Lifting mechanism and range hood provided with same

Abstract

A lifting mechanism and a range hood provided with the lifting mechanism are characterized in that a lead screw of the lifting mechanism is horizontally arranged and installed on an output shaft of a driving motor, a shear type movement mechanism comprises a first swing arm and a second swing arm which are rotationally connected with each other, and an upper sliding block at the upper end of the first swing arm is in threaded connection with the lead screw; the upper sliding block is arranged on the upper supporting table in a rolling mode through an upper roller assembly. The lower sliding block at the lower end of the second swing arm is arranged on the lower supporting table in a rolling mode through a lower roller assembly. The lifting mechanism has the advantages that the upper sliding block of the lifting mechanism is arranged on the upper supporting table in a rolling mode through the upper rolling wheel assembly, the lower sliding block is arranged on the lower supporting table in a rolling mode through the lower rolling wheel assembly, friction resistance can be reduced after rolling friction is adopted, and therefore movement precision and reliability can be guaranteed; discontinuous shaking and friction abnormal noise generated in the operation process are reduced, and the extractor hood adopting the lifting mechanism can ensure that the whole machine does not incline or shake in the lifting process.

Description

TECHNICAL FIELD

[0001] The utility model relates to a range hood, especially to a lifting mechanism and a range hood provided with the same. BACKGROUND

[0002] Chinese cooking produces a large amount of oil fume. In order to keep the kitchen clean and the human body healthy, a range hood has become one of the essential devices in a modern kitchen. The height of the negative pressure area of the range hood directly affects the oil fume suction effect. If the distance between the air inlet of the range hood and the oil fume generating area is large, the oil fume suction path is long, and the suction time is increased, which makes it easy to produce oil fume escape phenomenon during cooking. If the installation height of the range hood is lowered, although it is beneficial to improve the oil fume suction effect, it will cause the cooking space to be too small, and the head of the cook is easy to accidentally touch the smoke collecting cover. Moreover, after the installation height is lowered, the line of sight and the overall appearance of the kitchen are also affected. Therefore, people have invented a lifting type range hood, such as the Chinese utility model patent disclosed in Patent No. 201320075819.5 (Authorized Announcement No. CN203215771U) "Lifting Range Hood". The lifting range hood is provided with a flat and thin smoke suction cover at the bottom of the range hood body. The smoke suction cover has a main smoke suction port on the front surface. A lifting mechanism is arranged in the body to drive the smoke suction cover to move up and down. During use, the smoke suction cover is lowered to play a role in sucking oil fume. When not in use, the smoke suction cover is raised to hide in the range hood body. The lifting mechanism is installed in the lifting type range hood. The conventional lifting mechanism adopts a motor driven vertical screw rod to lift. Some use a motor to drive a steel wire to vertically lift. Some use a chain transmission to achieve the lifting. The existing lifting mechanism is usually arranged in the fan frame, which occupies the oil fume passage. On the one hand, it affects the performance of the fan and the oil fume suction effect. On the other hand, the force position of the mechanism is far away from the center of gravity of the range hood, and the whole machine is easy to tilt during lifting. SUMMARY

[0003] The first technical problem to be solved by the utility model is to provide a lifting mechanism with stable lifting movement and small resistance during movement in view of the above existing technical conditions.

[0004] The second technical problem to be solved by the utility model is to provide a range hood with stable lifting process and less tilting of the whole machine in view of the above existing technical conditions.

[0005] The utility model discloses solve above-mentioned first technical problem adopts technical scheme for: a lifting mechanism, its characterized in that including having:

[0006] Driving motor;

[0007] Screw rod, horizontally set up and install on the output shaft of driving motor;

[0008] Scissor type movement mechanism, including with each other rotation connection's first swing arm and second swing arm, the upper end of first swing arm is installed with upper slide block, the upper slide block is connected in screw rod on the thread, the lower end of second swing arm is installed with lower slide block;

[0009] Upper support platform, the upper slide block is set up on the upper support platform through upper roller assembly rolling, the upper end of second swing arm is rotatably connected on upper support platform;

[0010] Lower support platform, the lower slide block is set up on the lower support platform through lower roller assembly rolling, the lower end of first swing arm is rotatably connected on lower support platform.

[0011] Preferably, the upper support platform is a fixed platform, the lower support platform is a lifting platform, the upper slide block is limited on the upper support platform and makes horizontal motion relative to the upper support platform, and the lower slide block is limited on the lower support platform and makes horizontal motion relative to the lower support platform. By thus setting, the lower support platform makes lifting motion relative to the upper support platform under the drive of the lifting mechanism.

[0012] In order to make the upper slide block be set up on the upper support platform rolling, the upper support platform includes upper guide plate and upper cover plate arranged above the upper guide plate, the upper slide block has upper roller shaft, and the upper roller assembly includes first roller installed at both ends of the upper roller shaft, and the first roller is set up rolling between the upper guide plate and the upper cover plate.

[0013] In order to further reduce the movement friction of the upper slide block, the upper surface of the upper guide plate is formed with an upper cavity, and the upper roller assembly further includes second roller installed at the bottom of the upper slide block, the second roller is arranged in the upper cavity and rolling contact with the side wall of the upper cavity.

[0014] In order to make the lower slide block be set up on the lower support platform rolling, the lower support platform includes lower guide plate and lower cover plate arranged below the lower guide plate, the lower slide block has lower roller shaft, and the lower roller assembly includes third roller installed at both ends of the lower roller shaft, and the third roller is set up rolling between the lower guide plate and the lower cover plate.

[0015] In order to further reduce the movement friction of the lower slide block, the lower surface of the lower guide plate is formed with a lower cavity, and the lower roller assembly further includes fourth roller installed at the top of the lower slide block, the fourth roller is arranged in the lower cavity and rolling contact with the side wall of the lower cavity.

[0016] The utility model discloses the technical scheme that the second technical problem of the above-mentioned is solved, and a kind of range hood, including upper box and lower box, it is characterized by: the lifting mechanism of described upper box and lower box between installation, the upper support platform of lifting mechanism is fixed in the bottom of described upper box, the lower support platform of lifting mechanism is fixed in the top of described lower box, the lower box is driven under the lifting mechanism and relative upper box is lifted and moves.

[0017] Further preferably, the upper box and the lower box have a cooking fume passage in communication with each other, the lower box has a cooking cavity inside separated from the cooking fume passage, and the lifting mechanism is arranged outside the cooking fume passage and the cooking cavity. In this way, the cooking fume will not contaminate the lifting mechanism, and the movement reliability of the lifting mechanism can be ensured.

[0018] In order to enable the lifting mechanism to smoothly drive the lower box to move up and down, the lifting mechanism is located below the upper box and in the middle area above the lower box.

[0019] In order to reduce the friction of the lower box moving up and down and make the movement of the lower box more smooth, the upper box comprises a fan frame, vertical guide rails are installed on the outer wall of the fan frame, and the lower box moves up and down relative to the upper box along the vertical guide rails under the drive of the lifting mechanism.

[0020] Compared with the prior design, the utility model has the advantages that the screw rod of the lifting mechanism is horizontally arranged and installed on the output shaft of the driving motor, the upper sliding block at the upper end of the first swing arm of the shearing type movement mechanism is threadedly connected to the screw rod, the upper sliding block is arranged on the upper support platform by the upper roller assembly, the lower sliding block at the lower end of the second swing arm is arranged on the lower support platform by the lower roller assembly, after rolling friction, the friction resistance can be reduced, so that the movement accuracy and reliability can be ensured, the intermittent shaking and friction noise generated during operation can be reduced, and the range hood with the lifting mechanism can ensure that the whole machine does not tilt and shake during lifting. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 FIG. 1 is a structural schematic view of the lifting mechanism of the utility model embodiment;

[0022] Figure 2 FIG. 2 is a structural schematic view of the lifting mechanism shown in FIG. 1 (with the upper cover plate removed); Figure 1

[0023] Figure 3 FIG. 3 is a structural schematic view of the lifting mechanism shown in FIG. 1 (with the lower cover plate removed); Figure 1

[0024] Figure 4 ​​The utility model discloses a structure schematic diagram of range hood (lower box body drops state) for embodiment of the utility model.

[0025] Figure 5 For Figure 4 The structure schematic diagram of range hood (lower box body rises state) shown in the figure. DETAILED DESCRIPTION

[0026] The utility model will be further described in detail below in combination with the drawings embodiment.

[0027] As Figures 1 to 3 The lifting mechanism of the embodiment includes driving motor 1, screw rod 2, scissor type movement mechanism 3, upper support platform 4, lower support platform 5, upper roller assembly, lower roller assembly etc. Among them, screw rod 2 is horizontally arranged and is installed on the output shaft of driving motor 1, and scissor type movement mechanism 3 includes first swing arm 31 and second swing arm 32 that are rotatably connected with each other. The upper end of first swing arm 31 is installed with upper sliding block 33, and upper sliding block 33 is screw-connected on screw rod 2, and further, upper sliding block 33 is rotatably arranged on upper support platform 4 through upper roller assembly, and the lower end of first swing arm 31 is rotatably connected on lower support platform 5. The lower end of second swing arm 32 is installed with lower sliding block 34, and further, lower sliding block 34 is rotatably arranged on lower support platform 5 through lower roller assembly, and the upper end of second swing arm 32 is rotatably connected on upper support platform 4.

[0028] The upper support platform 4 of the embodiment is fixed platform, and the lower support platform 5 is lifting platform, and upper sliding block 33 is limited on upper support platform 4 and makes horizontal rolling relative to upper support platform 4, and lower sliding block 34 is limited on lower support platform 5 and makes horizontal rolling relative to lower support platform 5. Under the driving of driving motor 1, through the transmission of scissor type movement mechanism 3, lower support platform 5 is equivalent to upper support platform 4 and makes lifting movement.

[0029] The upper support table 4 of the embodiment comprises an upper guide plate 41 and an upper cover plate 42 arranged above the upper guide plate 41, and the upper sliding block 33 has an upper roller shaft 35. An upper concave cavity 411 is formed on the upper surface of the upper guide plate 41. The upper roller assembly comprises a first roller 61 and a second roller 62. The first roller 61 is installed at the front and rear ends of the upper roller shaft 35, and the first roller 61 is arranged between the upper guide plate 41 and the upper cover plate 42 in a rolling manner. The second roller 62 is installed at the bottom of the upper sliding block 33. The second roller 62 has two rows, each row having two second rollers 62. The second roller 62 is arranged in the upper concave cavity 411 and in rolling contact with the side wall of the upper concave cavity 411. The lower support table 5 comprises a lower guide plate 51 and a lower cover plate 52 arranged below the lower guide plate 51. The lower sliding block 34 has a lower roller shaft 36. A lower concave cavity 511 is formed on the lower surface of the lower guide plate 51. The lower roller assembly comprises a third roller 63 and a fourth roller 64. The third roller 63 is installed at the two ends of the lower roller shaft 36, and the third roller 63 is arranged between the lower guide plate 51 and the lower cover plate 52 in a rolling manner. The fourth roller 64 is installed at the top of the lower sliding block 34. The fourth roller 64 has two rows, each row having two fourth rollers 64. The fourth roller 64 is arranged in the lower concave cavity 511 and in rolling contact with the side wall of the lower concave cavity 511. By installing the upper roller assembly on the upper sliding block 33 and installing the lower roller assembly on the lower sliding block 34, the sliding friction between the sliding block and the corresponding guide plate can be effectively converted into rolling friction due to the fact that the upper roller assembly and the lower roller assembly each comprise a plurality of rollers, and the rolling directions of the first roller 61 and the second roller 62 are different, and the rolling directions of the third roller 63 and the fourth roller 64 are different. This reduces the frictional resistance and ensures the accuracy and reliability of the movement. In addition, the second roller 62 and the fourth roller 64 each have two rows, which can provide accurate guidance and prevent the sliding block from tilting during movement, thereby avoiding the phenomenon of mechanism shaking or even being stuck.

[0030] As shown in Figure 4 and Figure 5 , the range hood of the embodiment is a lifting type range hood, which comprises an upper cabinet and a lower cabinet. A lifting mechanism is installed between the upper cabinet and the lower cabinet and is located below the upper cabinet and above the lower cabinet in the middle area. The upper support table 4 of the lifting mechanism is fixed to the bottom of the upper cabinet, and the lower support table 5 of the lifting mechanism is fixed to the top of the lower cabinet. The lower cabinet moves up and down relative to the upper cabinet under the drive of the lifting mechanism.

[0031] The upper cabinet and the lower cabinet have an oil fume passage that is in communication with each other. The lifting mechanism is located outside the oil fume passage, which can avoid oil fume pollution of the lifting mechanism when the range hood is working, effectively ensuring the reliability of the lifting mechanism. The lower cabinet has a cooking cavity 7 that is isolated from the oil fume passage. The cooking cavity can realize functions such as steaming and baking, microwaving, and refrigerating. The lifting mechanism is arranged outside the cooking cavity 7, specifically at the top of the cooking cavity 7.

[0032] The upper box body comprises a fan frame 8, vertical guide rails 9 are installed on the outer wall of the fan frame 8, and the lower box body moves up and down relative to the upper box body along the vertical guide rails 9 under the driving of the lifting mechanism, and movement is more stable.

Claims

1. A lifting mechanism, characterized in that The utility model relates to a lifting mechanism for a lifting table, comprising: a driving motor (1); a screw rod (2) horizontally arranged and mounted on the output shaft of the driving motor (1); a scissor mechanism (3) comprising a first swing arm (31) and a second swing arm (32) rotatably connected to each other, the upper end of the first swing arm (31) being mounted with an upper sliding block (33) threadedly connected to the screw rod (2), the lower end of the second swing arm (32) being mounted with a lower sliding block (34); an upper support table (4), the upper sliding block (33) being rollingly arranged on the upper support table (4) through an upper roller assembly, the upper end of the second swing arm (32) being rotatably connected to the upper support table (4); a lower support table (5), the lower sliding block (34) being rollingly arranged on the lower support table (5) through a lower roller assembly, the lower end of the first swing arm (31) being rotatably connected to the lower support table (5).

2. The lifting mechanism of claim 1, wherein: The upper support table (4) is a fixed table, the lower support table (5) is a lifting table, the upper sliding block (33) is limited on the upper support table (4) and moves horizontally relative to the upper support table (4), and the lower sliding block (34) is limited on the lower support table (5) and moves horizontally relative to the lower support table (5).

3. The lifting mechanism of claim 1, wherein: The upper support table (4) comprises an upper guide plate (41) and an upper cover plate (42) arranged above the upper guide plate (41), the upper sliding block (33) has an upper roller shaft (35), and the upper roller assembly comprises first rollers (61) mounted at both ends of the upper roller shaft (35), the first rollers (61) being rollingly arranged between the upper guide plate (41) and the upper cover plate (42).

4. The lifting mechanism of claim 3, wherein: An upper concave cavity (411) is formed on the upper surface of the upper guide plate (41), the upper roller assembly further comprises a second roller (62) mounted at the bottom of the upper sliding block (33), the second roller (62) is arranged in the upper concave cavity (411) and rollingly contacts the side wall of the upper concave cavity (411).

5. The lift mechanism of claim 1, wherein: The lower support table (5) comprises a lower guide plate (51) and a lower cover plate (52) arranged below the lower guide plate (51), the lower sliding block (34) has a lower roller shaft (36), and the lower roller assembly comprises third rollers (63) mounted at both ends of the lower roller shaft (36), the third rollers (63) being rollingly arranged between the lower guide plate (51) and the lower cover plate (52).

6. The lifting mechanism of claim 5, wherein: A lower concave cavity (511) is formed on the lower surface of the lower guide plate (51), the lower roller assembly further comprises a fourth roller (64) mounted at the top of the lower sliding block (34), the fourth roller (64) is arranged in the lower concave cavity (511) and rollingly contacts the side wall of the lower concave cavity (511).

7. A range hood comprising an upper cabinet and a lower cabinet, characterized by: A lifting mechanism according to any one of claims 1 to 6 is arranged between the upper box body and the lower box body, the upper support table (4) of the lifting mechanism is fixed to the bottom of the upper box body, the lower support table (5) of the lifting mechanism is fixed to the top of the lower box body, and the lower box body moves up and down relative to the upper box body under the driving of the lifting mechanism.

8. The hood according to claim 7, characterized in that: The upper cabinet and the lower cabinet have an oil fume passage in communication with each other, the lower cabinet has a cooking cavity (7) isolated from the oil fume passage, and the lifting mechanism is arranged outside the oil fume passage and the cooking cavity (7).

9. The hood according to claim 8, characterized in that: The lifting mechanism is located below the upper cabinet and in a region centrally located above the lower cabinet.

10. The hood according to claim 7, characterized in that: The upper cabinet comprises a fan frame (8), a vertical guide rail (9) is mounted on the outer wall of the fan frame (8), and the lower cabinet moves up and down relative to the upper cabinet along the vertical guide rail (9) under the driving of the lifting mechanism.

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