Motor-operated valve

Abstract

To provide a motor-operated valve that can facilitate a work of assembling a rotation sensor and reduce cost of equipment.SOLUTION: A motor-operated valve 100 includes: a fitting part 111 to which a rotation sensor 101 including a sensor body 103 and a lead wire 102 is fitted; and an input-output wiring part 130 which is at least partially disposed in the fitting part 111 and to which the lead wire 102 is connected. The wiring part 130 includes a nipping part 131 for nipping the lead wire 102.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a motorized valve equipped with a rotation sensor. [Background technology]

[0002] Conventionally, as described in Patent Document 1, an electric valve that adjusts the flow rate according to a predetermined condition has been used. The electric valve has a cooling water inlet and a plurality of outlets for sending out the inflow cooling water, and the cooling water is sent to each device through pipes connected to the respective outlets. The above document discloses an application example of an automobile cooling water to an electric valve. The electric valve is provided in a cylinder head of an engine, and cooling water is introduced into the electric valve through an inflow passage. The electric valve has a motor, a valve body that is controlled to open and close by the motor via a reduction mechanism, and a housing. The valve body is rotationally controlled, and the valve opens and closes according to the rotation angle of the valve body. The cooling water is sent from the electric valve to a heating heat exchanger, an oil cooler, and a radiator with the amount of delivery adjusted by the valve body. The electric valve is electrically controlled by a control device according to the cooling water temperature, the vehicle operating state, and the like.

[0003] The control device controls the valve opening based on the rotation angle of the valve disc around the rotation axis. The motor-operated valve is provided with a rotation sensor. The rotation angle of the valve disc is detected by this rotation sensor. The rotation sensor is sometimes placed in a limited space inside the cover on the top of the motor-operated valve housing to avoid interference with the rotating shaft that rotates the valve disc, etc. The rotation sensor comprises a sensor body and lead wires. The sensor body is fixed to the cover, which is part of the motor-operated valve housing, and the lead wires are connected to terminals provided on the cover. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2015-218763 A Summary of the Invention [Problem to be solved by the invention]

[0005] As a method for fixing the rotation sensor to the cover, for example, insert molding is used in which the rotation sensor is inserted in the mold beforehand when the cover is molded with resin. However, since the rotation sensor cannot withstand the high temperatures during insert molding as it is, it is necessary to cover it with another resin at a temperature that the rotation sensor can withstand before insert molding, and then insert the resin-covered rotation sensor into the mold for the cover to mold the lid member, which is called two-color molding. However, two-color molding increases the cost of the mold and the number of steps.

[0006] In addition, there are methods for connecting the lead wires and the wiring for input and output, such as laser welding, resistance welding, and crimping, but all of these require the lead wires and wiring to be sandwiched between a base and a crimping punch or welding rod, and therefore the introduction of processing equipment is required. This increases the manufacturing cost. In addition, there are more restrictions on the layout of parts, requiring difficult solutions.

[0007] The present invention has been made to solve the above problems, and has an object to provide an electrically operated valve that can facilitate the assembly work of a rotation sensor and reduce equipment costs. [Means for solving the problem]

[0008] The motor-operated valve according to the present invention comprises: a housing having an opening at one end and a communication port on an outer periphery; a valve body that is inserted into the housing and rotates about a rotation axis to open and close the communication port; A drive device that rotationally drives the valve body; A detection target portion attached to one end of the rotating shaft; A rotation sensor that detects a rotation angle of the detection target portion; a cover attached to the other end of the housing; Equipped with The rotation sensor includes a sensor body and a lead wire. the cover includes an attachment portion that holds the sensor body facing the detection target portion, and an input / output wiring portion to which the lead wires are connected, The wiring portion has a clamping portion that clamps the lead wire.

[0009] The motor-operated valve according to the present invention includes a wiring section to which the lead wire of the rotation sensor is connected, and the wiring section has a clamping section that clamps the lead wire. Therefore, the motor-operated valve according to the present invention can fix the lead wire to the wiring section simply by inserting the lead wire into the clamping section. This makes it easier to assemble the rotation sensor to the motor-operated valve, and reduces equipment costs.

[0010] It is preferable that the clamping portion of the motor-operated valve according to the present invention is formed so as to be able to receive and clamp the lead wire from the same direction as the direction in which the rotation sensor is inserted into the mounting portion.

[0011] The clamping portion of the motor-operated valve according to the present invention can receive and clamp the lead wire from the same direction as the direction in which the rotation sensor is inserted into the mounting portion, which makes it easier to assemble the rotation sensor.

[0012] In the motor-operated valve according to the present invention, the clamping portion is preferably a notch formed in the wiring portion.

[0013] The clamping portion of the motor-operated valve according to the present invention is a notch formed in the wiring portion. Therefore, the lead wire of the rotation sensor can be inserted into the notch and assembled to the clamping portion. This makes it easier to assemble the rotation sensor to the motor-operated valve.

[0014] It is preferable that the mounting portion of the motor-operated valve according to the present invention has an inner wall that holds the outer surface of the rotation sensor, and that the mounting portion is capable of holding the rotation sensor by clamping it between the inner walls.

[0015] The mounting portion of the motor-operated valve according to the present invention is capable of holding the rotation sensor by clamping it between the inner walls. Therefore, the rotation sensor can be mounted by pushing it between the inner walls. This makes it possible to easily perform the assembly work.

[0016] The electric valve of the present invention preferably has a wall portion surrounding an attachment portion and an end face of the wall portion, and the wall portion preferably has an outflow portion formed smaller than the vertical distance from the surface of the attachment portion to the end face.

[0017] The motor-operated valve according to the present invention has a wall and an end face of the wall, and the wall has an outflow portion formed smaller than the vertical distance of the end face from the surface of the mounting portion. Therefore, even if the mounting portion is filled with resin material, when the amount of resin material filled in the mounting portion reaches a predetermined amount or more, the resin material is allowed to flow out from the outflow portion, and the resin material can be automatically adjusted to a constant height. Therefore, it is possible to prevent the resin material that is filled in the mounting portion more than necessary and raised up from interfering with other components, and to facilitate the assembly work of the rotation sensor.

[0018] The motor-operated valve according to the present invention preferably includes a sealing portion that covers at least the lead wire, and a plurality of outflow portions are provided and arranged at least at positions sandwiching the sealing portion.

[0019] The motor-operated valve according to the present invention includes a sealing portion, and a plurality of outlet portions are provided, at least arranged at positions sandwiching the sealing portion. Therefore, the resin material having a viscosity that is filled into the mounting portion is automatically adjusted to a uniform height quickly. This makes it possible to easily assemble the rotation sensor. [Brief description of the drawings]

[0020] [Figure 1] 1 is an overall schematic diagram of a cooling system including a motor-operated valve according to an embodiment of the present invention; [Diagram 2] FIG. 2 is a vertical sectional view showing the motor-operated valve of FIG. [Diagram 3] 2 is another vertical cross-sectional view of the motor-operated valve of FIG. 1. [Figure 4] 4 is a perspective view showing a portion C of FIG. 3 from the inner surface side. [Diagram 5] FIG. 5 is a cross-sectional view of FIG. 4 . [Figure 6A] 6 is a side view showing one end of the wiring portion of FIG. 5 as viewed in the direction of arrow D. FIG. [Figure 6B] FIG. 11 is a side view showing another embodiment of the wiring portion. [Figure 7] 4 is a schematic diagram showing a method of mounting the rotation sensor to a mounting portion. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] <Embodiment Mode> A motor-operated valve 100 according to an embodiment of the present invention will be described with reference to Fig. 1. Fig. 1 is an overall schematic diagram of a cooling system including a motor-operated valve 100 according to an embodiment of the present invention.

[0022] With reference to FIG. 1, an automotive cooling system to which a motor-operated valve 100 is applied will be described. The motor-operated valve 100 according to the embodiment of the present invention can be used as a flow rate control valve in the cooling system. The motor-operated valve 100 used in the automotive cooling system is attached to, for example, a cylinder head CH on the upper part of an internal combustion engine ENG provided in a vehicle. A fluid of the cooling system, i.e., coolant, pressurized by a water pump WP provided in the internal combustion engine ENG is introduced into the motor-operated valve 100. The motor-operated valve 100 adjusts and distributes the supply amount of the coolant to a radiator RAD, a heater HT, a transmission TM such as an AT or CVT, and a coolant utilization device such as an exhaust gas recirculation device EGR. The coolant utilization device is not limited to the heater HT, the transmission TM, and the exhaust gas recirculation device EGR, and may be any device required by the vehicle.

[0023] The cooling water from the motor-operated valve 100 to the radiator RAD is sent from the motor-operated valve 100 through a pipe L1 on the feed side. The cooling water dissipates heat while passing through the radiator RAD, which is equipped with a blower fan FAN, and its temperature decreases. The cooling water that has passed through the radiator RAD is returned to the internal combustion engine ENG through a pipe L1 on the return side. Between the motor-operated valve 100 and the heater HT, the transmission TM, and the exhaust gas recirculation device EGR, the cooling water is sent through pipes L2, L3, and L4 on the feed side, respectively. The cooling water that has passed through the heater HT, the transmission TM, and the exhaust gas recirculation device EGR is returned to the water pump WP through pipes L2, L3, and L4 on the return side. The cooling water that has returned to the water pump WP is pressurized and sent out again, passes through the cylinder head CH, and is then distributed to the radiator RAD and each cooling water utilization device via the motor-operated valve 100.

[0024] The configuration of the motor-operated valve 100 will be described with reference to Figures 2 and 3. Figure 2 is a vertical cross-sectional view of the motor-operated valve 100, taken along a plane passing through the valve body 80. Figure 3 is a vertical cross-sectional view different from that of Figure 2. Figure 2 shows the paths of inflow and outflow of cooling water to and from the motor-operated valve 100. Figure 3 shows a cover 110.

[0025] Fig. 2 shows a state in which the valve element 80 is closed. The motor-operated valve 100 includes a housing 10, a motor 65, a reduction gear 66, and a valve element 80. The housing 10 includes a valve accommodating section 20, which is a substantially cylindrical internal space, a motor accommodating section 26, a reduction gear accommodating section 27, and a cover 110. The motor-operated valve 100 has a flow path B for flowing cooling water to the radiator RAD, and the valve element 80 is disposed in the flow path B. In Fig. 2, the flow path B is indicated by a dashed arrow B. The opening and closing of the valve element 80 is controlled by a control device (not shown).

[0026] The flow path B is a flow path through which the cooling water flows to the radiator RAD. The valve body 80 is controlled not only by the cooling water temperature Tx but also by the vehicle running state and the like as necessary.

[0027] The housing 10 includes a first outlet 11 through which the cooling water is delivered to the radiator RAD, a second outlet 12 through which the cooling water is delivered to each cooling water utilization device, and an inlet 18 through which the cooling water is introduced from the internal combustion engine ENG. The motor-operated valve 100 is fixed by abutting the lower surface of the valve housing 20 against the upper part of the cylinder head CH. A first adaptor 23 and a second adaptor 24 are fitted and fixed in the first outlet 11 and the second outlet 12, respectively. A pipe L1 is connected to the first adaptor 23, and any one or more of the pipes L2 to L4 is connected to the second adaptor 24. In this embodiment, the first outlet 11 and the second outlet 12 correspond to the communication port of the present invention.

[0028] One end 31 of the first adapter 23 and one end 32 of the second adapter 24 each have a sealing device including a seal and a spring. One end 31 of the first adapter 23 has a seal 33 and a spring 76, and one end 32 of the second adapter 24 has a seal 37 and a spring 77. The seals 33 and 37 are integrally formed from an elastic material, such as a resin material or rubber.

[0029] One end 31, 32 is formed in a cylindrical shape with an opening. Springs 76, 77 formed with an outer diameter slightly smaller than the inner diameter of one end 31, 32 are inserted into the opening of one end 31, 32. An annular surface perpendicular to the central axis X1, X2 of one end 31, 32 is provided on the inner surface of the opening of one end 31, 32, respectively.

[0030] Between the one end 31, 32 and the valve body 80, the cylindrical members 34, 38 are disposed. The cylindrical members 34, 38 are in contact with the corresponding portions of the valve body 80. The cylindrical members 34, 38 are attached by abutting one end of the springs 76, 77. That is, the cylindrical members 34, 38 are pressed against the corresponding curved surfaces of the valve body 80 by the springs 76, 77. Therefore, even if the valve body 80 is actuated and rotated, the cylindrical members 34, 38 biased by the springs 76, 77 follow and maintain contact with the valve body 80. Therefore, the cooling water flowing out from the valve body 80 can flow through the first adaptor 23 and the second adaptor 24, respectively, without leaking due to the cylindrical members 34, 38 and the seals 33, 37.

[0031] The contact portion 17 provided at the lower part of the valve housing portion 20 will be described with reference to FIG. 2. In this description, the upper side of FIG. 2 is the top, and the lower side of FIG. 2 is the bottom. The cylinder head CH of the internal combustion engine ENG is provided with a cylinder head opening OP that opens upward. The contact portion 17 has a flat surface so that it can contact the mounting portion of the cylinder head CH of the housing 10. The contact portion 17 is provided with an inflow portion 18 that corresponds to the opening shape of the cylinder head opening OP. The motor-operated valve 100 is fixed to the cylinder head CH by bolts (not shown) while contacting the upper surface of the cylinder head CH with the inflow portion 18 aligned with the cylinder head opening OP. The inflow portion 18 is an opening formed in the contact portion 17. The contact portion 17 has a seal 19 provided in the contact portion 17 so as to surround the outside of the inflow portion 18.

[0032] The valve housing portion 20 of the motor-operated valve 100 communicates with the inlet portion 18. A valve body 80 is housed in the valve housing portion 20.

[0033] As shown in FIG. 2, the reduction gear 66 is accommodated in a reduction gear accommodating section 27 formed in the upper part of the motor-operated valve 100. The reduction gear accommodating section 27 is an enclosed space sealed by a cover 110. The cover 110 is a member having a rotation sensor attached to its inner surface, and is attached so as to cover the upper part of the motor-operated valve 100. The reduction gear 66 has a plurality of gears 67. One of the plurality of gears, the gear 67, has a fitting hole in its center. The rotation shaft 87 of the valve body 80 is fitted into the fitting hole of the gear 67. A detection target 105 for detecting the rotation sensor is provided on the end of the rotation shaft 87 on the gear 67 side, i.e., the end on the cover 110 side. The detection target 105 is, for example, a magnet. One of the plurality of gears of the reduction gear 66 is fixed to an output shaft (not shown) of the motor 65, and the rotation of the motor 65 is controlled by a control device, and the rotation torque is transmitted by the reduction gear 66. The rotational force transmitted to the final gear 67 rotates the valve body 80 in one direction or the other direction by a predetermined rotation angle. In this embodiment, the motor 65 and the reduction gear 66 form a drive device.

[0034] 2, a support portion 40 is fitted into the inlet portion 18. The support portion 40 is a member that supports the lower end portion of the rotating shaft 87. The support portion 40 has a plurality of rod-shaped portions 41 and a central portion 43 whose central axis is coaxial with the rotating shaft 87. The rod-shaped portions 41 are formed to radially protrude from the central portion 43 when viewed from above.

[0035] [Configuration of valve body 80] The configuration of the valve body 80 will be described with reference to Fig. 2. The valve body 80 is actuated by the driving force of the motor 65 transmitted via the reduction gear 66. The valve body 80 is accommodated in the valve accommodating section 20. The valve body 80 is formed in a generally cylindrical shape with a space therein, and has a shaft insertion section 81 with a central hole 82, and a rotating shaft 87 that fits into the shaft insertion section 81. A space that is a flow path for cooling water is formed inside the valve body 80.

[0036] The valve body 80 formed in a cylindrical shape has a first valve portion 83 and a second valve portion 84, each of whose outer circumferential surface protrudes into an arc surface in a side view. The first valve portion 83 and the second valve portion 84 are configured to be stacked in the direction of the central axis X3 of the valve body 80, i.e., in the vertical direction. The first valve portion 83 and the second valve portion 84 are formed so as not to be able to rotate relative to each other. The first valve portion 83 on the upper side of the valve body 80 is located on an extension line of the longitudinal direction of the first adaptor 23. The second valve portion 84 on the lower side of the valve body 80 is located on an extension line of the longitudinal direction of the second adaptor 24. The first valve portion 83 is provided with one valve opening portion 85 consisting of an elongated hole that opens in a predetermined angular range in the circumferential direction. The second valve portion 84 is provided with one valve opening portion 86 consisting of an elongated hole that opens in a predetermined angular range in the circumferential direction.

[0037] The temperature range of the coolant discharged to the radiator RAD connected to the motor-operated valve 100 and each coolant utilization device differs for each coolant utilization device. Therefore, the opening angles of the elongated holes of the valve opening 85 and the valve opening 86 and the opening positions on the outer circumferential surfaces of the first valve portion 83 and the second valve portion 84 are determined so that the valve opening / closing state is optimized for each coolant utilization device. The elongated holes of the valve openings 85 and 86 are each formed with an opening angle of 180 degrees or less when viewed from above, centered on the central axis X3.

[0038] The mounting structure of the cover 110 in the motor-operated valve 100 will be described with reference to Fig. 3. Fig. 3 is a vertical cross-sectional view of a cross section different from that of Fig. 2, and is a cross-sectional view taken along a plane passing through the rotating shaft 87 and the cover 110. Fig. 3 shows the cover 110, the valve body 80, and the motor 65 that the motor-operated valve 100 is equipped with.

[0039] The cover 110 is a member that is attached by covering the upper part of the motor-operated valve 100, and is located above the reduction gear housing part 27. An attachment part 111 to which the rotation sensor 101 is attached is provided on an inner surface 106 of the cover 110. The cover 110 has a plurality of wiring parts 130 (bus bars) for input and output that are insert-molded with both ends exposed. A connector part 127 that is connected to a control device (not shown) is integrally formed with the cover 110, and one end of each of the plurality of wiring parts 130 is disposed inside the connector part 127. The rotation sensor 101 is disposed with a small gap between it and an object, and detects the rotation angle of a rotating body that is the object.

[0040] The mounting portion 111 will be described with reference to FIG. 4. FIG. 4 is a perspective view showing the inner surface 106 of the portion indicated by the symbol C in FIG. 3 as viewed from the inside of the motor-operated valve 100, in other words, when turned upside down. The mounting portion 111 is disposed to surround a portion of the inner surface 106, and has walls 112, 113, 114, 115, 116, 117, 118, and 119 having an end surface 126. The walls 112, 113, 114, 115, 116, 117, 118, and 119 are disposed to surround the mounting portion 111. That is, the wall portions 112, 113, 114, 115, 116, 117, 118, and 119 define the region of the mounting portion 111. The walls 112 and 113 form a pair of parallel walls. The walls 115, 116 are spaced apart but arranged in a parallel relationship, e.g., aligned, such that the walls 114, 115, 116 form a set of parallel walls, i.e., the walls 112, 113, 114, 115, 116 define a generally rectangular area.

[0041] Walls 117 and 118 include a portion that is formed into a straight line portion with a certain length, and the straight line portion is disposed perpendicular to walls 115 and 116, respectively. The substantially rectangular area defined by walls 112, 113, 114, 115, and 116 and the area including an arc-shaped contour defined by walls 117, 118, and 119 are formed to be connected to each other.

[0042] The other end of the multiple wiring parts 130 connected to the rotation sensor 101 is disposed on the mounting part 111, and the lead wires 102 of the rotation sensor 101 are connected thereto. With the rotation sensor 101 and the lead wires 102 attached, a sealing part 129 is formed on the mounting part 111. The sealing part 129 is a part in which a fluid resin material, for example, an adhesive, is filled in the mounting part 111 and solidified. Alternatively, the sealing part 129 may be a potting material used as a filler. The fluid resin material is filled from the surface of the mounting part 111 to a predetermined vertical height. The sealing part 129 covers and seals the rotation sensor 101, the wiring parts 130, and the mounting part 111. The sealing part 129 covers at least the multiple lead wires 102, and therefore the positions of the lead wires 102 are fixed. This allows the multiple lead wires 102 to be held without being short-circuited.

[0043] As shown in Fig. 4, the wall portions 114, 115, and 116 have end faces 126 of the wall portions 114, 115, and 116, and outflow portions 121, 122, and 123, respectively. The outflow portions 121, 122, and 123 have outflow portions 121, 122, and 123 formed smaller than the vertical distance from the surface of the mounting portion 111 to the end faces 126 of the wall portions 114, 115, and 116. That is, the outflow portions 121, 122, and 123 are recessed portions provided on the end faces of the wall portions 114, 115, and 116, respectively. The outflow portions 121, 122, and 123 can automatically adjust the resin material to a constant height by causing the resin material to flow out of the outflow portions 121, 122, and 123 when the resin material filled in the mounting portion 111 becomes equal to or greater than a predetermined amount. The outflow portions 121, 122, 123 may be provided on any wall portion such as wall portions 117, 118, 119 other than wall portions 114, 115, 116 so that the vertical distance of the surface of the sealing portion 129 from the mounting portion 111, i.e., the position of the surface of the sealing portion 129, is at a predetermined height.

[0044] FIG. 5 shows the VV cross section of FIG. 4. The vertical distance L1 of the outflow portion 121 from the surface of the mounting portion 111 is smaller than the vertical distance L2 of the end face 126 of the wall portion 114 from the surface of the mounting portion 111. As a result, the excess fluid resin material filled to a height equal to or greater than the vertical distance L1 flows out of the outflow portions 121, 122, and 123. Therefore, the vertical distance of the surface of the sealing portion 129 from the mounting portion 111 is automatically adjusted to L1. Although the outflow portion 121 has been described above, the outflow portions 122 and 123 are also formed in the same height relationship as the outflow portion 121. The wall portion 114 and the wall portions 115 and 116 are arranged in parallel with the sealing portion 129 between them. That is, the outflow portion 121 and the outflow portions 122 and 123 are arranged at positions sandwiching the sealing portion 129.

[0045] The motor-operated valve 100 according to the present invention has wall portions 114, 115, 116, 117, 118, 119 and end faces 126 of the wall portions 114, 115, 116, 117, 118, 119, and the wall portions 114, 115, 116, 117, 118, 119 have outflow portions 121, 122, 123 formed smaller than the vertical distance of the end face 126 from the surface of the mounting portion 111. Therefore, when the resin material filled in the mounting portion 111 reaches a predetermined amount or more, the resin material is allowed to flow out from the outflow portions 121, 122, 123, so that the resin material can be automatically adjusted to a constant height. Therefore, the assembly work of the rotation sensor 101 can be facilitated, and the equipment cost can be reduced.

[0046] The motor-operated valve 100 according to the present invention includes a sealing portion 129, and a plurality of outflow portions 121, 122, 123 are provided and arranged at least at positions sandwiching the sealing portion 129. Therefore, the resin material having a viscosity filled in the mounting portion 111 is automatically adjusted to a uniform height quickly. This makes it possible to facilitate the assembly work of the rotation sensor 101 and reduce equipment costs. Note that it is not necessarily necessary to provide a plurality of outflow portions 121, 122, 123, and for example, one outflow portion may be used.

[0047] With reference to Figs. 4, 6A, and 6B, the clamping portion 131 provided at one end of the wiring portion 130 will be described. As shown in Fig. 4, the wiring portion 130 is formed from a conductive plate-like member. The clamping portion 131 disposed on the mounting portion 111 is formed, for example, in a shape in which one end of the wiring portion 130 is raised at a right angle. Fig. 6A is a side view showing the clamping portion 131 in the direction of arrow D in Fig. 4, that is, in a state in which the lead wire 102 is attached. At one end of the wiring portion 130, a notch 132 and the clamping portion 131 formed into a bifurcated shape by the notch 132 are formed.

[0048] The notch 132 is, for example, a groove cut at a constant width from one end of the wiring portion 130 along the longitudinal direction of the wiring portion 130. The groove width of the notch 132 is formed slightly shorter than the width of the lead wire 102 so that the lead wire 102 can be reliably contacted and connected to the notch 132, in other words, so that it can be press-fitted. The corners located on both sides of the tip of the notch 132 are cut diagonally, and the entrance of the notch 132 is formed wider than the width of the lead wire 102. Therefore, the lead wire 102 can be easily inserted into the notch 132. The lead wire 102 is inserted perpendicularly into the notch 132 and fixed. The lead wire 102 can be fixed simply by inserting it into the notch 132. After the lead wire 102 is assembled, soldering is added to the notch 132 as necessary. This allows the lead wire 102 to be reliably fixed by the clamping portion 131.

[0049] The motor-operated valve 100 according to the present invention includes a wiring section 130 to which the lead wire 102 of the rotation sensor 101 is connected, and the wiring section 130 has a clamping section 131 that clamps the lead wire 102. Therefore, the motor-operated valve 100 can be fixed simply by inserting the lead wire 102 into the clamping section 131. Therefore, the motor-operated valve 100 can be provided with an easy assembly work for the rotation sensor 101 and reduced equipment costs.

[0050] The clamping portion 131 of the motor-operated valve 100 according to the present invention is formed so that the lead wire 102 can be attached by moving it in a direction approaching the attachment portion 111. This makes it possible to easily assemble the rotation sensor 101.

[0051] The clamping portion 131 of the motor-operated valve 100 according to the present invention has a notch 132 formed in the wiring portion 130. Therefore, the rotation sensor 101 can be inserted and assembled to the clamping portion 131. This makes it possible to facilitate the assembly work.

[0052] In addition, instead of a groove cut into one end of wiring portion 130, notch portion 132 may be formed by providing a long hole in the middle of wiring portion 130 and bending wiring portion 130 so as to fold the long hole in half, so that the long hole portion is formed like a notch.

[0053] FIG. 6B shows a wiring part of a modification of the wiring part 130 shown in FIG. 6A. FIG. 6B is a side view taken along the arrow D in the same manner as FIG. 6A. The wiring part 135 is formed from the same conductive plate-like material as the wiring part 130, but one end of the wiring part 135 is bent in a different direction to form the clamping part 136. The clamping part 131 is formed by cutting out one end of the conductive plate-like material, but the clamping part 136 is formed by repeating a bending process multiple times to be clamped between one surface of the wiring part 135. The distance between the opposing surfaces that clamp the lead wire 102 is formed slightly smaller than the width dimension of the lead wire 102 so that the lead wire 102 is reliably contacted and connected to the clamping part 136.

[0054] With reference to FIG. 4, a holding structure for holding the rotation sensor 101 provided on the mounting portion 111 will be described. The mounting portion 111 has inner walls 141, 142, and 143 provided on the wall portions 117, 118, and 119, respectively. The rotation sensor 101 is mounted in a space surrounded by the inner walls 141, 142, and 143. The rotation sensor 101 is formed as a flat rectangular parallelepiped, and fitted portions 107 and 108 are provided on a pair of parallel outer surfaces of the rotation sensor 101. The rotation sensor 101 is mounted on the inner wall 143 with the corresponding outer surface of the rotation sensor 101 in contact with the inner wall 143. The dimension between the inner walls 141 and 142 is the same as or slightly smaller than the dimension between a pair of opposite sides sandwiched between the inner walls 141 and 142. Therefore, the rotation sensor 101 is press-fitted between the inner walls 141 and 142 and reliably fixed.

[0055] The mounting part 111 of the motor-operated valve 100 according to the present invention has inner walls 141, 142, and 143 that hold the outer surface of the rotation sensor 101, and the mounting part 111 can hold the rotation sensor 101 by clamping it between the inner walls 141, 142, and 143. Therefore, the rotation sensor 101 can be mounted by being pushed between the inner walls 141, 142, and 143. This makes it possible to facilitate the assembly work.

[0056] The inner walls 141, 142 are provided with fitting portions 145, 146 which are protrusions. Meanwhile, a pair of parallel outer surfaces of the rotation sensor 101 are provided with fitted portions 107, 108 which are recesses into which the fitting portions 145, 146 fit. When the rotation sensor 101 is attached inside the walls 117, 118, 119, the fitting portions 145, 146 fit into the fitted portions 107, 108.

[0057] That is, the inner walls 141, 142, and 143 support the outer surfaces of the corresponding rotation sensors 101, and the fitting portions 145 and 146 are fitted into and support the fitted portions 107 and .

[0058] The inner walls 141, 142, 143 may be provided on a part other than the side surfaces of the walls 117, 118, 119. For example, the walls 117, 118, 119 may not be provided, and a recess of a size in which the rotation sensor 101 fits may be provided in the flat mounting portion 111, and the inner side surface of the recess may be the inner walls 141, 142, 143 to which the rotation sensor 101 is fixed. Also, instead of forming the fitting portions 145, 146 as protruding portions and the fitted portions 107, 108 as recessed portions, the protruding portions and the recessed portions may be formed interchangeably. That is, the fitting portions 145, 146 may be formed as recessed portions, and the fitted portions 107, 108 may be formed as protruding portions.

[0059] [Positional relationship between the rotation sensor 101 and the rotation shaft 87] The positional relationship between the rotation sensor 101 and the member to be detected will be described with reference to Fig. 3. The cover 110 is attached to the upper part of the motor-operated valve 100 with the inner surface 106 facing downward, i.e., toward the inside of the motor-operated valve 100. The rotation sensor 101 detects the rotation angle of the rotary shaft 87. When the cover 110 is attached to the motor-operated valve 100, the rotation sensor 101 is disposed on the cover 110 and the motor-operated valve 100 so as to be adjacent to the detected part 105 of the rotary shaft 87 with a small gap therebetween. An accommodation space is formed between the rotation sensor 101 and the valve body 80. The upper end of the rotary shaft 87 protrudes into the accommodation space.

[0060] The rotation sensor 101 and the sealing portion 129 that covers the rotation sensor 101 are attached with a small gap between them and components such as the rotating shaft 87. The accuracy of the attachment position of the rotation sensor 101 and the vertical distance of the sealing portion 129 from the attachment portion 111 are important for the rotation sensor 101 to accurately detect the rotation angle of the rotating shaft 87. In addition, the accuracy of the attachment position of the rotation sensor 101 and the vertical distance of the sealing portion 129 from the attachment portion 111 are also important to prevent the cover 110 from interfering with other components inside the adjacent motor-operated valve 100.

[0061] [Rotation Sensor 101 Installation Procedure] The procedure for attaching the rotation sensor 101 will be described with reference to FIG. 7. The subject performing the assembly work may be a human, an assembly robot, an assembly device, or the like. In the following description, the subject performing the assembly work is referred to as the "work subject." The work subject holds the rotation sensor 101 and brings the rotation sensor 101 close to the attachment portion 111. The sensor body 103 is fitted into the space inside the inner walls 141, 142, and 143 while aligning the fitting portions 145 and 146 with the fitted portions 107 and 108. At the same time as fitting the sensor body 103, the work subject holds each lead wire 102 and inserts it into the notch portion 132 of the clamping portion 131 corresponding to each lead wire 102. By inserting the sensor body 103 and each lead wire 102 at the same time, the number of work steps can be reduced compared to the case where the lead wires 102 are inserted into the notch portion 132 after the sensor body 103 is fitted. Once the installation of the rotation sensor 101 is complete, a fluid resin material is filled into the installation portion 111 to cover the rotation sensor 101, and then solidified to form the sealing portion 129. Note that it is sufficient that the sealing portion 129 covers at least each of the lead wires 102. In the above manner, the rotation sensor 101 is installed in the installation portion 111. The completed cover 110 is attached to a predetermined portion of the motor-operated valve 100. Note that the insertion of each of the lead wires 102 into the notches 132 does not have to be done simultaneously with the fitting of the sensor body 103, but may be done afterwards.

[0062] The motor-operated valve (100) according to the present invention comprises: A housing (10) having an opening (inlet portion 18) at one end and communication ports (first outlet portion 11, second outlet portion 12, third outlet portion) on its outer periphery; a valve body (80) that is inserted into the housing (10) and rotates about a rotation shaft (87) to open and close the communication ports (the first outlet portion 11, the second outlet portion 12, and the third outlet portion); a drive device (a motor 65 and a reduction gear 66) that rotates and drives the valve body (80); A detection target portion (105) attached to one end of the rotating shaft (87); a rotation sensor (101) for detecting a rotation angle of the detection target portion (105); a cover (110) attached to the other end of the housing (10); Equipped with The rotation sensor (101) has a sensor body (103) and a lead wire (102), the cover (110) includes an attachment portion (111) that holds the sensor body (103) facing the detection target portion (105), and input / output wiring portions (130, 135) to which the lead wires (102) are connected; The wiring portion (130, 135) has clamping portions (131, 136) that clamp the lead wire (102).

[0063] The motor-operated valve 100 according to the present invention includes wiring sections 130, 135 to which the lead wire 102 of the rotation sensor 101 is connected, and the wiring sections 130, 135 have clamping sections 131, 136 that clamp the lead wire 102. Therefore, the motor-operated valve 100 according to the present invention can fix the lead wire 102 to the wiring sections 130, 135 simply by inserting the lead wire 102 into the clamping sections 131, 136. This makes it possible to easily assemble the rotation sensor 101 to the motor-operated valve 100, and reduces equipment costs.

[0064] The clamping portions 131 and 136 of the motor-operated valve 100 according to the present invention are preferably formed so as to be able to receive and clamp the lead wire 102 from the same direction as the direction in which the rotation sensor 101 is inserted into the attachment portion 111 .

[0065] According to the present invention, the lead wire 102 can be received and clamped in the same direction as the direction in which the rotation sensor 101 is inserted into the mounting portion 111. Therefore, the assembly work of the rotation sensor 101 can be facilitated.

[0066] It is preferable that the clamping portions 131 and 136 of the motor-operated valve 100 according to the present invention have a notch 132 formed in the wiring portion 130.

[0067] The clamping parts 131, 136 of the motor-operated valve 100 according to the present invention are notched parts 132 formed in the wiring part 130. Therefore, the lead wires 102 of the rotation sensor 101 can be inserted into the notched parts 132 to be assembled to the clamping parts 131, 136. This makes it possible to easily assemble the rotation sensor 101 to the motor-operated valve 100.

[0068] The mounting portion 111 of the motor-operated valve 100 according to the present invention has inner walls 141, 142, 143 which hold the outer surface of the rotation sensor 101, and it is preferable that the mounting portion 111 is capable of holding the rotation sensor 101 by clamping it between the inner walls 141, 142, 143.

[0069] The mounting portion 111 of the motor-operated valve 100 according to the present invention can hold the rotation sensor 101 by clamping it between the inner walls 141, 142, and 143. Therefore, the rotation sensor 101 can be mounted by being pushed between the inner walls 141, 142, and 143. This makes it possible to facilitate the assembly work.

[0070] The motor-operated valve 100 of the present invention has walls 114, 115, 116, 117, 118, 119 surrounding the mounting portion 111, and it is preferable that the walls 114, 115, 116, 117, 118, 119 have outflow portions 121, 122, 123 whose end faces are formed at a smaller vertical distance from the mounting portion 111 than other portions.

[0071] According to the present invention, when the amount of resin material filled in mounting portion 111 reaches or exceeds a predetermined amount, the resin material is made to flow out from outflow portions 121, 122, and 123, so that the resin material can be automatically adjusted to a constant height. Therefore, the assembly work of the sensor that is rotation sensor 101 can be facilitated, and the equipment cost can be reduced.

[0072] The motor-operated valve 100 according to the present invention is preferably provided with a sealing portion 129 that covers at least the lead wire 102, and a plurality of outflow portions 121, 122, 123 are provided and arranged at positions that sandwich at least the sealing portion 129. Since the lead wire 102 is covered with the sealing portion 129, the lead wire 102 can be insulated by the sealing portion 129, and a short circuit of the lead wire 102 can be prevented.

[0073] According to the present invention, the viscous resin material filled in the mounting portion 111 is automatically adjusted to a uniform height quickly. Therefore, the assembly work of the rotation sensor 101 can be facilitated and the equipment cost can be reduced.

[0074] <Other embodiments> In the above embodiment, the cover 110 including the mounting portion 111 to which the rotation sensor 101 having the sensor body 103 and the lead wire 102 according to the present invention is attached, the wiring portion 130 having at least a part disposed on the mounting portion 111 and connected to the lead wire 102, the wiring portion 130 including the clamping portion 131 for clamping the lead wire 102, and the motor-operated valve 100 including the cover 110 have been described. However, the motor-operated valve 100 of the present invention is not limited to this, and may be appropriately modified within the scope of the present invention. For example, the motor-operated valve 100 may be applied to vehicles other than those having only an internal combustion engine ENG as a drive source, and may be applied to vehicles or devices other than vehicles that are cooled by a fluid, such as an internal combustion engine ENG of a hybrid vehicle or a drive force generating motor of an electric vehicle.

[0075] Furthermore, the present invention may include a bypass passage with a thermostat installed inside the motor-operated valve 100. Furthermore, the materials of the components, the positions of the various pipes, and the arrangement of the devices in the cooling circuit described in the above embodiment may be changed as appropriate. [Explanation of symbols]

[0076] 10. Housing 11 First Outlet 12 Second Outlet 13 Third Outlet 18 Inlet 22 Interior Space 23 First Adapter 24 Second Adapter 25 Third Adapter 40 Support part 65 Motor 66 Reducer 80 Valve body 83 First valve section 84 Second valve section 85,86 Valve opening 87 Rotational Axis 100 Motor-operated valve 101 Rotation Sensor 102 Lead Wire 103 Sensor body 105 Detected part 110 Cover 111 Mounting part 114,115,116,117,118,119 Wall part 121,122,123 Outlet 126 End face 129 Sealing part 130,135 Wiring section (bus bar) 131,136 Clamping part 132 Notch 141,142,143 Interior wall T1 1st temperature T2 2nd temperature Tx Fluid temperature (cooling water temperature) EGR Exhaust Gas Recirculation System

Claims

1. a housing having an opening at one end and a communication port on an outer periphery; a valve body that is inserted into the housing and rotates about a rotation axis to open and close the communication port; A drive device that rotates the valve body; A detection target portion attached to one end of the rotating shaft; a rotation sensor for detecting a rotation angle of the detection target portion; a cover attached to the other end of the housing; Equipped with The rotation sensor includes a sensor body and a lead wire. the cover includes an attachment portion that holds the sensor body facing the detection target portion, and an input / output wiring portion to which the lead wires are connected, The wiring portion has a clamping portion that clamps the lead wire.

2. The motor-operated valve according to claim 1 , wherein the clamping portion is formed to be able to receive and clamp the lead wire from the same direction as a direction in which the rotation sensor is inserted into the mounting portion.

3. The motor-operated valve according to claim 2 , wherein the clamping portion is a notch formed in the wiring portion.

4. the mounting portion has an inner wall that holds an outer surface of the rotation sensor, The motor-operated valve according to claim 3 , wherein the mounting portion is capable of holding the rotation sensor by clamping it between the inner walls.

5. The mounting portion has a wall portion and an end surface of the wall portion, The motor-operated valve according to any one of claims 1 to 4, wherein the wall portion has an outflow portion that is formed smaller than the vertical distance from the surface of the mounting portion of the end face.

6. the cover includes a sealing portion that covers at least the lead wire; The motor-operated valve according to claim 5 , wherein a plurality of the outflow portions are provided, and are arranged at least at positions sandwiching the sealing portion.

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