What keys are used for secondary joints? What are the shortcuts to accessibility options?

You can use the windows key again, and the delete key to press together, and then it's good to go. If you are satisfied, please give a trouble, I wish you a happy life!

1.Fill in the blank question 1, when the flat key is connected by double keys, the two keys are separated from each other 2, the thin-walled tube shaft and the hub connection should be used 3, the cross-sectional size of the key is pressed 4, the main disadvantage of the wedge key connection is 5, there are three types of ordinary flat keys, namely 6, the centering mode adopted by the involute spline is 7, the rectangular spline adopts 8, the keyway of the A-type flat key is used 9, according to the effect, the pin has 10, the indexing circle pressure angle of the involute spline has 11, the working surface in the flat key connection is 12, and the function of the pin is divided into pin and centering.

2.Multiple choice questionsc, wedge and tangential keys d, flat keys and semicircular bonds

D, L-B 21, can form a tight connection of the two kinds of keys for A, wedge key and semi-circular key B, semi-circular key and tangential key 2, the nominal length of a type ordinary flat key is L, when the width is B, its working length = A, L-2B 3, generally use B, L-B C, L to process the keyway of B type ordinary flat key. B, disc milling cutter A, finger milling cutter C, inserting cutter D, reamer 4, the main advantages of the semi-circular key are.

The auxiliary connection is generally used on the home screen, the most central button, because this type of button controls the center of the entire system.

What kind of button is Unicom? What do you want? This time, you can read the manual, which can generally be controlled with a backshot arrow, or the space bar.

If you use this one, it's usually his connection key.

I don't know what key is used for auxiliary connection, and I don't know exactly what key is used, and I don't know much about this knowledge.

What machine or mechanical program are you talking about?

Toggle the filter key switch: right shift for eight seconds.

It is divided into loose coupling, tight coupling and splined coupling.

Flat couplings and semi-circular couplings belong to loose couplings, while wedge couplings and tangential couplings belong to tight couplings.

1. Flat key connection.

Flat couplings are divided into ordinary flat couplings (for static couplings - i.e., there is no relative axial movement between the shaft and the hub), thin flat couplings (for connections with limited radial dimensions such as thin-walled structures and hollow shafts), and guided sliding couplings (for dynamic couplings, i.e. connections with relative axial movement between the shaft and the hub).

2. Semi-circular key connection.

Similar to a flat key, but it oscillates around its geometric center to accommodate the slope of the keyway on a hub part.

3. Wedge key connection.

The upper and lower surfaces of the wedge key are the working surfaces, and both the upper surface of the key and the bottom surface of the hub keyway have a slope of 1:100. After assembly, the key wedge is tightly placed between the shaft groove and the hub groove.

When working, the torque is transmitted by the friction between the key, the shaft and the hub and the bias pressure on the key, and at the same time, it can bear the axial load in one direction.

4. Tangential key connection.

Tangential keys consist of two ordinary wedge keys with a slope of 1:100. During assembly, two wedge keys are driven from one end of the hub respectively, so that the two inclined planes are opposite, and the common wedge is tightly wedged in the keyway of the shaft and the hub.

Its upper and lower two sides (narrow surface) are working faces, one of which is in the plane through the axis line, and the extrusion force on the working surface acts along the tangent line of the shaft when working. Therefore, tangential couplings work on the principle that torque is transmitted by extrusion of the working surface. One tangential key can only transmit one-way torque, to transmit two-way torque, two tangential keys must be used, and staggered 120 degrees-135 degrees are installed in reverse.

Tangential couplings are mainly used in heavy machines with shaft diameters greater than 100 mm, low requirements for neutralization and large loads.

5. Splined connection.

A splined connection consists of multiple teeth and keyways on the shaft and hub bore. The side of the key tooth is the working surface, and the torque is transmitted by the extrusion of the side of the key tooth. The spline connection has high bearing capacity, high centering accuracy, good guiding performance, and can realize static connection or dynamic connection.

So, in airplanes, cars,

It is widely used in tractors, machine tools and agricultural machinery.

It is best to use a C-shaped flat key, which has a flat end at one end and can be aligned with the shaft end, and an arc end that can penetrate deep into the keyway.

Preferably a C-type key. The C-type key is a flat head at one end, and a round head at one end (in addition, the A-type key is a round head at both ends, and the B-type key is a flat head at both ends), one end of the round head is facing outward, which is convenient for the installation of the shaft hub, and the other end is a flat head to ensure the contact area between the shaft hub and the key, so that the pressure is smaller than that of the A-type key, and the key is less easy to be destroyed.

The purpose of wedge construction is to prevent the axial movement of the shaft hub from slipping.

When the shaft and the hub need to form a sliding connection, the Qigao guide pinnacherry key connection or slide key connection can be used.

If the sliding distance is relatively small, the guide flat key connection can be adopted, and the key is usually fixed on the shaft with screws, and the hub slides relative to the key and the shaft;

If the sliding distance is large, the guide flat key will be too long, and the processing and installation of the side plexus are difficult, so the sliding key connection can be used. The slide key is usually fixed axially to the hub and slides with the hub relative to the keyway on the shaft, where a long keyway is milled.

key joint

The detachable connection of the shaft and the hub parts with a key is a common connection between the shaft and the gear or between the shaft and the pulley. The key is a standard part, which is placed in the keyway of the shaft and the hub, and is divided into three categories: flat key, semi-circular key and oblique key.

Flat key: the side is the working surface, which is attached to the side of the keyway to form a loose connection, and the torque is transmitted by the pressure between the key and the keyway. There are 3 types of flat keys: ordinary flat keys, guide keys and slide keys.

Ordinary flat keys are used for static joints where parts with hubs do not need to move on the shaft; The guide key is fixed on the shaft, while the hub can move along the key; The slider is fixed to the hub and moves along the shaft keyway with the hub. Both the guide and slide keys form a dynamic connection.

Semi-circular key: Similar to a flat key, but it oscillates around its geometric center to accommodate the slope of the keyway on a hub part.

Oblique key: used to form a tight connection, there are mainly two kinds of wedge keys and tangential keys. The underside of the wedge has a 1:

The inclination of 100 is used to form a connection between the shaft and the hub. It mainly relies on friction to transmit torque and axial force, because wedge tightening will cause eccentricity of hub parts, and its application is not as common as flat keys. The tangential key is composed of two wedge keys, which are used in pairs, and the two inclined planes are attached to each other to form a connection, which mainly relies on the tangential direction of the shaft to compress each other and transmit force, which can be used for heavy-duty connection.

The coupling is simple, reliable, easy to assemble and disassemble and cost-effective. Because the keyway will cause stress concentration, it is difficult to obtain accurate centering of the connected parts, and the key coupling has been gradually replaced by the spline connection in the occasions when the load is large and changes frequently or the centering requirements of the parts are high.

Shift in the keyboard is the upper gear key that assists with typing.

The upper key is the shift key! There is one on the left and one on the bottom!

Shift Jian on the left and right sides of the keyboard.

Shift key, one to the far right and one to the far left in the penultimate row of the main keyboard.

Connect this with that! It's hyperconnectivity. If yes. It has many uses, in fact, it is composed of many hyperconnections. The relationship between each web page is linked by hyperlinks.