Gear assembly and range hood applying gear assembly

Abstract

The utility model discloses a gear assembly and a range hood applying the gear assembly, the gear assembly comprises a first tooth piece and a second tooth piece, the first tooth piece and the second tooth piece are symmetrically spliced along the axial direction, the first tooth piece comprises a first main body and first gear teeth arranged at the periphery of the first main body, and the second tooth piece comprises a second main body and second gear teeth arranged at the periphery of the second main body; the gear assembly further comprises a clearance compensation structure, the clearance compensation structure comprises third gear teeth arranged between the first gear teeth and the second gear teeth, the third gear teeth are made of elastic materials, and the second gear teeth are made of elastic materials. The first gear teeth, the second gear teeth and the third gear teeth are the same in number and correspond in position, the tooth thickness of the third gear teeth in the circumferential direction of the gear assembly is larger than that of the first gear teeth and the second gear teeth in the corresponding positions, and therefore the two sides of the third gear teeth in the circumferential direction of the gear assembly protrude out of the first gear teeth and the second gear teeth in the corresponding positions.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical drive mechanism especially a gear assembly and the range hood of application has this gear assembly. BACKGROUND

[0002] The range hood has become one of indispensable kitchen household electrical equipment in modern family.

[0003] Such as the Chinese utility model patent of application No. 202322368650.9 discloses a range hood, which comprises a casing, a first air inlet is arranged on the casing, a smoke baffle is connected to the casing in a manner of rotating and / or translating relative to the casing and can open and close the first air inlet, an air inlet cavity is connected to the casing in a manner of being sleeved on and off the casing and moving up and down relative to the casing, a second air inlet is arranged on the air inlet cavity, and a driving mechanism is connected to the smoke baffle at a power output end, so as to drive the smoke baffle to open and close the first air inlet.

[0004] At present, most range hoods adopt a speed reducer motor as a driving scheme of a movement mechanism, but the gear gap problem will cause the smoke baffle to stop or impact and make a click sound in a reversing state, so that the user experience is not very ideal. UTILITY MODEL CONTENTS

[0005] The first technical problem to be solved by the utility model is to provide a gear assembly capable of solving the smoke baffle running stop and impact problem caused by the gear gap from the driving end and improving the user experience in view of the deficiencies in the prior art.

[0006] The second technical problem to be solved by the utility model is to provide a range hood applying the gear assembly.

[0007] The technical scheme adopted by the utility model to solve the first technical problem is as follows: a gear assembly, characterized by comprising a first tooth piece and a second tooth piece, the first tooth piece and the second tooth piece are symmetrically spliced in the axial direction, the first tooth piece comprises a first main body and a first gear tooth arranged on the peripheral part of the first main body, the second tooth piece comprises a second main body and a second gear tooth arranged on the peripheral part of the second main body, the tooth profile shapes of the first gear tooth and the second gear tooth are the same and one-to-one corresponding, the gear assembly further comprises a gap compensation structure, the gap compensation structure comprises a third gear tooth arranged between the first gear tooth and the second gear tooth, the third gear tooth is made of an elastic material, the number of the first gear, the second gear and the third gear tooth is the same and the positions are corresponding, the tooth thickness of the third gear tooth in the peripheral direction of the gear assembly is greater than that of the first gear tooth and the second gear tooth at the corresponding position, so that the third gear tooth protrudes from the first gear tooth and the second gear tooth at the corresponding position on both sides in the peripheral direction of the gear assembly.

[0008] By setting the gap compensation structure, when the gear assembly meshes with other mating gears, the third gear teeth of the gap compensation structure can be in pre-tight contact with the tooth surface of the mating gear to form a no-backlash fit, solving the impact vibration and pause problem caused by gear backlash during gear operation, and when it is applied to the movement mechanism of the smoke baffle of the range hood, the technical effect of stable reversing of the smoke baffle can be achieved; and since the third gear teeth have elastic properties, the torque transmission is still dependent on the combined first tooth sheet and second tooth sheet, so that the effect of not being stuck can be achieved, and the running impact caused by the gap can be solved.

[0009] In order to constitute the third gear teeth, the gap compensation structure is bent from spring steel, and the gap compensation structure comprises a first arc segment, a second arc segment and a connecting segment for connecting the first arc segment and the second arc segment, and the first arc segment and the second arc segment are symmetrically arranged to constitute the third gear teeth.

[0010] In order to have a better elastic range, one end of the first arc segment away from the connecting segment and one end of the second arc segment away from the connecting segment constitute the addendum of the third gear teeth, and the one end of the first arc segment away from the connecting segment and the one end of the second arc segment away from the connecting segment are arranged in a spaced manner.

[0011] In order to set the connecting segment of the gap compensation structure, the first main body is formed with a first extension part extending towards one side of the second main body, the second main body is formed with a second extension part diverging towards the direction of the first main body, the gap compensation structure is arranged along the circumferential direction of the first extension part and the second extension part, and the connecting segment of the gap compensation structure is arranged between the first extension part and the second extension part.

[0012] In order to set the connecting segment of the gap compensation structure, the first extension part is provided with a first clamping groove matched with the shape of the connecting segment, the second extension part is provided with a second clamping groove matched with the shape of the connecting segment, and the connecting segment is limited between the first clamping groove and the second clamping groove.

[0013] The technical scheme adopted by the utility model to solve the second technical problem is: a range hood applied with the gear assembly.

[0014] In order to be able to drive the smoke baffle to overturn, the range hood comprises a smoke baffle and a movement mechanism for driving the smoke baffle to overturn.

[0015] In order to drive the smoke baffle to overturn, the movement mechanism comprises a first connecting rod mechanism, a second connecting rod mechanism, a synchronous shaft, a gear box and a motor, the smoke baffle is driven to overturn by the first connecting rod mechanism and the second connecting rod mechanism, the first connecting rod mechanism and the second connecting rod mechanism are connected by the synchronous shaft and can synchronously act, the gear box is driven by the motor, the gear assembly is arranged in the gear box, the synchronous shaft is connected with the gear assembly and is driven to rotate by the gear assembly, and the transmission gear meshing with the gear assembly and capable of driving the gear assembly to rotate is further arranged in the gear box.

[0016] Further, the transmission gear comprises fourth teeth, each third tooth is located between two adjacent fourth teeth of the transmission gear, and the two tooth surfaces of the third tooth and the two adjacent fourth teeth close to each other are in pre-tight contact. Thus, the non-backlash matching is formed, and the impact and stop problems caused by the gear backlash during the gear operation are solved.

[0017] Compared with the prior art, the utility model has the advantages that: through setting gap compensation structure, when the gear assembly is meshed with other matching gears, the third tooth of the gap compensation structure can be in pre-tight contact with the tooth surface of the matching gear to form non-backlash matching, the impact vibration and stop problems caused by the gear backlash during the gear operation are solved, when it is applied to the movement mechanism of the smoke baffle of the extractor hood, the technical effect of stable reversing of the smoke baffle can be realized; and since the third tooth has the elastic property, the torque transmission is still relied on the combined first tooth piece and second tooth piece, the effect of not being stuck can be achieved, and the operation impact caused by the gap can be solved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a schematic view of the gear assembly of the utility model embodiment;

[0019] Figure 2 It is an exploded schematic view of the gear assembly of the utility model embodiment;

[0020] Figure 3 It is an exploded schematic view of the gear assembly of the utility model embodiment from another perspective;

[0021] Figure 4 It is a schematic view of the gap compensation structure of the gear assembly of the utility model embodiment;

[0022] Figure 5 It is a schematic view of the extractor hood of the utility model embodiment;

[0023] Figure 6 It is an internal schematic view of the gear box of the extractor hood of the utility model embodiment;

[0024] Figure 7The utility model discloses a gear assembly and transmission gear meshing schematic view of the range hood of the embodiment of the utility model. DETAILED DESCRIPTION

[0025] The utility model will be described further in detail below in connection with the drawings.

[0026] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and are not indicative or suggestive of the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, since the disclosed embodiments of the utility model can be arranged in different directions, so these orientation indicating terms are only as illustrations and should not be regarded as limitations, for example, "upper", "lower" are not necessarily limited to the direction opposite or consistent with the direction of gravity. In addition, the features defined as "first", "second" can explicitly or implicitly include one or more features.

[0027] Reference Figures 6-7 A range hood comprising a smoke baffle 4 and a movement mechanism driving the smoke baffle 4 to flip.

[0028] The movement mechanism comprises a first connecting rod mechanism 51, a second connecting rod mechanism 52, a synchronous shaft 53, a gear box 54 and a motor 55. The smoke baffle 4 is driven to flip by the first connecting rod mechanism 51 and the second connecting rod mechanism 52, the first connecting rod mechanism 51 and the second connecting rod mechanism 52 are connected through the synchronous shaft 53 and can act synchronously, and the gear box 54 is a speed reduction mechanism driven by the motor 55.

[0029] The gear box 54 is provided with a gear assembly and a transmission gear 541 meshing with the gear assembly and capable of driving the gear assembly to rotate. The transmission gear 541 comprises a fourth gear tooth 5411. The synchronous shaft 53 is connected with the gear assembly and driven to rotate by the gear assembly.

[0030] The gear assembly comprises a first tooth sheet 1 and a second tooth sheet 2, and the first tooth sheet 1 and the second tooth sheet 2 are symmetrically spliced in the axial direction.

[0031] The first tooth sheet 1 comprises a first main body 11 and a first gear tooth 12 arranged at the peripheral portion of the first main body 11. The second tooth sheet 2 comprises a second main body 21 and a second gear tooth 22 arranged at the peripheral portion of the second main body 21, and the tooth profile shapes of the first gear tooth 12 and the second gear tooth 22 are the same and one-to-one corresponding.

[0032] The gear assembly further comprises a gap compensation structure 3. The gap compensation structure 3 comprises a third gear tooth 31 arranged between the first gear tooth 12 and the second gear tooth 22. The first gear tooth 12, the second gear tooth 22 and the third gear tooth 31 all have a plurality of gear teeth arranged along the circumference, and the number of gear teeth of the three is the same and the positions correspond. The third gear tooth 31 is made of elastic material, and the tooth thickness of the third gear tooth 31 is greater than that of the other two gear teeth, so that the tooth surface of the third gear tooth 31 is in pre-tight contact with the tooth surface of the fourth gear tooth 5411. The tooth thickness refers to the size along the circumference of the gear assembly. The greater the tooth thickness, the more the third gear tooth 31 protrudes on both sides of the circumference of the corresponding first gear tooth 12 and second gear tooth 22.

[0033] The gap compensation structure 3 is made of spring steel and comprises a first arc segment 311, a second arc segment 312 and a connecting segment 32 for connecting the first arc segment 311 and the second arc segment 312. The first arc segment 311 and the second arc segment 312 are symmetrically arranged to form the third gear tooth 31.

[0034] The end of the first arc segment 311 away from the connecting segment 32 and the end of the second arc segment 312 away from the connecting segment 32 form the addendum of the third gear tooth 31. The end of the first arc segment 311 away from the connecting segment 32 and the end of the second arc segment 312 away from the connecting segment 32 are arranged in a spaced manner.

[0035] The first body 11 is formed with a first extension 111 extending towards one side of the second body 21, and the second body 21 is formed with a second extension 211 diverging towards the first body 11. The third gear tooth 31 is arranged along the circumference of the first extension 111 and the second extension 211. The first extension 111 is provided with a first clamping groove 1111 matched with the shape of the connecting segment 32, and the second extension 211 is provided with a second clamping groove 2111 matched with the shape of the connecting segment 32. The connecting segment 32 is embedded between the first clamping groove 1111 and the second clamping groove 2111.

[0036] By dividing the entire gear assembly into the first tooth sheet 1 and the second tooth sheet 2, and embedding the third gear tooth 31 with a standard tooth profile made of spring steel bending in the first tooth sheet 1 and the second tooth sheet 2, each third gear tooth 31 is located between two fourth gear teeth 5411 of the driving gear 541. The two tooth surfaces of the third gear tooth 31 and the two fourth gear teeth 5411 of the driving gear 541 are in pre-tight contact (contact with pre-tight force) to form a gear gap-free fit, which solves the impact and stop problem caused by the gear backlash during gear operation and achieves the technical effect of stable reversing of the smoke baffle. Because the third gear tooth 31 has a springback property, the real torque transmission still relies on the combined first tooth sheet 1 and second tooth sheet 2, which can achieve the effect of not being stuck and solve the running impact caused by the gap.

[0037] At the driving end, the clearance angle problem of the gearbox output shaft is solved, realizing gear transmission without backlash, and the problems of jamming and impact vibration of the smoke deflector of the range hood in the vertical state are solved.

Claims

1. A gear assembly characterized by: The gear assembly comprises a first tooth sheet (1) and a second tooth sheet (2), the first tooth sheet (1) and the second tooth sheet (2) are symmetrically spliced in the axial direction, the first tooth sheet (1) comprises a first main body (11) and a first gear tooth (12) arranged on the periphery of the first main body (11), the second tooth sheet (2) comprises a second main body (21) and a second gear tooth (22) arranged on the periphery of the second main body (21), the tooth profile of the first gear tooth (12) and the second gear tooth (22) is the same and one-to-one corresponding; the gear assembly further comprises a gap compensation structure (3), the gap compensation structure (3) comprises a third gear tooth (31) arranged between the first gear tooth (12) and the second gear tooth (22), the third gear tooth (31) is made of elastic material, the number of the first gear tooth (12), the second gear tooth (22) and the third gear tooth (31) is the same and the positions are corresponding, the tooth thickness of the third gear tooth (31) in the circumferential direction of the gear assembly is greater than that of the first gear tooth (12) and the second gear tooth (22) in the corresponding position, so that the third gear tooth (31) protrudes on both sides in the circumferential direction of the gear assembly.

2. The gear assembly of claim 1, wherein: The gap compensation structure (3) is bent from spring steel, the gap compensation structure (3) comprises a first arc segment (311), a second arc segment (312) and a connecting segment (32) for connecting the first arc segment (311) and the second arc segment (312), the first arc segment (311) and the second arc segment (312) are symmetrically arranged to form the third gear tooth (31).

3. The gear assembly of claim 2, wherein: The end of the first arc segment (311) away from the connecting segment (32) and the end of the second arc segment (312) away from the connecting segment (32) form the addendum of the third gear tooth (31), and the end of the first arc segment (311) away from the connecting segment (32) and the end of the second arc segment (312) away from the connecting segment (32) are arranged in a spaced manner.

4. The gear assembly of claim 3, wherein: The first main body (11) is formed with a first extension (111) extending towards one side of the second main body (21), the second main body (21) is formed with a second extension (211) derived towards the first main body (11), the gap compensation structure (3) is arranged in the circumferential direction of the first extension (111) and the second extension (211), and the connecting segment (32) of the gap compensation structure (3) is arranged between the first extension (111) and the second extension (211).

5. The gear assembly of claim 4, wherein: The first extension (111) is provided with a first clamping groove (1111) matched with the shape of the connecting segment (32), the second extension (211) is provided with a second clamping groove (2111) matched with the shape of the connecting segment (32), and the connecting segment (32) is limited between the first clamping groove (1111) and the second clamping groove (2111).

6. A range hood characterized by: The gear assembly has the rights claimed in any one of claims 1-5.

7. The hood according to claim 6, characterized in that: The range hood comprises a smoke baffle (4) and a movement mechanism for turning the smoke baffle (4).

8. The hood according to claim 7, characterized in that: The movement mechanism comprises a first linkage mechanism (51), a second linkage mechanism (52), a synchronous shaft (53), a gear box (54) and a motor (55), the smoke baffle (4) is driven to overturn by the first linkage mechanism (51) and the second linkage mechanism (52), the first linkage mechanism (51) and the second linkage mechanism (52) are connected by the synchronous shaft (53) and can synchronously act, the gear box (54) is driven by the motor (55), a gear assembly is arranged in the gear box (54), the synchronous shaft (53) is connected with the gear assembly and is driven to rotate by the gear assembly, the gear box (54) is further provided with a transmission gear (541) engaged with the gear assembly and capable of driving the gear assembly to rotate.

9. The hood according to claim 8, characterized in that: The transmission gear (541) comprises fourth gear teeth (5411), each third gear tooth (31) is located between two adjacent fourth gear teeth (5411) of the transmission gear (541), and the two tooth surfaces of the third gear tooth (31) and the two adjacent fourth gear teeth (5411) that are close to each other are in pre-tightening contact.

Images