U.S. patent application number 16/964606 was filed with the patent office on 2021-02-25 for hydraulic self-adaptive adjusting foot.
The applicant listed for this patent is WIN BALANCE ENTERPRISE CO., LTD. Invention is credited to Wei CHEN, Chunlei WANG, Jing YANG.
Application Number | 20210052074 16/964606 |
Document ID | / |
Family ID | 1000005211826 |
Filed Date | 2021-02-25 |
United States Patent
Application |
20210052074 |
Kind Code |
A1 |
CHEN; Wei ; et al. |
February 25, 2021 |
HYDRAULIC SELF-ADAPTIVE ADJUSTING FOOT
Abstract
The invention discloses a hydraulic self-adaptive adjusting foot
wherein an upper cover is arranged at the upper end of the bottom
shell, a piston body arranged in the bottom shell and a piston ring
seal arranged between outer circumferential face of piston body and
inner wall of bottom shell; a return spring is arranged between
bottom of the piston body and the bottom shell while the bottom end
of the support post penetrates into the bottom shell from the
center hole of the upper cover in a sealing mode. A groove is
provided in the center of bottom surface of the flange at bottom
end of said support post and a steel ball return spring is set in
said groove; in the middle of bottom surface of piston body is
provided with spring groove in which sets the top end of return
spring; at the axis of spring groove sets the hydraulic oil passage
between top end of which and bottom end of steel ball return spring
arranges the steel ball. The invention has following merits: the
hydraulic oil flows and migrates in upper and lower piston chambers
via hydraulic oil passage controlled by steel ball joint work of
which and return spring enables supporting objects reach stable
state and bottom foot's height be automatically adjusted; the
appearance of invention is simple and compact, suitable for
repeating adjustments.
Inventors: |
CHEN; Wei; (Qingdao,
Shandong, CN) ; YANG; Jing; (Qingdao, Shandong,
CN) ; WANG; Chunlei; (Qingdao, Shandong, CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
WIN BALANCE ENTERPRISE CO., LTD |
Qingdao, Shandong |
|
CN |
|
|
Family ID: |
1000005211826 |
Appl. No.: |
16/964606 |
Filed: |
January 23, 2019 |
PCT Filed: |
January 23, 2019 |
PCT NO: |
PCT/CN2019/072773 |
371 Date: |
July 24, 2020 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
A47B 91/16 20130101;
A47B 91/02 20130101 |
International
Class: |
A47B 91/16 20060101
A47B091/16; A47B 91/02 20060101 A47B091/02 |
Foreign Application Data
Date |
Code |
Application Number |
Sep 18, 2018 |
CN |
201811085337.1 |
Claims
1. A hydraulic self-adaptive adjusting foot comprises a bottom
shell, an upper cover, a support post, a return spring, a piston
body and a piston ring seal wherein the upper cover is arranged at
the upper end of the bottom shell with openings, the piston body
arranged in the bottom shell and a piston ring seal arranged
between outer circumferential face of piston body and inner wall of
bottom shell; a return spring is arranged between bottom of the
piston body and the bottom shell while the bottom end of the
support post penetrates slidably into the bottom shell from the
center hole of the upper cover in a sealing mode; the invention is
characterized in that a flange is arranged at the bottom of said
support post and in the center of bottom surface of said flange is
provided with a groove in which a steel ball return spring is
provided; in the middle of bottom surface of piston body is
provided with spring groove in which sets the top end of return
spring; at the axis of spring groove sets the through hole as
hydraulic oil passage between top end of which and bottom end of
steel ball return spring arranges the steel ball.
2. The hydraulic self-adaptive adjusting foot according to claim 1
wherein an upper flange for mounting the bottom end of the return
spring is arranged at the center of the bottom surface inside said
bottom shell.
3. The hydraulic self-adaptive adjusting foot according to claim 1
wherein said upper cover is connected with the upper end of the
bottom shell through threads.
4. The hydraulic self-adaptive adjusting foot according to claim 1
wherein the steel ball return spring is a tower-shaped spring whose
diameter of the small-diameter end is slightly shorter than that of
said steel ball and abuts against the steel ball.
5. The hydraulic self-adaptive adjusting foot according to claim 1
wherein a chamfer matched with the spherical surface of the steel
ball is arranged at the top end of the hydraulic oil passage.
6. The hydraulic self-adaptive adjusting foot according to claim 1
wherein between said support post 2 and the center hole of the
upper cover 4 arranges seal sleeve of upper cover 3; at the inner
circumferential surface of said seal sleeve of upper cover 3 is
provided with at least one annular groove in which the sealing ring
of support post is arranged.
Description
TECHICAL FIELD
[0001] The invention relates to a hydraulic self-adaptive adjusting
foot employed in parts of bases or legs of furniture like tables
and chairs that touches ground to realize purpose of supporting and
stabilizing tables, chairs, and stools; when the ground is not very
flat, the table can be stabilized by virtue of compression from the
weight of objects that the hydraulic self-adaptive adjusting foot
supports (table, chair, workbench, etc.).
BACKGROUND OF THE INVENTION
[0002] In the using process of tables, chairs, and other furniture,
especially usage of tables for commercial purposes, adjustable foot
will be mounted sometimes at the bottom of such furniture so as to
provide a stable using environment for customers; most adjusting
feet in the market are in the form of screws which adjust height
via screwing of screws to achieve stabilization of tables, which is
relatively troublesome and arduous as the screw has to be rotated
by artificial driven or usage of tools.
SUMMARY OF THE INVENTION
[0003] The invention aims to provide a hydraulic self-adaptive
adjusting foot to solve bothering problem of adjusting height via
hand regulation or tools existing in current technology.
[0004] To achieve above purpose, the invention adopts following
technical plan: a hydraulic self-adaptive adjusting foot comprises
a bottom shell, an upper cover, a support post, a return spring, a
piston body and a piston ring seal wherein the upper cover is
arranged at the upper end of the bottom shell, the piston body
arranged in the bottom shell and a piston ring seal arranged
between outer circumferential face of piston body and inner wall of
bottom shell; a return spring is arranged between bottom of the
piston body and the bottom shell while the bottom end of the
support post penetrates slidably into the bottom shell from the
center hole of the upper cover in a sealing mode; the invention is
characterized in that a flange is arranged at the bottom of said
support post and in the center of bottom surface of said flange is
provided with a groove in which a steel ball return spring is
provided; in the middle of bottom surface of piston body is
provided with spring groove in which sets the top end of return
spring; at the axis of spring groove sets the through hole as
hydraulic oil passage between top end of which and bottom end of
steel ball return spring arranges the steel ball.
[0005] An upper flange for mounting the bottom end of the return
spring is arranged at the center of the bottom surface inside said
bottom shell.
[0006] Said upper cover is connected with the upper end of the
bottom shell through threads.
[0007] The steel ball return spring is a tower-shaped spring whose
diameter of the small-diameter end is slightly shorter than that of
said steel ball and abuts against the steel ball.
[0008] A chamfer matched with the spherical surface of the steel
ball is arranged at the top end of the hydraulic oil passage.
[0009] The invention has following advantage: by utilizing the
fluidity and pressure conduction principle of hydraulic oil, the
hydraulic oil migrates in upper and lower piston chamber joint work
of which and return force of return spring enables supporting
objects reach stable state and bottom foot's height be
automatically adjusted; the appearance of invention is simple and
compact, suitable for repeating adjustments.
BRIEF DESCRIPTION OF THE DRAWINGS
[0010] FIG. 1. is an axial section view illustrating the overall
structure of the invention;
[0011] FIG. 2. is an exploded perspective view of the
invention.
[0012] Description of reference numerals: 1. piston ring seal; 2.
support post; 21. flange at the bottom end of the support post; 3.
seal sleeve of upper cover; 4. upper cover; 5. steel ball return
spring; 6. steel ball; 7. piston body; 71. hydraulic oil passage;
8. bottom shell; 9. return spring; 10. sealing ring of support
post.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0013] As shown in FIG.1 and FIG. 2, the invention discloses a
hydraulic self-adaptive adjusting foot comprising a bottom shell 8,
an upper cover 4, a support post 2, a return spring 9, a piston
body 7 and a piston ring seal 1 wherein the upper cover 4 is
arranged at the upper end of the bottom shell 8, the piston body 7
arranged in the bottom shell and the piston ring seal 1 arranged
between outer circumferential face of piston body 7 and inner wall
of bottom shell 8; a return spring 9 is arranged between bottom of
the piston body 7 and the bottom shell 8 while the bottom end of
the support post 2 penetrates slidably into the bottom shell 8 from
the center hole of the upper cover 4 in a sealing mode. The
invention is characterized in that a flange 21 is arranged at the
bottom end of said support post 2 and in the center of bottom
surface of said flange 21 is provided with a groove in which a
steel ball return spring 5 is provided; in the middle of bottom
surface of piston body 7 is provided with spring groove in which
sets the top end of return spring 9; at the axis of spring groove
sets the through hole as hydraulic oil passage 71 between top end
of which and bottom end of steel ball return spring 5 arranges the
steel ball 6; between said support post 2 and the center hole of
the upper cover 4 arranges seal sleeve of upper cover 3; at the
inner circumferential surface of said seal sleeve of upper cover 3
is provided with at least one annular groove in which the sealing
ring of support post is arranged.
[0014] An upper flange for mounting the bottom end of the return
spring 9 is arranged at the center of the bottom surface inside
said bottom shell 8.
[0015] Said upper cover 4 is connected with the upper end of the
bottom shell 8 through threads.
[0016] Said steel ball return spring 5 is a tower-shaped spring
whose diameter of the small-diameter end is slightly shorter than
that of said steel ball 6 and abuts against the steel ball 6.
[0017] A chamfer matched with the spherical surface of the steel
ball 6 is arranged at the top end of the hydraulic oil passage
71.
[0018] In the using process, the top end of support post 2
connected with its supporting objects, the invention features in
adjusting foot's height automatically through hydraulic principle.
To open or close hydraulic oil passage 71 in the middle of piston
body 7 is controlled by a steel ball 6; when the bottom foot is
subject to downward pressure, the piston moves downward and
hydraulic oil in lower piston chamber flows to upper piston chamber
through oil passage; then the steel ball 6 is lifted by upward
pressure from the hydraulic oil and hydraulic oil passage 71 opens.
When the downward force of piston and elastic force of return
spring 9 reach a balance, the piston stops moving and steel ball 6
is reset under effect of steel ball return spring. Thus the bottom
foot reach new stable state and its height is automatically
adjusted. When upper force is withdrawn(supporting object is
lifted), the piston moves upward under effect of return spring 9
and steel ball 6 closes the oil passage, the hydraulic oil at the
upper piston flows to the bottom through periphery of the piston
ring seal 1, thus the pressure of adjusting foot is released and
the piston is reset.
* * * * *