JP2014206464A - Tire testing device and tire testing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform a highly accurate test.SOLUTION: A tire testing device 10 comprises: an upper base member 11 and a lower base member 12 that are arranged to be spaced at an interval in a vertical direction; load measurement means 13 that is placed between the base members 11 and 12, and measures a load acting from above; support means 14 that has a tire T pressed on the upper base member 11, and supports the upper base member 11 so as to be capable of displacing the upper base member 11 downward; and regulation means 15 that regulates a relative displacement in forward and rearward directions of the tire T between both base members 11 and 12 and in right and left directions B therebetween. The support means 14 includes a connecting member 16 that connects both base members 11 and 12 and is elastically deformable in the upper and lower directions.

Description

  The present invention relates to a tire testing apparatus and a tire testing method.

  Conventionally, for example, a tire test apparatus as shown in the following Patent Document 1 is known. As this type of tire test apparatus, an upper base member and a lower base member arranged at intervals in the vertical direction, and these There is known a configuration including a load measuring unit that is disposed between the two base members and measures a load acting from above. In the tire test method using this tire test apparatus, the load acting on the load measuring means is measured after the lower base member is moved in the left-right direction or the front-rear direction of the tire with the tire pressed against the upper base member. Perform the measurement process. At this time, the load from the tire is measured by the load measuring means, and then the tire is tested based on the measurement result.

Japanese Utility Model Publication No. 55-86940

However, in the conventional tire testing apparatus, not only the load from the tire but also the load of the upper base member itself acts on the load measuring means, so that the load acting on the load measuring means tends to increase. Further, during the measurement step, the upper base member is displaced in the front-rear direction and the left-right direction with respect to the lower base member. Therefore, in addition to the load from above, the front-rear force that is the force in the front-rear direction Lateral force, which is a lateral force, was also acting.
As described above, the load acting on the load measuring means tends to be large, and since the longitudinal force and the lateral force act on the load measuring means, it is difficult to accurately measure the load from the tire by the load measuring means, It was difficult to conduct a highly accurate test.

  The present invention has been made in view of the above-described circumstances, and an object thereof is to provide a tire testing apparatus capable of performing a highly accurate test.

In order to solve the above problems, the present invention proposes the following means.
A tire testing apparatus according to the present invention includes an upper base member and a lower base member that are spaced apart in the vertical direction, and a load measuring means that is disposed between the two base members and measures a load acting from above. And a tire testing device in which a tire is pressed onto the upper base member, the supporting means for supporting the upper base member so as to be displaceable downward, and the front-rear direction of the tire of both the base members and Restricting means for restricting relative displacement in the left-right direction, and the supporting means comprises a connecting member that connects the base members and is elastically deformable in the up-down direction.

  Further, the tire test method according to the present invention is a tire test method using the tire test apparatus, and the lower base member is moved in the left-right direction or the front-rear direction with the tire pressed against the upper base member. And a measuring step of measuring a load acting on the load measuring means.

In these inventions, when the tire is pressed onto the upper base member during the measurement process, the connecting member is elastically deformed in the vertical direction, the upper base member is displaced downward, and the load from the tire is increased by the upper base member. It acts on the load measuring means via Then, after the lower base member is moved in the left-right direction or the front-rear direction together with the upper base member in a state where the relative displacement in the front-rear direction and the left-right direction of both base members is restricted by the restricting means, it acts on the load measuring means. Measure the load to be applied.
After that, when the pressing on the upper base member of the tire is released, the upper base member is restored and displaced upward by the elastic restoring force of the connecting member.

As described above, since the connecting member is elastically deformed in the vertical direction, the supporting means displaces the upper base member downward, so that the load from the tire is applied to the load measuring means during the measurement process, and the upper base is moved. The load of the member itself can be received by the support means, and the load of the upper base member itself can be suppressed from acting on the load measuring means.
In addition, since the restricting means restricts the relative movement of both base members in the front-rear direction and the left-right direction, the relative displacement of both base members in the front-rear direction and the left-right direction is restricted by the restricting means during the measurement process. In this state, it becomes possible to move the lower base member in the left-right direction or the front-rear direction together with the upper base member, and it is possible to suppress the application of a longitudinal force or a lateral force to the load measuring means.
As described above, during the measurement process, the load from the tire can be accurately measured by the load measuring means, and a highly accurate test can be performed.

  Further, in the tire testing apparatus according to the present invention, a plurality of the connecting members are arranged in a circumferential direction along a reference axis extending in a vertical direction through a portion where the tire is pressed on the upper base member, The member includes a pair of fixed bases that are separately fixed to the base members, and an elastic deformation portion that extends in a radial direction perpendicular to the reference axis and connects the pair of fixed bases. The bending rigidity in the circumferential direction of the deforming part may be larger than the bending rigidity in the vertical direction of the elastic deforming part.

In this case, when the tire is pressed onto the upper base member during the measurement process, the connecting member is elastically deformed in the vertical direction by the elastic deformation portion of the connecting member being bent in the vertical direction.
Here, since the bending rigidity in the circumferential direction of the elastic deformation portion is larger than the bending rigidity in the vertical direction of the elastic deformation portion, the elastic deformation portion of the connecting member is removed when the tire is pressed onto the upper base member. Thus, it is possible to easily bend and deform in the vertical direction while suppressing deformation in the circumferential direction. This makes it possible to stably displace the upper base member downward, coupled with the fact that a plurality of connecting members are arranged in the circumferential direction, and the load measuring means can more accurately load the tire. It can be measured well.

  In the tire testing device according to the present invention, the elastic deformation portion may be formed in a plate shape integral with the pair of fixed base portions.

  In this case, since the elastically deforming portion is formed in a plate shape integral with the pair of fixed base portions, the upper base member can be further stably displaced downward, and the load measuring means can load the upper and lower directions. Can be measured with higher accuracy.

  In the tire testing apparatus according to the present invention, the connecting member may be provided as a pair of left and right so as to sandwich the reference shaft in the left-right direction, and may be provided as a pair of front and rear so as to sandwich the reference shaft in the front-rear direction. .

  In this case, a pair of connecting members are provided on the left and right sides so as to sandwich the reference axis in the left-right direction, and a pair of front and rear sides are provided so as to sandwich the reference axis in the front-rear direction. It can be supported separately from both sides in the direction and both sides in the front-rear direction. As a result, it is possible to suppress the upper base member from swinging around the front and rear roll shafts extending in the front and rear direction and the left and right roll shafts extending in the left and right directions, and a more accurate test can be performed.

When the elastically deforming portion is formed in a plate shape integral with the pair of fixed base portions, the pair of connecting members are provided in the front-rear direction so as to sandwich the reference shaft in the front-rear direction, so that both base members are When it is going to displace relatively to a direction, it can make it easy to make each elastic deformation part of these connecting members receive the longitudinal force which acts on a pair of front and rear connecting members. Further, in this case, a pair of connecting members are provided so as to sandwich the reference axis in the left-right direction, so that when both the base members are to be displaced relatively in the left-right direction, they act on the pair of left and right connecting members. The lateral force can be easily received by the elastically deforming portions of these connecting members.
As described above, the longitudinal force acting on the pair of front and rear connecting members and the lateral force acting on the pair of left and right connecting members can be easily received by the elastically deforming portions of these connecting members. It can suppress reliably that a member displaces relatively in the front-back direction or the left-right direction.

  Moreover, in the tire testing apparatus according to the present invention, the restricting means includes first restricting means for restricting relative displacement in the left-right direction of the base members, and the first restricting means includes the pair of left and right connections. A pair of left and right first engaging members that sandwich the member from the outer side in the left-right direction and are opposed to the fixed base from the outer side in the left-right direction are provided. The first restricting means includes the first engaging member and the first engaging member. Relative displacement of the base members in the left-right direction may be restricted by engaging the fixed base portion facing the joint member in the left-right direction.

In this case, the first restricting member engages with the first engaging member and the fixed base portion of the connecting member facing the first engaging member in the left-right direction, so that the first restricting means is moved in the left-right direction of both base members. Since the relative displacement is regulated, for example, the structure of the tire testing device can be simplified as compared with a case where a member that engages with the first engagement member is separately provided.
Further, the first engaging member and the fixed base of the connecting member facing the first engaging member in the left-right direction are engaged with each other, so that the first restricting means is relative to the both base members in the left-right direction. Therefore, for example, the first engagement member reliably restricts the relative displacement in the left-right direction of both base members as compared with the case where the first engagement member engages with the elastic deformation portion of the connecting member. The upper base member can be reliably and stably displaced downward, and the load in the vertical direction can be reliably measured with higher accuracy by the load measuring means.

  In the tire testing apparatus according to the present invention, the first engagement member is formed to open toward the outer side in the left-right direction at the fixed base portion facing the first engagement member in the left-right direction. Moreover, the 1st nail | claw part which approachs in the 1st ditch | groove part may be protrudingly provided toward the inner side of the left-right direction.

  In this case, since the first claw portion has entered the first groove portion, the first base portion is brought into contact with the inner wall surface of the first groove portion when the upper base member swings around the front-rear roll axis. It becomes possible to regulate by making it possible to perform a test with even higher accuracy.

  In the tire testing apparatus according to the present invention, the restricting means includes second restricting means for restricting relative displacement of the base members in the front-rear direction, and the second restricting means includes the pair of front and rear connecting members. A member is sandwiched from outside in the front-rear direction, and includes a pair of front and rear second engaging members facing the fixed base from outside in the front-rear direction. The second restricting means includes the second engaging member and the second engaging member. The relative displacement of the base members in the front-rear direction may be restricted by engaging the fixed base portion facing the joint member in the front-rear direction.

In this case, the second restricting member engages with the second engaging member and the fixed base portion of the connecting member facing the second engaging member in the front-rear direction, so that the second restricting means is moved in the front-rear direction of both base members. Since the relative displacement is restricted, for example, the structure of the tire testing apparatus can be simplified as compared with a case where a member that engages with the second engagement member is separately provided.
Further, the second engaging member and the fixed base of the connecting member facing the second engaging member in the front-rear direction are engaged with each other, so that the second restricting means is relative to the base member in the front-rear direction. For example, the second engagement member reliably restricts the relative displacement in the front-rear direction of both base members as compared with the case where the second engagement member engages with the elastic deformation portion of the connecting member. The upper base member can be reliably and stably displaced downward, and the load in the vertical direction can be reliably measured with higher accuracy by the load measuring means.

  In the tire testing device according to the present invention, the second engagement member is formed to open outward in the front-rear direction at the fixed base portion facing the second engagement member in the front-rear direction. In addition, the second claw portion that enters the second concave groove portion may project toward the inner side in the front-rear direction.

  In this case, since the second claw portion has entered the second concave groove portion, the upper base member swings around the left and right roll shafts, and the second claw portion contacts the inner wall surface of the second concave groove portion. It becomes possible to regulate by making it possible to perform a test with even higher accuracy.

  According to the present invention, a highly accurate test can be performed.

It is a front view of a tire test system provided with a tire test device concerning one embodiment of the present invention. It is a top view of the tire test apparatus shown in FIG. It is a longitudinal cross-sectional view of the principal part of the tire testing apparatus shown in FIG.

Hereinafter, a tire test system including a tire test apparatus according to an embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, a tire test system 1 includes a tire holding device 2 that holds a tire T via a rim R, a tire test device 10 against which the tire T is pressed, and a moving device that moves the tire test device 10. 3 is provided.

The tire holding device 2 holds the tire T in a state in which the tire axis O1 is positioned on a horizontal plane and moves the tire T forward and backward. Hereinafter, of the directions along the horizontal plane, the direction orthogonal to the tire axis O1 is referred to as the front-rear direction A of the tire T, and the direction parallel to the tire axis O1 is referred to as the left-right direction B of the tire T.
The moving device 3 includes a moving table portion 3a to which the tire testing device 10 is fixed on an upper surface extending in parallel with a horizontal plane, and an advancing / retreating mechanism (not shown) for moving the moving table portion 3a in the left-right direction B. Yes.

  The tire testing apparatus 10 includes an upper base member 11 and a lower base member 12 that are arranged at intervals in the vertical direction, and a load that is arranged between the two base members 11 and 12 and measures a load acting from above. Measuring means 13, supporting means 14 for supporting the upper base member 11 so as to be displaceable downward, and restricting means 15 for restricting relative displacement of the base members 11 and 12 in the front-rear direction A and the left-right direction B. I have.

The upper base member 11 and the lower base member 12 are formed in a plate shape extending in both the front-rear direction A and the left-right direction B, and have the same shape and size. As shown in FIG. 2, the upper base member 11 and the lower base member 12 include a pair of first side portions extending in the front-rear direction A and the left and right sides in a plan view of the tire testing apparatus 10 as viewed from above. A square shape having a pair of second sides extending in the direction B is formed.
As shown in FIG. 1, the lower base member 12 is fixed to the upper surface of the moving table 3 a of the moving device 3. The tire T is pressed onto the upper base member 11, and in the present embodiment, the tire is applied to the center portion of the upper base member 11 in the front-rear direction A and the left-right direction B (the portion where the tire is pressed in the upper base member). T is pressed.

The support means 14 includes a connecting member 16 that connects the base members 11 and 12 and is elastically deformable in the vertical direction. As shown in FIG. 2, a plurality of connecting members 16 are arranged in the circumferential direction along the reference axis O <b> 2 extending in the up-down direction through the central portions in the front-rear direction A and the left-right direction B of the upper base member 11. Yes. The plurality of connecting members 16 are formed in the same shape and size.
As shown in FIG. 3, the connecting member 16 extends in a radial direction perpendicular to the reference axis O2 and a pair of fixed base portions 16a and 16b fixed to the base members 11 and 12 separately. And an elastic deformation portion 16c that connects the base portions 16a and 16b. The pair of fixed base portions 16a and 16b and the elastic deformation portion 16c in each connecting member 16 have the same size and position in the circumferential direction.

  The pair of fixed base portions 16a and 16b are formed in a rectangular parallelepiped shape that is long in the circumferential direction, and are shifted from each other in the radial direction. Of the pair of fixed base portions 16 a and 16 b, the lower fixed base portion 16 a fixed to the lower base member 12 is positioned on the outer side in the radial direction than the upper fixed base portion 16 b fixed to the upper base member 11. Vertical gaps are provided between the lower fixed base portion 16a and the upper base member 11 and between the upper fixed base portion 16b and the lower base member 12, respectively. The lower fixed base portion 16a is larger in the vertical direction and the radial direction than the upper fixed base portion 16b.

The lower fixed base portion 16a is fixed to the lower base member 12 with bolts. The bolt is inserted into an insertion hole formed in the lower fixed base portion 16a from above and then screwed into a screw hole formed in the lower base member 12. The head portion of the bolt is inserted into the lower fixed base portion 16a. It is accommodated in the hole.
The upper fixed base portion 16b is also fixed to the upper base member 11 with bolts. The bolt is inserted into the insertion hole formed in the upper base member 11 from above, and then screwed into the screw hole formed in the upper fixing base portion 16b. The head of the bolt is inserted into the insertion hole of the upper base member 11. It is accommodated in the hole.

  Both ends in the radial direction of the elastic deformation portion 16c are connected to a pair of fixed base portions 16a and 16b, respectively, and the radially outer end portion of the elastic deformation portion 16c is connected to the lower fixed base portion 16a. The inner end portion in the radial direction at 16c is connected to the upper fixed base portion 16b. The elastic deformation portion 16c connects the upper end of the inner surface facing the radially inner side in the lower fixed base portion 16a and the lower end of the outer surface facing the outer radial direction in the upper fixed base portion 16b.

  The bending rigidity in the circumferential direction of the elastic deformation portion 16c is larger than the bending rigidity in the vertical direction of the elastic deformation portion 16c, and the elastic deformation portion 16c is formed in a plate shape integral with the pair of fixed base portions 16a and 16b. Has been. The front and back surfaces of the elastic deformation portion 16c are orthogonal to the vertical direction and extend along both the radial direction and the circumferential direction. The size of the elastic deformation portion 16c along the radial direction is larger than the size of the pair of fixed base portions 16a and 16b along the radial direction. The size along the vertical direction of the elastic deformation portion 16c is smaller than the size along the vertical direction of each of the pair of fixed base portions 16a and 16b. The elastic deformation portion 16c is a so-called flexure (leaf spring) formed integrally with the pair of fixed base portions 16a and 16b.

  Here, as shown in FIG. 2, a pair of connecting members 16 are provided so as to sandwich the reference axis O2 in the left-right direction B, and a pair of front and rear are provided so as to sandwich the reference axis O2 in the front-rear direction A. . The pair of left and right connecting members 16 are arranged symmetrically in the left-right direction B with respect to the reference axis O2, and the positions in the front-rear direction A are equal. The pair of front and rear connecting members 16 are arranged symmetrically in the front-rear direction A with respect to the reference axis O2, and the positions in the left-right direction B are equal.

The restricting means 15 is a first restricting means 17A that restricts the relative displacement of the base members 11 and 12 in the left-right direction B, and a second restricting means that restricts the relative displacement of the base members 11 and 12 in the front-rear direction A. Restriction means 17B.
The first restricting means 17A includes a pair of left and right first engaging members 18A that sandwich the pair of left and right connecting members 16 from the outside in the left and right direction B. As shown in FIG. 3, the first engaging member 18 </ b> A faces the lower fixed base 16 a in each of the pair of left and right connecting members 16 from the outside in the left-right direction B, and is in close proximity or in contact therewith. The first engagement member 18 </ b> A is formed in a rectangular parallelepiped shape extending in the front-rear direction A, and is fixed to the upper base member 11. There is a vertical gap between the first engagement member 18 </ b> A and the lower base member 12.

  In the first engagement member 18A, in the first recessed groove portion 19A formed so as to open toward the outside in the left-right direction B on the lower fixed base portion 16a facing the first engagement member 18A in the left-right direction B. The first claw portion 20 </ b> A that enters into the left side protrudes inward in the left-right direction B. The first claw portion 20A is formed integrally with the first engagement member 18A, and protrudes from the lower end portion of the first engagement member 18A toward the inner side in the left-right direction B. The first claw portion 20A is disposed so as to be shifted upward in the first concave groove portion 19A, and the vertical distance between the upper surface of the first claw portion 20A and the inner wall surface of the first concave groove portion 19A is first. It is narrower than the vertical distance between the lower surface of the claw portion 20A and the inner wall surface of the first concave groove portion 19A. The first concave groove 19A is open on both sides in the front-rear direction A.

  As shown in FIG. 2, the second restricting means 17 </ b> B includes a pair of front and rear second engaging members 18 </ b> B that sandwich the pair of front and rear connecting members 16 from the outside in the front-rear direction A. As shown in FIG. 3, the second engagement member 18 </ b> B faces the lower fixed base portion 16 a in each of the pair of front and rear connection members 16 from the outside in the front-rear direction A, and is in close proximity or in contact therewith. The second engagement member 18 </ b> B is formed in a rectangular parallelepiped shape extending in the left-right direction B, and is fixed to the upper base member 11. There is a vertical gap between the second engagement member 18 </ b> B and the lower base member 12.

  In the second engaging member 18B, in the second recessed groove portion 19B formed so as to open toward the outside in the front-rear direction A on the lower fixed base portion 16a facing the second engaging member 18B in the front-rear direction A. The 2nd nail | claw part 20B which approachs is protruded toward the inner side of the front-back direction A. The 2nd nail | claw part 20B is shape | molded integrally with the 2nd engagement member 18B, and is protrudingly provided toward the inner side of the front-back direction A from the lower end part of the 2nd engagement member 18B. The second claw portion 20B is arranged to be shifted upward in the second concave groove portion 19B, and the vertical distance between the upper surface of the second claw portion 20B and the inner wall surface of the second concave groove portion 19B is second. It is narrower than the vertical distance between the lower surface of the claw portion 20B and the inner wall surface of the second concave groove portion 19B. The second groove 19B is open on both sides in the left-right direction B.

  The first engaging member 18A and the second engaging member 18B are fixed to the upper base member 11 with bolts. The bolt is inserted into the insertion hole formed in the upper base member 11 from above, and then screwed into the screw hole formed in each of the engaging members 18A and 18B. In the insertion hole.

  As shown in FIG. 2, four load measuring means 13 are arranged at equal intervals in the circumferential direction. The load measuring means 13 is located on the same circumference centered on the reference axis O2, and is disposed between the plurality of connecting members 16 adjacent to each other in the circumferential direction. The four load measuring means 13 are arranged corresponding to the four corners of the upper base member 11 and the lower base member 12 in the plan view.

  Of the four load measuring means 13, the two load measuring means 13 located on one side in the front-rear direction A have the same position in the front-rear direction A, and the two load measuring means 13 located on the other side in the front-rear direction A The load measuring means 13 are also at the same position in the front-rear direction A. The load measuring means 13 located on one side in the front-rear direction A and the load measuring means 13 located on the other side are separated by a distance L (hereinafter referred to as a separation distance L) in the front-rear direction A. Of the four load measuring means 13, the two load measuring means 13 located on one side in the left-right direction B have the same position in the left-right direction B, and the two load measuring means 13 located on the other side in the left-right direction B The positions of the load measuring means 13 in the left-right direction B are also equal. The load measuring means 13 located on one side in the left-right direction B and the load measuring means 13 located on the other side are separated by the separation distance L in the left-right direction B.

  As shown in FIG. 1, the load measuring means 13 is constituted by, for example, a strain gauge type load cell, and sends a measurement result to a control unit (not shown). The force applying portion 13 a of the load measuring means 13 constitutes the upper end portion of the load measuring means 13 and is in contact with the lower surface of the upper base member 11. The load of the upper base member 11 itself is received by the support means 14, and the load of the upper base member 11 itself does not substantially act on the load measuring means 13.

  In the tire testing method using the tire testing apparatus 10, for example, a state in which a lateral force is input in the left-right direction B from the road surface in a heavy-load tire T such as an aircraft tire is reproduced, and based on the measurement result of the load measuring unit 13. The positions of the center of gravity of the tire T in the left-right direction B and the front-rear direction A are detected. In the case of aircraft tires, for example, lateral force is input when the aircraft takes off and landing or when the aircraft turns around on the ground.

  In this tire test method, after the lower base member 12 is moved in the left-right direction B with the tire T pressed against the upper base member 11, a measurement process is performed in which the load acting on the load measuring means 13 is measured. . In this step, first, the tire holding device 2 presses the tire T onto the upper base member 11 of the tire testing device 10 to apply a load of about 784 kN (80 tf) at the maximum to the tire T, for example. Then, the elastic deformation portion 16c of the connecting member 16 is bent and deformed in the vertical direction, and the connecting member 16 is elastically deformed in the vertical direction, whereby the upper base member 11 is displaced downward, and the load from the tire T is increased by the upper base member. 11 acts on the load measuring means 13 via 11.

Then, by moving the moving base 3a of the moving device 3 in the left-right direction B in a state where the relative displacement in the front-rear direction A and the left-right direction B of both the base members 11, 12 is restricted by the restricting means 15. The lower base member 12 is moved in the left-right direction B together with the upper base member 11.
Here, the first restricting means 17A is configured so that the first engaging member 18A and the lower fixed base portion 16a facing the first engaging member 18A in the left-right direction B are engaged with each other. 12 relative displacements in the left-right direction B are regulated. For example, the displacement of the upper base member 11 in the left-right direction B relative to the lower base member 12 is such that one of the pair of left and right first engaging members 18A located on the other side in the left-right direction B is the lower fixed base 16a. It is regulated by engaging with.
Further, the second restricting means 17B is configured so that the second engaging member 18B and the lower fixed base portion 16a facing the second engaging member 18B in the front-rear direction A are engaged with each other, whereby both the base members 11, 12 are engaged. The relative displacement in the front-rear direction A is regulated. For example, the displacement of the upper base member 11 to the lower base member 12 in the front-rear direction A is such that the lower fixed base portion 16a is located on the other side in the front-rear direction A of the pair of front and rear second engaging members 18B. It is regulated by engaging with.

After the lower base member 12 is moved as described above, the measurement process is completed by measuring the load acting on the load measuring means 13.
After that, when the pressing of the tire T onto the upper base member 11 is released, the upper base member 11 is restored and displaced upward by the elastic restoring force of the connecting member 16.

  After the measurement process, a detection process for detecting each position of the center of gravity of the tire T in the left-right direction B and the front-rear direction A based on the measurement result measured by the load measuring means 13 is performed. In the present embodiment, for example, as the respective positions in the left-right direction B and the front-rear direction A of the center of gravity of the tire T, the positional deviation amounts of the center of gravity of the tire T in the left-right direction B and the front-rear direction A from the reference axis O2 are as follows. It calculates using (1) Formula and following (2) Formula. In addition, L in each formula means the separation distance L.

As described above, according to the tire test apparatus 10 and the tire test method according to the present embodiment, the connecting member 16 is elastically deformed in the vertical direction, so that the support means 14 displaces the upper base member 11 downward. In the measurement process, the load from the tire T is applied to the load measuring means 13, and the load of the upper base member 11 itself can be received by the support means 14. It can suppress acting on the measuring means 13.
Further, since the restricting means 15 restricts the relative movement of the base members 11 and 12 in the front-rear direction A and the left-right direction B, the restricting means 15 causes the front-rear direction A and the base members 11 and 12 to move in the measurement process. The lower base member 12 can be moved in the left-right direction B or the front-rear direction A together with the upper base member 11 in a state in which the relative displacement in the left-right direction B is restricted. It can suppress the force being applied.
As described above, during the measurement process, the load from the tire T can be measured with high accuracy by the load measuring means 13, and a highly accurate test can be performed.

Further, since the bending rigidity in the circumferential direction of the elastic deformation portion 16c is larger than the bending rigidity in the vertical direction of the elastic deformation portion 16c, when the tire T is pressed against the upper base member 11, the connecting member 16 The elastic deformation portion 16c can be easily bent and deformed in the vertical direction while suppressing deformation in the circumferential direction. Accordingly, in combination with the plurality of connecting members 16 arranged in the circumferential direction, the upper base member 11 can be stably displaced downward, and the load measuring means 13 can remove the tire T from the tire T. The load can be measured with higher accuracy.
Further, since the elastic deformation portion 16c is formed in a plate shape integral with the pair of fixed base portions 16a and 16b, it becomes possible to displace the upper base member 11 more stably downward. The load in the vertical direction can be measured with higher accuracy.

  In addition, a pair of connecting members 16 are provided so as to sandwich the reference axis O2 in the left-right direction B, and a pair of front and rear are provided so as to sandwich the reference axis O2 in the front-rear direction A. The reference axis O2 can be supported separately from both sides in the left-right direction B and both sides in the front-rear direction A. As a result, it is possible to suppress the upper base member 11 from swinging around the front and rear roll shafts extending in the front-rear direction A and the left and right roll shafts extending in the left-right direction B, and a more accurate test can be performed. .

When the elastically deforming portion 16c is formed in a plate shape integral with the pair of fixed base portions 16a and 16b as in this embodiment, the connecting member 16 sandwiches the reference axis O2 in the front-rear direction A. Thus, when the base members 11 and 12 are about to be displaced in the front-rear direction A, the front-rear force acting on the pair of front-rear connecting members 16 is applied to each of the connecting members 16. The elastic deformation portion 16c can be easily received. Further, in this case, the connecting member 16 is provided in a pair of left and right so as to sandwich the reference axis O2 in the left and right direction B, so that when the base members 11 and 12 are about to be displaced relatively in the left and right direction B, The lateral force acting on the pair of connecting members 16 can be easily received by the elastically deforming portions 16c of these connecting members 16.
As described above, the longitudinal force acting on the pair of front and rear connecting members 16 and the lateral force acting on the pair of left and right connecting members 16 can be easily received by the elastically deforming portions 16c of these connecting members 16. Therefore, it can suppress reliably that both the base members 11 and 12 are displaced relatively to the front-back direction A or the left-right direction B.

Further, the first restricting member 17A is engaged with both bases by engaging the first engaging member 18A and the lower fixed base portion 16a of the connecting member 16 facing the first engaging member 18A in the left-right direction B. Since the relative displacement of the members 11 and 12 in the left-right direction B is restricted, for example, the structure of the tire testing apparatus 10 can be simplified as compared with a case where a member that engages with the first engagement member 18A is separately provided. Can be planned.
Further, the first restricting member 17A is engaged with both bases by engaging the first engaging member 18A and the lower fixed base portion 16a of the connecting member 16 facing the first engaging member 18A in the left-right direction B. Since the relative displacement in the left-right direction B of the members 11 and 12 is restricted, for example, the first engaging member is compared to the case where the first engaging member is engaged with the elastically deforming portion 16c of the connecting member 16, Thus, the upper base member 11 can be reliably and reliably displaced downward while reliably restricting the relative displacement in the left-right direction B of 12, and the load measuring means 13 can reliably further increase the load in the vertical direction. It can measure with high accuracy.
Further, since the first claw portion 20A enters the first concave groove portion 19A, the swinging of the upper base member 11 around the front and rear roll shafts causes the first claw portion 20A to move to the inner wall surface of the first concave groove portion 19A. It becomes possible to control by making it contact | abut, and a still more highly accurate test can be performed.

In addition, the second engaging member 18B and the lower fixed base portion 16a of the connecting member 16 that opposes the second engaging member 18B in the front-rear direction A are engaged with each other, so that the second restricting means 17B is connected to both bases. Since the relative displacement of the members 11 and 12 in the front-rear direction A is restricted, for example, the structure of the tire testing apparatus 10 can be simplified as compared with a case where a member that engages with the second engagement member 18B is separately provided. Can be planned.
In addition, the second engaging member 18B and the lower fixed base portion 16a of the connecting member 16 that opposes the second engaging member 18B in the front-rear direction A are engaged with each other, so that the second restricting means 17B is connected to both bases. Since the relative displacement of the members 11 and 12 in the front-rear direction A is restricted, for example, the second engaging member is compared with the case where the second engaging member is engaged with the elastically deforming portion 16c of the connecting member 16. Thus, the upper base member 11 can be reliably and reliably displaced downward while reliably restricting the relative displacement of the front and rear direction 12 of the front and rear direction A, and the load measuring means 13 can surely further increase the vertical load. It can measure with high accuracy.
Further, since the second claw portion 20B enters the second concave groove portion 19B, the upper base member 11 swings around the left and right roll axis, and the second claw portion 20B becomes the inner wall surface of the second concave groove portion 19B. It becomes possible to control by making it contact | abut, and a still more highly accurate test can be performed.

The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, the first claw portion 20A and the second claw portion 20B may not be provided.

  Further, the restricting means 15 is not limited to that shown in the embodiment. For example, both base members are provided with engaging members that engage with each other in the front-rear direction or the left-right direction separately from the connecting member. You may regulate the relative displacement of the base member in the front-rear direction or the left-right direction.

  In the embodiment, a pair of connecting members 16 are provided so as to sandwich the reference axis O2 in the left-right direction B, and a pair of front and rear are provided so as to sandwich the reference axis O2 in the front-rear direction A. However, it is not limited to this. For example, a pair of the reference axes may be provided so as to be sandwiched between directions that are inclined in both the front-rear direction and the left-right direction.

Moreover, in the said embodiment, although the elastic deformation part 16c shall be formed in plate shape integral with a pair of fixed base parts 16a and 16b, it is not restricted to this. For example, the elastically deformable portion may be separately fixed by a pair of fixed base portions and bolts.
Furthermore, in the said embodiment, although the connection member 16 shall be arranged in multiple numbers in the said circumferential direction, it is not restricted to this.

In the above embodiment, the number of load measuring means 13 is four, but may be one, two, three, or five or more.
Furthermore, in the said embodiment, although the lower base member 12 was moved to the left-right direction B in the measurement process, it is also possible to move to the front-back direction according to the desired test result.

  In addition, it is possible to appropriately replace the constituent elements in the embodiment with known constituent elements without departing from the spirit of the present invention, and the above-described modified examples may be appropriately combined.

A Front-rear direction B Left-right direction O2 Reference axis T Tire 10 Tire testing device 11 Upper base member 12 Lower base member 13 Load measuring means 14 Support means 15 Restricting means 16 Connecting members 16a, 16b Fixed base 16c Elastic deformation part 17A First deforming means 17B 2nd control means 18A 1st engagement member 18B 2nd engagement member 19A 1st groove part 19B 2nd groove part 20A 1st claw part 20B 2nd claw part

Claims (9)

An upper base member and a lower base member arranged at intervals in the vertical direction;
A load measuring means arranged between these two base members and measuring a load acting from above, and a tire testing device in which a tire is pressed onto the upper base member,
Support means for supporting the upper base member so as to be displaceable downward;
Restriction means for restricting relative displacement in the front-rear direction and the left-right direction of the tire of the base members,
The tire testing apparatus according to claim 1, wherein the supporting means includes a connecting member that connects the base members and is elastically deformable in the vertical direction. The tire testing device according to claim 1,
A plurality of the connecting members are arranged in a circumferential direction along a reference axis extending in the up-down direction through a portion to which the tire is pressed in the upper base member,
The connecting member includes a pair of fixed bases separately fixed to the base members, and an elastic deformation part extending in a radial direction perpendicular to the reference axis and connecting the pair of fixed bases,
The tire test apparatus according to claim 1, wherein the bending rigidity in the circumferential direction of the elastic deformation portion is larger than the bending rigidity in the vertical direction of the elastic deformation portion. The tire testing device according to claim 2,
The tire testing device, wherein the elastic deformation portion is formed in a plate shape integral with the pair of fixed base portions. The tire testing device according to claim 2 or 3,
A pair of front and rear connecting members are provided so as to sandwich the reference axis in the left-right direction, and a pair of front and rear are provided so as to sandwich the reference axis in the front-rear direction. The tire testing device according to claim 4,
The restricting means includes first restricting means for restricting relative displacement in the left-right direction of the base members,
The first restricting means includes a pair of left and right first engaging members that sandwich the pair of left and right connecting members from the outside in the left and right direction and face the fixed base from the outside in the left and right direction,
The first restricting means is configured such that the first engaging member and the fixed base portion that opposes the first engaging member in the left-right direction are engaged with each other, whereby the both base members are relatively relative to each other in the left-right direction. Tire testing device characterized by restricting the displacement. The tire testing device according to claim 5,
The first engagement member enters the first concave groove formed so as to open toward the outer side in the left-right direction at the fixed base facing the first engagement member in the left-right direction. A tire testing device, wherein the claw portion is provided so as to project inward in the left-right direction. The tire testing device according to any one of claims 4 to 6,
The restricting means includes second restricting means for restricting relative displacement in the front-rear direction of the base members,
The second restricting means includes a pair of front and rear second engaging members that sandwich the pair of front and rear connecting members from the outside in the front-rear direction and face the fixed base from the outside in the front-rear direction,
The second restricting means is configured such that the second engaging member and the fixed base portion facing the second engaging member in the front-rear direction are engaged with each other, so that the base members in the front-rear direction are relative to each other. Tire testing device characterized by restricting the displacement. The tire testing device according to claim 7,
The second engagement member enters the second concave groove portion formed to open toward the outer side in the front-rear direction on the fixed base portion facing the second engagement member in the front-rear direction. A tire testing apparatus, wherein the claw portion is provided so as to project inward in the front-rear direction. A tire test method using the tire test apparatus according to claim 1,
It has a measuring step of measuring a load acting on the load measuring means after moving the lower base member in the left-right direction or the front-rear direction with the tire pressed against the upper base member. Tire test method.

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