CN111088660A

CN111088660A - Washing machine shock absorber

Info

Publication number: CN111088660A
Application number: CN202010023484.7A
Authority: CN
Inventors: 王祥
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-01-09
Filing date: 2020-01-09
Publication date: 2020-05-01

Abstract

The embodiment of the invention discloses a washing machine shock absorber, which relates to the technical field of washing machines and comprises an outer tube, an upper cover, a friction ring and a piston rod, wherein the outer tube is provided with a first cavity and a second cavity which are communicated, the first cavity is positioned at the end part of the outer tube, the upper cover is arranged in the first cavity, the upper cover is provided with a through hole and an installation groove, the friction ring is arranged in the installation groove, the two ends of the friction ring are provided with wavy end faces, one end of the piston rod penetrates through the upper cover and the friction ring and then is inserted into the second cavity, and a rod body of the piston rod is tightly attached. In the reversing process, the wavy end face of the friction ring is elastically deformed, the friction ring moves along with the piston rod, then the friction ring moves relative to the piston rod, the static friction force of the piston rod on the friction ring is increased from 0 to the dynamic friction force, the reversing impact on the piston rod is reduced, and further the vibration and the noise are correspondingly reduced.

Description

Washing machine shock absorber

Technical Field

The embodiment of the invention relates to the technical field of washing machines, in particular to a washing machine shock absorber.

Background

With the development of technology, the quality of life of people is gradually improved, and the vibration and noise of the washing machine are main indexes for measuring the quality of the washing machine.

At present, the drum washing machines produced by domestic washing machine manufacturers mostly use piston type damping shock absorbers. The principle of the piston type damping shock absorber is as follows: the piston rod and the outer pipe generate relative displacement, and the friction force (dynamic friction) between the friction ring (an open ring formed by bending the damping friction strip) and the piston rod immediately reaches the maximum value. When the motion direction of the piston rod is changed, the direction of the friction force is changed, the reversing impact is large, and the washing machine vibrates and generates noise.

In the actual use process, when the drum washing machine spin-dries, the inner barrel is only unbalanced in a small amount, and the shock absorber only needs to provide small friction force in a certain working stroke, so that the shock and noise of the washing machine are reduced, and the shock absorber used in the current market cannot achieve the effect.

Disclosure of Invention

Therefore, the embodiment of the invention provides a washing machine shock absorber to solve the problems of large reversing impact caused by change of the motion direction of a piston rod and large noise and vibration during spin-drying after dehydration in the prior art.

In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:

according to a first aspect of the embodiment of the invention, the shock absorber for the washing machine comprises an outer tube, an upper cover, a friction ring and a piston rod, wherein the outer tube is provided with a first cavity and a second cavity, one end of the first cavity is located at the end part of the outer tube, the other end of the first cavity is communicated with the second cavity, the upper cover is arranged in the first cavity and is provided with a through hole and an installation groove arranged along the circumferential direction of the through hole, the friction ring is arranged in the installation groove, the two ends of the friction ring are provided with wavy end faces, one end of the piston rod penetrates through the upper cover and the friction ring and is inserted into the second cavity, and a rod body of the piston rod is tightly attached to the friction ring.

Furthermore, the shock absorber still includes two rubber spares, one the rubber spare sets up in the one end of keeping away from the piston rod of outer tube, another the rubber spare sets up in the one end of keeping away from the outer tube of piston rod.

Further, the outer tube comprises a first tube body and a second tube body, the first tube body is arranged at one end of the second tube body, the first tube body and the second tube body are coaxial, the first cavity is arranged in the first tube body, the second cavity is arranged in the second tube body, the first cavity and the second cavity are coaxial, and the end portion, far away from the second cavity, of the first cavity is located at the end portion, far away from the second tube body, of the first tube body.

Further, the outer diameter of the first pipe body is larger than the outer diameter of the second pipe body, and the inner diameter of the first chamber is larger than the inner diameter of the second chamber.

Further, the first pipe body and the second pipe body are integrally formed.

Further, the upper cover includes lid body and buckle, the through-hole set up in the center of lid body, the buckle is equipped with a plurality ofly, every the buckle all set up in one side towards the outer tube of lid body, and a plurality of buckles are followed the axis evenly distributed of body is in order to form the space cylinder, and the internal diameter that forms the space cylinder is greater than the internal diameter of through-hole is in order to form the mounting groove.

Furthermore, a clamping groove matched with the buckle for use is arranged in the first cavity.

Furthermore, four buckles and four clamping grooves are arranged.

Further, lubricating grease is arranged at the gap between the wavy end face and the mounting groove.

The embodiment of the invention has the following advantages:

according to the washing machine damper provided by the embodiment of the invention, in the reversing process, the wavy end surface of the friction ring is elastically deformed, the friction ring moves along with the piston rod at first, then the friction ring and the piston rod move relatively, the static friction force of the piston rod on the friction ring is increased from 0 to the dynamic friction force, the reversing impact on the piston rod is reduced, and further the vibration and the noise are correspondingly reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so that those skilled in the art can understand and read the present invention, and do not limit the conditions for implementing the present invention, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the functions and purposes of the present invention, should still fall within the scope covered by the contents disclosed in the present invention.

Fig. 1 is a schematic structural view of a washing machine damper according to embodiment 1 of the present invention;

fig. 2 is a schematic structural view of the friction ring after being unfolded.

In the figure: 1-outer tube, 2-upper cover, 3-friction ring, 4-piston rod, 5-rubber piece, 6-wave end face.

Detailed Description

The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the present specification, the terms "upper", "lower", "left", "right", "middle", and the like are used for clarity of description, and are not intended to limit the scope of the present invention, and changes or modifications in the relative relationship may be made without substantial changes in the technical content.

Example 1

As shown in fig. 1 and 2, embodiment 1 provides a washing machine damper including an outer tube 1, an upper cap 2, a friction ring 3, and a piston rod 4. Outer tube 1 is equipped with first cavity and second cavity, the one end of first cavity is located the tip of outer tube 1, the other end of first cavity and the intercommunication of second cavity, upper cover 2 sets up in first cavity, upper cover 2 is equipped with the through-hole and follows the mounting groove that through-hole circumference set up, friction ring 3 sets up in the mounting groove, the both ends of friction ring 3 are equipped with wave terminal surface 6, insert after the through-hole of upper cover 2 and friction ring 3 of piston rod 4 are passed and locate the second cavity, and the pole body of piston rod 4 closely laminates with friction ring 3. The friction ring 3 can be made of a sponge strip.

In the process of damping, the piston rod makes reciprocating motion in the outer tube, and when the motion direction changes, the piston rod moves downwards first and then moves upwards is taken as an example. In the existing shock absorber, the friction ring is static relative to the outer tube and the upper cover, and in the downward movement process of the piston rod, a dynamic friction force exists between the piston rod and the friction ring, and it is assumed that the piston rod is subjected to an upward dynamic friction force F1; when the piston rod moves upwards, the piston rod is subjected to downward dynamic friction force F1; the piston rod is subjected to two F1 with opposite directions at the moment of reversing, namely, the reversing impact force of F1+ F1, so that vibration and noise are caused. In the shock absorber of the embodiment, the piston rod 4 is subjected to upward dynamic friction force F1 during the downward movement process; when the piston rod 4 moves upwards, the wavy end surface 6 on the upper side of the friction ring 3 and the groove wall of the mounting groove are firstly extruded, the wavy end surface 6 is elastically deformed, the elastic deformation causes an elastic force F2, the elastic force F2 is increased along with the increase of the elastic deformation, the elastic force F2 is increased from 0 to F1, and the friction ring 3 moves along with the piston rod 4; the friction ring 3 is downward when being subjected to F2, and the friction force F3 of the piston rod 4, which is received by the friction ring 3, is upward when the friction ring 3 is in a force balance state, but the numerical values of F3 and F2 are equal; since the forces are reciprocal, the friction force experienced by the piston rod 4 in this phase is F3 downwards, whereas F3 and F2 are of equal value; after F2 equals F1, the wavy end surface 6 of the friction ring 3 is no longer elastically deformed; when F2 is greater than F1, the friction ring 3 is stationary relative to the outer tube 1 and the upper cap 2, the friction ring 3 and the piston rod 4 move relatively, and the piston rod 4 is subjected to downward dynamic friction F1. In the reversing process, the static friction force F3 of the friction ring 3 on the piston rod 4 is equal to F2, F2 is equal to or more than 0 and equal to or less than F3 and equal to or more than F1, the friction force on the piston rod 4 at the moment of reversing is F2 or F3, namely in the reversing process, the reversing impact on the piston rod 4 is F1+ F2 or F1+ F3, and F2 is equal to or more than F3 and equal to or less than F1, so that compared with the reversing impact force of F1+ F1 of the existing shock absorber, the reversing impact is reduced, and the vibration and the noise are correspondingly reduced due to the reduction of the reversing impact.

In this embodiment, the damper further includes two rubber members 5, one rubber member 5 is disposed at one end of the outer tube 1 away from the piston rod 4, the other rubber member 5 is disposed at one end of the piston rod 4 away from the outer tube 1, and the two rubber members 5 are respectively used for being connected to the casing and the inner tube of the washing machine, and are made of rubber materials, so as to reduce vibration to a certain extent, thereby reducing noise.

In this embodiment, the outer tube 1 includes a first tube and a second tube, the first tube is disposed at one end of the second tube, and the first tube and the second tube are coaxial, the first cavity is disposed in the first tube, the second cavity is disposed in the second tube, and the first cavity and the second cavity are coaxial, wherein the end of the first cavity far away from the second cavity is located at the end of the first tube far away from the second tube. Wherein, the external diameter of first body is greater than the external diameter of second body, and the internal diameter of first cavity is greater than the internal diameter of second cavity, so can set up upper cover 2 in first cavity. The first pipe body and the second pipe body are integrally formed, so that the connection strength is enhanced immediately, and the manufacturing cost can be reduced.

In this implementation, upper cover 2 includes lid body and buckle, and the through-hole sets up in the center of lid body, and the buckle is equipped with a plurality ofly, and every buckle all sets up in one side of lid body towards outer tube 1, and the axis evenly distributed of a plurality of buckles along the body is in order to form the space cylinder, and the internal diameter that forms the space cylinder is greater than the internal diameter of through-hole in order to form the mounting groove. In an alternative embodiment, the mounting groove has only one groove wall, with the side wavy end face 6 of the friction ring 3 interacting with the groove wall and the other side wavy end face 6 of the friction ring 3 interacting with the bottom end face of the first chamber. A clamping groove matched with the buckle for use is arranged in the first cavity. Preferably, four buckles and four clamping grooves are arranged.

In order to prolong the service life and reduce the abrasion, lubricating grease is arranged at the gap between the wavy end surface 6 and the mounting groove.

Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims

1. The utility model provides a washing machine bumper shock absorber, its characterized in that, the bumper shock absorber includes outer tube, upper cover, friction ring and piston rod, the outer tube is equipped with first cavity and second cavity, the one end of first cavity is located the tip of outer tube, the other end of first cavity and the intercommunication of second cavity, the upper cover sets up in first cavity, the upper cover is equipped with the through-hole and follows the mounting groove that through-hole circumference set up, the friction ring sets up in the mounting groove, and the both ends of friction ring are equipped with the wave terminal surface, insert after passing upper cover and friction ring, locate the second cavity in the one end of piston rod, just the pole body and the friction ring of piston rod closely laminate.

2. The washing machine damper according to claim 1, further comprising two rubber members, one of the rubber members being disposed at an end of the outer tube remote from the piston rod, and the other of the rubber members being disposed at an end of the piston rod remote from the outer tube.

3. The washing machine shock absorber of claim 1, wherein the outer tube comprises a first tube and a second tube, the first tube is disposed at one end of the second tube and the first tube and the second tube are coaxial, the first chamber is disposed within the first tube, the second chamber is disposed within the second tube, the first chamber and the second chamber are coaxial, wherein an end of the first chamber distal from the second chamber is located at an end of the first tube distal from the second tube.

4. The washing machine damper as claimed in claim 3, wherein an outer diameter of the first tube is larger than an outer diameter of the second tube, and an inner diameter of the first chamber is larger than an inner diameter of the second chamber.

5. The washing machine damper as claimed in claim 3, wherein the first tube and the second tube are integrally formed.

6. The washing machine shock absorber according to claim 3, wherein the upper cover comprises a cover body and a plurality of buckles, the through hole is provided in the center of the cover body, each buckle is provided on a side of the cover body facing the outer tube, and the plurality of buckles are uniformly distributed along the axis of the body to form a space cylinder, and the inner diameter of the space cylinder is larger than that of the through hole to form the mounting groove.

7. The washing machine damper as claimed in claim 6, wherein a snap fit slot is provided in the first chamber.

8. The washing machine damper as claimed in claim 7, wherein the number of the snaps and the catching grooves is four.

9. The washing machine damper according to any one of claims 1 to 8, wherein grease is provided at a gap between the wavy end surface and the mounting groove.