Torque converter and adjustment member

Abstract

To provide a torque converter capable of facilitating adjustment of rotation balance at high speed.SOLUTION: In a torque converter 1 having a columnar rotating part 3 and a fixed part 2, and converting torque acting on the rotating part 3 into an electric quantity, a flat adjusting member w having a circular arc shape, and splittable at a predetermined angle in the circumferential direction, is coaxially fixed to the rotating part 3. In the adjusting member w, fixing holes and split parts are alternately arranged in the circumferential direction, and the adjusting member w is used by being split at the split parts.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a torque transducer that measures torque and converts it into an electrical signal, and an adjusting member used therein. [Background technology]

[0002] A conventional torque transducer, which has connecting flanges at both ends and a cylindrical strain-generating part connected between the flanges, is known as a measuring device for measuring torque generated on a wheel of an automobile rotating at high speed. This torque transducer includes a rotating part that connects the object to be measured and rotates together with the object, and a fixed part that receives a torque signal from the rotating part and outputs a measured value. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2020-020582 Summary of the Invention [Problem to be solved by the invention]

[0004] Because this rotating part rotates at high speed together with the object to be measured, it is necessary to adjust the rotational balance. Conventionally, balance adjustment has been performed by drilling multiple screw holes in the flange in the direction of rotation and inserting set screws or the like. However, adjustment using set screws alone is difficult, and drilling multiple screw holes leads to reduced rigidity and increased costs, leaving room for improvement.

[0005] In view of the above problems, an object of the present invention is to provide a torque converter that makes it easy to adjust the rotational balance. [Means for solving the problem]

[0006] The torque converter of the present invention comprises: A torque converter having a cylindrical rotating part and a fixed part, which converts torque acting on the rotating part into an electrical quantity, The adjustment member is an arc-shaped flat plate that can be split at a predetermined angle in the circumferential direction and is fixed to the rotating part coaxially with the rotating part.

[0007] Furthermore, the adjustment member has fixing holes and fractured portions arranged alternately in the circumferential direction.

[0008] The adjusting member of the present invention comprises: It is a flat, arc-shaped plate with fixing holes and cleaved portions arranged alternately in the circumferential direction, and is fixed coaxially with the rotating portion of a torque converter to adjust the rotational balance of the rotating portion. [Effects of the Invention]

[0009] According to the present invention, it is possible to provide a torque converter that can easily adjust the rotation balance at high speeds. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a perspective view showing an external appearance of a torque converter according to an embodiment of the present invention; [Figure 2] 1A is a rear view of a torque converter according to an embodiment of the present invention, and FIG. 1B is a rear view in which some components are omitted. [Figure 3] 1A and 1B are a rear perspective view of a torque converter according to an embodiment of the present invention, with some components omitted, and a plan view of an adjustment member. DETAILED DESCRIPTION OF THE INVENTION

[0011] A torque converter according to an embodiment of the present invention will be described in detail below with reference to the drawings. Fig. 1 is a perspective view showing the appearance of a torque converter 1 according to an embodiment of the present invention.

[0012] The torque transducer 1 comprises a rotating section 3 that receives torque from an object to be measured, and a fixed section 2. The rotating section 3 has a strain-generating section 3c, flange sections 3a-3b, and a strain-sensitive resistor G and a circuit board 20 inside these. The fixed section 2 has an electrical equipment box 9, and a power supply section 7, a rotational speed detection section 8, and a receiving section 10 are provided on the top surface of the electrical equipment box 9. The rotating section 3 and the fixed section 2 are configured as separate bodies, and the torque transducer 1 is used by installing both of them at a predetermined position and spaced apart, and converts the torque acting on the rotating section 3 into an electrical quantity.

[0013] The rotating part 3 has a hollow cylindrical shape and has a thin-walled portion in the axial direction. A strain-sensitive resistor G and a circuit board 20 are disposed in the hollow part of the rotating part 3. The flange part 3a is made of a highly rigid annular metal that does not easily deform. The flange part 3a has a plurality of screw holes arranged at equal angular intervals in the circumferential direction, and is connected to the driving member on the driving side by bolts. The flange part 3b is also made of a highly rigid annular metal that does not easily deform. The flange part 3b has a plurality of screw holes arranged at equal angular intervals in the circumferential direction, and is connected to the load member on the slave side by bolts.

[0014] Furthermore, there is a strain-flexing part (not shown in the figure) between flange parts 3a and 3b in the axial direction, and flange parts 3a and 3b are coaxial. The strain-flexing part is hollow cylindrical, and flange parts 3a and 3b at both ends of the strain-flexing part are formed as a single member. The diameter of the outer cylindrical surface of the strain-flexing part is smaller than the diameter of the outer periphery of flange parts 3a and 3b, and its thickness is also formed relatively thin. Furthermore, multiple strain-sensitive resistors are attached to the inner peripheral surface of the strain-flexing part.

[0015] Gear 4 is a spur gear provided on the flange portion 3a side. Gear 4 protrudes radially from the outer periphery of flange portion 3a and is located midway between flange portions 3a and 3b in the direction of the rotation axis.

[0016] Rotation speed detection unit 8 uses gear 4 to detect the rotation speed and direction of rotation of rotating unit 3. Rotation speed detection unit 8 has two magnetic resistance elements arranged at a predetermined distance from gear 4 on the circumference close to the tip circle of rotating gear 4, and detects the change in magnetic force caused by the tip of the gear 4 passing between these magnetic resistance elements to detect the rotation speed and direction.

[0017] The transmitting antenna board 11 is used to wirelessly transmit a signal representing the torque value detected by the rotating part 3. The transmitting antenna board 11 is, for example, a flat printed wiring board on which conductor lines are printed, and is attached to the entire cylindrical outer surface of the flange part 3a.

[0018] The power receiving unit 5 is a coil wound around the outer periphery of the flange portion 3b, and is used to receive power from the power supply unit 7. A wire drawn from the power receiving unit 5 is led into the interior of the rotating unit 3 through a hole provided in the cylindrical surface of the flange portion 3b, and is connected to a circuit board 20 fixed inside the rotating unit 3.

[0019] The power supply unit 7 accommodates a power transmission coil for connecting with the power receiving unit 5 at a predetermined distance to form a rotary transformer in order to transmit power to the rotating unit 3 in a contactless manner.

[0020] Lids 6 are provided on both sides of the flange portions 3a and 3b to protect the components arranged inside the rotating portion 3 from wind force and dust generated by high-speed rotation.

[0021] The electrical component box 9 houses a board including a circuit for contactlessly transmitting power to the rotating unit 3 via the power feeder 7. It also houses boards including a circuit that receives a digital torque signal from the transmitting antenna board 11 of the rotating unit 3, demodulates it, and outputs a torque value, a circuit that detects the rotation speed and rotation direction of the rotating unit 3 from the rotation speed detector 8 and outputs the detected signal, and a power supply circuit that converts externally supplied power and supplies power to each circuit. The electrical component box 9 is also provided with external terminals 21 for supplying power to the fixed unit 2 and outputting signals such as torque and rotation speed from the fixed unit 2.

[0022] Fig. 2(a) is a rear view of the torque converter 1 according to the embodiment of the present invention, and Fig. 2(b) is a view when the cover 6 fixed to cover the rotation center of the rotating part 3 is removed.

[0023] A circuit board 20 is disposed and fixed in the hollow portion of the strain-generating section. Wiring extending from the strain-sensitive resistor is connected to the circuit board 20. The circuit board 20 includes an amplifier circuit, an analog-to-digital conversion circuit, an arithmetic circuit, a modulation circuit, and a transmission circuit. The amplifier circuit amplifies the analog signal output from the Wheatstone bridge circuit including the strain-sensitive resistor. The analog-to-digital conversion circuit converts this analog signal into a digital signal. The arithmetic circuit processes this digital signal to generate a torque signal representing a torque value. The modulation circuit modulates the digital torque signal to generate a modulated signal. The transmission circuit transmits the modulated signal on a carrier wave from the transmitting antenna board 11 to the receiving circuit in the electrical equipment box 9 via the receiving unit 10 of the fixed unit 2. The circuit board 20 is also connected to wiring extending from the power receiving unit 5. It receives the transmitted power and supplies it to the amplifier circuit, analog-to-digital conversion circuit, arithmetic circuit, modulation circuit, transmission circuit, and Wheatstone bridge circuit via a rectifier circuit that rectifies the power.

[0024] The flange portion 3b has a hollow portion on its edge, and threaded holes 3d are provided in the circumferential direction. The adjustment member w can be fixed to the flange portion 3b by screws s.

[0025] FIG. 3(a) is a rear perspective view of the torque converter 1 according to the embodiment of the present invention, with a portion thereof omitted, and FIG. 3(b) is a plan view of the adjustment member.

[0026] In Figure 3(a), adjustment members w3, w2, and w1 are fixed to the flange portion 3b with screws s. The adjustment member w is, for example, an arc-shaped flat plate with screw holes h and a cleaving section sl, as shown in Figure 3(b). The cleaving section sl has a radial hole, allowing the adjustment member w to be separated by cleaving with scissors, a cutter, or bending. For example, Figure 3(b) shows adjustment member w3. By cutting this adjustment member w3 along line C-C, adjustment members w2 and w1 can be created one by one. The adjustment member w is preferably an arc-shaped member with multiple fixing holes and cleaving sections sl arranged alternately in the circumferential direction. Therefore, the adjustment worker can cut this adjustment member as needed and attach it to the flange portion 3b. Furthermore, preparing adjustment members with several thicknesses and different specific gravities facilitates even finer adjustments. Another advantage is that adjustment members w can be stacked and attached in the same position, making adjustments easier. Furthermore, by removing part or all of the protrusions of the cleaved portion sl that are generated by cleaving, the mass of the adjustment member w can be reduced, allowing for even finer adjustment.

[0027] The actual rotation balance adjustment is carried out by inputting data measured by a vibration meter and a tachometer on vibration and rotation speed, and identifying the direction and weight of the imbalance. Once the adjustment parts are determined, the screws s are fixed with adhesive and the adjustment is complete.

[0028] The present invention has been described above based on a preferred embodiment, but the present invention is not limited to the above-described embodiment and various modifications are possible without departing from the spirit of the present invention. [Industrial Applicability]

[0029] As an example of the use of the present invention, it can be applied to a device for measuring torque generated in the wheels of an automobile rotating at high speed. [Explanation of symbols]

[0030] 1: Torque transducer 2:Fixed part 3: Rotating part 3a, 3b: Flange section 3d: screw holes 4: Gears 5: Power receiving unit 6: Lid 7: Power supply unit 8: Rotation speed detection section 9: Electrical equipment box 10: Receiving unit 11: Transmitting antenna board 20: Circuit board 21: External terminal s: screw w, w1, w2, w3: Adjustment members h: hole sl: Cutting part

Claims

1. A torque converter having a cylindrical rotating part and a fixed part, which converts torque acting on the rotating part into an electrical quantity, A torque converter in which an adjustment member, which is an arc-shaped flat plate that can be split at a predetermined angle in the circumferential direction, is fixed to the rotating part coaxially with the rotating part.

2. 2. The torque converter according to claim 1, wherein the adjustment member has fixing holes and cleaved portions arranged alternately in the circumferential direction.

3. An adjustment member that is flat and arc-shaped, with fixing holes and cleaved portions arranged alternately in the circumferential direction, and is fixed coaxially with the rotating portion of a torque converter to adjust the rotational balance of the rotating portion.

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