Intelligent voltage sensor based on IOLINK

Abstract

The invention discloses an IOLINK-based intelligent voltage sensor, which comprises a shell and an annular iron core arranged in the shell, the annular iron core is provided with a primary side winding and a secondary side winding, and the IOLINK-based intelligent voltage sensor further comprises a connecting part which comprises a conductive part arranged at a primary side connecting end of the shell and a wiring part fixedly arranged on the conductive part, the conductive piece is connected in series with the primary side winding; the movable part comprises a movable piece arranged on the inner side of the wiring piece and a driving piece arranged in the shell, the driving piece is connected with the movable piece, the driving piece acts to drive the movable piece to move on the wiring piece, and the movement comprises the steps that the wiring harness connector on the wiring piece is pressed on the conductive piece, and the operation end for controlling the action of the driving piece is far away from the wiring piece. According to the invention, quick connection and disconnection can be realized, effective isolation can be realized during connection and disconnection of the primary side connected with high voltage, an operator does not need to directly approach the wiring terminal for operation, and the safety is improved.

Description

Technical Field

[0001] The present application relates to the field of voltage detection technology, and in particular to an IOLINK-based intelligent voltage sensor. Background Art

[0002] Voltage sensor, also known as PT (Potential Transformer), is an instrument used to transform voltage. The purpose of voltage transformation is to power measuring instruments and relay protection devices, and to measure the voltage, power and electric energy of the line.

[0003] The primary side of the voltage sensor is often connected to high voltage, and has the disadvantages of deep installation position, poor location, narrow environment, and dim field of view. The current method of disassembling the wiring harness on the primary side of the voltage sensor is relatively cumbersome, difficult to adapt to the environment in which it is located, and there are certain safety hazards. Moreover, when the voltage sensor is inspected or maintained, there is currently no isolation protection device when disassembling the wiring harness, and the wiring harness will be directly disconnected at the wiring position, further exacerbating the risk.

[0004] Therefore, in view of the above technical problems, how to reduce the difficulty of disconnecting the wire harness and avoid disconnecting the wire harness directly at the wiring position is a technical problem that technical personnel in this field need to solve. Summary of the invention

[0005] The purpose of this application is to provide an IOLINK-based intelligent voltage sensor that can achieve quick disconnection and effectively isolate the primary side connected to high voltage when disconnecting it. The operator does not need to operate directly near the wiring terminal, thereby improving safety.

[0006] To achieve the above object, the present application provides an IOLINK-based intelligent voltage sensor, comprising a housing and an annular core arranged inside the housing, wherein a primary winding and a secondary winding are arranged on the annular core, and further comprising:

[0007] A connecting portion, comprising a conductive member provided at a primary side connecting end of the housing and a connecting member fixedly provided on the conductive member, wherein the conductive member is connected in series with the primary side winding;

[0008] The movable part includes a movable part arranged on the inner side of the wiring member and a driving part arranged in the outer shell, the driving part is connected to the movable part, the driving part is actuated to drive the movable part to move on the wiring member, the movement includes pressing the wiring harness connector on the wiring member onto the conductive part, and the operating end controlling the movement of the driving part is away from the wiring member.

[0009] Preferably, the wiring member is arranged in a columnar shape, an external thread is arranged on the outer circumference of the wiring member, a screw head is matched at the external thread, and the wiring harness connector is sleeved at a position of the outer circumference of the wiring member other than the external thread.

[0010] Preferably, the movable part includes a push rod arranged along the axial direction of the wiring member and a pressure block extending radially out of the wiring member, the wiring member is provided with a slot hole along its axial direction, one end of the wiring member is arranged in the slot hole, and the other end extends out of the wiring member and extends toward the inside of the shell, the push rod is movably arranged along the axial direction of the wiring member, the pressure block is connected to the push rod, and the movement of the push rod can drive the pressure block to move to tighten or loosen the wiring harness connector and the conductive member.

[0011] Preferably, the driving member includes an auxiliary plate located in the outer shell and a connecting rod connected to the auxiliary plate, the operating end includes an adjusting member, the adjusting member is arranged on the outer shell at a position corresponding to the auxiliary plate, the adjusting member is connected to the auxiliary plate, and the connecting rod is connected to the push rod through a wedge structure to convert the movement of the auxiliary plate and the connecting rod into the movement of the push rod.

[0012] Preferably, a wedge block is provided on the connecting rod, a first through slot is provided on the push rod extending outward from the connecting piece, the wedge block passes through the first through slot, and the contact surface between the wedge block and the first through slot is an inclined wedge fit.

[0013] Preferably, a second through slot is radially provided at a position corresponding to the terminal and the pressing block, the pressing block is rotatably arranged in the second through slot, a third through slot corresponding to the position of the second through slot is provided on the push rod, one end of the pressing block extends into the third through slot, and the other end extends out of the second through slot;

[0014] The inner wall of the second through slot abuts against the pressing block, and when the push rod moves axially, the pressing block can be driven to rotate so that the end of the pressing block extending out of the second through slot faces toward or moves away from the wiring harness connector.

[0015] Preferably, the wedge block and the first through slot drive the push rod to move toward the inside of the connecting piece through an inclined wedge mechanism, and the inner wall of the third through slot is pressed against the pressing block to drive the pressing block to move.

[0016] Preferably, an adjusting head with adjustable axial position is provided at the end of the slot hole, and a return spring is provided between the adjusting head and the push rod, and the return spring is used to provide the push rod with an elastic force to overcome the movement toward the inside of the wiring member.

[0017] Preferably, there are two groups of connecting parts, which are symmetrically distributed on both sides of the auxiliary plate. The two ends of the auxiliary plate are respectively provided with connecting rods that are wedge-matched with the two groups of connecting parts to synchronously drive the tightening or loosening of the wiring harness connectors and the conductive parts at the two primary side connection ends.

[0018] Preferably, a PCB board electrically connected to the secondary winding is further provided in the housing, and an output terminal is electrically connected to the outside of the PCB board. The output terminal is a three-wire interface, and the output terminal can be connected to the Io-Link master station through a wiring harness adapted thereto.

[0019] Compared with the above background technology, the present application drives the movable part on the wiring part through the driving part in the shell to realize the compression or loosening of the wiring harness connector and the conductive part, and can quickly realize the plug-in; at the same time, the movable part is arranged on the inner side of the wiring part, which reduces the influence of the movable part on the space at the wiring part, facilitates the application of the equipment in the narrow environment and inconvenient operation, and improves the application scope of the equipment. The operating end that controls the action of the driving part is far away from the wiring part, so the primary side connected to the high voltage can be isolated when disconnected, and the operator does not need to operate directly near the wiring terminal, which improves safety and can achieve the effect of quick disconnection and isolation protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0021] Figure 1 A schematic diagram of the three-dimensional structure of an IOLINK-based intelligent voltage sensor provided in an embodiment of the present application;

[0022] Figure 2 A schematic diagram of the three-dimensional structure of the IOLINK-based intelligent voltage sensor provided in an embodiment of the present application from another angle;

[0023] Figure 3 A partial cross-sectional view of an IOLINK-based intelligent voltage sensor provided in an embodiment of the present application;

[0024] Figure 4 for Figure 3 A partial cross-sectional view of

[0025] Figure 5 for Figure 4 A schematic diagram of the structure at A;

[0026] Figure 6 for Figure 2 A partial cross-sectional view of

[0027] Figure 7 for Figure 6 An enlarged schematic diagram of the structure at location B.

[0028] In the figure: 1-conductive part; 2-screwing head; 3-housing; 4-adjusting part; 5-connecting part; 6-auxiliary plate; 7-connecting rod; 8-wedge block; 9-push rod; 10-pressing block; 11-adjusting head; 12-second through slot; 13-third through slot; 14-reset spring; 15-first through slot; 16-PCB board; 17-output terminal. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0030] It should be noted that in this embodiment, the directions or positional relationships indicated by "upper", "lower", "front", "back", etc. are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present application. In addition, "first", "second", "third", and "fourth" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0031] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0032] In this embodiment, an IOLINK-based intelligent voltage sensor is provided, including a housing 3 and an annular core arranged inside the housing 3, the annular core is provided with a primary winding and a secondary winding, which is similar to the principle of a transformer and changes the AC voltage according to the law of electromagnetic induction, which will not be repeated here.

[0033] Please refer to Figure 3 The voltage sensor of the present application also includes a connecting part and a movable part. The connecting part includes a conductive member 1 disposed at the primary side connection end of the housing 3 and a wiring member 5 fixedly disposed on the conductive member 1. The conductive member 1 may be a conductive sheet. The conductive member 1 is connected in series with the primary side winding, so that the current on the high voltage side flows into the primary side winding. The movable part includes a movable member disposed inside the wiring member 5 and a driving member disposed inside the housing 3. The driving member is connected to the movable member, so that the movable member is driven to move on the wiring member 5 through the action of the driving member. During the movement of the movable member, the wiring harness connector on the wiring member 5 can be pressed against the conductive member 1 to realize the electrical connection between the wiring harness connector and the conductive member 1. The wiring harness connector is the wiring harness connector on the high voltage side.

[0034] Among them, since the driving member has a driving action, the driving member needs to have an operating end to realize the driving action of the driving member. In some embodiments, the operating end can be set on the housing 3 away from the wiring member 5 to play a role of isolation and protection.

[0035] In summary of the above embodiments, the present application uses the driving member in the housing 3 to drive the movable member on the wiring member 5 to achieve the compression or loosening of the wiring harness connector and the conductive member 1, and can quickly achieve plug-in; at the same time, the movable member is arranged on the inner side of the wiring member 5, reducing the impact of the movable member on the space at the wiring member 5, making it easier for the device to be used in a narrow environment and inconvenient to operate, thereby improving the scope of application of the device. The operating end that controls the action of the driving member is far away from the wiring member 5, so that the primary side connected to the high voltage can be isolated when disconnected, and the operator does not need to operate directly near the wiring terminal, which improves safety and can achieve the effect of rapid disconnection and isolation protection.

[0036] Please refer to Figures 1 to 3 The wiring member 5 can be a columnar structure, and the wiring harness connector is a connector structure with an annular collar. For details, reference can be made to the prior art. When the primary side connection end of the voltage sensor is connected to the high-voltage side, the wiring harness connector on the high-voltage side can be sleeved on the annular collar. For the traditional wiring method, an external thread can be provided on the outer periphery of the wiring member 5, and a screwing head 2 is installed at the external thread. Through the tightening action of the screwing head 2, the wiring harness connector is pressed against the conductive member 1, thereby realizing the electrical connection between the wiring harness connector and the conductive member 1.

[0037] The present application takes into account the traditional wiring method, and can choose the quick-release connection, that is, use the connecting part and the movable part to achieve the quick compression or loosening of the wire harness connector and the conductive part 1, or choose the traditional wiring method, that is, use the screw head 2 to achieve the compression or loosening of the wire harness connector and the conductive part 1. Of course, the assembly effect of the screw head 2 does not affect the normal action of the movable part, and after the movable part is quickly compressed, the stability of the movable part can be further improved by the screw head 2, that is, after the movable part is quickly compressed, the compression effect of the screw head 2 can also act on the movable part to prevent the movable part from accidentally loosening, thereby improving the compression effect of the wire harness connector and the conductive part 1.

[0038] Please refer to Figure 3The above-mentioned movable parts include a push rod 9 arranged along the axial direction of the wiring member 5 and a pressure block 10 extending out of the wiring member 5 in the radial direction. The wiring member 5 is provided with a slot hole along its axial direction. One end of the wiring member 5 is arranged in the slot hole, and the other end extends out of the wiring member 5 and extends toward the inside of the housing 3. The push rod 9 is arranged axially in the slot hole. The pressure block 10 is connected to the push rod 9. Specifically, the inner side of the pressure block 10 is connected to the push rod 9. The inner side here is the side close to the axis of the wiring member 5, and the opposite is the outer side. When the push rod 9 is actuated, the pressure block 10 can be driven to move, thereby driving the pressure block 10 to move toward or away from the wiring harness connector, thereby compressing or loosening the wiring harness connector and the conductive member 1. It can be seen that the wiring harness connector of the present application needs to be sleeved between the pressure block 10 and the conductive member 1, so as to ensure that the pressure block 10 can act on the wiring harness connector after the action, and the wiring harness connector can move toward the conductive member 1, thereby realizing the compression of the wiring harness connector and the conductive member 1.

[0039] In some embodiments, the push rod 9 may be disposed at the axial centerline of the terminal 5 . The push rod 9 may be a columnar structure, and the push rod 9 and the terminal 5 are coaxially disposed.

[0040] Please refer to Figure 4 and Figure 5 , the driving member includes an auxiliary plate 6 located in the housing 3 and a connecting rod 7 connected to the auxiliary plate 6, and the operating end includes an adjusting member 4, which is arranged on the housing 3 at a position corresponding to the auxiliary plate 6 and exposed relative to the housing 3; the adjusting plate can be a bolt, which is threadedly connected to the housing 3 to form a ball screw structure, and the position of the housing 3 is relatively fixed, so rotating the adjusting member 4 will change the axial position of the adjusting member 4, and the adjusting member 4 is connected to the auxiliary plate 6, which will change the position of the auxiliary plate 6. In some embodiments, the adjusting member 4 can also be threadedly connected to the auxiliary plate 6 to form a ball screw structure, the housing 3 only plays an axial limiting role, and the auxiliary plate 6 can be limited in the circumferential direction of the housing 3, so that the auxiliary plate 6 only moves in the axial direction of the adjusting member 4.

[0041] Please refer to Figure 5 After the position of the auxiliary plate 6 changes, that is, after the auxiliary plate 6 moves up and down, it can drive the connecting rod 7 to move synchronously, and the connecting rod 7 is connected with the push rod 9 through the inclined wedge structure. Therefore, the movement of the auxiliary plate 6 and the connecting rod 7 will be converted into the movement of the push rod 9, and the movement of the push rod 9 will be further converted into the movement of the pressure block 10, thereby realizing the tightening or loosening of the wiring harness connector and the conductive member 1 by the pressure block 10.

[0042] Furthermore, in order to achieve the oblique wedge fit between the connecting rod 7 and the push rod 9, a wedge block 8 is provided on the connecting rod 7, and a first through groove 15 is provided on the push rod 9 extending outward from the terminal 5. The wedge block 8 passes through the first through groove 15, and the contact surface between the wedge block 8 and the first through groove 15 is an oblique wedge fit.

[0043] In addition, a second through slot 12 is radially provided at the corresponding position of the wiring member 5 and the pressing block 10, the pressing block 10 is rotatably arranged in the second through slot 12, and the rotation axis of the pressing block 10 is arranged on the wiring member 5, and a third through slot 13 corresponding to the position of the second through slot 12 is provided on the push rod 9, one end of the pressing block 10 extends into the third through slot 13, and the other end extends out of the second through slot 12. The inner wall of the second through slot 12 abuts against the pressing block 10, and when the push rod 9 moves axially, the pressing block 10 can be driven to rotate, so that the end of the pressing block 10 extending out of the second through slot 12 faces or moves away from the wiring harness connector.

[0044] When it is necessary to connect in a traditional way, the harness connector can be inserted into the outer periphery of the terminal 5 to be close to or in contact with the conductive sheet, and then the screw head 2 is screwed in and pressed to achieve electrical connection between the harness connector and the conductive member 1; when it is connected in a quick-release way, after the harness connector ring is inserted into the terminal head, the auxiliary plate 6 and the connecting rod 7 are driven to move by the adjusting member 4, and the wedge block 8 cooperates with the push rod 9 to move the push rod 9. The movement of the push rod 9 will push the pressing block 10 to rotate through the inner wall of the third through slot 13, so that the outer side of the pressing block 10 extends out of the second through slot 12 to press and fix the harness connector and the conductive member 1. When quick release is required, the adjusting member 4 is adjusted in the reverse direction to move the auxiliary plate 6 and the connecting rod 7 upward, and the push rod 9 and the wedge block 8 are separated from the restriction of the wedge, so that the inner wall of the third through slot 13 and the pressing block 10 are separated from the extrusion, and the pressing block 10 is naturally loosened, and the harness connector can be removed from the terminal 5.

[0045] In addition, in order to realize the automatic resetting of the pressing block 10 and facilitate the removal of the wiring harness connector, an adjusting head 11 with an adjustable axial position can also be provided at the end of the slot hole, please refer to Figure 3 and Figure 5 A return spring 14 is provided between the adjusting head 11 and the push rod 9, and the return spring 14 is used to provide the push rod 9 with an elastic force to overcome the movement toward the inside of the wiring member 5. When the push rod 9 and the wedge block 8 are separated from the wedge-shaped restriction, under the action of the return spring 14, the push rod 9 can automatically move toward the wedge block 8, so that the inner wall of the third through groove 13 and the pressing block 10 are separated from the extrusion, and the pressing block 10 is automatically reset, and the end of the pressing block 10 can be retracted into the second through groove 12 under the action of rotation, so as to facilitate the removal of the wiring harness connector. At the same time, the elastic force of the return spring 14 can be changed by changing the position of the adjusting head 11, thereby improving the flexibility of the device.

[0046] Please refer to Figures 1 to 3The number of connection parts in the present application is two groups, and they are symmetrically distributed on both sides of the auxiliary plate 6, that is, the two groups of connection parts are arranged at the two primary side connection ends of the housing 3, and the two ends of the auxiliary plate 6 are respectively provided with connecting rods 7 that cooperate with the oblique wedges of the two groups of connection parts to synchronously drive the tightening or loosening of the harness connectors and the conductive member 1 at the two primary side connection ends. When quick disconnection is required, the bolt is screwed, and the bolt will drive the auxiliary plate 6 under the action of the thread to move the connecting rod 7 and the wedge block 8 downward. When the wedge block 8 moves downward, it pushes the push rod 9 to move under the action of the oblique wedge surface, thereby driving the pressure block 10 to work. The work of the connecting member will simultaneously drive the two primary side connection ends to complete disconnection, so that the disassembly and assembly is faster and more convenient than the traditional connection method. In addition, the present application connects the wires by controlling the adjusting member 4, and it is safer to be in a relatively isolated and protected position during operation.

[0047] Please refer to Figure 6 and Figure 7 In the housing 3 of the present application, a PCB (printed circuit board) board electrically connected to the secondary winding is also provided. The outer side of the PCB board 16 is also electrically connected to an output terminal 17. The output terminal 17 is a unified three-wire interface. This interface can be connected to the Io-Link master station through a matching wiring harness. When the work inside the device is completed, data is exchanged with the master station device through the PCB board 16 and the output terminal 17.

[0048] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0049] Specific examples are used herein to illustrate the principles and implementation methods of the present application, and the description of the above embodiments is only used to help understand the method and core ideas of the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. An IOLINK-based intelligent voltage sensor, comprising a housing (3) and an annular iron core arranged inside the housing (3), wherein a primary winding and a secondary winding are arranged on the annular iron core, characterized in that: Also includes: A connecting portion, comprising a conductive member (1) provided at a primary side connection end of the housing (3) and a connecting member (5) fixedly provided on the conductive member (1), wherein the conductive member (1) is connected in series with the primary side winding; The movable part comprises a movable part arranged inside the connecting member (5) and a driving part arranged inside the housing (3), the driving part being connected to the movable part, the driving part being actuated to drive the movable part to move on the connecting member (5), the movement comprising pressing the wiring harness connector on the connecting member (5) onto the conductive member (1), and the operating end for controlling the movement of the driving part being away from the connecting member (5).

2. The IOLINK-based intelligent voltage sensor according to claim 1, characterized in that: The wiring member (5) is arranged in a columnar shape, an outer circumference of the wiring member (5) is provided with an external thread, a screwing head (2) is matched at the external thread, and the wiring harness connector is sleeved at a position of the outer circumference of the wiring member (5) that is not provided with the external thread.

3. The IOLINK-based intelligent voltage sensor according to claim 2, characterized in that: The movable part comprises a push rod (9) arranged along the axial direction of the wiring member (5) and a pressure block (10) extending radially out of the wiring member (5); the wiring member (5) is provided with a slot hole along its axial direction; one end of the wiring member (5) is arranged in the slot hole, and the other end extends out of the wiring member (5) and toward the inside of the housing (3); the push rod (9) is movably arranged along the axial direction of the wiring member (5); the pressure block (10) is connected to the push rod (9); the movement of the push rod (9) can drive the pressure block (10) to move, so as to tighten or loosen the wiring harness connector and the conductive member (1).

4. The IOLINK-based intelligent voltage sensor according to claim 3, characterized in that: The driving member comprises an auxiliary plate (6) located in the housing (3) and a connecting rod (7) connected to the auxiliary plate (6); the operating end comprises an adjusting member (4) disposed on the housing (3) at a position corresponding to the auxiliary plate (6); the adjusting member (4) is connected to the auxiliary plate (6); the connecting rod (7) is connected to the push rod (9) by means of an inclined wedge structure, so that the movement of the auxiliary plate (6) and the connecting rod (7) is converted into the movement of the push rod (9).

5. The IOLINK-based intelligent voltage sensor according to claim 4, characterized in that: The connecting rod (7) is provided with a wedge block (8), and the push rod (9) extending outside the connecting piece (5) is provided with a first through slot (15). The wedge block (8) passes through the first through slot (15), and the contact surface between the wedge block (8) and the first through slot (15) is an inclined wedge fit.

6. The IOLINK-based intelligent voltage sensor according to claim 5, characterized in that: A second through slot (12) is radially provided at a position corresponding to the terminal piece (5) and the pressing block (10); the pressing block (10) is rotatably arranged in the second through slot (12); a third through slot (13) corresponding to the position of the second through slot (12) is provided on the push rod (9); one end of the pressing block (10) extends into the third through slot (13) and the other end extends out of the second through slot (12); The inner wall of the second through slot (12) abuts against the pressure block (10), and when the push rod (9) moves axially, the pressure block (10) can be driven to rotate, so that the end of the pressure block (10) extending out of the second through slot (12) faces toward or moves away from the wiring harness connector.

7. The IOLINK-based intelligent voltage sensor according to claim 6, characterized in that: The wedge block (8) and the first through slot (15) drive the push rod (9) to move toward the inside of the connecting piece (5) through an inclined wedge mechanism, and the inner wall of the third through slot (13) is pressed against the pressing block (10) to drive the pressing block (10) to move.

8. The IOLINK-based intelligent voltage sensor according to claim 7, characterized in that: An adjusting head (11) with adjustable axial position is provided at the end of the slotted hole, and a return spring (14) is provided between the adjusting head (11) and the push rod (9), wherein the return spring (14) is used to provide the push rod (9) with an elastic force to overcome the movement toward the inside of the terminal block (5).

9. The IOLINK-based intelligent voltage sensor according to any one of claims 4 to 8, characterized in that: The number of the connecting parts is two groups, and they are symmetrically distributed on both sides of the auxiliary plate (6). The two ends of the auxiliary plate (6) are respectively provided with connecting rods (7) that are wedge-matched with the two groups of connecting parts to synchronously drive the wiring harness connectors at the two primary side connection ends and the conductive member (1) to be compressed or loosened.

10. The IOLINK-based intelligent voltage sensor according to any one of claims 1 to 8, characterized in that: A PCB board (16) electrically connected to the secondary winding is also provided in the housing (3); an output terminal (17) is also electrically connected to the outside of the PCB board (16); the output terminal (17) is a three-wire interface; the output terminal (17) can be connected to an Io-Link master station via a wiring harness adapted thereto.

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