Rotation driving mechanism, shelf lifting structure and refrigerator

Abstract

The utility model discloses a rotation driving mechanism, a shelf lifting structure and a refrigerator, and relates to the technical field of refrigerator shelf lifting, the rotation driving mechanism comprises a first rotation body and a second rotation body; the friction matching structure comprises a first friction part and a second friction part which can be matched with each other, the second friction part is arranged on the end face, facing the first rotating body, of the second rotating body, and the first friction part is fixedly installed, penetrates through the receding hole and then can abut against the second friction part; the torque transmission structure comprises a torque transmission convex part and a torque transmission concave part which are matched with each other, the torque transmission concave part is concavely arranged in the first direction, and the concave depth of the torque transmission concave part is reduced in the circumferential direction of the first rotating body and from the middle of the torque transmission concave part to the edge of the torque transmission concave part; according to the scheme, the problem that the height of the shelf is inconvenient to adjust is solved on the whole.

Description

TECHNICAL FIELD

[0001] The utility model relates to refrigerator shelf lifting technical field, especially in a kind of rotation driving mechanism, shelf lifting structure and refrigerator. BACKGROUND

[0002] Common refrigerator is formed with multiple storage compartments inside, horizontal shelf is arranged in storage compartment, and shelf is plate-shaped, and shelf is usually arranged one or more, by shelf, multiple storage areas are formed inside storage compartment, and the goods in corresponding storage area are placed on shelf. Depending on the size of the goods to be placed, the height of the shelf is usually adjusted to adjust the height of the corresponding storage area, and when the height of the shelf is adjusted, the shelf is usually manually locked after being adjusted to the predetermined height, and the height of the shelf is adjusted inconveniently. SUMMARY

[0003] The main purpose of the utility model is to provide a kind of rotation driving mechanism, shelf lifting structure and refrigerator, to improve the problem that the height of the shelf is inconveniently adjusted.

[0004] To achieve the above object, the rotation driving mechanism provided by the utility model is used in the shelf lifting structure, and the rotation driving mechanism comprises:

[0005] First rotating body and second rotating body are coaxially arranged along the axis of rotation in the first direction, the first rotating body is provided with an avoiding hole, and the second rotating body is provided with a second friction part on the end face facing the first rotating body.

[0006] Friction fitting structure, including the first friction part and the second friction part that can be matched with each other, the second friction part is arranged on the end face of the second rotating body facing the first rotating body, the first friction part is fixedly installed, and can be abutted with the second friction part after being arranged in the avoiding hole.

[0007] Torque transmission structure, including transmission torque convex part and transmission torque concave part that are matched with each other, the transmission torque concave part is concave in the first direction, on the circumference of the first rotating body, and from the middle part of the transmission torque concave part to its edge, the concave depth of the transmission torque concave part is reduced.

[0008] When the first rotating body is fixed, the transmission torque convex part is at the middle position of the transmission torque concave part, the first friction part and the second friction part are abutted and matched, and the second rotating body is fixed relative to the first friction part.

[0009] When the first rotating body rotates, the torque transmission convex part is driven by the first rotating body to move from the middle position of the torque transmission concave part to the edge of the torque transmission concave part and be clamped in the torque transmission concave part, so as to move the second rotating body away from the first rotating body, separate the first friction part and the second friction part, and transmit the torque of the first rotating body to the second rotating body.

[0010] In an embodiment, the torque transmission concave part includes two accommodating grooves arranged on opposite end surfaces of the first rotating body and the second rotating body.

[0011] The torque transmission convex part includes balls arranged in the two accommodating grooves.

[0012] In an embodiment, the torque transmission convex part and the torque transmission concave part are arranged in one-to-one correspondence as a transmission group, a plurality of transmission groups are arranged, and the transmission groups are arranged at intervals along the circumference of the first rotating body.

[0013] In an embodiment, the first friction part includes a friction convex part, the second friction part includes a friction concave part, and the friction convex part can be arranged in the friction concave part.

[0014] In an embodiment, the rotating drive mechanism further includes a first elastic member arranged on the side of the second rotating body away from the first rotating body, so as to abut the second rotating body to the first friction part.

[0015] In an embodiment, the rotating drive mechanism further includes:

[0016] A knob structure including a third rotating body rotatably arranged;

[0017] A fourth rotating body connected to a winding roller in the shelf lifting structure; and

[0018] A gear transmission structure including a plurality of gear sets, each of the gear sets including transmission gear parts meshing with each other.

[0019] In adjacent two gear sets, the transmission gear parts are arranged in the first rotating body and the second rotating body, respectively.

[0020] In an embodiment, in the transmission chain link through which the third rotating body transmits torque to the fourth rotating body, the number of teeth of the transmission gear part close to the third rotating body is less than the number of teeth of the transmission gear part away from the third rotating body.

[0021] In an embodiment, the knob structure comprises a knob capable of linear movement in a first direction, the knob having an operating position and a hidden position on a movement stroke of the knob;

[0022] The knob is relatively rotationally fixed with the third rotating body to drive the third rotating body to rotate around an axis extending in the first direction.

[0023] The utility model discloses still propose a kind of shelf lifting structure, to be arranged in the refrigerator with storage compartment, its characterized in that, the shelf lifting structure includes:

[0024] Shelf, to be arranged in storage compartment;

[0025] At least one pull rope, with pull end and winding end, the pull end is connected with the shelf;

[0026] Winding roller, rotationally installed, and for winding or unwinding the winding end of the pull rope;And,

[0027] Rotary drive mechanism, the second rotating body of the rotary drive mechanism and the winding roller drive connection;

[0028] The rotary drive mechanism includes:

[0029] First rotating body and second rotating body, rotationally installed along the axis extending in the first direction, and coaxially arranged, the first rotating body is provided with avoiding hole;

[0030] Friction fit structure, including the first friction part and the second friction part that can be matched with each other, the second friction part is located on the end face of the second rotating body towards the first rotating body, the first friction part is fixedly installed, and after being passed through the avoiding hole, the second friction part can be abutted;And,

[0031] Torque transmission structure, including the transmission torque convex part and the transmission torque concave part that are matched with each other, the transmission torque concave part is concavely arranged along the first direction, on the circumference of the first rotating body, and from the middle part of the transmission torque concave part towards its edge, the concave depth of the transmission torque concave part is arranged to decrease;

[0032] When the first rotating body is fixed, correspondingly, the transmission torque convex part is at the middle position of the transmission torque concave part, the first friction part and the second friction part are abutted and frictionally matched, and the second rotating body is relatively fixed with the first friction part.

[0033] When the first rotating body rotates, the torque protruding part can move from the middle position of the torque recessed part to the edge of the torque recessed part under the driving of the first rotating body, and is clamped in the torque recessed part to top the second rotating body away from the second rotating body, so that the first friction part and the second friction part are separated to transmit the torque of the first rotating body to the second rotating body.

[0034] In an embodiment, the shelf lifting structure further comprises at least one guide wheel, which is rotatably installed;

[0035] The pulling rope is wound on the guide wheel.

[0036] The utility model further provides a refrigerator, including shelf lifting structure;

[0037] The shelf lifting structure comprises:

[0038] The shelf is arranged in the storage chamber.

[0039] At least one pulling rope has a pulling end and a winding end, and the pulling end is connected with the shelf.

[0040] The winding roller is rotatably installed and is used for winding or unwinding the winding end of the pulling rope.

[0041] The rotation driving mechanism is drivingly connected with the second rotating body and the winding roller.

[0042] The rotation driving mechanism comprises:

[0043] The first rotating body and the second rotating body are rotatably installed along the axis extending in the first direction and coaxially arranged, and the first rotating body is provided with a avoiding hole.

[0044] The friction matching structure comprises the first friction part and the second friction part capable of matching each other, the second friction part is arranged on the end face of the second rotating body facing the first rotating body, the first friction part is fixedly installed and can abut against the second friction part after penetrating the avoiding hole.

[0045] The torque transmission structure comprises the torque protruding part and the torque recessed part capable of matching each other, the torque recessed part is recessed in the first direction, is arranged in the circumferential direction of the first rotating body, and is arranged from the middle part of the torque recessed part to the edge of the torque recessed part, and the recessed depth of the torque recessed part is arranged to be reduced.

[0046] When the first rotating body is fixed, the torque protruding part is arranged at the middle position of the torque recessed part, the first friction part and the second friction part are in abutting friction matching, and the second rotating body is fixed relative to the first friction part.

[0047] When the first rotating body rotates, the torque transmission convex portion can move from the middle position of the torque transmission concave portion to the edge thereof to be clamped in the torque transmission concave portion under the driving of the first rotating body, so as to move the second rotating body away from the second rotating body, separate the first friction portion and the second friction portion, and transmit the torque of the first rotating body to the second rotating body.

[0048] In an embodiment, the refrigerator further comprises a housing, and the housing is formed with a storage chamber, and the shelf lifting structure is arranged in the storage chamber.

[0049] In an embodiment, the storage chamber has a taking and placing opening, the inner side wall of the storage chamber has a first side wall opposite to the taking and placing opening, and two second side walls are arranged on both sides of the first side wall, and a corner space is formed at the connection position of the first side wall and at least one of the second side walls.

[0050] The shelf lifting structure is arranged at least partially in the corner space.

[0051] In an embodiment, a protective plate is arranged in the storage chamber, and a mounting cavity is formed between the protective plate and the inner bottom wall of the storage chamber, and the protective plate has an exposure opening.

[0052] The rotation driving mechanism further comprises a knob structure, the knob structure comprises a third rotating body rotatably arranged in the mounting cavity, and the third rotating body is drivingly connected to the winding roller, the knob structure comprises a knob, the knob is rotationally fixed relative to the third rotating body, the knob can move linearly in a first direction, and the knob has an operation position and a hidden position on the movement stroke of the knob, and the knob is arranged in the exposure opening when the knob is in the hidden position.

[0053] The technical scheme of the utility model realizes the locking of the rotation between the first rotating body and the second rotating body through the cooperation of the first friction portion and the second friction portion after the shelf is lifted to the corresponding height, and the locking of the lifting of the shelf can be realized; when it is necessary to adjust the lifting of the shelf, the torque transmission convex portion can move from the middle position of the torque transmission concave portion to the edge thereof to be clamped in the torque transmission concave portion under the driving of the first rotating body by rotating the first rotating body, so as to move the second rotating body away from the second rotating body, separate the first friction portion and the second friction portion, transmit the torque of the first rotating body to the second rotating body, transmit the rotation of the first rotating body to the second rotating body, and the lifting of the shelf is convenient to control; and the problem that the height of the shelf is inconvenient to adjust is improved as a whole. BRIEF DESCRIPTION OF DRAWINGS

[0054] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced as follows. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained according to the structures shown in the drawings without any creative labor.

[0055] Figure 1 The structure schematic diagram of an embodiment of the rotating driving mechanism provided by the present application is shown in the figure.

[0056] Figure 2 The partial explosion schematic diagram of the rotating driving mechanism in the figure. Figure 1

[0057] Figure 3 The structure schematic diagram of the friction matching structure in the figure when locking. Figure 1

[0058] Figure 4 The structure schematic diagram of the torque transmission structure in the figure when transmitting torque. Figure 1

[0059] The structure schematic diagram of an embodiment of the shelf lifting structure provided by the present application is shown in the figure. Figure 5

[0060] The partial enlarged view of A in the figure. Figure 6 Figure 2 The partial structure schematic diagram of the third rotating body in the figure.

[0061] Figure 7 Figure 6 The partial structure schematic diagram of the third rotating body in the figure.

[0062] Explanation of figure mark:

[0063] 100, rotating driving mechanism; 1, first rotating body; 101, avoiding hole; 2, second rotating body; 21, mounting groove; 3, friction matching structure; 31, first friction part; 32, second friction part; 4, torque transmission structure; 41, torque transmission convex part; 42, torque transmission concave part; 421, accommodating concave groove; 5, first elastic member; 6, knob structure; 61, third rotating body; 611, mounting hole; 612, limiting block; 62, knob; 621, transmission rod; 622, first limiting groove; 623, convex block; 63, second elastic member; 64, jacking rod; 641, rotating limiting part; 642, clamping part; 6421, first rising section; 6422, second rising section; 7, fourth rotating body;

[0064] ​​​​200, shelf lifting structure; 8, shelf; 81, support plate; 9, pull rope; 10, winding roller; 11, guide wheel;

[0065] 300, refrigerator; 12, storage chamber; 121, taking and placing opening; 13, protection plate; 131, exposure opening; 132, sub-plate; 14, mounting cavity; 15, sliding rail.

[0066] The realization, functional features and advantages of the utility model will be further described with reference to the drawings in combination with embodiments. DETAILED DESCRIPTION

[0067] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0068] It should be noted that if the embodiments of the utility model involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0069] In addition, if the embodiments of the utility model involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In addition, "and / or" or "and / or" appearing throughout the text means that the three parallel solutions are included, taking "A and / or B" as an example, including A solution, or B solution, or A and B solution. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the ordinary skill in the art, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the utility model.

[0070] Commonly, multiple storage chambers are formed inside the refrigerator, horizontal shelves are arranged in the storage chambers, the shelves are plate-shaped, and one or more shelves are usually arranged. By the shelves, multiple storage areas are formed inside the storage chambers, and the items in the corresponding storage areas are placed on the shelves. Depending on the size of the items to be placed, the height of the shelves often needs to be adjusted to adjust the height of the corresponding storage area. When the height of the shelf is adjusted,

[0071] In the process of lifting adjustment of the shelf, the shelf is usually pulled by pulling ropes, and the lifting of the shelf is controlled by winding or unwinding the pulling ropes by winding rollers, and after the shelf is adjusted to a predetermined height, the shelf usually needs to be manually locked, and the height adjustment of the shelf is inconvenient.

[0072] The utility model provides a rotation drive mechanism.

[0073] Please refer to Figure 1 And Figure 2 In an embodiment of the utility model, the rotation drive mechanism 100 is used in the shelf 8 lifting structure 200;The rotation drive mechanism 100 includes:

[0074] The first rotating body 1 and the second rotating body 2 are coaxially arranged and are rotatably installed along the axis of extension in the first direction, and the first rotating body 1 is provided with an avoiding hole 101;

[0075] The friction fit structure 3 includes a first friction part 31 and a second friction part 32 that can cooperate with each other, the second friction part 32 is arranged on the end face of the second rotating body 2 towards the first rotating body 1, the first friction part 31 is fixedly installed and can abut against the second friction part 32 after being arranged in the avoiding hole 101;And,

[0076] The torque transmission structure 4 includes a transmission torque convex part 41 and a transmission torque concave part 42 that cooperate with each other, the transmission torque concave part 42 is concavely arranged along the first direction, on the circumference of the first rotating body, and from the middle part of the transmission torque concave part 42 towards the edge thereof, the concave depth of the transmission torque concave part 42 is arranged in a decreasing manner;

[0077] When the first rotating body 1 is fixed, correspondingly, the transmission torque convex part 41 is located at the middle position of the transmission torque concave part 42, the first friction part 31 and the second friction part 32 abut and frictionally cooperate, and the second rotating body 2 is fixed relative to the first friction part 31;

[0078] When the first rotating body 1 rotates, the transmission torque convex part 41 can be moved from the middle position of the transmission torque concave part 42 to the edge thereof under the driving of the first rotating body 1 and is clamped in the transmission torque concave part 42 to top the second rotating body 2 away from the second rotating body 2, so that the first friction part 31 and the second friction part 32 are separated, and the torque of the first rotating body 1 is transmitted to the second rotating body 2.

[0079] The utility model discloses a technical scheme through first rotator 1 and second rotator 2, after the shelf 8 is lifted to the corresponding height, through the mutual cooperation of first friction part 31 and second friction part 32, the rotation between first rotator 1 and second rotator 2 is locked, can realize the locking of the lifting of shelf 8, when needing to adjust the lifting of shelf 8, by rotating first rotator 1, the transmission convex part 41 is driven under first rotator 1, can be from the middle position of transmission concave part 42 to its edge activity to hold in transmission concave part 42, to top hold second rotator 2 and make second rotator 2 activity, so that first friction part 31 and second friction part 32 separate, to the torque of first rotator 1 is transmitted to second rotator 2, can transmit the rotation of first rotator 1 to second rotator 2, facilitate the control of the lifting of shelf 8, overallly improved the problem that the height of shelf 8 is adjusted inconveniently.

[0080] Please refer to Figure 2 and Figure 3 , the transmission convex part 41 is located in the side of first rotator 1 or second rotator 2 close to, and the transmission convex part 41 can be located in any one of first rotator 1 or second rotator 2, the transmission concave part 42 is the concave groove 421 set to the transmission convex part 41, when first rotator 1 rotates, the transmission convex part 41 can slide from the bottom wall along the transmission concave part 42, so that second rotator 2 is away from first rotator 1.

[0081] Please refer to Figure 3 and Figure 4 , in the embodiment of the application, the transmission concave part 42 includes two concave grooves 421 separately arranged on the opposite end faces of first rotator 1 and second rotator 2, and the two concave grooves 421 are oppositely arranged; the transmission convex part 41 includes a plurality of balls, and the balls are separately arranged in the two concave grooves 421.

[0082] The transmission convex part 41 and the transmission concave part 42 are one-to-one correspondingly arranged as a transmission group, a plurality of transmission groups are arranged, and the transmission groups are arranged at intervals along the circumference of the first rotator. Specifically, eight transmission groups are arranged, and the number of transmission groups can also be arranged according to requirements.

[0083] Specifically, the first rotator 1, the second rotator 2, the third rotator 61 and the fourth rotator 7 are all provided with external teeth, the third rotator 61 is engaged with the first rotator 1, and the number of teeth of the third rotator 61 is less than that of the first rotator 1; the second rotator 2 is engaged with the fourth rotator 7, and the number of teeth of the second rotator 2 is less than that of the fourth rotator 7.

[0084] The first friction part 31 comprises a first friction surface, and the second friction part 32 comprises a second friction surface; in particular, the first friction part 31 comprises a friction convex part, and the second friction part 32 comprises a friction concave part, and the friction convex part can be located in the friction concave part. The area of the first friction surface and the second friction surface is increased, and the wear of the first friction part 31 and the second friction part 32 is reduced.

[0085] The cross section of the first friction part 31 perpendicular to the length direction thereof is a cylinder, and the second rotating body 2 is concave on the side close to the first friction part 31 to form the second friction part 32, and the second friction part 32 is coaxial with the second rotating body 2.

[0086] Please refer to Figure 1 and Figure 2 The rotating driving mechanism 100 further comprises a first elastic member 5, which is arranged on the side of the second rotating body 2 away from the first rotating body 1, and is used to abut the second rotating body 2 to the first friction part 31. Through the first elastic member 5, a pressure close to the first friction part 31 can be applied to the second rotating body 2, so that the second friction part 32 cooperates with the first friction part 31.

[0087] The first elastic member 5 is preferably a spring, and the spring is coaxial with the second rotating body 2.

[0088] The rotating driving mechanism 100 further comprises:

[0089] A knob 62 structure 6, which comprises a third rotating body 61 rotatably installed;

[0090] A fourth rotating body 7, which is used to connect a winding roller 10 in the shelf 8 lifting structure 200; and

[0091] A gear transmission structure, which comprises a plurality of gear sets, and each gear set comprises mutually meshing transmission gear parts;

[0092] Two transmission gear parts in two adjacent gear sets are respectively arranged on the first rotating body 1 and the second rotating body 2.

[0093] Rotating the third rotating body 61 can drive the fourth rotating body 7 to rotate the winding roller 10 through the gear transmission structure.

[0094] In the transmission link of the third rotating body 61 transmitting torque to the fourth rotating body 7, in at least one of the gear sets, the number of teeth of the transmission gear portion close to the third rotating body 61 is less than the number of teeth of the transmission gear portion away from the third rotating body 61. When the shelf 8 is controlled to rise, the force required to rotate the third rotating body 61 can be reduced, achieving the effect of labor saving.

[0095] Specifically, the first rotating body 1, the second rotating body 2, the third rotating body 61 and the fourth rotating body 7 are all provided with external teeth, the third rotating body 61 is engaged with the first rotating body 1, and the number of teeth of the third rotating body 61 is less than that of the first rotating body 1; the second rotating body 2 is engaged with the fourth rotating body 7, and the number of teeth of the second rotating body 2 is less than that of the fourth rotating body 7.

[0096] The knob 62 structure 6 includes a knob 62, which can move linearly in a first direction, and has an operating position and a hidden position on the movement stroke of the knob;

[0097] The knob 62 is rotationally stopped relative to the third rotating body 61 to drive the third rotating body 61 to be rotationally installed along the axis extending in the first direction.

[0098] After the shelf 8 reaches a predetermined height, the knob 62 can be moved to the hidden position by controlling the linear movement of the knob 62 in the first direction, so as to facilitate reducing accidental touching of the knob 62; when it is necessary to control the lifting of the shelf 8, the knob 62 can be moved to the operating position by controlling the linear movement of the knob 62 in the first direction, so as to facilitate rotating the knob 62.

[0099] Please refer to Figure 1 and Figure 5 The utility model also proposes a shelf 8 lifting structure 200, and the refrigeration device comprises a rotating driving mechanism 100, and the specific structure of the rotating driving mechanism 100 refers to the above embodiment, since the shelf 8 lifting structure 200 adopts all the technical schemes of the above all embodiments, at least has all the beneficial effects brought by the technical schemes of the above embodiments, which will not be repeated here.

[0100] The shelf 8 lifting structure 200 comprises:

[0101] A shelf 8 is arranged in a storage room 12;

[0102] At least one pulling rope 9 has a pulling end and a winding end, and the pulling end is connected with the shelf 8;

[0103] A winding roller 10 is rotationally installed and is used for winding or unwinding the winding end of the pulling rope 9; and

[0104] The rotation driving mechanism 100 is drivingly connected with the second rotation body 2 and the winding roller 10.

[0105] The rotation driving mechanism 100 is arranged in the shelf 8 lifting structure 200, comprising:

[0106] The first rotation body 1 and the second rotation body 2 are coaxially arranged and rotationally mounted along the axis extending in the first direction, and the first rotation body 1 is provided with a avoiding hole 101;

[0107] The friction matching structure 3 comprises a first friction part 31 and a second friction part 32 capable of matching with each other, the second friction part 32 is arranged on the end face of the second rotation body 2 facing the first rotation body 1, the first friction part 31 is fixedly mounted and capable of abutting against the second friction part 32 after penetrating the avoiding hole 101; and

[0108] The torque transmission structure 4 comprises a torque transmission convex part 41 and a torque transmission concave part 42 capable of matching with each other, the torque transmission concave part 42 is concavely arranged along the first direction, in the circumferential direction of the first rotation body, and the concave depth of the torque transmission concave part 42 decreases from the middle part to the edge of the torque transmission concave part 42;

[0109] When the first rotation body 1 is fixed, the torque transmission convex part 41 is located at the middle part of the torque transmission concave part 42, the first friction part 31 and the second friction part 32 are in abutting friction matching, and the second rotation body 2 is fixed relative to the first friction part 31;

[0110] When the first rotation body 1 rotates, the torque transmission convex part 41 is driven by the first rotation body 1 to move from the middle part of the torque transmission concave part 42 to the edge of the torque transmission concave part 42 and be clamped in the torque transmission concave part 42, so as to top the second rotation body 2 away from the second rotation body 2, so that the first friction part 31 and the second friction part 32 are separated, and the torque of the first rotation body 1 is transmitted to the second rotation body 2.

[0111] By controlling the rotation driving mechanism 100, the rotation and locking of the winding roller 10 can be realized, so as to realize the control of the winding of the pulling rope 9 by the winding roller 10 and the control of the lifting of the shelf 8.

[0112] The shelf 8 lifting structure 200 further comprises at least one guide wheel 11 rotationally mounted, and the pulling rope 9 is wound on the guide wheel 11. By the guide wheel 11, the pulling direction of the pulling rope can be changed.

[0113] Please refer to Figure 1 andFigure 5 This utility model also proposes a refrigerator 300, including the aforementioned shelf 8 lifting structure 200.

[0114] The rotation drive mechanism 100, used in the shelf 8 lifting structure 200, is characterized in that the rotation drive mechanism 100 includes:

[0115] The first rotating body 1 and the second rotating body 2 are both rotatably installed along an axis extending in the first direction and are coaxially arranged. The first rotating body 1 is provided with a clearance hole 101.

[0116] The friction fit structure 3 includes a first friction part 31 and a second friction part 32 that can cooperate with each other. The second friction part 32 is disposed on the end face of the second rotating body 2 facing the first rotating body 1. The first friction part 31 is fixedly installed and, after passing through the clearance hole 101, can abut against the second friction part 32; and,

[0117] The torque transmission structure 4 includes a torque transmission protrusion 41 and a torque transmission recess 42 that cooperate with each other. The torque transmission recess 42 is recessed along a first direction in the circumferential direction of the first rotating body, and the recess depth of the torque transmission recess 42 is reduced from the middle to the edge of the first rotating body.

[0118] When the first rotating body 1 is fixed, the corresponding torque transmission protrusion 41 is located at the middle position of the torque transmission recess 42, the first friction part 31 and the second friction part 32 are in abutting frictional engagement, and the second rotating body 2 is fixed relative to the first friction part 31.

[0119] When the first rotating body 1 rotates, the torque transmission protrusion 41, driven by the first rotating body 1, can move from the middle position of the torque transmission recess 42 to its edge until it is engaged in the torque transmission recess 42, so as to support the second rotating body 2 to move away from the second rotating body 2, thereby separating the first friction part 31 and the second friction part 32, so as to transmit the torque of the first rotating body 1 to the second rotating body 2.

[0120] The refrigerator 300 also includes a housing, which forms a storage compartment 12, and the shelf 8 lifting structure 200 is disposed within the storage compartment 12. This reduces the exposure of the shelf 8 lifting structure 200.

[0121] The storage chamber 12 has a taking and placing opening 121, the inner side wall of the storage chamber 12 has a first side wall opposite to the taking and placing opening 121, and two second side walls are arranged on both sides of the first side wall, and a corner space is formed at the connecting position of the first side wall and at least one second side wall; the shelf 8 lifting structure 200 is arranged at least partially in the corner space. When taking and placing the articles placed on the shelf 8, it can be convenient to take and place.

[0122] Please refer to Figure 5 and Figure 6 A protective plate 13 is arranged in the storage chamber 12, an installation cavity 14 is formed between the protective plate 13 and the inner bottom wall of the storage chamber 12, and the protective plate 13 has an exposure opening 131.

[0123] The rotating drive mechanism 100 further comprises a knob 62 structure 6, the knob 62 structure 6 comprises a third rotating body 61 rotatably installed in the installation cavity 14, the third rotating body 61 is drivingly connected to the winding roller 10, the knob 62 structure 6 comprises a knob 62, the knob 62 is rotationally fixed relative to the third rotating body 61, the knob 62 can move linearly in a first direction, and the knob has an operation position and a hidden position on the movement stroke, and when the knob is in the hidden position, the knob is hidden in the exposure opening 131.

[0124] Through the installation cavity 14, the third rotating body 61 can be protected.

[0125] Specifically, the rotating drive mechanism 100 is arranged in the installation cavity 14, which reduces the exposure of the rotating drive structure.

[0126] The protective plate 13 has a sub-plate 132, the sub-plate 132 is detachably arranged, the exposure opening 131 is arranged on the sub-plate 132, and the sub-plate 132 is arranged corresponding to the rotating drive structure, and by removing the sub-plate 132, the rotating drive structure can be conveniently maintained.

[0127] The upper end of the first elastic member 5 abuts against the sub-plate 132, the sub-plate 132 cooperates with the first elastic member 5, and can exert a pressure on the second rotating body 2 close to the first friction part 31. The side of the second rotating body 2 away from the first rotating body 1 forms an installation groove 21, and the first elastic member 5 is arranged in the installation groove 21, which reduces the disengagement of the first elastic member 5.

[0128] In this embodiment, two guide wheels 11 are provided for each single traction rope. One guide wheel 11 is located on the upper side of the shelf 8, and the other guide wheel 11 is located inside the mounting cavity 14. A perforation is formed on the protective plate 13, and the traction rope passes through the perforation.

[0129] Please see Figure 6 and Figure 7 The third rotating body 61 has a mounting hole 611 oppositely arranged on the side near the exposed opening 131, and a limiting block 612 is formed on the inner peripheral wall of the mounting hole 611; the knob 62 has a transmission rod 621, which is coaxially inserted into the mounting hole 611, and a first limiting groove 622 is provided on the periphery of the transmission rod 621, and the limiting block 612 is located in the first limiting groove 622; through the mutual cooperation of the limiting block 612 and the limiting groove, the relative rotation between the third rotating body 61 and the knob 62 can be stopped.

[0130] The knob 62 structure 6 also includes:

[0131] The second elastic element 63 is disposed within the mounting hole 611;

[0132] A push rod 64 is movably disposed within the mounting hole 611, and the push rod 64 is located between the second elastic member 63 and the transmission rod 621;

[0133] The circumference of the top rod 64 has a rotation limiting part 641 and a snap-fit ​​part 642 arranged sequentially along the first circumferential direction. The rotation limiting part 641 includes a second limiting groove, and the limiting block 612 can pass through the second limiting groove.

[0134] The snap-fit ​​portion 642 has a first rising section 6421 and a second rising section 6422 that protrude sequentially along the first circumferential direction at one end near the transmission rod 621. The maximum protrusion height of the first rising section 6421 is greater than the minimum protrusion height of the second rising section 6422.

[0135] The transmission rod 621 has a protrusion 623 at one end near the top rod 64, and the protrusion 623 can abut against the locking part 642.

[0136] When the convex block 623 is located in the second limiting groove, the convex block 623 can abut against the clamping part 642 when the knob 62 is pressed, so that the top rod 64 slides, and when the height of the top rod 64 is lower than the bottom side of the limiting block 612, the convex block 623 abuts against the clamping part 642, so that the top rod 64 rotates and the limiting block 612 is located on the upside of the first rising section 6421, and the knob 62 is released, so that the convex block 623 can abut against the first rising section 6421; the convex block 623 cooperates with the first rising section 6421, so that the top rod 64 rotates, thereby making the convex block 623 slide into the second limiting groove, the top rod 64 moves upward under the driving of the second elastic member 63, and the knob 62 is ejected out of the exposure opening 131.

[0137] When the convex block 623 is located in the second rising section 6422, the convex block 623 can abut against the clamping part 642 when the knob 62 is pressed, so that the top rod 64 slides, and when the height of the top rod 64 is lower than the bottom side of the limiting block 612, the convex block 623 abuts against the clamping part 642, so that the top rod 64 rotates and the limiting block 612 is located on the upside of the first rising section 6421, and the knob 62 is released, so that the convex block 623 can abut against the first rising section 6421; the convex block 623 cooperates with the first rising section 6421, so that the top rod 64 rotates, thereby making the convex block 623 slide into the second limiting groove, the top rod 64 moves upward under the driving of the second elastic member 63, and the knob 62 is ejected out of the exposure opening 131.

[0138] Specifically, the second elastic member 63 is a spring, one end of the second elastic member 63 abuts against the bottom wall of the mounting hole 611, and the other end abuts against the top rod 64.

[0139] Please refer to Figure 5 The storage compartment 12 is provided with a sliding rail 15, the shelf 8 is slidingly installed on the sliding rail 15, and a horizontal limiting assembly is slidingly installed on the sliding rail 15, and the horizontal limiting assembly is used to keep the shelf 8 horizontal. Through the sliding rail 15, the stability of the lifting of the shelf 8 is improved.

[0140] Specifically, the sliding rail 15 is provided with two, and the two sliding rails 15 are located on opposite sides of the shelf 8.

[0141] The sliding rail 15 is formed with a sliding groove along the extension direction thereof, the horizontal limiting assembly comprises at least two sliding blocks, the at least two sliding blocks are sequentially and slidingly arranged in the sliding groove along the extension direction of the sliding rail 15, and the at least two sliding blocks are fixedly connected with the shelf 8. Two sliding blocks cooperate, so that the horizontal degree of the shelf 8 remains unchanged.

[0142] The bottom side of the shelf 8 is provided with a support plate 81 fixedly connected with the sliding block, and the sliding block comprises a pulley.

[0143] The above merely illustrates the exemplary embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation or direct / indirect application in other related technical fields under the technical concept of the present application and by using the content of the present application specification and drawings are included in the patent protection scope of the present application.

Claims

1. A rotary drive mechanism for use in a shelf lifting structure, characterized in that, The rotating driving mechanism comprises: a first rotating body and a second rotating body, both of which are coaxially arranged and rotatably installed along an axis extending in a first direction, and the first rotating body is provided with an avoiding hole; a friction matching structure comprising a first friction part and a second friction part capable of matching with each other, the second friction part is arranged on an end face of the second rotating body facing the first rotating body, and the first friction part is fixedly installed and capable of abutting against the second friction part after penetrating through the avoiding hole; and a torque transmission structure comprising a transmission convex part and a transmission concave part capable of matching with each other, the transmission concave part is concavely arranged along the first direction, and the concave arrangement depth of the transmission concave part decreases from the middle part to the edge of the transmission concave part in the circumferential direction of the first rotating body; when the first rotating body is fixed, the transmission convex part is located at the middle part of the transmission concave part, the first friction part and the second friction part are in abutting friction matching, and the second rotating body is fixed relative to the first friction part; when the first rotating body rotates, the transmission convex part can be moved from the middle part to the edge of the transmission concave part under the driving of the first rotating body, and is clamped in the transmission concave part to top the second rotating body away from the second rotating body, so that the first friction part and the second friction part are separated, and the torque of the first rotating body is transmitted to the second rotating body.

2. The rotational drive mechanism of claim 1, wherein, The transmission concave part comprises two accommodating grooves arranged on the opposite end faces of the first rotating body and the second rotating body, and the two accommodating grooves are oppositely arranged; The transmission convex part comprises a ball, and the ball is arranged in the two accommodating grooves.

3. The rotational drive mechanism of claim 1, wherein, The transmission convex part and the transmission concave part are arranged as a transmission group one by one, and a plurality of transmission groups are arranged and spaced apart in the circumferential direction of the first rotating body.

4. The rotational drive mechanism of claim 1, wherein, The first friction part comprises a friction convex part, the second friction part comprises a friction concave part, and the friction convex part can be arranged in the friction concave part.

5. The rotational drive mechanism of claim 1, wherein, The rotating driving mechanism further comprises a first elastic member arranged on the side of the second rotating body away from the first rotating body, and used for abutting the second rotating body to the first friction part.

6. The rotational drive mechanism of claim 1, wherein, The rotating driving mechanism further comprises: a knob structure comprising a third rotating body rotatably installed; a fourth rotating body used for connecting a winding roller in the shelf lifting structure; and a gear transmission structure comprising a plurality of gear sets, each of which comprises transmission gear parts meshing with each other; two transmission gear parts in two adjacent gear sets are arranged on the first rotating body and the second rotating body, respectively.

7. The rotational drive mechanism of claim 6, wherein, In the transmission chain link of the third rotating body transmitting torque to the fourth rotating body, the number of teeth of the transmission gear part close to the third rotating body is less than the number of teeth of the transmission gear part away from the third rotating body in at least one gear set.

8. The rotational drive mechanism of claim 6, wherein, The knob structure comprises a knob capable of moving linearly in a first direction, and the knob has an operation position and a hidden position in the movement stroke. The knob is rotationally fixed relative to the third rotating body to drive the third rotating body to rotate along the axis extending in the first direction.

9. A shelf lifting structure to be provided in a refrigerator having a storage compartment, characterized by, The shelf lifting structure comprises: a shelf arranged in the storage compartment; at least one pulling rope having a pulling end and a winding end, the pulling end being connected to the shelf; a winding roller rotationally mounted and configured to wind or unwind the winding end of the pulling rope; and a rotation driving mechanism comprising the rotation driving mechanism according to any one of claims 1 to 8, the second rotating body of the rotation driving mechanism being drivingly connected to the winding roller.

10. The shelving lift structure of claim 9, wherein, The shelf lifting structure further comprises at least one guide wheel rotationally mounted. The pulling rope is wound around the guide wheel.

11. A refrigerator characterized by comprising: The shelf lifting structure according to any one of claims 9 to 10.

12. The refrigerator according to claim 11, wherein, The refrigerator further comprises a housing formed with a storage compartment, and the shelf lifting structure is arranged in the storage compartment.

13. The refrigerator according to claim 12, wherein The storage compartment has a taking and placing opening, an inner side wall of the storage compartment has a first side wall opposite to the taking and placing opening, and two second side walls are arranged on both sides of the first side wall, and a corner space is formed at a connecting position of the first side wall and at least one of the second side walls. The shelf lifting structure is at least partially arranged in the corner space.

14. The refrigerator of claim 12, wherein, A protection plate is arranged in the storage compartment, a mounting cavity is formed between the protection plate and an inner bottom wall of the storage compartment, and the protection plate has an exposure opening. The rotation driving mechanism further comprises a knob structure, the knob structure comprises a third rotating body rotationally mounted in the mounting cavity, the third rotating body is drivingly connected to the winding roller, the knob structure comprises a knob, the knob is rotationally fixed relative to the third rotating body, the knob is linearly movable in a first direction, the knob has an operation position and a hidden position in a movement stroke of the knob, and the knob is arranged in the exposure opening when the knob is in the hidden position.

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