WO2017033585A1

WO2017033585A1 - Mixer and method for supplying power to power receiving section attached to mixer

Info

Publication number: WO2017033585A1
Application number: PCT/JP2016/070021
Authority: WO
Inventors: 司瓶子; 大木　紀知; 岩本　貴宏
Original assignee: Ｋｙｂ株式会社
Priority date: 2015-08-25
Filing date: 2016-07-06
Publication date: 2017-03-02
Also published as: JP6067072B1; AU2016312442A1; NZ735881A; JP2017042960A

Abstract

Provided is a mixer capable of satisfactorily supplying power to an electrical instrument that rotates with a mixer drum. This mixer (10J) comprises a front support section (11F), a rear support section (11B), a mixer drum (10), a slump sensor (16), and a power transmission section (30). The mixer drum (10) includes a drive shaft (10B) that is rotatably supported by the front support section (11F), and rotates about the drive shaft (10B). The slump sensor (16) is attached to the mixer drum (10). The power transmission section (30) includes a power receiving section (30C) and a power supply section (30D). The power receiving section (30C) is attached to the mixer drum (10) and supplies power to the slump sensor (16). The power supply section (30D) is attached to the front support section (11F), is provided at a predetermined distance from the power receiving section (30C), and supplies power to the power receiving section (30C) by temporarily or constantly facing the power receiving section (30C).

Description

Mixer and method for supplying power to power receiving unit attached to mixer

The present invention relates to a mixer and a method for supplying power to a power receiving unit attached to the mixer.

Patent Document 1 discloses a conventional mixer. The mixer includes a mixer drum (drum), a support (vehicle body), a solar power generator, and a plurality of electric devices (residual water detection sensor (sensor)). The mixer drum is provided with an opening having one end opened. The support portion is rotatably mounted with a mixer drum. The solar power generator is provided on the outer peripheral surface of the mixer drum. The solar power generator generates power by receiving sunlight while rotating with the mixer drum. The plurality of electric devices are provided side by side in the circumferential direction on the inner peripheral surface of the mixer drum. The plurality of electrical devices rotate with the mixer drum. For this reason, this mixer can supply the electric power generated by receiving sunlight while a solar power generator provided on the outer peripheral surface of the mixer drum rotates together with the mixer drum to a plurality of electric devices. That is, this mixer does not need to feed power from the support side to the electrical equipment provided on the mixer drum side via the power line, and the power line for feeding power to the electrical equipment does not break.

Japanese Patent Laid-Open No. 2008-100407

However, the mixer of Patent Document 1 generates power with a solar power generator that is affected by the surrounding environment such as time zone and weather. For this reason, this mixer may not be able to stably supply power to the electrical equipment depending on the surrounding environment.

The present invention has been made in view of the above-described conventional situation, and it is an object to be solved to provide a mixer capable of satisfactorily supplying power to an electric device that rotates together with the mixer drum.

The mixer of the present invention includes a support part, a mixer drum, an electric device, and a power transmission part. The mixer drum has a drive shaft that is rotatably supported by the support portion, and rotates around the drive shaft. The electrical equipment is attached to the mixer drum. The power transmission unit has a power receiving unit and a power feeding unit. The power receiving unit is attached to the mixer drum and supplies electric power to the electric device. The power feeding unit is attached to the support unit, and supplies power to the power receiving unit with a predetermined space between the power receiving unit and the power receiving unit temporarily or constantly facing the power receiving unit.

In the mixer of the present invention, the support portion has a cylindrical concealing portion provided coaxially with the drive shaft so as to cover the periphery of the drive shaft of the mixer drum. In the power transmission unit, the power receiving unit is provided on the outer peripheral surface of the drive shaft of the mixer drum, and the power feeding unit is provided on the inner peripheral surface of the concealing unit.

In the mixer of the present invention, the power transmission unit has a power reception unit provided on the outer peripheral surface of the mixer drum. The power transmission unit includes a power supply support member that extends along the circumferential direction of the mixer drum and is disposed at a position where the power supply unit temporarily faces the power reception unit.

In the mixer of the present invention, the power transmission unit includes at least one of a power receiving unit and a power feeding unit.

The method for supplying power to the power receiving unit attached to the mixer of the present invention includes the first to third procedures. In the first procedure, an electrical characteristic value corresponding to the power supplied from the power supply unit to the power reception unit is obtained. In the second procedure, the position of the power receiving unit with respect to the power feeding unit is obtained from the electrical characteristic value obtained in the first procedure. In the third procedure, a current is supplied to the power feeding unit based on the position of the power receiving unit obtained in the second procedure. In addition, the method for supplying power to the power receiving unit returns to the first procedure when the electrical characteristic value becomes smaller than a predetermined value.

It is a side view which shows the mixer truck of Embodiment 1. (A) is a perspective view showing a main part, and (B) is a sectional view taken along line XX in (A), regarding the mixer of the mixer truck of the first embodiment. It is a schematic diagram which shows the state in which the electric power feeding part and the electric power receiving part oppose, and the electric power receiving part is located in the magnetic field generated around the electric power feeding part. 3 is a flowchart illustrating a step of obtaining a position of the power receiving unit with respect to the power feeding unit according to the first embodiment and supplying power from the power feeding unit to the power receiving unit. (A) is a perspective view showing a main part, and (B) is a YY cross-sectional view in (A) regarding the mixer of the mixer truck of the second embodiment. 10 is a flowchart illustrating steps for obtaining a position of a power reception unit with respect to a power supply unit according to Embodiment 2 and supplying power from the power supply unit to the power reception unit. (A) is a side view and (B) is a ZZ cross-sectional view in (A) regarding the mixer of the mixer truck of the third embodiment. It is a side view which shows the principal part of the mixer of the mixer truck of Embodiment 4. (A) is a side view showing a main part, and (B) is a WW cross-sectional view in (A) regarding a mixer of a mixer truck of a fifth embodiment. (A) is a side view and (B) is a VV cross-sectional view in (A) regarding the mixer of the mixer vehicle of Embodiment 6. FIG. It is a perspective view which shows the principal part of the mixer of the mixer truck of Embodiment 6.

Next, Embodiments 1 to 6 embodying a mixer vehicle in which the mixer of the present invention is mounted on a support portion of a vehicle body will be described with reference to the drawings.

<Embodiment 1>
As shown in FIG. 1, the mixer vehicle of the first embodiment includes a vehicle body 50, a mixer 10J, a hopper 50C, and a chute 50D.

The vehicle body 50 has a cabin 50A and a gantry 50F. The cabin 50A is provided on the front side of the vehicle body 50 (front and rear are the left and right in FIG. 1, the same applies hereinafter). The gantry 50F is provided on the rear side of the cabin 50A. An engine (not shown) travels the vehicle body 50 and is provided on the lower side of the cabin 50A (upper and lower are the upper and lower in FIG. 1; the same applies hereinafter).

As shown in FIG. 1, the mixer 10 J includes a mixer drum 10, a front support unit 11 F, a rear support unit 11 B, a power transmission unit 30, and a slump sensor 16.

The mixer drum 10 has a drum body 10A, a drive shaft 10B, two drum blades (not shown), and a roller ring 10D. The drum body 10A has a cylindrical shape. The drum main body 10A is provided with an opening 10E having one end opened. Further, the drum body 10A is closed at the other end in the back direction when viewed from one end by a closing portion 10F. The drive shaft 10B is connected to the center of the closing portion 10F and extends outward from the drum body 10A. The drive shaft 10 B extends on the rotation shaft 10 G of the mixer drum 10.

The drive shaft 10B is connected to a speed reducer (not shown). The speed reducer is connected to a hydraulic motor (not shown). The hydraulic motor is connected to a hydraulic pump (not shown) via a pipe (not shown). The hydraulic pump is connected to a vehicle engine (not shown). Thus, the rotational force of the engine is transmitted to the drive shaft 10B via the hydraulic pump, piping, hydraulic motor, and speed reducer to rotate the mixer drum 10.

Each drum blade is helically fixed along the inner peripheral surface of the drum body 10A with a predetermined interval. That is, each drum blade rotates with the drum body 10A. The roller ring 10D has an annular shape and is provided so as to go around the outer surface on the opening 10E side of the drum body 10A.

The rear support portion 11B rotatably supports the mixer drum 10 in a forward tilt posture in which the opening portion 10E of the mixer drum 10 is positioned upward and the opening portion 10E is lifted above the closing portion 10F. Specifically, the rear support portion 11B rotatably supports the roller ring 10D of the mixer drum 10 from below by a plurality of rollers 11A provided at the rear end portion. Further, the front support portion 11F rotatably supports the drive shaft 10B of the mixer drum 10. Thus, the front support portion 11F and the rear support portion 11B pivotally support the mixer drum 10, and the mixer drum 10 rotates about the rotation shaft 10G.

As shown in FIGS. 1 and 2A, the power transmission unit 30 includes a concealing unit 30B, a plurality of power feeding units 30D, a power feeding side control unit 30E, a power feeding side storage battery 30F, and a power receiving unit 30C.

The concealing portion 30B has a cylindrical shape, is provided coaxially with the drive shaft 10B so as to cover the periphery of the drive shaft 10B, and is fixed to the front support portion 11F. A predetermined gap is provided between the inner peripheral surface of the concealing portion 30B and the outer peripheral surface of the drive shaft 10B. Each power feeding unit 30D is a coil in which a metal wire whose surface is covered with an insulating film is coaxially wound a plurality of times and bundled in an annular shape. Further, each of the power supply portions 30D has an annular shape having a width in the radial direction. Each power feeding portion 30D is attached with one end of the annular shape contacting the inner peripheral surface (circumferential surface) of the concealing portion 30B.

In the concealing portion 30B, six power feeding portions 30D are attached in a row in the circumferential direction of the inner peripheral surface with the distance between them being equally spaced. The six power feeding units 30D are associated with values of 0 to 5 in the order in which they are arranged in a line (see FIG. 2B). Specifically, 0 to 5 ID (identification) signals (pulse signals, etc.) corresponding to each of the six power supply units 30D are allocated to the six power supply units 30D. Each power supply section 30D has both ends of the metal wire drawn out long. Each power feeding part 30D is attached to the front support part 11F side.

The power supply side control unit 30E is provided in the front support unit 11F. The power supply side control unit 30E is electrically connected at both ends of a metal wire that is extended from each power supply unit 30D (see FIG. 2B). The power supply side storage battery 30F is adjacent to the power supply side control unit 30E and is provided in the front support unit 11F. The power supply side storage battery 30F is electrically connected to the power supply side control unit 30E. The feeding side control unit 30E is supplied with a direct current from the feeding side storage battery 30F. The power supply side control unit 30E converts this direct current into an alternating current and supplies it to each power supply unit 30D.

The power receiving unit 30C is a coil in which a metal wire whose surface is covered with an insulating film is coaxially wound a plurality of times and bundled in an annular shape. Each of the power receiving units 30C has an annular shape having a width in the radial direction. The power receiving unit 30C has both ends of the metal wire drawn out long. The power receiving unit 30 C is attached such that one end of the annular shape is in contact with the outer peripheral surface of the drive shaft 10 B of the mixer drum 10. That is, the power receiving unit 30C is attached at a position where the other end of the ring faces the other end of the ring of each power feeding unit 30D (see FIG. 2B).

The power receiving unit 30C is attached to the drive shaft 10B of the mixer drum 10 and rotates together with the mixer drum 10. A predetermined interval is provided between the annular other end side of the power receiving unit 30C and the annular other end side of each power feeding unit 30D. The power receiving unit 30C that rotates together with the mixer drum 10 does not come into contact with each power feeding unit 30D. That is, the power receiving unit 30C rotates together with the mixer drum 10 and temporarily faces each power feeding unit 30D.

The slump sensor 16, which is an electrical device, includes an electrode 12 and a control unit 15. The electrode 12 is provided on the inner peripheral surface of the mixer drum 10. The control unit 15 is provided on the outer peripheral surface of the mixer drum 10. The electrode 12 and the control unit 15 are electrically connected to each other through a through hole 17 that penetrates the drum main body 10A in a watertight manner. That is, the slump sensor 16 is attached to the mixer drum 10 and rotates together with the mixer drum 10.

The slump sensor 16 obtains a slump value by the control unit 15 based on a predetermined value such as a resistance value or a capacitance value of ready-mixed concrete measured using the electrode 12. The slump sensor 16 is electrically connected to the control unit 15 at both ends of a metal wire drawn out from the power receiving unit 30C.

The hopper 50C is formed with an input port that opens while expanding upward. The lower end of the hopper 50C is opened in the front lower direction, and a discharge port is formed. Hopper 50 C has a discharge port communicating with the center of opening 10 E of mixer drum 10. The hopper 50C is fixed to the upper portion of the rear support portion 11B. The hopper 50C puts the ready-mixed concrete thrown into the inlet into the mixer drum 10 from the outlet.

The chute 50D is supported by the rear support portion 11B so that the distal end portion thereof is rotatable in the horizontal direction and the vertical direction with the base end portion as the center. The horizontal direction does not necessarily mean a strict horizontal direction, but includes a state slightly deviated from the strict horizontal direction. Thus, the chute 50D guides the ready-mixed concrete discharged from the mixer drum 10 to a desired position.

In this mixer vehicle, the mixer 10J, the hopper 50C, and the chute 50D thus configured are mounted on the upper side of the mount 50F of the vehicle body 50.

Next, the operation of the mixer 10J of this mixer vehicle will be described. The mixer 10J supplies power from each power supply unit 30D to the power reception unit 30C using electromagnetic induction. Specifically, in the mixer 10J, the mixer drum 10 rotates about the rotation shaft 10G and the ready-mixed concrete charged into the mixer drum 10 is agitated. At this time, the power reception unit 30 C and the slump sensor 16 rotate together with the mixer drum 10 on a circumference around the rotation shaft 10 G of the mixer drum 10. At this time, the mixer 10J converts the direct current supplied from the power supply side storage battery 30F into an alternating current by the power supply side control unit 30E and supplies it to each power supply unit 30D. Then, as shown in FIG. 3, an alternating magnetic field M is generated around each power supply unit 30D. The power receiving unit 30C moves in the alternating magnetic field. The power receiving unit 30C is arranged in an alternating magnetic field to generate an induced current.
In this way, the mixer 10J can supply power to each power receiving section 30C on the mixer drum 10 side from each power feeding section 30D on the front support section 11F side by electromagnetic induction.

The AC magnetic field generated around each power feeding unit 30D is the smallest in the middle between adjacent power feeding units 30D. For this reason, when the power receiving unit 30C is positioned in the middle of the adjacent power feeding units 30D, the amount of power supplied to the power receiving unit 30C is minimized. For this reason, the dimension between the adjacent power supply units 30D is set so that the amount of power supplied to the power receiving unit 30C in the middle of the adjacent power supply units 30D is larger than the amount of power necessary to operate the slump sensor 16. ing.

Next, a method for specifying the position of the power receiving unit 30C attached to the mixer 10J and a power feeding method for supplying an alternating current to the power feeding unit 30D will be described. The flowchart shown in FIG. 4 is repeatedly executed by the control unit 15 at predetermined time intervals. The control unit 15 includes a current sensor (not shown). As a result, the control unit 15 repeatedly detects the value of the induced current generated in the power receiving unit 30C every predetermined time and detects it with a current sensor.

First, in order to specify the position of the power receiving unit 30C, it is determined whether or not the specific completion flag (flag) is 0 (step S1). Specifically, a specific completion flag is set in which 1 is set when the position of the power receiving unit 30C is completed, and 0 is set when the position of the power receiving unit 30C is not completed. If 0 is set in the specific completion flag, the process proceeds to step S2. If 1 is set in the specific completion flag, the process proceeds to step S5. This specific completion flag is set to 0 every time the engine of the mixer vehicle is started.

≪Location identification method≫
When the process proceeds to step S2, the value of the induced current generated in the power receiving unit 30C for each power feeding unit 30D is measured. Specifically, alternating current is supplied to the 0th to 5th power feeding units 30D one by one in order. At this time, in order to identify which power supply unit 30D is supplied with the alternating current by the control unit 15, the power reception unit 30C and the power supply unit 30D receive ID signals corresponding to the 0th to 5th power supply units 30D. To the control unit 15. Then, the value of the induced current generated in the power receiving unit 30 C for each power feeding unit 30 D supplied with the alternating current is measured by the current sensor of the control unit 15. For example, when an alternating current is supplied to the 0th power feeding unit 30D, the value of the induced current generated in the power receiving unit 30C becomes the maximum if the power receiving unit 30C faces the 0th power feeding unit 30D. Here, the term “opposite” refers to a state in which the power receiving unit 30C and the power feeding unit 30D are completely facing each other (the same applies hereinafter). Further, if the power receiving unit 30C does not face the 0th power feeding unit 30D, the induced current generated in the power receiving unit 30C varies depending on the amount of the power receiving unit 30C and the 0th power feeding unit 30D facing each other. The control unit 15 obtains an induced current value that is an electrical characteristic value corresponding to the power fed from the power feeding unit 30D to the power receiving unit 30C.

Next, the position of the power receiving unit 30C with respect to each power feeding unit 30D is specified from the value of the induced current generated in the power receiving unit 30C with respect to each power feeding unit 30D (step S3). Specifically, among the values of the induced current generated in the power receiving unit 30C for each power feeding unit 30D (hereinafter referred to as the value of the induced current for the power feeding unit 30D) measured in step S2, the largest value and the next largest value. Based on the ratio of the values, the position of the power receiving unit 30C with respect to the 0th to 5th adjacent power feeding units 30D is obtained. For example, when the value of the induced current for the 0th power feeding unit 30D is the largest and the value of the induced current for the first power feeding unit 30D is the next largest, the power receiving unit 30C straddles the 0th and 1st power feeding units 30D. Thus, the position is close to the 0th power feeding unit 30D. In this way, the position of the power receiving unit 30C with respect to the 0th to 5th power feeding units 30D is specified from the value of the induced current that is the electrical characteristic value. Then, 1 is set in the identification completion flag to indicate that the identification of the position of the power receiving unit 30C has been completed (step S4). As described above, when the position of the power receiving unit 30C with respect to the 0th to 5th power feeding units 30D is specified by the control unit 15, this position information is transmitted to the power feeding side control unit 30E via the power receiving unit 30C and the power feeding unit 30D.

≪Power supply method≫
Next, an alternating current is supplied to the power feeding unit 30D facing the power receiving unit 30C based on the position of the power receiving unit 30C specified in step S3 (step S5). Specifically, an alternating current is supplied to the power feeding unit 30D facing the position of the power receiving unit 30C identified in step S3. Thus, the mixer 10J can supply power to the power reception unit 30C from the power supply unit 30D without supplying unnecessary AC current to the power supply unit 30D that is not opposed to the power reception unit 30C.

Next, it is determined whether the value of the induced current generated in the power receiving unit 30C is smaller than a predetermined value (step S6). Specifically, when the power receiving unit 30C that rotates together with the mixer drum 10 passes through the power supply unit 30D to which an alternating current is supplied, power is not supplied from the power supply unit 30D. That is, by comparing whether the value of the induced current generated in the power receiving unit 30C is smaller than a predetermined value (the predetermined value is stored in the control unit 15 in advance), the power feeding unit 30D to which the alternating current is supplied is received. It can be seen whether the part 30C has passed. If it is determined that the value of the induced current generated in the power receiving unit 30C is smaller than the predetermined value, the process proceeds to step S7, the specific completion flag is set to 0, and the specification of the position of the power receiving unit 30C is completed. Indicates no. If it is determined that the value of the induced current generated in the power receiving unit 30C is not smaller than the predetermined value, the flowchart ends, and the control unit 15 executes the flowchart again from step S1.

As described above, the mixer 10J of this mixer vehicle has a predetermined gap between the power feeding unit 30D attached to the front support portion 11F side and the power receiving unit 30C attached to the mixer drum 10 side. Thereby, even if this mixer 10J rotates when the mixer drum 10 stirs ready-mixed concrete, electric power feeding part 30D and the electric power receiving part 30C do not contact. For this reason, in the mixer 10J, the power receiving unit 30C temporarily opposes the power feeding unit 30D. At this time, the power feeding unit 30D can feed power to the power receiving unit 30C. That is, the mixer 10J does not need to supply power to the slump sensor 16 attached to the mixer drum 10 side from the front support portion 11F side via the power line, and can supply power to the slump sensor 16 with a simple circuit. Furthermore, since this mixer 10J is not affected by the surrounding environment such as time zone and weather unlike a solar power generator, power can be stably supplied to the slump sensor 16 attached to the mixer drum 10. .

Therefore, the mixer 10 J of the mixer vehicle of the first embodiment can satisfactorily supply power to the slump sensor 16 attached to the mixer drum 10 and rotating together with the mixer drum 10.

Further, in this mixer 10J, the front support portion 11F has a cylindrical concealment portion 30B provided coaxially with the drive shaft 10B so as to cover the periphery of the drive shaft 10B of the mixer drum 10. In the power transmission unit 30, the power receiving unit 30C is provided on the outer peripheral surface of the drive shaft 10B of the mixer drum 10, and the power feeding unit 30D is provided on the inner peripheral surface of the concealing unit 30B. For this reason, since this mixer 10J arrange | positions the electric power transmission part 30 in the outer peripheral part of the drive shaft 10B of the mixer drum 10, the electric power transmission part 30 can be reduced in size.

Further, in this mixer 10J, the power transmission unit 30 has a plurality of power feeding units 30D. For this reason, the power transmission unit 30 of the mixer 10J can supply more power from each power feeding unit 30D to the power receiving unit 30C than when one power feeding unit 30D and one power receiving unit 30C are provided.

In addition, the method for supplying power to the power receiving unit 30C attached to the mixer 10J includes a first procedure to a third procedure. In the first procedure, an induced current value corresponding to the power supplied from the power supply unit 30D to the power reception unit 30C is obtained. In the second procedure, the position of the power receiving unit 30C with respect to the power feeding unit 30D is obtained from the value of the induced current obtained in the first procedure. In the third procedure, a current is supplied to the power feeding unit 30D based on the position of the power receiving unit 30C obtained in the second procedure. In addition, the method of supplying power to the power receiving unit 30C returns to the first procedure when the induced current generated in the power receiving unit 30C becomes smaller than a predetermined value. For this reason, in the power feeding method to the power receiving unit 30C, it is not necessary to obtain the position on the circumference of the power receiving unit 30C around the rotating shaft 10G with another sensor. In addition, if the position of the power receiving unit 30C with respect to the power feeding unit 30D can be specified, power supply to the power feeding unit 30D can be performed with good timing according to the position of the power receiving unit 30C with respect to the power feeding unit 30D. Power consumption can be reduced.

<Embodiment 2>
As shown in FIGS. 5 (A) and 5 (B), the mixer vehicle of the second embodiment has one power supply unit 30D, the mixer drum 10 has a power storage battery 14, and the mixer 10J. The position specifying method and the power feeding method of the power receiving unit 30C attached to the battery are different from those of the first embodiment. Other configurations are the same as those of the first embodiment, and the same configurations as those of the first embodiment are denoted by the same reference numerals and detailed description thereof is omitted.

One feeding portion 30D is attached with one end of the annular shape coming into contact with the inner peripheral surface of the concealing portion 30B (see FIG. 5B). In the power feeding unit 30D, both ends of the metal wire are drawn out long and are electrically connected to the power feeding side control unit 30E (see FIG. 5B). The power receiving side storage battery 14 is provided on the outer peripheral surface of the mixer drum 10, and is attached adjacent to the control unit 15 of the slump sensor 16. The power receiving side storage battery 14 is electrically connected to the control unit 15.

Next, the operation of the mixer 10J of this mixer vehicle will be described. The power supply side control unit 30E converts the direct current supplied from the power supply side storage battery 30F into an alternating current and supplies the alternating current to the power supply unit 30D. Then, an alternating magnetic field is generated around the power feeding unit 30D. The power receiving unit 30C and the slump sensor 16 rotate together with the mixer drum 10 on a circumference around the rotation shaft 10G of the mixer drum 10 to periodically face the power feeding unit 30D. That is, the mixer 10J can feed power from the power feeding unit 30D to the power receiving unit 30C while the power receiving unit 30C and the power feeding unit 30D are facing each other. That is, the mixer 10J is not constantly supplied with power from the power supply unit 30D to the power reception unit 30C.

The mixer 10J supplies power to the power-receiving-side storage battery 14 from the power receiving unit 30C via the control unit 15 while charging the power receiving unit 30C from the power supplying unit 30D. Thus, the mixer 10J can operate the slump sensor 16 using the electric power stored in the power receiving side storage battery 14 while the power receiving unit 30D is not supplying power to the power receiving unit 30C. In this case, the capacity that can be stored by the power storage battery 14 must be larger than the power consumed by the slump sensor 16 while the mixer drum 10 rotates once. Further, the amount that the power feeding unit 30D and the power receiving unit 30C confront each other to feed and charge the power receiving side storage battery 14 must be larger than the power consumed by the slump sensor 16 while the mixer drum 10 rotates once.

Next, the position specifying method and power feeding method of the power receiving unit 30C attached to the mixer 10J will be described. The flowchart shown in FIG. 6 is repeatedly executed by the control unit 15 at predetermined time intervals. The control unit 15 includes a current sensor (not shown). Thereby, the control unit 15 repeats the value of the induced current generated in the power receiving unit 30C at every predetermined time, and is detected by the current sensor.

First, in order to specify the position of the power receiving unit 30C, it is determined whether or not the specific completion flag is 0 (step S11). Specifically, a specific completion flag is set in which 1 is set when the position of the power receiving unit 30C is completed, and 0 is set when the position of the power receiving unit 30C is not completed. If 0 is set in the specific completion flag, the process proceeds to step S12. If 1 is set in the specific completion flag, the process proceeds to step S14. This specific completion flag is set to 0 every time the engine of the mixer vehicle is started.

≪Location identification method≫
When the process proceeds to step S12, the state where the power receiving unit 30C and the power feeding unit 30D are opposed to each other is specified, and the state at that time is stored. The method for specifying the position of the power receiving unit 30C attached to the mixer 10J is to obtain a state in which the value of the induced current generated in the power receiving unit 30C is maximized by rotating the mixer drum 10 once with the alternating current supplied to the power feeding unit 30D. . That is, the state where the value of the induced current generated in the power receiving unit 30C is the maximum is the state where the power receiving unit 30C and the power feeding unit 30D face each other. Specifically, it is determined whether the value of the induced current is larger than a predetermined value (the predetermined value is stored in the control unit 15 in advance). If it is determined that the value of the induced current is greater than the predetermined value, it is determined whether the induced current value has continued to increase and then started to decrease. When it is determined that the value of the induced current has started to decrease, it is determined that the state (maximum value) immediately before starting the decrease is a state in which the power receiving unit 30C and the power feeding unit 30D face each other, and the power receiving unit at this time The position of 30C is stored in the control unit 15. Then, 1 is set in the identification completion flag to indicate that the identification of the position of the power receiving unit 30C is completed, and the supply of the alternating current to the power feeding unit 30D is stopped (step S13).

≪Power supply method≫
Next, based on the position of the power receiving unit 30C specified in step S12, it is determined whether the power receiving unit 30C is facing the power feeding unit 30D when the mixer drum is rotating (step S14). Specifically, it is determined whether or not the power feeding unit 30D and the power receiving unit 30C stored in the control unit 15 are in the vicinity of the position facing each other in step S12. When the power feeding unit 30D and the power receiving unit 30C are in the vicinity of the facing position, the process proceeds to step S15. When the power feeding unit 30D and the power receiving unit 30C are not in the vicinity of the facing position, the process proceeds to step S16.

When the process proceeds to step S15, supply of alternating current to the power feeding unit 30D is started. In this way, power is supplied from the power supply unit 30D to the power reception unit 30C. And the control part 15 performs a flowchart again from step S11.

When the process proceeds to step S16, the supply of the alternating current to the power feeding unit 30D is stopped. Specifically, if the power feeding unit 30D and the power receiving unit 30C are not confronted with each other, power cannot be supplied from the power feeding unit 30D to the power receiving unit 30C. Reduce consumption. And the control part 15 performs a flowchart again from step S11.

Thus, the mixer 10J of this mixer vehicle also has a predetermined gap between the power feeding unit 30D attached to the front support portion 11F side and the power receiving unit 30C attached to the mixer drum 10 side. Thereby, even if this mixer 10J rotates when the mixer drum 10 stirs ready-mixed concrete etc., the electric power feeding part 30D and the electric power receiving part 30C do not contact. For this reason, in the mixer 10J, the power receiving unit 30C temporarily opposes the power feeding unit 30D. At this time, the power feeding unit 30D can feed power to the power receiving unit 30C. That is, the mixer 10J does not need to supply power to the slump sensor 16 attached to the mixer drum 10 side from the front support portion 11F side via the power line, and can supply power to the slump sensor 16 with a simple circuit. Furthermore, since this mixer 10J is not affected by the surrounding environment such as time zone and weather unlike a solar power generator, power can be stably supplied to the slump sensor 16 attached to the mixer drum 10. .

Therefore, the mixer 10J of the mixer vehicle of the second embodiment can also supply power to the slump sensor 16 attached to the mixer drum 10 and rotating together with the mixer drum 10.

Further, in this mixer 10J, the front support portion 11F has a cylindrical concealment portion 30B provided coaxially with the drive shaft 10B so as to cover the periphery of the drive shaft 10B of the mixer drum 10. In the power transmission unit 130, the power receiving unit 30C is provided on the outer peripheral surface of the drive shaft 10B of the mixer drum 10, and the power feeding unit 30D is provided on the inner peripheral surface of the concealing unit 30B. For this reason, since this mixer 10J arrange | positions the electric power transmission part 130 in the outer peripheral part of the drive shaft 10B of the mixer drum 10, the electric power transmission part 130 can be reduced in size.

In addition, the method for supplying power to the power receiving unit 30C attached to the mixer 10J includes a first procedure to a third procedure. In the first procedure, an induced current value corresponding to the power supplied from the power supply unit 30D to the power reception unit 30C is obtained. In the second procedure, the position of the power receiving unit 30C with respect to the power feeding unit 30D is obtained from the value of the induced current obtained by the first means. In the third procedure, a current is supplied to the power feeding unit 30D based on the position of the power receiving unit 30C obtained in the second procedure. In addition, the method of supplying power to the power receiving unit 30C returns to the first procedure when the induced current generated in the power receiving unit 30C becomes smaller than a predetermined value. For this reason, in the power feeding method to the power receiving unit 30C, it is not necessary to obtain the position on the circumference of the power receiving unit 30C around the rotating shaft 10G with another sensor. In addition, if the position of the power receiving unit 30C with respect to the power feeding unit 30D can be specified, the power can be supplied to the power feeding unit 30D with good timing depending on the position of the power receiving unit 30C with respect to the power feeding unit 30D. Consumption can be suppressed.

Further, this mixer 10J includes one power feeding unit 30D and one power receiving unit 30C. The power receiving unit 30C rotates together with the mixer drum 10 and periodically faces the power feeding unit 30D. Therefore, the mixer 10J can determine the rotation speed of the mixer drum 10 based on the value of the induced current generated in the power receiving unit 30C that periodically changes.

<Embodiment 3>
As shown in FIGS. 7A and 7B, the mixer vehicle of the third embodiment has a power supply support member 30J, and has six power supply portions 30D arranged on the power supply support member 30J. The positions at which the power receiving unit 30C is arranged on the mixer drum 10 are different from those in the first and second embodiments. The same configurations as those of the first and second embodiments are denoted by the same reference numerals, and detailed description thereof is omitted.

The power transmission unit 230 includes a power supply support member 30J. The power supply support member 30J has a semi-cylindrical shape. The power supply support member 30J is provided coaxially with the mixer drum 10 so as to cover the lower portion of the intermediate portion of the outer peripheral surface of the mixer drum 10, and is fixed on the gantry 50F. That is, the power supply support member 30 J extends along the circumferential direction of the mixer drum 10.

A predetermined gap is provided between the power supply support member 30J and the mixer drum 10. Each of the power supply portions 30D is arranged in a row with one end side of the annular shape abutting on the semi-cylindrical inner peripheral surface of the power supply support member 30J and with the same distance between each other in the circumferential direction of the power supply support member 30J. Has been. The power receiving unit 30 C is attached such that one end of the annular shape is in contact with the outer peripheral surface of the mixer drum 10.

The power receiving unit 30C rotates together with the mixer drum 10 and temporarily confronts the other end of the ring with the other end of the ring of each power feeding unit 30D. The power receiving unit 30C rotates together with the mixer drum 10 with a predetermined gap between each power feeding unit 30D and does not come into contact with each power feeding unit 30D.

As described above, the mixer 10J of this mixer vehicle also has a predetermined gap between the power feeding unit 30D attached to the power feeding support member 30J side and the power receiving unit 30C attached to the mixer drum 10 side. Thereby, even if this mixer 10J rotates when the mixer drum 10 stirs ready-mixed concrete etc., the electric power feeding part 30D and the electric power receiving part 30C do not contact. For this reason, in the mixer 10J, the power receiving unit 30C temporarily opposes the power feeding unit 30D. At this time, the power feeding unit 30D can feed power to the power receiving unit 30C. That is, the mixer 10J does not need to supply power to the slump sensor 16 attached to the mixer drum 10 side from the power supply support member 30J side via the power line, and can supply power to the slump sensor 16 with a simple circuit. Furthermore, since this mixer 10J is not affected by the surrounding environment such as time zone and weather unlike a solar power generator, power can be stably supplied to the slump sensor 16 attached to the mixer drum 10. .

Therefore, the mixer 10J of the mixer truck of the third embodiment can also supply power to the slump sensor 16 attached to the mixer drum 10 and rotating together with the mixer drum 10.

In the mixer 10J, the power transmission unit 230 includes a power receiving unit 30C provided on the outer peripheral surface of the mixer drum 10. In addition, the power transmission unit 230 includes a power supply support member 30J that extends along the circumferential direction of the mixer drum 10 and is disposed at a position where the power supply unit 30D temporarily faces the power reception unit 30C. For this reason, when the mixer drum 10 rotates, the mixer 10J receives power from the power feeding unit 30D compared to the case where the power feeding unit 30D is provided around the drive shaft 10B and the power receiving unit 30C is provided on the outer peripheral surface of the drive shaft. The part 30C can be passed quickly. When power is supplied from the power feeding unit 30D to the power receiving unit 30C by electromagnetic induction, the amount of magnetic flux penetrating the power receiving unit 30C changes rapidly when the power receiving unit 30C passes through the AC magnetic field generated around the power feeding unit 30D. The induced current generated in the power receiving unit 30C increases. For this reason, the power transmission unit 230 of the mixer 10J can supply more power from the power feeding unit 30D to the power receiving unit 30C.

Further, in this mixer 10J, the power transmission unit 230 has a plurality of power feeding units 30D. For this reason, the power transmission unit 230 of the mixer 10J can supply more power from the power feeding unit 30D to the power receiving unit 30C than when one power receiving unit 30C and one power feeding unit 30D are provided.

<Embodiment 4>
As shown in FIG. 8, the mixer vehicle of the fourth embodiment is different from the first to third embodiments in the position where the power feeding unit 30D is disposed and the position where the power receiving unit 30C is disposed. The same components as those in the first to third embodiments are denoted by the same reference numerals, and detailed description thereof is omitted.

The mixer drum 110 connects the front end of the drive shaft 110B to the speed reducer 70. The speed reducer 70 includes a first gear 70A and a second gear 70B. The first gear 70A and the second gear 70B are spur gears. In the first gear 70A, the tip of the drive shaft 110B is inserted coaxially with the drive shaft 110B. The second gear 70B meshes with the first gear 70A and is disposed below the first gear 70A. The second gear 70B has an outer diameter smaller than that of the first gear 70A. The second gear 70 B is coaxially connected to the output shaft 72 of the hydraulic motor 71.

The power feeding unit 30D is attached such that one end side of the annular shape is in contact with the rear end surface of the front support unit 111F. The power feeding unit 30 D is disposed coaxially with the rotation shaft 10 G of the mixer drum 110. The power supply unit 30D has both ends of the metal wire drawn out long, is laid inside the front support unit 11F, and is electrically connected to the power supply side control unit 30E.

The power receiving unit 30C is attached such that one end of the annular shape comes into contact with the front end surface of the drive shaft 110B. The power receiving unit 30 C is disposed coaxially with the rotation shaft 10 G of the mixer drum 110. In the power receiving unit 30C, the other end of the ring is opposed to the other end of the ring of the power feeding unit 30D. The power receiving unit 30 C has both ends of the metal wire drawn out long, is laid on the inside of the drive shaft 110 B and the outer surface of the mixer drum 110, and is electrically connected to the control unit 15 of the slump sensor 16.

The power receiving unit 30 C rotates around the rotation shaft 10 G together with the drive shaft 110 B of the mixer drum 110. The power receiving unit 30C that rotates together with the drive shaft 110B of the mixer drum 110 does not contact the power feeding unit 30D. In the mixer 110J, even when the mixer drum 110 rotates, the power receiving unit 30C and the power feeding unit 30D are always opposed to each other. For this reason, in this mixer 110J, the power receiving unit 30C is always located in the AC magnetic field generated around the power feeding unit 30D to which the AC current is supplied. Thus, the mixer 110J can always supply power from the power supply unit 30D to the power reception unit 30C.

Thus, the mixer 110J of this mixer vehicle also has a predetermined interval between the power feeding unit 30D attached to the front support portion 111F side and the power receiving unit 30C attached to the mixer drum 110 side. Thereby, even if this mixer 110J rotates when the mixer drum 110 agitates ready mixed concrete etc., the electric power feeding part 30D and the electric power receiving part 30C do not contact. For this reason, in the mixer 110J, the power receiving unit 30C always faces the power feeding unit 30D. At this time, the power feeding unit 30D can feed power to the power receiving unit 30C. That is, the mixer 110J does not need to supply power to the slump sensor 16 attached to the mixer drum 110 side from the front support portion 111F via the power line, and can supply power to the slump sensor 16 with a simple circuit. Furthermore, since this mixer 110J is not affected by the surrounding environment such as time zone and weather unlike a solar power generator, it can stably supply power to the slump sensor 16 attached to the mixer drum 110. .

Therefore, the mixer 110J of the mixer vehicle of the fourth embodiment can also supply power to the slump sensor 16 attached to the mixer drum 110 and rotating together with the mixer drum 110.

<Embodiment 5>
As shown in FIGS. 9A and 9B, in the mixer vehicle of the fifth embodiment, the configuration of the opening 110E of the mixer drum 210, the position where the power feeding unit 30D is disposed, and the position where the power receiving unit 30C is disposed are the first embodiment. Different from ~ 4. The same components as those in the first to fourth embodiments are denoted by the same reference numerals, and detailed description thereof is omitted.

The mixer drum 210 has an opening member 10H. The opening member 10H has a cylindrical shape having the same diameter as the opening 110E of the mixer drum 210, and both ends are open and communicated. The opening member 10 H is fixed by contacting one end of the opening member 10 E with the opening 110 E of the mixer drum 210. The power supply support member 130J has a cylindrical shape, and both ends are open and communicated. The power supply support member 130J is provided coaxially with the mixer drum 210 so as to cover the periphery of the opening member 10H, and is attached to the rear support portion 11B. A predetermined interval is provided between the power supply support member 130J and the opening member 10H.

The ten power supply portions 30D are attached in a row with one end of the annular shape abutting against the inner peripheral surface of the power supply support member 130J and with the same distance between each other in the circumferential direction of the power supply support member 130J. ing. Each power supply section 30D has both ends of the metal wire drawn out long, is laid on the rear support section 11B and the gantry 50F, and is electrically connected to the power supply side control section 30E (not shown). The power receiving unit 30 C abuts one end of the annular shape on the outer peripheral surface of the opening member 10 H of the mixer drum 210. The power receiving unit 30 C has both ends of the metal wire drawn out long, is laid on the outer surface of the mixer drum 210, and is electrically connected to the control unit 15 of the slump sensor 16.

The power receiving unit 30C rotates together with the mixer drum 210 and temporarily confronts the other end of the ring with the other end of the ring of each power feeding unit 30D. The power receiving unit 30C rotates together with the mixer drum 210 with a predetermined gap between each power feeding unit 30D and does not come into contact with each power feeding unit 30D.

As described above, the mixer 210J of this mixer vehicle is also provided with a predetermined gap between the power feeding portion 30D attached to the power feeding support member 130J attached to the rear support portion 11B and the power receiving portion 30C attached to the mixer drum 210 side. There is an interval. Thereby, even if this mixer 210J rotates when the mixer drum 210 agitates ready mixed concrete etc., the electric power feeding part 30D and the electric power receiving part 30C do not contact. For this reason, in the mixer 210J, the power receiving unit 30C temporarily opposes the power feeding unit 30D. At this time, the power feeding unit 30D can feed power to the power receiving unit 30C. That is, the mixer 210J does not need to supply power to the slump sensor 16 attached to the mixer drum 210 side from the rear support portion 11B side via the power line, and can supply power to the slump sensor 16 with a simple circuit. Further, since this mixer 210J is not affected by the surrounding environment such as time zone and weather unlike a solar power generator, it can stably supply power to the slump sensor 16 attached to the mixer drum 210. .

Therefore, the mixer 210J of the mixer truck of the fifth embodiment can also supply power to the slump sensor 16 attached to the mixer drum 210 and rotating together with the mixer drum 210.

Further, in this mixer 210J, the power transmission unit 330 is provided in the opening 110E in which the power receiving unit 30C is the outer peripheral surface of the mixer drum 210. In addition, the power transmission unit 330 includes a power supply support member 130J that extends along the circumferential direction of the opening member 10H of the mixer drum 210 and is disposed at a position where the power supply unit 30D temporarily faces the power reception unit 30C. For this reason, the mixer 210J has a power feeding unit 30D around the drive shaft 10B when the mixer drum 210 rotates, and the power feeding unit 30D compared to the case where the power receiving unit 30C is provided on the outer peripheral surface of the drive shaft 10B. The power receiving unit 30C can be passed quickly. When power is supplied from the power feeding unit 30D to the power receiving unit 30C by electromagnetic induction, the amount of magnetic flux penetrating the power receiving unit 30C changes rapidly when the power receiving unit 30C passes through the AC magnetic field generated around the power feeding unit 30D. The induced current generated in the power receiving unit 30C increases. For this reason, the power transmission unit 330 of the mixer 210J can supply more power from the power feeding unit 30D to the power receiving unit 30C.

Further, in the mixer 210J of this mixer vehicle, the power transmission unit 330 has a plurality of power feeding units 30D. For this reason, the power transmission unit 330 of the mixer 210J can supply more power from the power feeding unit 30D to the power receiving unit 30C than when one power receiving unit 30C and one power feeding unit 30D are provided.

<Embodiment 6>
As shown in FIGS. 10A, 10B, and 11, the mixer vehicle of the sixth embodiment includes the configuration of the opening 210E of the mixer drum 310, the position where the power feeding unit 30D is disposed, and the position where the power receiving unit 30C is disposed. Different from the first to fifth embodiments. The same components as those in the first to fifth embodiments are denoted by the same reference numerals, and detailed description thereof is omitted.

The mixer drum 310 has a power receiving support member 10K at the opening 210E. The power receiving support member 10K includes a disk-shaped power receiving support portion main body 10L and three cylindrical power receiving connection portions 10M that are elongated. The power receiving support body 10L is provided at the center of the opening 210E of the mixer drum 310. The power receiving support portion main body 10L is arranged so that the central axis is coaxial with the rotation shaft 10G.

Each power receiving connecting portion 10M is connected at one end to the outer peripheral portion of the power receiving supporting portion main body 10L at an angle of 120 degrees. Each power receiving connection portion 10 M is connected to the inner peripheral surface of the opening 210 E that is one end portion of the mixer drum 310 at the other end. Further, the mixer drum 310 is provided with a through-hole 10N that penetrates at a place where the other end of the power receiving connecting portion 10M extending upward from the power receiving supporting body 10L is connected. The through hole 10N communicates with the other end of the power receiving connecting portion 10M extending upward from the power receiving supporting portion main body 10L.

The power receiving unit 30C is attached such that one end of the ring shape comes into contact with the disk-shaped rear surface of the power receiving support main body 10L. The power receiving unit 30 C is disposed coaxially with the rotation shaft 10 G of the mixer drum 310. The power receiving unit 30C is electrically connected to the control unit 15 of the slump sensor 16 with both ends of the metal wire drawn out long. The drawn metal wire is laid on the inner side of the power receiving connection portion 10M extending upward from the power receiving support portion main body 10L, the through hole 10N of the mixer drum 310, and the outer surface of the mixer drum 310. Further, the roller ring 10D is provided with a groove 10P in one portion of the inner periphery. The metal wire drawn out from the power receiving unit 30C passes through the groove 10P.

The hopper 150C has a power supply support member 230J. The power supply support member 230J includes a disk-shaped power supply support portion main body 230K and two long cylindrical power supply connection portions 230L. The power supply support portion main body 230K is disposed at the center of a discharge port 150G formed by opening in the front lower direction at the lower end of the hopper 150C. The power supply support body 230K is arranged so that the central axis is coaxial with the rotation shaft 10G of the mixer drum 310.

Each power supply connecting portion 230L is connected to the outer peripheral portion of the power supply support portion main body 230K on a straight line with the power supply support portion main body 230K interposed therebetween. Further, the other end of each power supply connecting portion 230L is connected to the lower part of the left side wall 150L and the right side wall 150R (left and right in FIG. 11) of the hopper 150C. Further, the left side wall 150L of the hopper 150C is provided with a through hole 150D penetrating in a place where the power feeding connecting portion 230L is connected. The through hole 150D communicates with the other end of the power feeding connecting portion 230L to which the other end of the left side wall 150L of the hopper 150C is connected.

The power feeding unit 30D is attached with one end of the annular shape coming into contact with the front surface of the power feeding support body 230K. The power feeding unit 30 D is disposed coaxially with the rotation shaft 10 G of the mixer drum 310. The power supply unit 30D is electrically connected to a power supply side control unit (not shown) with both ends of the metal wire drawn out long. The drawn metal wire is laid on the inside of one power supply connecting portion 230L, the through hole 150D of the hopper 150C, the rear support portion 11B, and the mount 50F.

The power receiving unit 30C rotates around the rotating shaft 10G together with the mixer drum 310. The power receiving unit 30C that rotates together with the mixer drum 310 does not come into contact with the power feeding unit 30D. In the mixer 310J, the power receiving unit 30C and the power feeding unit 30D are always opposed to each other even when the mixer drum 310 rotates. For this reason, in this mixer 310J, the power receiving unit 30C is always located in the AC magnetic field generated around the power feeding unit 30D to which the AC current is supplied. Thus, the mixer 310J can always supply power from the power supply unit 30D to the power reception unit 30C.

As described above, the mixer 310J of this mixer vehicle also includes a power feeding unit 30D attached to the power feeding support member 230J attached to the rear support unit 11B via the hopper 150C, and a power receiving unit 30C attached to the mixer drum 310 side. There is a predetermined interval between the two. Thereby, even if this mixer 310J rotates when the mixer drum 310 agitates ready mixed concrete etc., the electric power feeding part 30D and the electric power receiving part 30C do not contact. For this reason, in the mixer 310J, the power receiving unit 30C always faces the power feeding unit 30D. At this time, the power feeding unit 30D can feed power to the power receiving unit 30C. That is, the mixer 310J does not need to supply power to the slump sensor 16 attached to the mixer drum 310 side from the rear support portion 11B side via the power line, and can supply power to the slump sensor 16 with a simple circuit. Furthermore, since this mixer 310J is not affected by the surrounding environment such as time zone and weather unlike a solar power generator, it can stably supply power to the slump sensor 16 attached to the mixer drum 310. .

Therefore, the mixer 310J of the mixer vehicle of the sixth embodiment can also supply power to the slump sensor 16 attached to the mixer drum 310 and rotating together with the mixer drum 310.

<Other embodiments>
The present invention is not limited to the first to sixth embodiments described with reference to the above description and the drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) In the first to sixth embodiments, the power supply unit and the power reception unit use a coil in which a metal wire is coaxially wound a plurality of times and bundled into an annular shape. However, the present invention is not limited to this, and the metal wire has a rectangular shape. A coil that is wound a plurality of times and bundled into a quadrangular ring shape may be used for the power feeding unit and the power receiving unit. In this case, when a plurality of power feeding units are arranged, the power feeding units can be arranged without gaps, so that a large amount of power is supplied to the power receiving unit when the power receiving unit is located in the middle of adjacent power feeding units. can do.
(2) In the first to sixth embodiments, a coil in which a metal wire is coaxially wound a plurality of times with a diameter in a predetermined range and bundled into an annular shape is used for the power supply unit. May be used.
(3) In the first to sixth embodiments, power is supplied from the power feeding unit to the power receiving unit by electromagnetic induction. However, the present invention is not limited thereto, and power may be supplied from the power feeding unit to the power receiving unit by a magnetic resonance method or the like.
(4) In the first to sixth embodiments, there is one power receiving unit. However, the present invention is not limited to this, and a plurality of power receiving units may be provided. In this case, any one of the power feeding units and the power receiving unit can always face each other. Thereby, it is possible to supply power to the slump sensor more stably.

(5) In the first, third, and fifth embodiments, the plurality of power feeding units are arranged in a line in the circumferential direction of the inner peripheral surface of the concealing unit or the power feeding support member. Two or more rows may be arranged in the circumferential direction of the inner peripheral surface of the power supply support member. In this case, the power feeding units in adjacent rows are arranged so as not to be parallel to the rotation axis of the mixer drum, and the power receiving units are arranged one by one in each power feeding unit row so as to face each row. At this time, adjacent power receiving units are arranged in parallel to the rotation axis of the mixer drum. By doing so, the amount of the power feeding unit and the power receiving unit facing each other can be changed in adjacent rows. Thereby, it is possible to supply power to the slump sensor more stably.
(6) In

Embodiments

1 and 2, the power feeding unit is disposed outside the power receiving unit. However, the configuration is not limited thereto, and the power receiving unit may be disposed outside the power feeding unit. Further, although the power feeding unit and the power receiving unit are opposed to each other in the direction perpendicular to the drive axis, they may be opposed to each other in parallel with the drive axis or at a predetermined angle with respect to the drive axis. For example, the power receiving unit may be provided on the outer peripheral surface formed in a truncated cone shape at the front end or rear end of the mixer drum.
(7) In the first embodiment, the rotational force obtained from the engine as the power source is transmitted to the mixer drum, but the power source may not be the engine, and the rotational force obtained from the electric motor or the like is used as the power source. It may be used as
(8) In the first to sixth embodiments, the mixer vehicle is used. However, the present invention is not limited to this, and a mixer in which a front support portion and a rear support portion are installed at a work site and the mixer drum is rotatably mounted may be used. . In this case, the rotational force for rotating the mixer drum may be obtained from an electric motor or the like.

(9) In the first to sixth embodiments, the number of slump sensors is one, but the number of slump sensors may not be one and may be two or more.
(10) In Embodiment 1, the ready-mixed concrete is agitated by the mixer drum. However, the present invention is not limited to this, and various agglomerates and liquids may be agitated or kneaded by the mixer drum.
(11) In the first to sixth embodiments, the slump sensor is provided on the inner peripheral surface and the outer peripheral surface of the mixer drum. However, the present invention is not limited to this, and the slump sensor may be provided anywhere on the inner surface and the outer surface of the mixer drum. .
(12) In the first to sixth embodiments, the slump sensor is provided on the mixer drum. However, the slump sensor may not be provided, and another electric device such as a tachometer may be provided on the mixer drum.
(13) In the first to sixth embodiments, the power supply side storage battery is provided. However, the present invention is not limited to this, and a vehicle body battery may be used as the power supply side storage battery.
(14) Although the power receiving side storage battery is provided in the second embodiment, a large-capacity capacitor or the like may be used as the power receiving side storage battery.
(15) In the first to sixth embodiments, the components of the power transmission unit are separately assembled, but these components may be unitized.

(16) In the first embodiment, the position of the power receiving unit with respect to the 0th to 5th power feeding units is obtained. Also, the timing control of the power supply to the power feeding unit may be performed. Specifically, first, the position information of the power receiving unit facing one of the adjacent power feeding units is stored in the control unit. Next, the time required for the power receiving unit to reach the position facing the other side from the position facing one of the adjacent power feeding units is obtained and stored in the control unit. Next, the position information of the power receiving unit facing the other of the adjacent power feeding units is stored in the control unit. The time required for the power receiving unit to change from the state facing one of the adjacent power feeding units to the state facing the other when the power receiving unit is opposed to one and the other of the adjacent power feeding units. Divide by to find the rotation speed of the mixer drum. By switching the AC current supplied to the 0th to 5th power feeding units based on the rotation speed of the mixer drum thus obtained, the AC current can be always supplied to the power feeding unit facing the power receiving unit. At this time, if there is no change in the rotation speed of the mixer drum, it is not necessary to obtain the position of the power receiving unit with respect to the 0th to 5th power feeding units again.

(17) In the first and second embodiments, the position of the power receiving unit with respect to the power feeding unit is specified based on the magnitude of the induced current generated in the power receiving unit. However, the present invention is not limited to this, and a biaxial acceleration sensor or the like is used. Then, the position of the power receiving unit with respect to the power feeding unit may be specified. In this case, the biaxial acceleration sensor is provided on the outer peripheral surface of the mixer drum and rotates together with the mixer drum. The biaxial acceleration sensor rotates with the mixer drum, outputs a value corresponding to the position of the biaxial acceleration sensor as an output value, and gives it to the control unit. That is, the output value of the biaxial acceleration sensor when the value of the induced current generated in the power receiving unit rotating with the mixer drum is maximized is stored in the control unit. Then, by comparing the output value stored in the control unit with the output value corresponding to the current position of the biaxial acceleration sensor, it is determined whether the power feeding unit 30D and the power receiving unit 30C are in the vicinity of the facing position. To do.

(18) In the first embodiment, the position of the power receiving unit with respect to the 0th to 5th power feeding units is specified by the control unit. However, the present invention is not limited to this, and the value of the induced current is transmitted from the control unit to the power feeding side control unit. Then, the position of the power receiving unit with respect to the 0th to 5th power feeding units may be specified by the power feeding side control unit.

10, 110, 210, 310 ... mixer drum, 10B, 110B ... drive shaft, 11F, 111F ... front support part (support part), 11B ... rear support part (support part), 16 ... slump sensor (electric equipment), 30C ... Power receiving unit, 30D ... Power feeding unit, 30, 130, 230, 330 ... Power transmission unit, 30B ... Concealing unit, 30J, 130J ... Power feeding support member

Claims

A support part;
A mixer drum having a drive shaft rotatably supported by the support portion, and rotating about the drive shaft;
Electrical equipment attached to the mixer drum;
A power receiving unit that is attached to the mixer drum and supplies electric power to the electric device, and a power receiving unit that is attached to the support unit and is temporarily or constantly attached to the power receiving unit with a predetermined space between the power receiving unit and the power receiving unit. A power transmission unit having a power feeding unit facing and feeding the power receiving unit;
A mixer characterized by comprising.
The support portion has a cylindrical concealing portion provided coaxially with the drive shaft so as to cover the periphery of the drive shaft of the mixer drum,
The power transmission unit is
The power receiving unit is provided on an outer peripheral surface of the drive shaft of the mixer drum;
The mixer according to claim 1, wherein the power feeding unit is provided on an inner peripheral surface of the concealing unit.
The power transmission unit is
The power receiving unit is provided on an outer peripheral surface of the mixer drum;
2. The mixer according to claim 1, further comprising a power supply support member that extends along a circumferential direction of the mixer drum and that is disposed at a position where the power supply unit temporarily faces the power reception unit.
The power transmission unit is
4. The mixer according to claim 1, wherein the mixer includes at least one of the power receiving unit and the power feeding unit. 5.
A method for feeding power to a power receiving unit attached to the mixer according to any one of claims 1 to 3,
A first procedure for obtaining an electrical characteristic value corresponding to the power fed from the power feeding unit to the power receiving unit;
A second procedure for determining a position of the power receiving unit with respect to the power feeding unit from the electrical characteristic value;
A third procedure for supplying current to the power supply unit based on the position of the power receiving unit obtained in the second procedure;
With
When the electrical characteristic value becomes smaller than a predetermined value, the method returns to the first procedure.