JP2010500215A - Device for repairing centering in a tire rim - Google Patents

Abstract

A device for repairing the centering of a tire rim, comprising a rod (2) and thruster means (4, 4 '). The rod (2) is inserted into a centering hole (11) for engaging the rim (10) with the hub of the automobile and is concentric with the rod to position the rod along the axial direction of the rim. Means (202, 212, 102, 112) for locking the fixing plate of the rim are provided. The thruster means (4, 4 ') can act in any direction perpendicular to the rod (2), is displaceable in a direction parallel to the rod (2), and is provided with adjusting and supporting means ( 3, 104) and means (164, 174) for fixing the position along the rod. The rod (2) is mounted rotatably with respect to its axis, is provided with actuating means (101), and means (201, 301, 401) for detecting balance and geometric deformation It is connected to the.

Description

Detailed Description of the Invention

  The present invention relates to an apparatus for readjusting or repairing centering in a tire rim.

  The use of alloy rims as standard equipment in automobiles and the use of parts designed for special optional equipment is becoming increasingly widespread and can be combined with tires commonly known as flat tires. Is a general trend. If the elasticity of the tire is not sufficient to absorb all of the impact force due to the above use, the rim will deform due to frequent collisions with obstacles such as paved roads, stones, holes, etc. Becomes prominent. Until a while ago, the damage was repaired by manual intervention in which the damaged rim was struck with a hammer and thereby dented and approximately centered. Operators with a high degree of expertise in this area use lathes for this type of repair, but still have a centering point of view and structural damage to the rim, ensuring proper and safe operation. The method is clearly limited in that it can often be difficult. Some operators use a suitably equipped hydraulic press to reshape the rim circle in high heat conditions (deep drawing). As a result, the structure of the rim raw material can change and the original size of the rim can change due to the extensional stress relief caused by overheating and subsequent pressure. The superheat and pressure are generated from a device operated by a press.

  Document EP-A-14241145 describes a device for re-centering a tire rim, which device comprises a rod and a thruster means. The rod can be connected to a suitable support and can be inserted into a hole to engage the hub and rim in the wheel, and further locks the plate in the rim concentrically with the rod. Means. The means for locking is for placing the rod along the axial direction of the rim. The thruster means can act in any direction perpendicular to the rod, is displaceable along the latter, and comprises means for adjusting and fixing the position of the means along the rod.

  For the device described above, from its structural and geometrical properties with respect to the connection to the rim, the concentricity of the rim with respect to its axis could be fully verified and demonstrated using quantitative analysis. The quantitative analysis is performed by the user during the various stages of recentering. The verification was performed using a means of comparison, that is, a means of frictional contact between two bodies rotating concentrically with respect to each other. Therefore, the accuracy of the repair can be guaranteed 100%, but it still depends on the user.

  Furthermore, it has been time consuming to determine the appropriate extrusion force to be pressurized. In this regard, in order to verify the degree of deformation, it is believed that a known type and commercially available wheel balancer is used, so that the accuracy is determined quantitatively during the continuous process of repair. It was. However, in this case, if confirmation is performed every time a single pushing force is applied to the rim, it takes a very long time.

  Accordingly, an object of the present invention is an apparatus that makes it possible to perform a rim repair operation more accurately and easily, and the degree of damage during the entire process of re-centering and accuracy verification regarding the application of force. An object of the present invention is to provide an apparatus that enables analytical evaluation.

  The invention therefore relates to a device for repairing centering in a tire rim, comprising a rod and thruster means. The rod is inserted into a centering hole for engaging a hub and a rim in an automobile, and is arranged coaxially with the rod so that the rod is arranged along the direction of the axis of the rim. Means are provided for locking the fixation plate. The thruster means can act in any direction perpendicular to the rod itself, is displaceable in a parallel direction with respect to the rod, and is along the adjustment means, the support means, and the rod. And means for fixing the position of the thruster means. The rod is rotatably mounted with respect to its axis, is provided with actuating means and is connected to means for detecting balance and geometric deformation.

  In a preferred embodiment, the thruster means are arranged mechanically and statically on the support means, completely independent of the rod. The thruster means may comprise two hydraulic jacks. The hydraulic jacks are arranged on opposite sides with respect to the axis of the rod and are mounted on a common support portion. The common support portion can be displaced in a direction parallel to the rod, and can be fixed to an arbitrary position with respect to the rod by an appropriate means.

  The hydraulic jack is built in the hydraulic circuit. The hydraulic circuit applies a hydraulic jack so that the first jack bears the inner wall of the rim and the second rim applies a predetermined pushing force in the same direction, i.e. in the opposite direction to the first jack. Control and balance their effects.

The invention also relates to a method for repairing centering in a tire rim using the apparatus described above. The method is
Placing the rim on the rod and fastening the rim;
Detecting a degree of eccentricity relative to the axis using a device for detecting deformation of the rim and detecting / determining the degree of eccentricity;
Positioning and locking the thruster means;
Applying a specified pushing force to the rim using the thruster means;
Using a device for detecting / determining the eccentricity to verify the effect of the pushing force;
Continuously repeating steps d) and e) until the rim is readjusted.

  Further advantages of the device according to the invention and the method of use thereof will become apparent from the following detailed description of embodiments, provided through non-limiting examples, with reference to the accompanying drawings.

FIG. 1 is a side view showing an embodiment of an apparatus according to the present invention. FIG. 2 is a front view showing a detail of FIG. FIG. 3 is a plan view showing the details of the apparatus according to the present invention, showing a rim mounted for machining. FIG. 4 is a circuit diagram showing a hydraulic circuit of an embodiment of the apparatus according to the present invention.

  FIG. 1 shows an embodiment of an apparatus according to the present invention. Member number 1 indicates a support frame in the apparatus. Inside the support frame, the rod 2 is connected to the operating means 101, the operating means 101 is connected to the detecting means 201, the detecting means 201 is connected to the central processing unit 301, and the central processing unit 301 supplies the acquired data and processed data to the monitor 401. The rod 2 has a threaded portion 102 at the end opposite to the end connected to the actuating means 101. The screw portion 102 has a rim fixing bush 112 having a gripping means 122 connected to the screw portion 102. As can be seen more clearly from the drawings described below, the thread ends in a disk 202 connected to the rod 2. The thruster 4 and the means 3 for guiding the thruster 4 ′ are arranged to be concentric with the rod 2. The thruster 4 and the thruster 4 ′ are connected to each other by a stirrer 104. The guide means 3 is fixed to a bracket 5 protruding from the frame 1 by a method described in detail below.

  FIG. 2 is a front view showing a detail of FIG. The same members are assigned the same member numbers. The rod 2 shown in cross section is surrounded by a support bearing 302. The support bearing 302 is disposed around the rod 2 and has two guides 3 connected by a bridge member 103. On the bottom surface, the two guides 3 are fixed to the right angle portion 205 by the fixing means 225, and the right angle portion 205 is connected to the U-shaped portion 105 by the fixing means 215. The U-shaped portion 105 is connected to the bracket 5 connected to the support frame in the apparatus. On the upper surface of each of the two guides 3, a groove 203 having a crosspiece 134 is installed therein, and in one of the two grooves 203, a sliding portion 124 is attached on the crosspiece 134. The sliding portion is connected to a washer 104 that connects two thruster means, and the thruster means is a hydraulic jack 4 and a hydraulic jack 4 'in the illustrated example. Inside the other groove 203, a sliding portion 144 is attached on the cross board 134, and a screw pin 164 having a handle 174 passes through the sliding portion 144. The other open end of the screw pin 164 can contact the crosspiece 134. The hydraulic jack 4 and the hydraulic jack 4 ′ are connected to the end 114 of the stirrer 104 at a position diametrically opposite to the rod 2, and include a movable piston 204 and a movable piston 204 ′. Each movement of the movable piston is radial with respect to the rod 2.

  FIG. 3 is a top view showing similar details, except that in this case the rim is arranged on the device. Again, the same members are represented by the same member numbers. As can be seen, the rim 10 re-centers with the wheel hub of an automobile wheel mounted on the threaded end 102 of the rod 2 and cooperates with a frustoconical end 212 protruding from the disc 202. Therefore, it is arranged with a hole 11. The rim plate 13 is set on a disk 202. The side wall 12 in the rim can come into contact with the thruster 4 and the thruster 4 '.

  Finally, FIG. 4 is a schematic diagram showing an embodiment of the hydraulic circuit of the apparatus according to the present invention. The member number 6 indicates a pump of the circuit. The pump pumps a working fluid, that is, oil from the tank 806 using the filter 706 and is operated by the motor 106. The pump has two circuit branches, both of which have a maximum pressure valve 206. One of the branches terminates in a hydraulic jack 4 'comprising a piston 204' and resilient recall means 214 'and has a fill / discharge valve 406 arranged along the hydraulic jack 4'. The valve 406 allows the positioning of the piston 204 ′ to withstand the side wall 12 of the rim 10 in operation. The other of the branches terminates in a jack 4 having a piston 204 and elastic recovery means 214, and is linked to a maximum pressure valve 306 and a charge / discharge valve 506 in the jack 4 and is connected to a jack. In point, it cooperates with regulating valve 606 and pressure gauge 616.

  The operating principle of the device according to the invention and the method for re-centering the rim using the device will become clear from the following description. The bush 112 may be removed from the threaded portion 102 of the rod 2 and the rim may be placed on the disk 202 using the rim plate 13. Subsequently, the centering of the hole 11 on the end 212 is performed by tightening the bush. At this point, a first check is made on the rim, the rod is rotated, and the detection device 201 and computing device 301 are used to detect deformation of the geometric feature, both in terms of size and position. . After the analysis is finished, the thruster means 4 and the thruster means 4 'are appropriately arranged for repair, the bracket 4 is slid along the guide 3, and the handle 174 for operating the screw pin 164 is used. The sliding part 144 is fixed at an appropriate position.

  In the next step, the operation of the thruster 4 'is assumed. The piston 204 ′ in the thruster 4 ′ contacts the rim side wall 12 at the exact opposite position where it faces the deformation. The valve 606 takes advantage of the control action that can be exerted on the liquid filled at the end of the branch in the circuit, and at the same time senses pressure using the pressure gauge 616 and pushes back applied using the piston 204 of the thruster 4 Measure the degree of force appropriately. Thereafter, piston 204 and piston 204 'are retracted and the rim is again checked for its concentricity. The push-back operation and check are repeated until the rim has concentricity within tolerance limits specified by the manufacturer.

  Another important aspect relating to the design of the device according to the invention relates to the positioning of the thruster means 4 and the thruster means 4 ′ with respect to the rod 2. The rod 2 can rotate without being affected by any kind, as shown in FIG. 3, since it can infer data about the position and the degree of damage to be repaired by rotating with the attached rim. There is a need. In this regard, reference should be made to the illustrated method of connection between the means for guiding the thruster means 4 and the thruster means 4 'in FIG. 2 and the frame in the apparatus. Basically, the guide 3 is fixed to the bracket 5 by using the members 105 and 205 without affecting the stationary state of the rod 2 in any case. In addition, this type of arrangement avoids any obstacles to the rotation of the rod and thus avoids damaging the data detected by the device 201 connected to the rod. The means for positioning the brace 104 along the guide 3 and the locking means are not designed as manual control means, as shown in the illustrated embodiment, but rather as servo control means. May be designed as

Claims (7)

An apparatus for repairing centering in a tire rim,
A rod and a thruster means;
The rod is inserted into a centering hole for engaging the rim with the hub of the automobile, and the rim is fixed so that the rod is arranged along the axis of the rim. Means for locking the plate coaxially with the rod;
The thruster means can act in any direction perpendicular to the rod, is displaceable in a direction parallel to the rod, and is adapted to adjust and support means, along the rod. Means for fixing the position of the thruster means,
The rod is mounted so as to be rotatable with respect to the axis of the rod, comprises actuating means and is connected to means for detecting balance and geometric deformation.   The thruster means (4, 4 ') are arranged mechanically and statically on the support means (104, 3) completely independently of the rod (2) and the support frame of the device The apparatus of claim 1 connected to (1).   The device according to claim 2, wherein the rod (2) is arranged along an axis substantially parallel to the ground plane on which the support frame (1) is installed. The thruster means comprises two hydraulic jacks (4, 4 ');
The hydraulic jacks are arranged on opposite sides of the rod (2) and are attached to a common support (104).
The common support is displaceable in parallel to the rod along the guide (3) and is fixed in position using means (164, 174) adapted to the guide (3). 4. The apparatus according to any one of claims 1 to 3. The guide comprises two members (3);
The two members are arranged on opposite sides of the rod (2) and project from the support frame (1) of the device in a direction parallel to the axis of the rod (2). The device according to any one of claims 2 to 4, wherein the device is connected to (5). The hydraulic jack (4, 4 ') is built in the hydraulic circuit,
In the hydraulic circuit, the first jack (4 ′) bears the inner wall (12) of the rim (10), and the second jack (4) can apply an extrusion force with a prescribed strength. 6. A device according to claim 4 or 5, which controls a hydraulic jack. A method for repairing centering in a rim of a tire using the apparatus according to any one of claims 1 to 6, comprising:
Placing the rim (10) on the rod (2) and fastening the rim (10) using suitable means (102, 112, 202, 212);
Detecting a centering / concentric defect of the rim using an apparatus for detecting eccentricity (201, 301);
Arranging and fixing the thruster means (4, 4 ') in an appropriate position;
Applying an extrusion force to the rim at a specified strength using the thruster means (4, 4 ');
Using a device for detecting the eccentricity (201, 301) and verifying the effect of the applied pushing force;
Repeating steps d) and e) until the rim (10) is readjusted.

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