JP4703269B2 - Test roller for vehicle inspection equipment - Google Patents

Description

  The present invention relates to a test roller of a vehicle inspection device used for vehicle tests such as braking force (brake), speed (speed), side slip (slip) of an automobile, for example.

  2. Description of the Related Art Conventionally, a test roller used in a vehicle inspection apparatus as described above transmits, for example, torsion or distortion generated during a braking test to a shaft body welded to an end of a roller body constituting the test roller, and the shaft body. Measured by a braking force detector connected to the roller, but only by welding the end of the roller body and the outer periphery of the end of the shaft body. Because the welded area is small and the mechanical strength is weak, it is applied during the braking test. If the stress such as torsion and distortion is large, cracks and tears may occur at the welded portion between the roller body and the shaft body, and the strength required to measure the braking force and speed cannot be obtained.

  In addition, torsion, distortion, etc. that occur during a braking test are transmitted through the welded part between the roller body and the shaft body, but are transmitted to the entire roller rather than being transmitted at each end of the roller body and shaft body. As a result, it is difficult to transmit torsion or distortion, and the transmission loss is large, so that the braking force cannot be measured accurately.

Further, a flange base member that supports an end portion of the cylindrical sleeve and an end portion of the columnar magnet provided in the cylindrical sleeve, and a support base that fits or abuts the end portion of the cylindrical sleeve and the columnar magnet; Although there is a flange for supporting an end portion of Patent Document 1 formed by press-joining a shaft body to a support base and a magnet roller using the flange, since only the sleeve and the support base are fitted or in contact with each other, When used in a braking test, slip is likely to occur between the sleeve and the support base, and it is difficult to transmit torsion or distortion generated during braking, so that an accurate measurement result cannot be obtained.
Japanese Patent Laid-Open No. 10-2323

  SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a test roller for a vehicle inspection apparatus that can accurately and reliably perform a work of measuring a braking force, a speed, and the like of a vehicle and obtain a highly accurate measurement result.

According to a first aspect of the present invention, the test roller of the vehicle inspection apparatus includes the left and right wheels of the vehicle placed between a pair of front and rear test rollers arranged on the left and right upper surfaces of the apparatus main body, and then the test rollers are built into the apparatus main body. A test roller of a vehicle inspection apparatus that detects a braking force by a braking force detection means provided on an intermediate shaft that connects the left and right test rollers, and is rotated from one end to the other. A roller main body in which a pair of closing bodies for closing both end openings of the cylindrical body are integrally assembled to both end openings of the cylindrical body formed to have substantially the same diameter toward the end, and an axis of the roller main body And a pair of shafts that are integrally joined to the outer surface side central portion of each closing body so as to be concentric with each other, and each closing body matches the opening portions at both ends of the roller body. Press-fitted into each state, the roller body and By the relative rotation around the mutual axis of the closing body, the inner peripheral surface of the opening and the outer peripheral surface of the peripheral edge of the closing body are integrally joined by friction welding, and the outer surface side central portion of the closing body The concave portion and the convex portion formed on the abutting surface with the end portion of the shaft body are aligned with each other, and the concave portion and the convex portion are brought into contact with each other by relative rotation around the axis of the closing body and the shaft body. The parts are integrally joined by friction welding.

According to this invention, after press-fitting each closed body into a state of matching each closed body in the opening portions of the roller main body constituting the test roller, the roller main body and each closed body are rotated relative to each other about the axis of each other. The inner peripheral surface of the opening at both ends of the roller body and the outer peripheral surface of the peripheral edge of each closing body are integrally joined by friction welding.

Next, after the concave and convex portions formed on the abutting surface between the outer surface side center portion of the closing body and the end portion of the shaft body are matched with each other, the closing body and the shaft body are rotated relative to each other about the axis of each other. The portion where the concave portion and the convex portion are in contact with each other is integrally joined by friction welding.

As described above, the inner peripheral surface of the opening at both ends of the roller body and the outer peripheral surface of the peripheral edge of each closing body are integrally joined by friction welding, and each closing body is fixed to the opening at both ends of the roller body. Therefore, each closing body can be fixed more firmly than press-fitting or welding to each opening of the roller body.

Further, the concave and convex portions formed on the abutting surfaces of the respective closing bodies and the respective shaft bodies are matched with each other, the portions where the concave and convex portions are in contact with each other are integrally joined by friction welding, and the respective shaft bodies are connected to each other. Since it is fixed to the central part of the closing body, the joining area is larger than the frictional pressure welding of the butted surfaces of the roller body and the shaft body by surface treatment, and the roller body and the shaft body can be firmly joined and fixed.

That is, the roller body made of the same material or a different material and the abutting surface of the closing body and the abutting surface of the closing body and the shaft body are rubbed against each other, and the roller body, the closing body, and the closing body are generated by frictional heat generated on the abutting surface. And the butted surface of the shaft body and its vicinity are melted and softened. At the same time, pressure is applied to the butted portions of the roller main body and the closing body and between the closing body and the shaft body, and the respective butted surfaces are integrally joined by friction welding.

That is, the joint area is larger than the welding of the roller main body and the closing body, and the closing body and the shaft body, and they are firmly joined and fixed, so that the strength necessary for measuring the braking force and speed can be obtained.

In addition, since the entire abutment surface of the roller body and the closing body, and the closing body and the shaft body are integrally joined, twisting and distortion generated in the entire roller are easily transmitted and there is no transmission loss, so braking force and speed Etc. can be measured accurately, and a highly accurate test result can be obtained.

  The above-described vehicle can be constituted by, for example, an automobile, a motorcycle, a truck, a bus, or the like. Further, the vehicle wheel can be constituted by, for example, a rubber tire, a metal, a single piece of wood, a composite wheel, or the like. Further, the driving means can be constituted by, for example, a driving device and a motor, a speed reducer, a sprocket, a chain, and the like.

The braking force detection means includes, for example, a torsion torque detection device that detects torsion that occurs in the test roller when braking force from the vehicle side acts on the test roller, a strain detection device that detects distortion that occurs in the test roller, An optical detection device, an overcurrent detection device, a contact detection device, or the like can be used.

A test roller for a vehicle inspection apparatus according to a second aspect of the invention is combined with the configuration according to the first aspect, wherein an outer peripheral portion of the shaft body joined to the closing body is cut and processed. It is characterized in that the shaft center with the shaft body is formed to be concentric .

  According to the present invention, the outer peripheral portion of the shaft body joined to the end of the roller body is cut so that the axis of the roller body and the shaft body is concentric. Even if the axial center of the main body and the shaft body is misaligned, there is no need to correct it, and it is possible to easily manufacture a highly accurate test roller in which the axial center of the roller main body and the shaft body is concentric. Further, for example, a stepped portion, a key groove, or the like can be cut on the outer peripheral surface of a shaft body to which parts such as sprockets and gears are fixed.

  According to the present invention, since the abutting surfaces of the roller body and the shaft body constituting the test roller are integrally joined by friction welding, the joining area is larger than that of welding the roller body and the shaft body, and the joint is firmly joined. Since it is fixed, the mechanical strength required to measure braking force, speed, etc. is obtained. In addition, since the entire abutment surface of the roller body and the shaft body are integrally joined, twisting and distortion generated in the entire roller are easily transmitted to the shaft body, and there is no transmission loss. It is possible to measure accurately and obtain a highly accurate test result.

  The purpose of the present invention is to connect the end of the roller body constituting the test roller and the intermediate shaft for the purpose of accurately and reliably performing the work of measuring the braking force, speed, etc. of the vehicle and obtaining a highly accurate measurement result. This is achieved by integrally joining the end of the shaft body to be joined by friction welding.

An embodiment of the present invention will be described in detail with reference to the drawings.
The drawing shows a test roller of a vehicle inspection device used for a braking test and a speed test of an automobile which is an example of a vehicle. In FIG. 1, the vehicle inspection device 1 includes left and right tires A, A pair of front and rear test rollers 3 on which A is supported are arranged on the left and right upper surfaces of the apparatus main body 2, and a driving device 4 that rotates the pair of front and rear test rollers 3 arranged left and right; A lifting device 5 that facilitates escape, a braking force detection device 6 that detects the braking force of an automobile, and a speed detection device 7 that detects the rotation speed of each test roller 3 corresponding to the speed of a speedometer, It is built in a substantially central part of the main body 2.

  As shown in FIGS. 2 and 3, the test roller 3 includes a cylindrical body 3b having a substantially hollow cross-section formed from one end side to the other end side and having substantially the same diameter, and both ends of the cylindrical body 3b. The roller body 3a is formed by integrally assembling a pair of closing bodies 3c and 3c that close the formed openings 3bA and 3bA, and the roller body 3a is concentric with the axis of the roller body 3a. It is comprised with a pair of each shaft body 3d and 3d integrally joined with respect to the outer surface side center part of each obstruction | occlusion body 3c and 3c fixed to the both ends. The closing body 3c constitutes the end of the roller body 3a.

  The roller body 3a matches the respective closed bodies 3c, 3c formed in a size and shape so that the openings 3bA, 3bA of the cylindrical body 3b are closed to the inner peripheral surfaces of the openings 3bA, 3bA. Each state is press-fitted, and the inner peripheral surface of each opening 3bA, 3bA of the cylindrical body 3b and the outer peripheral surface of the peripheral portion of each closing body 3c, 3c are integrally joined and fixed by friction welding described later. Alternatively, the closing body 3c constituting the end of the roller body 3a is integrally press-fitted into the opening 3bA of the cylindrical body 3b, or the inner peripheral surface of the opening 3bA of the cylindrical body 3b and the peripheral edge of the closing body 3c. The outer peripheral surface of the part may be integrally welded. Moreover, you may use together the said press injection and welding.

  Further, each closing body 3c fixed to both end portions of the roller body 3a by aligning shaft bodies 3d, 3d connected to an intermediate shaft 8 described later so as to be concentric with the axis of the roller body 3a. , 3c are integrally joined and fixed to the central portion on the outer surface side by friction welding.

  Further, a satin pattern that is substantially the same as or substantially similar to the paved road surface on which the automobile actually travels is provided substantially uniformly on the outer peripheral surface of the cylindrical body 3b with which the tire A of the automobile contacts.

  The satin pattern is attached when a steel sheet is rolled by a hot rolling mill, and is formed in a convex shape having such a height and shape that air resistance imparted during rotation is small and noise is reduced. .

  In addition, as a pattern other than the satin pattern, if the air resistance applied at the time of rotation is small and the noise is reduced as described above, for example, a desired pattern such as a sand pattern, a rock pattern, a geometric pattern, etc. It may be changed. One pattern shape may be formed into a desired shape such as a substantially round shape, a substantially rhombus shape, a substantially triangular shape, a substantially quadrangular shape, a substantially elliptical shape, or a substantially polygonal shape. Moreover, the test roller 3 can also be comprised by the roller formed in the substantially solid cross-sectional shape, the substantially cylindrical shape, etc., for example.

  The driving device 4 integrally connects the inner shaft portions 3d and 3d of the rear test rollers 3 and 3 arranged on the left and right by a single intermediate shaft 8, and drives a motor 9 built in the lower center of the device body 2. Due to the force, a small speed reducer 10 disposed near the motor 9, a sprocket 11 of the speed reducer 10, a sprocket 12 attached to a substantially central portion of the intermediate shaft 8, and a chain 13 stretched between the sprockets 11, 12. And a clutch device 14 attached in the vicinity of the sprocket 12, sprockets 15 and 15 attached to the outer shaft ends 3 d and 3 d of the front and rear test rollers 3 and 3, and a chain 16 stretched between the sprockets 15 and 15. The pair of front and rear test rollers 3 arranged on the left and right are rotated.

  The lifting device 5 is provided with a lifting platform 17 formed in a length and a width so that the left and right tires A, A of an automobile are supported substantially horizontally, between front and rear test rollers 3, 3. Ascending / descending to a lowered position (lift-down) where the tire A is placed between the test rollers 3 and 3 and an elevated position (lift-up) where the tire A is allowed to escape and pass between the pair of front and rear test rollers 3 and 3 Operate.

  The braking force detection device 6 is attached to small diameter portions formed at both ends of the intermediate shaft 8 substantially corresponding to the left and right test rollers 3, 3, respectively, and the braking force of the automobile is applied to the test roller 3 during a braking test. A device that detects a braking force (for example, twist or distortion) generated in each small-diameter portion of the intermediate shaft 8 when it works, and calculates and displays the braking force based on a detection signal (frequency) corresponding to the braking force. Output.

  The speed detection device 7 is attached to the inner shaft portion of one front test roller 3 arranged on the left and right, and detects the number of rotations of the test roller 3 rotated by the tire A of the automobile during the speed test. Based on a detection signal (pulse signal) corresponding to the number of rotations, the speed is output to a device that calculates and displays it.

  The illustrated embodiment is constructed as described above, and hereinafter, a method of integrally joining the two shaft bodies 3d and 3d to both ends of the roller body 3a constituting the test roller 3 by friction welding. Will be explained.

  First, after setting the roller main body 3a constituting the test roller 3 and the shaft body 3d so that the shaft centers thereof are substantially coincident with each other and setting the friction welding machine, as shown in FIGS. 4 and 5, the cylinder constituting the roller main body 3a is formed. The abutting surfaces of the closing body 3c fixed to one end of the body 3b and one shaft body 3d joined to the central portion on the outer surface side of the closing body 3c are pressed against each other in the axial direction.

  Next, as shown in FIG. 6, at least one or both of the roller body 3 a and the shaft body 3 d are rotated relative to the direction of the arrow (forward direction or reverse direction) around the axis of each other and closed. The butted surfaces of the body 3c and the shaft body 3d are rubbed together at high speed, and the butted surfaces of the closing body 3c and the shaft body 3d and the vicinity thereof are melted and softened by frictional heat generated on the butted surfaces.

  At the same time that the pressure contact temperature is reached, the relative rotation is stopped (or the relative rotation is continued), and the closing body 3c and the shaft body 3d are pressurized in the axial direction by pressurizing means such as a hydraulic device, so that the closing body 3c and the shaft body As shown in FIG. 7, the pressure thrust applied to the abutting surface with 3d is increased, and as shown in FIG. 7, one axis with respect to the outer surface side central portion of the closing body 3c fixed to one end of the cylindrical body 3b constituting the roller body 3a. The body 3d is integrally joined by friction welding.

  In the same manner as described above, the other shaft body 3d is also integrally joined to the outer surface side center portion of the closing body 3c fixed to the other end of the cylindrical body 3b constituting the roller body 3a by friction welding.

  Next, after the friction welding, the outer peripheral portions of the shaft bodies 3d and 3d joined to both ends of the roller body 3a are subjected to a predetermined shaft diameter and shape by a cutting means such as a lathe around the axis of the roller body 3a. As shown in FIG. 8, the roller body 3a and the shaft body 3d are cut so as to be concentric. Further, a stepped portion, a key groove, or the like is cut on the outer peripheral surface of the shaft body 3d to which parts such as sprockets and gears are fixed.

  Further, the shaft body 3d cut into an external shape as shown in FIG. 8 may be joined to the closing body 3c constituting the end of the roller body 3a by friction welding.

  In addition, each opening 3bA, 3bA formed at both ends of the roller body 3a constituting the test roller 3 is rubbed with each closing body 3c, 3c formed in a size and shape that closes each opening 3bA, 3bA. When integrally joining by pressure welding, each opening 3bA, 3bA formed in the opening 3bA, 3bA formed at both ends of the cylindrical body 3b constituting the roller body 3a is formed in such a size and shape that each opening 3bA, 3bA is closed. The occlusion bodies 3c and 3c are press-fitted into a matching state, and at least one or both of the cylindrical body 3b and the occlusion body 3c are relatively rotated about the mutual axis, and the inner peripheral surface of the opening 3bA The outer peripheral surface of the closing body 3c is rubbed against each other, and the contact peripheral surface of the opening 3bA and the closing body 3c is integrally joined by friction welding, so that the closing body 3c is joined to the opening 3bA of the cylindrical body 3b. Press fit Rather than welded, opening 3bA inner circumferential surface of the cylinder 3b and the peripheral portion outer peripheral surface of the closure member 3c is firmly fixed. Further, the inner peripheral surface of the opening 3bA of the cylindrical body 3b and the outer peripheral surface of the peripheral edge of the closing body 3c may be formed in a matching shape such as a stepped shape or a tapered shape.

  Further, as shown in FIG. 9, the closing body 3c, to which the shaft body 3d is previously joined, is integrally joined to the one end side opening 3bA of the cylindrical body 3b constituting the roller body 3a by friction welding. As shown in FIG. 10, the cylindrical body 3b constituting the roller body 3a, the closing body 3c, and the shaft body 3d may be joined in this order by friction welding.

  As described above, the closing surfaces of the respective closing bodies 3c, 3c fixed to both ends of the roller body 3a constituting the test roller 3 and the shaft bodies 3d, 3d are integrally joined by friction welding, so that Since the joining area is larger than that of welding the body 3c and the shaft body 3d and the body 3c and the shaft body 3d are firmly joined and fixed, the mechanical strength necessary for detecting braking force, speed, and the like is obtained. Further, since the entire butted surfaces of the respective closing bodies 3c, 3c fixed to both end portions of the roller body 3a and the shaft bodies 3d, 3d are integrally joined, twisting, distortion, etc. occurring in the entire roller are caused. Since it is easily transmitted to the shaft body 3d and there is no transmission loss, the braking force, speed, etc. can be measured accurately, and a highly accurate test result can be obtained. Further, since the shaft body 3d having a small diameter can be connected to the roller body 3a, the entire apparatus can be reduced in weight and size.

  Further, since the butted surface of the closing body 3c fixed to the end of the roller body 3a and the shaft body 3d are joined by frictional welding by surface treatment, the butting surface of the closing body 3c and the shaft body 3d is, for example, an uneven shape. Even if it is not processed into a cross-sectional shape such as a stepped shape that matches or fits with each other, it can be fixed to strength.

  Further, the outer peripheral portion of the shaft body 3d joined to the closing body 3c constituting the end portion of the roller body 3a is cut so that the shaft centers of the roller body 3a and the shaft body 3d are concentric. At the time of friction welding, there is no need to correct even if the axial center of the roller main body 3a and the shaft body 3d is displaced, and the test roller 3 having high accuracy in which the axis of the roller main body 3a and the shaft body 3d is concentric is provided. Easy to manufacture. During rotation, the shaft center between the roller body 3a and the shaft body 3d is not shaken, and the braking force, speed, and the like can be accurately measured.

  11 and 12 show another joining of the test roller 3 in which the end portion 3dA of the shaft body 3d is press-fitted into the concave portion 3cA formed on the abutting surface of the closing body 3c constituting the end portion of the roller body 3a and is friction-welded. A method is shown in which the end 3dA of the shaft body 3d is press-fitted into the recess 3cA formed in the central portion on the outer surface side of the closing body 3c so as to match each other, and the inner peripheral surface of the recess 3cA of the closing body 3c and the end of the shaft 3d The contact peripheral surface with the outer peripheral surface of the part 3dA is integrally joined by friction welding. That is, as the first embodiment, the joining area is larger than when the contact surface of the closing body 3c and the shaft body 3d is friction-welded by surface treatment, so that the roller body 3a and the shaft body 3d are firmly joined and fixed. The operations and effects substantially equivalent to those of the above embodiment can be achieved.

  Further, as shown in FIGS. 13 and 14, a convex portion 3cB formed on the abutting surface of the closing body 3c constituting the roller body 3a is press-fitted into a concave portion 3dB formed on the abutting surface of the shaft body 3d, and friction welding is performed. You may join integrally.

  In addition, as long as it is a shape which mutually matches as mentioned above, you may form any one of a recessed part and a convex part in the contact surface of the obstruction body 3c and the shaft 3d. Moreover, you may change a recessed part and a convex part into desired cross-sectional shapes, such as hemispherical shape, cone shape, trapezoid shape, stepped shape, for example.

In the correspondence between the configuration of the present invention and the above-described embodiment,
The vehicle of this invention corresponds to the automobile of the embodiment,
Similarly,
The wheel corresponds to tire A,
The driving means corresponds to the driving device 4,
The braking force detection means corresponds to the braking force detection device 6,
The present invention is not limited to the configuration of the above-described embodiment, but can be applied based on the technical idea shown in the claims, and many embodiments can be obtained.

  The test roller of the present invention can also be used for a composite (triple type) vehicle inspection apparatus that inspects a plurality of items such as braking force (brake), speed (speed), and side slip (slip) of an automobile.

The top view which shows the arrangement | sequence state of the test roller which comprises a vehicle inspection apparatus. The perspective view which shows the test roller which contacted the shaft body to the both ends of the roller main body by friction pressure. The expanded sectional view which shows the joining state of a shaft body. The perspective view which shows how to match | combine the shaft body with respect to the edge part of a roller main body. The expanded sectional view which shows the press-contact state of the shaft body with respect to the edge part of a roller main body. The perspective view which shows the rubbing state of the shaft body with respect to the edge part of a roller main body. The expanded sectional view which shows the joining state of the shaft body with respect to the edge part of a roller main body. The perspective view which shows the cutting state of the shaft body joined to the edge part of a roller main body. The perspective view which shows the other method of joining the obstruction body with a shaft body to a cylinder. The perspective view which shows the other method of joining in order of a cylinder, a closure, and a shaft. The expanded sectional view which shows the other joining method of a roller main body and a shaft body. The expanded sectional view which shows the joining state of the roller main body and shaft body of FIG. The expanded sectional view which shows the other joining method of a roller main body and a shaft body. FIG. 14 is an enlarged cross-sectional view showing a joined state of the roller body and the shaft body of FIG. 13.

DESCRIPTION OF SYMBOLS A ... Tire 1 ... Vehicle inspection apparatus 2 ... Apparatus main body 3 ... Test roller 3a ... Roller main body 3b ... Cylindrical body 3bA ... Opening part 3c ... Occlusion body 3cA ... Concave part 3cB ... Convex part 3d ... Shaft body 3dA ... End part 3dB ... Concave part DESCRIPTION OF SYMBOLS 4 ... Drive device 5 ... Elevating device 6 ... Braking force detection device 7 ... Speed detection device 8 ... Intermediate shaft

Claims (2)

After the left and right wheels of the vehicle are placed between a pair of front and rear test rollers arranged on the left and right upper surfaces of the apparatus main body, the test rollers on the left and right are rotated by driving means built in the apparatus main body to connect the left and right test rollers. A test roller for a vehicle inspection device that detects a braking force by a braking force detector provided on an intermediate shaft,
The test roller
A roller main body formed by integrally assembling a pair of closing bodies for closing both end openings of the cylindrical body at both end openings of the cylindrical body formed to have substantially the same diameter from one end side toward the other end side; It is composed of a pair of shaft bodies that are integrally joined to the outer surface side center portion of each closing body so as to be concentric with the axis of the main body,
The closure body is press-fitted into the both ends of the roller body so as to match each other, and the inner periphery of the opening is closed by relative rotation about the mutual axis of the roller body and the closure body. The body outer peripheral surface is joined integrally by friction welding,
The concave portion and the convex portion formed on the abutting surface between the outer surface side center portion of the closing body and the end portion of the shaft body are matched with each other, and by relative rotation about the mutual axis of the closing body and the shaft body, A test roller for a vehicle inspection apparatus, in which a portion where the concave portion and the convex portion are in contact is integrally joined by friction welding . The vehicle inspection apparatus according to claim 1 , wherein an outer peripheral portion of the shaft body joined to the closing body is cut so that an axial center of the roller body and the shaft body is concentric . Test roller.

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