JP2550645B2 - Flex joint bending torque adjustment device - Google Patents

Description

The present invention relates to a bending torque adjusting device for a hooks joint in which a bearing cup is fixed to a yoke.

[Conventional technology]

In a hooks joint 10 used for a propeller shaft of an automobile as shown in FIGS. 2 and 7, a bearing cup 11 is fixed by caulking an inner peripheral wall surface of a yoke 12 at several places. There is.

When adjusting the bending torque in the direction shown by the arrow in Fig. 7 in the case of the fixing method by caulking, first measure the bending torque, and if the torque is large, the work vehicle hammers the point A or the like. Stroke to flex the forked yoke 12 elastically so that the gap between the yokes 12 becomes narrower, so that the bearing cup 11 is finely adjusted in a direction in which the bearing cup 11 is relatively removed from the yoke 12, and then the bending torque is again applied. Measure, if the torque is large, repeat the above work again,
It was adjusted so that the bending torque would be appropriate.

[Problems to be Solved by the Invention]

However, in the adjustment method as described above, the adjustment is made by adjusting the hammering of the operator, which does not directly correspond to the magnitude of the bending torque, so if the bending torque is small if the force is small due to the adjustment of the hammering force. If, on the contrary, too much force is applied, the bending torque will be too small because the bearing cup 11 will come out greatly.
There is a quality problem such as looseness at the joint part, and because of the skilled work by the operator's can and tips,
There was a risk that the working time would be uneven and the production efficiency would deteriorate.

Therefore, an object of the present invention is to stabilize the quality of the product associated with the bending torque adjustment of the hooks joint and to improve the production efficiency.

[Means for solving the problem]

Therefore, the present invention is characterized in that the bending torque of the joint portion is measured and compared with a reference value, and the yoke is pressed with a predetermined pressing force according to the determination result so that the bending torque becomes the reference value. And

Specifically, the bending torque adjusting device of the hooks joint of the present invention is a measuring means for measuring the bending torque of the joint portion, and compares the measured value measured by the measuring means with a preset reference value, When it is determined that the measured value is less than or equal to the reference value, the calculation control unit that outputs a pressurization control signal and the yoke according to the pressurization control signal from the calculation control unit are pressed to make the bending torque of the joint part equal to the reference value. It is characterized in that it is provided with a pressurizing means for adjusting it to a value.

[Action]

As a result, when the magnitude of the bending torque deviates from the preset reference value, the yoke is pressed with a predetermined pressing force so that the bending torque of the joint portion is adjusted to the reference value. It is possible to stabilize the quality of the product accompanied by the adjustment of the bending torque and improve the production efficiency.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an overall configuration diagram of an embodiment of the present invention. In the figure, 10 is a hooks joint, 20 is a measuring means, 30 is an arithmetic control means, and 40 is a pressurizing means.

As shown in FIG. 2, the hook joint 10 uses a shell shape as the bearing cup 11, and after the yoke 12 and the spider 13 are positioned and fixed, the yoke 12
The bearing cup 11 is inserted into the fitting hole 14 and the inner peripheral wall surface of the fitting hole 14 is caulked at several places to fix the bearing cup 11. In this embodiment, the Fuchs joint 10 is applied to a connecting portion between an input shaft 51 and an output shaft 52 of a propeller shaft of an automobile, as shown in FIG.

The measuring means 20 comprises an actuator 21 for moving the input shaft 51 to which the yoke 12 is connected, a torque sensor 22 and a torque amplifier 23. The actuator 21 is a known air cylinder (or hydraulic cylinder), one end of which is locked to the torque sensor 22 and the other end of which is fixed to a predetermined site such as a production line, and pressurized air is supplied from the air pump 53. This allows the rod 211 to move in the axial direction. The torque sensor 22 has a swing rod with one end fitted in the input shaft fitting hole 511 of the input shaft 51 and a strain gauge 221 attached thereto.
222 and the other end of the swing rod 222, and the actuator
It includes a swing rod support 223 to which the rod 211 of 21 is locked. The torque amplifier 23 amplifies the signal based on the resistance change of the strain gauge 221, and outputs the signal to the control means 30. Therefore, when the measuring means 20 fixes the output shaft 52 of the propeller shaft by the clamper 55 and then the compressed air is supplied to the actuator 21, the actuator 21 moves the rod support member.
The swing rod 222 and the input shaft 51 are moved upward in the figure via 223. At this time, since the rocking rod 222 and the rocking rod support 223 are only supported at one end,
The oscillating rod 222 is deformed by an amount corresponding to the bending torque of the Fuchs joint 10, and the bending torque can be measured by detecting this deformation from the resistance change of the strain gauge 221. There is.

The arithmetic control unit 30 inputs a signal T corresponding to the bending torque from the strain gauge 221, and sets the signal T to a reference value TP (bending torque OK zone) preset to a value in the range shown in FIG. The bending torque T of the joint is determined by comparing with
If it is within the range (OK zone), a signal indicating the completion of adjustment is output, and if it is determined that the reference value is TP or more (-NG zone), the signal indicating that adjustment is impossible is output and the bending torque T When it is determined that the magnitude of the pressure is less than or equal to the reference value TP (+ NG zone), the pressurization control signal is output to the pressurizing means 40.

The pressurizing means 40 includes an amplifier 41 for amplifying the pressurizing control signal output from the arithmetic control means 30, and a hydraulic control valve 42.
And a pressure actuator 43. The hydraulic control valve 42 is interposed between the hydraulic pump 54 and the pressurizing actuator 43, and is based on the amplified pressurizing control signal.
The hydraulic pressure from 54 to the pressure actuator 43 is adjusted. The pressure actuator 43 is a hydraulic control valve.
Hydraulic cylinder 431 to which hydraulic pressure adjusted by 42 is sent
And pressure bars 434 and 435, one ends of which are connected to the rods 432 and 433 of the hydraulic cylinder 431, and the pressure bar 43.
4 and 435, and pressers 436 and 437 fixed to the other ends thereof, respectively. The central portions of the pressure bars 434 and 435 are connected by the extension members 438 and 439,
It is designed to be movable with the connecting portion as a fulcrum. Presser
As shown in FIG. 4, 436 and 437 are formed in an elongated shape with a substantially semicircular cross section, and the crimped portions of the yoke 12 are provided at several positions.
Of the fifteen, the two caulking portions 15 are pressed. According to the pressurizing actuator 43 of the present embodiment, by applying hydraulic pressure to the hydraulic cylinder 431, the pressurizing bar 4
34 and 435 are movable, and the crimped portions 15 of both of the yokes 12 can be pressurized with a single pressurization. Therefore, in the pressurizing means 40, the hydraulic pressure control valve 42 adjusts the hydraulic pressure according to the pressurizing control signal from the arithmetic control means 30, and the hydraulic cylinder 431 is driven, so that the pressurizers 436 and 437 are located on both sides of the yoke 12. The caulking portion 15 of the hook joint 10 can be pressurized at once.

FIG. 5 shows a flowchart of the bending torque adjustment. First, the bending torque T of the hooks joint 10 crimped with a predetermined force is measured by the measuring means 20. The measurement result of the bending torque T is input to the arithmetic control unit 30, and the arithmetic control unit 30 compares the measured bending torque T with a preset reference value TP (range value of the Ok zone) to make an adjustment. Determine the state. If the bending torque T is within the range of the reference value TP (OK zone), a signal indicating that adjustment is completed is output, and if it is less than the reference value TP (-NG zone), a signal indicating that adjustment is impossible is output. At the same time, when the magnitude of the bending torque T is determined to be the reference value TP or more (+ NG zone), the pressurizing control signal is sent to the pressurizing means 40.
Output to. A signal indicating that adjustment is complete and that adjustment is not possible
An arbitrary display device (for example, an indicator lamp is provided on the control panel of the arithmetic and control unit 30) is driven to display the completion of adjustment and the fact that adjustment is impossible. Further, when the pressurizing control signal is output, the pressurizing means 40 pressurizes the caulking portion 15 of the yoke 12 with a constant pressurizing force, and after the pressurizing, the bending torque T is measured again, and the same as above. After making a determination, the pressure adjustment is repeated so that the bending torque T is within the range of the reference value TP (OK zone). The pressurization adjustment by the constant pressurizing force in the present embodiment is to perform pressurization by adding a predetermined pressurization width each time the bending torque T is determined to be equal to or larger than the reference value TP. Fuchs joint 10 when connecting the propeller shaft at the first pressurization in the flow
The caulking force is used as a reference pressure force, and a constant pressure width is added to this pressure force.When applying pressure from the next time onward, a constant pressure width is added to the previous pressure force. Pressurization is performed with a pressing force. As described above, according to the pressurizing adjustment by adding the constant pressurizing width, by reducing the constant pressurizing width to a small pressurizing width, the probability that the product cannot be adjusted (-NG) is reduced. In addition, since the pressurization is adjusted by the predetermined pressurizing force set in advance, the quality of the product can be stabilized and the production efficiency can be improved.

FIG. 6 shows another bending torque adjustment flowchart, and according to the adjustment flow in this embodiment,
The measurement and determination of the bending torque T is the same as the adjustment flow shown in FIG. 5, but the pressure processing is different. The pressurizing process of the present embodiment changes the pressurizing force according to the pressurizing adjustment step. First, when the torque T is determined to be equal to or larger than the reference value TP by bending the adjustment flow for the first time, the arithmetic control unit 30 outputs the initial pressurization signal T1 to the pressurization unit 40 to perform the initial pressurization. This initial pressure is
The pressing force is larger by a predetermined amount than the caulking force of the hooks joint 10 when the propeller shaft is connected. When the bending torque T is not within the range of the reference value TP (OK zone) even by the initial pressurization, the arithmetic control unit 30 outputs the rough pressurization signal T2 to the pressurizing unit 40 to perform pressurization. As shown in FIG. 3, the pressurization by the rough pressurization signal T has a large pressurization width for performing the rough adjustment, and the pressurization is performed by being added to the initial pressurization force. When the bending torque T does not reach the reference value TP (OK zone) due to the initial pressurization + rough pressurization width, the arithmetic control means 30 outputs the finishing pressurization signal T3 to the pressurizing means 40 to apply the pressurization. To do. As shown in FIG. 3, the pressurization by the finish pressurization signal T3 has a small pressurization width in order to perform the finish adjustment, and the pressurization can be performed by adding the initial pressurization + the empty pressurization width. Done. As described above, according to the pressurizing adjustment that changes the pressurizing force, the bending torque is set by arbitrarily setting the pressurizing width in consideration of the caulking force of the hooks joint 10, the material of the product, the pressurizing force of the hydraulic cylinder, and the like. The adjustment time can be shortened and the probability that adjustment is not possible (-NG) can be reduced, and since it is pressurization adjustment by a preset pressurizing force, product quality is stabilized and production efficiency is improved. Can be improved.

The specific embodiment of the present invention has been described above, but the present invention is not limited to this embodiment, and various embodiments are included within the scope of the claims. For example, the pressing force may be determined according to the magnitude of the bending torque T.

〔The invention's effect〕

As described above, according to the present invention, the bending torque of the Fuchs joint is adjusted by measuring the bending torque, and when it is determined that the bending torque needs to be adjusted, a reference value is set with a predetermined pressure applied in advance. Since the pressurization adjustment is performed so that the skilled work is unnecessary, the working time can be eliminated, the product quality can be stabilized, and the production efficiency can be improved. In particular, by stabilizing the bending torque quality of the Fuchs joint, it is possible to reduce vibration noise due to the large bending torque of the Fuchs joint, and it is possible to improve balance quality by eliminating rattling of the joint section. it can.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of an embodiment of the present invention, FIG. 2 is a schematic sectional view of a Fuchs joint, and FIG. 3 is a characteristic diagram for explaining the relationship between a bending torque and a reference value and a pressing width, FIG. 4 is an enlarged perspective view of the presser, FIG. 5 is a torque adjustment flowchart, FIG. 6 is another torque adjustment flowchart, and FIG. 7 is a partial schematic view of a propeller shaft to which a hooks joint is applied. . 10 …… Hooks joint 11 …… Bearing cup 12 …… Yoke 15 …… Caulking section 20 …… Measuring means 30 …… Computing control means 40 …… Pressurizing means

Claims (1)

(57) [Claims] 1. A bending torque adjusting device for a hooks joint in which a bearing cup is fixed to a yoke, and a measuring means for measuring a bending torque of a joint portion,
Comparing the measured value and the reference value measured by the measuring means, when it is determined that the measured value deviates from a preset reference value, an arithmetic control means for outputting a pressurization control signal, And a pressurizing means for pressurizing the yoke according to a pressurizing control signal from the arithmetic control means so as to adjust the bending torque of the joint portion to the reference value. Bending torque adjusting device.