JP7353611B1 - universal joint - Google Patents

Abstract

[Problem] To reduce obstacles caused by non-uniform movement of a cross shaft and to improve the convenience of a universal joint. [Solution] When an unnecessary operation occurs in the shaft rod 12 of the cross shaft 10 that tilts toward the joint yoke 15 side other than rotation for power transmission, the joint parts 18 on both sides integrated by the newly installed connecting part are On the other hand, the joint yoke 15 is configured so that it can alternately protrude toward the axis rod 12 like a seesaw at the seesaw rotation fulcrum of the joint yoke 15, thereby suppressing unnecessary movements with the structure of the joint yoke 15 that does not require tilting of the cross shaft 10. As an effect of bringing the cross shaft 10 closer to the original rotational state for power transmission, the joint yoke 15 of the seesaw type of the present invention and the power transmission shaft 39, which originally does not have tilting motion, can be directly connected without going through the cross shaft 10. I also made it possible to do joints. [Selection diagram] Figure 15

Description

The present invention relates to a joint yoke for a universal joint.

Conventionally, a universal joint can transmit rotational power even if the joint is bent at an angle rather than straight at the intersection of the input and output shafts of the power transmission shaft. Universal joints, also called cardan joints, have the problem of inconstant velocity motion, which can cause problems when rotating at high speeds.

Patent application 2022-016856 JP2003-194092 JP2002-227872

The problem of the present invention is that in the rotation of the power transmission force when the input shaft and the output shaft of the power transmission shaft are bent at a cross axis and jointed, It rotates while tilting toward the transmission shaft and rocking, but this tilt is thought to be one of the causes of the inconstant motion described above, so the challenge is to suppress this tilt. .

The process of sloping factors that poses the challenge is:
The cross shaft of a universal joint is one in which the input shaft and output shaft are bent and jointed, and the shaft rod of the cross shaft repeatedly tilts at an angle equal to the refraction angle.For example, if the joint between the power transmission shafts is 30 degrees. In the case where the power transmission shafts on both sides extend from below and intersect with the bending part at the apex, the inclination angle of the axis rod of the cross shaft when horizontally facing is 0 degrees, and the middle The two shaft rods repeat the action of tilting the shaft vertically from 0 degrees at the point by 15 degrees toward the power transmission shaft.
This is because the two shaft rods are jointed at the two joints at the tips on both sides of the bifurcated yoke, so when the joints on both sides of the fork are lined up horizontally, The joints on both sides are at the same horizontal position with an inclination of 0 degrees, and when the two-pronged joint is oriented vertically, the upper and lower sides of the joint that are vertically aligned on the center line of the inclined power transmission shaft are also inclined. The jointed shaft rod also tilts in the vertical direction on the center line of the power transmission shaft on the joint side.
In this way, when both ends of a joint yoke with a bifurcated end are lined up vertically with an inclination, the shaft rod will inevitably also be incline.
This operation is a reciprocation of the tilt from the first vertical orientation to the vertical orientation again, which is half a rotation of 180 degrees during the rotation of the shaft rod due to power transmission, so the 360-degree rotation of the power transmission shaft In one rotation, one shaft repeats the tilting motion of swinging back and forth twice, and the other shaft also tilts in the same way, so depending on the speed of rotation, the disk may flap. It looks like it is shaking.

In order to solve the above problems, the present invention employs the following means.
The joint part of the joint yoke that joins the shaft rod of the cross axis of the universal joint, which is made by bending the power transmission shafts together, becomes a cross when the joint parts at both ends of the fork are vertically oriented in the process ahead. The purpose is to suppress the tilting movement of the cross shaft by creating a structure that prevents the shaft rod of the shaft from tilting toward the joint yoke side of the joint portion, that is, toward the power transmission shaft side.

Claim 1 of the present invention provides, in a universal joint,
The tip of a joint yoke that is fixed and connected to the power transmission shaft for jointing with the shaft rod of the cross shaft, which is a universal joint that transmits rotational power by bending and jointing the power transmission shafts for transmitting rotational power. That is, the joint parts on both sides of the tip on the side in the direction of the power transmission axis of the bent and connected partner are not fixed to the joint yoke, but the joint parts on both sides are connected and integrated. A connecting part is separately provided and connected and fixed, and the joint parts on both sides, which are integrated with the connecting part, alternately protrude and tilt toward the other side's power transmission shaft like a seesaw. The power transmission shaft on the other side can be moved freely on the joint yoke, and the joint parts on both sides that are integrated with the connecting part can be tilted like a seesaw from the joint yoke. A universal joint characterized in that it can be directly joined without intervening the cross shaft of the universal joint.

This is because the shaft rod 12 of the cross shaft 10 is rotated by the rotational power of the power transmission shaft 39, and the two shaft rods 12 of the cross shaft 10 are connected to each other on both sides in the direction of the power transmission shaft 39. The joined joint portion 18 is designed to be able to tilt from the joint yoke 15 toward the axis rod 12 so that the joint portion 18 can be tilted away from the joint yoke 15 toward the axis rod 12 so that the joint portion 18 can remain in a position that maintains a constant posture without tilting even when the body is tilted. By doing so, the cross shaft 10 can remain and rotate without tilting at the intermediate position between the angles at which the two power transmission shafts 39 are bent or at the right angle position on the center line of the output shaft which is the power transmission destination. The purpose is to suppress the tilting and rocking motion, which is a cause of instability, and to allow only the original rotation of rotational power transmission.

The fact that rotational power can be transmitted without tilting the cross shaft 10 means that the rotational power can be transmitted to the power transmission shaft 39 or to the gears, propellers, etc. to which rotational power is transmitted, without using the universal joint called the cross shaft 10. By providing the shaft rod 12 that can be joined to an object, it is also possible to directly connect the rotating object to the joint yoke of the present invention.

Further, in the seesaw type joint portion 18 provided to maintain a position in which the cross shaft 10 does not tilt, the joint portions 18 on both sides are connected by a connecting portion made of a connecting member of either a plate material or a bar material. As a fixed integral part, there are two types of connecting members: a plate connecting type seesaw type joint part 20 and a bar connecting type seesaw type joint part 40, and there are two types of connecting members corresponding to each of the two types of connecting members. The seesaw type joint part is provided on the joint yoke 15 so as to be freely movable in a tilting manner such that it alternately protrudes and tilts like a seesaw to transmit rotational power.

As a method of providing this seesaw type joint part on the joint yoke,
First, in the plate articulating seesaw type joint part 20, the plate articulating seesaw type joint part 20 is used as the yoke base 16A of the joint yoke 15 which is provided so as to be tiltable, and the power transmission shaft 39 provided in the yoke base 16A is accommodated. A two-pronged sliding wall surface forming part 33 that slidably sandwiches the plate-connected seesaw joint part 20 is provided on the opposite side of the power transmission shaft mounting cylinder part 35 to be fixed. The joint part 20 is slidably movable in the slide space 34 between the two prongs, and is sandwiched between the slide wall structure parts 33 on both sides, so that rotational power can be transmitted from the power transmission shaft 39. As for the overall image, the tip of the slide wall forming part 33 that is bifurcated from the circular part is located on the opposite side of the circular part of the yoke base 16A provided with the cylinder of the power transmission shaft mounting cylinder part 35. It has a tapered shape and has a conical shape as a whole, and the vicinity of the two-pronged tip of the conical shape is used as a rotational fulcrum for the seesaw movement of the plate-joint seesaw type joint part 20. The joint part 20 is shaped like a wing with a wide front and back, and the joint part 18 is provided on two sides at both ends of the wide wing, and the tip side of the middle part of the two ends of the wing-like part is rotated in a seesaw action. As a fulcrum , the wide surface on the side of the power transmission shaft mounting cylinder portion 35 which is the rear side of the rotational fulcrum is stored in the slide space 34 between the slide wall structure portions 33, and the storage portion is It is configured to be a rotational power transmission point from a power transmission shaft 39.

Next, the bar connecting type seesaw type joint part 40 is a round bar or square bar made into a semicircular inverted arm shape, and joint parts 18 are provided at both ends of the tip of the semicircle. The overall image of the yoke base 16B of the joint yoke 15, in which the joint part 40 is provided so as to be tiltable like a seesaw, is as follows: A rod whose surface side is shaped like a cone with its tip tapered from the circular portion, and a bar-connected seesaw type joint portion 40 shaped like a semicircular inverted arm is slidably passed through the cone shape. A bar material sliding storage hole 42 is provided, and both ends of the bar connecting type seesaw type joint section 40 stored in the bar material sliding storage hole 42 are inclined in the direction of the conical tip, that is, like a seesaw in which both ends are inclined. The fixed and connected power transmission shaft 39 on its own side alternately expands and contracts in the direction above the center line to form a ring, and the semicircle of the bar-connected seesaw type joint part 40 Approximately half of the length of the joint rod 41 of the joint section is stored in a storage hole 42 that allows the rod to slide freely, and this storage portion serves as a rotational power transmission point from the power transmission shaft 39. The configuration is as follows.

Claim 2 of the present invention is:
In claim 1, the connecting portion alternately protrudes and tilts toward the power transmission shaft of the partner side like a seesaw, toward the tip side facing the power transmission shaft of the partner side, and further toward the power transmission shaft side of the partner side. What is claimed is: 1. A universal joint comprising: a hinge-operating section that can be freely hinged; and the joint section is fixedly provided at both ends of the distal end side of the hinge-operating section or at one intermediate position.

This is because the joint portions 18 of the joint yoke 15 of the present invention can alternately protrude and tilt toward the other party's power transmission shaft 39 like a seesaw, and also have a hinge action provided at the tip side. By providing the joint part 18 in the part 24, the lateral position on the center line of the rotational center point of the cross shaft 10 or the power transmission shaft 39 to which the rotational movement is transmitted can be set as the rotational fulcrum of the seesaw action of the tip of the joint yoke 15. By being able to do so, it is possible to smooth the rotational power transmission in conjunction with the seesaw inclination, and to make the joint part 18 provided in the hinge operating part 24 one piece at the intermediate position of the hinge operating part, so that the power transmission shaft 39 of the other side can be made smooth. If it is installed sideways, it can be easily joined to the tip side of the other party's power transmission shaft 39, like the chuck function type joint section at the tip of an electric screwdriver, and the joint section 18 are provided at both ends of the joint yoke 15, the joint yoke 15 is rotatably jointed with the shaft rod 12, but the joint portion 18 is made into one piece and is provided facing the other side of the power transmission shaft 39. In this case, the tip of the shaft rod 12 of the power transmission shaft 39 is accommodated and fixed to form a joint.

Claim 3 of the present invention is:
In claim 1 or in a cross shaft of a universal joint, the center lines of the shaft rods at the center position of the cross shaft where the two shaft rods forming the cross of the cross shaft intersect do not intersect at the same point. are provided so as to intersect with each other at an arbitrary interval, and the shaft rod slides in a joint portion of a joint yoke jointed with the shaft rod, and the shaft rod is connected to the shaft in the direction of the power transmission axis and the shaft. A universal joint that is characterized by being able to slide in the longitudinal direction of the rod.

This is the position where the shaft rods 12 of the cross shaft 10 intersect in a criss-cross pattern, and the center lines of the shaft rods 12 do not intersect at one point, but are shifted and intersected. Rotation fulcrums on the power transmission shaft 39 side are lined up on both sides of the center of rotation of the power transmission shaft 39, and the fulcrums provided on both sides are fixed in position so as to rotate integrally with the power transmission shaft 39. Therefore, depending on the width of the future shifting interval, there is an effect of further suppressing the tilting movement of the cross shaft 10 during rotation or preventing it from tilting.

In addition, when the center lines of the two shaft rods 12 are shifted and intersected, both sides of the joint yoke 15 bent at an angle from the cross shaft 10 are further extended from the rotational fulcrum of the seesaw operation at the end of the joint yoke 15. In the configuration in which the joint portion 18 is extended, the shaft rod 12 needs to slide at the joint portion 18 when the shaft rod 12 is oriented vertically in a process in which the shaft rod 12 is inclined. The cross shaft 10 itself rotates with the rotational force of the power transmission, maintains its structure, and rotates smoothly. This allows the shaft rod 12 to slide in the longitudinal direction from the joint portion 18 and tilt toward the joint yoke 15, which is a second feature even in conventional cross-shaft type universal joints. This can be used for a cross shaft 10 in which the center lines of the book shaft rods 12 are shifted and intersected.

As an effect of the joint yoke using the seesaw operation method of the present invention,
The cross shaft of the universal joint is capable of suppressing the movement of the cross shaft, which is a cause of instability caused by tilting and swinging, which is other than the original rotation transmitted from the power transmission shaft connected to the cross shaft of the universal joint.
By providing a shaft rod for the joint at the rotational power transmission destination of gears, propellers, etc., direct jointing with the joint yoke of the present invention is possible without using a cross shaft universal joint.
By arranging the two shaft rods of the cross shaft so that they do not intersect at the same point, but at an arbitrary interval, the movement of the cross shaft tilting and swinging can be further suppressed. did.

2 is a plan view of the outer circumferential ring-mounted cross shaft 13. FIG. is a front view of FIG. 1; 1 is a plan view showing a seesaw joint portion 20 of a plate-connecting type provided at the tip of a joint yoke 15. FIG. is a front view of FIG. 3. is a side view of FIG. 4; 1 is a plan view showing the yoke base 16A side of the joint yoke 15 to which the plate connecting type seesaw type joint portion 20 of FIGS. 3 to 5 is attached. is a front view of FIG. 6. is a side view of FIG. 7; is a bottom view of FIG. 8; 6 is a front view of the plate connecting seesaw type joint portion 20 of FIGS. 3 to 5 attached to the yoke base 16A of the joint yoke 15 of FIGS. 6 to 9. FIG. is a side view of FIG. 10; 1 is a front view of the embodiment, in which a joint yoke 15 is attached to the two shaft rods 12 of the cross shaft 13 installed on the outer ring part of FIGS. This is an image of them being jointed. 4 is a front view of a seesaw-type joint part 20α of the plate-connecting type provided at the tip of the joint yoke 15 as in FIG. A hole for passing the hinge rotation shaft 26 is provided inside the longitudinal side to form a hinge rotation shaft storage cylindrical portion 25. 13 is a perspective view of an embodiment. On the right side, a joint yoke 15 provided with a plate type seesaw type joint portion 20α in which the joint portions 18 on both ends of FIG. It is an image diagram in which rotational power is transmitted by directly jointing the shaft rod 12 provided at the tip of the power transmission shaft 39. 14 is an embodiment shown in a perspective view, in which a chuck-type joint part extending from the middle part of a hinge rotation base 36 provided at the tip of a plate-type seesaw-type joint part 20α with the same hinge movement as in FIG. 28 is an image diagram showing that the shaft 28 is directly jointed with a power transmission shaft 39 on the other side. 1 is a plan view showing a bar connecting type seesaw type joint part 40 provided at the tip of the joint yoke 15, and joint parts 18 that are jointed with the shaft rod 12 of the cross shaft 10 on both sides. is a front view of FIG. 16, showing that the joint connecting rod 41 is of a semicircular inverted arm type. is a side view of FIG. 17; is a plan view showing the yoke base 16B side of the joint yoke 15 to which the bar arm type seesaw type joint portion 40 of FIGS. 16 to 18 is attached. is a front view of FIG. 19. is a side view of FIG. 20. 1 is a front view of the embodiment, in which a joint yoke 15 is attached to the two shaft rods 12 of the cross shaft 13 installed on the outer ring part of FIGS. This is an image of the joints. 19 is a front view of the yoke base 16B of the joint yoke 15 shown in FIGS. 19 to 21, and there is a bar sliding storage hole 42 that slidably stores a reverse arm type bar connecting seesaw type joint part 40. are provided at two positions, upper and lower at right angles, in alignment with the two shaft rods 12 of the cross shaft 10. 22 is a perspective view, which is an embodiment similar to FIG. 22, but shows two connected bars that are slidably stored in a yoke base 16B that has the slide-slide storage holes 42 of FIG. It is an image diagram in which a seesaw type joint part 40 is directly jointed to a shaft rod 12 provided in a cross shape at the tip of a power transmission shaft 39 on the output side to transmit rotational power.

In claim 1 of the present invention,
When the input shaft and output shaft of the power transmission shaft 39 are bent and jointed with a cross shaft type universal joint, the original rotation for rotary power transmission and the power transmission on the side where the cross shaft 10 is jointed respectively An unnecessary movement of tilting and swinging in the direction of the axis 39 occurs, and in order to suppress this unnecessary movement,
First, instead of fixing the joint parts 18 to the ends of both sides of the joint yoke 15, connecting parts that integrate the joint parts 18 on both sides are separately provided, connecting and fixing them, and then connecting the joint parts 18 from the joint yoke 15. The joint parts 18 on both sides alternately protrude and tilt toward the other side's power transmission shaft 39 like a seesaw, without attracting the shaft rod 12, but on the contrary, tilting so as to lean closer to each other, and both transmit power. The joint yoke 15 is provided so as to be able to see-saw freely so as to transmit the rotation and suppress the inclination of the shaft rod 12.

Further, a shaft rod 12 like a cross shaft 10 is provided at the tip of the power transmission shaft 39 on the other side where the swinging motion does not occur, and the joint portion 18 of the joint yoke 15 is directly jointed to the shaft rod 12. It can also be used as a power transmission destination.

In claim 2 of the present invention,
A hinge operating portion 24 is provided so as to be able to freely hinge on the side of the connecting portion that can freely see-saw, facing the power transmission shaft 39 on the other side, and further toward the power transmission shaft 39 on the other side. The joint portion 18 is fixedly provided at one location on the center line of the power transmission shaft 39 on the self side of the hinge operating portion 24 that rotates circumferentially around the hinge rotation shaft 26 or at an intermediate position. By this, in addition to the action of tilting like a seesaw toward the power transmission shaft 39 side of the other party facing each other at the bending angle, we added the action of facing always on the line of the same center point as the center of rotation of the other party due to the hinge configuration. , rotational power transmission at the bending portion can be made smooth.

In claim 3 of the present invention,
The cross shaft 10 is rotated by setting the position where the two shaft rods 12 of the cross shaft 10 intersect so that the center lines of the shaft rods 12 do not intersect at the same point but are separated by an arbitrary interval. The rotary power transmission fulcrums fixed in position by the joint yoke 15 are arranged on both sides of the original center of rotation, and the effect of suppressing the tilting movement when the cross shaft 10 rotates is produced.

However, since the cross shaft 10 rotates around the original center of rotation, when the rotary power transmission fulcrum is not at a lateral position to the center of rotation, but at a diagonal lateral position at a bending angle with the joint yoke 15. In the case of a conventional joint yoke 15 that is not a seesaw type, the cross shaft 10 needs to move from the position of the rotary power transmission fulcrum during rotation, so the joint yoke jointed with the shaft 12 of the cross shaft 10 is 15, the shaft rod 12 of the cross shaft 10 slides and moves in the input shaft or output shaft side direction of the power transmission shaft 39 and in the longitudinal direction of the shaft rod 12, This makes it possible to cover the gap with the center of rotation.

1 and 2 show a universal joint of a cross shaft 13 installed on the outer circumferential ring part, in which the shaft rod 12 of the cross shaft 10 is provided inside the outer circumferential ring part 14 of the cross shaft. FIG. 1 is a plan view, and FIG. It is shown that the horizontal horizontal shaft rod 12 inside the outer circumferential ring portion 14 is provided at the front position, and the vertical shaft rod 12 is provided at the rear side position.

FIG. 2 is a cross-sectional view of the side view of FIG. 1, in which the upper and lower hatched areas represent the cross section of the cross-shaft outer circumferential ring part 14, with the shaft rod 12 on the vertical side being on the left side, and the horizontal side on the horizontal side being on the left side. The shaft rod 12 is oriented toward the right side, and the shaft rod 12 is provided at a position shifted to the left and right from the center line between the upper and lower sides, which is the original center of rotation of the outer circumferential ring-mounted cross shaft 13. This means that when the cross shaft 10 rotates due to rotational power transmission, the center point of rotation of the cross shaft 10 and the joint fulcrum of the joint yoke 15 are not at the same point, but are spaced apart from each other. This is because the line connecting the midpoints of the cross shafts 10 on both sides serves as the center line of rotation to suppress rocking due to inclination.

In the cross shaft 10 shown in FIGS. 1 and 2 that suppresses the tilting rocking motion, the shaft rod 12 of the cross shaft 10, which is jointed to the conventional joint yokes 15 that fix the joint parts 15 at both ends, is powered When the transmission rotates, the joint yoke according to claims 1 to 3 of the present invention cannot be used because it bends and is sequentially drawn toward the opposite sides of the power transmission shaft 39, causing a tilting action. It can be used in 15.

3 to 5 show a seesaw type joint section 20 that connects plate materials, and FIG. 3 is a plan view showing the thickness of the joint section connecting plate material 21 that connects and fixes the joint sections 18 on both ends. The two vertical broken lines in the middle of the joint connecting plate 21 indicate the seesaw rotation fulcrum pin insertion hole 22.

FIG. 4 is a front view of FIG. 3, in which a seesaw rotation fulcrum pin insertion hole 22 is provided at the tip of the upper center of the wide side of the central inverted triangular joint connecting plate 21, and the joint connecting plate 21 is provided at both ends. 18 are fixedly provided.

FIG. 5 is a side view of FIG. 4, in which the thickness of the joint connecting plate 21 is shown at the bottom, the joint 18 is shown at the top, and the shaft insertion hole 23 of the joint 18 is shown. It means that it is vertically long and oval, and when a round rod-shaped shaft 12 is housed, the shaft 12 can be slid up and down in the joint part 18, and the bottom A seesaw rotation fulcrum pin insertion hole 22 is shown by a broken line on the side.

6 to 9 show a yoke base 16A, with a seesaw rotation fulcrum pin 32 attached and fixed to the upper tip side, and a plate connecting type seesaw type joint part 20 of FIGS. 3 to 5 being connected on both sides like a seesaw. The portions 18 are alternately fastened vertically and rotatably to form an integrated joint yoke 15. FIG. 6 is a plan view showing the vertical faces on both sides of the slide space 34 in the center and the opposing left and right halves. The circular part is the slide wall structure part 33, and represents that the seesaw rotation fulcrum pin 32 is passed horizontally through the middle part of the slide space 34 vertically between the slide wall structure parts 33. .

FIG. 7 is a front view of FIG. 6, in which the lower side is the power transmission shaft mounting cylinder part 35, the upper side of the yoke base 16A is the slide wall structure part 33 on both sides, and the seesaw rotation fulcrum is on the upper side of the sliding space 34 in between. This shows that the pin 32 is passed through horizontally, and the seesaw rotation fulcrum pin 32 can be attached and detached.

FIG. 8 is a side view of FIG. 7, and shows a seesaw rotation fulcrum pin 32 on the top end side of the triangular pyramid-shaped yoke base 16A.

FIG. 9 is a bottom view of FIG. 8, where the inner double-circled part is the power transmission shaft mounting cylinder part 35, the outer part is the yoke base 16A, and the center part is the bottom surface of the yoke base 16A.

FIG. 10 is a front view, in which a seesaw type joint yoke 15 is completed by fixing the plate connecting type seesaw type joint part 20 to the yoke base 16A with a seesaw rotation fulcrum pin 32 so that it can freely rotate. , a diagram of a configuration in which the wide side of the joint part connecting plate material 21 in FIG. 4 is spread laterally and joint parts 18 are provided at both ends, and a diagram in FIG. 8 of a configuration consisting of a triangular pyramid-shaped yoke base 16A, When the yoke base 16A is rotated by power transmission, the joint connecting plate 21 of the plate connecting seesaw type joint unit 20, which is sandwiched and housed by the slide wall forming parts 33 on both sides, is slid within the slide space 34. It rotates for power transmission.

FIG. 11 is a side view of FIG. 10, showing that the joint connecting plate 21 is housed in the slide space 34 between the slide wall components 33 of the yoke base 16A so as to be slidable, and is used for power transmission. It is shown that the yoke base 16A and the plate-connected seesaw type joint part 20 can rotate together as a seesaw type joint yoke 15 by the rotation of the power transmission shaft 39 fixedly attached to the shaft mounting cylinder part 35. There is.

FIG. 12 shows an embodiment, in which seesaw type joint yokes 15 are joined to the shaft rod 12 of the central cross shaft 13 installed on the outer circumferential ring part from diagonally below on the left and right sides by respective plate connecting type seesaw type joint parts 20. This image shows that the seesaw-type joint yoke 15 of FIGS. 10 and 11 is connected to the outer ring-mounted cross shaft 13 of FIG. 2, and the left and right plate-connected seesaw-type joint The position of the seesaw rotation fulcrum pin 32, which is the fulcrum position of the seesaw rotation of the part 20, is diagonally downward in the direction of each power transmission shaft 39 from the rotation center position of the central part where the shaft rods 12 intersect in a criss-cross pattern. The joint parts 18 on both sides of the right joint yoke 15 are horizontally aligned and are connected to the upper left shaft rod 12 from the position of the seesaw rotation fulcrum pin 32, but the joint parts 18 on both sides of the right joint yoke 15 are jointed to the shaft rod 12 on the upper left from the position of the seesaw rotation fulcrum pin 32. The upper and lower joint parts 18 of the yoke 15 have an intermediate position between the upper and lower sides of the joint part 18 at the same lateral position as the position of the seesaw rotation fulcrum pin 32, so that the position of the rotation fulcrum pin 32 is the center point position. This indicates that the shaft rod 12 is sliding downward from the intermediate position within the joint portion 18 at an interval between the upper and lower sides diagonally downward.

This shaft rod 12 on the vertical side transmits rotational power from the joint portion 18 at a position lower than the intermediate position which is the center of rotation of the shaft rod 12, and depending on the rotation speed, It is predicted that the rotation will be disturbed due to the timing shift of the slide movement, and it is also possible that a tilting force will be applied to the power transmission shaft 39 side on the joint side, and when the tilting force is applied, the oval shape of the joint part 18 This can be accommodated by the space inside the shaft rod receiving hole 23 of the joint part and the sliding movement of the shaft rod 12 in the longitudinal direction.

In addition, in order to eliminate sliding movement of the shaft rod 12 in the longitudinal direction, the wide surface of the joint connecting plate material 21 is adjusted so that the intermediate position of the shaft rod 12 and the position of the seesaw rotation fulcrum pin 32 are at the same lateral position. A seesaw rotation fulcrum pin insertion hole 22 is provided in a convex portion that protrudes from the top center toward the tip side, and the position of the seesaw rotation fulcrum pin insertion hole 22 is set at the same height as the middle part of the joint portions 18 on both ends. However, in this case, it is necessary to hollow out the central portion, which is the center of rotation of the cross shaft 10, so that the protruding portion can be received in the central portion.

FIG. 13 is a front view of the plate articulating seesaw type joint part 20α, showing the upper side of the wide side provided in place of the seesaw rotation fulcrum pin insertion hole 22 of the plate articulating seesaw type joint part 20 in FIG. The tip is provided as a hinge rotation shaft storage cylinder part 25 with a hole through which the rotation shaft passes, and a joint part fixing base 27 and a joint part 18 are fixed to the hinge rotation shaft storage cylinder part 25 at both ends. By providing the hinge rotation shaft 26 through the provided hinge rotation shaft 26, in addition to the seesaw rotation of the plate-connected seesaw type joint section 20, the hinge movement of the joint sections 18 on both sides ensures that the tip side of the joint section 18 is always on the power transmission destination side. By making it face up, the fulcrum position of the seesaw rotation of the plate connecting type seesaw type joint part 20α can be set at the lateral position on the center line of the rotation center point of the cross shaft 10. It is something.

FIG. 14 shows an embodiment, in which the joint connecting plate material is the fulcrum position of the seesaw rotation on the tip side of the yoke base 16A of the joint yoke 15 in which the power transmission shaft 39 on the diagonally lower right side is connected by the power transmission shaft mounting cylinder part 35. Slide the retaining pin 31 for the seesaw rotation fulcrum recess into the seesaw rotation fulcrum recess 30 provided on both upper and lower sides of the middle point on the wide side of the hinge rotation shaft housing cylinder part 25 on the distal end side of the yoke base 16A. A seesaw-type joint part 20α of the plate-connecting type seesaw type joint part 20α is inserted from the bifurcated upper and lower sliding wall forming parts 33 constituting the space 34 and fixed so as to be rotatable as a seesaw. A hinge rotating shaft 26 is rotatably inserted into the joint, and the joint portions 18 fixedly provided on both sides of the hinge rotating shaft 26 can be connected to the other side without going through the cross shaft 10 of the universal joint. This is an image of the shaft rod mounting portion 38 of the power transmission shaft 39 being directly jointed to the shaft rod 12. The joint portions 18 on both sides jointed to the shaft rod 12 can be freely hinged from the hinge rotating shaft housing cylinder portion 25. Since it always moves in the direction of the left power transmission shaft 39 through a hinge operation, together with the seesaw inclination of the joint connecting plate 21, the rotational power transmission is smoothed.

FIG. 15 shows an embodiment, in which a hinge rotating shaft storage is provided at the tip of a joint connecting plate 21 provided at the left tip of a seesaw type joint yoke 15 provided with a seesaw type joint 20α on the diagonally lower right side. A hinge rotation base 36 is fixed to a hinge rotation shaft 26 housed in a cylindrical portion 25, and is provided with a chuck type joint part 28 and a chuck type joint part fixing shaft 29 facing in the left horizontal direction. Each part from the hinge rotating shaft 26 to the chuck type joint part 28 is integral, and can be hinged integrally from the hinge rotating shaft housing cylinder part 25, and the chuck type joint part 28 is connected to the power of the other party. It is an image diagram showing a state in which the transmission shaft 39 is housed and fixed by a chuck function.

16 to 18 show a seesaw type joint section 40 that connects bars, and FIG. 16 is a plan view of a round bar type joint section connecting bar 41 that connects and fixes the joint sections 18 on both ends. The thickness of the round bar is shown.

FIG. 17 is a front view of FIG. 16, and it can be seen that the round bar type joint connecting rod 41 has an inverted arch shape that traces the edge of a semicircle on the lower side of the joint section 18 on both ends of the upper part. The center of the both-side joint parts 18, which are fixed and integral with the joint part connecting rod 41, is provided so as to be on the diameter line that bisects the circle, which is the completed position of the semicircle.

FIG. 18 is a side view of FIG. 17, showing a round joint shaft rod receiving hole 23 in the upper joint section 18 through which the shaft rod 12 is passed.

19 to 21 show a yoke base 16B, and inside the yoke base 16B, a round bar type joint connecting rod 41 of FIGS. 16 to 18 is curved into an inverted arch shape to allow free sliding movement. FIG. 19 is a plan view showing the round opening of the bar slide movable storage hole 42 that penetrates between the left and right sides of the circular yoke base 16B. Since the central portion of the yoke base 16B has a tapered conical shape, the opening appears vertically long, and the dashed line indicates that the bar slide movable storage hole 42 is connected inside.

FIG. 20 is a front view of FIG. 19, showing that the yoke base 16B has a conical shape, and the housing hole 42 for freely sliding the bar material is shown in broken lines, and the yoke base 16B is rotated by power transmission. Sometimes, the rotation of the power transmission is carried out while sliding the joint part connecting bar 41 of the bar connecting type seesaw type joint part 40 which is fitted and stored in the bar sliding freely storage hole 42.

FIG. 21 is a side view of FIG. 20, with the power transmission shaft mounting cylinder portion 35 on the lower side.

FIG. 22 shows an embodiment, in which the inner side of the central cross shaft 13 installed on the outer circumferential ring is indicated by a broken line, and the shaft rod 12 has a seesaw-type joint yoke 15 from diagonally below on the left and right sides connecting the respective rods. This is an image of a seesaw type joint 40, showing a semi-circular, inverted arch-shaped joint that is slidably inserted into a storage hole 42 in which the rod can be slid freely in the yoke base 16B.The joint at the tip of the connecting rod 41. 18 represents that it is jointed to the shaft rod 12, and the joint portions 18 arranged vertically on the right side are connected to the joint rod material 41 on the connecting side of the upper joint portion 18 like a seesaw. One side of the seesaw looms large, indicating that the vertical position of the cross shaft 13 installed on the outer ring is maintained, and the bar-connected seesaw type joint 40 forms a semicircle. Since it has a completed shape, even if the rod-connected seesaw type joint part 40 rotates while tilting alternately like a seesaw due to the rotational power of the power transmission shaft 39, both sides, which is the center position of the semicircle, The middle of the joint portion 18 does not change on the center line of the connected right power transmission shaft 39, and the shaft rod 12 does not slide within the joint portion 18, or almost never occurs. .

FIG. 23 is a front view showing that the bar material sliding movable storage holes 42 are provided in the conical yoke base 16B at two locations, upper and lower, overlapping each other at right angles like a cross.

FIG. 24 shows an embodiment in which the rod storage holes 42 shown in FIG. 23 are connected to a conical yoke base 16B that is provided in two places, upper and lower, overlapping each other at right angles like a cross. A joint yoke 15 provided with a seesaw type joint part 40 that is slidably movable extends from the lower right side to the left horizontal direction without going through the universal joint of the cross shaft 10. It is an image diagram showing a state in which it is directly jointed to a shaft rod 12 like a cross shaft 10 provided in.

Instead of the conventional method of pulling and tilting the shaft rod 12 of the cross shaft 10 jointed by the joint yoke 15, on the contrary, the seesaw method is used in which the joint parts 18 on both sides are alternately tilted from the joint yoke 15 like a seesaw. By making the cross shaft 10 of the universal joint rotate together with the shaft rod 12 so that it leans close to the shaft rod 12, and by making the cross shaft 10 of the universal joint capable of suppressing its own tilting, it is possible to rotate only the original rotation of power transmission, thereby improving the appearance. In addition to being able to rotate smoothly as if in a stationary state, and in addition to the see-saw type joint that tilts so as to be close to the other party, it is also possible to always face the same center line direction on the same rotational center line as the power transmission destination. A joint part 18 is provided on the tip side of the hinge mechanism so that it can be directly and easily joined to the other party's power transmission shaft 39, and the cross shaft 10 and the other party's joint yoke 15 can also be omitted, simplifying the design. Its stability means that it can be used in a wider range of applications, contributing to the development of industry.

10 cross shaft 12 shaft rod 13 outer ring installed cross shaft
14 Cross shaft outer ring part
15 Joint yoke
16A Yoke base (for plate connecting seesaw type joint)
16B Yoke base (for bar connecting type seesaw type joint)
18 Joint part 20 Plate connecting type seesaw type joint part 20α Plate connecting type seesaw type joint part (joint part hinge rotation type)
39 Power transmission shaft 40 Bar connecting type seesaw type joint part

Claims (3)

In the universal joint,
A joint yoke jointed to one power transmission shaft consists of a pair of joint parts, a connecting part, and a yoke base.
Power is transmitted between the other power transmission shaft and one power transmission shaft through or without the cross shaft which is a universal joint,
The pair of joint portions are fixed to a shaft rod of the cross shaft or a shaft rod fixed to the other power transmission shaft perpendicularly to the power transmission shaft,
The yoke base is jointed to the one power transmission shaft and includes a slidable space that can accommodate a part of the connecting portion,
The connecting portion is fixed to the pair of joint portions, a portion thereof is housed in the slidably movable space, and an intermediate position between the pair of joint portions is connected to the yoke base via a fulcrum pin or a fastener. By being connected to the yoke base, the
Alternatively, the connecting portion fixed to the pair of joint portions is shaped like a semicircularly curved rod, and
A part of the connecting part is placed at a position of the yoke base on a circumferential line of rotation of the pair of joint parts about the center point, with the center point being an intermediate position on the line connecting the pair of joint parts. A universal joint , characterized in that the universal joint is swingable relative to the yoke base by providing the slidably movable space that accommodates the space and allows reciprocating movement in the circumferential direction. In the universal joint,
The joint yoke that is jointed to one power transmission shaft consists of a connecting part and a yoke base.
A hinge operation part is provided on the member jointed to the other power transmission shaft,
The yoke base is jointed to the one power transmission shaft and includes a slidable space that can accommodate a part of the connecting portion,
The connecting portion includes a hinge rotation shaft, a portion of which is housed in the slidably movable space, and an axially intermediate position of the hinge rotation shaft is connected to the yoke base via a fulcrum pin or a fastener. By this, it is swingable with respect to the yoke base,
A universal joint characterized in that the hinge operating portion is provided with a pair of joint portions, and the pair of joint portions and the hinge rotation shaft are connected . In the universal joint,
The joint yoke that is jointed to one power transmission shaft consists of a joint part, a hinge operation part, a connecting part, and a yoke base.
The other power transmission shaft is provided with a member to which an end is fixed,
The yoke base is jointed to the one power transmission shaft and includes a slidable space that can accommodate a part of the connecting portion,
The connecting portion includes a hinge rotating shaft connected to the hinge operating portion, a portion of which is housed in the slidably movable space, and an axially intermediate position of the hinge rotating shaft is located between the yoke base and the fulcrum pin. Or, by being connected via a fastener, it is swingable relative to the yoke base;
A joint portion is provided at an intermediate position in the hinge rotation axis direction of the hinge operating portion toward the other power transmission shaft,
A universal joint characterized in that the member to which the end of the other power transmission shaft is fixed and the joint portion are fixed non-rotatably .

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