Tool for assembling scroll compressor

Abstract

The utility model discloses a tool for assembling a scroll compressor, which comprises an expansion sleeve II, an expansion sleeve I and a mandrel, the mandrel comprises a cylindrical surface I arranged at the upper end and a cylindrical surface III arranged at the lower end, a main bearing support is matched with the cylindrical surface I of the mandrel, and an auxiliary bearing support is matched with the cylindrical surface III of the mandrel; the outer side of the cylindrical surface I is sleeved with an expansion sleeve II, the inner wall of the expansion sleeve II is matched with the outer wall of the cylindrical surface I, and the lower end of the outer wall of the expansion sleeve II is matched with the inner wall of the lower end of the mounting hole of the main bearing support; the expansion sleeve I is sleeved at the upper end of the expansion sleeve II, the inner wall of the expansion sleeve II is matched with the upper end of the outer wall of the expansion sleeve II, and the outer wall of the expansion sleeve I is matched with the inner wall of the upper end of the mounting hole of the main bearing support. According to the utility model, the mounting procedure can be simplified, auxiliary equipment and clamps are not needed to assist in assembly, the cost is low, and the matching precision is high.

Description

Technical Field

[0001] The utility model relates to a tool for assembling a scroll compressor, belonging to the technical field of scroll compressor assembly. Background Art

[0002] Scroll compressors are increasingly used in the refrigeration industry. Existing scroll compressors consist of a fixed scroll and an orbiting scroll. Their operating principle is as follows: the fixed scroll is equipped with spiral volutes, while the orbiting scroll, also equipped with spiral volutes, works in concert with it. The orbiting scroll, through its movement between a cross ring and an upper support, restricts the two scrolls to relative translation, forming multiple compression chambers with variable volumes. The orbiting scroll is connected to a drive shaft, which is driven by a motor, causing the orbiting scroll to orbit along its orbital path, thereby inhaling, compressing, and expelling gas, ultimately compressing the refrigerant.

[0003] In a fully enclosed compressor, the scroll component is installed inside the compressor casing. The casing consists of a shell, an upper cover, and a lower cover, and the motor is usually fixed inside the shell. The upper end is equipped with a main bearing support to support the movable scroll, and the lower end is equipped with a secondary bearing. The drive shaft that drives the movable scroll is located between the main and secondary bearings. The coaxiality of the main and secondary bearings is crucial to the energy efficiency of the compressor. If the coaxiality is poor, it may lead to increased input power of the compressor, shortened life, or even failure to operate normally and be scrapped. In addition, the perpendicularity of the plane supporting the movable scroll on the main bearing and the drive shaft is also very critical. Poor perpendicularity may lead to increased power and even affect normal operation.

[0004] In the assembly process of the existing technology, the upper main bearing support is generally fixed by a tray, and the lower auxiliary bearing support is clamped by a clamp for assembly. The assembly also requires the use of special equipment for auxiliary installation to ensure the coaxiality of the main and auxiliary bearings and the perpendicularity of the support surface and the drive shaft. In the above assembly process, the welding of the motor stator and the housing, the welding of the main bearing support and the welding of the auxiliary bearing support are completed on different equipment respectively. The assembly process is cumbersome, and the installation accuracy is heavily dependent on auxiliary tools, which increases the installation cost.

[0005] In summary, the existing technology has obvious inconveniences and defects in actual use, so it is necessary to improve it. Utility Model Content

[0006] In view of the deficiencies in the background technology, the utility model provides a tool for assembling a scroll compressor, which can simplify the installation procedure, does not require auxiliary equipment and fixtures to assist in assembly, has low cost and high matching precision.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0008] A tool for assembling a scroll compressor, comprising an expansion sleeve II, an expansion sleeve I, and a core shaft, wherein the core shaft comprises a cylindrical surface I disposed at an upper end and a cylindrical surface III disposed at a lower end, a main bearing support cooperates with the core shaft cylindrical surface I, and a secondary bearing support cooperates with the core shaft cylindrical surface III;

[0009] An expansion sleeve II is sleeved on the outer side of the cylindrical surface I. The inner wall of the expansion sleeve II matches the outer wall of the cylindrical surface I. The lower end of the outer wall of the expansion sleeve II matches the inner wall of the lower end of the mounting hole of the main bearing support.

[0010] The expansion sleeve I is mounted on the upper end of the expansion sleeve II, the inner wall of the expansion sleeve II matches the upper end of the outer wall of the expansion sleeve II, and the outer wall of the expansion sleeve I matches the inner wall of the upper end of the mounting hole of the main bearing support.

[0011] Furthermore, a slope IV is provided at the lower end of the cylindrical surface I, and a slope III is provided at the lower end of the inner wall of the expansion sleeve II, and the slope IV and the slope III cooperate with each other.

[0012] Furthermore, an upper end of the outer wall of the expansion sleeve II is provided with an inclined surface II, and an inner wall of the expansion sleeve I is provided with an inclined surface I, and the inclined surface II and the inclined surface I cooperate with each other.

[0013] Furthermore, the lower end of the outer wall of the expansion sleeve I extends outward to form a mating ring, and the outer end of the mating ring is matched with the upper end of the main bearing support mounting hole; the upper end of the expansion sleeve I is a sealing plate with a bolt hole, and a bolt is provided at the bolt hole, and the bolt is installed on the upper end of the core shaft cylindrical surface I.

[0014] Furthermore, a plurality of side grooves I are provided on the side wall of the expansion sleeve I along its axial direction, and a plurality of side grooves II are provided on the side wall of the expansion sleeve II along its axial direction.

[0015] Furthermore, a main bearing support limiting shoulder is provided at the lower end of the core shaft cylindrical surface I, so that the lower end surface of the main bearing support is close to the main bearing support limiting shoulder.

[0016] Furthermore, two discs are provided in the middle section of the core shaft, and the side walls of the two discs form a cylindrical surface II, which matches the inner wall of the inner hole of the motor stator.

[0017] Furthermore, the lower side of the lower disc protrudes outward to form a stator limiting shoulder, and the stator limiting shoulder cooperates with the lower end surface of the motor stator.

[0018] Furthermore, the auxiliary bearing support includes a support seat and a center seat, the center seat is fixed at the middle position of the lower side of the support seat, the support seat is placed on the upper end of the tray, and the center hole of the center seat matches the cylindrical surface III.

[0019] Compared with the prior art, the present invention has the following advantages after adopting the above technical solution:

[0020] Under the action of expansion sleeve I and expansion sleeve II, the main bearing support and the core shaft are guaranteed to be coaxial, and the core shaft and the auxiliary bearing support are coaxial, which ensures the coaxiality of the main bearing support and the auxiliary bearing support. The inclined surface IV and the inclined surface III cooperate with each other, which improves the matching accuracy between the cylindrical surface I and the expansion sleeve II. The inclined surface II and the inclined surface I cooperate with each other, which improves the matching accuracy between the expansion sleeve I and the expansion sleeve II; and because the end face of the main bearing support and the core shaft are perpendicular to each other, the perpendicularity of the end face of the main bearing support and the drive shaft is also guaranteed.

[0021] The entire assembly process does not require the use of auxiliary equipment, which saves costs, and the assembly is simple and fast with high matching precision.

[0022] The present invention will be described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the external structure of the utility model;

[0024] Figure 2 yes Figure 1 Internal cross-sectional view of

[0025] Figure 3 This is a schematic structural diagram of the core shaft of the utility model;

[0026] Figure 4 This is a structural diagram of the expansion sleeve I in the utility model;

[0027] Figure 5 It is a structural schematic diagram of the expansion sleeve II in the utility model.

[0028] In the figure,

[0029] 1-bolt, 2-expansion sleeve I, 3-expansion sleeve II, 4-core shaft, 5-main bearing support, 6-motor stator, 7-housing, 8-auxiliary bearing support, 801-support seat, 802-center seat, 9-tray, 10-inclined surface I, 11-side groove I, 12-inclined surface II, 13-inclined surface III, 14-matching ring, 15-side groove II, 16-cylindrical surface I, 17-inclined surface IV, 18-cylindrical surface II, 19-cylindrical surface III, 20-statator limit shoulder, 21-main bearing support limit shoulder. DETAILED DESCRIPTION

[0030] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation methods of the present invention are now described with reference to the accompanying drawings.

[0031] like Figure 1-5As shown, the utility model provides a tool for assembling a scroll compressor, including an expansion sleeve II 3, an expansion sleeve I 2 and a core shaft 4. The core shaft 4 includes a cylindrical surface I 16 provided at the upper end and a cylindrical surface III 19 provided at the lower end. The main bearing support 5 cooperates with the cylindrical surface I 16 of the core shaft 4, and the secondary bearing support 8 cooperates with the cylindrical surface III 19 of the core shaft 4.

[0032] An expansion sleeve II 3 is sleeved on the outer side of the cylindrical surface I 16 , the inner wall of the expansion sleeve II 3 matches the outer wall of the cylindrical surface I 16 , and the lower end of the outer wall of the expansion sleeve II 3 matches the inner wall of the lower end of the mounting hole of the main bearing support 5 ;

[0033] The expansion sleeve I2 is mounted on the upper end of the expansion sleeve II3, the inner wall of the expansion sleeve II3 matches the upper end of the outer wall of the expansion sleeve II3, and the outer wall of the expansion sleeve I2 matches the inner wall of the upper end of the mounting hole of the main bearing support 5.

[0034] The cylindrical surface Ⅰ16 of the core shaft 4 is coaxially arranged with the expansion sleeve Ⅱ3, the expansion sleeve Ⅱ3 is coaxially arranged with the expansion sleeve Ⅰ2, and the lower end of the mounting hole of the main bearing support 5 cooperates with the expansion sleeve Ⅱ3, and the upper end of the mounting hole of the main bearing support 5 cooperates with the expansion sleeve Ⅰ2, thereby ensuring that the core shaft 4 and the main bearing support 5 are coaxially arranged. At the same time, the secondary bearing support 8 cooperates with the cylindrical surface Ⅲ19 of the core shaft 4, so that the secondary bearing support 8 is coaxial with the core shaft 4, thereby ensuring that the main bearing support 5 and the secondary bearing support 8 are coaxial.

[0035] Furthermore, a slope IV17 is provided at the lower end of the cylindrical surface I16, and a slope III13 is provided at the lower end of the inner wall of the expansion sleeve II3. The slope IV17 cooperates with the slope III13 to improve the cooperation accuracy between the cylindrical surface I16 and the expansion sleeve II3.

[0036] Furthermore, an inclined surface II12 is provided on the upper end of the outer wall of the expansion sleeve II3, and an inclined surface I10 is provided on the inner wall of the expansion sleeve I2. The inclined surface II12 cooperates with the inclined surface I10 to improve the cooperation accuracy of the expansion sleeve I2 and the expansion sleeve II3.

[0037] The lower end of the outer wall of the expansion sleeve I2 extends outward to form a matching ring 14, and the outer end of the matching ring 14 matches with the upper end of the mounting hole of the main bearing support 5; the upper end of the expansion sleeve I2 is a sealing plate with a bolt hole, and a bolt 1 is provided at the bolt hole. The bolt 1 is installed on the upper end of the cylindrical surface I16 of the core shaft 4, thereby firmly fixing the expansion sleeve II3 and the expansion sleeve I2 on the core shaft 4, further improving the matching accuracy.

[0038] The side wall of the expansion sleeve I2 is provided with a plurality of side grooves I11 along its axial direction, and the side wall of the expansion sleeve II3 is provided with a plurality of side grooves II15 along its axial direction, so that the surface-to-surface fit is tighter.

[0039] A main bearing support limit shoulder 21 is provided at the lower end of the cylindrical surface Ⅰ16 of the core shaft 4, so that the lower end surface of the main bearing support 5 is close to the main bearing support limit shoulder 21, thereby ensuring the verticality of the main bearing support 5 and the core shaft 4, and at the same time ensuring the axial position of the main bearing support 5.

[0040] The middle section of the core shaft 4 is provided with two discs, the side walls of which form a cylindrical surface II 18, which matches the inner wall of the inner hole of the motor stator 6. Thus, the motor stator 6 is positioned so that the motor stator 6 and the core shaft 4 are coaxial.

[0041] The lower side of the lower disc protrudes outward to form a stator limit shoulder 20, which cooperates with the lower end surface of the motor stator 6 to ensure the verticality of the motor stator 6 and the core shaft 4, while ensuring the axial position of the motor stator 6.

[0042] The secondary bearing support 8 includes a support seat 801 and a center seat 802. The center seat 802 is fixed at the middle position of the lower side of the support seat 801. The support seat 801 is placed on the upper end of the tray 9. The center hole of the center seat 802 matches the cylindrical surface III19.

[0043] The outer sides of the expansion sleeve II3, the expansion sleeve I2 and the core shaft 4 are covered with a housing 7.

[0044] Under the action of the expansion sleeve I2 and the expansion sleeve II3, the main bearing support 5 and the core shaft 4 are guaranteed to be coaxial, and the core shaft 4 and the auxiliary bearing support 8 are coaxial, which ensures that the main bearing support 5 and the auxiliary bearing support 8 are coaxial. The inclined surface IV17 cooperates with the inclined surface III13 to improve the matching accuracy between the cylindrical surface I16 and the expansion sleeve II3. The inclined surface II12 cooperates with the inclined surface I10 to improve the matching accuracy between the expansion sleeve I2 and the expansion sleeve II3. Because the end face of the main bearing support 5 and the core shaft 4 are perpendicular to each other, the perpendicularity of the end face of the main bearing support and the drive shaft is also guaranteed.

[0045] The utility model also provides a method for assembling a scroll compressor, comprising the following steps:

[0046] S1, place the secondary bearing support 8 on the tray 9, and insert the cylindrical surface III19 of the core shaft 4 into the secondary bearing support 8;

[0047] S2, the motor stator 6 is mounted on the disk of the core shaft 4 and matched with the cylindrical surface II 18, and the core shaft 4 limits the motor stator 6 through the motor stator limit shoulder 20;

[0048] S3, shrink-fit the housing 7 onto the outside of the motor stator 6, then fit the main bearing support 5 onto the core shaft 4 and mate with the cylindrical surface I 16. The core shaft 4 limits the main bearing support 8 via the main bearing support limit stop 21;

[0049] S4, insert expansion sleeve II3 and expansion sleeve I2 respectively, and make the inclined surface I10 fit with the inclined surface II12, and the inclined surface III13 fit with the inclined surface IV17;

[0050] S5, tighten the bolt 1 and weld the main bearing support 5 and the auxiliary bearing support 8 to the housing 7;

[0051] S6, remove the center seat 802 from the support seat 801, pull out the core shaft 4, install the drive shaft into the compressor, and finally connect the movable scroll to the drive shaft.

[0052] The entire assembly process does not require the use of auxiliary equipment, which saves costs, and the assembly is simple and fast with high matching precision.

[0053] The above description is merely an example of the preferred embodiment of the present invention. Any details not described in detail are common knowledge within the art. The scope of protection of the present invention is determined by the claims. Any equivalent modifications based on the technical teachings of the present invention are also within the scope of protection of the present invention.

Claims

1. A tool for assembling a scroll compressor, characterized by: It comprises an expansion sleeve II (3), an expansion sleeve I (2) and a core shaft (4), wherein the outer sides of the expansion sleeve II (3), the expansion sleeve I (2) and the core shaft (4) are sheathed with a shell (7); The core shaft (4) includes a cylindrical surface I (16) arranged at the upper end and a cylindrical surface III (19) arranged at the lower end, the main bearing support (5) cooperates with the cylindrical surface I (16) of the core shaft (4), and the auxiliary bearing support (8) cooperates with the cylindrical surface III (19) of the core shaft (4); An expansion sleeve II (3) is sleeved on the outer side of the cylindrical surface I (16), the inner wall of the expansion sleeve II (3) matches the outer wall of the cylindrical surface I (16), and the lower end of the outer wall of the expansion sleeve II (3) matches the inner wall of the lower end of the mounting hole of the main bearing support (5); The expansion sleeve I (2) is mounted on the upper end of the expansion sleeve II (3), the inner wall of the expansion sleeve II (3) matches the upper end of the outer wall of the expansion sleeve II (3), and the outer wall of the expansion sleeve I (2) matches the inner wall of the upper end of the mounting hole of the main bearing support (5).

2. The scroll compressor assembly tool according to claim 1, characterized in that: The lower end of the cylindrical surface I (16) is provided with an inclined surface IV (17), and the lower end of the inner wall of the expansion sleeve II (3) is provided with an inclined surface III (13), and the inclined surface IV (17) and the inclined surface III (13) cooperate with each other.

3. The scroll compressor assembly tool according to claim 2, characterized in that: The upper end of the outer wall of the expansion sleeve II (3) is provided with an inclined surface II (12), and the inner wall of the expansion sleeve I (2) is provided with an inclined surface I (10), and the inclined surface II (12) and the inclined surface I (10) cooperate with each other.

4. The scroll compressor assembly tool according to claim 1, wherein: The lower end of the outer wall of the expansion sleeve I (2) extends outward to form a matching ring (14), and the outer end of the matching ring (14) matches the upper end of the mounting hole of the main bearing support (5); the upper end of the expansion sleeve I (2) is a sealing plate with a bolt hole, and a bolt (1) is provided at the bolt hole, and the bolt (1) is installed on the upper end of the cylindrical surface I (16) of the core shaft (4).

5. The scroll compressor assembly tool according to claim 3, characterized in that: A plurality of side grooves I (11) are provided on the side wall of the expansion sleeve I (2) along its axial direction, and a plurality of side grooves II (15) are provided on the side wall of the expansion sleeve II (3) along its axial direction.

6. The scroll compressor assembly tool according to claim 1, characterized in that: The lower end of the cylindrical surface I (16) of the core shaft (4) is provided with a main bearing support limiting shoulder (21), so that the lower end surface of the main bearing support (5) is close to the main bearing support limiting shoulder (21).

7. The scroll compressor assembly tool according to claim 1, characterized in that: The middle section of the core shaft (4) is provided with two discs, the side walls of the two discs form a cylindrical surface II (18), and the cylindrical surface II (18) matches the inner wall of the inner hole of the motor stator (6).

8. The scroll compressor assembly tool according to claim 7, characterized in that: The lower side of the lower disc protrudes outward to form a stator limiting shoulder (20), and the stator limiting shoulder (20) is matched with the lower end surface of the motor stator (6).

9. The scroll compressor assembly tool according to claim 1, characterized in that: The auxiliary bearing support (8) includes a support seat (801) and a center seat (802), wherein the center seat (802) is fixed at the middle position of the lower side of the support seat (801), and the support seat (801) is placed on the upper end of the tray (9), and the center hole of the center seat (802) is matched with the cylindrical surface III (19).

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