CN220923760U - Automotive air conditioning system and actuating assembly thereof - Google Patents

Abstract

The utility model discloses an automobile air conditioning system and an actuating assembly thereof, wherein the actuating assembly comprises a motor, a driving piece and a transmission unit arranged between the motor and the driving piece, the motor comprises an output shaft, the transmission unit comprises a worm, and the worm is sleeved on the output shaft of the motor; the output shaft is fixedly provided with a first gasket and a second gasket, the first gasket and the second gasket are respectively positioned on two axial sides of the worm, the worm is limited in the axial direction, looseness of the worm due to thermal expansion and other reasons is avoided, the worm can be ensured to be transmitted between the motor and the driving piece, and safe operation of the actuating assembly and the whole air conditioning system is ensured.

Description

Automotive air conditioning system and actuating assembly thereof

Technical Field

The utility model relates to the technical field of automobiles, in particular to an automobile air conditioning system and an actuating assembly thereof.

Background

Along with the continuous improvement of living standard, the automobile becomes one of the most commonly used riding tools for people to travel daily. The air conditioning system is used as a standard of an automobile, and the comfort of drivers and passengers is directly affected.

In the prior art, a transmission element, such as a worm, a gear and the like, is generally arranged between an actuator of an automobile air conditioning system and a device to be driven, such as a damper, so as to meet the requirement of power deceleration torque conversion transmission. However, in the actual use process, particularly in a high-temperature environment, the worm is easy to loosen due to thermal expansion and the like, so that the position of the worm is offset, and the worm is misplaced with a component matched with the worm, thereby affecting the operation of the whole air conditioning system.

Disclosure of Invention

In view of the above, an actuating assembly capable of limiting a worm and an automobile air conditioning system using the actuating assembly are provided.

In one aspect, the utility model provides an actuating assembly, which is applied to an automobile air conditioning system, wherein the actuating assembly comprises a motor, a driving piece and a transmission unit arranged between the motor and the driving piece, the motor comprises an output shaft, the transmission unit comprises a worm, and the worm is sleeved on the output shaft of the motor; the output shaft is fixedly provided with a first gasket and a second gasket, and the first gasket and the second gasket are respectively positioned on two axial sides of the worm and limit the worm in the axial direction.

In some embodiments, the first and second shims are secured in a tight fit with the output shaft of the motor.

In some embodiments, one of the first and second shims axially abuts the worm, and the other of the first and second shims is axially clearance fit with the worm.

In some embodiments, the second washer is proximate to a distal end of the output shaft relative to the first washer, the first washer axially abutting the worm, the second washer axially clearance-fitting with the worm.

In some embodiments, the first gasket, the second gasket, and the output shaft of the motor each have a coefficient of thermal expansion that is less than a coefficient of thermal expansion of the worm.

In some embodiments, the first and second gaskets are metal gaskets.

In some embodiments, the first and second gaskets are copper alloy gaskets, the output shaft of the motor is a stainless steel shaft lever, and the worm is a resin worm.

In some embodiments, the transmission unit further comprises one or more gears disposed between the worm and the driver.

In some embodiments, the motor, the driving member, and the transmission unit are mounted in a housing that is open at a location corresponding to the driving member.

In another aspect, the present utility model provides an automotive air conditioning system comprising the above-described actuation assembly.

Compared with the prior art, the actuating assembly provided by the utility model has the advantages that the first gasket and the second gasket are respectively arranged at the two ends of the worm to limit the worm in the axial direction, so that the worm is prevented from loosening due to thermal expansion and the like, the worm is ensured to be capable of being transmitted between the motor and the driving piece, and the safe operation of the actuating assembly and the whole air conditioning system is ensured.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions of the prior art, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it will be obvious that the drawings in the following description are some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art.

Fig. 1 is a schematic structural view of an actuating assembly of an air conditioning system for a vehicle according to an embodiment of the present utility model.

Fig. 2 is an exploded view of the actuation assembly shown in fig. 1.

Fig. 3 is a top view of the actuation assembly shown in fig. 1.

Fig. 4 is a cross-sectional view of fig. 3 taken along line IV-IV.

FIG. 5 is a schematic view of the internal structure of the actuator assembly of FIG. 1.

Reference numerals illustrate:

100. An actuation assembly; 20. a housing; 20a, a housing; 20b, a cover body; 22. an opening; 30. a motor; 32. an output shaft; 34. a first gasket; 36. a second gasket; 40. a driving member; 42. a connection hole; 52. a worm; 54/54a/54b/54c, gears; 60. a connector; 62. a connector housing; 64. a connection terminal; 70. a circuit board.

Detailed Description

In order that the utility model may be readily understood, a more complete description of the utility model will be rendered by reference to the appended drawings. One or more embodiments of the present utility model are illustrated in the accompanying drawings to provide a more accurate and thorough understanding of the disclosed subject matter. It should be understood, however, that the utility model may be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein.

The same or similar reference numbers in the drawings correspond to the same or similar components; in the description of the present utility model, it should be understood that, if there is an azimuth or positional relationship indicated by terms such as "upper", "lower", "left", "right", etc., based on the azimuth or positional relationship shown in the drawings, it is only for convenience of describing the present utility model and simplifying the description, but it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus terms describing the positional relationship in the drawings are merely illustrative and should not be construed as limiting the present utility model, and specific meanings of the terms described above may be understood by those of ordinary skill in the art according to specific circumstances.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, if "and/or" and/or "are used throughout, the meaning includes three parallel schemes, for example," a and/or B "including a scheme, or B scheme, or a scheme where a and B are satisfied simultaneously.

In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

The present utility model relates to automotive air conditioning systems, and more particularly to an actuation assembly for an automotive air conditioning system. Fig. 1-2 are schematic diagrams of an embodiment of an actuating assembly of an air conditioning system according to the present utility model, wherein the actuating assembly 100 includes a housing 20, and a motor 30, a driving member 40, a transmission unit, etc. disposed within the housing 20. The driving member 40 is used for connecting an external load, and the rotation of the motor 30 drives the driving member 40 to rotate at a proper speed after being decelerated and changed by the transmission unit, so as to drive the load to operate.

As shown in fig. 2, the housing 20 includes a case 20a and a cover 20b connected to the case 20 a. The housing 20a and the cover 20b are preferably assembled together after being individually molded, respectively, to facilitate assembly of internal components such as the motor 30, the driving member 40, the transmission unit, and the like. After the motor 30, the driving member 40, the transmission unit, etc. are mounted on the corresponding positions of the housing 20a, the cover 20b is covered on the housing 20a, and the two are preferably connected in a sealing manner, such as by welding, so that the sealing effect of the whole actuating assembly 100 is improved, and moisture, dust, etc. in the external environment are prevented from entering the internal space of the housing 20 through the contact interface between the housing 20a and the cover 20b, and the use safety of internal electronic devices is affected. In some application scenarios with low requirements for waterproof performance, the cover 20b and the housing 20a may be connected by a snap connection, a screw connection, or the like.

The motor 30 is fixed to the housing 20, and may be a brushless direct current motor (BLDC), a brushless direct current motor (BDC), or the like. The motor 30 includes an output shaft 32. The output shaft 32 is preferably made of a metallic material, such as stainless steel. The transmission unit is disposed between the motor 30 and the driving member 40, and includes a worm 52. The worm 52 is preferably made of a material such as resin and is fitted over the output shaft 32 of the motor 30 to rotate with the output shaft 32. The aperture of the worm 52 is designed to be slightly smaller than the diameter of the output shaft 32, and in a normal state, the worm 52 is tightly fixed on the output shaft 32, and the worm 52 and the output shaft can synchronously rotate. In high temperature environments, the thermal expansion of the worm 52 is typically greater than the thermal expansion of the output shaft 32, such that the worm 52 may loosen relative to the output shaft 32.

In this embodiment, the output shaft 32 of the motor 30 is further sleeved with a first gasket 34 and a second gasket 36, and the thermal expansion coefficients of the first gasket 34, the second gasket 36 and the output shaft 32 are smaller than the thermal expansion coefficient of the worm 52. Preferably, the first and second shims 34, 36 are metal shims that do not substantially expand when heated. Preferably, the first and second shims 34, 36 are made of an alloy material, such as a copper alloy, having a similar coefficient of thermal expansion to the output shaft 32, and expand or contract simultaneously throughout use, such that the first and second shims 34, 36 are held in close fit engagement with the output shaft 32 at all times. The first gasket 34 and the second gasket 36 are respectively located at two axial sides of the worm 52, and limit the worm 52 in the axial direction, so that the position of the worm 52 is prevented from being shifted at high temperature, and the normal operation of the actuating assembly 100 is prevented from being influenced.

Preferably, as shown in fig. 3-4, one of the shims (e.g., first shim 34) is axially abutted against worm 52, and the other shim (e.g., second shim 36) is axially clearance-fitted against worm 52, with a small gap therebetween having a width corresponding to the cumulative tolerance of the various components assembled, to avoid shifting or even cracking of worm 52 as second shim 36 contacts worm 52 when crimped to output shaft 32. In addition, the interval may be adapted to the deformed dimension of the worm 52 when the worm 52 is deformed at high temperature. In one embodiment, the apertures of the first and second gaskets 34, 36 are designed to be Φ 1.980/-0.02, the design diameter of the output shaft 32 of the motor 30 is Φ2.0/-0.003, and the first and second gaskets 34, 36 are directly press-fitted on the output shaft 32 after molding.

As shown in fig. 2 and 5, the transmission unit further includes a plurality of gears 54 that are engaged stepwise, and in the illustrated embodiment, the number of gears 54 is 3, and hereinafter, primary gears 54a, intermediate gears 54b, and final gears 54c, respectively. Each gear 54a, 54b, 54c comprises a large gear and a small gear axially connected in series, wherein the large gear of the primary gear 54a meshes with the worm 52 and the small gear meshes with the large gear of the intermediate gear 54 b; the pinion gear of the intermediate gear 54b meshes with the bull gear of the final gear 54 c; the pinion of the final gear 54c meshes with the driver 40, or the pinion of the final gear 54c itself serves as the driver 40. By the reduction transmission of the multi-stage gears 54a, 54b, 54c, the driving member 40 can be rotated at a proper speed, thereby rotating the load.

The arrangement of the transmission unit can realize the speed and torque reduction transmission of power and the change of the power transmission direction, and facilitates the arrangement of elements in the shell 20, so that the whole structure is more compact. In other embodiments, the number of gears 54 may be single or greater, and the specific number may be determined according to transmission requirements, installation space, etc., and is not limited to a specific embodiment. Additionally, in some embodiments, the worm 52 may also directly engage the drive member 40, in which case the gear 54 may be omitted. In this embodiment, the driving member 40 itself constitutes a pinion of the final gear 54c, and the center of the cover 20b is provided with the opening 22 at a position facing the driving member 40 so that the driving member 40 is exposed to be connectable to an external load (not shown).

As shown in fig. 2, the driving member 40 is constructed in an internal gear structure, a connection hole 42 is formed at the center thereof, and a part connected to a load is inserted into the connection hole 42 and engaged with it for transmission. In some embodiments, the driver 40 may extend a length out of the housing 20a through the opening 22. At this time, the component for connecting the load with the driving member 40 may be inserted into the connecting hole 42 of the driving member 40, or may be sleeved outside the driving member 40. It should be appreciated that the load and the driver 40 may be directly connected; alternatively, the load may be indirectly connected to the driving member 40 via a transmission element, in particular depending on the mounting position of the load, etc.

Referring to fig. 2 and 5, the housing 20 is further provided with a connector 60, and the connector 60 includes a connector housing 62 and a plurality of connection terminals 64 disposed in the connector housing 62, wherein the connector housing 62 is preferably integrally formed with the housing 20 a. In this embodiment, a circuit board 70 is further disposed in the housing 20, and a sensor may be disposed on the circuit board 70 to detect the position of the driving member 40 in real time, so as to control the operation of the motor 30. Part of the connecting terminals 64 of the connector 60 are inserted into slots of the circuit board 70, fixedly connected by welding and the like and electrically conducted; part of the connection terminals 64 form a plug-in connection with corresponding terminals of the motor 30, and as a whole constitute an electrical control part of the motor 30.

In one particular application, the actuator assembly 100 of the present utility model may be used as an actuator for an automotive air conditioning system, where the driver 40 may be coupled to a damper or the like of the air conditioning system to control the flow of air to or through an area for air conditioning. In operation, the motor 30 rotates the damper via the driving member 40 to regulate the air flow, and air is supplied to the driver and passengers in the vehicle. Because the actuating assembly 100 of the utility model is provided with the first gasket 34 and the second gasket 36 at the two ends of the worm 52 respectively to limit the worm 52 in the axial direction, the looseness of the worm 52 caused by thermal expansion and the like is avoided, the worm 52 can be ensured to be transmitted between the motor 30 and the driving piece 40, and the safe operation of the actuating assembly 100 and the whole air conditioning system is ensured.

It should be noted that the above examples merely represent preferred embodiments of the present utility model, and the description thereof is more specific and detailed, but should not be construed as limiting the utility model. It should be noted that it will be apparent to those skilled in the art that modifications and improvements can be made without departing from the spirit of the utility model, such as combining different features of the various embodiments, which are all within the scope of the utility model.

Claims (10)

1. The actuating assembly is applied to an automobile air conditioning system and is characterized by comprising a motor, a driving piece and a transmission unit arranged between the motor and the driving piece, wherein the motor comprises an output shaft, the transmission unit comprises a worm, and the worm is sleeved on the output shaft of the motor; the output shaft is fixedly provided with a first gasket and a second gasket, and the first gasket and the second gasket are respectively positioned on two axial sides of the worm and limit the worm in the axial direction.

2. The actuator assembly of claim 1, wherein the first and second shims are secured in a tight fit with an output shaft of the motor.

3. The actuator assembly of claim 1, wherein one of the first and second shims axially abuts the worm, and the other of the first and second shims is axially clearance fit with the worm.

4. The actuator assembly of claim 3, wherein the second washer is adjacent an end of the output shaft relative to the first washer, the first washer axially abutting the worm, the second washer axially clearance-fitting with the worm.

5. The actuator assembly of claim 1, wherein the first gasket, the second gasket, and the output shaft of the motor each have a coefficient of thermal expansion that is less than a coefficient of thermal expansion of the worm.

6. The actuator assembly of claim 5, wherein the first and second shims are metal shims.

7. The actuator assembly of claim 5, wherein the first and second shims are copper alloy shims, the output shaft of the motor is a stainless steel shaft, and the worm is a resin worm.

8. The actuation assembly of claim 1 wherein said transmission unit further comprises one or more gears disposed between said worm and said driver.

9. The actuator assembly of any one of claims 1-8, further comprising a housing mounting the motor, drive member, and transmission unit, the housing opening at a location corresponding to the drive member.

10. An automotive air conditioning system comprising the actuation assembly of any of claims 1-9.