CN204923658U - Automatic door opener to refrigerator that opens door - Google Patents

Abstract

The utility model belongs to the field of household appliances, in particular to an automatic door-opening device for a side-by-side refrigerator, comprising an upper end cover, a bottom plate, a motor, a worm wheel, a worm, a plane cam, a connecting rod, a spring, a roller, and a double-speed mechanism; the bottom plate is fixed on the refrigerator The motor is fixed on the bottom plate through the motor base; the output shaft of the motor is connected with the worm; the worm wheel is installed on the fixed shaft of the bottom plate, and is meshed with the plane cam for transmission; one side of the plane cam is in the form of a rack, and the other side is made into a curved profile. And it is relatively sliding installation with the bottom plate. The double speed mechanism is made up of gear, rack and push rod. Compared with the prior art, the utility model has the advantages of simple structure, low cost and easy maintenance; the speed of the push rod to open the door can be adjusted through the design, which can realize low initial speed and strong force, and high speed and low force later, so that the door opening process is stable ,Low power consumption.

Description

An automatic door opening device for side-by-side refrigerators

technical field

The utility model belongs to the field of household appliances, in particular to an automatic door opening device for a side-by-side refrigerator.

Background technique

With the constant changes in the market and the rapid development of side-by-side refrigerator companies, side-by-side refrigerators have entered our field of vision. Regardless of the size of the family, the size of the living area, or the price of the product, sales of side-by-side refrigerators have grown rapidly. However, most of the current side-by-side refrigerators have hand-pull doors. When opening the door, due to the heavy weight of the side-by-side refrigerator door and the magnetic force of the magnetic strip on the door seal of the side-by-side refrigerator, it is laborious to open the door manually, especially when the user holds objects with both hands. It is very inconvenient to open the door, especially for the elderly and children at home. In order to solve the disadvantages of the hand-pull refrigerator door, the Chinese patent with the authorized announcement number CN2443126Y has announced an "electromagnetic automatic door opening device", which uses an electromagnet to control a pure iron core to drive a push rod to open the door. The body is opened, the cost is higher, and it is not easy to maintain. The Chinese patent whose authorized notification number is CN203964526U discloses a kind of "automatic door opening device for refrigerator and refrigerator with it", which adopts a series of rack and pinion structures to drive the push rod to push the door body open. The resistance of the refrigerator is constantly changing during the door opening process. The gear is used as the transmission element in this device, so that the speed of the process of pushing the door body is constant, which increases the waste of energy and is not conducive to the stability of the device operation. The application publication number is CN102278033A's invention patent disclosure column "An automatic door opening device and a side-by-side refrigerator using the device". The refrigerator door of this device can only be opened at a small angle rather than fully opened, and the degree of automation is low.

Contents of the invention

The purpose of the utility model is to overcome the above-mentioned deficiencies in the prior art, and provide an automatic door opening device for side-by-side refrigerators with simple structure, low cost and high degree of automation. The device can automatically open the door of the side-by-side refrigerator by 70°-90°.

The technical solution adopted by the utility model to solve its technical problems is as follows:

An automatic door opening device for a side-by-side refrigerator, comprising an upper end cover, a bottom plate, a motor, and a worm; the bottom plate is fixed on the upper surface of the refrigerator; the motor is fixed on the bottom plate through a motor seat, and the output shaft of the motor is connected to the worm; the feature is that it also includes Worm gear, plane cam, connecting rod, roller, double-speed mechanism; the worm gear is a double-layer gear structure, installed on the fixed shaft of the bottom plate, and meshed with the plane cam for transmission; one side of the plane cam is in the form of a rack, and the other side is a curved profile. The plane cam and the base plate are installed in relative sliding; the connecting rod and the base plate are installed in relative sliding, and there are fixed shafts at both ends of the connecting rod; the multi-speed mechanism includes gears, racks, and push rods; the center of the gear is cast with a bearing seat, and the gear passes through the bearing and The fixed shaft on the connecting rod is connected and meshes with the rack and the rack part on the push rod at the same time; the top end of the fixed shaft on the connecting rod is threaded, and the bottom end of the fixed shaft is respectively connected with the roller and the double speed through interference connection. The bearings in the gear center seat in the mechanism are connected, and the top of the fixed shaft is locked with a nut to prevent the rollers or gears from falling off.

The above-mentioned automatic door-opening device for side-by-side refrigerators is characterized in that a spring is installed between the roller and the guide rail on which the connecting rod is installed to realize the automatic retraction of the connecting rod.

The above-mentioned automatic door-opening device for side-by-side refrigerators is characterized in that one end of the push rod is in the shape of a rack, and the other end is in the shape of a rectangular block.

When working, the motor drives the worm to rotate, and then the worm wheel rotates to drive the plane cam to slide. The curved profile side of the plane cam is in contact with the roller. When the cam moves to the curved profile, it can push the connecting rod connected with the roller to slide relatively along the slideway, and then the gear of the double speed mechanism moves; the rack part of the push rod is driven by the gear. Make a linear motion down, and the speed is twice the speed of the connecting rod, so the push rod makes a linear motion to push open the refrigerator door. In addition, the device can also be used to push open a refrigerator with only one door, that is, a non-side-by-side refrigerator, and only need to adopt a part of the original structure.

This automatic door opening device has the following advantages: 1. Simple structure, low cost, easy maintenance; The door opening process is stable and the power consumption is low. At present, there is no side-by-side refrigerator with an automatic door opening mechanism on the market.

Description of drawings:

Fig. 1 is a schematic diagram of the external outline of the utility model;

Fig. 2 is the overall structural representation of the utility model;

Fig. 3 is the structure schematic diagram when the utility model works;

Fig. 4 is a schematic diagram of the internal structure of the utility model;

In the figure: 1—upper cover, 2—bottom plate, 3—motor base, 4—motor, 5—worm, 6—worm gear, 7—lower guide rail a, 8—upper guide rail, 9—plane cam, 10—fixed shaft, 11—roller, 12—connecting rod, 13—gear, 14—support, 15—rack, 16—push rod, 17—spring, 18—lower guide rail b.

Specific implementation plan:

Provide three preferred embodiments of the present utility model below in conjunction with accompanying drawing, but the utility model is not limited to described embodiment.

Embodiment one:

As shown in Fig. 1, Fig. 2, Fig. 3 and Fig. 4, an automatic door opening mechanism for side-by-side refrigerators includes an upper end cover 1, a bottom plate 2, a motor seat 3, a motor 4, a worm screw 5, a worm wheel 6, a plane cam 9, Roller 11, connecting rod 12, spring 17, push rod 16, double speed mechanism.

The motor 4 is fixed on the base plate 2 through the motor base 3 . The output shaft of the motor is directly connected with the worm 5; the worm gear 6 is installed on the fixed shaft 10 and can rotate around the axis; the worm gear 6 is driven by the worm 5 and is meshed with the plane cam 9; the plane cam 9 is installed on the upper guide rail 8 and the lower guide rail 7 In the formed slideway; grooves are cast on the upper guide rail 8 and the lower guide rail 7, and projections are cast on both sides of the plane cam 9, which can cooperate with each other to slide.

The installation method of the connecting rod 12 is the same as that of the planar cam. It is installed in the slideway formed by the upper guide rail 8 and the lower guide rail b18. The upper guide rail 8 and the lower guide rail b18 are cast with grooves, and the two sides of the connecting rod 12 have protrusions, which can cooperate with each other to slide .

The spring 17 is installed between the roller 11 and the lower guide rail b18, and a fixed shaft is cast at the corresponding position of the lower guide rail b18 to install the spring; through the elastic action of the spring, the automatic retraction process of the connecting rod after being pushed out is realized.

The double speed mechanism is made up of gear, rack and push rod. The center of the gear 13 is equipped with a bearing, which is interference fit with the fixed shaft at one end of the connecting rod 12, and is locked with a nut at the top of the fixed shaft to form relative rotation; the rack 15 is fixed on the support 14 with bolts; the push rod 16 is installed in the same way as the connecting rod 12 and the plane cam 9; the push rod is composed of two parts, one part is a rack structure, which is used to mesh with the gear 13, and the other part is a rectangular block, which is used to contact the refrigerator door; The two parts are cast in one piece.

The upper guide rail 8 is directly cast on the upper end cover 1; the lower guide rail 7, the lower guide rail b18, the fixed shaft 10, and the support 14 are directly cast on the bottom plate 2.

Embodiment two:

The push rod 16 of the double-speed mechanism is all cast into a rack form; others are the same as in the first embodiment.

Embodiment three:

Roller 11 is changed into bearing, and other is with embodiment one.

Claims (3)

1. An automatic door-opening device for a side-by-side refrigerator, comprising an upper end cover (1), a base plate (2), a motor seat (3), a motor (4), and a worm screw (5); the base plate (2) is fixed on the upper surface of the refrigerator on; the motor (4) is fixed on the base plate (2) through the motor base (3), and the output shaft of the motor (4) is connected with the worm (5); it is characterized in that it also includes a worm gear (6), a plane cam (9), and a connecting Rod (12), roller (11), spring (17), double-speed mechanism; worm gear (6) is a double-layer gear structure, installed on the fixed shaft of the bottom plate (2), and meshed with the plane cam (9) for transmission; One side of the plane cam (9) is in the form of a rack, and the other side is a curved profile, and the plane cam (9) and the base plate (2) are relatively slidingly installed; the double speed mechanism includes a gear (13), a rack (15), a push rod (16 ); the central position of the gear (13) is cast with a bearing seat, the gear (13) is connected with the fixed shaft on the connecting rod (12) through the bearing, and is connected with the rack on the rack (12) and the push rod (16) The parts are meshed; the two ends of the connecting rod (12) have a fixed shaft, and the top of the fixed shaft has threads; the bottom ends of the two ends of the connecting rod (12) are connected with the roller (11) and the gear ( 13) The bearings in the center are connected, and the top of the fixed shaft on the connecting rod is locked with a nut to prevent the rollers or gears from falling off. 2. An automatic door-opening device for side-by-side refrigerators according to claim 1, characterized in that: a spring (17) is installed between the roller (11) and the lower guide rail b (18) on which the connecting rod (12) is installed , the spring (17) is used to realize the automatic retraction of the connecting rod. 3. The automatic door opening device for side-by-side refrigerators according to claim 1, characterized in that: one end of the push rod (16) is in the shape of a rack, and the other end is in the shape of a rectangular block.