Universal tool for pressing vortex electric compressor rotor combination and use method

Abstract

The invention discloses a universal tool for pressing a rotor assembly of a vortex electric compressor and a using method. The universal tool is simple in structure and convenient to operate. An eccentric shaft is placed in a first eccentric shaft positioning hole and a second eccentric shaft positioning hole of the base to be positioned, then an auxiliary balance block of a motor rotor is placed in an auxiliary balance block positioning groove of the pressing head to be positioned, and then a pair of guide columns are placed in a pair of guide column guide holes of the pressing head assembly to be matched. And finally, the pressure head assembly is pressed downwards to the end faces of the large ends of the pair of positioning columns through a press machine, and press fitting of a set of rotor assembly is completed.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical pressing, and in particular to a universal tooling for pressing a vortex electric compressor rotor assembly and a use method thereof. Background Art

[0002] Scroll electric compressors are widely used in new energy vehicles of various displacements. As one of the core components of scroll electric compressors, the rotor assembly has very high assembly position and coaxiality accuracy requirements. This requires a high-precision press tooling to press the rotor assembly to achieve the assembly position requirements of the rotor assembly. At present, there are more than 10 different types of scroll electric compressors circulating in the mainstream market. Each type of scroll electric compressor needs to be equipped with a different type of rotor assembly. Each type of rotor assembly requires an investment of 100,000 to hundreds of thousands of special press equipment. In the current market competition, the production enterprises of multiple types of scroll electric compressors have to invest a lot of special press equipment required for press-fitting various types of rotor assemblies. For enterprises that are constantly eliminating old products and are in the process of R&D transformation and mass production of new products, the initial production cost of this large investment is unbearable for enterprises. In order to reduce the equipment cost required for press-fitting rotor assemblies, it is necessary to invent a universal tooling for press-fitting various types of rotor assemblies. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a universal tooling and use method for press-fitting a vortex electric compressor rotor assembly, which has a simple structure and is easy to operate, and can efficiently press-fit a qualified rotor assembly, thereby reducing production costs.

[0004] The object of the present invention is achieved in that:

[0005] A universal tool for press-fitting a vortex electric compressor rotor assembly, comprising a base and a pressure head assembly, wherein a pair of guide columns and a pair of positioning columns are vertically arranged on the base, wherein the pair of guide columns and the pair of positioning columns are cross-distributed along the edge of the base, wherein the pressure head assembly comprises a pressure head cavity seat and a pressure head, wherein the pressure head cavity seat is slidably matched with a pair of guide columns, wherein the positioning columns are in the shape of a stepped shaft, wherein the lower end of the pressure head cavity seat is supported on the end surface of the large end of a pair of positioning columns, wherein an adjusting washer group is sleeved on the small end of the positioning column, wherein the upper end of the adjusting washer group is positioned on the step surface of the positioning column, wherein the lower end of the adjusting washer group is supported on the upper surface of the base, wherein the small end of the positioning column is fixed to the base by a fixing screw, wherein the adjusting washer group is used to adjust the axial distance of the press-fitting, and wherein adjusting washer groups of different thicknesses are selected according to rotor assemblies of different models and specifications;

[0006] A pressure head positioning hole is arranged at the center of the pressure head cavity seat. The pressure head clearance fits in the pressure head positioning hole and is fixed by an axial screw. A secondary balancing block positioning groove and an eccentric shaft guide hole are arranged on the pressure head. The secondary balancing block positioning groove of the pressure head is used for positioning with the secondary balancing block on the rotor, and the eccentric shaft guide hole is used for guiding with the large diameter section of the eccentric shaft. The secondary balancing block positioning groove forms a circumferential limit for the rotor. Different pressure heads are selected according to the combination of rotors of different models and specifications.

[0007] An eccentric shaft locating hole one is arranged at the center of the upper surface of the base, and an eccentric shaft locating hole two is arranged at the bottom of the eccentric shaft locating hole one. The eccentric shaft locating hole one is used for cooperating and limiting with the end of the large diameter section of the eccentric shaft, and the bottom surface of the eccentric shaft locating hole one is used for axial positioning of the end of the large diameter section of the eccentric shaft, and the eccentric shaft locating hole two is used for cooperating and limiting with the eccentric small diameter section of the eccentric shaft. The eccentric shaft locating hole two forms a circumferential limit for the eccentric shaft, and the circumferential relative positions of the rotor and the eccentric shaft after the circumferential limit are the same as those of the rotor combination of corresponding models and specifications.

[0008] Preferably, the axis of the middle hole of the auxiliary balance block and the axis of the rotor are connected, and the axis of the large diameter section and the small diameter section of the eccentric shaft are connected, forming an angle a; the axis of the eccentric small diameter section of the eccentric shaft is eccentric to the axis of the middle hole of the auxiliary balance block and the axis of the rotor, and the eccentric distance is L2; ​​the axis of the eccentric small diameter section of the eccentric shaft is eccentric to the axis of the two side holes of the auxiliary balance block, and the eccentric distance is L3;

[0009] The pressure head is provided with a pair of screw countersunk holes, which are symmetrically arranged, and one of the screw countersunk holes is located in the middle of the auxiliary balance block positioning groove; the axis connecting line of the pair of screw countersunk holes, and the axis connecting line of the eccentric shaft positioning hole 1 and the eccentric shaft positioning hole 2 form an angle a; the axis of the eccentric shaft positioning hole 2 is eccentric to the axis connecting line of the pair of screw countersunk holes, and the eccentric distance is L2; ​​the axis of the eccentric shaft positioning hole 2 is eccentric to the axis connecting line of the arc-shaped parts at both ends of the auxiliary balance block positioning groove, and the eccentric distance is L3;

[0010] The pressure head cavity seat is provided with a pair of guide post guide holes and a pair of screw holes, wherein the pair of screw holes are provided corresponding to the screw countersunk holes and are used to fix the pressure head; the axis connecting line of the pair of guide post guide holes and the axis connecting line of the pair of screw holes form an angle a;

[0011] The base is provided with a pair of positioning post positioning holes and a pair of guide post positioning holes, and the axes of the pair of guide post positioning holes, the first eccentric shaft positioning hole and the second eccentric shaft positioning hole are located on the same straight line.

[0012] Preferably, the end faces of the small ends of a pair of positioning columns and a pair of guide columns are provided with screw holes, and the bottom plane of the base is provided with four screw countersunk holes, and the fixing screws fix the pair of positioning columns and a pair of guide columns to the base through the screw countersunk holes.

[0013] A method for using a universal tool for press-fitting a rotor assembly of a scroll electric compressor comprises placing an eccentric shaft into an eccentric shaft positioning hole 1 and an eccentric shaft positioning hole 2 of a base for positioning, placing a secondary balancing block of the rotor into a secondary balancing block positioning groove of a pressure head for positioning, placing a pair of guide columns into a pair of guide column guide holes of a pressure head assembly for matching, and finally using a press machine to press the pressure head assembly downward to the end faces of the large ends of a pair of positioning columns to complete the press-fitting of a set of rotor assemblies.

[0014] Due to the adoption of the above technical solution, the present invention has the following beneficial effects:

[0015] The present invention can realize the press-fitting of various types of rotor assemblies by using a set of universal tooling, by quickly replacing the pressure head and adjusting the gasket (grouping), and has a simple structure and convenient operation. It can efficiently press-fit qualified rotor assemblies, thereby reducing production costs and improving production efficiency. After batch press-fitting of rotor assemblies, it was verified that the qualified rate of the rotor assemblies pressed by the present invention reached 100%. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an assembly front view of the present invention;

[0017] Figure 2 It is an assembly axonometric drawing of the present invention;

[0018] Figure 3 It is a schematic diagram of a base of the present invention;

[0019] Figure 4 It is a schematic diagram of the pressure head of the present invention;

[0020] Figure 5 It is a schematic diagram of the pressure head cavity seat of the present invention;

[0021] Figure 6 It is a schematic diagram of the pressure head assembly of the present invention;

[0022] Figure 7 It is a schematic diagram of a positioning column of the present invention;

[0023] Figure 8 It is a schematic diagram of a guide column of the present invention;

[0024] Fig. 9 It is a schematic diagram of the adjusting washer of the present invention;

[0025] Fig.10 It is a schematic diagram of the motor rotor of the present invention;

[0026] Fig.11 It is a schematic diagram of the eccentric shaft of the present invention;

[0027] Fig.12 It is a schematic diagram of the rotor assembly of the present invention.

[0028] Reference numerals

[0029] In the accompanying drawings, 1-base, 2-guide column one, 3-pressure head assembly, 4-guide column two, 5-positioning column one, 6-adjusting washer (grouped), 7-positioning column two, 8-fixing screw, 9-pressure head, 10-pressure head cavity seat, 11-eccentric shaft positioning hole one, 12-guide column positioning hole one, 13-eccentric shaft positioning hole two, 14-positioning column positioning hole one, 15-guide column positioning hole two, 16-positioning column positioning hole two, 17-secondary balancing block positioning groove, 18-screw countersunk hole, 19-eccentric shaft guide hole, 20-guide column guide hole one, 21-pressure head positioning hole, 22-screw hole, 23-guide column guide hole two. DETAILED DESCRIPTION

[0030] The embodiments of the invention are described in further detail below in conjunction with the accompanying drawings.

[0031] In this embodiment, the directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "front", "rear", "upper end", and "lower end" are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed or operate in a specific direction. Therefore, they should not be understood as limitations on the present invention.

[0032] A universal tool for press-fitting various types of scroll electric compressor rotor assemblies, such as Figure 1 , Figure 2 As shown, it includes a base, a guide column 1, a guide column 2, a positioning column 1, a positioning column 2, a pressure head assembly, an adjustment washer (grouped) and a fixing screw. The pressure head assembly includes a pressure head cavity seat and a pressure head.

[0033] like Figure 3 , Figure 7 , Figure 8 , Fig.10 , Fig.11 , Fig.12As shown, the base is provided with an eccentric shaft positioning hole 1, an eccentric shaft positioning hole 2, a positioning column positioning hole 1, a positioning column positioning hole 2, a guide column positioning hole 1 and a guide column positioning hole 2; the position requirements L2 and L3 of the eccentric shaft positioning hole 1 and the eccentric shaft positioning hole 2 of the base are set to be completely consistent with the position requirements L2 and L3 of the eccentric shaft center axis, ensuring that the eccentric shaft can be precisely matched and accurately positioned in the eccentric shaft positioning hole 1 and the eccentric shaft positioning hole 2 of the base; the position angle requirement a of the guide column positioning hole 1 and the guide column positioning hole 2 of the base and the eccentric shaft positioning hole 1 is set to be completely consistent with the assembly position angle requirement a of the rotor combination center axis, ensuring that after the motor rotor is pressed into the eccentric shaft, the assembly position a requirement of the rotor combination center axis is achieved; four screw countersunk holes are provided on the bottom plane of the base, and the fixing screws connect and fix the positioning columns 1, 2 and the guide columns 1, 2 to the base through the screw countersunk holes.

[0034] like Figure 1 , Figure 3 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.12 As shown, the small end faces of the positioning columns 1, 2 and the guide columns 1, 2 are provided with screw holes, and the large end faces are provided with anti-rotation countersunk holes. After the positioning columns 1, 2 and the guide columns 1, 2 are precisely matched and assembled with the corresponding positioning holes of the base, the positioning columns 1, 2 and the guide columns 1, 2 are fixed to the base with fixing screws through the screw countersunk holes of the base, and the position of the guide columns is uniquely determined. Through the anti-rotation countersunk holes, the positioning columns 1, 2 and the guide columns 1, 2 can be quickly tightened or removed from the base. The length of the large ends of the positioning columns 1 and 2 is L, and the total distance after superimposing the thickness of the adjustment gasket (group) is set to be uniquely related to the position requirement L1 of the corresponding model rotor combination. After the pressure head assembly moves downward through the guide columns 1 and 2 to the large end faces of the positioning columns 1 and 2, the position requirement L1 of the rotor combination is uniquely determined.

[0035] like Figure 5 , Figure 8 , Fig.12 As shown, the pressure head cavity seat is provided with a pressure head positioning hole, a guide post guide hole 1, a guide post guide hole 2 and a screw hole; the relative position requirements of the pressure head positioning hole, the guide post guide hole 1, the guide post guide hole 2 and the screw hole of the pressure head cavity seat are L2, L3 and a, which are set to be completely consistent with the assembly position requirements L2, L3 and a of the central axis of the rotor combination, and the guide post guide hole 1 and the guide post guide hole 2 of the pressure head cavity seat are set to have a precise clearance fit with the guide posts 1 and 2.

[0036] like Figure 4 , Figure 5 , Fig.10 , Fig.11 , Fig.12As shown, the pressure head is provided with a secondary balancing block positioning groove, an eccentric shaft guide hole and a screw countersunk hole. The relative position requirements of the secondary balancing block positioning groove, the eccentric shaft guide hole and the screw countersunk hole of the pressure head are L2, L3 and a, which are set to be completely consistent with the assembly position requirements L2, L3 and a of the shaft of the rotor combination. The secondary balancing block positioning groove of the pressure head is set to have a precise clearance match with the secondary balancing block part of the motor rotor, the eccentric shaft guide hole of the pressure head is set to have a precise clearance match with the eccentric shaft, and the outer diameter D of the pressure head is set to have a precise clearance match with the pressure head positioning hole of the pressure head cavity seat.

[0037] like Figure 6 , Figure 4 , Figure 5 , Figure 8 , Fig.12 As shown, after the pressure head cavity seat and the pressure head are precisely matched and assembled, they are fixed by screws to form a pressure head assembly. The pressure head assembly can slide up and down in the guide posts 1 and 2 through the guide post guide hole 1 and the guide post guide hole 2. The relative position requirements L2, L3 and a of the guide post guide hole 1 and the guide post guide hole 2 of the pressure head assembly and the fixing screw are set to be completely consistent with the assembly position requirements L2, L3 and a of the central axis of the rotor assembly. The guide post guide hole 1 and the guide post guide hole 2 of the pressure head assembly are set to match the precise clearance of the guide posts 1 and 2. The pressure heads corresponding to the rotor assemblies of various models and specifications can be quickly replaced on the pressure head assembly by loosening or tightening the fixing screws.

[0038] like Fig. 9 As shown, according to the rotor combinations of different models and specifications, adjusting washers (groups) of different thicknesses are provided. The adjusting washers of each group thickness correspond to a rotor combination of one model. After the adjusting washers of each group are assembled with the positioning columns, the corresponding rotor combination position requirement L1 is uniquely determined. The required adjusting washers (groups) can be quickly replaced by tightening the fixing screws.

[0039] As mentioned above, each component of the present invention must first meet the design invention requirements, and then each component is assembled to form a universal pressing tool. The components are precisely matched and constrained with each other, and finally a qualified rotor combination can be efficiently pressed.

[0040] Before press-fitting the rotor assembly, first put the eccentric shaft into the eccentric shaft positioning hole 1 and the eccentric shaft positioning hole 2 of the base. After confirming that it is in place, put the auxiliary balance block part of the motor rotor into the auxiliary balance block positioning groove of the pressure head assembly. After confirming that it is in place, put the guide columns 1 and 2 into the guide column guide holes 1 and 2 of the pressure head assembly. Finally, use a press to press the pressure head assembly down to the large end face of the positioning columns 1 and 2 to complete the press-fitting of a set of rotor assemblies. When the press presses downward to the small end face of the pressure head cavity seat, the pressure is transmitted to the auxiliary balance block on the motor rotor through the pressure head auxiliary balance block positioning groove, so that the motor rotor moves downward and the eccentric shaft moves upward relative to the motor rotor; the depth position of the eccentric shaft guide hole of the pressure head ensures that during the process of press-fitting the rotor assembly, the upper end of the eccentric shaft will not interfere with the pressure head cavity seat. The pressure head cavity seat, as an intermediate mechanism for transmitting pressure, does not come into contact with the eccentric shaft.

[0041] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A universal tool for press-fitting a scroll electric compressor rotor assembly, characterized in that: It comprises a base and a pressure head assembly, wherein a pair of guide columns and a pair of positioning columns are vertically arranged on the base, and the pair of guide columns and a pair of positioning columns are cross-distributed along the edge of the base, and the pressure head assembly comprises a pressure head cavity seat and a pressure head, and the pressure head cavity seat is slidably matched with a pair of guide columns, and the positioning columns are in the shape of a stepped shaft, and the lower end of the pressure head cavity seat is supported on the end surface of the large end of a pair of positioning columns, and an adjusting washer group is sleeved on the small end of the positioning column, and the upper end of the adjusting washer group is positioned on the step surface of the positioning column, and the lower end of the adjusting washer group is supported on the upper surface of the base, and the small end of the positioning column is fixed to the base by a fixing screw, and the adjusting washer group is used to adjust the axial distance of the press-fitting, and adjusting washer groups of different thicknesses are selected according to rotor combinations of different models and specifications; A pressure head positioning hole is arranged at the center of the pressure head cavity seat. The pressure head clearance fits in the pressure head positioning hole and is fixed by an axial screw. A secondary balancing block positioning groove and an eccentric shaft guide hole are arranged on the pressure head. The secondary balancing block positioning groove of the pressure head is used for positioning with the secondary balancing block on the motor rotor, and the eccentric shaft guide hole is used for guiding with the large diameter section of the eccentric shaft. The secondary balancing block positioning groove forms a circumferential limit for the rotor. Different pressure heads are selected according to the combination of rotors of different models and specifications. An eccentric shaft locating hole one is arranged at the center of the upper surface of the base, and an eccentric shaft locating hole two is arranged at the bottom of the eccentric shaft locating hole one. The eccentric shaft locating hole one is used for cooperating and limiting with the end of the large diameter section of the eccentric shaft, and the bottom surface of the eccentric shaft locating hole one is used for axial positioning of the end of the large diameter section of the eccentric shaft, and the eccentric shaft locating hole two is used for cooperating and limiting with the eccentric small diameter section of the eccentric shaft. The eccentric shaft locating hole two forms a circumferential limit for the eccentric shaft, and the circumferential relative positions of the rotor and the eccentric shaft after the circumferential limit are the same as those of the rotor combination of corresponding models and specifications.

2. The universal tooling for press-fitting a scroll electric compressor rotor assembly according to claim 1 is characterized in that: The connecting line of the axis of the middle hole of the auxiliary balance block and the axis of the rotor, and the connecting line of the axis of the large diameter section and the small diameter section of the eccentric shaft form an angle a; the axis of the eccentric small diameter section of the eccentric shaft relative to the connecting line of the axis of the middle hole of the auxiliary balance block and the axis of the rotor is eccentric by a distance of L2; the axis of the eccentric small diameter section of the eccentric shaft relative to the connecting line of the axis of the two side holes of the auxiliary balance block is eccentric by a distance of L3; The pressure head is provided with a pair of screw countersunk holes, which are symmetrically arranged, and one of the screw countersunk holes is located in the middle of the auxiliary balance block positioning groove; the axis connecting line of the pair of screw countersunk holes, and the axis connecting line of the eccentric shaft positioning hole 1 and the eccentric shaft positioning hole 2 form an angle a; the axis of the eccentric shaft positioning hole 2 is eccentric to the axis connecting line of the pair of screw countersunk holes, and the eccentric distance is L2; ​​the axis of the eccentric shaft positioning hole 2 is eccentric to the axis connecting line of the arc-shaped parts at both ends of the auxiliary balance block positioning groove, and the eccentric distance is L3; The pressure head cavity seat is provided with a pair of guide post guide holes and a pair of screw holes, wherein the pair of screw holes are provided corresponding to the screw countersunk holes and are used to fix the pressure head; the axis connecting line of the pair of guide post guide holes and the axis connecting line of the pair of screw holes form an angle a; The base is provided with a pair of positioning post positioning holes and a pair of guide post positioning holes, and the axes of the pair of guide post positioning holes, the first eccentric shaft positioning hole and the second eccentric shaft positioning hole are located on the same straight line.

3. The universal tooling for press-fitting a scroll electric compressor rotor assembly according to claim 1 is characterized in that: The end faces of the small ends of a pair of positioning columns and a pair of guide columns are provided with screw holes, and the bottom plane of the base is provided with four screw countersunk holes. The fixing screws fix the pair of positioning columns and a pair of guide columns on the base through the screw countersunk holes.

4. A method for using a universal tool for press-fitting a scroll electric compressor rotor assembly, characterized in that: Place the eccentric shaft into the eccentric shaft positioning hole 1 and the eccentric shaft positioning hole 2 of the base for positioning, then place the auxiliary balance block of the rotor into the auxiliary balance block positioning groove of the pressure head for positioning, then place a pair of guide columns into the pair of guide column guide holes of the pressure head assembly for matching, and finally use a press to press the pressure head assembly down to the end face of the large end of the pair of positioning columns to complete the press assembly of a set of rotor assemblies.

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