CN119393499A - A reliable ratchet mechanism with noiseless operation - Google Patents
A reliable ratchet mechanism with noiseless operation Download PDFInfo
- Publication number
- CN119393499A CN119393499A CN202411888139.4A CN202411888139A CN119393499A CN 119393499 A CN119393499 A CN 119393499A CN 202411888139 A CN202411888139 A CN 202411888139A CN 119393499 A CN119393499 A CN 119393499A
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- CN
- China
- Prior art keywords
- pawl
- ratchet
- arm
- brake wheel
- brake
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000009434 installation Methods 0.000 abstract description 2
- 230000033001 locomotion Effects 0.000 description 5
- 208000029278 non-syndromic brachydactyly of fingers Diseases 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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- Braking Arrangements (AREA)
- Sheets, Magazines, And Separation Thereof (AREA)
Abstract
一种可靠的无噪声运转棘轮机构，棘爪与臂连接，棘轮通过键固定在轴上与臂连接，棘爪位于棘轮上方，连杆与棘爪连接，臂与棘爪、棘轮的接触面设置有档销，臂的另一面设置有制动轮，制动轮套装在轴上并绕轴转动，一个以弹簧施压的制动器套装在制动轮上，档销位于棘爪凹槽位置，棘爪长杆端顶端设有橡胶条，棘爪长杆端相对于档销的一侧设有橡胶垫。本机械机构能有效的消除噪声，它具有体积小，结构简单，零件数目少的优点，成本低廉，安装使用方便。
A reliable ratchet mechanism with noiseless operation, the pawl is connected to the arm, the ratchet is fixed on the shaft and connected to the arm through a key, the pawl is located above the ratchet, the connecting rod is connected to the pawl, the contact surface of the arm, the pawl and the ratchet is provided with a stop pin, the other side of the arm is provided with a brake wheel, the brake wheel is mounted on the shaft and rotates around the shaft, a brake pressed by a spring is mounted on the brake wheel, the stop pin is located in the groove position of the pawl, the top end of the long rod of the pawl is provided with a rubber strip, and the side of the long rod of the pawl relative to the stop pin is provided with a rubber pad. This mechanical mechanism can effectively eliminate noise, it has the advantages of small size, simple structure, small number of parts, low cost, and easy installation and use.
Description
Technical Field
The invention relates to the technical field of mechanical design, in particular to a reliable noiseless operation ratchet mechanism.
Background
In mechanical transmissions, ratcheting is a relatively typical manner of movement. The drive mechanism may drive the ratchet to move, and the pawl slides over the back of the ratchet teeth when the drive mechanism rotates the ratchet through an angle in one direction. When the drive mechanism rotates in the opposite direction, the pawl is trapped between the gears of the ratchet wheel, preventing the ratchet wheel from rotating in its opposite direction, so the ratchet wheel is stationary. Thus, when the driving mechanism moves, the ratchet wheel moves unidirectionally and intermittently. However, the ratchet motion has a great problem, and when the pawl slides on the back of the ratchet, the pawl pushes into the ratchet teeth or skips over the ratchet teeth when in idle stroke, so that the click noise is generated, and how to eliminate the click noise in the ratchet motion is a problem to be solved.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a reliable noiseless operation ratchet mechanism, which eliminates the noise of clicking caused by skipping the ratchet teeth when the pawl is jacked into the ratchet teeth or in idle stroke in ratchet motion, and simultaneously reduces the abrasion of the pawl and the ratchet gear.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the utility model provides a reliable noiseless operation ratchet, including pawl (4) and ratchet (7), a serial communication port, pawl (4) are connected with arm (1), ratchet (7) are fixed on axle (5) through the key and are connected with arm (1), pawl (4) are located ratchet (7) top, connecting rod (3) are connected with pawl (4), the contact surface of arm (1) and pawl (4), ratchet (7) is provided with shelves round pin (6), the another side of arm (1) is provided with brake wheel (8), brake wheel (8) suit is on axle (5) and rotate around axle (5), a stopper (2) suit with spring pressure is on brake (8), shelves round pin (6) are located pawl (4) recess position, pawl (4) long rod end top is equipped with rubber strip (4-2), one side of pawl (4) long rod end for shelves round pin (6) is equipped with rubber pad (4-1).
The brake wheel (8) is rigidly connected with the arm (1) to form a whole.
The beneficial effects of the invention are as follows:
the mechanical mechanism can effectively eliminate noise, and has the advantages of small volume, simple structure, less number of parts, low cost and convenient installation and use.
Drawings
FIG. 1 is a schematic front view of the present invention;
FIG. 2 is a schematic rear view of the present invention;
Fig. 3 is a schematic view of the pawl structure of the present invention.
Wherein 1 is an arm, 2 is a brake, 3 is a connecting rod, 4 is a pawl, 5 is a shaft, 6 is a gear pin, 7 is a ratchet wheel, and 8 is a brake wheel. 4-1 is a rubber pad, and 4-2 is a rubber strip.
Detailed Description
The present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to the following embodiments.
As shown in fig. 1 to 3, when the mechanism is in the idle stroke, the connecting rod moves rightward to drive the pawl to rotate clockwise, and the pawl is lifted first, so that the pawl is out of contact with the ratchet wheel. The arm is not rotated on the shaft due to the frictional resistance of the brake. But when the short finger of the pawl is rotated a further angle and hits the stop pin on the arm, the link forces the arm to pivot against the friction of the brake, whereupon the pawl and arm pivot as a single piece.
In the return stroke of the mechanism, the connecting rod moves leftwards to drive the pawl to rotate anticlockwise, the pawl is meshed with the ratchet wheel, and then the connecting rod drives the whole mechanism to rotate an angle like a whole body including the ratchet wheel and the shaft.
When the link moves rightward, the pawl rotates clockwise because of the hinged connection with the link, and the pawl is lifted. At this time, the pawl is out of contact with the ratchet wheel and is in the idle travel. The brake will give the arm a frictional resistance at this time so that the arm will not rotate on the shaft. But when the short finger of the pawl is rotated a further angle, the rightward movement of the link forces the arm to pivot against the frictional resistance of the brake because of the blocking of the catch pin on the arm, and the pawl and arm pivot on the shaft as a single piece.
When the connecting rod moves leftwards, the pawl rotates reversely to be in a return stroke, then the pawl is meshed with the ratchet wheel, and the connecting rod drives the whole mechanism, including the ratchet wheel and the shaft, to rotate by an angle like a whole.
The pawl is provided with the rubber strip and the rubber pad, so that the rubber strip can not generate hard collision sound when contacting, a certain friction force can be increased by the rubber strip, and a certain friction feeling is generated in the rotating process, but the pawl is flexible and does not generate metal harshness friction sound.
Claims (2)
1. The utility model provides a reliable noiseless operation ratchet, including pawl (4) and ratchet (7), a serial communication port, pawl (4) are connected with arm (1), ratchet (7) are fixed on axle (5) through the key and are connected with arm (1), pawl (4) are located ratchet (7) top, connecting rod (3) are connected with pawl (4), the contact surface of arm (1) and pawl (4), ratchet (7) is provided with shelves round pin (6), the another side of arm (1) is provided with brake wheel (8), brake wheel (8) suit is on axle (5) and rotate around axle (5), a stopper (2) suit with spring pressure is on brake (8), shelves round pin (6) are located pawl (4) recess position, pawl (4) long rod end top is equipped with rubber strip (4-2), one side of pawl (4) long rod end for shelves round pin (6) is equipped with rubber pad (4-1).
2. A reliable noiseless operating ratchet mechanism according to claim 1, characterized in that the brake wheel (8) is rigidly connected to the arm (1) in one piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411888139.4A CN119393499A (en) | 2024-12-20 | 2024-12-20 | A reliable ratchet mechanism with noiseless operation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411888139.4A CN119393499A (en) | 2024-12-20 | 2024-12-20 | A reliable ratchet mechanism with noiseless operation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN119393499A true CN119393499A (en) | 2025-02-07 |
Family
ID=94424578
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202411888139.4A Pending CN119393499A (en) | 2024-12-20 | 2024-12-20 | A reliable ratchet mechanism with noiseless operation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN119393499A (en) |
-
2024
- 2024-12-20 CN CN202411888139.4A patent/CN119393499A/en active Pending
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