Automotive air conditioning damper actuator

Abstract

Automotive air conditioning damper actuator, characterized in that it comprises: an actuator housing comprising an upper actuator shell, a lower actuator shell, and a housing cavity formed by the upper and lower actuator shells; an electric motor assembly disposed in the housing cavity, the electric motor assembly comprising an electric motor shell, a rotor rotating shaft, and a rear cover plate, a rear end of the rear cover plate being provided with a projection; an electric motor shell vibration damping pad that is mounted between the rear cover plate and the inner wall of the housing cavity is arranged adjacent thereto, wherein the electric motor shell vibration damping pad comprises an upper half-ring pad and a lower half-ring pad, between which a mounting hole is formed for sliding onto the projection, and wherein the upper half-ring cushion and the lower half-ring cushion are each mounted on the inner wall of the upper and lower half-ring cushions, respectively. mounted on the lower actuator shell so that their positions are restricted.

Description

Technical FieldThe present invention relates to the field of transmission technology for automotive air conditioning flap actuators, and more particularly to an automotive air conditioning flap actuator.Prior ArtWith the innovative development of the automobile industry, particularly with the rapid progress in technologies such as new power sources and autonomous driving, automotive electronic systems have been widely used and have become an essential component of vehicles. Their performance directly affects the drive characteristics, economy, reliability, safety, and comfort of vehicles. The functional principle of an air-conditioning air outlet actuator of a motor vehicle is that a micro-motor rotates at high speed after being energized, its rotational speed is reduced by a gear system, and finally a specific torque and a specific rotational speed are output by an output gear. An associated air flap is then pushed over a connecting rod, as a result of which the functions of opening, closing and angular adjustment of the air flap of the motor vehicle air conditioning system are realized.An air flap of a motor vehicle air conditioning system comprises a stepper motor and a shell. In order to prevent a worm of the stepping motor from rotating relative to the tray, a rotating shaft of the stepping motor is rotatably connected to the tray. However, vibrations of the stepping motor can be easily transmitted to the tray. This problem can be solved by providing a vibration damping pad between the stepping motor and the shell. In the prior art, the vibration damping pad requires a fit with the stepper motor via a protrusion and a groove, which places certain requirements on the structure of the stepper motor. At the same time, the axial compression of the vibration damping pad during the assembly of the stepper motor frequently leads to a displacement of the axial position of the stepper motor.SUMMARY OF THE INVENTIONEmbodiments of the present invention provide an automotive air conditioner louver actuator in which upper and lower half ring pads of an electric motor shell vibration damping pad are mounted in advance on the inner wall of upper and lower actuator shells, respectively, so that their positions are limited. This eliminates a positioning structure between the electric motor shell and the vibration damping pad, which extends the range of application of the electric motor arrangement.According to the present invention, the object is achieved by the following technical solution: a motor vehicle air conditioning flap actuator comprises:an actuator housing comprising an upper actuator shell, a lower actuator shell, and a housing cavity formed by the upper and lower actuator shells;an electric motor assembly disposed in the housing cavity, the electric motor assembly comprising an electric motor shell, a rotor rotation shaft, and a rear cover plate, wherein a rear end of the rear cover plate is provided with a protrusion;an electric motor shell vibration damping pad disposed between the rear cover plate and the inner wall of the housing cavity abutting thereon, wherein the electric motor shell vibration damping pad comprises an upper half ring pad and a lower half ring pad, between which a mounting hole for sliding on the protrusion is formed, and wherein the upper half ring pad and the lower half ring pad are respectively mounted on the inner wall of the upper and lower actuator shells such that their positions are restricted.Compared with the prior art, the present invention is distinguished by the following advantages:By mounting the upper and lower half ring pads of the motor shell vibration damping pad in advance on the inner wall of the upper and lower actuator shells, respectively, so as to limit their positions, when the rear cover plate is connected to the actuator housing via the motor shell vibration damping pad, it is only necessary to ensure that a mounting hole is formed between the upper and lower half ring pads, which is fitted onto the protrusion provided at the rear end of the rear cover plate. This eliminates a positioning structure between the electric motor shell and the vibration damping pad, which extends the range of application of the electric motor arrangement.By dividing the electric motor shell vibration damping cushion into the upper and the lower half ring cushion, the production and machining of the electric motor shell vibration damping cushion is facilitated. At the same time, when the dimension of the projection is changed in the case of replacement of the electric motor arrangement, it is thus only necessary to replace the upper and lower half-ring cushions. Thereby, the mounting hole formed between the upper and lower half ring pads, which is configured to be slid onto the protrusion, can be adjusted to the new dimension of the protrusion, which further extends the range of application of the electric motor assembly.As a further development, it is provided that the inner wall of the upper actuator shell is provided with an upper groove and the inner wall of the lower actuator shell is provided with a lower groove in a manner corresponding to the upper groove, wherein the upper half-ring cushion is arranged in the upper groove and the lower half-ring cushion is arranged in the lower groove. By disposing the upper half ring pad in the upper groove and the lower half ring pad in the lower groove, such mounting of the upper and lower half ring pads that their positions are limited is achieved.As a development, it is provided that the upper groove is provided on a side wall facing the rear cover plate with an upper semicircular hole which is matched in terms of its shape to the upper end of the projection, while the lower groove is provided on a side wall facing the rear cover plate, corresponding to the upper semicircular hole, with a lower semicircular hole which is matched in terms of its shape to the lower end of the projection. The protrusion penetrates the upper semicircular hole and the lower semicircular hole, so that the upper end of the protrusion abuts against the lower end of the upper half ring pad and the lower end of the protrusion abuts against the upper end of the lower half ring pad. The rear end of the rear cover plate abuts against the side wall of the upper and lower grooves facing the rear cover plate. By the rear end of the rear cover plate abutting against the side wall of the upper and lower grooves facing the rear cover plate, the rear end of the rear cover plate is axially delimited by the side wall of the upper and lower grooves facing the rear cover plate. By the protrusion penetrating the upper semicircular hole and the lower semicircular hole so that the upper end of the protrusion abuts against the lower end of the upper half ring pad and the lower end of the protrusion abuts against the upper end of the lower half ring pad, the protrusion is limited in the radial direction by the upper and lower half ring pads. This improves the stability of the electric motor arrangement during its operation.As a development, it is provided that the electric motor arrangement further comprises a first bushing and a leaf-shaped elastic element. The electric motor shell includes a first end and a second end of the electric motor shell. The rotor rotary shaft is rotatably mounted in the electric motor shell, and the first bushing is mounted and mounted at a location of the rotor rotary shaft facing the first end of the electric motor shell. The sheet-shaped elastic element is fastened to the first end of the electric motor shell and matched in terms of its shape to the first end of the electric motor shell. The blade-shaped elastic member exerts an elastic force on the rotor rotation shaft via the first bush. The rear cover plate is disposed at the first end of the electric motor shell and at an outer end of the sheet-shaped elastic member, and integrally fixed to the electric motor shell and the sheet-shaped elastic member. In the center of the protrusion, a mounting through hole is provided into which a rear end of the first bushing is inserted. By additionally providing the blade-shaped elastic member, the blade-shaped elastic member applies an axially upward elastic force to the rotor rotation shaft via the first bush, thereby axially supporting the rotor rotation shaft. As a result, the rotor rotary shaft is reliably supported even in the load-free and non-energized state, which ensures the stability of the rotor rotary shaft during the movement. This further improves the operational stability of the electric motor assembly and optimizes the problem of noises of the entire electric motor assembly.As a development, it is provided that the electric motor arrangement further comprises a second bushing, a worm and a worm holder. The second bushing is supported and mounted on the other end of the rotor rotation shaft. The worm is fixed to an output end of the rotor rotation shaft, and a larger end of the worm holder is fixed to the second end of the electric motor shell, while a smaller end of the worm holder is mounted thereon by sliding on the outer periphery of the second bushing and is defined by the second bushing. By fixing the larger end of the screw holder to the second end of the electric motor shell and mounting the smaller end of the screw holder thereon by sliding on the outer periphery of the second bushing, the stability of the screw during rotation thereof is increased.As a development, it is provided that the actuator further comprises a worm vibration damping cushion, in the middle of which a limiting through hole is provided. A tip end of the second bush is mounted in the worm vibration damping pad so that the side wall of the restriction through hole abuts against the side wall of the tip end of the second bush. The front end surface of the scroll holder abuts against the rear end surface of the scroll vibration damping pad. By the side wall of the restriction through hole abutting against the side wall of the tip end of the second sleeve and the front end surface of the scroll holder abutting against the rear end surface of the scroll vibration damping pad, the second sleeve is subjected to a radial force and the scroll holder is subjected to an axial force, which further improves the stability of the scroll as it rotates.As a further development, it is provided that the inner wall of the upper actuator shell is provided with a delimiting block and the inner wall of the lower actuator shell is provided with a recess corresponding to the delimiting block. The worm vibration damping pad is disposed in the recess. At the same time, the upper end of the worm vibration damping pad abuts against the lower end of the restriction block. By disposing the worm vibration damping pad in the recess and at the same time abutting the upper end of the worm vibration damping pad against the lower end of the restriction block, the worm vibration damping pad is mounted so that its position is restricted.As a further development, it is provided that the outer wall of the lower actuator shell is provided with a plurality of latching blocks and the outer wall of the upper actuator shell is provided with a plurality of latching grooves corresponding to the latching blocks. The latching blocks and the latching grooves latch together. By the upper actuator shell and the lower actuator shell being latched together via the plurality of latching blocks and latching grooves, a connection and fastening of the upper and the lower actuator shell to one another is achieved and at the same time the assembly and disassembly are facilitated.Brief Description of the FiguresThe present invention will be described in more detail below with reference to the drawings and the specific embodiments. Shown therein are: FIG. 1 is an exploded structural view of an automotive air conditioning louver actuator; FIG. 2 is a schematic diagram showing the internal structure of the automotive air conditioner louver actuator with the upper shell removed; FIG. 3 is a schematic structural view of an electric motor shell vibration damping pad; FIG. 4 is a schematic structural sectional view of an electric motor assembly; FIG. 5 is a schematic structural view of a sheet-shaped elastic member; FIG. 6 is a schematic structural view of a lower shell; FIG. 7 is a schematic structural view of the upper shell; FIG. 8 is a schematic structural view showing the cooperation of the upper shell and the lower shell.Description of the reference symbols: 1. upper actuator shell; 1.1. upper groove; 1.1.1. upper semicircular hole; 1.2. Boundary block; 1.3. Latching groove; 2. lower actuator shell; 2.1. lower groove; 2.1.1. lower semicircular hole; 2.2. Recess; 2.3. Detent block; 3rd housing cavity; 4th electric motor shell; 5th rotor rotation shaft; 6th rear cover plate; 6.1. Projection; 6.1.1. Mounting through hole; 7. first bushing; 8. sheet-shaped elastic member; 8.1. central mounting hole; 8.2 slit; 8.3 spring sheet mounting and positioning hole; 9. second bushing; 10. worm; 11. worm holder; 12. electric motor shell vibration damping pad; 12.1 upper half ring pad; 12.2 lower half ring pad; 12.3 mounting hole; 13. worm vibration damping pad; 13.1 restriction through hole.Detailed Description of EmbodimentsIt is understood in the present invention that the terms "length", "width", "top", "bottom", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "plane direction", "circumferential direction", etc. are used with reference to the illustrated directional or positional relationship in the respective drawings, respectively, to describe only the invention and facilitate the description, as appropriate. In other words, these terms are used to indicate neither the positioning nor the explicit positioning, and the configuration and operation of the device or element in question in a predetermined positioning, and therefore there is no restriction of the present utility model here.As shown in FIGS. 1-3, an automotive air conditioner louver actuator includes an actuator housing, an electric motor assembly, and an electric motor shell vibration damping pad 12. The electric motor assembly comprises an electric motor shell 4, a rotor rotation shaft 5 and a rear cover plate 6. The electric motor shell vibration damping pad 12 is disposed between the rear cover plate 6 and the inner wall of the housing cavity 3 in abutment therewith. The electric motor shell vibration damping cushion 12 comprises an upper half ring cushion 12.1 and a lower half ring cushion 12.2, between which a mounting hole 12.3 is formed for sliding onto the projection 6.1. The upper half ring pad 12.1 and the lower half ring pad 12.2 are mounted on the inner wall of the upper actuator shell 1 and the lower actuator shell 2, respectively, in such a manner that their positions are restricted.The actuator further comprises a worm vibration damping pad 13 at the center of which a restriction through hole 13.1 is provided. A tip end of the second bush 9 is mounted in the worm vibration damping pad 13 so that the side wall of the restriction through hole 13.1 abuts against the side wall of the tip end of the second bush 9. The front end surface of the worm holder 11 abuts against the rear end surface of the worm vibration damping pad 13.As shown in FIG. 4, the electric motor assembly further includes a first bushing 7 and a leaf-shaped elastic member 8, and the electric motor shell 4 includes a first end and a second end of the electric motor shell 4. The first bushing 7 is mounted and mounted on a location of the rotor rotary shaft 5 facing the first end of the electric motor shell 4. The sheet-shaped elastic element 8 is fastened to the first end of the electric motor shell 4 and matched in terms of its shape to the first end of the electric motor shell 4. The blade-shaped elastic member 8 applies an elastic force to the rotor rotation shaft 5 via the first bush 7. The rear cover plate 6 is disposed at the first end of the electric motor shell 4 and at an outer end of the sheet-shaped elastic member 8, and is integrally fixed to the electric motor shell 4 and the sheet-shaped elastic member 8. At the center of the protrusion 6.1, a mounting through hole 6.1.1 into which a rear end of the first bushing 7 is inserted is provided.The electric motor assembly further includes a second bushing 9, a worm 10, and a worm holder 11. The worm 10 is fixed to an output end of the rotor rotation shaft 5, and a larger end of the worm holder 11 is fixed to the second end of the electric motor shell 4, while a smaller end of the worm holder 11 is mounted thereon by sliding on the outer periphery of the second sleeve 9 and is restricted by the second sleeve 9.As shown in Fig. 5, the sheet-shaped elastic member 8 comprises a central mounting hole 8.1 for fitting with the first bush 7, a plurality of slits 8.2 extending uniformly outward from the periphery of the central mounting hole 8.1, and spring sheet mounting and positioning holes 8.3 disposed near the ends of the respective slits 8.2 and offset from the respective slits 8.2. The slots 8.2 are not formed in a radially continuous manner. At the first end of the electric motor shell 4, a plurality of mounting and positioning recesses are provided which are associated with the spring blade mounting and positioning holes 8.3, and in the rear cover plate 6, a plurality of rear cover mounting and positioning holes are provided which are associated with the spring blade mounting and positioning holes 8.3.The sheet-shaped elastic member 8 is formed in a circular shape, and the length of the slits 8.2 is 2 / 3 of the radius of the sheet-shaped elastic member 8, and the width of the slits 8.2 is 0.3 to 0.5 mm.As can be seen from FIGS. 6 to 7, the inner wall of the upper actuator shell 1 is provided with an upper groove 1.1 and the inner wall of the lower actuator shell 2 is provided with a lower groove 2.1 corresponding to the upper groove 1.1. The upper half-ring cushion 12.1 is arranged in the upper groove 1.1 and the lower half-ring cushion 12.2 is arranged in the lower groove 2.1.The upper groove 1.1 is provided on a side wall facing the rear cover plate 6 with an upper semicircular hole 1.1.1, which is matched in terms of its shape to the upper end of the projection 6.1, while the lower groove 2.1 is provided on a side wall facing the rear cover plate 6 corresponding to the upper semicircular hole 1.1.1 with a lower semicircular hole 2.1.1, which is matched in terms of its shape to the lower end of the projection 6.1. The projection 6.1 penetrates the upper semicircular hole 1.1.1 and the lower semicircular hole 2.1.1, so that the upper end of the projection 6.1 abuts against the lower end of the upper half-ring cushion 12.1 and the lower end of the projection 6.1 abuts against the upper end of the lower half-ring cushion 12.2. The rear end of the rear cover plate 6 abuts against the side wall of the upper groove 1.1 or the lower groove 2.1 facing the rear cover plate 6.The inner wall of the upper actuator shell 1 is provided with a delimiting block 1.2 and the inner wall of the lower actuator shell 2 is provided with a recess 2.2 corresponding to the delimiting block 1.2. The worm vibration damping pad 13 is arranged in the recess 2.2. At the same time, the upper end of the worm vibration damping pad 13 abuts against the lower end of the restriction block 1.2.As shown in FIG. 8, the outer wall of the lower actuator shell 2 is provided with a plurality of latching blocks 2.3, and the outer wall of the upper actuator shell 1 is provided with a plurality of latching grooves 1.3 corresponding to the latching blocks 2.3. The latching blocks 2.3 and the latching grooves 1.3 latch together.The upper half-ring cushion 12.1 is placed in the upper groove 1.1. The lower half-ring cushion 12.2 is placed in the lower groove 2.1. The worm vibration damping pad 13 is placed in the recess 2.2. The projection 6.1 penetrates the lower semicircular hole 2.1.1, so that the lower end of the projection 6.1 abuts against the upper end of the lower half-ring cushion 12.2. The rear end of the rear cover plate 6 abuts against the side wall of the lower groove 2.1 facing the rear cover plate 6. The tip end of the second bush 9 is mounted inside the worm vibration damping pad 13 so that the side wall of the restriction through hole 13.1 abuts against the side wall of the tip end of the second bush 9. The front end surface of the worm holder 11 abuts against the rear end surface of the worm vibration damping pad 13. Finally, when mounting the upper actuator shell 1, the lower end of the restriction block 1.2 is brought into abutment with the upper end of the worm vibration damping pad 13. The projection 6.1 penetrates the upper semicircular hole 1.1.1, so that the upper end of the projection 6.1 abuts against the lower end of the upper half ring cushion 12.1. The rear end of the rear cover plate 6 abuts against the side wall of the upper groove 1.1 facing the rear cover plate 6. Finally, the latching blocks 2.3 latch together in the latching grooves 1.3.Heretofore, the present invention has been described by way of example with reference to the drawings. Obviously, the concrete realization of the present invention is not subject to any limitation by the above description. Various insubstantial improvements made by the technical solutions of the present invention or applications of the basic ideas and the technical solutions of the present invention without improvement directly in other scenarios are within the scope of the present invention.

Claims

An automotive air conditioner louver actuator, characterized by comprising: an actuator housing comprising an actuator upper shell, an actuator lower shell, and a housing cavity formed by the actuator upper and lower shells; an electric motor assembly disposed in the housing cavity, the electric motor assembly comprising an electric motor shell, a rotor rotation shaft, and a rear cover plate, wherein a rear end of the rear cover plate is provided with a protrusion; an electric motor shell vibration damping pad disposed between the rear cover plate and the inner wall of the housing cavity abutting thereon, wherein the electric motor shell vibration damping pad comprises an upper half ring pad and a lower half ring pad, between which a mounting hole for sliding on the protrusion is formed, and wherein the upper half ring pad and the lower half ring pad are respectively mounted on the inner wall of the upper and lower actuator shells such that their positions are restricted.The automotive air conditioner louver actuator according to claim 1, characterized in that the inner wall of the upper actuator shell is provided with an upper groove and the inner wall of the lower actuator shell is provided with a lower groove, respectively, of the upper half ring pad is disposed in the upper groove and the lower half ring pad is disposed in the lower groove.The automotive air conditioner louver actuator according to claim 2, characterized in that the upper groove is provided on a rear cover plate side wall with an upper semicircular hole matched in shape to the upper end of the protrusion, while the lower groove is provided on a rear cover plate side wall corresponding to the upper semicircular hole with a lower semicircular hole matched in shape to the lower end of the protrusion, the protrusion penetrating the upper semicircular hole and the lower semicircular hole such that the upper end of the protrusion abuts against the lower end of the upper half ring pad and the lower end of the protrusion abuts against the upper end of the lower half ring pad, and the rear end of the rear cover plate abuts against the rear cover plate side wall of the upper and lower grooves, respectively.The automotive air conditioner louver actuator according to claim 1, characterized in that the electric motor assembly further comprises a first bushing and a blade-shaped elastic member, the electric motor shell comprising a first end and a second end of the electric motor shell, the rotor rotation shaft being rotatably mounted in the electric motor shell, and the first bushing being supported and mounted at a location of the rotor rotation shaft facing the first end of the electric motor shell, the blade-shaped elastic member being fixed to the first end of the electric motor shell and matched in shape to the first end of the electric motor shell, the blade-shaped elastic member applying an elastic force to the rotor rotation shaft via the first bushing, wherein the rear cover plate is disposed at the first end of the electric motor shell and at an outer end of the sheet-shaped elastic member and integrally fixed to the electric motor shell and the sheet-shaped elastic member, and wherein a mounting through hole is provided in the center of the protrusion, into which a rear end of the first bush is inserted.The automotive air conditioner louver actuator according to claim 4, characterized in that the electric motor assembly further comprises a second bushing, a scroll and a scroll holder, the second bushing being supported and mounted on the other end of the rotor rotation shaft, the scroll being fixed to an output end of the rotor rotation shaft, and a larger end of the scroll holder being fixed to the second end of the electric motor shell, while a smaller end of the scroll holder is mounted thereon by sliding on the outer periphery of the second bushing and is restricted by the second bushing.The automotive air conditioner louver actuator according to claim 5, characterized in that the actuator further comprises a scroll vibration damping pad having a restriction through hole provided at the center thereof, wherein a tip end of the second bush is mounted in the scroll vibration damping pad such that the side wall of the restriction through hole abuts against the side wall of the tip end of the second bush, and wherein the front end surface of the scroll holder abuts against the rear end surface of the scroll vibration damping pad.The automotive air conditioner damper actuator according to claim 6, characterized in that the inner wall of the upper actuator shell is provided with a restriction block and the inner wall of the lower actuator shell is provided with a recess corresponding to the restriction block, wherein the scroll vibration damping pad is disposed in the recess, and at the same time, the upper end of the scroll vibration damping pad abuts against the lower end of the restriction block.Motor vehicle air-conditioning flap actuator according to Claim 1, characterized in that the outer wall of the lower actuator shell is provided with a plurality of latching blocks, and the outer wall of the upper actuator shell is provided with a plurality of latching grooves corresponding to the latching blocks, the latching blocks and the latching grooves latching together.

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