Counterweight balance block, scroll compressor assembly and vehicle-mounted air conditioning system
By setting the counterweight balance block of the arc assembly groove on the motor shaft of the scroll compressor, changing the transmission path, the problems of anti-rotation pin loosening and vibration noise are solved, and the stability and noise effect of the compressor are improved.
Patent Information
- Application Number
- CN202420658427.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-01
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2034-04-01
AI Technical Summary
During the working process of existing scroll compressors, the anti-rotating pins are easily loosened due to changes in support, resulting in poor vibration and noise effects.
A counterweight balance block is designed. By setting an arc assembly groove on the motor shaft, the force transmission part is in contact with the motor shaft, and the chip discharge part is spaced with the motor shaft, changing the transmission path to avoid the anti-rotation pin being caused by alternating external forces. loosen and improve balance.
It effectively avoids the problem of anti-rotating pin loosening, reduces the vibration and noise of the compressor, and improves the stability and service life of the entire machine.
Smart Images
Figure CN222315802U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of compressors, and in particular to a counterweight balancing block, a scroll compressor assembly and a vehicle-mounted air-conditioning system. Background Art
[0002] In the prior art, when the scroll compressor is working, the rotor core rotates under the action of electromagnetic force, and in turn drives the motor shaft, eccentric pin, counterweight and movable scroll assembly to rotate; the movable scroll assembly, restricted by multiple anti-rotation pins, eventually moves in a circular translation around the center of the motor shaft. The volume of the closed working chamber formed by the meshing of the movable scroll assembly and the fixed scroll assembly becomes smaller, and the refrigerant in the closed working chamber is compressed, thereby realizing the function of compressing the refrigerant.
[0003] The inventor has found that the scroll compressor in the prior art has at least the following disadvantages:
[0004] During the operation of the scroll compressor, each anti-rotation pin will be subjected to a supporting force, and the magnitude and direction of each supporting force will change periodically with the change of the driving force direction. Under the action of this force, the anti-rotation pin is in danger of loosening; and for the entire compressor, the supporting force exerted on the anti-rotation pin is an exciting force, which will increase the vibration of the compressor and make the noise reduction effect of the compressor worse. Utility Model Content
[0005] The purpose of the utility model is to provide a counterweight balancing block, a scroll compressor assembly and a vehicle air-conditioning system, which can improve the situation of loosening of the anti-rotation pin and effectively improve the vibration and noise effects of the compressor.
[0006] The embodiment of the utility model is achieved as follows:
[0007] In a first aspect, the utility model provides a counterweight balancing block for cooperating with a motor shaft equipped with an eccentric pin, comprising:
[0008] A boss and a balancing body are connected, the boss is provided with a fixing hole for the eccentric pin to be inserted, and the axis of the fixing hole is spaced apart from the axis of the boss; the balancing body is provided with an assembly groove, the groove wall of the assembly groove is arranged as an arc-shaped assembly surface, and the arc-shaped assembly surface has a force transmission part and a chip removal part; the assembly groove is used for the motor shaft to be inserted, so that the force transmission part contacts the outer peripheral surface of the motor shaft and the chip removal part has a distance from the outer peripheral surface of the motor shaft.
[0009] In an optional embodiment, the arc-shaped assembly surface is set as an arc surface, and the axis perpendicular to the circumference of the arc surface is the target axis, and the target axis is arranged parallel to the preset axis and spaced apart; the preset axis and a reference axis that is perpendicular to both the axis of the fixing hole and the axis of the boss have a set angle α, and the value range of α is 115°-125°, and the preset axis intersects the axis of the boss perpendicularly; when the motor shaft is inserted into the assembly groove, the force transmission portion is tangent to the outer circumferential surface of the motor shaft.
[0010] Based on the above solution, by processing the arc-shaped assembly surface into a circular arc surface, the processing difficulty is reduced, the processing efficiency is improved, and the processing cost is low.
[0011] In an optional embodiment, the force transmission part and the chip removal part are both configured as arc surfaces, the radius of the circle where the force transmission part is located is the same as the radius of the motor shaft, and the radius of the circle where the chip removal part is located is greater than the radius of the motor shaft.
[0012] Based on the above scheme, the force transmission part and the chip removal part are both set as arc surfaces, which increases the contact area between the force transmission part and the outer peripheral surface of the motor shaft, reduces wear, extends the service life, and can improve the stability and reliability of force transmission.
[0013] In an optional embodiment, the boss is provided with a first end face and a second end face opposite to each other, and the balancing body is provided on the first end face; the first end face is provided with a balancing groove, and the fixing hole is provided on the bottom wall of the balancing groove.
[0014] Based on the above scheme, by setting a balancing groove, the axial length of the fixing hole can be reduced. After the eccentric pin is inserted into the fixing hole, the center position of the contact area between the eccentric pin and the fixing hole moves close to the movable scroll assembly, so that it can be closer to the center position of the connection structure between the movable scroll assembly and the balancing body, thereby improving the balance.
[0015] In an optional embodiment, the boss and the balancing body are configured as an integral structure.
[0016] Based on the above scheme, the counterweight balance block has a simple structure, high structural strength, is easy to process in batches, and saves processing and manufacturing costs.
[0017] In an optional embodiment, the balancing body is arranged in a sector shape, and the balancing body is arranged in a central symmetric manner with respect to a plane defined by an axis of the boss and an axis of a circle where the sector shape is located.
[0018] Based on the above solution, the structure of the balancing body is simple and easy to process and manufacture.
[0019] In a second aspect, the utility model provides a scroll compressor assembly, the scroll compressor assembly comprising:
[0020] The counterweight balancing block according to any one of the preceding embodiments.
[0021] In an optional embodiment, the scroll compressor assembly also includes a motor shaft, an eccentric pin, a bearing and a movable scroll assembly, the eccentric pin is fixed on the motor shaft, the motor shaft is inserted into the assembly groove, and the eccentric pin is inserted into the fixing hole; the movable scroll assembly is rotatably mounted on the boss through the bearing; and a plurality of anti-rotation grooves for inserting anti-rotation pins are provided on the base plate of the movable scroll assembly.
[0022] Based on the above solution, the scroll compressor assembly is easy to assemble.
[0023] In an optional implementation, a rotor core is connected to the motor shaft outer shell, and a balancing piece is installed on the rotor core.
[0024] Based on the above scheme, the scroll compressor assembly has high balance, small vibration and low noise during operation.
[0025] In a third aspect, the utility model provides a vehicle air conditioning system, the vehicle air conditioning system comprising:
[0026] A scroll compressor assembly according to any one of the preceding embodiments.
[0027] The beneficial effects of the embodiments of the utility model are:
[0028] In summary, the counterweight balancing block provided in this embodiment is connected to the motor shaft and the movable scroll assembly at the same time. By improving the structure of the assembly groove on the balancing body that matches the outer peripheral surface of the motor shaft, the area where the force transmission part of the assembly groove is located is in contact with the outer peripheral surface of the motor shaft, and the area where the chip removal part is located is spaced apart from the outer peripheral surface of the motor shaft. In this way, the transmission path of the scroll compressor assembly is changed, so that during the steady-state operation of the scroll compressor assembly, there is no supporting force between the movable scroll assembly and the anti-rotation pin. Therefore, the improved transmission structure can effectively avoid the problem of the danger of the anti-rotation pin being loosened due to alternating external forces. For the entire compressor, since there is no exciting force, the vibration and noise effects of the compressor can be effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.
[0030] Figure 1It is a structural schematic diagram of a scroll compressor assembly in the prior art;
[0031] Figure 2 for Figure 1 Schematic cross-sectional view of AA in the figure;
[0032] Figure 3 It is a force analysis diagram of a scroll compressor assembly in the prior art;
[0033] Figure 4 It is a structural schematic diagram of a scroll compressor assembly according to an embodiment of the utility model;
[0034] Figure 5 It is a cross-sectional schematic diagram of a scroll compressor assembly according to an embodiment of the utility model;
[0035] Figure 6 for Figure 5 Schematic cross-sectional view of AA in the figure;
[0036] Figure 7 This is a force analysis diagram of a scroll compressor assembly according to an embodiment of the utility model;
[0037] Figure 8 A schematic diagram of a counterweight balancing block according to an embodiment of the present utility model;
[0038] Fig. 9 The figure is a cross-sectional schematic diagram of a counterweight balancing block according to an embodiment of the present utility model.
[0039] icon:
[0040] 001-orbiting scroll assembly; 002-counterweight balance block; 003-rotor core; 004-motor shaft assembly; 041-motor shaft; 042-eccentric pin; 005-main bearing; 006-secondary bearing; 007-anti-rotation pin; 008-first gap; 009-second gap;
[0041] 100-motor shaft; 200-eccentric pin; 300-first bearing; 400-second bearing; 500-third bearing; 600-rotor core; 700-first balancing block; 800-second balancing block; 900-counterweight balancing block; 910-boss; 911-balancing groove; 912-fixing hole; 920-balancing body; 921-assembly groove; 922-arc-shaped assembly surface; 9221-force transmission part; 9222-chip removal part; 930-target axis; 940-preset axis; 950-reference axis; 960-spacing; 1000-moving scroll assembly. DETAILED DESCRIPTION
[0042] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.
[0043] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0044] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.
[0045] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.
[0046] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0047] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0048] Please combine Figure 1 and Figure 2 In the prior art, the transmission structure of the scroll compressor includes the main parts such as the movable scroll assembly 001, the counterweight balancing block 002, the rotor core 003, the motor shaft assembly 004, the main bearing 005, the auxiliary bearing 006 and a plurality of anti-rotation pins 007; wherein the motor shaft assembly 004 is mainly composed of the motor shaft 041 and the eccentric pin 042. The counterweight balancing block 002 is provided with an arc surface, and there is a first gap 008 between one side of the arc surface and the outer cylindrical surface of the motor shaft 041, and there is a second gap 009 between the other side and the outer cylindrical surface of the motor shaft 041. Except for the anti-rotation pin 007, the main bearing 005 and the auxiliary bearing 006 which are fixed in the compressor and are stationary, the other parts will have relative movement. During the operation of the scroll compressor, the rotor core 003 rotates under the action of electromagnetic force, and drives the motor shaft 041, the eccentric pin 042, the counterweight 002 and the movable scroll assembly 001 to rotate in turn; the movable scroll assembly 001, under the restriction of multiple anti-rotation pins 007, finally makes a circumferential translation around the center of the motor shaft 041, and the counterweight 002 is stabilized at a position with a first gap 008 and a second gap 009 with the motor shaft 041. The volume of the closed working chamber formed by the meshing of the profile between the movable scroll assembly 001 and the fixed scroll assembly becomes smaller, and the refrigerant in the closed working chamber is compressed, thereby realizing the function of compressing the refrigerant.
[0049] Please combine Figure 3 Furthermore, in order to analyze the force during the movement, the number of anti-rotation pins 007 is six as an example, and it is assumed that during the steady-state operation of the compressor, the driving force borne by the movable scroll organization is F, and the point of action is the center point O3 of the movable scroll. This force can be decomposed into a horizontal force Ft and a vertical force Fr; the resultant force of the horizontal force Ft and the refrigerant force Ft on the movable scroll assembly 001 in the horizontal direction is zero, and the vertical force Fr and the refrigerant force Fr on the movable scroll in the vertical direction are zero. 气 , the sum of the supporting forces of the six anti-rotation pins 007 (the sum of Fn1, Fn2, Fn3, Fn4, Fn5 and Fn6), the centrifugal force F of the movable scroll 离1 , the centrifugal force F of the counterweight 002 离2 The net force is zero, that is, Fr = Fr 气 +Fn1+Fn2+Fn3+Fn4+Fn5+Fn6+F 离1 +F 离2 , where Fr is the driving force, Fr 气 , Fn1, Fn2, Fn3, Fn4, Fn5, Fn6, F 离1 and F 离2 All are load.
[0050] Therefore, in the scroll compressor assembly of the prior art, in order to balance the vertical component Fr of the driving force F borne by the movable scroll assembly 001, the six anti-rotation pins 007 respectively bear supporting forces Fn1, Fn2, Fn3, Fn4, Fn5 and Fn6, and the magnitude and direction of the supporting force of each anti-rotation pin 007 will change periodically with the change of the driving force direction. Under the action of this external force, the anti-rotation pin 007 is in danger of loosening; the periodically changing supporting forces Fn1, Fn2, Fn3, Fn4, Fn5 and Fn6 borne by the anti-rotation pin 007 are exciting forces for the entire compressor, which will cause the vibration and noise effects of the compressor to deteriorate.
[0051] In view of this, the designer provides a scroll compressor assembly that can improve the support force of the anti-rotation pin, making the anti-rotation pin less likely to loosen, while also improving the noise reduction effect of the entire machine.
[0052] Please combine Figure 4-Figure 9 In this embodiment, the scroll compressor assembly includes a motor shaft 100, an eccentric pin 200, a first bearing 300, a second bearing 400, a third bearing 500, a rotor core 600, a first balancing block 700, a second balancing block 800, a counterweight balancing block 900 and a movable scroll assembly 1000. The eccentric pin 200 is fixed to the end of the motor shaft 100 and the two can be interference fit. The axis of the eccentric pin 200 is eccentrically arranged with the axis of the motor shaft 100, that is, the axes of the two are parallel and have a spacing of 960. The first bearing 300 and the second bearing 400 are both sleeved on the motor shaft 100 and arranged at intervals, and are used to rotatably install the motor shaft 100 in the casing of the compressor. The rotor core 600 is sleeved outside the motor shaft 100, and the rotor core 600 is located between the first bearing 300 and the second bearing 400. The first balancing block 700 and the second balancing block 800 are respectively installed at both ends of the rotor core 600 in the axial direction of the motor shaft 100. The counterweight 900 is sleeved on the outside of the motor shaft 100, and the eccentric pin 200 is plugged and interference fit with the counterweight 900. The movable scroll assembly 1000 is rotatably matched with the counterweight 900 through the third bearing 500. During the operation of the scroll compressor assembly, the rotor core 600 rotates under the action of electromagnetic force, and drives the motor shaft 100, the eccentric pin 200, the counterweight 900 and the movable scroll assembly 1000 to rotate in turn.
[0053] Please combine Figure 8 and Fig. 9Optionally, the counterweight balancing block 900 includes an integrated boss 910 and a balancing body 920, and the balancing body 920 is located at one end of the boss 910. Specifically, the boss 910 is a cylindrical structure, and the boss 910 has a first end face and a second end face that are relatively arranged in the direction of extension of its axis, and the balancing body 920 is formed on the first end face. A balancing groove 911 is arranged on the first end face, and the balancing groove 911 is a circular groove, and the axis of the balancing groove 911 is colinear with the axis of the boss 910. A circular fixing hole 912 is arranged on the bottom wall of the balancing groove 911, and the fixing hole 912 is a through hole, and one port of the fixing hole 912 is located on the second end face. The fixing hole 912 is eccentrically arranged with respect to the boss 910, that is, the axis of the fixing hole 912 is parallel to the axis of the boss 910 and has a spacing of 960. The balancing body 920 can be set as a fan-shaped structure. Further, the balancing body 920 is centrally symmetrically arranged with respect to a plane determined by the axis of the boss 910 and the axis of the circumference of the fan. The balancing body 920 has a regular structure and is easy to manufacture. An assembly groove 921 is arranged on the inner side of the balancing body 920. The assembly groove 921 is an arc-shaped groove. The groove wall of the assembly groove 921 is arranged as an arc-shaped assembly surface 922. The arc-shaped assembly surface 922 has a force transmission part 9221 and a chip removal part 9222 connected to each other.
[0054] During assembly, the assembly groove 921 is sleeved on the outside of the motor shaft 100, and the eccentric pin 200 on the motor shaft 100 passes through the balance groove 911 and is inserted and fixed in the fixing hole 912. The eccentric pin 200 and the fixing hole 912 can be interference fit. The third bearing 500 is sleeved on the outside of the boss 910, and the movable scroll assembly 1000 is fixed on the outside of the third bearing 500. Due to the design of the balance groove 911, the center of the contact position between the eccentric pin 200 and the fixing hole 912 is translated toward the second end face of the boss 910, and the movable scroll assembly 1000 is installed at the end where the second end face of the boss 910 is located. When the center of the assembly position of the eccentric pin 200 and the fixing hole 912 is translated, it can move closer to the center of the assembly position of the movable scroll assembly 1000 and the balance body 920, thereby improving the balance. Furthermore, during the operation of the scroll compressor assembly, when the scroll compressor assembly is in a stable operating state, the force transmission portion 9221 of the assembly groove 921 contacts the outer peripheral surface of the motor shaft 100, and at the same time, the chip removal portion 9222 of the assembly groove 921 is spaced 960 from the outer peripheral surface of the motor shaft 100. It should be understood that during the assembly process, due to the improvement of the assembly accuracy, the force transmission portion 9221 can be directly contacted with the outer peripheral surface of the motor shaft 100, and at the same time, the chip removal portion 9222 is spaced 960 from the outer peripheral surface of the motor shaft 100.
[0055] It should be noted that after the counterweight balancing block 900 is assembled with the motor shaft 100, there is a gap between the counterweight balancing block 900 and the motor shaft 100, thereby changing the transmission path of the scroll compressor assembly, so that during the steady-state operation of the scroll compressor assembly, there is no supporting force between the movable scroll assembly 1000 and the anti-rotation pin. Therefore, the improved transmission structure can effectively avoid the problem of the anti-rotation pin being loose due to alternating external forces. For the compressor as a whole, since there is no exciting force, the vibration and noise effects of the compressor can be effectively improved.
[0056] Please combine Figure 7 Specifically, during the operation of the scroll compressor assembly, the rotor core 600 rotates under the action of the electromagnetic force, and drives the motor shaft 100, the eccentric pin 200, the counterweight 900 and the movable scroll assembly 1000 to rotate in turn. During the above movement, the counterweight 900 is restricted by the motor shaft 100. When the counterweight 900 and the motor shaft 100 are in a stable state, the counterweight 900 rotates to the position where the force transmission part 9221 contacts the outer peripheral surface of the motor shaft 100. At this time, the position of the movable scroll assembly 1000 installed on the counterweight 900 is uniquely determined, and finally the movable scroll assembly 1000 performs a circumferential translation around the center of the motor shaft 100. The volume of the closed working chamber formed by the meshing of the profile between the movable scroll assembly 1000 and the fixed scroll assembly becomes smaller, and the refrigerant in the closed working chamber is compressed, thereby realizing the function of compressing the refrigerant. During the steady-state operation of the scroll compressor assembly, the driving force on the movable scroll is F, and the point of action is the center point O3 of the movable scroll. This force can be decomposed into horizontal force Ft and vertical force Fr; the horizontal force Ft and the refrigerant force Ft on the movable scroll in the horizontal direction are 气 The resultant force is zero, but the vertical force Fr and the refrigerant force Fr on the moving scroll in the vertical direction are 气 、The centrifugal force F of the moving scroll 离1 , the centrifugal force F of the counterweight 900 离2 The resultant force is not zero, and Fr>Fr 气 +F 离1 +F 离2This causes the counterweight 900 to have a tendency to rotate clockwise around the center point O2 of the eccentric pin 200, and then at the position A where the counterweight 900 contacts the motor shaft 100, the motor shaft 100 generates a supporting force of Fn on the counterweight 900, and just prevents the counterweight 900 from rotating clockwise around the center point O2 of the eccentric pin 200. Therefore, under the force of Fr, the counterweight 900 will not transmit force to the movable scroll assembly 1000, so that there is no supporting force Fn1, Fn2, Fn3, Fn4, Fn5, Fn6 between the movable scroll assembly 1000 and the six anti-rotation pins. Therefore, the scroll compressor assembly provided in this embodiment can effectively avoid the risk of the anti-rotation pin loosening due to alternating external forces. For the compressor as a whole, since there is no exciting forces Fn1, Fn2, Fn3, Fn4, Fn5 and Fn6, the vibration and noise effects of the compressor can be effectively improved.
[0057] It should be noted that after assembly, the center O1 of the motor shaft 100 is located on the axis of the boss 910 .
[0058] It should be understood that due to the presence of the chip removal portion 9222, liquid or other impurities can enter the gap between the chip removal portion 9222 and the motor shaft 100 during the operation of the scroll compressor assembly, and the liquid or impurities can be discharged during the operation of the scroll compressor assembly to avoid damage caused by excessive internal pressure.
[0059] Please combine Fig. 9 In an optional embodiment, the arc-shaped assembly surface 922 is set as an arc surface, and the axis perpendicular to the circumference of the arc surface is the target axis 930, and the target axis 930 is arranged parallel to the preset axis 940. Among them, the preset axis 940 and the reference axis 950 that is perpendicular to the axis of the fixing hole 912 and the axis of the boss 910 have a set angle α, and the value range of α is 115°-125°, and the preset axis 940 intersects the axis of the boss 910 perpendicularly. With such a design, when the motor shaft 100 is inserted into the assembly groove 921, the force transmission part 9221 is tangent to the outer peripheral surface of the motor shaft 100, and the two are in contact at the tangent position. By processing the arc-shaped assembly surface 922 into an arc cotton, the processing difficulty is reduced and the processing cost is reduced.
[0060] For example, the value of α may be 115°, 120°, or 125°.
[0061] Compared with the prior art, the position of the arc-shaped assembly surface 922 provided in this embodiment is translated in the horizontal and vertical directions. The horizontal translation distance is set as required, and the vertical translation distance is consistent with the eccentricity of the movable scroll profile of the movable scroll assembly 1000.
[0062] In another optional embodiment, the force transmission part 9221 and the chip removal part 9222 are both configured as arc surfaces, the radius of the circle where the force transmission part 9221 is located is the same as the radius of the motor shaft 100, and the radius of the circle where the chip removal part 9222 is located is greater than the radius of the motor shaft 100. The force transmission part 9221 and the chip removal part 9222 are both configured as arc surfaces, which increases the contact area between the force transmission part 9221 and the outer peripheral surface of the motor shaft 100, reduces wear, prolongs the service life, and can improve the stability and reliability of force transmission.
[0063] It should be understood that in other embodiments, the structure of the counterweight balancing block 900 can also be set to other shapes, so that part of the counterweight balancing block 900 contacts the outer circumference of the motor shaft 100, and the remaining part has a spacing of 960 from the outer circumference of the motor shaft 100.
[0064] It should be understood that Figure 2 , Figure 3 , Figure 6 and Figure 7 In FIG. 1 , the arrow located at the top indicates the rotation direction of the motor shaft 100 .
[0065] This embodiment also provides a vehicle air-conditioning system, including the scroll compressor assembly provided in the above embodiment.
[0066] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
Claims
1. A counterweight balancing block, used to cooperate with a motor shaft equipped with an eccentric pin, characterized in that: include: A boss and a balancing body are connected, the boss is provided with a fixing hole for the eccentric pin to be inserted, and the axis of the fixing hole is spaced apart from the axis of the boss; the balancing body is provided with an assembly groove, the groove wall of the assembly groove is arranged as an arc-shaped assembly surface, and the arc-shaped assembly surface has a force transmission part and a chip removal part; the assembly groove is used for the motor shaft to be inserted, so that the force transmission part contacts the outer peripheral surface of the motor shaft and the chip removal part has a distance from the outer peripheral surface of the motor shaft.
2. The counterweight balancing block according to claim 1, characterized in that: The arc-shaped assembly surface is set as an arc surface, and the axis perpendicular to the circumference of the arc surface is the target axis, and the target axis is arranged parallel to the preset axis and spaced apart; the preset axis and a reference axis which is perpendicular to both the axis of the fixing hole and the axis of the boss have a set angle α, and the value range of α is 115°-125°, and the preset axis intersects the axis of the boss perpendicularly; when the motor shaft is inserted into the assembly groove, the force transmission portion is tangent to the outer circumference of the motor shaft.
3. The counterweight balancing block according to claim 1, characterized in that: The force transmission part and the chip removal part are both configured as arc surfaces, the radius of the circle where the force transmission part is located is the same as the radius of the motor shaft, and the radius of the circle where the chip removal part is located is greater than the radius of the motor shaft.
4. The counterweight balancing block according to claim 1, characterized in that: The boss is provided with a first end face and a second end face opposite to each other, the balancing body is provided on the first end face; the first end face is provided with a balancing groove, and the fixing hole is provided on the bottom wall of the balancing groove.
5. The counterweight balancing block according to claim 1, characterized in that: The boss and the balancing body are configured as an integrated structure.
6. The counterweight balancing block according to claim 1, characterized in that: The balancing body is arranged in a sector shape, and is arranged in a central symmetric manner with respect to a plane defined by an axis of the boss and an axis of a circle where the sector shape is located.
7. A scroll compressor assembly, characterized in that: The scroll compressor assembly comprises: The counterweight balancing block according to any one of claims 1 to 6.
8. The scroll compressor assembly according to claim 7, characterized in that: The scroll compressor assembly also includes a motor shaft, an eccentric pin, a bearing and a movable scroll assembly, wherein the eccentric pin is fixed to the motor shaft, the motor shaft is inserted into the assembly groove, and the eccentric pin is inserted into the fixing hole; the movable scroll assembly is rotatably mounted on the boss through the bearing; and a plurality of anti-rotation grooves for inserting anti-rotation pins are provided on the base plate of the movable scroll assembly.
9. The scroll compressor assembly according to claim 8, characterized in that: The motor shaft is outer-connected with a rotor core, and a balancing piece is installed on the rotor core.
10. A vehicle air conditioning system, characterized in that: The vehicle air conditioning system comprises: A scroll compressor assembly as claimed in any one of claims 7 to 9.