CN112146340A

CN112146340A - Height-adjustable rack and refrigerator

Info

Publication number: CN112146340A
Application number: CN201910566914.7A
Authority: CN
Inventors: 毕云龙; 王淼; 王金海; 丁春磊; 李晓宾; 付丽英
Original assignee: Haier Smart Home Co Ltd; Qingdao Haier Molds Co Ltd
Current assignee: Kaos Mold Qingdao Co ltd
Priority date: 2019-06-27
Filing date: 2019-06-27
Publication date: 2020-12-29
Anticipated expiration: 2039-06-27
Also published as: CN112146340B

Abstract

The invention relates to a height-adjustable rack, which comprises a pair of lifting devices and a rack plate, wherein the two lifting devices are symmetrically arranged at two sides of the rack plate; the upper guide rail is in limit fit with the sliding cavity, and the upper guide rail can slide up and down relative to the sliding cavity; the cam is arranged between the upper guide rail and the lower guide rail and is in rolling fit with the upper guide rail and the lower guide rail; the lower guide rail is provided with a pushing structure which can push the lower guide rail to slide; when the lower guide rail slides, the cam rotates and enables the upper guide rail to move in the vertical direction, and the object placing plate is connected with the upper guide rail and keeps synchronous movement with the upper guide rail. The invention also relates to a refrigerator provided with the rack. The rack of the invention has adjustable height, simple structure, good bearing effect and low manufacturing cost.

Description

Height-adjustable rack and refrigerator

Technical Field

The invention relates to household appliances, in particular to a rack with adjustable height and a refrigerator.

Background

In order to improve the utilization rate of the internal space of the existing household refrigerator, a special rack is generally arranged in the refrigerator, the rack of the common refrigerator is generally clamped in an inner container of the refrigerator in a pluggable mode, the height of the rack is determined by the position of a clamping groove and cannot be adjusted, so that under certain conditions, articles cannot be smoothly placed on the rack due to the fact that the reserved height of the rack is not enough, and the situation of space waste can occur if the rack is removed. At present, some high-end refrigerators are provided with a liftable electric rack in an inner container, and the electric rack is provided with the following application numbers: 201611037914.0 discloses a synchronous lifting system for refrigerator racks, which comprises: controller, rack body and two at least elevating system, elevating system includes: the rack body is assembled with the lifting mechanism, the connecting piece is sleeved on the guide rod in a sliding manner, the sliding nut is sleeved on the transmission screw rod, and the motor drives the transmission screw rod to rotate to drive the sliding nut to lift so as to drive the rack body to move along the guide rod; the controller is configured to control the rotation speed and the number of steps of each motor to gradually approach synchronization according to the rotation speed and the number of steps of the corresponding motor fed back by each sensor. Although the problem that the height of the rack is not adjustable is solved, the structure of the electric device is complex, and the inside of the refrigerator is easy to frost, so that the failure of the lifting mechanism is easily caused, the reliability of use is low, the manufacturing cost is high, and the later maintenance is troublesome.

The invention is therefore set forth in this light.

Disclosure of Invention

It is an object of the present invention to overcome the disadvantages of the prior art and to provide a height adjustable rack, which can manually adjust the height of the rack, and has a simple structure, convenient use and low manufacturing cost.

Another object of the present invention is to provide a refrigerator equipped with the above-mentioned rack.

In order to achieve the first purpose, the invention adopts the following technical scheme:

a rack with adjustable height comprises a pair of lifting devices and a rack plate, wherein the two lifting devices are symmetrically arranged at two sides of the rack plate and drive the rack plate to lift, the lifting devices comprise,

the shell is internally provided with a strip-shaped sliding cavity, and at least the upper end of the sliding cavity is an opening;

a lower guide rail mounted in the slide cavity, the lower guide rail being configured to be slidable along a length direction of the slide cavity;

the upper guide rail is positioned above the lower guide rail, the upper guide rail is in limit fit with the sliding cavity, and the upper guide rail can slide up and down relative to the sliding cavity;

the cam is arranged between the upper guide rail and the lower guide rail and is in rolling fit with the upper guide rail and the lower guide rail;

the lower guide rail is provided with a pushing structure which can push the lower guide rail to slide; when the lower guide rail slides, the cam rotates and enables the upper guide rail to move in the vertical direction, and the object placing plate is connected with the upper guide rail and keeps synchronous movement with the upper guide rail.

Furthermore, the shell is further provided with a locking structure, one side of the lower guide rail is provided with a plurality of positioning holes which are horizontally arranged, and the locking structure is matched with the positioning holes so as to limit the lower guide rail to slide in the sliding cavity.

Furthermore, the locking structure is an elastic component arranged on the shell, one end of the elastic component is connected with the shell, the other end of the elastic component is a free end, a buckle is arranged at the free end of the elastic component, and the buckle can be clamped into the positioning hole to form positioning fit; the back of the buckle is provided with a handle, the elastic component can be deformed by pushing the handle, and the buckle is separated from the positioning hole.

Further, a return spring is further installed at one end of the lower guide rail, and the return spring is located in the sliding cavity and used for enabling the lower guide rail to return to one side of the sliding cavity.

Further, one side of sliding cavity is equipped with a bar hole, promote the structure for setting up the protruding piece in bottom rail one side, protruding piece stretches out to the outside of sliding cavity through the bar hole, can make the bottom rail slide in sliding cavity through promoting protruding piece.

Furthermore, the rolling surface of the cam is a tooth-shaped surface, the lower surface of the upper guide rail and the upper surface of the lower guide rail are respectively provided with teeth matched with the tooth-shaped surface, and at least one pair of cams are arranged between the upper guide rail and the lower guide rail and are arranged back and forth along the length direction of the sliding cavity.

Furthermore, a clamping groove is formed at the upper end part of the upper guide rail, the edge of the shelf plate is inserted into the clamping groove, and the edge of the shelf plate and the clamping groove are in interference fit.

Further, the lower guide rails of the two lifting devices are connected through a synchronizing rod to keep synchronous movement.

Furthermore, one end of the lower guide rail is bent upwards to form an L-shaped structure, the synchronizing rod is inserted into the upper end of the lower guide rail, and a groove or a through hole for avoiding the synchronizing rod is further formed in the shell.

In order to achieve the second purpose, the invention adopts the following technical scheme:

the refrigerator is provided with the rack with the adjustable height and further comprises an inner container, a supporting structure is arranged on the side wall of the inner container, and the shell is fixedly clamped on the supporting structure.

After the technical scheme of the invention is adopted, the following beneficial effects are brought:

the rack with the adjustable height adopts a manual adjustment mode to adjust the height of the rack, does not have an electric appliance element, has good reliability and low manufacturing cost, can fully utilize the space in the refrigerator, improves the utilization rate of the space in the refrigerator, has simple structure and good bearing capacity, is purely manually operated in the adjustment process, is flexible and convenient, has low installation and maintenance cost, is installed by clinging to the inner container wall, does not influence the beautiful effect of the internal structure, and is simple and practical.

Drawings

FIG. 1: the structure diagram of the first embodiment of the invention;

FIG. 2: the structure diagram of the lifting device of the first embodiment of the invention;

FIG. 3: is an exploded view of fig. 2;

FIG. 4: a left view of the lifting device of the first embodiment of the present invention;

FIG. 5: is a cross-sectional view taken along plane a-a of fig. 4;

FIG. 6: a top view of the lifting device of the first embodiment of the present invention;

FIG. 7: is a cross-sectional view taken along plane B-B of fig. 6;

FIG. 8: the structure diagram of the lifting device of the second embodiment of the invention;

FIG. 9: is an exploded view of fig. 8;

FIG. 10: is an enlarged view of a portion Y of FIG. 9;

FIG. 11: the invention discloses a matching schematic diagram of a refrigerator inner container and a rack;

FIG. 12: another matching schematic diagram of the refrigerator inner container and the rack of the invention;

wherein: 1. the device comprises a shelf 2, a lifting device 3, a synchronizing rod 4, an inner container 21, a shell 22, a lower guide rail 23, an upper guide rail 24, a cam 25, a locking structure 26, a return spring 27, a support rod 21a, a sliding cavity 21b, a strip-shaped hole 21c, a vertical convex rib 21d, a clamping structure 22a, a pushing structure 22b, a positioning hole 23a, a vertical groove 41 and a supporting structure.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

Example one

As shown in fig. 1 to 3, a height-adjustable rack comprises a pair of lifting devices 2 and a rack 1, wherein the two lifting devices 2 are symmetrically arranged on two sides of the rack 1 and drive the rack 1 to lift. The shelf 1 is a square plate, and the lifting device 2 includes a rectangular housing 21, a lower guide rail 22, a cam 24, an upper guide rail 23 and a return spring 26.

An elongated slide chamber 21a is formed inside the housing 21, and at least the upper end of the slide chamber 21a is open. The lower guide rail 22 is installed at the bottom of the slide chamber 21a and can slide horizontally in the slide chamber 21a, and the width of the lower guide rail 22 is the same as that of the slide chamber 21a, so that the lower guide rail 22 can only slide back and forth in the slide chamber 21a, i.e., along the length of the slide chamber 21 a. Preferably, the bottom of the lower guide rail 22 is a T-shaped groove, and the bottom of the sliding cavity 21a is a T-shaped rail, which are matched with each other.

The upper guide rail 23 is located above the lower guide rail 22, the upper guide rail 23 is in limit fit with the sliding cavity 21a, so that the upper guide rail 23 cannot slide back and forth relative to the sliding cavity 21a and can only slide up and down, wherein the limit fit mode can be various, in this embodiment, the length of the upper guide rail 23 is the same as that of the sliding cavity 21a, and the front end and the rear end of the upper guide rail 23 are respectively in contact with the inner wall of the sliding cavity 21a so as to limit the upper guide rail 23 to slide relative to the sliding cavity 21a in the front-rear direction.

The cam 24 is installed between the upper guide rail 23 and the lower guide rail 22, the cam 24 is in rolling fit with the upper guide rail 23 and the lower guide rail 22, the cam 24 plays a role in supporting the upper guide rail 23, when the cam 24 rotates, the distance between the upper guide rail 23 and the lower guide rail 22 can be changed, the upper guide rail 23 moves up and down, and the lifting function is achieved.

The lower guide rail 22 is provided with a pushing structure 22a capable of pushing the lower guide rail 22 to slide. The pushing structure 22a is pushed by hand, when the lower guide rail 22 is pushed by hand to slide, the cam 24 rotates and enables the upper guide rail 23 to move in the vertical direction, the storage plate 1 is connected with the upper guide rail 23 and keeps synchronous movement with the upper guide rail 23, and the storage plate 1 can be located at different heights by adjusting the position of the lower guide rail 22.

Specifically, promote structure 22a for setting up the protruding piece in lower guideway 22 one side, be equipped with anti-skidding stripe on the surface of protruding piece, one side of sliding cavity 21a is equipped with a bar hole 21b, the protruding piece stretches out to the outside of sliding cavity 21a through bar hole 21b, and the protruding piece can slide in bar hole 21b, can make lower guideway 22 slide in sliding cavity 21a through promoting the protruding piece.

As shown in connection with fig. 4 and 5. In order to prevent the position of the storage plate 1 from changing after the action force of a human hand is removed, a locking structure 25 is further arranged on the housing 21 and used for locking the lower guide rail 22, a plurality of positioning holes 22b which are horizontally arranged are formed in one side of the lower guide rail 22, and the locking structure 25 is matched with the positioning holes 22b to limit the lower guide rail 22 to slide in the sliding cavity 21 a. In other embodiments, the lower rail 22 may be configured to have an interference fit with the sliding cavity 21a, and the self-locking is achieved by using the friction force between the two.

Preferably, the locking structure 25 is an elastic member disposed on the housing 21, one end of the elastic member is connected to the housing 21, and the other end is a free end and can move relative to the housing 21. At the free end of the elastic member, a buckle is provided, which can be snapped into the positioning hole 22b and form a positioning fit, preferably, the positioning hole 22b is a wedge-shaped hole, so that the locking structure 25 can only lock the lower guide rail 22 in a single direction. A pull handle is provided on the back of the clip, and the elastic member is deformed by pushing the pull handle to separate the clip from the positioning hole 22 b.

Referring to fig. 6 and 7, the return spring 26 is installed at one end of the lower rail 22 and located at the rear side of the sliding cavity 21a for pushing the lower rail 22 to return, one end of the return spring 26 abuts against the inner wall of the sliding cavity 21a, and the other end abuts against the end of the lower rail 22, in order to prevent the return spring 26 from twisting, a support rod 27 is further sleeved inside the return spring 26, when the return spring 26 is compressed, the support rod 27 can extend into the lower rail 22, and the return spring 26 pushes the lower rail 22 to one side in front of the sliding cavity 21a by its own elastic force.

Preferably, the rolling surface of the cam 24 is a toothed surface, the lower surface of the upper rail 23 and the upper surface of the lower rail 22 are respectively provided with teeth matched with the toothed surface, and at least one pair of cams 24 is arranged between the upper rail 23 and the lower rail 22 and arranged back and forth along the length direction of the sliding cavity 21 a.

Preferably, a clamping groove is formed at the upper end of the upper guide rail 23, the clamping groove is U-shaped, the edge of the shelf board 1 is inserted into the clamping groove, and the two are in interference fit.

In order to prevent the rack 1 from being inclined when it is lifted, the lower guide rails 22 of the two lifting devices 2 are connected by a synchronizing bar 3 to maintain synchronous movement.

Preferably, one end of the lower guide rail 22 is bent upwards to form an L-shaped structure, the synchronization rod 3 is inserted into the upper end of the lower guide rail 22 and abuts against the lower side of the storage tray 1, a groove or a through hole for avoiding the synchronization rod 3 is further formed in the housing 21, and when the lower guide rail 22 slides, the synchronization rod 3 also slides.

Example two

Referring to fig. 8 to 10, the limiting and matching manner of the upper guide rail 23 and the sliding cavity 21a in this embodiment is different from that in the first embodiment, a vertical groove 23a is formed in one side of the upper guide rail 23, a vertical rib 21c having the same width as the vertical groove 23a is formed in the inner wall of the sliding cavity 21a, and the vertical groove 23a and the vertical rib 21c are in up-and-down sliding fit to limit that the upper guide rail 23 can only slide up and down relative to the sliding cavity 21 a.

As shown in fig. 11, the present invention further relates to a refrigerator, wherein the refrigerator is provided with the height-adjustable rack in any one of the above embodiments, the refrigerator further comprises an inner container 4, a supporting structure 41 is arranged on a side wall of the inner container 4, the housing 21 is fixedly clamped on the supporting structure 41, specifically, the supporting structure 41 is a horizontally arranged supporting rib, and a clamping structure 21d is arranged at the bottom of the housing 21 and is clamped and matched with the supporting rib.

In one embodiment, the clamping structure 21d is a positioning protrusion arranged at the front end of the housing 21, the positioning protrusion is in contact fit with the end of the support rib, and when the pushing structure 22a is pushed by a hand, the positioning protrusion is clamped on the support rib to limit the movement of the housing 21.

As shown in fig. 12, in another embodiment, the clamping structure 21d is a positioning protrusion disposed at a middle position of the bottom of the housing 21, the positioning protrusion is provided with a groove matched with the positioning protrusion on the supporting rib, the positioning protrusion is inserted into the groove to form a positioning fit, and when the pushing structure 22a is pushed by a hand, the positioning protrusion is clamped in the groove to limit the movement of the housing 21.

The foregoing is directed to embodiments of the present invention, and it is understood that various changes and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention.

Claims

1. A rack with adjustable height comprises a pair of lifting devices and a rack plate, wherein the two lifting devices are symmetrically arranged on two sides of the rack plate and drive the rack plate to lift, and the rack is characterized in that: the lifting device comprises a lifting device and a lifting device,

2. A height adjustable rack according to claim 1, wherein: the shell is further provided with a locking structure, one side of the lower guide rail is provided with a plurality of positioning holes which are horizontally arranged, and the locking structure is matched with the positioning holes so as to limit the lower guide rail to slide in the sliding cavity.

3. A height adjustable rack according to claim 2, wherein: the locking structure is an elastic component arranged on the shell, one end of the elastic component is connected with the shell, the other end of the elastic component is a free end, a buckle is arranged at the free end of the elastic component, and the buckle can be clamped into the positioning hole to form positioning fit; the back of the buckle is provided with a handle, the elastic component can be deformed by pushing the handle, and the buckle is separated from the positioning hole.

4. A height adjustable rack according to claim 1, wherein: and one end of the lower guide rail is also provided with a return spring, and the return spring is positioned in the sliding cavity and used for returning the lower guide rail to one side of the sliding cavity.

5. A height adjustable rack according to claim 1, wherein: one side of sliding cavity is equipped with a bar hole, promote the structure for setting up the protruding piece in bottom rail one side, protruding piece stretches out to the outside of sliding cavity through the bar hole, can make the bottom rail slide in sliding cavity through promoting protruding piece.

6. A height adjustable rack according to claim 1, wherein: the rolling surface of the cam is a tooth-shaped surface, the lower surface of the upper guide rail and the upper surface of the lower guide rail are respectively provided with teeth matched with the tooth-shaped surface, and at least one pair of cams are arranged between the upper guide rail and the lower guide rail and are arranged back and forth along the length direction of the sliding cavity.

7. A height adjustable rack according to claim 1, wherein: the upper end of the upper guide rail forms a clamping groove, the edge of the shelf is inserted into the clamping groove, and the edge of the shelf and the clamping groove are in interference fit.

8. A height adjustable rack according to claim 1, wherein: the lower guide rails of the two lifting devices are connected through a synchronous rod to keep synchronous movement.

9. A height adjustable rack according to claim 8, wherein: one end of the lower guide rail is bent upwards to form an L-shaped structure, the synchronizing rod is inserted into the upper end of the lower guide rail, and a groove or a through hole for avoiding the synchronizing rod is further formed in the shell.

10. A refrigerator, characterized in that: the height adjustable rack according to any one of claims 1 to 9, wherein the refrigerator further comprises an inner container, a support structure is provided on a side wall of the inner container, and the housing is fixedly clamped on the support structure.