CN105822686A - Planetary gear transmission coupling with overload protection function - Google Patents

Abstract

The invention provides a planetary gear transmission coupling with an overload protection function. The planetary gear transmission coupling with the overload protection function comprises a front shell, a planetary gear transmission mechanism, protecting pins and a rear shell. By means of deflection of a planetary gear, the coupling can compensate for the radial offset generated during mounting as much as possible, and can also compensate for the radial offset of two dynamically changing connecting shafts in the operation process. The uniform load characteristic of planetary transmission is good, larger torque can be borne, and large-torque stable transmission is achieved. In addition, when suffering an impact load or overload, the protecting pins fracture to achieve the overload protection function. After the overload problem is solved, the damaged protecting pins are taken out, new protecting pins are inserted, and then the coupling can operate normally. The coupling has good repairability.

Description

A Planetary Gear Transmission Coupling with Overload Protection

technical field

The invention relates to the technical field of couplings, in particular to a planetary gear transmission coupling with overload protection.

Background technique

In the field of mechanical transmission, couplings are used in most cases to transmit the torque of the driving shaft to the driven shaft. Commonly used couplings require high concentricity of the connecting shafts, poor ability to compensate for the radial offset of the two connecting shafts, and most couplings do not have overload protection capabilities when subjected to impact loads or overloads. In view of this situation, a planetary gear transmission coupling with overload protection is now designed.

Contents of the invention

Aiming at the problems of the above coupling, the present invention designs a planetary gear transmission coupling with overload protection. Compensate the radial offset during installation as much as possible, and also compensate the dynamically changing radial offset of the two connecting shafts during operation, use planetary transmission to achieve stable transmission of large torque, and protect the column when subjected to impact load or overload Pin breakage acts as overload protection.

The scheme that the present invention adopts is as follows:

A planetary gear transmission coupling with overload protection, including a front housing, a planetary gear transmission mechanism, a protective pin and a rear housing, the planetary gear transmission mechanism includes a power input sun wheel, a fixed internal gear, and a front-end planetary wheel , planet carrier, movable internal gear, terminal planetary gear, power output center wheel.

When the planetary gear transmission mechanism is in normal operation, the power is input by the power input center wheel, because the fixed internal gear is fixed by the front housing, the input center wheel meshes with the front planetary gear to transmit the power to the planet carrier, and the planet carrier will The power is transmitted to the terminal planetary gear, because the movable internal gear is fixed by the protective pin, and the power is transmitted from the terminal planetary gear to the power output center wheel to realize the transmission of torque.

The planetary gear transmission mechanism adopts a variable gear design to compensate for the radial offset during installation, and can also dynamically compensate the radial offset of the two shafts during operation, which can well realize the connection transmission of the coupling , when there is an impact load or overload during operation, it is equivalent to the output center wheel being fixed, and the movable internal gear will generate torque. When the generated torque is greater than the destructive strength of the preset protection pin, the protection pin will be cut off If it is damaged, the movable internal gear will start to rotate and play the role of overload protection. When the overload problem is solved, take out the damaged protection pin and insert a new one, and the coupling can operate normally. This coupling Good repairability.

The power input center wheel and the power output center wheel have the same module and the same number of teeth.

The front-end planetary gear and the terminal planetary gear have the same module and the same number of teeth.

The fixed internal gear and the movable internal gear have the same module and the same number of teeth.

The front casing is connected with the outside world and is always fixed.

Compared with the existing shaft coupling, the beneficial effects of the present invention are:

Using the displacement of the planetary gear, the coupling can compensate the radial offset during installation as much as possible, and can also compensate the dynamically changing radial offset of the two connecting shafts during operation. The planetary transmission has good load sharing characteristics, can withstand greater torque, and realize stable transmission of large torque. And when the protection pin is broken when subjected to impact load or overload, it plays the role of overload protection. After solving the overload problem, take out the damaged protection pin and insert a new one, and the coupling can operate normally. The coupling has good repairability.

Description of drawings

Fig. 1 is the normal working principle diagram of the present invention;

Fig. 2 is an overload working principle diagram of the present invention;

Fig. 3 is a structural schematic diagram of the present invention.

In the figure: 1. Power input center wheel, 2. Front-end planetary gear, 3. Fixed internal gear, 4. Movable internal gear, 5. Terminal planetary gear, 6. Planetary carrier, 7. Power output internal gear, 8. Rear shell, 9, protection column pin, 10, front shell.

detailed description

The present invention is described further below:

Combining Fig. 1, Fig. 2 and Fig. 3: a planetary gear transmission coupling with overload protection, including a front housing 10, a rear housing 8, a protection pin 9, and a planetary gear transmission mechanism.

The planetary gear transmission mechanism includes a power input sun gear 1, a front-end planetary gear 2, a fixed internal gear 3, a planet carrier 6, a terminal planetary gear 5, a movable internal gear 4, and a power output internal gear 7. During normal operation, the power is input from the power input center wheel 1, because the fixed internal gear 3 is fixed by the front housing 10, the input center wheel 1 meshes with the front planetary gear 2 to transmit the power to the planet carrier 6, and the planet carrier 6 transmits the power Transmission to the terminal planetary gear 5, because the movable internal gear 4 is fixed on the rear housing 8 by the protection pin 9, the power is transmitted from the terminal planetary gear 5 to the power output center wheel 7 to realize the transmission of torque.

When an impact load or overload occurs, it means that the output center wheel 7 is fixed, and the movable internal gear 4 will generate torque. When the generated torque is greater than the destructive strength of the preset protection pin 9, the protection pin will be Being sheared and destroyed, the movable internal gear 4 will start to rotate and play the role of overload protection.

When solving the overload problem, the damaged protection pin 9 is taken out and reinserted into a new protection pin 9, and the shaft coupling can operate normally.

The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the industry should understand that the present invention is not limited by the above-mentioned embodiments, and what described in the above-mentioned embodiments and the description only illustrates the principles of the present invention, and the present invention will also have other functions without departing from the spirit and scope of the present invention. Variations and improvements all fall within the scope of the claimed invention. The protection scope of the present invention is defined by the appended claims and their equivalents.

Claims (4)

1. a Planetary Gear Transmission shaft coupling with overload protection; including procapsid, planetary gear mechanism, protection pin and back casing; it is characterized in that: compensate radial deflection when installing as far as possible; the radial deflection of two connecting shafts dynamically changed is can also compensate in operation process; utilize Gear Planet Transmission to realize high pulling torque stably to transmit, and protection pin fracture is played overload protection and acted on when by shock loading or overload.

A kind of Planetary Gear Transmission shaft coupling with overload protection the most according to claim 1; it is characterized in that: described planetary gear mechanism includes that power inputs centre wheel, and fixed annulus, front end planetary gear, planet carrier, movable internal gear, end planetary gear, power output center are taken turns；During normal operation; power is by power input centre wheel input; because motionless internal gear is fixed by procapsid; input centre wheel engages with front end planetary gear and transfers power on planet carrier; planet carrier transfers power to end planetary gear; because movable internal gear is protected pin to fix, power is delivered to power output center wheel by end planetary gear and realizes the transmission of moment of torsion.

A kind of Planetary Gear Transmission shaft coupling with overload protection the most according to claim 1 and 2, it is characterized in that: be equivalent to output center wheel when running occurs shock loading or overload and fixed, movable internal gear will produce moment of torsion, when the moment of torsion produced is more than when presetting the breakdown strength protecting pin, protection pin will be cut off destruction, movable internal gear will start to rotate the effect playing overload protection, when solving overload problem, the protection pin destroyed is taken out and reinserts new protection pin, shaft coupling just can run well, this shaft coupling recoverability is good.

A kind of Planetary Gear Transmission shaft coupling with overload protection the most according to claim 2; it is characterized in that: described power input centre wheel and power output center are taken turns with modulus with the number of teeth; front end planetary gear and end planetary gear with modulus with the number of teeth; motionless internal gear and dynamic movable internal gear are with modulus with the number of teeth, and procapsid is to be connected with the external world and the most fixed.