Geared universal joint 90°

Abstract

Constant velocity joints or homokinetic joints are used for the continuous transmission of rotational movements and torques. They transmit the rotational movement of a driving shaft to a shaft to be driven without changing the speed or torque. The transmission takes place independently of the speed, torque, or the value of a diffraction angle and independently of the speed at which this diffraction angle changes. Constant velocity joints with a diffraction angle of 90° are equipped with specially shaped gear pairs, which are held together by a spring-loaded inner joint. In this joint transmission, a diffraction angle of 90° is achieved while the shafts to be connected to fixedly mounted bevel- and spur gear pairs are connected to each other, so that no spring-loaded inner joint is needed. Therefore, high engine speeds and high torques can be transmitted.

Claims

1. A geared universal joint for connecting a pair of shafts, comprising: two joint forks with rotatably mounted bevel- and spur gear pairs for the positive transmission of a rotational movement at an angular offset of the pair of shafts or variable diffraction angle between the pair of shafts up to 90°, wherein each joint fork (4, 22) comprises a connection bevel gear (1, 25) with a coaxial recess disposed at a front of the joint fork, wherein in each joint fork (4, 22) a 1st bearing (3, 24) accommodates the connection bevel gears (1, 25), and a 2nd bearing (7, 19) accommodates first bevel gears (5, 21) and first spur gears (8, 18), further a 3rd bearing (11, 16) accommodates second spur gears (9, 17), which are in turn connected to second bevel gears (12, 14), and the second bevel gears (12, 14) are mutually engaged with each other via a cross-axle (13), hinged, and each are freely rotatably connected, and in each joint fork (4,22) the connection bevel gear (1, 25) is in mutual engagement with at least one first bevel gear (5, 21) and via a coaxial 1st bearing (3, 24) is free-rotationally connected to the joint fork (4, 22).

2. The geared universal joint according to claim 1, wherein the first bevel gear (5, 21) freely rotatable about the 2nd bearing (7, 19) on each joint fork (4, 22) is connected to a spur gear (8, 18) at right angle.

3. The geared universal joint according to claim 1, wherein the first spur gear (8, 18) in mutual engagement via the 3rd bearing (11, 16) on each joint fork (4, 22) is freely rotatably connected to the second spur gear (9, 17).

4. The geared universal joint according to claim 1, wherein the second spur gear (9, 17) freely rotatable about the 3rd bearing (11, 16) on each joint fork (4, 22) is connected to the second bevel gear (12, 14) coaxially on the 2nd bearing axle.

5. The geared universal joint according to claim 1, wherein each of the second bevel gears (12, 14) is freely rotatably mounted on the cross-axle (13) and is in mutual engagement with each other with at least one of the second bevel gears (12, 14) at right angles.

6. The geared universal joint according to claim 1, wherein the cross-axle (13) is rotatably connected to the two joint forks (4, 22), coaxially rotated by 90° to each other, and the two joint halves are freely rotatably held together with a diffraction angle of max 90°.

7. The geared universal joint according to claim 6, wherein the joint fork (4, 22) M a drive-train has a total of three bearing axles, of which the 1st bearing axle (2, 23) is coaxially connected to the connection bevel gear (1, 25), the 2nd bearing axle (6, 20) is provided for the coaxial accommodation of the first bevel gears (5, 21) with first spur gears (8, 18), the 3rd bearing axle (10, 15) coaxially accommodates the second spur gears (9, 17) and the second bevel gears (12, 14), and the 2nd bearing axle (6, 20) next to the 3rd bearing axle (10, 15) is respectively perpendicular to the 1st bearing axle (2, 23).

8. The geared universal joint according to claim 6, wherein the joint forks (4, 22) have a scaled fork to allow the installation of the cross-axle 13 in respective joint forks (4, 22) of an inner fork side.

9. The geared universal joint according to claim 1, wherein the cross-axle (13) at its ends is adapted for the accommodation of each one of second bevel gears (12, 14) and second spur gears (9, 17), of which adjacent second bevel gears (12, 14) are in mutual engagement with each other, and thereby respectively axially opposite second bevel gears (12, 14) rotate in opposite rotation directions.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Advantageous embodiments of the invention are shown in the following drawings and described in detail below. It shows:

(2) FIG. 1 is the front view of a 90°-joint transmission in the stretched position,

(3) FIG. 2 is the section A-A of the 90°-joint transmission,

(4) FIG. 3 is the isometric view of the 90°-joint transmission,

(5) FIG. 4 is the front view of the 90°-joint transmission in the 90° position,

(6) FIG. 5 is the section B-B of the 90°-joint transmission,

(7) FIG. 6 is the isometric view of the 90°-joint transmission in the 90° position.

DETAILED DESCRIPTION

(8) The 90°-joint transmission with spur- and bevel gears, as apparent in FIG. 1, is shown with two joint forks (4, 22) and connection bevel gears (1, 25). Depending on the application, the connection bevel gears (1, 25) can be designed with conventional connectors such as a flange or locking-pins.

(9) The cross-axle 13 can be designed with through-holes, plugs and a grease fitting in order to provide sufficient lubrication at the bearing points. The 90°-joint transmission can also be surrounded by a grease-filled bellows. Thus, one achieves a permanent lubrication, protection against pollution, and protection against reaching into the gearing. In addition, the gearing can be carried out with a straight-, oblique- or spiral gearing.

(10) The connection bevel gear 1 is rotatably mounted on the 1st bearing axle 2, connected to the joint fork 4, and drives the bevel gear 5 on the 2nd bearing axle 6. The bevel gear 5 is positively connected to the spur gear 8. These two gears are divided due to manufacturing and could also be made in one piece.

(11) The spur gear 8 on the 2nd bearing axle 6 drives the spur gear 9 on the 3rd bearing axle 10. Via the spur gear 9, the power transmission is positively transmitted to the bevel gear 12. In this case, both gears (9, 12) are freely rotatably mounted on the 3rd bearing axle 10. The joint fork 4 has, per drive-train, 3 bearing axles, in order to be able to accommodate the respective bevel- and spur-gears, freely rotatably mounted. Thus, the joint fork 4 has a total of 5 bearing axles for both drive-trains. The two bevel gears 12 and 14 are in mutual engagement and are freely rotatable on the cross-axle 13. In this case, the power transmission takes place according to the diffraction angle up to max. 90° via the cross-axle 13 from the first to the second joint half.

(12) The joint forks (4, 22) have a scaled fork to allow the installation of the cross-axle 13 in each joint fork (4, 22) of the fork inside.

(13) The bevel gear 14 drives the spur gear 17 on the 3rd bearing axle 15. In this case, the spur gear 17 and the bevel gear 14 are positively connected to each other, wherein both gears are freely rotatably mounted on the 3rd bearing axle 15. The spur gear 17 on the 3rd bearing axle 10 drives the spur gear 18 on the 2nd bearing axle 20. The spur gear 18 is positively connected to the bevel gear 21. The bevel gear 25 is rotatably mounted on the 2nd bearing axle 20, connected to joint fork 22 and drives the connection bevel gear 25 on the 1st bearing axle 23.

(14) The torque and speed transmission is available, at any diffraction angle up to max. 90°, consistently from the driving-to the joint half to be driven. For the sake of uniform load discharge into the joint forks (4, 22) and uniform distribution over each gearing, all bevel- and spur gear connections are also arranged on each opposite side, wherein the rotation direction of the opposite gear is naturally opposite.

(15) The connection bevel gear 1, which is connected to the joint fork 4 on the 1st bearing axle 2, drives the two bevel gears 5 on the 2nd bearing axle 6. Wherein a bevel gear 5 is driven forward and the opposite bevel gear is driven in the opposite direction. Each of the two bevel gears 5 is fixedly connected to a spur gear 8. Each spur gear 8 on the 2nd bearing axle 6 drives each spur gear 9 on the 3rd bearing axle 10, each side with opposite rotation direction. Via each 3rd bearing axle 10 and 15 of the cross-axle 13, the power transmission is carried out from one joint half to the other joint half.

(16) The two bevel gears 12 and 14 are mutually engaged, as well as each opposite bevel gears. Thus, there are a total of 4 bevel gears on the cross-axle 13, of which in each case the opposite bevel gear naturally has an opposite rotation direction. In this case, the power transmission takes place from the first to the second joint half, according to the diffraction angle up to max. 90°

(17) The bevel gear 14 and the bevel gear opposite thereto drive together each of the two spur gears 17 on the 3rd bearing axle 15. The spur gears 17 and the bevel gears 14 are fixedly connected to each other, wherein both gears are freely rotatably mounted on each joint fork in the 3rd bearing axle 15. The spur gear 17 on the 3rd bearing axle 10 drives the spur gear 18 on the 2nd bearing axle 20, as well as in the opposite rotation, the spur gear opposite thereto of the other joint fork. The spur gear 18 is fixedly connected to the bevel gear 21. Both bevel gears 25 are rotatably mounted on the 2nd bearing axle 20 with the joint fork 22, and drive together the connection bevel gear 25 on the 1st bearing axle 23. In this case, the bevel gear 21 drives forward and the opposite bevel gear naturally in the opposite rotation direction.

LIST OF REFERENCE NUMBERS FOR 90°-JOINT TRANSMISSION

(18) For the first joint half:

(19) 1. connection bevel gear

(20) 2. 1st bearing axle

(21) 3. 1st bearing

(22) 4. joint fork

(23) 5. bevel gear

(24) 6. 2nd bearing axle

(25) 7. 2nd bearing

(26) 8. spur gear

(27) 9. spur gear

(28) 10. 3rd bearing axle

(29) 11. 3rd bearing (cross-axle)

(30) 12. bevel gear

(31) For connection of both joint halves:

(32) cross-axle

(33) For the 2nd joint half:

(34) 13. bevel gear

(35) 14. 3rd bearing axle

(36) 15. 3rd bearing (cross-axle)

(37) 16. spur gear

(38) 17. spur gear

(39) 18. 2nd bearing

(40) 19. 2nd bearing axle

(41) 20. bevel gear

(42) 21. joint fork

(43) 22. 1st bearing axle

(44) 23. 1st bearing

(45) 24. connection bevel gear