JP2566238Y2 - Joint - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint, and more particularly, to a joint improved as a turning pair used for a link mechanism or the like which can rotate with each other via a pin.

[0002]

2. Description of the Related Art Conventionally, a coupling as a pair has a structure used for, for example, a link mechanism that can rotate with respect to each other via a pin. It is known that a plate or the like as a power transmission member is rotatably connected to a fork via a pin, and the plate is rotated by movement of a shaft.

[0003]

However, in the above-mentioned conventional joint, the precision between the pin and the plate as the power transmission member is reduced between the pin and the fork screwed to the shaft as the power transmission member. Tolerances occur. Due to this tolerance, backlash occurs between the shaft and the plate, and the transmission of the force is not performed accurately, and there is a problem that it is difficult to ensure the positional accuracy between the two.

An object of the present invention is to provide a joint which eliminates a gap in a connecting portion of a joint which is a pair of turns used in a link mechanism or the like, and which transmits accurate force and improves positional accuracy.

[0005]

SUMMARY OF THE INVENTION In view of the above-mentioned conventional problems, the present invention disposes a power transmission member in a fork fixed to a distal end portion of a power transmission member, and includes the fork and the power transmission member. In the joint formed by connecting the fork and the driven power transmitting member via a pin that penetrates, a gap between the fork and the pin and the pin and the driven power transmitting member are provided between the power transmitting member and the driven power transmitting member. In order to simultaneously remove the gap between the power transmission member and the power transmission member, a pressing member for pressing the power transmission member in a direction away from the power transmission member is provided, and the pressing member is pressed toward the power transmission member. An elastic member for biasing is provided, and an inclined surface is provided on the opposite side of the pin where the fork and the pin are in close contact with each other by the action of the pressing member, and between the inclined surface and the fork, It is made by placing a wedge for filling the gap between the emission and the fork.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings.

As a first reference example, referring to FIGS. 1 and 2, a joint 1 is used for a link mechanism or the like, for example.
Basically, a fork 7 screwed to the tip of a shaft, for example, a power transmission member 3 by a screw 5, and a plate, for example, a power transmission member 11 on the fork 7 via a pin 9, rotate freely. It is installed.

A hole 13 is formed at the tip (upper portion in FIGS. 1 and 2) of the power transmission member 3 and a leg 17 of a tack-shaped pressing member 15 is inserted into the hole 13. The upper surface of the dish-shaped head 19 of the pressing member 15 is in contact with the lower surface of the power transmission member 11. Between the lower surface of the head 19 of the pressing member 15 and the upper surface of the power transmission member 3, an elastic member 21, for example, a disc spring, is mounted as an elastic member. The head 19 of the pressing member 15 is constantly urged in a direction to push up the power transmission member 11.

With the above configuration, the power transmission member 3 and the power transmission member 11 are always separated from each other by the pressing member 15 provided with the elastic member 21 provided between the power transmission member 3 and the power transmission member 11. Pushed in the direction. For this reason, the fork 7 screwed to the power transmission member 3 is connected to the power transmission member 11 via the pin 9, so that the pin 9 and the power transmission member 11 are connected as shown in FIG. Since there is a slight tolerance in the machining, a gap H1 is generated by being pressed by the pressing member 15, and a gap H2 is formed between the fork 7 and the pin 9. In this way, the load side comes into contact with the repelling force of the elastic machine 21 provided on the pressing member 15, and the gaps H1 and H2 are generated on the non-load side, and the gap generated by machining is brought to one side. For this reason, the force can be accurately transmitted, and the positional accuracy can be improved.

When a force F is applied from the plate, which is the driven member 11, as shown in FIG. 2, rattling occurs unless the force F exceeds the repulsive force of the elastic machine 21. do not do. Even when the force F exceeds the resilience, if the cycle (speed) of the force F is fast and the stroke is short, the hole 13 provided at the tip of the power transmitting member 3 and the hole 13 are inserted. The air in the air chamber 23 formed between the pressing member 15 and the leg 17 is compressed, and the backlash is easily repaired.

FIGS. 3 and 4 show a second reference example. The same components as those in the first reference example are denoted by the same reference numerals and description thereof is omitted. This reference example has a configuration in which, as in the first reference example, the play generated by the resilience of the elastic machine 21 is directed to the non-load side.

That is, A fork 7 is screwed onto the screw 5 of the power transmission member 3, and a power transmission member 11 is rotatably mounted on the fork 7 via a pin 9.

The power transmission member 3 is provided with a projection 25 at the tip (upper portion in FIGS. 3 and 4), and the power transmission member 11 is provided with a groove 27 into which the projection 25 enters. A projectile 25 is mounted on the projecting portion 25, and is urged in a direction in which the space between the power transmission member 3 and the power transmission member 11 is widened.

With the above configuration, as shown in FIG. 4, there is a slight machining tolerance between the pin 9 and the power transmission member 11, so that the repelling A gap H1 is generated by being pushed by the force, and the fork 7 and the pin 9
And a gap H2 is generated. As described above, the load side abuts due to the repelling force of the elastic machine 21, and the gaps H1 and H2 are generated on the non-load side, and the gap generated by machining is shifted to one side. Similar effects can be exerted. When a force F is applied from the plate as the driven member 11 as shown in FIG. 4, no play occurs unless the force F exceeds the elasticity of the elastic machine 21.

FIG. 5 shows an embodiment according to the present invention, and the same parts as those in the first embodiment are denoted by the same reference numerals and description thereof will be omitted. This embodiment differs from the first embodiment in that a wedge member is added to the pin 9, and only the additional member will be described in detail.

A fork 7 screwed to the tip of the power transmission member 3 with a screw 5 is connected to the power transmission member 1 via a pin 9.
Connected to one. The pin 9 is provided with a wedge member 29, and the wedge member 29 is provided on both ends of the pin 9.
1a and 31b, and a fastening member 33 for moving the wedge bodies 31a and 31b forward and backward.

The wedge members 31a and 31b are inserted into a wedge engaging groove 35 provided at one place on the outer periphery of the pin 9, and the position of the wedge engaging groove 35 is determined by the pressing member 15 provided on the power transmission member 3. The driven power transmission member 11 is pushed, and the pin 9 is
Are positioned closer to the load side (the upper side in FIG. 5) of the engagement hole of FIG. The wedge bodies 31a and 31b are each formed on one side with an arc surface 37 having the same outer diameter as the pin 9 and on the other surface formed on the wedge engaging groove 35 with an inclined surface 39 having an inclined surface whose depth increases outward. A slidable slope 41 is formed along.

Further, a hole 43 is formed in the wedge body 31a.
b, a screw hole 45 is provided, a stepped bolt as a fastening member 33 is screwed into the screw hole 45, and a large-diameter portion 33a of the fastening member 33 is inserted into a hole 43 provided in the wedge body 31a. The small diameter portion 33b of the member 33 is screwed into a screw hole 45 provided in the wedge body 31b.

With the above structure, the power transmission member 3 and the power transmission member 11 are always separated from each other by the pressing member 15 provided with the elastic member 21 provided between the power transmission member 3 and the power transmission member 11. Pushed in the direction.

For this reason, a mechanical tolerance is provided between the pin 9 and the driven member 11 and between the pin 9 and the fork 7, and a gap is formed on the non-load side by the difference of the tolerance. However, by tightening the fastening member 33 attached to the wedge members 31a and 31b, which are the wedge members 29, it is possible to fill a gap on the non-load side generated between the pin 9 and the fork 7. That is, when the fastening member 33 is tightened, the pin 9
The wedge bodies 31a, 31b provided at both ends of the pin 9 move inward each other, and along the inclined surface 39 provided on the pin 9, the wedge bodies 31a, 31b are provided.
Slope 41 formed in 31b slides, and wedges 31a, 31
The circular arc surface 37 formed on the outer periphery of b can protrude from the outer peripheral surface of the pin 9 to fill the gap.

FIGS. 6 and 7 show a third reference example, and the same parts as those in the first reference example are denoted by the same reference numerals and description thereof is omitted. This reference example differs from the first reference example in that it does not include a pressing member provided with an ammunition.

A plate, which is a power transmission member 11, is rotatably mounted via a pin 9 to a fork 7, which is screwed to the tip of a shaft, which is the power transmission member 3, with a screw 5, thereby forming the joint 1. doing.

A pressing member 47 is provided at the tip (the upper part in FIGS. 6 and 7) of the power transmission member 3, and a nut 49 for preventing loosening is attached to the screw 5 of the power transmission member 3.

By screwing the power transmitting member 3 into the fork 7, the lower surface of the power transmitting member 11 is pressed by the upper surface of the pressing member 47 provided at the tip of the power transmitting member 3. After pressing, the nut 49 screwed to the screw 5 is rotated to tighten the lower surface of the fork 7 to prevent loosening.

Therefore, the gaps between the pin 9 and the power transmission member 11 and between the pin 9 and the fork 7 due to machining tolerances are brought to one side, and are shown in FIG. Thus, the gaps H1 and H2 are formed on the non-load side, and no play occurs on the load side. For this reason, the force can be accurately transmitted, and the positional accuracy can be improved.
When the force F is applied from the power transmission member 11, the force F is directly applied by the pressing member 47 provided on the power transmission member 3.
As a result, no backlash occurs (see FIG. 7).

FIGS. 8, 9 and 10 show a fourth reference example, in which the same parts as those in the first reference example are given the same reference numerals and description thereof is omitted. Note that this embodiment is different from the first embodiment in that a pin is provided with a wedge member instead of a pressing member provided with an elastic machine.

A plate 1 serving as a power transmitting member 11 is rotatably mounted via a pin 9 on a fork 7 screwed to a tip of a shaft serving as a power transmitting member 3 with a screw 5 to form the joint 1. doing.

The pin 9 is provided with a wedge member 51. The wedge member 51 includes a counter load surface (the lower side in FIGS. 9 and 10) of the pin 9 and the fork 7, a pin 9 and the driven power transmission member 1.
1 (on the lower side in FIGS. 9 and 10). A wedge engaging groove 53 having the same shape is formed on the left and right sides of the pin 9, and the bottom surface (the upper side in FIGS. 9 and 10) of the wedge engaging groove 53 has a V-shaped inclined surface 55 a, 55b are formed.

A wedge member 59 as a wedge member 51 having a slidable slope 57 formed along the slopes 55a and 55b.
a, 59b, 59c, 59d are attached, and the fastening member 61
The wedge bodies 59a and 59b are fastened by fastening bolts a and 61b.
b, the wedge bodies 59c and 59d are provided as a set so as to be able to move forward and backward relative to each other.

As shown in FIG. 10, the wedge members 59a and 59d are provided with holes 63, and the wedge members 59b and 59c are provided with screw holes 65.
1b is screwed. Also, the wedge body 59
The same arc surface 37 as the outer periphery of the pin 9 is formed on the outer periphery of a, 59b, 59c, 59d.

With the above configuration, a mechanical tolerance is provided between the pin 9 and the power transmission member 11 and between the pin 9 and the fork 7, and a gap is generated by the difference of the tolerance. This gap is formed by wedge members 59a and 59b and wedge member 59.
It can be filled by tightening the fastening members 61a and 61b attached to c and 59d. That is, when the fastening members 61a and 61b are tightened, the wedge bodies 59a and 59b and the wedge bodies 59c and 59d move inward each other, and move along the inclined surfaces 55a and 55b provided on the pin 9 to form the wedge bodies 59a and 59b.
Slope 57 formed on b, 59c, 59d slides, and arcuate surface 37 formed on the outer circumference of wedge bodies 59a, 59b, 59c, 59d can protrude from the outer circumference of pin 9 to fill the gap.

However, if the fastening members 61a and 61b are excessively tightened, they will not act as a turning couple, so it is necessary to tighten them with an appropriate force. Thus, the force can be accurately transmitted, and the positional accuracy can be improved.

FIG. 11 shows a fifth embodiment, and the same parts as those in the first embodiment are denoted by the same reference numerals and description thereof will be omitted. This reference example is different from the fourth reference example in the configuration of the wedge member.

That is, the pin 9 is provided with a wedge member 67, and the wedge member 67 is provided over the fork 7 and the power transmission member 11 with which the pin 9 is in contact, and the counter load surface of the pin 9 and the fork 9 (see FIG. 11 is provided on the load surface of the pin 9 and the power transmission member 11 (the lower side in FIG. 11). A wedge engaging groove 69 is formed in the pin 9, and an inclined surface 71 a of which the depth of the inclined surface is increased inward from both ends of the pin 9 on the bottom surface (upper side in FIG. 11) of the wedge engaging groove 69. , 71b are formed. The wedge members 75a and 75b, which are the wedge members 67 having the slidable slopes 73 formed along the slopes 71a and 71b, are mounted.
A spring 77 (for example, a disc spring) is built in between the wedge bodies 75a and 75b, and the wedge bodies 75a and 75b are provided so as to be able to move forward and backward by a fastening bolt or the like as a fastening member 79.

A hole 81 is provided in the wedge body 75a, and a screw hole 83 is provided in the wedge body 75b.
Is screwed. Also, the wedge body 75
a, 75b, on the outer circumference of the same arc surface 3 as the outer circumference of the pin 9
7 are formed.

With the above configuration, a machining tolerance is provided between the pin 9 and the power transmission member 11 and between the pin 9 and the fork 7, and a gap is generated by the difference of the tolerance. This gap can be filled by operating the fastening member 79 attached to the wedge bodies 75a and 75b. That is, when the fastening member 79 is rotated in the loosening direction,
The wedge members 75a and 75b move outward by the urging of the wedge members 75a and 75b along the inclined surfaces 71a and 71b provided on the pin 9.
a, 75b slide on the slope 73, and the wedges 75a,
The circular arc surface 37 formed on the outer periphery of 75b can protrude from the outer peripheral surface of the pin 9 to fill the gap.

[0037]

As will be understood from the above description of the embodiment, in short, the present invention provides a power transmission member (1) in a fork (7) fixed to the tip of a power transmission member (3).
1) is arranged, and the fork (7) and the power transmission member (11) are connected via a pin (9) penetrating the fork (7) and the power transmission member (11). A fork (7) and a pin (9) between the power transmission member (3) and the power transmission member (11).
To move the driven member (11) away from the power transmitting member (3) in order to simultaneously remove the gap between the power transmitting member (3) and the gap between the pin (9) and the driven member (11). And a resilient member for urging the pressing member (15) toward the power transmission member (11), and a pressing member (15) for pressing the pressing member (15). An inclined surface (39) is provided on the opposite side of the pin (9) where the fork (7) and the pin (9) are closely contacted by the action, and the inclined surface (39) and the fork (7) are provided.
And wedges (31a, 31b) for filling the gap between the pin (9) and the fork (7).

As is apparent from the above configuration, the present invention provides:
A power transmission member 11 is disposed in a fork 7 fixed to a tip end of the power transmission member 3, and the fork 7 is inserted through the fork 7 and a pin 9 penetrating the power transmission member 11.
And the power transmission member 11, the gap between the fork 7 and the pin 9 and the clearance between the pin 9 and the power transmission member 11 are simultaneously removed. Since the pressing member 15 for pressing in a direction away from the power transmission member 3 is provided, the power transmission member 3 and the power transmission member 11 can be rotated in a state where the gaps are moved to one side. In addition to being able to be connected, slight backlash between the two can be eliminated, the force can be accurately transmitted, and the positional accuracy between the two can be improved.

Further, in the present invention, an elastic member is provided for urging the pressing member 15 toward the power transmission member 11, and the fork 7 and the pin 9 are brought into close contact with each other by the action of the pressing member. An inclined surface 39 is provided on the opposite side of the pin, and between the inclined surface 39 and the fork 7,
Since the configuration is such that a wedge member for filling the gap between the two is arranged, the gap between the pin 9 and the fork 7 can be effectively eliminated by the combined action of the elastic member and the wedge member. It is.

[Brief description of the drawings]

FIG. 1 is a front view of a joint according to a reference example of the present invention.

FIG. 2 is a sectional view taken along the line II-II in FIG.

FIG. 3 is a front view showing a joint according to a reference example of the present invention.

FIG. 4 is a sectional view taken along line IV-IV in FIG. 3;

FIG. 5 is a sectional view showing a joint according to an embodiment of the present invention.

FIG. 6 is a front view showing a joint according to a reference example of the present invention.

FIG. 7 is a sectional view taken along the line VII-VII in FIG. 6;

FIG. 8 is a front view showing a joint according to a reference example of the invention.

FIG. 9 is a sectional view taken along line IX-IX in FIG.

FIG. 10 is an enlarged view of a portion viewed from an arrow X in FIG. 9;

FIG. 11 is a sectional view showing a joint according to a reference example of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 joint 3 power transmission member 7 fork 9 pin 11 driven power transmission member 15 pressing member 21 elastic machine 29 wedge member 31a wedge body 31b wedge body 33 fastening member 47 pressing member 51 wedge member 59a wedge body 59b wedge body 59c wedge body 59d wedge Body 61a Fastening member 61b Fastening member 67 Wedge member 75a Wedge body 75b Wedge body 79 Fastening member

Claims (1)

(57) [Scope of request for utility model registration] 1. A power transmission member (11) is arranged in a fork (7) fixed to a tip of a power transmission member (3),
In a joint formed by connecting the fork (7) and the driven member (11) through a pin (9) penetrating the fork (7) and the driven member (11), the power transmitting member ( 3) a gap between the fork (7) and the pin (9) and a gap between the pin (9) and the driven member (11) between the driven member (11) and the driven member (11); To simultaneously remove the power transmission member (11).
And a pressing member (15) for pressing the pressing member in a direction away from the power transmission member (3).
An elastic member is provided for urging the pin toward the driven member (11), and the fork (7) and the pin (9) are brought into close contact with each other by the action of the pressing member (15). An inclined surface (39) is provided on the opposite side of (9), and a pin (9) is provided between the inclined surface (39) and the fork (7).
(31) for filling the gap between the fork (7)
a, 31b) are arranged.