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KR-20260066894-A - Automatic assembly system for EV relay shaft assembly

KR20260066894AKR 20260066894 AKR20260066894 AKR 20260066894AKR-20260066894-A

Abstract

The present invention relates to an automatic assembly system for a shaft assembly of an EV relay, and in particular, comprises: a turntable having a plurality of fixed jigs spaced apart on its upper surface and rotating on a horizontal plane by the rotational force of a drive motor; a shaft assembly unit having a plurality of fixed jigs rotating along the turntable and having a shaft sequentially seated thereon; a spring assembly unit having a spring seated on the upper end of the shaft seated on the fixed jigs; a movable contact assembly unit having a movable contact seated on the upper end of the spring seated on the upper end of the shaft of the fixed jigs; a washer assembly unit having a washer seated on the upper surface of the movable contact seated on the upper end of the spring of the fixed jigs; and a riveting unit having a washer struck on the upper end of the shaft penetrating the washer to press the washer against the upper surface of the movable contact, thereby completing the shaft assembly, and thus has the effect of automating the assembly of the shaft assembly.

Inventors

  • 최복록
  • 홍완기
  • 오익수

Assignees

  • 국립강릉원주대학교산학협력단

Dates

Publication Date
20260512
Application Date
20241105

Claims (10)

  1. A turntable (10) having a plurality of fixed jigs (12) spaced apart on its upper surface and rotating on a horizontal plane by the rotational force of a drive motor (11); A shaft assembly unit (20) that sequentially places a shaft (1) on a plurality of fixed jigs (12) provided next to the turntable (10) and rotating along the turntable (10); A spring assembly unit (30) for mounting a spring (2) on the upper part of a shaft (1) mounted on the above-mentioned fixed jig (12); A movable contact assembly unit (40) that mounts a movable contact (3) on the upper end of a spring (2) mounted on the upper end of the shaft (1) of the fixed jig (12); A washer assembly unit (50) for mounting a washer (4) on the upper surface of a movable contact (3) mounted on the upper end of a spring (2) of the fixed jig (12); An automatic shaft assembly system for an EV relay, characterized by comprising: a riveting unit (60) that completes the shaft assembly (5) by striking the upper end of the shaft (1) penetrating the washer (4) to press the washer (4) against the upper surface of the movable contact (3).
  2. In claim 1, The shaft assembly unit (20) comprises a support (21) standing upright next to the turntable (10); A guide plate (22) installed on the above support (21); A horizontal slider (23) that moves horizontally on the guide plate (22); A vertical slider (24) that moves in a vertical direction on the horizontal slider (23) above; An automatic shaft assembly system for an EV relay, characterized by comprising: a shaft gripper (25) installed on the vertical slider (24) to grip the shaft (1) supplied from the feeder (28) and then seated on the fixed jig (12).
  3. In claim 1, The above spring assembly unit (30) comprises a support (31) standing upright next to the turntable (10); A guide plate (32) installed on the above support (31); A horizontal slider (33) that moves horizontally on the guide plate (32); A vertical slider (34) that moves vertically on the horizontal slider (33); An automatic shaft assembly system for an EV relay, characterized by comprising: a spring gripper (35) installed on the vertical slider (34) to grip a spring (2) supplied from a feeder (38) and then seated on the upper part of a shaft (1) seated on the fixed jig (12).
  4. In claim 1, The above-mentioned movable contact assembly unit (40) comprises a support (41) standing upright next to the turntable (10); A guide plate (42) installed on the above support (41); A horizontal slider (43) that moves horizontally on the guide plate (42); A vertical slider (44) that moves vertically on the horizontal slider (43); An automatic shaft assembly system for an EV relay, characterized by comprising: a movable contact gripper (45) installed on the vertical slider (44) to grip a movable contact (3) supplied from a feeder (48) and then set on the upper end of a spring (2) that is seated on the upper end of the shaft (1) of the fixed jig (12).
  5. In claim 1, The washer assembly unit (50) above includes a support (51) standing upright next to the turntable (10); A guide plate (52) installed on the above support (51); A horizontal slider (53) that moves horizontally on the guide plate (52); A vertical slider (54) that moves vertically on the horizontal slider (53); An automatic shaft assembly system for an EV relay, characterized by comprising: a washer gripper (55) installed on the vertical slider (54) to grip a washer (4) supplied from a feeder (58) and then placed on the upper surface of a movable contact (3) seated on the upper end of a spring (2) of the fixed jig (12).
  6. In claim 1, An automatic shaft assembly system for an EV relay, characterized by further comprising a vision unit (70) that visualizes the shaft assembly (5) completed by the riveting unit (60) and determines whether it is defective.
  7. In claim 6, An automatic assembly system for an EV relay shaft assembly, characterized by further comprising a separation and discharge module (80) that separates and discharges good parts and defective parts from a shaft assembly (5) in which the defect status is determined through the vision unit (70).
  8. In claim 7, The above separation discharge module (80) comprises a discharge panel (81) that receives a shaft assembly (5) whose defect status is determined by the vision unit (70); A discharge cylinder (82) connected to the discharge panel (81) and changing the vertical position of the discharge panel (81) when the shaft assembly (5) is a good product or a defective product; A good product discharge plate (83) that receives and discharges the good product shaft assembly (5) from the discharge panel (81) when the above shaft assembly (5) is a good product; An automatic shaft assembly system for an EV relay, characterized by comprising: a defective product discharge plate (84) that receives and discharges the defective shaft assembly (5) from the discharge panel (81) when the shaft assembly (5) is defective.
  9. In claim 8, An automatic assembly system for a shaft assembly of an EV relay, characterized in that the discharge panel (81), the good product discharge plate (83), and the defective product discharge plate (84) are formed with their bottoms sloping downward in the same direction so that the shaft assembly (5) slides down due to its own weight.
  10. In claim 1, An automatic shaft assembly system for an EV relay, characterized by further comprising a roller bracket (90) having a roller (91) installed thereon that rotates while contacting and supporting the bottom surface of the turntable (10).

Description

Automatic assembly system for EV relay shaft assembly The present invention relates to a shaft assembly of an EV relay, and more particularly to an automatic assembly system for an EV relay shaft assembly capable of automating the assembly of the shaft assembly. This project (result) is the result of the Phase 3 Leading University Industry-Academic Cooperation Project (LINC 3.0), funded by the Ministry of Education and the National Research Foundation of Korea. EV (Electric Vehicle) relays are essential components for electric vehicles. They are installed between the battery and the inverter to turn the battery power ON/OFF in response to commands from the Battery Management System (BMS), and are installed between the battery and the external charger to turn charging ON/OFF. Broadly speaking, they can be used in any location where a DC load is applied. Among the components of eco-friendly vehicles such as electric or hybrid cars, the EV relay is the only component that operates mechanically in a high-voltage system (DC 450V or higher). Since energy is concentrated in the EV relay in an instant when high or abnormal currents occur in the system, durability and quality control are very important. The EV relay comprises a shaft having a fixed contact connected to an external load such as a motor or drive unit, a movable contact that contacts or separates from the fixed contact to supply or cut off current to the external load, a coil that generates an electromagnetic field to bring the fixed contact and the movable contact into contact, and a spring that elastically supports the movable contact. When power is applied to the coil of the EV relay, an electromagnetic field is generated, and the shaft rises due to this electromagnetic field, and consequently, the movable contact rises, causing the movable contact and the fixed contact to come into contact and current to flow. Here, the shaft, movable contact, spring, and washer that prevents separation of the shaft, movable contact, and spring are core components of the EV relay and are assembled around the shaft to form a single shaft assembly. However, as the assembly of each component is performed manually, there were problems such as reduced productivity, quality variations, and an excessive workload on the workers. FIGS. 1 to 3 illustrate an automatic assembly system for a shaft assembly of an EV relay according to the present invention. FIGS. 4A and FIGS. 4B are drawings showing a shaft assembly unit of the system illustrated in FIGS. 1. FIGS. 5A and FIGS. 5B show a spring assembly unit of the system illustrated in FIGS. 1. FIGS. 6A and FIGS. 6B are drawings showing a movable contact assembly unit of the system illustrated in FIGS. 1. FIGS. 7A and FIGS. 7B show a washer assembly unit of the system illustrated in FIG. 1. FIG. 8 is a figure showing a riveting unit of the system illustrated in FIG. 1. FIGS. 9 and FIGS. 10 are drawings showing the vision unit of the system illustrated in FIG. 1. FIG. 11 is a figure showing a separation discharge unit of the system illustrated in FIG. 1. FIG. 12 is a diagram showing the shaft assembly assembled from each component, with the components of the system illustrated in FIG. 1 simply shown as blocks. Hereinafter, an embodiment of the automatic shaft assembly system for an EV relay according to the present invention will be described in detail with reference to the attached drawings. FIGS. 1 to 3 are drawings showing an automatic assembly system for a shaft assembly of an EV relay according to the present invention. Also, FIGS. 4a and 4b are drawings showing the shaft assembly unit of the system shown in FIG. 1, FIGS. 5a and 5b are drawings showing the spring assembly unit of the system shown in FIG. 1, FIGS. 6a and 6b are drawings showing the movable contact assembly unit of the system shown in FIG. 1, FIGS. 7a and 7b are drawings showing the washer assembly unit of the system shown in FIG. 1, FIG. 8 is a drawing showing the riveting unit of the system shown in FIG. 1, FIGS. 9 and 10 are drawings showing the vision unit of the system shown in FIG. 1, and FIG. 11 is a drawing showing the separation discharge unit of the system shown in FIG. 1. In addition, FIG. 12 is a diagram showing the shaft assembly assembled from each component, with the components of the system illustrated in FIG. 1 simply shown as blocks. The automatic assembly system for a shaft assembly of an EV relay according to the present invention comprises a rotating turntable (10), a shaft assembly unit (20) provided next to the turntable (10), a spring assembly unit (30) provided sequentially next to the shaft assembly unit (20) and provided on the side of the rotation direction of the turntable (10) to surround the turntable (10), a movable contact assembly unit (40), a washer assembly unit (50), a riveting unit (60), and a vision unit (70), and may further comprise a separation discharge module (80) that receives a shaft assembly (5) from the vision un