CN112664629A - Low-noise lifting adjusting device - Google Patents
Low-noise lifting adjusting device Download PDFInfo
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- CN112664629A CN112664629A CN201910978187.5A CN201910978187A CN112664629A CN 112664629 A CN112664629 A CN 112664629A CN 201910978187 A CN201910978187 A CN 201910978187A CN 112664629 A CN112664629 A CN 112664629A
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- tooth
- rack
- contact surface
- gear
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Abstract
The invention discloses a low-noise lifting adjusting device, comprising: a first tooth crown part is formed between every two adjacent first tooth bodies of the rack in a connected mode, the first tooth crown part is arranged in the range between any two adjacent first nodes, and a first arc-shaped contact surface is arranged on the surface of the first tooth crown part; a second tooth root is formed between every two adjacent second tooth bodies of the gear in a connected mode, the second tooth root is arranged in the range between any two adjacent second nodes, a second contact surface in an arc shape is arranged on the surface of the second tooth root, and when the gear is meshed with the rack, the second contact surface is in complete close contact with the first contact surface in the arc shape. The smooth and round contact is realized during meshing transmission, no gap is formed, and the noise can be reduced, so that the effect of reducing noise is achieved.
Description
Technical Field
The present invention relates to a rack and pinion structure, and more particularly to a low noise lift adjustment device capable of smooth contact during engagement transmission to reduce noise generation.
Background
In the present general lifting unit of a table, for example, patent No. I662919 of "table lifting structure" in taiwan of china in 21/6/2019 discloses: the lifting adjusting structure is respectively sleeved with air pressure rods in the inner pipes of the two table legs, the outer sides of the inner pipes are provided with guide slideways corresponding to the guide rails of the hollow outer pipes, the two sides of each guide slideway are equidistantly arranged to form corresponding arc parts which are contacted with the guide rails, the guide tooth grooves of the hollow outer pipes are pivoted with guide gears, the inner pipes are provided with meshed guide racks corresponding to the guide gears, and the pulley grooves of the hollow outer pipes are pivoted with pulleys which are contacted with the inner pipes; therefore, the inner tubes of the table legs can synchronously and smoothly move up and down in the hollow outer tube without deflection, so that the height of the table plate combined on the inner tubes of the table legs can be conveniently adjusted, the purpose of being suitable for different users to use is achieved, and the practical efficacy characteristic is increased in the aspect of integral implementation and use.
The patent of the prior art mainly utilizes the meshing structure of a rack (guide rack) and a gear (guide gear), so that the inner pipe can synchronously move in the hollow outer pipe, and the effect of controlling the lifting of the table top is achieved. However, in the process of the meshing transmission between the rack and the gear of the prior art, a gap (back gap) is generated after the teeth between the rack and the gear are meshed with each other, and the existence of the gap causes noise, so that the trouble in using the table during lifting is generated.
In order to overcome the disadvantage of noise generated during the meshing transmission between the rack and the gear, there is a new patent No. 529682 entitled "resistive gear backlash eliminating structure" in taiwan of china, 4/21/2003, which discloses: the gear is sleeved with a simulating gear, the number of teeth of the simulating gear is one more than or one less than that of the gear, and the outer side of the simulating gear is supported by an elastic body which can stretch along the axial direction of the simulating gear, so that the simulating gear always keeps certain elasticity and is pressed against the outer side of the gear, when the gear is meshed with the rack, the convex teeth of the gear and the convex teeth of the simulating gear can be adjusted into a front-back staggered form to be embedded into the concave teeth of the rack, gaps cannot be generated in the concave teeth of the rack, and therefore the back gap space of the meshing between the gear and the rack is eliminated, and the purposes of thoroughly solving the problems of inaccurate transmission, vibration loosening and the like and eliminating transmission noise are achieved.
The friction gear of the prior art is not ideal in use because it is worn due to uneven force during meshing transmission after a period of use, and a gap is also formed.
Disclosure of Invention
The present invention provides a low noise lift adjustment device, and more particularly to a rack and pinion structure that can be smoothly and smoothly contacted during the engagement transmission process to reduce the noise.
Based on the above, the present invention mainly adopts the following technical means to achieve the above object.
A low noise lift adjustment device, comprising: the rack is linearly provided with a plurality of first tooth bodies, a first tooth crown part is formed by connecting every two adjacent first tooth bodies, a first node is arranged on each first tooth body, the first tooth crown part is arranged in the range between any two adjacent first nodes, a first contact surface in the shape of a circular arc is arranged on the surface of each first tooth crown part, and a first tooth root part is formed by connecting every two adjacent first tooth crown parts; the gear is meshed with the rack, a plurality of second tooth bodies are arranged on the circumference of the gear in a surrounding manner, second nodes are arranged on the second tooth bodies, a second tooth root is formed between every two adjacent second tooth bodies in a connected manner, second nodes are arranged on the second tooth bodies, the second tooth root is arranged in the range between any two adjacent second nodes, a second contact surface in an arc shape is arranged on the surface of the second tooth root, a second tooth crown portion is formed between any two adjacent second tooth root portions in a connected manner, the gear is meshed with the rack, and the second contact surface is in arc-shaped complete close contact with the first contact surface.
Further, the surface of the first tooth root part is provided with a first non-contact surface, the surface of the second tooth crown part is provided with a second non-contact surface, the gear is meshed with the rack, and the second non-contact surface is not in contact with the first non-contact surface completely.
Furthermore, the rack extends vertically to form a fixing part with an L-shaped section.
Furthermore, the rack extends vertically to form a fixing part with an I-shaped section.
Further, each of the first crown parts is a roller which rolls relatively, a circumferential surface of the roller becomes the first contact surface, and the circumferential surface is in complete close contact with the second contact surface.
Furthermore, the rack is provided with a U-shaped seat body, and the roller is arranged on the seat body in a spanning manner.
Furthermore, the rack is provided with a planar fixed part.
Further, the first tooth crown part and the second tooth root part are arranged in corresponding circular arc shapes.
Further, the first tooth root part and the second tooth crown part are arranged in corresponding circular arc shapes.
The above technical features have the following advantages:
1. the first contact surface of the first tooth crown part of the rack is in complete close contact with the second contact surface of the second tooth root part of the gear without any gap, so that the transmission is smooth and smooth in the transmission process, and the noise can be reduced.
2. When the gear is meshed with the rack, the second non-contact surface and the first non-contact surface are not contacted with each other completely, so that no noise is generated.
3. The second contact surface is in arc-shaped complete close contact with the first contact surface, so uneven stress cannot be caused, and the first tooth body and the second tooth body cannot be worn or damaged, so that the service life can be prolonged, and the lifting device is suitable for any table lifting unit.
4. The side edge of the rack is vertically extended with fixing parts with different cross-sectional shapes, so that the rack can be abutted against guide blocks with different structures for transmission.
Drawings
Fig. 1 is an exploded perspective view of a first embodiment of the present invention.
Fig. 2 is a front view of a rack and pinion according to a first embodiment of the present invention.
Fig. 3 is a schematic view of the engagement of the rack and the gear according to the first embodiment of the present invention.
Fig. 4 is a schematic view illustrating the first embodiment of the present invention used for lifting and lowering a table.
Fig. 5 is a schematic view of the rack and pinion meshing transmission of the first embodiment of the present invention.
Fig. 6 is a perspective view of a rack gear according to a second embodiment of the present invention.
Fig. 7 is a schematic view illustrating a table being lifted and lowered according to a second embodiment of the present invention.
Fig. 8 is a perspective view of a rack gear according to a third embodiment of the present invention.
Fig. 9 is a schematic view of a rack and pinion engagement drive of a third embodiment of the present invention.
Fig. 10 is a schematic view illustrating a table being lifted and lowered according to a third embodiment of the present invention.
Fig. 11 is a schematic view of a rack and pinion engagement drive of a fourth embodiment of the present invention.
[ notation ] to show
1 first tooth of rack 11
12 first crown part 13 first contact surface
14 first root portion 15 first non-contact surface
16 fixed part 17 bending part
2 Gear 21 second tooth
22 second root 23 second contact surface
24 second crown portion 25 second non-contact surface
3 rack 36 fixing part
4 rack 42 first crown
43 first contact surface 46 fixing part
5 rack 52 first crown
54 first root 6 gear
62 second root 64 second crown
Guide block of A outer tube A1
B inner tube B1 transmission shaft
P1 first node P2 second node.
Detailed Description
Referring to fig. 1 and 2, a first embodiment of the present invention includes: rack 1 and gear 2, wherein:
the rack 1 is provided with a plurality of first tooth bodies 11 in a straight line, a first tooth crown part 12 is formed between every two adjacent first tooth bodies 11 in a connected mode, and the first tooth crown part 12 is arranged in the range between any two adjacent first nodes P1. The surface of the first crown part 12 is provided with a first contact surface 13 in the shape of a circular arc. A first tooth root 14 is formed between any two adjacent first tooth crown parts 12, and the surface of the first tooth root 14 is provided with a first non-contact surface 15. In addition, a fixing portion 16 with an L-shaped cross section is vertically extended from the side of the rack 1.
And a gear 2 engaged with the rack 1 to thereby drive the rack 1 to move linearly. The gear 2 is circumferentially provided with a plurality of second tooth bodies 21, a second tooth root 22 is formed between every two adjacent second tooth bodies 21, and the second tooth root 22 is arranged in the range between any two adjacent second nodes P2. The surface of the second root portion 22 is provided with a second contact surface 23 in the shape of an arc, and when the gear 2 is engaged with the rack 1, the second contact surface 23 and the first contact surface 13 are in complete contact with each other in the shape of an arc (see fig. 3). And a second tooth crown part 24 is formed between any two adjacent second tooth root parts 22, the surface of the second tooth crown part 24 is provided with a second non-contact surface 25, and when the gear 2 is meshed with the rack 1, the second non-contact surface 25 and the first non-contact surface 15 are not contacted with each other completely.
When the rack is installed and used for lifting a table, as shown in fig. 4 and 5, the fixing portions 16 of the two racks 1 are respectively fixed on the opposite inner wall surfaces of an outer tube a. The two gears 2 are fixed at two ends of a transmission shaft B1 penetrating through the outer wall surface on an inner tube B, and the transmission shaft B1 is driven by a power source to make the transmission shaft B1 synchronously drive the two gears 2 to rotate. The two gears 2 are respectively in corresponding meshing transmission with the two racks 1. Two guiding blocks A1 are fixed on the outer wall surface of the inner tube B, and a bent part 17 of the two fixing parts 16 in L shape can respectively abut against the two guiding blocks A1, so that the outer tube A can stably move up and down relative to the inner tube B by the guiding action of the two guiding blocks A1.
When the transmission shaft B1 starts to rotate, the two gears 2 can be driven to rotate synchronously, so as to drive the corresponding racks 1 to ascend or descend synchronously. Since the first contact surface 13 of the first crown portion 12 of the rack 1 is in complete close contact with the second contact surface 23 of the second root portion 22 of the gear 2 without any gap, the meshing transmission between the first tooth body 11 and the second tooth body 21 can be performed smoothly and smoothly during the transmission process, and since no gap is formed, the generation of noise during the transmission contact can be reduced. When the gear 2 is engaged with the rack 1, the second non-contact surface 25 and the first non-contact surface 15 are not contacted with each other at all, so that no noise of transmission contact is generated. Moreover, the second contact surface 23 and the first contact surface 13 are in complete close contact in a circular arc shape, so that the defect of uneven stress is not generated, the abrasion or damage of the first tooth body 11 and the second tooth body 21 is not caused, the service life is prolonged, and the table lifting device is suitable for being used in any table lifting unit.
The second embodiment of the present invention, as shown in fig. 6, is different from the first embodiment only in that a fixing portion 36 with an I-shaped cross section is vertically extended from a side of the rack 3, and can be abutted against guiding blocks with different structures, so as to achieve the same effect as the first embodiment.
When the rack is installed and used for lifting a table, as shown in fig. 7, the fixing parts 36 of the two racks 3 are respectively fixed on the opposite inner wall surfaces of an outer tube a. Two guiding blocks A1 are fixed on the outer wall of the inner tube B, and the two fixing parts 36 can respectively abut against the two guiding blocks A1, so that the outer tube A can stably move up and down relative to the inner tube B by the guiding action of the two guiding blocks A1.
The third embodiment of the present invention, as shown in fig. 8 and 9, differs from the first embodiment only in that the rack 4 is provided with a U-shaped seat body, and each first tooth crown portion 42 is formed by a roller straddling the seat body, and the circumferential surface of the roller is a first contact surface 43 for rotation. The rollers on the rack 4 can roll relatively, so that the circumferential surface of the roller can be in complete close contact with the second contact surface 23 of the second tooth root 22 of the gear 2 without any gap, and therefore, in the process of meshing transmission, the roller can be in smooth and smooth transmission contact, the generation of noise during transmission contact can be reduced, and the same effect as the first embodiment can be achieved.
When the table is installed and used for lifting, as shown in fig. 10, two racks 4 are respectively fixed on the opposite inner wall surfaces of an outer tube a. Two guiding blocks a1 are fixed on the outer wall surface of the inner tube B, and a fixing portion 46 of the two racks 4 in a plane shape can respectively abut against the two guiding blocks a1, so that the outer tube a can stably move up and down relative to the inner tube B by the guiding action of the two guiding blocks a 1.
Fourth embodiment of the present invention, as shown in fig. 11, the fourth embodiment of the present invention is different from the first embodiment described above in that the first tooth crown portion 52 of the rack 5 and the second tooth root portion 62 of the gear 6 are provided in the shape of corresponding circular arcs. The first root portion 54 of the rack 5 and the second crown portion 64 of the gear 6 are formed in a corresponding circular arc shape. Therefore, in the process of meshing transmission, smooth and round transmission contact can be achieved, and the generation of noise during transmission contact can be reduced, so that the same effect as that of the first embodiment can be achieved.
While the operation, use and efficacy of the present invention will be fully understood from the foregoing description of the preferred embodiments, it is to be understood that the present invention is not limited to the disclosed embodiments, but is capable of numerous modifications and variations, including variations, modifications, variations, equivalents, variations, changes, substitutions, modifications, variations, changes, variations, alterations, substitutions and equivalents, which fall within the spirit and scope of the invention.
Claims (9)
1. A low noise lift adjustment device, comprising:
the rack is linearly provided with a plurality of first tooth bodies, a first tooth crown part is formed by connecting every two adjacent first tooth bodies, a first node is arranged on each first tooth body, the first tooth crown part is arranged in the range between any two adjacent first nodes, the surface of each first tooth crown part is provided with a first contact surface in a circular arc shape, and a first tooth root part is formed by connecting every two adjacent first tooth crown parts;
the gear is meshed with the rack, a plurality of second tooth bodies are arranged on the circumference of the gear in a ring mode, a second tooth root is formed between every two adjacent second tooth bodies in a connected mode, second nodes are arranged on the second tooth bodies, the second tooth root is arranged in the range between any two adjacent second nodes, a second contact surface in an arc shape is arranged on the surface of the second tooth root, a second tooth crown portion is formed between any two adjacent second tooth root portions in a connected mode, the gear is meshed with the rack, and the second contact surface is in arc-shaped close contact with the first contact surface.
2. The low noise rise and fall adjustment device of claim 1, wherein: the surface of the first tooth root part is provided with a first non-contact surface, the surface of the second tooth crown part is provided with a second non-contact surface, the gear is meshed with the rack, and the second non-contact surface is not in contact with the first non-contact surface.
3. The low noise rise and fall adjustment device of claim 1, wherein: the rack vertically extends to form a fixing part with an L-shaped section.
4. The low noise rise and fall adjustment device of claim 1, wherein: the rack vertically extends to form a fixing part with an I-shaped section.
5. The low noise rise and fall adjustment device of claim 1, wherein: each first tooth crown part is a roller which rolls relatively, a circumferential surface of the roller becomes the first contact surface, and the circumferential surface is in close contact with the second contact surface.
6. The low noise rise and fall adjustment device of claim 5, wherein: the rack is provided with a U-shaped seat body, and the roller is arranged on the seat body in a spanning mode.
7. The low noise rise and fall adjustment device of claim 6, wherein: the rack is provided with a planar fixed part.
8. The low noise rise and fall adjustment device of claim 1, wherein: the first tooth crown part and the second tooth root part are arranged in corresponding circular arc shapes.
9. The low noise rise and fall adjustment device of claim 1, wherein: the first tooth root part and the second tooth crown part are arranged in corresponding circular arc shapes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910978187.5A CN112664629A (en) | 2019-10-15 | 2019-10-15 | Low-noise lifting adjusting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910978187.5A CN112664629A (en) | 2019-10-15 | 2019-10-15 | Low-noise lifting adjusting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112664629A true CN112664629A (en) | 2021-04-16 |
Family
ID=75400170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910978187.5A Withdrawn CN112664629A (en) | 2019-10-15 | 2019-10-15 | Low-noise lifting adjusting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112664629A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114305964A (en) * | 2021-12-27 | 2022-04-12 | 尹钢 | Extensible massage chair with elastic constant-distance rack rail and convenient for walking of manipulator |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4602521A (en) * | 1981-12-17 | 1986-07-29 | Arthur Ernest Bishop | Rack and pinion steering gear |
| US5596904A (en) * | 1994-05-17 | 1997-01-28 | Toyota Jidosha Kabushiki Kaisha | Steering gear apparatus of rack-and-pinion type |
| JPH10196768A (en) * | 1996-12-31 | 1998-07-31 | Samsung Electron Co Ltd | Double gear |
| JP2006147083A (en) * | 2004-11-22 | 2006-06-08 | Funai Electric Co Ltd | Driving apparatus for running optical pickup of disk drive |
| US20070186706A1 (en) * | 2006-02-02 | 2007-08-16 | Georgetown Rail Equipment Company | Load bearing sprocket system |
| JP2007308076A (en) * | 2006-05-22 | 2007-11-29 | Hitachi Ltd | Power steering device |
| US20080223163A1 (en) * | 2004-01-13 | 2008-09-18 | Takayasu Yamazaki | Rack-and-Pinion Steering Apparatus |
| CN203868265U (en) * | 2014-06-12 | 2014-10-08 | 成都工投电子设备有限公司 | Gear-rack transmission device with zero back clearance |
| US20160375801A1 (en) * | 2014-04-07 | 2016-12-29 | Delta Kogyo Co., Ltd. | Seat lifter and gear mechanism |
| WO2019074271A1 (en) * | 2017-10-12 | 2019-04-18 | (주)세고스 | Sliding device |
-
2019
- 2019-10-15 CN CN201910978187.5A patent/CN112664629A/en not_active Withdrawn
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4602521A (en) * | 1981-12-17 | 1986-07-29 | Arthur Ernest Bishop | Rack and pinion steering gear |
| US5596904A (en) * | 1994-05-17 | 1997-01-28 | Toyota Jidosha Kabushiki Kaisha | Steering gear apparatus of rack-and-pinion type |
| JPH10196768A (en) * | 1996-12-31 | 1998-07-31 | Samsung Electron Co Ltd | Double gear |
| US20080223163A1 (en) * | 2004-01-13 | 2008-09-18 | Takayasu Yamazaki | Rack-and-Pinion Steering Apparatus |
| JP2006147083A (en) * | 2004-11-22 | 2006-06-08 | Funai Electric Co Ltd | Driving apparatus for running optical pickup of disk drive |
| US20070186706A1 (en) * | 2006-02-02 | 2007-08-16 | Georgetown Rail Equipment Company | Load bearing sprocket system |
| JP2007308076A (en) * | 2006-05-22 | 2007-11-29 | Hitachi Ltd | Power steering device |
| US20160375801A1 (en) * | 2014-04-07 | 2016-12-29 | Delta Kogyo Co., Ltd. | Seat lifter and gear mechanism |
| CN203868265U (en) * | 2014-06-12 | 2014-10-08 | 成都工投电子设备有限公司 | Gear-rack transmission device with zero back clearance |
| WO2019074271A1 (en) * | 2017-10-12 | 2019-04-18 | (주)세고스 | Sliding device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114305964A (en) * | 2021-12-27 | 2022-04-12 | 尹钢 | Extensible massage chair with elastic constant-distance rack rail and convenient for walking of manipulator |
| CN114305964B (en) * | 2021-12-27 | 2023-08-22 | 浙江豪中豪健康产品有限公司 | Elastic constant-distance rack rail flattened massage chair convenient for walking of manipulator |
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| Date | Code | Title | Description |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20210416 |