Transmission gear assembly suitable for liquid adding pump

Abstract

The utility model relates to the technical field of drainage equipment, in particular to a transmission gear assembly suitable for a liquid adding pump, which comprises a last-stage transmission gear, a first-stage transmission gear, a second-stage transmission gear and a third-stage transmission gear, the final-stage transmission gear comprises a gear disc and a supporting part which is arranged on the gear disc and is used for supporting the gear disc; the connecting part is arranged in a shell of the liquid adding pump and used for being connected with the supporting part to support the gear disc; an annular cavity suitable for insertion of the supporting part is formed in the connecting part; and when the supporting part is inserted into the annular cavity, an oil storage interval used for storing lubricating oil is formed between the supporting part and the annular cavity.

Description

Technical Field

[0001] The utility model relates to the technical field of drainage equipment, in particular to a transmission gear assembly suitable for a liquid adding pump. Background Art

[0002] Liquid pumps are widely used in household appliances such as, but not limited to, dishwashers and washing machines. Liquid pumps generally include a cavity, a motor, a transmission system, etc. The cavity is used to pump and output liquid, the motor is used to generate power, and the transmission system is used to transmit the power generated by the motor to the cavity.

[0003] The transmission system is usually implemented by a gear assembly. The final transmission gear in the gear assembly, i.e., the gear at the end of the power transmission, is generally matched with the housing by a single cantilever shaft. For example, the patent with announcement number CN 209733895 U proposes a liquid filling pump. The actual use research found that:

[0004] Although lubricating oil is applied on the contact surface between the single cantilever shaft and the final transmission gear, during the long-term use of the overall liquid adding pump, the lubricating oil applied on the contact surface between the single cantilever shaft and the final transmission gear will gradually be lost, resulting in dry friction between the two. On the one hand, the final transmission gear and the single cantilever shaft will be worn and their service life will be affected. On the other hand, when the final transmission gear and the single cantilever shaft are worn, the matching accuracy of the two will be reduced, the stability of the use process will be reduced, and the flow accuracy of the overall liquid adding pump will be reduced. Therefore, the structure of the transmission gear assembly of the liquid adding pump of the above-mentioned disclosed technology needs to be further optimized. Utility Model Content

[0005] The utility model aims to provide a transmission gear assembly suitable for a liquid adding pump, so as to solve the technical problem of enhancing the stability of the use process of the liquid adding pump.

[0006] The transmission gear assembly suitable for the liquid adding pump of the utility model is realized as follows:

[0007] A transmission gear assembly suitable for a liquid charging pump, comprising:

[0008] A final transmission gear, which is used to output power; the final transmission gear comprises a gear plate and a support portion provided on the gear plate for supporting the gear plate;

[0009] A connecting part, which is arranged in the housing of the liquid charging pump and is used to be connected with the supporting part to form a support for the gear plate; an annular cavity suitable for the supporting part to be inserted is formed in the connecting part; and

[0010] When the support portion is inserted into the annular cavity, an oil storage area for storing lubricating oil is formed between the support portion and the annular cavity.

[0011] In an optional embodiment of the present invention, the oil storage area includes an oil storage portion reserved between an end surface of the support portion away from the gear plate and a bottom wall of the annular cavity.

[0012] In an optional embodiment of the present invention, the support portion is a single support column in a cylindrical shape with a hollow cavity; and

[0013] The connecting portion comprises an inner limiting column arranged concentrically and an outer limiting column located outside the inner limiting column;

[0014] The inner limiting column and the outer limiting column are both cylindrical; the annular cavity is formed between the outer limiting column and the inner limiting column.

[0015] In an optional embodiment of the present invention, the axial length of the outer limiting column is equal to the axial length of the inner limiting column; and

[0016] The axial length of the single support column is smaller than the axial length of the inner limiting column.

[0017] In an optional embodiment of the present invention, the axial length of the outer limiting column is smaller than the axial length of the inner limiting column; and

[0018] The axial length of the outer limiting column is greater than the axial depth of the oil storage part.

[0019] In an optional embodiment of the present invention, the axial length of the inner limiting column is smaller than the axial length of the outer limiting column; and

[0020] The axial length of the inner limiting column is greater than the axial depth of the oil storage portion.

[0021] In an optional embodiment of the present invention, the oil storage area also includes at least one inner oil storage groove extending along the axial direction of the single support column formed between the inner wall surface of the single support column and the outer wall surface of the inner limit column.

[0022] In an optional embodiment of the present invention, the oil storage area also includes at least one external oil storage groove extending along the axial direction of the single support column formed between the outer wall surface of the single support column and the inner wall surface of the outer limit column.

[0023] In an optional embodiment of the present invention, the support portion is at least two support columns arranged concentrically, and an annular cavity is formed between every two adjacent support columns; and

[0024] The connecting portion includes at least three concentrically arranged limiting columns, and the annular cavity is formed between every two adjacent limiting columns;

[0025] Each of the support columns is suitable for radially staggered plug-in cooperation with the limiting column, so that each of the support columns is suitable for being inserted into the corresponding annular cavity.

[0026] In an optional embodiment of the present invention, the support portion and the gear plate are coaxially distributed.

[0027] By adopting the above technical scheme, the utility model has the following beneficial effects: the utility model is suitable for the transmission gear assembly of the liquid adding pump. For the final transmission gear adopted by the utility model, an oil storage area for storing lubricating oil is formed between the supporting part of the final transmission gear and the connecting part in the housing of the liquid adding pump, so that the lubricating oil will not be lost when the liquid adding pump is working, and dry friction between the supporting part and the connecting part can be avoided, thereby reducing the wear between the two, further improving the service life of the two, and at the same time improving the stability during use, thereby ensuring the flow accuracy of the overall liquid adding pump.

[0028] Furthermore, regarding the cooperation between the connecting portion and the supporting portion, wherein the connecting portion includes two or more limiting columns, the supporting strength for the final-stage transmission gear can be improved, and the risk of the final-stage transmission gear being tilted during use can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of a transmission gear assembly suitable for a liquid adding pump of the utility model;

[0030] Figure 2 It is a structural schematic diagram of the final stage transmission gear of the transmission gear assembly suitable for the liquid adding pump of the utility model;

[0031] Figure 3 It is a cross-sectional structural schematic diagram of the final stage transmission gear of the transmission gear assembly suitable for the liquid adding pump of the utility model;

[0032] Figure 4 It is a structural schematic diagram of the connecting portion of the transmission gear assembly applicable to the liquid adding pump of the utility model;

[0033] Figure 5 It is a cross-sectional structural schematic diagram of the connecting portion of the transmission gear assembly applicable to the liquid adding pump of the utility model;

[0034] Figure 6 It is a structural schematic diagram of the transmission gear assembly suitable for a liquid adding pump of the utility model applied in the liquid adding pump.

[0035] In the figure: a gear plate 11 , a single support column 12 , a connecting portion 13 , a pull rod 2 , an oil storage portion 3 , a housing 4 , an inner limit column 51 , an outer limit column 52 , and an annular cavity 53 . DETAILED DESCRIPTION

[0036] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings.

[0037] Embodiment 1:

[0038] See also Figures 1 to 6 As shown, this embodiment provides a transmission gear assembly suitable for a liquid adding pump, including: a final transmission gear, at least one intermediate transmission gear meshing with the final transmission gear, and a power structure for driving the at least one intermediate transmission gear to operate, such as but not limited to a motor. This embodiment only improves the final transmission gear, so the following embodiment description only describes the final transmission gear in detail.

[0039] Generally speaking, the final transmission gear is used to output power; the final transmission gear includes a gear plate 11 and a support portion provided on the gear plate 11 for supporting the gear plate 11; in this embodiment, the support portion and the gear plate 11 are coaxially distributed. In this regard, for the liquid filling pump, in order to meet the use requirements of the final transmission gear, a connecting portion is provided in the housing 4 of the liquid filling pump, which is used to connect with the support portion to form a support for the gear plate 11. In addition, it should be noted here that the final transmission gear also includes a connecting portion 13 provided on the gear plate 11 for connecting the pull rod 2 of the liquid filling pump.

[0040] Furthermore, an annular cavity 53 suitable for the support portion to be inserted is formed in the connecting portion; and when the support portion is inserted into the annular cavity 53, an oil storage area for storing lubricating oil is formed between the support portion and the annular cavity 53. It should be noted that there may be more than one annular cavity 53 and more than one corresponding support portion.

[0041] Regarding the oil storage area, in an optional implementation, the oil storage area includes an oil storage portion 3 reserved between the end surface of the support portion away from the gear plate 11 and the bottom wall of the annular cavity 53 .

[0042] In order to form the above-mentioned oil storage part 3, a specific optional implementation is given as an example with reference to the accompanying drawings:

[0043] First, the supporting part is a single supporting column 12 with a hollow cavity and a cylindrical shape; and the connecting part includes an inner limit column 51 arranged concentrically and an outer limit column 52 located outside the inner limit column 51; the inner limit column 51 and the outer limit column 52 are both cylindrical; and an annular cavity 53 is formed between the outer limit column 52 and the inner limit column 51.

[0044] It should be noted that the end surface of the inner limit column 51 facing the gear plate 11 is an open or closed surface, and the inner limit column 51 is a solid column or a column with a hollow cavity. This embodiment does not make an absolute limitation on this.

[0045] Based on the above situation, in the first optional implementation, the shaft length of the outer limit column 52 is equal to the shaft length of the inner limit column 51; and the shaft length of the single support column 12 is less than the shaft length of the inner limit column 51. The connection part under this structure is not only easy to process, but also forms the largest support contact surface between the support part and the connection part, which can effectively improve the support effect of the connection part on the final transmission gear.

[0046] The first embodiment can also be deformed to form a second optional embodiment, where the shaft length of the outer limit column 52 is less than the shaft length of the inner limit column 51; and the shaft length of the outer limit column 52 is greater than the shaft depth of the oil storage portion 3. The first embodiment can also be deformed to form a third optional embodiment, where the shaft length of the inner limit column 51 is less than the shaft length of the outer limit column 52; and the shaft length of the inner limit column 51 is greater than the shaft depth of the oil storage portion 3. For the second and third optional embodiments here, compared with the first embodiment, the supporting effect of the connecting portion on the supporting portion is slightly reduced, but it can still meet the oil storage function of the oil storage portion 3 to ensure the continuous lubrication effect between the supporting portion and the connecting portion.

[0047] In summary, for the transmission gear assembly suitable for the liquid adding pump of the present embodiment, an oil storage interval for storing lubricating oil is formed between the supporting portion of the final transmission gear and the connecting portion in the housing 4 of the liquid adding pump. When the liquid adding pump is working, the opening of the connecting portion is oriented in the opposite direction of the gravity of the lubricating oil in the storage interval, so that the lubricating oil accumulates in the oil storage interval under the action of gravity and will not be lost. Under this structure, dry friction between the supporting portion and the connecting portion can be avoided, thereby reducing the wear between the two, further improving the service life of the two, and at the same time improving the stability during use, thereby ensuring the flow accuracy of the overall liquid adding pump.

[0048] Embodiment 2:

[0049] Based on the transmission gear assembly suitable for the liquid adding pump of Example 1, the supporting portion of the transmission gear assembly suitable for the liquid adding pump provided in this embodiment comprises at least two support columns arranged concentrically, and an annular cavity is formed between each two adjacent support columns; and the connecting portion comprises at least three limit columns arranged concentrically, and an annular cavity is formed between each two adjacent limit columns; each support column is suitable for radially staggered plug-in cooperation with the limit column, so that each support column is suitable for being inserted into the corresponding annular cavity.

[0050] In summary, the cooperation between the connecting portion and the supporting portion, wherein the connecting portion includes two or more limit columns, can improve the supporting strength for the final transmission gear and reduce the risk of the final transmission gear tilting during use.

[0051] Embodiment 3:

[0052] On the basis of the transmission gear assembly applicable to the liquid adding pump of Example 1 or Example 2, the oil storage area of ​​the transmission gear assembly applicable to the liquid adding pump provided in this embodiment also includes at least one inner oil storage tank extending along the axial direction of the single support column 12 formed between the inner wall surface of the single support column 12 and the outer wall surface of the inner limit column 51. Or the oil storage area also includes at least one outer oil storage tank extending along the axial direction of the single support column formed between the outer wall surface of the single support column 12 and the inner wall surface of the outer limit column 52. Of course, the inner oil storage tank and the outer oil storage tank here can also exist together, and this embodiment does not make an absolute limitation on this.

[0053] On the basis of the above structure, this embodiment forms an axial oil storage space and a radial oil storage space by cooperating with the oil storage portion 3 and the inner oil storage tank and / or the outer oil storage tank, thereby enhancing the lubrication effect between the support portion and the connection portion.

[0054] In addition, it should be noted that, theoretically, for the oil storage area of ​​the transmission gear assembly of the liquid filling pump of this embodiment, the structure of the oil storage part can be eliminated, and only the inner oil storage tank and / or the outer oil storage tank can be designed.

[0055] The above specific embodiments further illustrate the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0056] In the description of the present invention, it is necessary to understand that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0057] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] In the present utility model, unless otherwise clearly specified and limited, the first feature being above or below the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature being above, above, and above the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being below, below, and below the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

Claims

1. A transmission gear assembly suitable for a liquid filling pump, characterized in that: include: A final transmission gear, which is used to output power; the final transmission gear comprises a gear plate and a support portion provided on the gear plate for supporting the gear plate; A connecting part, which is arranged in the housing of the liquid filling pump and is used to be connected with the supporting part to form a support for the gear plate; an annular cavity suitable for the supporting part to be inserted is formed in the connecting part; as well as When the support portion is inserted into the annular cavity, an oil storage area for storing lubricating oil is formed between the support portion and the annular cavity.

2. The transmission gear assembly suitable for a liquid filling pump according to claim 1, characterized in that: The oil storage area includes an oil storage portion reserved between the end surface of the support portion away from the gear plate and the cavity bottom wall of the annular cavity.

3. The transmission gear assembly suitable for a liquid filling pump according to claim 2, characterized in that: The support portion is a single support column in a cylindrical shape with a hollow cavity; and The connecting portion comprises an inner limiting column arranged concentrically and an outer limiting column located outside the inner limiting column; The inner limiting column and the outer limiting column are both cylindrical; the annular cavity is formed between the outer limiting column and the inner limiting column.

4. The transmission gear assembly suitable for a liquid filling pump according to claim 3, characterized in that: The axial length of the outer limiting column is equal to the axial length of the inner limiting column; and The axial length of the single support column is smaller than the axial length of the inner limiting column.

5. The transmission gear assembly suitable for a liquid filling pump according to claim 3, characterized in that: The axial length of the outer limiting column is smaller than the axial length of the inner limiting column; and The axial length of the outer limiting column is greater than the axial depth of the oil storage part.

6. The transmission gear assembly suitable for a liquid filling pump according to claim 3, characterized in that: The axial length of the inner limiting column is smaller than the axial length of the outer limiting column; and The axial length of the inner limiting column is greater than the axial depth of the oil storage portion.

7. The transmission gear assembly suitable for a liquid filling pump according to any one of claims 3 to 6, characterized in that: The oil storage area also includes at least one inner oil storage groove extending along the axial direction of the single support column, which is formed between the inner wall surface of the single support column and the outer wall surface of the inner limit column.

8. The transmission gear assembly suitable for a liquid filling pump according to any one of claims 3 to 6, characterized in that: The oil storage area also includes at least one outer oil storage groove extending along the axial direction of the single support column, which is formed between the outer wall surface of the single support column and the inner wall surface of the outer limit column.

9. The transmission gear assembly suitable for a liquid filling pump according to claim 1, characterized in that: The support portion is at least two support columns arranged concentrically, and an annular cavity is formed between every two adjacent support columns; and The connecting portion includes at least three concentrically arranged limiting columns, and the annular cavity is formed between every two adjacent limiting columns; Each of the support columns is suitable for radially staggered plug-in cooperation with the limiting column, so that each of the support columns is suitable for being inserted into the corresponding annular cavity.

10. The transmission gear assembly suitable for a liquid filling pump according to claim 1, characterized in that: The support portion and the gear plate are in a coaxial distribution structure.

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