Eccentric block mechanism for cross slip ring

Abstract

The utility model discloses a cross slip ring type eccentric block mechanism which comprises a compressor shell, a crankshaft is arranged on the inner side of the compressor shell, one end of the crankshaft is connected with an eccentric block, one end of the eccentric block is connected with a movable scroll plate in a sleeved mode, and a needle bearing is installed on the inner side of the movable scroll plate. According to the technical scheme, due to the fact that the transition sleeve is pressed into the outer side of the eccentric block in an interference mode and the movable scroll plate with the needle bearing is connected, abrasion of the eccentric block can be reduced under high-speed operation of the eccentric block, meanwhile, the eccentric block can be prevented from being damaged, and the service life of the eccentric block is prolonged. The hardness of the eccentric block does not need to be intentionally improved, and machining cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electric compressors, in particular to an eccentric block mechanism for a cross slip ring type. Background Art

[0002] When the electric scroll compressor is working, the motor drives the crankshaft to rotate, and the crankshaft connected to the eccentric block rotates. The eccentric block drives the orbiting scroll equipped with a needle roller bearing to move. Because the orbiting scroll is affected by the cross slip ring anti-self-rotation mechanism, it performs eccentric translational motion and forms a compression chamber with the static scroll to complete gas compression, achieving the function of an automobile air-conditioning compressor.

[0003] Under this structure, the eccentric block, which is in direct contact with the needle bearing roller, experiences rolling friction with the roller at high speed. The hardness of the roller is generally between HRC60-65, which causes the eccentric block to wear faster. In order to increase the life of the compressor, the existing technology will increase the hardness of the eccentric block. However, when the hardness is increased, the eccentric hole of the eccentric block needs to be processed using a grinder, which greatly increases the processing cost.

[0004] Therefore, those skilled in the art provide an eccentric block mechanism for a cross slip ring to solve the problems raised in the above background technology. Utility Model Content

[0005] The purpose of the utility model is to solve the shortcomings of the prior art and to propose an eccentric block mechanism for a cross slip ring type.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] An eccentric block mechanism for a cross-slip ring type includes a compressor housing, a crankshaft is arranged on the inside of the compressor housing, an eccentric block is connected to one end of the crankshaft, a movable scroll is sleeved on one end of the eccentric block, a needle bearing is installed on the inside of the movable scroll, a transition sleeve is sleeved on one end of the outer side of the eccentric block, and the needle bearing is sleeved and connected to the outside of the transition sleeve.

[0008] Preferably, the eccentric block and the transition sleeve are connected by interference fit.

[0009] Compared with the prior art, the beneficial effects of the present invention are:

[0010] The technical solution designed by the utility model can reduce the wear of the eccentric block under high-speed operation of the eccentric block by interference pressing a transition sleeve into the outer side of the eccentric block and connecting the movable scroll plate with a needle bearing. At the same time, there is no need to deliberately increase the hardness of the eccentric block, thereby reducing the processing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more specifically and intuitively illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for describing the embodiments or the prior art.

[0012] Figure 1 This is a schematic diagram of the structure of an eccentric block mechanism for a cross slip ring type proposed by the utility model;

[0013] Figure 2 This is a schematic diagram of the transition sleeve installation structure proposed in the present utility model.

[0014] In the figure: 1. Crankshaft; 2. Eccentric block; 3. Needle roller bearing; 4. Orbiting scroll; 5. Transition sleeve. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0016] Reference Figure 1-2 An eccentric block mechanism for a cross-slip ring type includes a compressor housing 1, a crankshaft 1 is arranged inside the compressor housing 1, an eccentric block 2 is connected to one end of the crankshaft 1, a movable scroll 4 is sleeved and connected to one end of the eccentric block 2, a needle roller bearing 3 is installed inside the movable scroll 4, a transition sleeve 5 is sleeved on one end of the outer side of the eccentric block 2, and the needle roller bearing 3 is sleeved and connected to the outer side of the transition sleeve 5, and the eccentric block 2 and the transition sleeve 5 are connected by an interference fit;

[0017] The eccentric block 2 is quenched and tempered, and its hardness is controlled at HBS220-250. Based on this hardness, it can be processed by a machining center, which ensures the precision of the parts while reducing the cost. The transition sleeve 5 is interference-pressed into the quenched and tempered eccentric block 2. When the transition sleeve 5 rotates with the eccentric block 2, it drives the orbiting scroll 4 equipped with the needle roller bearing 3 to move.

[0018] The material of the transition sleeve is GCr15, and the hardness is controlled between HRC60-65;

[0019] Compared with existing technologies, the eccentric block 2 is tempered and the eccentric hole is machined in a machining center, which not only ensures part precision but also reduces processing costs. On this basis, the transition sleeve 5 is interference-pressed into the eccentric block 2. The hardness of the transition sleeve 5 is controlled between HRC60-65, which reduces wear between the eccentric block 2 and the needle roller bearing 3 during operation.

[0020] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An eccentric block mechanism for a cross-slip ring type, comprising a compressor housing (1), characterized in that: A crankshaft (1) is provided inside the compressor housing (1), one end of the crankshaft (1) is connected to an eccentric block (2), one end of the eccentric block (2) is sleeved and connected to a movable scroll (4), a needle roller bearing (3) is installed inside the movable scroll (4), one end of the outer side of the eccentric block (2) is sleeved with a transition sleeve (5), and the needle roller bearing (3) is sleeved and connected to the outer side of the transition sleeve (5).

2. The eccentric block mechanism for a cross slip ring according to claim 1, characterized in that: The eccentric block (2) and the transition sleeve (5) are connected by interference fit.

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