Washing machine speed reducer with sand-proof oil seal structure

Abstract

The utility model discloses a washing machine speed reducer with a sand-proof oil seal structure, and belongs to the technical field of washing machine accessories. Comprising a speed reducer body, an output shaft installed at the power output end of the speed reducer body, an end cover installed on the outer side of the output shaft and fixedly connected with the speed reducer body, and a double-lip oil seal installed on the inner side of a cavity of the end cover and tightly connected with the output shaft in an abutting mode. The marking groove can be completely covered by the outer edge part of the double-lip oil seal to ensure that the axial lead of the double-lip oil seal and the axial lead of the output shaft are positioned on the same straight line, so that a good sealing effect of the double-lip oil seal is ensured, and the pressing part and the outer edge part of the double-lip oil seal are pressed by screwing the screw cap, so that the double-lip oil seal is positioned, and the sealing effect of the double-lip oil seal is ensured. Deviation of the double-lip oil seal is avoided, silt is prevented from entering the speed reducer body through the output shaft, and the service life of the speed reducer body is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of washing machine accessories, and more specifically to a washing machine reducer with a sand-proof oil seal structure. Background Art

[0002] A washing machine is a cleaning appliance that uses electrical energy to create mechanical action to wash clothes. With the development of the economy, washing machines are used more and more widely, and their types are becoming more and more numerous. A pulsator washing machine is a type of washing machine. The pulsator is driven by an electric motor to rotate, and the water flow in the barrel forms a vortex, which drives the fabric to rotate and tumble, thus removing stains from the clothes.

[0003] The existing patent discloses a new type of washing machine with an inner and outer impeller structure. The patent authorization number CN205711415U includes a washing machine body, an inner impeller, an outer impeller, a reducer, a transmission shaft, and a connecting flange. The outer impeller is installed in the washing machine body, and a concave cavity is formed in the middle of the outer impeller. A connecting flange is arranged in the middle of the outer impeller, and the connecting flange is clamped and fixed on the outer impeller. An insert is arranged between the outer impeller and the transmission outer shaft, and the inner impeller is sleeved in the concave cavity and clamped on the transmission inner shaft. An insert A is arranged between the inner impeller and the transmission inner shaft, and the transmission shaft is located on the reducer below the outer impeller, and the lower pulley is connected to the pulley of the motor through a belt. The device is provided with an inner impeller and an outer impeller, and the inner impeller is cleaned by the friction generated by the two impellers rotating and rubbing in opposite directions, thereby improving the cleaning effect of the washing machine. Clothes are not entangled when washing, which reduces the difficulty of washing and avoids cleaning dead corners. The friction of double impellers for washing is large, the washing water flow intensity is large, and the cleaning effect is obvious.

[0004] However, the output shaft end of the reducer in patent authorization number CN205711415U is equipped with an oil seal for sealing, which plays a role in preventing mud and sand. However, after working for a long time, the oil seal will be misaligned between its axis and the axis of the output shaft due to various factors, thereby affecting the sealing effect of the oil seal, causing the mud and sand mixed in the washing machine during water seepage to enter the reducer through the output shaft, causing gear wear in the reducer, and seriously affecting the service life of the reducer. Therefore, we propose a washing machine reducer with a sand-proof oil seal structure to solve the above-mentioned problems. Utility Model Content

[0005] 1. Technical issues to be solved

[0006] In view of the problems existing in the prior art, the purpose of the utility model is to provide a washing machine reducer with a sand-proof oil seal structure, which can completely cover the identification groove through the outer edge of the double-lip oil seal to ensure that the axis center line of the double-lip oil seal and the axis center line of the output shaft are on the same straight line, thereby ensuring a good sealing effect of the double-lip oil seal, and by screwing in the screw cover to press the crimping part with the outer edge of the double-lip oil seal, the double-lip oil seal is positioned to avoid deviation of the double-lip oil seal and prevent mud and sand from entering the reducer body through the output shaft to ensure the service life of the reducer body.

[0007] 2. Technical solution

[0008] To solve the above problems, the utility model adopts the following technical solutions.

[0009] A washing machine reducer with a sand-proof oil seal structure, comprising a reducer body, an output shaft mounted at a power output end of the reducer body, an end cover mounted on the outside of the output shaft and fixedly connected to the reducer body, and a double-lip oil seal mounted on the inner side of a cavity of the end cover and tightly abutting against the output shaft, wherein an inner wall of the cavity of the end cover is provided with an identification groove, and the identification groove corresponds to an outer edge of the double-lip oil seal, and an outer wall of a connection portion of the end cover is provided with an external thread;

[0010] The outer side of the external thread is detachably connected with a screw cap, the inner wall of the screw cap is provided with an internal thread screwed with the external thread, and the edge of the screw cap away from the reducer body is surrounded by a crimping portion that fits tightly with the outer edge of the double-lip oil seal.

[0011] Furthermore, an elastic gasket in a spiral structure is sleeved between the connecting portion of the end cover and the screw cap, and the elastic gasket is in tight contact with the end cover.

[0012] Furthermore, a flat washer is installed between the elastic washer and the screw cap, and two side surfaces of the flat washer are respectively tightly fitted with the elastic washer and the screw cap.

[0013] Furthermore, the identification groove is located at the root of the chamfer provided on the cavity;

[0014] The outer edge of the double-lip oil seal corresponds to the root of the chamfer.

[0015] Furthermore, the crimping portion and the screw cap are an integrally formed structure, and the inner diameter of the crimping portion is greater than the outer diameter of the output shaft.

[0016] Furthermore, an anti-skid tooth is integrally formed on the outer wall of the screw cap corresponding to the axial position of the output shaft, and a plurality of the anti-skid teeth are arranged at the radial position of the screw cap.

[0017] Furthermore, the screw cap is made of stainless steel.

[0018] 3. Beneficial effects

[0019] Compared with the prior art, the advantages of the present invention are:

[0020] (1) In this solution, the double-lip oil seal is assembled into the cavity of the end cover by using a fixture so that the outer edge of the double-lip oil seal completely covers the identification groove, thereby ensuring that the axis of the double-lip oil seal and the axis of the output shaft are on the same straight line, thereby ensuring a good sealing effect of the double-lip oil seal;

[0021] The screw cap is screwed together with the external thread provided at the end cap by means of the internal thread. The crimping part is pressed against the outer edge of the double-lip oil seal by screwing in the screw cap, thereby positioning the double-lip oil seal to avoid displacement of the double-lip oil seal. The output shaft is connected to the impeller of the washing machine for transmission, so that the double-lip oil seal can effectively block the mud and sand in the water seeping out of the impeller, thereby preventing the mud and sand from entering the reducer body through the output shaft, so as to ensure the service life of the reducer body.

[0022] (2) In this solution, the elastic gasket and the flat washer are squeezed by rotating the screw cap, so that the elastic force of the elastic gasket and the flat washer can be used to effectively prevent the screw cap from loosening, thereby ensuring the positioning effect of the crimping portion set at the end of the screw cap on the double-lip oil seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0024] Figure 2 This is a schematic diagram of the end cover structure of the utility model;

[0025] Figure 3 It is an enlarged schematic diagram of part A of the utility model;

[0026] Figure 4 It is a schematic diagram of the disassembly of the utility model;

[0027] Figure 5 It is a front view schematic diagram of the twist-off cover of the utility model;

[0028] Figure 6 It is a schematic cross-sectional view of the AA portion of the twist-off cap of the present invention.

[0029] Description of the numbers in the figure:

[0030] 1. Reducer body; 2. Output shaft; 3. End cover; 4. Double-lip oil seal; 5. External thread; 6. Marking groove; 7. Screw cap; 8. Internal thread; 9. Crimping part; 10. Anti-slip teeth; 11. Flat washer; 12. Elastic gasket. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model; it is obvious that the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the utility model without making creative work are within the scope of protection of the utility model.

[0032] Example:

[0033] See also Figure 1-6 A washing machine reducer with a sand-proof oil seal structure comprises a reducer body 1, an output shaft 2 installed at a power output end of the reducer body 1, an end cover 3 installed at the outside of the output shaft 2 and fixedly connected to the reducer body 1, and a double-lip oil seal 4 installed inside the cavity of the end cover 3 and tightly abutting against the output shaft 2, an inner wall of the cavity of the end cover 3 is provided with an identification groove 6, and the identification groove 6 corresponds to the outer edge of the double-lip oil seal 4, and an outer wall of a connection portion of the end cover 3 is provided with an external thread 5;

[0034] The outer side of the external thread 5 is detachably connected with a screw cap 7, the inner wall of the screw cap 7 is provided with an internal thread 8 screwed with the external thread 5, and the edge of the screw cap 7 away from the reducer body 1 is surrounded by a crimping portion 9 that fits tightly with the outer edge of the double-lip oil seal 4;

[0035] It should be noted that the double-lip oil seal 4 is assembled into the cavity of the end cover 3 by using a clamp so that the outer edge of the double-lip oil seal 4 completely covers the marking groove 6, so as to ensure that the axis of the double-lip oil seal 4 and the axis of the output shaft 2 are located on the same straight line, thereby ensuring a good sealing effect of the double-lip oil seal 4;

[0036] The screw cap 7 is screwed with the external thread 5 provided at the end cover 3 by means of the internal thread 8. The crimping portion 9 is pressed against the outer edge of the double-lip oil seal 4 by screwing in the screw cap 7, so as to position the double-lip oil seal 4 and avoid displacement of the double-lip oil seal 4. The double-lip oil seal 4 is connected to the impeller of the washing machine through the output shaft 2, so as to have a good barrier effect on the mud and sand in the water seeping out of the impeller, and prevent the mud and sand from entering the reducer body 1 through the output shaft 2, so as to ensure the service life of the reducer body 1.

[0037] like Figure 4 As shown, an elastic gasket 12 in a spiral structure is sleeved between the connecting portion of the end cover 3 and the screw cover 7, and the elastic gasket 12 is tightly abutted against the end cover 3, and a flat gasket 11 is installed between the elastic gasket 12 and the screw cover 7, and the two side surfaces of the flat gasket 11 are tightly fitted with the elastic gasket 12 and the screw cover 7 respectively;

[0038] It should be noted that by rotating the screw cap 7, the elastic gasket 12 and the flat gasket 11 are squeezed, so that the elastic force of the elastic gasket 12 and the flat gasket 11 can effectively prevent the screw cap 7 from loosening, thereby ensuring the positioning effect of the crimping portion 9 set at the end of the screw cap 7 on the double-lip oil seal 4.

[0039] like Figure 3 , Figure 6 As shown, the marking groove 6 is located at the root of the chamfer provided in the cavity;

[0040] The outer edge of the double-lip oil seal 4 corresponds to the root of the chamfer;

[0041] It should be noted that the double-lip oil seal 4 is assembled into the cavity of the end cover 3 by using a clamp so that the outer edge of the double-lip oil seal 4 completely covers the marking groove 6 to ensure that the axis of the double-lip oil seal 4 is on the same straight line as the axis of the output shaft 2, thereby ensuring a good sealing effect of the double-lip oil seal 4. During the installation process, it is necessary to ensure that the chamfer is free of burrs.

[0042] like Figure 6 As shown, the crimping portion 9 and the screw cap 7 are an integrally formed structure, and the inner diameter of the crimping portion 9 is larger than the outer diameter of the output shaft 2;

[0043] It should be noted that wear between the crimping portion 9 and the output shaft 2 should be avoided.

[0044] like Figure 5 As shown, the outer wall of the screw cap 7 is integrally formed with anti-skid teeth 10 at the axial position corresponding to the output shaft 2, and a plurality of anti-skid teeth 10 are arranged at the radial position of the screw cap 7;

[0045] The screw cap 7 is made of stainless steel;

[0046] It should be noted that the provision of the anti-slip teeth 10 can increase the friction between the hand and the screw cap 7 , which is beneficial to the screwing of the screw cap 7 .

[0047] When in use: the double-lip oil seal 4 is assembled into the cavity of the end cover 3 by using a clamp, so that the outer edge of the double-lip oil seal 4 completely covers the marking groove 6, so as to ensure that the axis of the double-lip oil seal 4 and the axis of the output shaft 2 are located on the same straight line, thereby ensuring a good sealing effect of the double-lip oil seal 4;

[0048] The screw cap 7 is screwed with the external thread 5 provided at the end cover 3 by means of the internal thread 8. The crimping portion 9 is pressed against the outer edge of the double-lip oil seal 4 by screwing in the screw cap 7, thereby positioning the double-lip oil seal 4 to prevent the double-lip oil seal 4 from shifting. The output shaft 2 is connected to the impeller of the washing machine through transmission, so that the double-lip oil seal 4 can play a good barrier role against mud and sand in the water seeping from the impeller.

[0049] The above is only a preferred specific implementation of the utility model; however, the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and improved ideas of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model.

Claims

1. A washing machine reducer with a sand-proof oil seal structure, comprising a reducer body (1), an output shaft (2) mounted at a power output end of the reducer body (1), an end cover (3) mounted on the outside of the output shaft (2) and fixedly connected to the reducer body (1), and a double-lip oil seal (4) mounted on the inner side of a cavity of the end cover (3) and in close contact with the output shaft (2), characterized in that: The inner wall of the cavity of the end cover (3) is provided with a marking groove (6), and the marking groove (6) corresponds to the outer edge of the double-lip oil seal (4), and the outer wall of the connection part of the end cover (3) is provided with an external thread (5); The outer side of the external thread (5) is detachably connected to a screw cap (7), the inner wall of the screw cap (7) is provided with an internal thread (8) threadedly connected to the external thread (5), and the edge of the screw cap (7) away from the reducer body (1) is surrounded by a crimping portion (9) that is tightly fitted with the outer edge of the double-lip oil seal (4).

2. A washing machine reducer with a sand-proof oil seal structure according to claim 1, characterized in that: An elastic gasket (12) in a spiral structure is sleeved between the connecting portion of the end cover (3) and the screw cover (7), and the elastic gasket (12) is in tight contact with the end cover (3).

3. A washing machine reducer with a sand-proof oil seal structure according to claim 2, characterized in that: A flat washer (11) is installed between the elastic washer (12) and the screw cap (7), and the two side surfaces of the flat washer (11) are tightly fitted to the elastic washer (12) and the screw cap (7) respectively.

4. The washing machine reducer with anti-sand oil seal structure according to claim 1, characterized in that: The marking groove (6) is located at the root of the chamfer provided on the cavity; The outer edge of the double-lip oil seal (4) corresponds to the root of the chamfer.

5. The washing machine reducer with anti-sand oil seal structure according to claim 1, characterized in that: The crimping portion (9) and the screw cap (7) are an integrally formed structure, and the inner diameter of the crimping portion (9) is greater than the outer diameter of the output shaft (2).

6. The washing machine reducer with anti-sand oil seal structure according to claim 1, characterized in that: An anti-slip tooth (10) is integrally formed on the outer wall of the screw cap (7) at an axial position corresponding to the output shaft (2), and a plurality of the anti-slip teeth (10) are arranged at a radial position of the screw cap (7).

7. The washing machine reducer with anti-sand oil seal structure according to claim 1, characterized in that: The screw cap (7) is made of stainless steel.

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