JP4901577B2 - Rubber bushing characteristic test equipment jig - Google Patents

Description

  The present invention relates to a jig for a characteristic test apparatus for testing the static characteristics, dynamic characteristics, durability, and the like of a rubber bush.

  The rubber bush B generally has a cylindrical shape in which an elastic member 203 such as rubber is bonded and fixed between an inner cylinder 200 and an outer cylinder 201, as shown in FIG. Used for. Since various loads are applied to the rubber bush B, its performance is grasped by performing various characteristic tests such as static characteristics, dynamic characteristics, and durability.

  For example, as a characteristic test for evaluating the dynamic characteristics such as the dynamic spring constant of the rubber bush B, in addition to a test in the axial direction and a direction perpendicular to the axis, a torsion (torsion) characteristic test and a torsion (twisting) characteristic test There is.

  The torsional characteristic test is a test for measuring dynamic spring characteristics by applying a torsional load in both forward and reverse directions around the cylinder axis r of the elastic member 203 as indicated by an arrow P1 in FIG. . On the other hand, in the rolling characteristic test, as shown by an arrow P2 in FIG. 5B, for example, the inner cylinder 200 is swung around an arbitrary axis r ′ orthogonal to the cylinder axis r while the outer cylinder 201 is fixed. This is a test for measuring the dynamic spring characteristics by applying a load to the elastic member 203 by moving the elastic member 203.

  For example, Patent Document 1 discloses a torsional dynamic characteristic test apparatus relating to this type of test apparatus. There, a flange (holding part) with connecting metal fittings is attached to the output shaft for applying a rotational force to the device under test and a detector for detecting the torsional torque caused by the load. A torsional characteristic test is performed by gripping both ends of the body with each connecting metal fitting.

Patent Document 2 discloses a test apparatus that measures a spring constant in an oblique direction with respect to the cylinder axis direction of the rubber bush. Therein, a rubber bush is supported by an inner cylinder support member that supports an inner cylinder and an outer cylinder support member that supports an outer cylinder, and each support member is fastened and fixed to a test apparatus with bolts and nuts. Yes. At that time, operations such as position adjustment by attaching and detaching the spacer and vertical movement of the air bearing device are performed.
Japanese Patent No. 2723611 JP-A-5-312702

  By the way, when using a test apparatus such as Patent Document 1 for the characteristic test of the rubber bush, it is necessary to provide a jig that serves as a connecting bracket for each object to be tested. If the test was carried out by exchanging, the workability was lacking and the cost of manufacturing a jig and the like was increased. In particular, in recent years, diversification has progressed and rubber bushes having different lengths and diameters are increasing, and the above-mentioned problems are being emphasized.

  Moreover, since the rubber bush is loaded in multiple directions in addition to the axial direction and the axial orthogonal direction, it is possible to measure the rolling characteristics in addition to the torsional characteristics in the rotational direction in order to grasp the dynamic characteristics. Many. In that case, two types of jigs for torsional characteristics and for torsional characteristics have to be prepared for one rubber bush, which doubles the work burden and the cost required for measurement.

  Further, like the spring constant measuring device of Patent Document 2, there are many troublesome operations when attaching a device to be tested to the test device, and there has been a demand for means capable of more easily measuring.

  Accordingly, in view of the above problems, an object of the present invention is to provide a rubber bushing characteristic test apparatus jig that can reduce cost and is excellent in workability.

  In the first invention, the first to third jigs are provided in order to mount the rubber bush on the characteristic test apparatus, and these are combined well to be used for the torsion characteristic test and the torsion characteristic test. .

  That is, the invention of claim 1 is a characteristic in which the rubber bush is held between a pair of opposing holding portions, and the holding portions are relatively rotated around a predetermined axis to test the dynamic characteristics of the rubber bush. A jig for a test apparatus, comprising: an inner cylinder support member that is inserted and fixed to an inner cylinder of a rubber bush with both ends protruding; and an outer circumference support member that supports the outer circumference of the rubber bush. A jig, a second jig that is attached to one holding portion of the characteristic test apparatus and supports the outer peripheral support member by a support arm that extends toward the other holding portion, and is attached to the other holding portion. A third jig for supporting the inner cylinder support member.

  The third jig includes a first support part that supports one end of the inner cylinder support member so that a cylinder axis of the rubber bush matches a relative rotation axis of the holding part, It has a 2nd support part which supports the both ends of the said inner cylinder support member so that the cylinder axis of a rubber bush may be orthogonal to the said relative rotation axis | shaft.

  With this configuration, first, an inner tube of the rubber bush is supported by the inner tube support member of the first jig, and the outer periphery is supported by the outer periphery support member. Constitute. Further, a second jig is attached to one holding portion of the characteristic test apparatus that holds the device under test, and a third jig is attached to the other holding portion.

  When performing a torsion test, one end of the inner cylinder support member of the test object is attached to the third jig so that the cylinder axis of the rubber bush matches the relative rotation axis of the holding parts. While the first support portion supports the other holding portion, the outer peripheral support member in the DUT is supported on the one holding portion by the support arm of the second jig. Then, by twisting the holding portions relative to each other, a torsion load is applied to the rubber bush, and the torsional characteristics of the rubber bush are measured.

  On the other hand, when performing a rolling test, one end of the inner cylinder support member is supported by the second support part of the third jig so that the cylinder axis of the rubber bush is orthogonal to the relative rotation axis of the holding part. As in the previous case, the outer peripheral support member is supported by the second jig. Then, by rotating the holding portions relative to each other, a rolling load is applied to the rubber bush, and the rolling characteristics of the rubber bush are measured.

  That is, in the present invention, by combining the first to third jigs, the torsional characteristic test and the torsional characteristic test can be performed with a single characteristic test apparatus.

  In the second invention, the positioning operation can be further simplified. That is, according to the invention of claim 2, in the jig for the characteristic test apparatus according to claim 1, a long hole extending in the longitudinal direction is formed in the support arm of the second jig, and the long hole is inserted into the long hole. The fastener is fastened to a fixing portion provided on the outer periphery of the outer peripheral support member of the first jig, and the third jig is a flange portion that is overlapped with the other holding portion of the characteristic test apparatus In this flange portion, a bolt insertion hole for fastening it to the other holding portion is formed as a circumferential long hole around the relative rotation axis of the holding portion. It is what.

  With this configuration, when attaching the DUT (rubber bush with the first jig assembled) to the characteristic test apparatus, the fastener is slid along the long hole of the support arm of the second jig, The body position can be easily adjusted in the direction of the relative rotation axis. By rotating the third jig using the long hole of the flange portion, the position of the device under test can be easily adjusted around the relative rotation axis. Therefore, troublesome alignment can be easily performed together with the work of attaching the test object to the characteristic test apparatus.

  In 3rd and 4th invention, it can respond also to the rubber bush from which a dimension differs. That is, the invention of claim 3 is the jig for the characteristic test apparatus according to claim 1 or 2, wherein the second jig has its support arm as one holding portion of the characteristic test apparatus. In contrast, the base portion has a base portion that is supported radially away from the relative rotation shaft of the holding portion, and the base portion has a bolt insertion hole for fastening it to the one holding portion. It is formed as a long hole extending in the direction in which the relative rotation shaft of the portion and the support arm are separated from each other.

  According to a fourth aspect of the present invention, there is provided the characteristic test apparatus jig according to any one of the first to third aspects, wherein the second support portion of the third jig is the first jig. A pair of support arm portions that support the end portions of the inner cylinder support member, and a base end portion of each of the support arm portions, which are respectively supported by portions spaced radially from each other across the relative rotation shaft of the holding portion. A base portion, and a bolt insertion hole for fastening a base end portion of each support arm portion to the base portion is formed as a long hole extending in a direction in which the support arm portions are separated from each other. It is characterized by that.

  According to the third invention, since the second jig to be mounted on the holding portion of the characteristic test apparatus can be slidably fixed in the axial radial direction using the long hole, for example, the diameter of the rubber bush changes to a large or small size. Even so, the support arm of the second jig can be moved in the axial direction of the relative rotation shaft.

  Similarly, in the fourth invention, the distance between the support arm portions can be adjusted to be large or small by using the long hole formed in the base portion of the third jig. Even if the size changes, the inner cylinder support member of the first jig can be supported accordingly.

  In 5th invention, each support arm part of a 3rd jig | tool can be removed easily. That is, the invention according to claim 5 is the characteristic test apparatus jig according to claim 4, wherein the base part of the third jig has an opening that opens to the outer end of the base part in a continuous manner with the elongated hole. A support arm portion of the third jig is configured to be removable from the base portion while the bolt is attached by removing the bolt from the elongated hole through the opening. Features.

  According to such a configuration, each support arm portion can be removed from the base portion only by loosening the fastening state of the bolt. Therefore, in a torsional characteristic test that does not require a support arm, each support arm can be removed for measurement, and operations such as alignment are further simplified. Moreover, since it can be removed by loosening the bolt a little, it does not take time for the attaching / detaching operation and the bolt is not lost.

  As described above, according to the present invention, the torsional characteristic test and the torsional characteristic test can be carried out with a single characteristic test apparatus by combining the first to third jigs, and the man-hours required for both tests Reduction and measurement cost reduction can be achieved. In addition, it is easy to align, and even if the dimensions of the rubber bush are different, it can be handled by simple jig position adjustment, so that jigs can be shared, improving workability and reducing measurement costs. Reduction can be achieved.

  Hereinafter, the best embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a characteristic test apparatus equipped with a jig 1 for rubber bush B characteristic test apparatus of the present invention (hereinafter simply referred to as “jig 1”).

  The characteristic test apparatus includes a fixing device 101 fixed to the upper surface of the base 100 installed in a stable state, and a moving device 103 that can move in the horizontal direction by operating the handle 102. The fixed device 101 and the moving device 103 are installed opposite to each other in the moving direction of the moving device 103, and each device 101, 103 is equipped with an actuator, a torque detector, a motor, various control devices, and the like. (Not shown).

  Cylindrical holding portions 101a and 103a centering on a common relative rotation axis R protrude from opposing surfaces of both devices 101 and 103, and the peripheral portions of these opposing smooth end surfaces The bolt holes 105 are formed at eight positions along the axial circumferential direction of the relative rotation axis R at equal intervals (see FIG. 3B). At the time of the test, the jig 1 is attached to both the holding portions 101a and 103a using the bolt holes 105, and the rubber bush B is attached via the jig 1.

  Then, the other holding portion 103a (movable device side) rotates while the one holding portion 101a (fixing device side) is fixed, so that the rubber bush B is moved in the forward / reverse direction around the relative rotation axis R. Loads are alternately applied, and dynamic characteristics such as a dynamic spring constant are measured. Of course, the jig 1 can be used not only for measuring dynamic characteristics but also for measuring static characteristics such as the static spring constant of the rubber bush B and durability.

  The jig 1 includes a first jig 1a, a second jig 1b, and a third jig 1c, which are processed steel products. The first jig 1a is attached to the rubber bush B and constitutes a device under test. The second jig 1b is attached to the holding portion 101a on the fixing device 101 side, and the third jig 1c is attached to the holding portion 103a on the movable device 103 side. The second jig 1b supports the outer peripheral support member 3 of the first jig 1a that holds the outer cylinder 201 of the rubber bush B, and the third jig 1c holds the inner cylinder support member that holds the inner cylinder 200 of the rubber bush B. 2 is supported.

(First jig)
FIG. 2 shows the first jig 1a with the rubber bush B attached. As shown therein, the first jig 1a includes an inner cylinder support member 2 that is inserted and fixed to the inner cylinder 200 of the rubber bush B with both ends protruding, and an outer periphery support member that supports the outer periphery of the rubber bush B. 3.

  In addition, although the general rubber bush B provided with the outer cylinder 201 and the inner cylinder 200 as shown in FIG. 8 was illustrated here, the outer cylinder 201 is not necessarily essential, for example, the rubber bush B of only the inner cylinder 200 is used. It is also applicable to.

  The inner cylinder support member 2 includes a nut member 5 having a short cylinder shape and a bolt member 6 having a screw portion fastened and fixed to the nut member 5. A pair of fixing pieces 8 formed at the base end portion of the bolt member 6 is formed with a nut portion 7 having the same shape as the nut member 5 and a bolt hole 8a protruding from both sides of the end edge of the nut portion 7 and penetrating therethrough. , 8 are formed. By inserting the threaded portion of the bolt member 6 from one side of the inner cylinder 200 of the rubber bush B and fastening the nut member 5 to the threaded portion protruding to the opposite side, the inner cylinder supporting member 2 has both ends thereof inside. The rubber bush B is fixed integrally with the inner cylinder 200 while projecting from the cylinder 200.

  The outer peripheral support member 3 is composed of a pair of rectangular gripping bodies 9 and 9 to be butt-coupled. On the abutting surface of each gripping body 9, a gripping portion 10 having a circular arc cross section that grips the outer periphery of the rubber bush B is formed as a recess. By holding both the gripping bodies 9 and 9 in a state where the outer periphery of the rubber bush B is joined to the gripping portion 10, inserting a bolt 12 into the bolt hole 11 extending over the gripping bodies 9 and 9, and fastening with a nut 13 The outer cylinder 201 of the rubber bush B is gripped and fixed. A boss 15 (fixed portion) into which a fastener 25 (to be described later) is screwed is integrally provided at the center of the outer surface opposite to the abutting surface of one grip body 9.

(Second jig)
FIG. 3 shows the second jig 1b mounted on the holding unit 101a on the fixing device 101 side. As shown there, the second jig 1b includes a rectangular plate-like second jig body (base portion) 20 and a rectangular plate-like support arm 21 that extends in a vertical direction from one longitudinal end thereof. . The second jig body 20 is formed with a pair of first long holes 22 and 22 extending in the longitudinal direction, which are insertion holes for the bolts 27, separated from both sides. The support arm 21 is formed with one second long hole 23 that is opened by cutting off the distal end side toward the proximal end side. A fastener 25 is detachably attached to the second long hole 23, and the first jig 1a is supported by the second jig 1b via the fastener 25.

  In the second jig 1b, the second jig body 20 is superimposed on the end surface of the holding portion 101a with the support arm 21 facing the movable device 103 side. In this state, a bolt in which a washer is attached to the first long holes 22 and 22 of the second jig main body 20 extending in the longitudinal direction of the second jig main body 20 (the direction in which the relative rotation axis R and the support arm 21 are separated). 27 and 27 are inserted, and these bolts 27 are screwed into bolt holes 105 formed in the end face of the holding portion 101a, so that they are attached to the holding portion 101a. In a state where the second jig 1b is mounted on the holding portion 101a, the support arm 21 of the second jig 1b is supported by a portion spaced in the radial direction from the relative rotation axis R and formed on the support arm 21. The second long hole 23 is along the relative rotation axis R. Note that no special alignment is required for mounting the second jig 1b on the holding portion 101a.

(3rd jig)
FIG. 4 shows the third jig 1c mounted on the holding unit 103a on the movable device 103 side. As shown there, the third jig 1c has a flange portion 31 projecting in an annular shape outwardly from the peripheral edge of the base end of the cylindrical shaft portion 30, and a rectangular plate-like shape provided at the distal end of the shaft portion 30. It has a support base (base portion) 32 and a pair of support arm portions 33, 33 that are detachably supported by the support base 32.

  The flange portion 31 is formed with third elongated holes 35 extending in the axial circumferential direction, which are bolt insertion holes, at eight locations corresponding to the bolt holes 105 formed on the end surface of the holding portion 103a. In other words, the third long hole 35 is formed as a long hole in the circumferential direction around the relative rotation axis R of the holding portion 103a.

  A pair of fourth long holes 36, 36 extending in the longitudinal direction are formed side by side on both sides of the support base 32 except for the central portion in the longitudinal direction. As shown in Fig. 4, a total of four places are formed. In other words, each of the pair of fourth long holes 36 and 36 is formed long in a direction in which the support arm portions 33 and 33 are separated from each other. The support base 32 is also provided with an opening 37 that is continuous with the fourth elongated holes 36, 36,.

  Further, two through holes 38 of bolts for attaching the fixing pieces 8 of the first jig 1a are formed at two places in the center portion of the support base 32, whereby the first jig 1a is twisted. The 1st support part supported in a test position is comprised.

  Each support arm 33 is formed of a member having a rectangular plate shape as a whole, and bolt holes 40 into which bolts 39 are screwed in accordance with the fourth elongated holes 36 are opened at two base ends. ing. A receiving portion 41 for supporting and fixing the nut member 5 and the nut portion 7 of the inner cylinder support member 2 is formed on the distal end side of each support arm portion 33. The receiving portion 41 is composed of a pair of separable plate pieces that are butt-coupled, and a receiving groove 42 that fixes the nut member 5 and the nut portion 7 of the first jig 1a is formed in the butt surface of each plate piece. ing.

  In other words, each support arm portion 33 constitutes a second support portion that supports the first jig 1a at the rolling characteristic test position.

  In the third jig 1c, the support base 32 is directed to the fixing device 101 side, and the flange portion 31 on the opposite side is superimposed on the end surface of the holding portion 103a on the movable device 103 side. .. Are inserted into the holding portion 103a by being inserted into the bolt holes 105 on the end surface of the holding portion 103a. In a state where the third jig 1c is mounted on the holding portion 103a, the support arm portions 33 and 33 are supported by the support base 32 at portions spaced apart from each other in the radial direction with the relative rotation axis R interposed therebetween.

  Usually, the bolt 39 is screwed into the bolt hole 40 at the base end of each support arm portion 33. Then, by inserting the screw portion of the bolt 39 into the fourth elongated hole 36 from the opening portion 37 and tightening the bolt 39 further, each support arm portion 33 extends along the relative rotation axis R to the support base 32. Fixed to. If the bolt 39 is loosened and extracted from the opening 37, the support arm 33 can be easily removed from the support base 32.

  Next, an operation when the torsional characteristic test and the torsional characteristic test are sequentially performed using the jig 1 having such a configuration will be described with reference to FIGS. FIG. 5 is a view of the assembled state of the jig 1 during the torsional characteristic test as seen from the front direction, and FIG. 6 is a view of the assembled state of the jig 1 during the torsional characteristic test as viewed from the plane. is there. FIG. 7 shows a conventional measurement procedure, and FIG. 8 shows a measurement procedure in the present embodiment.

  First, the second jig 1b and the third jig 1c are first attached to the characteristic test apparatus (S1). Specifically, bolts 27 with washers are inserted into the first long holes 22 of the second jig body 20 of the second jig 1b, and the bolts 27 are temporarily inserted into the bolt holes 105 on the end surface of the holding portion 101a. Fasten and fix in a stop shape (see FIG. 3). Further, bolts are inserted into some of the third elongated holes 35 of the flange portion 32 of the third jig 1c, and the bolts are fastened and fixed in a bolted manner to the bolt holes 105 on the end surface of the holding portion 103a (see FIG. 4). ). Once the second jig 1b and the third jig 1c are attached to the characteristic test apparatus, they can be used without being removed even if the rubber bush B to be measured is changed thereafter. In FIG. 5, each support arm portion 33 of the third jig 1c is removed.

  Next, the rubber bush B to be measured is mounted on the first jig 1a to prepare a test object (S2). Specifically, as shown in FIG. 2, the inner cylinder support member 2 is inserted into the inner cylinder 200 of the rubber bush B and fastened and fixed. Then, the outer periphery of the rubber bush B is gripped by both gripping portions 10 of the outer peripheral support member 3 and fastened and fixed by bolts 12 and nuts 13.

  Subsequently, as shown in FIG. 5, the rubber jig B is attached and the first jig 1a constituting the test object is attached to the third jig 1c (S3). Specifically, a bolt is inserted into the bolt hole 8a of the fixing piece 8 of the bolt member 6 of the first jig 1a, and the bolt is inserted into the bolt hole 38 of the support base 32 of the third jig 1c. Fasten and fix. The bolt hole 8a and the bolt hole 38 of the fixing piece 8 are formed so that the cylinder axis r of the rubber bush B coincides with the relative rotation axis R only by fixing in advance.

  However, since the holding portion 103a rotates at the time of measurement, when the third jig 1c is mounted, the position of the bolt hole 105 formed on the end surface thereof is usually not constant around the relative rotation axis R. The position will be somewhat shifted, and the position of the outer peripheral support member 3 of the first jig 1a with the boss 15 will not match. Therefore, the flange portion 31 temporarily fixed with the bolt is rotated around the relative rotation axis R by using the third long hole 35 of the flange portion 31 of the third jig 1c to be aligned. At that time, the width dimension of the third long hole 35 is formed to be slightly larger than the shaft outer diameter of the bolt, so that the cylinder shaft r of the inner cylinder support member 2 and the relative rotation axis R rotate without being displaced. Therefore, alignment can be performed with confidence.

  Along with this work, the first jig 1a is attached to the second jig 1b (S4). Specifically, the position of the third jig 1c around the relative rotation axis R is adjusted, and the second jig 1b is slid until the lower surface of the support arm 21 comes into contact with the upper surface of the boss 15 of the first jig 1a. Then, the fastener 25 attached to the support arm 21 of the second jig 1b is screwed into the boss 15 and firmly fixed.

  At this time, the second jig 1b is slidable in the axial radial direction of the relative rotation axis R through the first elongated hole 22, and the fastener 25 is axially disposed in the relative rotation axis R through the second elongated hole 23. Therefore, the positioning can be easily performed by the combination with the rotation of the third jig 1c by the third long hole 35. And while aligning the outer periphery supporting member 3, each bolt is finally tightened, the jig | tool 1 is fastened and fixed to a characteristic test apparatus, and a torsion characteristic is measured (S5).

  On the other hand, in the conventional measurement procedure, as shown in FIG. 7, the jig for measuring the torsional characteristics dedicated to the rubber bush is mounted on each of the holding portions 101a and 103a on the fixed side and the rotating side (S11). The rubber bush B is attached to the rotation side jig (S12), and the position of the fixed side jig is adjusted accordingly (S13). After that, after attaching the rubber bush B to the fixed jig (S14), the torsional characteristics are measured (S15).

  That is, in the past, it was necessary to search for a dedicated jig from among a large number of jigs and change the jig for each rubber bush, but in this embodiment, once the jig 1 is mounted. For example, it is not necessary to change the position, and a torsional characteristic test can be performed by simple positioning.

  After the measurement of torsional characteristics, the test for torsional characteristics is performed. In the present embodiment, it is possible to shift to the rolling characteristic test by an extremely simple operation of simply changing the mounting state of the first jig 1a so that the cylinder axis r of the rubber bush B is orthogonal to the relative rotation axis R. it can.

  Specifically, for example, the fastening state of the fastener 25, the boss 15 and the support arm 21 is loosened, and the outer peripheral support member 3 of the first jig 1a is attached to the second jig 1b by the fastener 25. The inner cylinder support member 2 is removed from the third jig 1c. Then, the rubber bush B and the first jig 1a are rotated sideways around the fastener 25 as a support shaft. Of course, the first jig 1a may be once removed from the second jig 1b. In that case, since the 2nd long hole 23 is notched and formed, it is also possible to remove from the 2nd jig | tool 1b, attaching the fastener 25 to the 1st jig | tool 1a.

  Then, as shown in FIG. 6, a pair of support arm portions 33, 33 are attached to the support base 32 of the third jig 1c (see FIG. 4), and the nut member 5 and the nut portion 7 of the first jig 1a The mounting position of each support arm portion 33 is adjusted in a state in which each of the receiving portions 41 is received in the receiving groove 42, and the fastener 25 and each bolt are fastened and fixed (S6), and then the twist characteristics are measured (S7). . The support arm 33 can be easily attached to and detached from the support base 32 using the opening 37, and the positioning can be easily performed by the combination of the fourth elongated hole 36 and the second elongated hole 23. You can do it in time.

  When repeating the measurement, the rubber bush B to be measured is replaced and the previous steps S2 to S7 are repeated. At that time, even if the length and width of the rubber bush B to be measured are different, it can be dealt with by simply adjusting the mounting position using the first to third jigs 1a, 1b and 1c as they are.

  On the other hand, in the conventional measurement procedure, as shown in FIG. 7, first, the rubber bush B and the torsion measurement jig are removed from the characteristic test apparatus (S16), and the torsion characteristic measurement jig dedicated to the rubber bush is provided. Using the same procedure as the previous torsional property test, the twisting property is measured (S17 to S21). For this reason, the number of work steps is large, and the troublesome work has to be repeated. If the length and width of the rubber bush to be measured are different, it is necessary to find and replace a dedicated jig from the beginning, which is a very complicated operation.

  On the other hand, in the present embodiment, by using the first to third jigs 1a, 1b, and 1c, the torsional characteristic test and the torsional characteristic test can be performed with a single characteristic test apparatus, and alignment is easy. Thus, even if the rubber bush dimensions are different, it can be dealt with by simple position adjustment.

  As described above, when the jig 1 of the present invention is used, the rubber bush characteristic test can be performed much more efficiently than before, and the workability can be improved and the measurement cost can be reduced.

  In addition, the structure of the jig | tool 1 concerning this invention is not limited to the said embodiment, Various structures other than that are included. That is, the number of fixing portions (bosses) 15 provided on the outer periphery of the outer peripheral support member 3 of the first jig 1a is not limited to one, and a plurality of fixing portions (bosses) 15 may be provided. For example, in the above-described embodiment, if another same boss is provided in the direction perpendicular to the boss 15, the third jig 1c is rotated to align the third jig 1c to the holding portion 103a. In doing so, since a boss that can be easily positioned with respect to the fastener 25 of the second jig 1b can be selected and used, the position adjustment is further simplified.

  The support arm portion 33 of the third jig 1 c may be configured integrally with the support base 32.

  In the previous embodiment, the second jig 1b is fixed to the holding portion 101a via the first long hole 22, but it can be configured as follows instead. That is, the support arm 21 and the second jig body 20 are configured separately, and a long hole extending along the longitudinal direction is formed on one side of the second jig body 20 on both sides. Bolts are inserted into these long holes and fastened to bolt holes formed in the base of the support arm 21 so that the support arm 21 is slidably attached to the second jig body 20 in the longitudinal direction. Then, a plurality of bolt holes corresponding to the bolt holes 105 of the holding portion 101a are formed on the other end side of the second jig main body 20, and the second jig 1b is fastened and fixed to the holding portion 101a using the bolt holes. . Also with this configuration, the support arm 21 can be slid in the radial direction of the relative rotation axis R, and the position can be adjusted according to the difference in the width dimension of the rubber bush B.

It is a front view which shows the characteristic test apparatus with which the jig | tool of this invention was mounted | worn. (A) is a side view of the 1st jig | tool with which the rubber bush was attached, (b) is an arrow XX sectional drawing in (a). (A) is a front view of the 2nd jig | tool with which the holding | maintenance part was mounted | worn, (b) is the side view seen from the arrow Y direction in (a). (A) is a front view of the 3rd jig | tool with which the holding | maintenance part was mounted | worn, (b) is the side view seen from the arrow Z direction in (a). It is a front view which shows the assembly | attachment state of each jig | tool in a torsion characteristic test. It is a top view which shows the assembly | attachment state of each jig | tool in the rolling characteristic test. It is a flowchart which shows the measurement procedure in this Embodiment. It is a flowchart which shows the conventional measurement procedure. It is a figure for demonstrating the structure of a general rubber bush, (a) is a side view, (b) is the arrow WW sectional view taken on the line in (a).

Explanation of symbols

B Rubber bush R Relative rotation shaft r Tube shaft 1a First jig 1b Second jig 1c Third jig 2 Inner tube support member 3 Outer periphery support member 15 Fixed portion 20 Second jig body (base portion)
21 Support arm 25 Fastener 31 Flange part 32 Support base (base part)
33 Supporting arm part 37 Opening part 101a, 103a Holding part

Claims (5)

A jig for a characteristic test apparatus for holding a rubber bush between a pair of opposing holding portions and rotating the holding portions relative to each other around a predetermined axis to test the dynamic characteristics of the rubber bush. ,
A first jig having an inner cylinder support member that is inserted and fixed to an inner cylinder of the rubber bush with both ends protruding, and an outer periphery support member that supports the outer periphery of the rubber bush;
A second jig that is attached to one holding portion of the characteristic test apparatus and supports the outer peripheral support member by a support arm that extends toward the other holding portion;
A third jig that is mounted on the other holding portion and supports the inner cylinder support member;
With
The third jig is
A first support part that supports one end of the inner cylinder support member so that a cylinder axis of the rubber bush matches a relative rotation axis of the holding part;
A second support part that supports both ends of the inner cylinder support member so that the cylinder axis of the rubber bush is orthogonal to the relative rotation axis;
A rubber bushing characteristic test apparatus jig characterized by comprising: In the jig for a characteristic test apparatus according to claim 1,
A long hole extending in the longitudinal direction is formed in the support arm of the second jig, and a fastener inserted through the long hole is attached to a fixing portion provided on the outer periphery of the outer peripheral support member of the first jig. Has been concluded,
The third jig has a flange portion that is overlapped with the other holding portion of the characteristic test apparatus, and the flange portion has a bolt insertion hole that fastens it to the other holding portion. Rubber bushing characteristic test device jig formed as a circumferential long hole around the relative rotation axis of the part. In the jig for a characteristic test apparatus according to claim 1 or 2,
The second jig has a base portion that supports the supporting arm at a portion spaced radially from the relative rotation axis of the holding portion with respect to one holding portion of the characteristic test apparatus,
A rubber bushing in which a bolt insertion hole for fastening it to the one holding part is formed in the base part as a long hole extending in a direction in which the relative rotation shaft of the holding part and the support arm are separated from each other. Jig for characteristic testing equipment. In the jig for a characteristic test apparatus according to any one of claims 1 to 3,
The second support portion of the third jig includes a pair of support arm portions that respectively support end portions of the inner cylinder support member of the first jig, and a base end portion of each of the support arm portions. And a base portion that supports the portions spaced radially from each other across the relative rotation axis of
For the rubber bush characteristic test apparatus, the base part has a bolt insertion hole for fastening the base end part of each support arm part to the base part as a long hole extending in the separating direction of the support arm parts. jig. In the jig for a characteristic test apparatus according to claim 4,
The base portion of the third jig is provided with an opening portion that opens to the outer end of the base portion in connection with the long hole.
The rubber bush characteristic testing device is configured such that the support arm portion of the third jig is configured to be removable from the base portion while the bolt is attached by removing the bolt from the elongated hole through the opening. Jig.

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