Universal joint, and coupling kit of universal joint

Abstract

To provide a universal joint with no unequal-speed motion, and provide smooth rotation of power transmission even when joint yokes restraining the unequal-speed motion are linked with each other by a coupling kit to increase a refraction angle is made big.SOLUTION: According to the present invention, a universal joint has a pendular movement type not via a joint cross which is a possible cause of an unequal motion. A coupling kit for coupling the universal joint has such depth that two joining pins are displaced from each other in both end side directions of a shaft rod or a cylinder or orthogonal to the shaft rod or the cylinder inside a short shaft rod or a cylinder, so as to restrain an inclination operation of the coupling kit. Or, the joint cross is fixed to inside of a ring, and the ring is rotatably fixed to a body side of a chassis and the like, so as to make only a rotation action of original power transmission.SELECTED DRAWING: Figure 15

Description

[Technical field]

[0001] The present invention relates to a universal joint. [Background technology]

[0002] In a universal joint, the input and output shafts are bent and joined together, There is a Cardan joint consisting of one cross shaft and two joint yokes. The Cardan joint has the problem of non-uniform motion, but a method of installing two Cardan joints in series to cancel out the non-uniform motion has been adopted. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent application 2022-138596 [Patent Document 2] Patent Publication 2018-184981 [Patent Document 1] Patent Publication 2009-168190 Summary of the Invention [Problem to be solved by the invention]

[0004] The object of the present invention is to provide a universal joint that does not generate non-uniform motion and a coupling device that corresponds to the universal joint that does not generate non-uniform motion, thereby enabling efficient linkage between an input shaft and an output shaft and increasing the range of the bending angle. [Means for solving the problem]

[0005] In order to solve the above problems, the present invention employs the following means. The joint yoke is designed without using the cross shaft of the Cardan joint, which is a major cause of non-uniform motion.

[0006] Claim 1 of the present invention is as follows: At the universal joint, The tip of the power transmission shaft 51, either the input shaft or the output shaft, is a hinge mechanism portion 80, The pendulum unit 70 is provided on the hinge mechanism unit 80 so as to be hinged. The other power transmission shaft 51 is provided with a pendulum part receiving device 75 having a sliding wall surface portion 76 that contacts both sides of the pendulum part 70 and captures it so that it can slide freely. The pendulum unit 70 swings like a pendulum by hinge action from the hinge mechanism unit 80 to the tip side. The pendulum part receiving device 75 is provided on the other power transmission shaft 51 and is slidably received by the slide wall surface portion 76 of the pendulum part receiving device 75, It is designed to transmit rotational power. Universal joint characterized by

[0007] This process is If the power transmission shafts are connected to each other by extending the power transmission shafts from the diagonally downward direction on both sides, with the bent portion of the hinge mechanism provided at the tip of one of the power transmission shafts as the apex, The pendulum part receiving device provided at the tip of one of the power transmission shafts faces the tip side of the sliding wall part in an obliquely upward direction toward the hinge structure part on the rotation center line of the power transmission shaft on the own side, The pendulum part reciprocates like a pendulum in the direction of bending the tip side from the hinge mechanism part while rotating by the power transmission, When the hinge pin of the hinge mechanism is in a horizontal position, the pendulum part is bent by the hinge action upward toward the center line of rotation of the opposing power transmission shaft, which is diagonally downward. When the hinge pin is vertical, the hinge does not bend, but points its tip in a straight line on the center line of rotation of the power transmission shaft on its own side, which is further diagonally upward from the apex. From this upward position, the rotation of the power transmission causes the hinge pin to move from vertical to horizontal, and the pendulum part also moves in a hinge motion, moving upward along the center line of rotation of the power transmission shaft, which is the counterpart of the downward position. The surface of the sliding wall portion of the pendulum portion receiving device also changes from a vertical orientation to a horizontal orientation.

[0008] Next, the contact surface between the pendulum part that transmits power and the pendulum part retainer is as follows: The pendulum part side is the side that is bent by the hinge action and swings in both directions, and the both sides are either the outer side or the wall surfaces on both sides of the corridor-like space provided inside the pendulum part. The pendulum part receiving device is configured to be slidably connected in a shape that is clamped from the outside or fitted inside according to the shape of the pendulum part.

[0009] Claim 2 of the present invention is as follows: In claim 1, The pendulum portion holder 75 is provided on both the input shaft and the output shaft of the power transmission shaft 51, The pendulum portion 70 is provided as an independent part that is not fixed. The position where the center lines of the input shaft and the output shaft intersect is set as the base point of the center of the pendulum motion of the pendulum unit 70, and the base point is set as the pendulum unit intermediate portion 72 of the pendulum unit 70, The pendulum part intermediate portion 72 is formed in a rectangular prism shape, and the pendulum parts 71 of the pendulum part 70 are extended from both ends of the rectangular prism,

[0010] Both sides of the pendulum portion 71 on both sides are provided as sliding surfaces for contact surfaces for power transmission, The slide surfaces are on different sides of the input shaft and the output shaft, That is, among the four faces of the four-sided rectangular prism extending from the pendulum part intermediate portion 72 to the pendulum part 71, the two opposing faces are the two faces on the input shaft side and the output shaft side that are different from each other, The pendulum part receiving devices 75 provided on the power transmission shafts 51 of both the input shaft and the output shaft are also arranged so that the orientations of the slide wall parts 76 face each other in different directions of 90 degrees so as to receive the pendulum parts 71 facing the respective sides. Universal joint characterized by

[0011] This eliminates the hinge mechanism provided at the tip of the power transmission shaft on either the input shaft or the output shaft of claim 1, and The hinge operating position of the hinge mechanism or the position where the center lines of the input shaft and the output shaft intersect is defined as: The pendulum part is a free, independent part that is not fixed to the power transmission shaft on either the input shaft or the output shaft. The pendulum parts are extended symmetrically on both sides of the pendulum part, and the intermediate position is set as the base point of the pendulum motion. The left and right pendulum parts are symmetrical, and the positions of the sliding surfaces on both sides of the pendulum part that slide in contact with the sliding wall surface parts of the pendulum part receiving devices provided on both of the power transmission shafts of the input shaft and the output shaft are on both sides that are 90 degrees different from each other in the left and right pendulum parts that are symmetrical, Similar to the process in paragraph 0007

[0012] If the left side of the power transmission shaft on both sides of the input shaft and the output shaft is horizontal and the right side is extended diagonally downward to connect the power transmission, When the surface of the sliding wall part of the left pendulum part receiving device is vertical, When the surface of the sliding wall part of the right pendulum part receiving device is horizontal, The left pendulum part is pointing diagonally upwards to the left, and the sliding surface is also vertical. The pendulum part on the right faces diagonally downward to the right, and the sliding surface is also oriented horizontally. In the case where the surface of the sliding wall surface of the left pendulum part receiving device is vertically oriented, the pendulum part on the pendulum part receiving device side has a hinge operating part vertically oriented and cannot bend, but slides upward along the sliding wall surface, The pendulum portion within the sliding wall surface of the pendulum portion receiver in the horizontal position on the right side is guided downward toward the power transmission shaft on the pendulum portion receiver side and is pushed down while bending by hinge action.

[0013] In addition, the pendulum part is a free-standing component, When the pendulum part rotates due to power transmission, the intermediate position of the pendulum part is held as a center point of rotation and pendulum motion by the rotational force of the pendulum part itself and is held by the sliding wall part of the pendulum part holder.

[0014] Next, when the power transmission shafts of the input shaft and output shaft, whose tips face each other at a bent angle, are not fixed but are connected by the universal joint of the present invention in a state in which the bent angle is free, a hook or protrusion or the like may be provided on the pendulum part holder or on the pendulum part as a fastener for preventing the pendulum part from falling off and detaching from the pendulum part holder in a position that does not interfere with the pendulum motion of the pendulum part.

[0015] Claim 3 of the present invention is as follows: In the coupling device 19 provided for connecting universal joints provided on the power transmission shaft 51 of the input shaft and the output shaft,

[0016] Two pins 28 are arranged on the inside of a cylinder or on a shaft rod, and are arranged like a cross shaft of a Cardan joint, with two straight pins 28 integrated in a cross shape. The two pins 28 are separated one from the other and are arranged perpendicular to the rotation center line of the cylinder or shaft rod with a gap between them. The universal joint is connected to the nearest one of the pins 28 from both sides of the rotation center line of the cylinder or shaft by a connecting device 19. A versatile joint brace 19.

[0017] The reason for separating the two pins and providing a space between them is to prevent non-uniform motion of the power transmission shafts on both the input shaft and the output shaft, such as a cross shaft, which tilts alternately. The separation distance is preferably equal to or greater than the length of the long side of the pin. The larger the separation distance, the less the vibration caused by the non-uniform motion of the connecting device will be, resulting in a stable rotation of the power transmission. In addition, it is considered that there is no problem whether the two pins, which are respectively arranged perpendicular to the center line of rotation of the cylinder or shaft rod, are arranged perpendicular to each other at an angle of 90 degrees, as with the cross shaft, or whether they are arranged perpendicular to each other at an angle in the same direction, etc.

[0018] When this connecting device is a cylindrical connecting device, the joint portion provided on the universal joint fits inside the tube and is joined to each of the two pins. However, the end of the tube on the outside from the pin is extended long so that the portion up to the vicinity of the base of the universal joint is stored inside the tube, and the end of the tube comes into contact with the base of the universal joint depending on the bending angle, thereby preventing bending beyond the expected angle.

[0019] In addition, in the case of an axial rod-type connecting device, a cup-shaped tubular portion can be provided to cover each of the pins from the center side of the axial rod, and the universal joint can be stored up to its base inside the cup-shaped tube, similar to the above-mentioned tubular connecting device.Depending on the bending angle between the universal joint and the axial rod-type connecting device, the end of the cup-shaped tubular portion can abut against the universal joint, preventing bending beyond an expected angle.

[0020] Claim 4 of the present invention is as follows: In the coupling device 19 provided for connecting universal joints provided on the power transmission shaft 51 of the input shaft and the output shaft,

[0021] A cross shaft 30, which is formed by crossing two pins 28 of a Cardan joint, is fixed perpendicularly to the inside of the ring to form an inner ring 32 with a built-in cross shaft. Further, an outer ring fitting 33 for a ring with a built-in cross shaft is provided to rotatably accommodate the inner ring 32 with a built-in cross shaft, and the outer ring fitting 33 for a ring with a built-in cross shaft is fixed to the main body side such as a chassis. This is a universal joint device characterized by its

[0022] This is because the outer ring is fixed to the main body such as the chassis so that it can rotate freely, just like the power transmission shaft, so that the cross shaft, which is integrated with the inner cross shaft built-in ring, does not generate any tilting movement other than rotation for power transmission on the main body such as the chassis. Effect of the Invention

[0023] Conventional cardan joints, which consist of a joint yoke and a cross shaft for bending and connecting power transmission shafts, A cross shaft is connected to a joint yoke, which is a bifurcated end tool fixed to each of the power transmission shafts of the input and output shafts, and the pins of the cross shaft tilt toward each power transmission shaft and swing to transmit rotational power. During high-speed rotation, the swing also becomes very fast, which poses a risk of damage to the power transmission shaft, etc.

[0024] The effects of the universal joint and universal joint attachment of the present invention are as follows: The universal joint has a simple structure that does not require the cross shaft of a Cardan joint, which is the main cause of non-uniform motion. By using a connecting device corresponding to the universal joint of the present invention, which does not require the cross shaft of a Cardan joint, it becomes possible to transmit stable rotational power even if multiple universal joints of the present invention are connected in series to increase the bending angle. This connecting device can also be used as a connecting device for the universal joint of a seesaw-type joint yoke, in which the joint parts on both sides of the seesaw-type joint yoke alternately protrude and oscillate like a seesaw, as in Patent Document 1, which does not require the cross axis of a Cardan joint. [Brief description of the drawings]

[0025] [Figure 1] FIG. 1 is a plan view of a universal joint in which the tip of one power transmission shaft 51 of claim 1 is a pendulum part 70 that operates as a hinge, and the tip of the other power transmission shaft 51 is a pendulum part receiving tube 75. [Diagram 2] FIG. 2 is a side view of FIG. [Diagram 3] 2, but rotated 90 degrees from FIG. 2 to show a state in which the pendulum portion 70 is bent by hinge action. [Figure 4] FIG. 2 is a plan view of the pendulum portion 70 of claim 2, which is formed as a single independent part. [Diagram 5] FIG. 5 is a front view of FIG. [Figure 6] FIG. 6 is a side view of FIG. [Figure 7] FIG. 1 is a plan view of a pendulum portion holder 75 provided on both the input shaft and the output shaft of claim 2. [Figure 8] FIG. 8 is a front view of FIG. [Figure 9] FIG. 9 is a side view of FIG. [Figure 10] FIG. 10 is a bottom view of FIG. [Figure 11] 10 is a side view of an embodiment of a universal joint consisting of the pendulum part 70 of FIGS. 4 to 6 and the pendulum part receiving device 75 of FIGS. [Figure 12] FIG. 2 is a perspective view of the pendulum portion 70 of claim 2, which is made of a square prism as a whole. [Figure 13] FIG. 12 is a side view of an embodiment comprising a pendulum portion 70 and a pendulum portion retainer 75 which are generally square prisms. [Figure 14] 2 is a side view of the cylindrical connecting device 20 of claim 3. [Figure 15] FIG. 15 is a front view of an embodiment, and the hatched area in the center is a cross section of the tubular connector tube 21 of the tubular connector 20 in FIG. 14, and represents the pendulum section 70 and pendulum section receiver 75 connected on both sides by the hinge mechanism section 80 of claim 1. [Figure 16] FIG. 2 is a side view of the shaft rod type connecting device 25. [Figure 17] FIG. 16 is a front view of the connector cup 27, and the hatched portion is a cross section of the connector cup 27, and represents the pendulum portion 70 and the pendulum portion receiver 75 connected on both sides by the hinge mechanism portion 80 of claim 1. [Figure 18]FIG. 16 is a front view of the seesaw joint yoke 10 of Patent Document 1, and shows an embodiment in which rod-type connecting portions 17 which perform seesaw motion are connected from the left and right. [Figure 19] FIG. 2 is a side view of the tubular connector 20, in which two spaced apart pins 28 are arranged in the same direction rather than crossed. [Figure 20] FIG. 19 is a front view of FIG. 19, and the hatched area with oblique lines at the top and bottom indicates a cross section of the tubular connecting device tube portion 21. [Figure 21] is an embodiment of FIG. [Figure 22] 21 is a front view of the tubular connector 20 in FIG. 20 with the tubular connector outer tubular portion 23 attached to the outer periphery shown in cross section hatched with oblique lines. [Figure 23] This is an embodiment in which power is transmitted by a double-type seesaw action yoke 13 having a slide wall surface component 41 of Patent Document 1 and a connecting portion 17 at each end of a double-type seesaw yoke connecting portion 14, and two cylindrical connecting devices 20 as shown in FIG. 22. [Figure 24] 23 are connected in a set of four, and are then covered with a coil spring 56 and a resin tube 57, which are then connected to a tire 55. [Diagram 25] 5 is a front view of an embodiment of an outer circumferential ring mounted type cross shaft 31 fixed to a chassis 54, and the hatched portion with oblique lines is a cross section of the main body side of the chassis 54, etc. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0026] A universal joint that suppresses or does not generate non-uniform motion, and a connecting device 19 that connects the universal joints in a bendable manner,

[0027] Claim 1 of the present invention is as follows: At the universal joint, The tip of one of the power transmission shafts 51, the input shaft and the output shaft, facing each other at a bent angle, is made into a hinge mechanism portion 80, A pendulum portion 70 made of a square pillar or a plate is provided on the hinge mechanism portion 80 so as to be hinged toward the other power transmission shaft 51,

[0028] The other power transmission shaft 51 is provided with a pendulum part receiving device 75 having a sliding wall surface portion 76 that closely contacts both sides of the side in the direction in which the pendulum part 70 swings by hinge action so as to be able to slide. The pendulum part 70 swings back and forth like a pendulum by hinge action from the hinge mechanism part 80 to the tip side. The pendulum part is supported by a sliding wall part 76 of a pendulum part receiving device 75 provided on the other power transmission shaft 51 so as to be slidably movable.

[0029] The sliding surfaces on both sides of the pendulum part 70 in the direction of swinging by the hinge action come into contact with the sliding wall part 76 of the pendulum part receiving device 75 and slide together to transmit the power and rotate, thereby transmitting the rotational power.

[0030] Claim 2 of the present invention is as follows: In claim 1, The ends of the power transmission shafts 51 of both the input shaft and the output shaft, which are opposed to each other at a bent angle, are provided as pendulum part receiving fixtures 75 instead of hinge mechanism parts 80, The pendulum portion 70 is provided as a single, independent, free, unitary part.

[0031] The pendulum section 70 is installed at a position where the center lines of the input shaft and the output shaft intersect, and this position is set as the base point of the center of the pendulum motion of the pendulum section 70. The base point is set as the pendulum section middle part 72 of the pendulum section 70. The pendulum section middle part 72 is in the shape of a square prism. The pendulum portion 71 of the pendulum unit 70 is extended from both ends of the rectangular prism toward both the input shaft side and the output shaft side,

[0032] The two opposing surfaces of the pendulum portion 71 provided on both sides are provided as sliding surfaces for the contact surface for power transmission. The input shaft side and the output shaft side have different surfaces that act as sliding surfaces for power transmission. That is, of the four faces extending from the pendulum middle part 72 of the four-sided rectangular prism to the pendulum part 71, the two opposing faces are set to be the two faces on the different sides on the input shaft side and the output shaft side, The pendulum part receiving devices 75 provided on the power transmission shafts 51 of both the input shaft and the output shaft are also arranged so that the orientations of the slide wall parts 76 are different by 90 degrees to face each other and each can receive the pendulum part 71 facing the own side.

[0033] Claim 3 of the present invention is as follows: A coupling device 19 is provided for connecting the universal joints provided at the ends of the input shaft and the output shaft of the power transmission shaft 51, The connecting device 19 is made into a cylindrical connecting device 20 or an axle rod type connecting device 25, and the two crossing pins 28 constituting the cross shaft are separated into one pin each,

[0034] The cylindrical connecting device 21 or the shaft rod type connecting device 25 is provided perpendicular to the center line of rotation that transmits the rotational power with a space therebetween, The universal joint attachment 19 according to claim 1, characterized in that each of the seesaw action type joint yokes 10 can be joined to the nearest pin 28 from both sides of the center line, or the universal joint attachment 19 does not generate uneven velocity motion of the seesaw action type joint yokes 10, etc.

[0035] In claim 4 of the present invention, The cross shaft, which is made by crossing two pins of the Cardan joint, is fixed perpendicularly to the inside of the ring, The ring with the cross shaft provided on the inside is called a cross shaft built-in ring 32,

[0036] Furthermore, an outer ring is provided to rotatably house the built-in cross shaft ring 32, and the outer ring is rotatably fixed to the main body side such as the chassis, A universal joint connecting device 19 characterized in that the cross shaft, which is integral with the fixed cross shaft built-in ring 32, is arranged so that non-uniform motion other than rotation for power transmission does not occur on the main body such as the chassis 54. EXAMPLES

[0037] 1 to 3 show a universal joint in which the tip of one of the power transmission shafts 51 of claim 1 is a pendulum part 70 that performs hinge operation, and the tip of the other power transmission shaft 51 is a pendulum part receiving device 75. In FIG. 1, the power transmission shafts 51 are connected at a bending angle of 30°, and the power transmission shaft 51 on the right side is in a horizontal position. This is a plan view showing the left power transmission shaft 51 extending obliquely downward to connect the power transmission. The pendulum unit 70 is provided on the hinge mechanism pin 81 of the hinge mechanism unit 80 at the tip of the right power transmission shaft 51. The left power transmission shaft 51 is provided with a power transmission shaft mounting tube 53 and a pendulum part receiving device 75 for connecting with the power transmission shaft 51. The pendulum portion 70 is shown in a state in which it is housed in about two-thirds of the sliding movement space 79 of the pendulum portion receiving device 75 which is made up of a sliding wall surface component 77 having a sliding wall surface portion 76 on the inside.

[0038] FIG. 2 is a side view of FIG. 1, and shows the state in which the hinge mechanism pin 81 of the hinge mechanism part 80 of the right-side power transmission shaft 51 is in a vertical position, and the pendulum part 70 connected to the hinge mechanism pin 81 in a hinged manner is straight and not bent horizontally by the hinge action, and is stored in the sliding movement space 79 of the pendulum part receiver 75 provided on the left-side power transmission shaft 51.

[0039] FIG. 3 is a side view similar to FIG. 2, but shows a state in which the pendulum portion 70 has rotated 90 degrees from the state in FIG. 2 due to the rotation of the power transmission and is bent downward by 30 degrees due to the hinge action.

[0040] Figs. 4 to 11 show a universal joint in which a pendulum part holder 75 is provided on both the input shaft and the output shaft of claim 2, and the pendulum part 70, which plays the role of a cross shaft that enters between the input shaft and the output shaft and transmits rotational power, is provided as a single independent part.

[0041] 4 to 6 show the pendulum section 70. The tips of the pendulums on both ends of the pendulum part 70 extending from the middle part 72 of the pendulum part 70, are each shaped like one side of a circle drawn by the pendulum motion. The longitudinal sides of the wide pendulum portion 71 at both ends of the spread are oriented in different directions by 90 degrees. As shown in FIG. 4, a vertically long pendulum portion 71 on the front side and a horizontally long pendulum portion 71 on the back side face each other with a pendulum middle portion 72 therebetween.

[0042] In the plan view of FIG. 4, the vertically long rectangle in the center is expanded vertically around the tip of the pendulum portion 71 on the front side of the pendulum part 70, The horizontally long rectangle is widened horizontally by the pendulum part 71 at the back, and in plan view, the long sides of the periphery constituting the wide surfaces of the pendulum parts 71 on both sides, the front and rear, intersect at right angles like a cross. This is because the pendulum part middle part 72 is made of a regular square and the two opposing sides of the square prism are widened on both sides, but the two ends are widened from both sides of different regular squares, The thickness is also increased widely from the intermediate portion while maintaining the same thickness.

[0043] In addition, the protrusions on both sides of the tip of the widely spread pendulum portion 71 act as stoppers that mark the limit of the inclination angle of the swing of the pendulum portion 70, and also as anti-detachment protrusions 73 that prevent the pendulum portion from falling off the pendulum portion fastener 75.

[0044] 5 is a front view of FIG. 4, and FIG. 6 is a side view of FIG. 4. In FIG. 5 and FIG. 6, the orientation of the semicircular pendulum sections 71 at both ends of the pendulum section 70, as shown above and below, differs by 90 degrees, and the central section is a pendulum section intermediate section 72 consisting of a regular square.

[0045] 7 to 11 show a pendulum part receiving device 75, which corresponds to the pendulum part 70 of claim 2 shown in Figs. 4 to 6. FIG. 7 is a plan view, and the vertically long portion in the center is a sliding movement space 79 that stores the pendulum portion 70 so that it can slide freely, and the portion where the three squares on both sides are connected vertically is a sliding wall component portion 77 that constitutes the sliding wall portion 76, and the intermediate square between the three is a sliding wall component portion tip portion 78 that narrows toward the tip side.

[0046] FIG. 8 is a front view. The upper side of the left and right sliding wall components 77 that make up the pendulum section receiving device 75 is the sliding wall component tip 78, which continues to the power transmission shaft mounting tube 53 and the power transmission shaft 51 at the lower part.

[0047] FIG. 9 is a side view of FIG. 8, showing that the tip portion 78 of the sliding wall surface forming portion 77 on the upper side is narrow, and shows the power transmission shaft mounting tube portion 53 and the power transmission shaft 51 on the lowermost side. FIG. 10 is a bottom view of FIG. 9, and the shaded circular area inside the central power transmission shaft mounting cylinder portion 53 indicates the cross section of the dynamic power transmission shaft 51.

[0048] FIG. 11 is a side view of an embodiment of the pendulum part 70 of FIGS. 4 to 6 and the pendulum part holder 75 of FIGS. 7 to 10. The left and right pendulum part receiving devices 75 are fitted in a sliding movement space 79 on the inside of the sliding wall part 76 of the sliding wall part 77 of the sliding wall part 77. The pendulum portion 71 on both ends of the pendulum portion 70, which has a semicircular tip end, The pendulum part receiving device 75 is fitted between the slide wall surface portions 76 of the pendulum part receiving device 75 as slide surfaces in contact with each other, and the .... The pendulum portion 71 has anti-detachment projections 73 at both ends on the wide side thereof. The portion of the pendulum portion 70 that contacts the tip end 78 of the sliding wall surface component is the pendulum portion intermediate portion 72 .

[0049] FIG. 12 is a perspective view of a square-prism-type pendulum section 70 of claim 2, in which the entire pendulum section 70 is made of a square prism, with circular anti-detachment recesses 74 provided on each of the four opposing faces at the midpoint of the center of the long sides of the square prism.

[0050] FIG. 13 is a side view of an embodiment of the universal joint of claim 2, which is composed of the pendulum part 70 of FIG. 12 and the pendulum part receiving device 75 of FIG. 9. The pendulum part receiving device 75 has a sliding wall surface forming part tip 78 provided with a separation prevention convex part 73, which is fitted into a separation prevention concave part 74.

[0051] The measure to prevent this separation is as follows: when the pendulum part 70 rotates due to the transmission of power, the pendulum part 70 rotates around the midpoint of the two opposing power transmission shafts 51 as the center point of rotation and pendulum motion, and rotates around the pendulum part middle part 72, and is held in place by the rotational force of the pendulum part 70 itself. This is because there is a possibility that the pendulum part 70 may fall out of the slide movement space 79 and become separated from the yoke 60 when the rotation of the power transmission is slow or stopped. However, the thickness of the separation prevention protrusion 73 is about one third of the diameter of the circle of the separation prevention recess 74 so that the pressure of the rotational power from the power transmission shaft 51 is not applied to the separation prevention protrusion 73. The transmission of rotational power is achieved only by contact between the surface of the pendulum portion 71 of the pendulum portion 70 and the slide wall surface portion 76 of the pendulum portion retainer 75.

[0052] 14 and 15 show a cylindrical connecting device 20. In the side view of FIG. 14, the pin 28 for the joint at the front of the inside of the cylindrical portion 21 of the cylindrical connector 20 is provided on the cylindrical connector 20 at right angles to the side. It is shown that the rear pin 28 is provided on the tubular connecting device 20 perpendicular to the vertical direction.

[0053] FIG. 15 is a front view, and the hatched area with diagonal lines at the top and bottom in the center represents a cross section of the tubular connector tube 21 of the tubular connector 20 in FIG. The left pin 28 on the inside of the tubular connector 20 is provided perpendicular to the vertical direction of the tubular connector 20. The right pin 28 is provided on the tubular connecting device 20 at right angles to the side,

[0054] The pendulum portion 71 of the pendulum portion 70 is integral with the hinge mechanism portion 80 of the pendulum portion 70 of claim 1 and is provided on the pins 28 on both sides so as to be hinged. The power transmission shaft mounting cylinder 53 and the pendulum part receiving device 75 are connected to the power transmission shaft 51 of the input shaft and the output shaft, which extend from the diagonal downward direction of 30 degrees on the left and right, and are stored in the sliding movement space 79 inside the sliding wall surface component 77 of the pendulum part receiving device 75. The sliding surface of the pendulum part 71 comes into contact with the sliding wall surface part 76 that constitutes the wide surface of the sliding space 79, and the sliding movement is performed while performing a hinge operation by the rotation of the power transmission. A separation prevention protrusion 73 for preventing separation when the power transmission shafts 51 are connected to each other is provided at the tip of the pendulum portion 71, and a separation prevention recess 74 is provided on the slide wall portion .

[0055] 16 and 17 show a shaft rod type connecting device 25, In the side view of FIG. 16, the central circular hatched area is the axial rod type connecting device shaft 26, and the pins 28 are provided horizontally and vertically perpendicular to the axial rod type connecting device shaft 26. The horizontal solid line pin 28 is on the near side, and the vertical dashed line pin 28 is on the far side. This indicates that the location is inside the rear side of the two axial rod type connecting device cup portions 27 which are fixed to a single axial rod type connecting device shaft portion 26 with their open portions facing outward.

[0056] FIG. 17 is a partial cross-sectional view of the front view of FIG. The cross-sectional view shows two shaft rod type connecting device cups 27 with their open ends facing outward at both ends of the central shaft rod type connecting device shaft portion 26, Pins 28 are provided on both ends of the shaft rod type connecting device shaft portion 26, This is an embodiment of a universal joint consisting of a pendulum portion 70 and a pendulum portion retainer 75 capable of hinge action according to claim 1, which are connected to power transmission shafts 51 extending from the pins 28 on both sides at an angle of 30 degrees downward.

[0057] The pendulum part 70, which is hingedly connected to the pin 28 of the shaft rod type connecting device shaft part 26, has a sliding movement space 79 on the inside of the tip side, and the pendulum part receiving device 75 is stored in the sliding movement space 79. The pendulum part receiving device 75 slides while performing a hinge action by rotation of the power transmission while both sides or one side of the pendulum part receiving device 75 contacts the slide wall part 76 constituting the wide surface of the slide movement space 79, A detachment prevention protrusion 73, which prevents detachment when the bending angle of the connection between the power transmission shafts 51 is changed or in the event of an accident, is provided at the tip of the pendulum part retainer 75, and a detachment prevention recess 74 is provided on the sliding wall portion 76 of the pendulum part 71.

[0058] FIG. 18 is a front view of the shaft rod type connector 25 similar to FIG. 17, and shows in cross section two shaft rod type connector cups 27 with their open ends facing outward near both ends of the shaft rod type connector shaft 26 in the central cross section. Pins 28 are provided on both ends of the shaft rod type connecting device shaft portion 26, This is an embodiment in which the joint parts 18 on both sides of the seesaw action joint yoke 10 of the curved rod type having the connecting parts 17 of Patent Document 1 are connected to pins 28 from the left and right.

[0059] The seesaw joint yoke 10 connected to the shaft rod type connecting device shaft portion 26 is The seesaw-type joint yoke 10 has a bearing 36 provided in a seesaw-type sliding wall component 41, and the joint 17 of the curved rod-type slidable joint 17 swings to alternately push out both joints 18 toward the pin 28 of the shaft rod-type connecting device shaft 26, thereby transmitting rotational power.

[0060] The power transmission shafts 51 extending from the diagonally lower sides on both sides and the seesaw joint yoke 10 fixed by the power transmission shaft mounting cylinders 53 are connected to the horizontal shaft rod type connecting device 25. This shows the state in which the joint yoke base 16 of the seesaw-type joint yoke 10 and the end portion of the shaft-rod type connecting device 25 are in contact with each other, indicating that the joint can only be formed at a bending angle of about 30°.

[0061] FIG. 19 is a side view of the tubular connector 20 similar to FIG. 14, but the pins 28 spaced apart and perpendicular to each other on the inside of the tubular connector 20 are all oriented vertically. FIG. 20 is a front view of FIG. 19, and the hatched area at the top and bottom shows a cross section of the tubular connecting device tube portion 21. As shown in FIG.

[0062] FIG. 21 shows the pins 28 on both sides of the cylindrical connecting device 20 in the vertical state shown in the front view of FIG. In this embodiment, the cylindrical connecting device 20 is connected to the joint portion 18 of the seesaw type joint yoke 10, which is made of the rod-type connecting portion 17 shown in FIG. 18, from the openings on both sides of the cylindrical connecting device 20. The seesaw joint yoke 10 includes a yoke base 16 including a power transmission shaft mounting cylinder 53 and a seesaw sliding wall component 41, The seesaw movement is made smooth by the bearing 36 in the slide wall surface component 41, and it is composed of a curved rod-shaped connecting part 17 with a joint part 18 on both ends.

[0063] FIG. 21 shows the state in which the joint yoke base 16 of the seesaw joint yoke 10 and the end portion of the tubular connecting device 20 are in contact, and indicates that the joint can only be formed at a bending angle of approximately 30°.

[0064] FIG. 22 shows that the cylindrical connector 20 shown in the front view of FIG. 20 and FIG. 21 is housed in an outer cylindrical portion 23 of the cylindrical connector, which houses the inner cylindrical connector 20 in a rotatable manner. This shows that a roller-type bearing 36 is provided between the tubular connector 20 and the outer tubular portion 23 of the tubular connector.

[0065] FIG. 23 shows the front view of the tubular connecting device 20 housed in the outer tubular portion 23 of the tubular connecting device shown in FIG. 22, from the openings on both sides. In the embodiment shown in the front view of FIG. 21, each of the seesaw-type joint yokes 10 is connected to two pins 28 of the cylindrical connecting device 20.

[0066] In this seesaw joint yoke 10, the portion that was the power transmission shaft mounting cylinder portion 53 is made into a double type seesaw yoke connecting portion 14, and a slide wall surface forming portion 41 that can freely move in a seesaw motion is provided on both ends of the double type seesaw yoke connecting portion 14. The double-type seesaw-type yoke 13 has a structure in which a connecting portion 17 having a joint portion 18 fixed to both ends is provided on both sides of the yoke 13. This double-type seesaw-type yoke 13 is designed to accommodate multiple units. FIG. 23 is an image showing that three double-type seesaw action yokes 13 and two cylindrical connecting devices 20 are connected to a power transmission shaft 51 on both sides.

[0067] FIG. 24 shows the embodiment of the multiple attachment shown in FIG. 23, in which the number of tubular attachments 20 housed in the multiple attachment tubular attachment outer tubular portion 23 is increased to four, and the multiple attachment tubular attachment outer tubular portion 23 is housed inside a coil spring 56 and a resin tube 57. Inside the non-rotating outer cylindrical part 23 of the cylindrical connector, the cylindrical connector 20 and the double seesaw type yoke 13 rotate to transmit power. This is an image diagram of the tire 55 at the bottom right of the figure, which can be freely changed in both vertical and horizontal directions, transmitting rotational power while undulating up, down, left and right.

[0068] FIG. 25 is a front view of an embodiment of the outer circumferential ring-mounted cross shaft 31 fixed to the chassis 54, which is the main body of claim 4. From the left and right of the central outer circumferential ring-mounted cross shaft 31, A seesaw-type joint yoke 10 that oscillates in a seesaw motion around a seesaw motion plate rotation fulcrum 43, which is a fulcrum, and is made of a plate-shaped member having a joint portion 18 that is connected to a hinge portion 40 from a connecting portion 17 made of a plate material, said joint portion 18 being connected to a cross shaft pin 30 and a joint, The cross shaft pin 30 is provided perpendicularly to the inside of a cross shaft-integrated inner ring 32, and the cross shaft-integrated inner ring 32 is further rotatably housed in an outer ring fitting 33 for an outer cross shaft-integrated ring, Like the power transmission shaft 51, it is fixed to the chassis 54 on the main body side, and is configured so that no non-uniform speed motion other than the rotation of the original power transmission occurs.

[0069] The seesaw joint yoke 10 on the right side is connected to the hinged joint part 18 on the cross shaft pin 30, the tip of which is shown in a horizontal position indicated by a circular hatching with diagonal lines in the center. The left seesaw joint yoke 10 is connected to the vertical cross shaft pin 30, The cross shaft built-in inner ring 32 and the power transmission shaft 51 are configured to rotate smoothly by their respective fixing metal fittings and roller-type bearings 36. [Industrial Applicability]

[0070] By using a connecting device with a similarly simple structure that suppresses the occurrence of uneven motion in a pendulum type universal joint that does not require the use of the cross axis of a Cardan joint, which is the main cause of uneven motion, it is possible to transmit stable rotational power even when multiple seesaw action joint yokes are connected in series to increase the bending angle, making it useful for industrial development as a set component of a highly reliable universal joint. [Explanation of symbols]

[0071] 10 Seesaw joint yoke 13 Double seesaw action yoke 14 Double type seesaw yoke connection part 17 Connection part 18 Joint 19 Multi-function device 20 Tube type orthosis 25 Axial rod type orthosis 26 Axle rod type connecting device shaft part 28-pin 30 Cross shaft pin 70 Pendulum Section 71 Pendulum part 75 Pendulum part retainer 80 Hinge mechanism 81 Hinge mechanism pin

Claims

1. At the universal joint, The tip of either the input shaft or the output shaft is made into a hinge mechanism, A pendulum portion is provided on the hinge mechanism portion so as to be hinged, The other power transmission shaft is provided with a pendulum part receiving device having a sliding wall surface portion that contacts both sides of the pendulum part and captures it so that it can slide freely, The pendulum portion can swing like a pendulum by hinge action from the hinge mechanism portion to the tip side, The pendulum part is slidably received by the slide wall part of the pendulum part receiving device, It is designed to transmit rotational power. Universal joint characterized by

2. In claim 1, The pendulum portion holder is provided on both the input shaft and the output shaft, The pendulum portion is provided as an independent part that is not fixed, The position where the center lines of the input shaft and the output shaft intersect is set as a base point of the center of the pendulum motion of the pendulum part, and the base point is set to a middle part of the pendulum part, The pendulum part has a middle portion in the shape of a rectangular prism, and the pendulum parts of the pendulum part are extended from both ends of the rectangular prism, Both sides of the pendulum portion on both sides are provided as sliding surfaces for contact surfaces for power transmission, The slide surfaces are on different sides of the input shaft and the output shaft, That is, the two opposing faces of the four faces extending from the pendulum part intermediate portion of the four-sided rectangular prism to the pendulum part are opposite faces on the input shaft side and the output shaft side, The pendulum part receiving devices provided on both the input shaft and the output shaft are also arranged so that the orientations of the slide wall parts are different by 90 degrees to face each other and each of the pendulum parts facing the own side can be received and retained. Universal joint characterized by

3. A connecting device for connecting universal joints provided on the power transmission shafts of the input shaft and the output shaft, Two pins, like the cross-shaft of a Cardan joint, which is formed by integrating two straight pins in a cross shape, are separated from each other and installed on the inside of a tube or on a shaft rod, with a gap between them on the rotation center line of the tube or shaft rod and perpendicular to the tube or shaft rod, The universal joint is connected to the nearest one of the pins from both sides of the rotation center line of the cylinder or shaft. A unique universal joint attachment.

4. A connecting device for connecting universal joints provided on the power transmission shafts of the input shaft and the output shaft, The cross shaft, which is made by crossing two pins of the Cardan joint, is fixed perpendicularly to the inside of the ring to form an inner ring with a built-in cross shaft. Further, an outer ring fitting for a ring with a built-in cross shaft is provided to rotatably accommodate the inner ring with a built-in cross shaft, and the outer ring fitting for a ring with a built-in cross shaft is fixed to a main body side such as a chassis. This is a universal joint device characterized by its

Images