JPH0257938A - Apparatus for checking equal velocity coupling - Google Patents

Abstract

PURPOSE:To ensure the checking of the function of an equal velocity coupling by inclining an inner member, imparting a rotary driving force to the outer member of the equal velocity coupling, detecting the change in rotary torque at this time, and judging the pass or fail of the equal velocity coupling. CONSTITUTION:A driving device 4 is made to be in an orthogonally crossed state. An equal velocity coupling X is held with a bearing 2a of an outer holding means 2. Then a lifting cylinder 23 is driven. A driving shaft 3 is engaged with the spline of the coupling X. Then, a motor is driven, and a torque meter 8 and the shaft 3 are rotated. Thereafter, an inclining cylinder 34 of a parallel link device 7 is compressed, and moving links 29 and 30 are moved around supporting shafts 5 and 6. Thus the device 4 is inclined. At this time, the positions of the inclining centers O and O' of the device 7 and the coupling X are deviated. The centers are made to follow and inclined by the movement of the shaft 3 with a floating holder 10. During the inclination, confirmation of the number of balls in the coupling X and the change in rotary torque during the inclination of the shaft 3 are detected with each sensor and the meter 8. The quality of the coupling X is judged with a control device.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention applies rotational driving force to the outer member of a constant velocity joint while tilting its inner member, and detects changes in rotational torque at this time. The present invention relates to an inspection device for determining the quality of constant velocity joints.

(Prior Art) Conventionally, a constant velocity joint that has an inner member and an outer member coaxially is used, for example, in an automobile, and is used in a constant velocity joint of a drive shaft that transmits rotation from the drive side at a constant velocity when a wheel or the like swings. The quality of the ball joint is judged by the operator's feeling when the operator tilts the inner member relative to the outer member. According to this method,
Since the judgment of acceptability is made by the operator's senses, it is possible to detect a feel lock during this tilting, where the ball of the inner member is not smoothly transferred to the outer member.

However, since it is done manually by the operator, the work efficiency is low, and there are many erroneous judgments, making it difficult to accurately judge whether it is good or bad.

Therefore, as a device that automatically performs this,
The one described in No. 201631 is known. This system tilts the inner member to the maximum practicable predetermined angle relative to the outer member and holds it rotatably, rotates the outer member that engages with the inner member via a ball, and detects changes in rotational torque. The upper limit value, lower limit value, and torque fluctuation of the detected rotational torque are compared with a preset reference value to determine whether the constant velocity joint is good or bad.

However, with this device, when the outer member is rotated while the inner member is tilted and held at a maximum predetermined angle, the rotational torque value increases, and small torque changes such as feel lock cannot be detected, so it is difficult to detect whether the constant velocity joint is good or not. This has the disadvantage that it may lead to incorrect judgment.

Further, the outer member of the constant velocity joint incorporating the inner member and the outer member is held by the outer holding means, and the inner drive means, which is movable forward and backward, approaches and engages with the inner member to rotate it. In a device in which the constant velocity joint is inspected by tilting the inner member using a tilting means to detect rotational torque, if the outer member is attached to the outer holding means with errors in the front, back, left, right, and up and down directions, the tilting may occur. Since the tilting center of the means is fixed, a positional shift occurs between the tilting center of the tilting means and the tilting center of the constant velocity joint when engaged and tilted. The inner drive means is slightly displaced toward the tilting center of the displaced constant velocity joint and engages with the inner member. As a result, an uneven load from the inner driving means acts on the inner member. In this state, the inner member is rotated and tilted, so the rotational torque to be detected fluctuates, making it impossible to accurately detect rotational torque. Therefore, in order to accurately detect rotational torque, it is necessary to accurately position the outer member and engage the inner member and the inner drive means within a predetermined allowable unbalanced load, and this positioning work is complicated. be.

(Problems to be Solved by the Present Invention) An object of the present invention is to provide a detection device for a constant velocity joint that can reliably and easily inspect the function of a constant velocity joint by eliminating such conventional inconveniences. do.

(Means for Solving the Problems) In order to achieve the above object, the inspection device of the present invention is provided with an outer holding means for rotatably holding the outer member in which the inner member of the constant velocity joint is assembled. An inner drive means is provided which is movable forward and backward facing the outer holding means and engages with the inner member and rotationally drives the inner member, and a tilting means which tilts the inner drive means around a center of tilting between the inner member and the outer member. and a drive torque detection means for detecting the drive torque by the inner drive means, and a determination means for comparing the detected torque value detected by the drive torque detection means with a set torque value at each tilting angle to determine pass/fail. In an inspection device that inspects a constant velocity joint by providing a In response to positional deviation occurring in the direction, a drive shaft provided in the inner drive means that slidably engages with the inner member is moved to a tilting center of the inner member and outer member that is displaced from the tilting center of the tilting means. It is characterized in that it is provided with floating means for holding it so as to be able to swing toward it.

(Function) According to this configuration, the inspection device of the present invention holds the outer member of the constant velocity joint in the outer holding means, brings the inner drive means closer, and connects the outer member of the constant velocity joint to the inner drive means via the floating means. The drive shaft connected to the inner member is engaged with the inner member within the outer member. At the time of this engagement, if the tilting center of the constant velocity joint side and the tilting center of the tilting means are misaligned, the driving is performed with the floating means as the rocking center so that an unbalanced load does not act on the inner member. The shaft is swung toward the tilting center of the constant velocity joint whose axis is misaligned and engaged.

Then, the inner member is rotated by the inner driving means around the tilting center on the side of the shifted constant velocity joint. In this state, the inner drive means is tilted around its tilting center by the tilting means. During tilting, the drive shaft rotates while being swingably held toward the center of tilting on the constant velocity joint side via the floating means, as in the case of engagement. The rotational torque at this time is detected by the drive torque detection means, and the detected torque is compared with the set torque value at each tilt angle by the determination means to determine whether the constant velocity joint is good or bad.

(Example) An apparatus for implementing the present invention will be described in detail below with reference to FIGS. 1 to 5.

Fig. 1 is a side view, Fig. 2 is a rear view, Fig. 3 is an explanatory sectional front view, Fig. 4 is a partially enlarged sectional view of the inner drive means,
FIG. 5 is a diagram showing the configuration of the device.

In this embodiment, an inner member having a spline carved on the inner periphery is incorporated into an outer member of a constant velocity joint The constant velocity joint X is inspected by detecting the constant velocity joint
A drive device, which is an inner drive means, includes an outer holding means 2 that rotatably holds an outer member of the outer member, and a drive shaft 3 that descends from an opposing position above the outer holding means 2 and engages with the inner member. 4, a parallel link device W7 having a support shaft 5.6 on the machine base 1 as shown in the second figure and serving as a tilting means for holding and tilting the drive device 4, and connected to the drive device 4 as shown in the fifth figure. A control device 9 includes a torque meter 8 as a drive torque detection means for detecting the generated torque, a means for controlling the main body of the apparatus, and a determination means for determining the quality of the constant velocity joint X, as shown in the fourth figure. The drive device 4 is provided with a tilting center on the constant velocity joint side that is parallel to the parallel link device 7.
Floating means for swingably holding the drive shaft 3 which engages with the inner member at the position of displacement O'' and the spline described below when the position shifts from the tilting center 0 in the front, back, left, right, and up and down directions. It consists of a holder 10.

As shown in the first diagram, the drive device 4 connects a driven part 4a equipped with a drive shaft 3 that is swingably held above the outer holding means 2 via a floating holder 10, a speed reducer 13, and an electric motor 14. The rotational driving force of the driving part 4b is transmitted to the driven part 4a by the heald 12 provided above. Reference numeral 15 indicates a torque limiter connected to the drive section 4b, and as shown in the first figure, the left front driven section 4a is connected to the drive section 4b.
A tilting girder 11 supporting the drive unit 4b is provided at a position across the rear parallel link device 7, and the tilting girder 11 is provided to support the parallel link device 7 via the tilting girder 11 so that it can freely tilt at the positions C and 2 shown in the third figure. Retained.

As shown in FIG. 4, the drive shaft 3 of the driven part 4a is chamfered on the outer periphery of the distal end to form a spline that engages with the inner member, and has an angular stepped part 3a provided at the rear end of the drive shaft 3. It is held in a holder 10.

The floating holder 10 is provided with a swinging member 16 having a flanged projection 16a and bearings 16b arranged above and below the swinging member 16,
On the outer periphery of the upper end of the swinging member 16, an outer circumferential spline 16c having an arc-shaped tooth surface is carved, and an angular step portion 16d for fitting and holding the drive shaft 3 is provided. An outer case 17 is provided for holding the device. An inner circumferential spline 17a having an arcuate tooth surface shape is carved in the upper part of the bearing of the outer case 17, and an outer circumferential spline 16c of the swinging member 16 and an inner circumferential spline 17 of the outer case 17 are formed.
A connecting member 18 having splines 18a and 18b that mesh with the outer case 17 is provided, and the drive shaft 3 is connected and held via the connecting member 18 around a bearing 16b of the outer case 17 so as to be swingable.

The floating holder 10 is connected to a spline engagement means (not shown) that is disengaged upward in response to overload. The meshing means is slidably connected to a torque meter 8 driven by a belt 12. A data sampling encoder 19 is provided at the upper end of the torque meter 8. Lower mounting plate 2 protruding from the tilting girder 11 to the left front
0, and an elevator frame 21 that holds the drive shaft 3 through the spline engagement means is provided below the lower mounting plate 20. A guide 22 is provided to guide the elevator frame 21 so that it can be raised and lowered, and an elevator cylinder 23 is provided on the lower mounting plate 20 so that the drive shaft 3 can be attached to and removed from the constant velocity joint X via the elevator frame 21. The torque meter 8 is held at its upper and lower sides by upper intermediate mounting plates 24 and 25 that project forward from the tilting girder 11.

As shown in the third diagram, the outer holding means 2 is provided with a bearing portion 2a that rotatably holds the tilting center 0 of the constant velocity joint X at the same height as the center of the support shaft 5.6 of the parallel link device 7, A dispensing cylinder 26 is provided for dispensing the constant velocity joint X held on the bearing portion 2a at the end of the inspection.

As shown in the third diagram, the parallel link device 7 includes upper and lower parallel links 27, 28, swing links 29, 30 of the same length that allow the parallel links 27, 28 to move left and right, and upper parallel links 27 and left and right Connecting pins 27a and 27b that swingably support the swinging link 29.30, and the swinging link 29.3.
0 is provided with a support shaft 5.6 that is swingably supported at the same height as the center of tilt of the constant velocity joint A link mechanism is formed and provided that connects B, C, 2, H, H, and G. Furthermore, a tilting cylinder 34 that is connected to a support shaft 33 of a connecting portion E between the lower parallel link 28 and the right swinging link 29 and swings the swinging link 29, 30 is swingably attached to the left side fixed plate 32. establish. The parallel links 27, 28 swingably hold the tilting girder 11 in the eight and two positions, and the actuation of the tilting cylinder 34 pulls and tilts the drive device 4.

Next, the operation of the implementation device will be explained.

First, the drive device 4 is placed in an upright position, and as shown in the third figure,
A constant velocity joint X, which is a test object, is rotatably held in a bearing 2a of an outer holding means 2. Next, the elevator frame 21 is lowered by driving the elevator cylinder 23 of the drive device 4, and the drive shaft 3
is engaged with the spline of the inner member of constant velocity joint X. At this time, the tilting center O of the parallel link and the constant velocity joint
A slight positional deviation may occur between the tilting center of 0° due to positioning of the outer member of the constant velocity joint X, manufacturing error, etc. In this case, as shown in FIG. 4, when the drive shaft 3 is lowered by the elevator frame 21, the chamfered end of the spline of the drive shaft 3 is guided by the spline of the constant velocity joint X, and the drive shaft 3 is lowered. The constant velocity joint X swings around the floating holder 10 as a swing center and engages with the inner member at a position of the tilt center 0'' of the constant velocity joint X, which is displaced from the tilt center 0.

In this state, by driving the electric motor 14 shown in the first figure, the torque meter 8, the spline engagement means, and the drive shaft 3, which constitute the driven portion 4a, are rotated via the belt 12.

Thereafter, as shown in the third figure, the tilting cylinder 34 of the parallel link device 7 is compressed to move the swinging link 29, 30 to the support shaft 5.
Rock around 6. The swing link 29.30 is a support shaft 5.6 whose axial center position coincides with the tilting center O of the constant velocity joint X.
Since the fulcrum is the same length, the parallel link 27.28
are pulled parallel to each other in response to the swinging of the swing links 29 and 30, and the parallel link device 7 moves from the positions of A2B, C, 2, H, G, G to A1R, H, 2, and so on. It is moved to the imaginary line position of H, H, H. Due to the movement of the parallel links 27.28, the tilting girder 11, which is swingably connected to the parallel links 27.2B at the 8 and 2 positions, moves from the C, 2, and 0 positions to the H, H, and 0 positions, respectively.
It is tilted to the 2,0 position, and the drive device 4 attached thereto is tilted. At this time, although the tilting center O of the parallel link device 7 and the tilting center O'' of the constant velocity joint
As a result of the rocking, it is tilted without causing an unbalanced load.

While driving the drive shaft 3 as described above, it is tilted,
Inspect during the tilting. This test will be explained using FIG. 4.

The inspection is performed by checking the number of balls in the constant velocity joint Determine whether the constant velocity joint X is good or bad. The control device 9 includes a ball detection proximity sensor 3
5, a strain amplifier 37 connected to the torque meter 8, a data setting terminal 38 for setting and inputting data, a display 39 and printer 40 as output means, and a tilting of the drive shaft 3. A tilt angle detection sensor 41 that detects the angle, and a C P (J4
2, and a main body control device 43 is connected to the CPU 42.

The number of balls is inspected by continuously detecting the number of balls with the ball detection sensor 35 during maximum tilting, counting the number of balls of the constant velocity joint X in one revolution of the drive shaft 3, and checking the number of balls with the CPU.
42 and output.

To detect changes in rotational torque, since the generated torque fluctuates with a maximum value and a minimum value, the range of each allowable value at a predetermined tilt angle, that is, the maximum torque allowable range and the minimum torque, is determined in advance in accordance with the generated torque. Set the allowable range, center torque allowable range, torque increase rate during the allowable torque, and at the maximum and minimum values.

When tilting the drive shaft 3, the torque meter 8 and the tilting angle detection sensor 41 detect the maximum and minimum values of the generated torque at each tilting angle, and determine the center torque value, torque fluctuation and torque at each tilting angle. The increase rate is arithmetic processed by the CPU 42 and compared with each preset allowable value to judge whether it is good or bad.

In this way, the maximum torque value, the minimum torque value, the center torque value at a plurality of predetermined tilt angles of the drive shaft 3, the increase rate on the maximum torque value side and the minimum torque value side during torque fluctuation, and between each predetermined tilt angle. By setting each allowable value of the torque increase rate and comparing the calculated values of the generated torque values detected by the torque meter 8 and the tilt angle detection sensor 41, the state and function of the constant velocity joint X can be accurately inspected. be able to.

In particular, since the torque increase rates at the maximum and minimum torque values are also compared, even minute torque changes such as feel lock that occur during tilting can be detected, further increasing the accuracy of the inspection.

In addition, this device automatically determines the quality of the constant velocity joint X, and since the outer holding means 2 for holding the constant velocity joint It can be easily placed in the process, and installation and inspection can be performed consistently, improving work efficiency.

(Effects) As is clear from the above description, the present invention holds a constant velocity joint in the outer holding means, and the drive shaft, which is swingably held via the floating means of the inner drive means, is subjected to an uneven load. It can be easily fixed to the outer member by removing the influence, and the drive shaft is tilted by the tilting means while applying a rotational driving force, and the rotational torque is detected by the drive torque detection means and output to the determination means. By comparing and determining the quality of the constant velocity joint, it is possible to provide a constant velocity joint detection device that can reliably and easily inspect the function of the constant velocity joint.

[Brief explanation of the drawing]

1 to 5 show an embodiment of the present invention, in which FIG. 1 is a side view, FIG. 2 is a rear view, FIG. 3 is an explanatory sectional front view, and FIG. 4 is a portion of the inner drive means. The sectional view and FIG. 5 show the configuration of the device. Outer holding means Drive shaft Inner drive means Tilting means Drive torque detection means Judgment means Floating means Tilting center of tilting means Tilting center of constant velocity joint Constant velocity joint FIG, 2 1c:1

Claims (1)

[Claims] An inner member is provided with an outer holding means for rotatably holding the outer member in which the inner member of the constant velocity joint is assembled, and is movable forward and backward in opposition to the outer holding means to engage with the inner member and rotationally drive the inner member. A drive means is provided, a tilting means is provided for tilting the inner drive means around a tilting center of the inner member and the outer member, a drive torque detection means is provided for detecting a drive torque by the inner drive means, and the drive torque detection means is provided. In an inspection device for inspecting a constant velocity joint, the inner drive means is engaged with the inner member, and the inspection device is provided with a judgment means for comparing the detected torque value detected by the set torque value at each tilt angle to judge whether it is good or bad. When this occurs, the inner driving means that is slidably engaged with the inner member is fixed against positional deviations that occur in the front, rear, left, right, and up and down directions between the tilting center of the inner member and the outer member and the tilting center of the tilting means. An inspection device for a constant velocity joint, characterized in that a floating means is provided for holding a drive shaft provided therein so as to be able to swing toward the tilting center of the inner member and the outer member which are displaced from the tilting center of the tilting means.