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Anonymous users2024-02-12High pair: The motion pair formed by the point contact or line contact of two members is collectively referred to as the high pair. Constitute the relative motion between the two members of the plane.
is a tangent line along the line of contact.
Relative movement in direction and relative rotation in the plane, such as rolling pairs, gear pairs, cam pairs.
A scrolling high pair in the picture.
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Anonymous users2024-02-11For example, gear pairs and cam pairs belong to the high pairs. The plane height sub-mechanism has two degrees of freedom, that is, the movement of the tangential direction of the relative contact surface and the rotation of the relative contact point. Comparatively speaking, it is formed by the contact of the surface, which is called the low sub-mechanism.
Classification of senior and deputy institutions.
There are many types of high auxiliary mechanisms, among which the high auxiliary mechanisms that output continuous motion include cam mechanism, friction wheel mechanism, gear mechanism, etc.; The high auxiliary mechanism that outputs intermittent motion includes cam mechanism, ratchet mechanism, groove mechanism, incomplete gear mechanism, etc.
Friction wheel mechanism.
The friction wheel mechanism relies on the friction generated by the normal force of the contact point or contact line of the main and driven wheels to transmit motion and power, so the normal force and friction coefficient are very important for transmission. The friction mechanism can realize the transmission of co-directional, reverse, variable speed and spatial motion, as shown in the "Motion Diagram of Friction Continuously Variable Transmission".
Schematic diagram of the movement of a friction continuously variable transmission.
Cam mechanism. When the cam moves, the driven parts are pushed to reciprocate or oscillate according to a predetermined law through the special contour of the cam. The cam mechanism shown in the figure "Cam Mechanism" can turn the cam rotation of the loser into the reciprocating linear motion of the follower.
Different cams, follower types and motion pairs are adopted, and the cam mechanism can be used to realize the rotation or movement of the cam that loses people into the swing or movement of the output of the follower. By designing the contour curve of the cam, the intermittent movement of the follower can also be realized.
Cam mechanism. Gear mechanism.
The gear mechanism can be used to transmit continuous rotary motion. It can transmit the motion between two axes of space in an arbitrary relationship (parallel, intersecting, staggered, etc.), as shown in the figure "Gear Mechanism". In engineering, the gear mechanism is usually used to realize the rotation of the input driving gear to the output rotation of the driven gear, and when the number of teeth of the two gears meshed is different, the speed increase can be reduced, or the deceleration can be increased.
By using the gear and rack mechanism, the rotation of the gear and the movement of the rack can be converted to each other.
Gear mechanism. Ratchet mechanism.
As shown in the figure "ratchet mechanism", the typical ratchet mechanism, the rocker 1 swings back and forth, so that the pawl 2 pushes the ratchet wheel 3 to move intermittently in the counterclockwise direction, and prevents the ratchet wheel from reversing by the stop claw 4, and the spring 5 is used to ensure that the stop claw 4 can work normally.
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Anonymous users2024-02-101. High sub: The motion constraints may be formed between the two members through point contact, line contact or surface contact. The combination of points, lines, and surfaces that come into contact between two members is called a secondary element. If the secondary element is a point or line, then the pronged pair is a high pair.
2. Low pair: Low pair refers to the moving pair composed of two components through surface contact. Press the relative motion between the two members.
Characteristic low pairs are divided into rotating pairs, moving pairs, and spiral pairs.
3. There are many types of high auxiliary mechanisms, among which the high auxiliary mechanism that outputs continuous motion has a cam mechanism.
friction wheel mechanism, gear mechanism, etc.; The high auxiliary mechanism that outputs intermittent motion includes cam mechanism and ratchet mechanism.
Groove wheel mechanism, incomplete gear mechanism, etc.
4. Low sub-mechanism.
It is a mechanism that consists of connecting each component together only with a low pair. The most commonly used low pairs that constitute the low sub-mechanism are: rotating pair, linear pair, spiral pair and spherical pair, so the low-sub-mechanism is also divided into plane and space mechanisms.
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Anonymous users2024-02-09High and low pairs are the classification of moving pairs in mechanical mechanisms.
The high pair refers to the large dynamic pair formed by the point contact or line contact between the two components, and the common ones are cam mechanism, friction wheel Shenye mechanism, gear mechanism, etc.
The low pair refers to the moving pair formed by the contact between the two components through the surface, and the common ones are rotating pairs, moving pairs, spiral pairs, etc.
The high and low pairs have their own characteristics and applicable scenarios in the mechanical mechanism, and different moving pairs can be selected to meet the specific functional requirements according to the needs.
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Anonymous users2024-02-08The high pair refers to the moving pair that contacts the point or line, and the low pair refers to the moving pair formed by the contact between two members through the surface.
The high pair refers to the motion pair formed by the two members through the point connection and lease land group contact or line contact, and the low pair refers to the motion pair formed by the contact between the two members through the transport surface is collectively called the low pair, according to the relative motion characteristics between the two components, the low pair is divided into the rotating pair, the moving pair, the spiral pair, the low pair generally has the rotating pair, the moving pair, the spiral pair, the high power system pair has wheels and rails, cams and followers, gear transmission, etc.
Difference Between High and Low Officer:
1. The high pair is usually located on one side of the transformer, and the number of turns is more than that of the low pair, so the input voltage can be raised to the output voltage. The high vice is mainly used in power transmission and electronic equipment, such as televisions, computer monitors, etc.
2. The low pair is usually located on the other side of the transformer, and the number of turns is less than that of the high pair, so the input voltage can be reduced to the output voltage. Low pairs are mainly used in electronic devices, such as mobile phone chargers, computer power adapters, etc. <>
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