gear, third gear, fourth gear and related components of the gearbox, and can also reduce the assembly difficulty of the washing machine.

[0022] 5. The spline drive connection structure has the advantages of high connection reliability and long service life.

[0023] Therefore, compared with existing two-way pulsator washing machines, the bidirectional pulsator washing machine using the multi-stage gear transmission mechanism described in this invention has the advantages of simple structure, easy processing and manufacturing, long service life, and low operating noise.

[0024] The technical solution used in the washing machine employing the above-mentioned multi-stage gear transmission mechanism is as follows: a washing machine that employs the above-mentioned multi-stage gear transmission mechanism.

[0025] Preferably, the upper end of the washing machine's output shaft is connected to the impeller drive, the lower end of the output shaft is coaxially connected to the upper end of the second shaft, and the lower end of the first shaft passes through the gearbox body and is connected to the upper end of the motor's output shaft via a drive connection.

[0026] As mentioned above, compared with existing dual-power washing machines, the washing machine described above has the advantages of simple structure, easy processing and manufacturing, long service life and low operating noise.

[0027] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0028] The accompanying drawings, as part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention, but do not constitute an undue limitation of the invention. Obviously, the drawings described below are merely some embodiments, and those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings:

[0029] Figure 1 : A schematic diagram of the structure of the washing machine of the present invention;

[0030] In the diagram: 1. Inner cylinder; 2. Outer cylinder; 3. Impeller; 4. Spline; 5. Output shaft; 6. Chassis support; 7. Output gear; 8. Gearbox cover; 9. Transmission mechanism; 10. Gearbox body; 11. Chassis; 12. First gear; 13. First shaft; 14. First synchronizer; 15. First shift fork; 16. Main input gear; 17. Motor; 18. Second gear; 19. Third gear; 20. Second synchronizer; 21. Second shift fork; 22. Third shaft; 23. Fourth gear; 24. Second shaft; 25. Connecting pipe; 26. Thrust bearing

[0031] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the invention in any way, but rather to illustrate the concept of the invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0033] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0034] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0035] Examples of multi-stage gear transmission mechanisms:

[0036] This embodiment uses diagrams and washing machine usage. Figure 1 To, that is Figure 1 .

[0037] like Figure 1As shown, a multi-stage gear transmission mechanism 9 includes an output gear 7, a gearbox cover 8, a gearbox body 10, a first gear 12, a first shaft 13, a second gear 18, a third gear 19, a main input gear 16, a third shaft 22, a fourth gear 23, a second shaft 24, a connecting pipe 25, a first shift fork synchronizer, and a second shift fork synchronizer.

[0038] The main input gear 16 and the first gear 12 are respectively located at the lower end and the upper end of the first shaft 13 inside the gearbox body 10; the second shaft 24 is slidably inserted in the output gear 7, the input end of the second shaft 24 is connected to the second gear 18, and the output gear 7 is connected to the first gear 12 in a transmission connection.

[0039] The connecting pipe 25 is sleeved on the output end of the second shaft 24 and connected to the output gear 7;

[0040] The first shift fork synchronizer is mounted on the second shaft 24;

[0041] The third gear 19 is slidably sleeved on the input end of the third shaft 22, and the fourth gear 23 is set on the output end of the third shaft 22. The third gear 19 is connected to the main input gear 16 in a transmission connection, and the fourth gear 23 is connected to the second gear 18 in a transmission connection.

[0042] The second shift fork synchronizer is located on the third axis 22.

[0043] The first shift fork synchronizer includes a first synchronizer 14 and a first shift fork 15; the second shift fork synchronizer includes a second synchronizer 20 and a second shift fork 21. The first synchronizer 14 is located below the output gear 7, and the first shift fork 15 is located below the first synchronizer 14; the second synchronizer 20 is located above the third gear 19, and the second shift fork 21 is located above the second synchronizer 20. The upper end of the output shaft 5 is connected to the impeller 3 via a spline 4. Preferably, the output gear 7, the first gear 12, the second gear 18, the third gear 19, the main input gear 16, and the fourth gear 23 are all helical gears, and a thrust bearing 26 is provided between the main input gear 16, the third gear 19, the fourth gear 23, and the relevant components of the gearbox body 10.

[0044] An embodiment of a washing machine equipped with the aforementioned multi-stage gear transmission mechanism:

[0045] like Figure 1As shown, the present invention includes an inner drum 1, an outer drum 2, a pulsator 3, an output shaft 5, a chassis support 6, a transmission mechanism 9, a chassis 11, a motor 17, and an automatic control system for a washing machine that is not shown in the figure due to being prior art. The transmission mechanism 9 includes a gearbox cover 8 and a gearbox body 10. The gearbox cover 8 is detachably fixed to the gearbox body 10, and the gearbox cover 8 is detachably fixed to the outer drum 2 by bolts. The chassis 11 and the chassis support 6 are detachably fixed together by bolts. The bottom of the inner drum 1 is slidably supported on the chassis 11, and the chassis support 6 is slidably supported on the middle of the outer drum 2. Related structural details are not described here as they are prior art.

[0046] The transmission mechanism 9 also includes an output gear 7, a first gear 12, a first shaft 13, a second gear 18, a third gear 19, a main input gear 16, a third shaft 22, a fourth gear 23, a second shaft 24, a connecting pipe 25, a first shift fork synchronizer, and a second shift fork synchronizer;

[0047] The upper end of the output shaft 5 and the impeller 3 are detachably connected via spline 4. The specific installation structure of the output shaft and impeller is a simple and well-known technology and will not be described in detail here. The lower end of the output shaft 5 and the upper end of the second shaft 24 are coaxially and detachably fixedly connected. The upper end of the connecting pipe 25 and the inner cylinder 1 are detachably fixedly connected via a well-known structure. The lower end of the connecting pipe 25 and the center part of the output gear 7 are detachably fixedly connected via a well-known structure. The lower end of the second shaft 24 smoothly passes through the center hole of the output gear 7 and is detachably fixedly connected to the second gear 18 via a well-known structure. The center hole of the output gear 7 and the lower end of the second shaft 24 are rotatably connected. Specific structural details are a simple technology and will not be described in detail here.

[0048] The lower end of the first shaft 13 is connected to the upper end of the output shaft of the motor 17 via a known structure. The main input gear 16 and the first gear 12 are respectively fixed to the lower and upper ends of the first shaft 13 within the gearbox body 10 using known transmission structures. The fourth gear 23 is fixed to the upper end of the third shaft 22. The first shift fork synchronizer is located at the upper end of the second shaft, and the second shift fork synchronizer is located at the lower end of the third shaft 22. The fourth gear 23 is connected to the second gear 18 located at the lower end of the second shaft 24. The lower end of the third shaft 22 is rotatably connected to the center hole of the third gear 19. Specific structural details are omitted here due to their simplicity.

[0049] The first shift fork synchronizer includes a first synchronizer 14 and a first shift fork 15; the second shift fork synchronizer includes a second synchronizer 20 and a second shift fork 21. Preferably, the first synchronizer 14 is located below the output gear 7, and the first shift fork 15 is located below the first synchronizer 14; the second synchronizer 20 is located above the third gear 19, and the second shift fork 21 is located above the second synchronizer 20. The specific connection structure and working principle of the first shift fork synchronizer, the second shift fork synchronizer, and related components are well-known technologies and will not be described in detail here.

[0050] When doing laundry,

[0051] The first synchronizer is separated from the output gear. The first gear drives the output gear to rotate, which in turn drives the outer cylinder to rotate in one direction. At the same time, the second synchronizer and the third gear are connected, which finally drives the impeller to rotate in the opposite direction to the inner cylinder.

[0052] During dehydration, the first synchronizer is connected to the output gear, the second synchronizer is separated from the third gear, the third gear idles, and the outer cylinder and impeller rotate at the same speed and in the same direction.

[0053] Preferably, the output gear 7, the first gear 12, the second gear 18, the third gear 19, the main input gear 16, and the fourth gear 23 are all helical gears. Thrust bearings 26 are provided between the main input gear 16, the third gear 19, the fourth gear 23, and related components of the gearbox body 10. The specific installation structure is a simple technique and will not be described in detail here.

[0054] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present invention. The implementation schemes in the above embodiments can also be further combined or replaced. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A multi-stage gear transmission mechanism, characterized in that: Includes output gear (7), gearbox cover (8), gearbox body (10), first gear (12), first shaft (13), second gear (18), third gear (19), main input gear (16), third shaft (22), fourth gear (23), second shaft (24), connecting pipe (25), first shift fork synchronizer, and second shift fork synchronizer; The main input gear (16) and the first gear (12) are respectively located at the lower end and the upper end of the first shaft (13) inside the gearbox body (10); the second shaft (24) is slidably inserted in the output gear (7), the input end of the second shaft (24) is connected to the second gear (18), and the output gear (7) is connected to the first gear (12) in a transmission connection; The connecting pipe (25) is sleeved on the output end of the second shaft (24) and connected to the output gear (7); The first shift fork synchronizer is mounted on the second shaft (24); The third gear (19) is slidably sleeved on the input end of the third shaft (22), and the fourth gear (23) is set on the output end of the third shaft (22). The third gear (19) is connected to the main input gear (16) and the fourth gear (23) is connected to the second gear (18). The second shift fork synchronizer is located on the third axis (22).

2. The multi-stage gear transmission mechanism according to claim 1, characterized in that: The first shift fork synchronizer includes a first synchronizer (14) and a first shift fork (15); the second shift fork synchronizer includes a second synchronizer (20) and a second shift fork (21); The first synchronizer (14) is located below the output gear (7), and the first shift fork (15) is located below the first synchronizer (14); the second synchronizer (20) is located above the third gear (19), and the second shift fork (21) is located above the second synchronizer (20).

3. The multi-stage gear transmission mechanism of claim 1, wherein: The upper end of the output shaft (5) and the impeller (3) are connected by a spline (4).

4. The multi-stage gear transmission mechanism of claim 1, wherein: The output gear (7), the first gear (12), the second gear (18), the third gear (19), the main input gear (16), and the fourth gear (23) are all helical gears.

5. The multi-stage gear transmission mechanism of claim 1, wherein: A thrust bearing (26) is provided between the main input gear (16), the third gear (19), the fourth gear (23) and the relevant components of the gearbox body (10).

6. A dual-power washing machine, characterized in that: The multi-stage gear transmission mechanism is as described in any one of claims 1-5.

7. The dual-power washing machine according to claim 6, characterized in that: The upper end of the output shaft (5) is connected to the impeller (3) for transmission, the lower end of the output shaft (5) is coaxially connected to the upper end of the second shaft (24), and the lower end of the first shaft (13) passes through the gearbox body (10) and is connected to the upper end of the output shaft of the motor (17) for transmission.

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