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JP-2026514201-A - Compressor coupling member for connecting the drive shaft and the movable helix in a scroll compressor.

JP2026514201AJP 2026514201 AJP2026514201 AJP 2026514201AJP-2026514201-A

Abstract

[Problem] The objective of the present invention is to design a compressor coupling member having a cost-effectively integrated counterweight. [Solution] A compressor coupling member for coupling a compressor drive shaft and a movable helix, comprising: a planar body including a front surface and a back surface facing the front surface; a cylindrical coupling neck formed integrally with the planar body, fastened to the planar body, or inserted into the planar body; and a counterweight having an arched outer shell, wherein the cylindrical axis of the cylindrical coupling neck extends perpendicularly to the plane of the planar body, and the cylindrical coupling neck protrudes axially from the planar body on the front surface of the planar body in relation to the cylindrical axis of the cylindrical coupling neck. [Selection Diagram] 5B

Inventors

  • ポッシェンリーダー， ウーヴェ
  • ホッペン， ユルゲン

Assignees

  • ハンオン システムズ

Dates

Publication Date
20260507
Application Date
20230926
Priority Date
20221011

Claims (11)

  1. A compressor coupling member (1) that connects the drive shaft and the movable helix of the compressor, A planar body (2) including a front surface (2a) and a rear surface (2b) facing the front surface, A cylindrical coupling neck (3) is formed integrally with the planar body (2), fastened to the planar body (2), or inserted into the planar body (2), The cylindrical shaft (4) of the cylindrical coupling neck (3) extends perpendicularly to the plane of the planar body (2), and the cylindrical coupling neck (3) protrudes axially from the planar body (2) on the front surface (2a) of the planar body (2) in relation to the cylindrical shaft (4) of the cylindrical coupling neck (3). A counterweight (8) is formed in the shape of at least partially hollow cylindrical segments and has an arched outer shell, The counterweight (8) is integrally formed from an outer region (7) of the planar body (2) that partially surrounds the cylindrical coupling neck (3), and a neck peripheral region (6) that is formed concentrically with the cylindrical axis (4) and completely surrounds the cylindrical coupling neck (3), and on the back surface (2b) of the planar body (2), it protrudes axially beyond the planar body (2), The planar body (2) includes opposing outer edge regions (14, 15), The outer edge regions (14, 15) extend from the arched base edge region (16) of the planar body (2) that partially encloses the neck peripheral region (6) to the ends of the counterweight (8) that face each other in the arc direction of the counterweight (8), A compressor coupling member for connecting the compressor's drive shaft and movable helix, characterized in that it extends linearly from the outer contour of the planar body (2) in the form of V-shaped legs arranged at increasingly greater intervals.
  2. The compressor coupling member according to claim 1, characterized in that, in order to reinforce the compressor coupling member (1), one or more support members (20) are further formed in the region of the planar body (2) adjacent to the outer edge region (14, 15) extending in the shape of the V-leg.
  3. The compressor coupling member according to claim 2, characterized in that the plurality of support members (20) are reinforcing ribs with a rib structure that protrudes from the planar body (2) in the axial direction on the back surface (2b) of the planar body (2).
  4. The compressor coupling member according to claim 3, characterized in that the rib structure having the reinforcing ribs embodied by the plurality of support members (20) extends to the counterweight (8).
  5. The compressor coupling member according to claim 4, characterized in that the rib structure is realized by a plurality of support members (20) and includes two reinforcing ribs adjacent to one of the opposing outer edge regions (14, 15).
  6. The compressor coupling member according to claim 5, characterized in that the two reinforcing ribs, embodied by the plurality of support members (20), each extend to one of the ends of the counterweight (8) that are opposite to each other in the arc direction.
  7. The compressor coupling member according to claim 6, characterized in that the reinforcing ribs, embodied by the plurality of support members (20), precisely protrude axially from the back surface (2b) of the planar body (2) to the counterweight (8) that protrudes beyond the planar body (2).
  8. The compressor coupling member (1) is characterized by being manufactured by a metal powder molding process, as described in claim 7.
  9. The compressor coupling member (1) is characterized by being manufactured by a steel powder compression method, as described in claim 8.
  10. The compressor coupling member according to claim 9, characterized in that the cylindrical coupling neck (3) includes a receiving bore (5) whose orientation is eccentrically set with respect to the cylindrical shaft (4).
  11. A compressor housing (2), and two interleaving spirals provided inside the compressor housing (2), One of the two interleaving helices is fixed, while the other helice is eccentrically movable on a circular orbit. The volume of the compression chamber formed between the helices can be periodically changed by the movement of the helices. The compressor coupling member (1) according to any one of claims 1 to 10 is rotatable together with the eccentric drive unit and the drive shaft (12), The other helix can move along a circular orbit using the eccentric drive unit, A compressor for a gaseous fluid, characterized in that the other helix is eccentrically connected to the drive shaft (12) via the compressor coupling member (1).

Description

The present invention relates to a compressor coupling member for connecting a drive shaft and a movable helix in a scroll compressor, and more particularly to a compressor coupling member having a cost-effectively integrally formed counterweight. This invention relates to a compressor for gaseous fluids, such as refrigerants, in which a compressor coupling member movably formed with the drive shaft of the scroll compressor is used to transmit driving torque. This invention is primarily applicable to electric scroll refrigerant compressors for automobiles. Compression typically involves a compressor housing containing two insertions. One of the two insertion helices is fixed, while the other is eccentrically movable on a circular orbit; such a movable helix is also called a spiral helix or scroll. As a result of this helical movement, the volume of the compression chamber formed between the helices changes periodically, drawing in and compressing a gas, such as a refrigerant. The movable helix typically moves along a circular orbit using an eccentric drive unit. The eccentric drive unit consists of a drive shaft that rotates around a pivot axis, and a counterweight rotatably and fixedly connected to the drive shaft, which rotates with the drive shaft. In conventional technology, a rotatable compressor coupling member, including an integrally formed counterweight, was used to drive the movable helix from the compressor's drive shaft. This means that the eccentric drive unit includes at least one drive shaft rotating around a rotation axis, and a compressor coupling member rotating with the drive shaft and including a counterweight. Therefore, the movable helix is eccentrically connected to the drive shaft via the compressor coupling member, and the axes of the movable helix and the drive shaft cancel each other out. The compressor coupling member includes a planar body as an internal component, with the axis of rotation, which is the center of rotation of the compressor coupling member, extending perpendicularly through this plane. This planar body is also called the shaft extension of the drive shaft and can be connected to the drive shaft, for example, via a connecting neck. Furthermore, the compressor coupling member rotating with the drive shaft includes a counterweight as an external component, the counterweight having an arc-shaped outer profile and at least partially in the form of a hollow cylindrical segment. Such a counterweight is offset rearward from the axial direction of the axis of rotation relative to the planar body, and therefore, the side surface of the hollow cylindrical segment surrounds a portion of the circumference of the drive shaft within the end region of the drive shaft shank. For connection to the compressor coupling member, the drive shaft includes an eccentric and offset connecting neck that is integrally formed with, inserted into, or fastened to the end face of the drive shaft, and the longitudinal axis of the connecting neck is oriented to offset parallel to the longitudinal axis of the drive shaft. Carbon steel, in particular, is used as the material for the coupling components of the compressor. This design is sufficient within the previous range of applications, where a limited maximum rotational speed is used. The range of use for compressor coupling members with integrally formed counterweights is limited by the load generated during operation due to the required shape. This invention aims to enable a cost-effective manufacturing process and materials, allowing the range of use to increase speed at higher rotational speeds. The compressor coupling member with a counterweight is a coupling member that transmits scroll compression drive from the drive shaft. The compressor coupling member is intended to partially balance the imbalance in system induction of the scroll compression unit between the coupling neck with a bore receptacle for the coupling neck of the drive shaft and the scroll compression unit itself. The load during operation generates localized stress at the connection point between the counterweight body and the sleeve. This localized stress limits the operating range, which is dependent on the patented material properties and the geometric structure/ratios of the components. This is due to the expanded operating range of the compressor. Compared to the previous limit of approximately 9,000 RPM, the maximum rotational speed must now be 11,000 RPM. Cost is a driving force for competitiveness. Metal powder forming is chosen for potential cost reductions. However, metal powder alloys have lower mechanical load capacity due to reduced modulus and yield strength. In the form of standard coupling components in compressors, structural stresses generated during operation limit the range of motion of the components. The load during operation generates localized stress at the connection between the counterweight body and the sleeve. This localized stress limits the op