Automobile air conditioning mode damper drive mechanism and heater housing

Abstract

The present invention discloses an automotive air conditioning mode damper drive mechanism and heater housing, both within the automotive accessories field. The mechanism comprises a dial having three track grooves, each of which is movably provided with a lever member. The lever members are respectively connected to the rotating shafts of the face damper, foot damper, and defrost damper. The lever member comprises a rod body, a mounting frame disposed at the end of the rod body, and a plurality of rolling elements disposed on the outer ring of the mounting frame. All rolling elements are evenly distributed along a common circumference, and the diameter of the circumference of all rolling elements is equal to the width of the track groove. The lever member, through the rolling elements, is in rolling contact with the groove walls on both sides of the track groove. In this drive mechanism, the lever member and the track groove utilize a fully matched rolling contact method, which significantly improves the guiding accuracy of the track groove, thereby ensuring the accuracy of the angle control of each mode damper, while also avoiding problems such as jamming, groove wall wear, and abnormal noise.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile accessories, and in particular to an automobile air-conditioning mode damper driving mechanism and a heater housing. Background Art

[0002] The modes of automobile air-conditioning systems are formed by the three dampers of face blowing, defrosting and foot blowing acting in different air ducts to form ventilation, semi-ventilation and wind-blocking states, so that the entire air distribution system can form five different modes: face blowing, face blowing / foot blowing, foot blowing, foot blowing / defrosting, and defrosting. The conversion between different modes requires the use of a mode damper driving mechanism. For example, the Chinese patent document with the announcement number CN103017310B introduces an automobile air-conditioning mode damper control mechanism, which synchronously controls the rotation of the face blowing damper, foot blowing damper and defrosting damper by providing a mode damper dial with three track grooves of different shapes, as well as a transmission structure such as a lever and a connecting rod, thereby realizing the conversion of the air-conditioning mode. This type of driving mechanism has the advantages of simple transmission process and compact structure, and has gradually become an optional accessory for air conditioners of most automobile brands on the market.

[0003] However, this type of drive mechanism has the following defects: (1) Its curved track groove plays a guiding role, driving the lever to rotate when the dial rotates. The width of the track groove needs to be wider than the diameter of the lever so that the lever can slide smoothly after being inserted into the track groove. However, this will cause the guiding accuracy of the track groove to become lower, and thus the angle accuracy of the air door rotation will be reduced. If the width of the track groove is set to completely match the lever, it will cause greater resistance when the lever slides, which is prone to problems such as jamming, groove wall wear, and abnormal noise; (2) A dial is used for unified drive. When one air door jams, the other air doors cannot continue to drive. When the air door jams, the motor continues to drive the dial to rotate, which may cause damage to the jammed air door, or damage to the transmission structure such as the lever and connecting rod, causing further losses. Summary of the Invention

[0004] The purpose of the present invention is to provide an automobile air conditioning mode damper drive mechanism and a heater housing, which solves the defects of the existing automobile air conditioning mode damper, such as low angle control accuracy, easy jamming, track groove wear, abnormal noise, and large losses in the event of failure.

[0005] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0006] A vehicle air conditioning mode damper drive mechanism includes a dial having three track grooves formed thereon. A lever is movably provided in each of the track grooves. The lever is respectively connected to the rotating shafts of a face damper, a foot damper, and a defrost damper through transmission. The lever includes a rod body, a mounting frame provided at an end of the rod body, and a plurality of rolling bodies provided on an outer ring of the mounting frame. All the rolling bodies are evenly distributed along the same circumference, and the diameter of the circumference on which all the rolling bodies are located is equal to the width of the track groove. The lever is in rolling contact with the groove walls on both sides of the track groove through the rolling bodies.

[0007] A further improvement is that the shifting lever also includes a cam, and the rod bodies are all installed at the protruding position of the cam.

[0008] A further improvement is that the rotating shaft of the foot-blowing damper is connected to the side position of the corresponding cam through two connecting rods, and the rotating shafts of the face-blowing damper and the defrost damper are coaxially connected to the wheel center position of the corresponding cam.

[0009] A further improvement is that an elastic ring is provided on the outside of the installation frame, the rolling body is provided on the outer wall of the elastic ring, and the inner wall of the elastic ring is provided with a plurality of push rods corresponding to the positions of the rolling bodies, and the push rods move inwardly and penetrate the installation frame.

[0010] A further improvement is that a mounting slot is provided at the protruding position of the cam, the rod body is movably arranged in the mounting slot, a tension spring connected to the end of the rod body is provided in the mounting slot, a cavity is provided in the rod body, a fixing pin is provided in the cavity, the fixing pin extends outward from the rod body wall and is engaged in the notch position of the mounting slot to prevent the rod body from moving into the mounting slot, a plurality of gears are provided inside the mounting frame, the gears are meshed with the side walls of the push rod in a one-to-one correspondence, a pull rope is wound around each gear, and the pull rope is connected to the fixing pin after being twisted and guided;

[0011] When any rolling body squeezes the elastic ring inward, the corresponding push rod moves inward and drives the gear to rotate, causing the pull rope to wrap around and pull the fixing pin inward. At this time, the rod body moves into the installation groove under the pull of the tension spring, causing the rod body and the rolling body to disengage from the track groove.

[0012] A further improvement is that a slide rail is provided in the cavity, a return spring is provided on the slide rail, and the fixing pin is slidably mounted on the slide rail and connected to the return spring.

[0013] A further improvement is that a merging pipe and a guide wheel are provided in the cavity, the pull rope passes through the merging pipe and is combined, and then guided by the guide wheel and connected to the fixing pin.

[0014] A further improvement is that the rolling body is a roller or a spherical ball.

[0015] A further improvement is that three special-shaped slots are provided on the edge of the dial, at least one positioning hole is provided in the special-shaped slots, the track groove is formed by a special-shaped slot plate, at least one positioning column is provided on the side of the special-shaped slot plate, and the special-shaped slot plate can be removably inserted into the special-shaped slot and inserted into the positioning hole through the positioning column.

[0016] The present invention also provides a heater housing, on which the above-mentioned automobile air-conditioning mode damper driving mechanism is provided.

[0017] The beneficial effects of the present invention are:

[0018] (1) The lever and the track groove in the driving mechanism adopt a fully matched rolling contact method, which can greatly improve the guiding accuracy of the track groove, thereby ensuring the angle control accuracy of the air door in each mode, and at the same time avoiding problems such as jamming, groove wall wear, and abnormal noise.

[0019] (2) The lever member in the driving mechanism adopts a movable rod body and a rolling body, which can automatically retract the corresponding rod body and rolling body and disengage the track groove when any air door is stuck. In this way, when the dial is continued to be driven to rotate, the track groove will not apply force to the corresponding lever member, thereby avoiding further damage to the stuck air door or the lever, connecting rod and other structures, while allowing other air doors to continue to turn normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of the damper drive mechanism in the automobile air conditioning mode;

[0021] Figure 2 Schematic diagram of the external structure of the lever;

[0022] Figure 3 A schematic diagram of the internal structure of the lever when the roller contacts the track groove;

[0023] Figure 4 for Figure 3 A magnified view of the middle part of the structure;

[0024] Figure 5 A schematic diagram of the internal structure of the lever when the roller is disengaged from the track groove;

[0025] Figure 6 Schematic diagram of the structure of the dial;

[0026] Figure 7 It is a structural diagram of the special-shaped groove plate;

[0027] Figure 8 is a structural schematic diagram of the heater housing;

[0028] In the figure: 1. dial; 2. track groove; 201. special-shaped groove plate; 202. positioning column; 3. dial lever; 301. rod body; 302. mounting frame; 303. rolling element; 304. cam; 305. elastic ring; 306. push rod; 307. mounting groove; 308. tension spring; 309. cavity; 310. fixing pin; 311. gear; 312. pull rope; 313. slide rail; 314. return spring; 315. junction pipe; 316. guide wheel; 4. face air door; 5. foot air door; 6. defrost air door; 7. two-link rod. DETAILED DESCRIPTION

[0029] The present application is described in further detail below in conjunction with the accompanying drawings. It is necessary to point out that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technicians in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0030] Example 1

[0031] Combine Figure 1-5 As shown, a car air conditioning mode damper driving mechanism includes a dial 1, which is provided with three track grooves 2. The three track grooves 2 have different shapes and are distributed at the edge of the dial 1. A lever member 3 is movably provided in the track groove 2. The lever member 3 is respectively connected to the rotating shafts of the face damper 4, the foot damper 5 and the defrost damper 6. The dial 1 is rotated by a motor. Under the guidance of each track groove 2, the lever member 3 drives the rotating shaft of the corresponding damper to rotate. This is the prior art and will not be described in detail. The improvement of this embodiment is that the lever member 3 includes a rod body 301, a mounting frame 302 provided at the end of the rod body 301, and a plurality of rolling bodies 303 provided on the outer ring of the mounting frame 302. All the rolling bodies 303 are evenly distributed along the same circumference, and the diameter of the circumference of all the rolling bodies 303 is equal to the width of the track groove 2. The lever member 3 is in rolling contact with the groove walls on both sides of the track groove 2 through the rolling bodies 303. In this way, the rod body 301 will always move along the center line of the track groove 2 without deviation, which can greatly improve the guiding accuracy of the track groove 2, thereby ensuring the angle control accuracy of each damper. At the same time, since rolling is used instead of sliding, problems such as jamming, groove wall wear, and abnormal noise can be avoided, thereby improving the stability and service life of the drive mechanism.

[0032] In this embodiment, the lever member 3 preferably further includes a cam 304, and the rod body 301 is mounted on the protruding portion of the cam 304. The rotating shaft of the foot damper 5 is connected to the side of the corresponding cam 304 via a second connecting rod 7, and the rotating shafts of the face damper 4 and the defrost damper 6 are coaxially connected to the wheel center of the corresponding cam 304.

[0033] Example 2

[0034] Combine Figure 1-5 As shown, a damper drive mechanism for an automotive air conditioning mode is further improved based on Example 1: an elastic ring 305 is provided on the exterior of a mounting frame 302, a rolling element 303 is provided on the outer wall of the elastic ring 305, and a plurality of push rods 306 are provided on the inner wall of the elastic ring 305, each corresponding to the position of the rolling element 303. The push rods 306 move inwardly through the mounting frame 302. The elastic ring 305 can be made of a metal material, such as copper, and has a certain degree of elasticity. When the rolling element 303 moves radially inward, it squeezes the elastic ring 305, causing it to dent.

[0035] In addition, a mounting slot 307 is provided at the protruding position of the cam 304, and the rod body 301 is movably provided in the mounting slot 307. A tension spring 308 connected to the end of the rod body 301 is provided in the mounting slot 307, and the tension spring 308 has a tendency to pull the rod body 301 to move into the mounting slot 307. A cavity 309 is provided in the rod body 301, and a fixing pin 310 is provided in the cavity 309. The fixing pin 310 extends outward from the wall of the rod body 301 and is engaged in the notch position of the mounting slot 307 to prevent the rod body 301 from moving into the mounting slot 307. Several gears 311 are provided inside the mounting frame 302, and the gears 311 are meshed with the side walls of the push rod 306 one by one. A pull rope 312 is wrapped around the gears 311, and the pull rope 312 is connected to the fixing pin 310 after being twisted and guided.

[0036] When a damper jams, its shaft cannot continue to rotate. If the motor continues to drive the dial 1, the applied pressure may damage the damper or the transmission structure, or even burn out the motor, affecting the rotation of other dampers. This embodiment effectively solves this problem. During operation, when any damper jams, its shaft cannot continue to rotate. If the dial 1 is continued to be driven, the groove wall of the track groove 2 will apply pressure to the rolling element 303, causing the corresponding rolling element 303 to squeeze the elastic ring 305 inward, causing the corresponding push rod 306 to move inward and drive the gear 311 to rotate, causing the pull rope 312 to wrap around and pull the fixing pin 310 inward. At this time, the rod body 301, pulled by the tension spring 308, moves into the installation groove 307, causing the rod body 301 and the rolling element 303 to disengage from the track groove 2. Therefore, when the pressure applied by the track groove 2 to the lever member 3 is relatively small, the lever member 3 can be separated from the track groove 2 to avoid being subjected to greater pressure, thereby avoiding further damage to the stuck damper or the transmission structure, while allowing other dampers to still turn normally.

[0037] In this embodiment, preferably, a slide rail 313 is provided in the cavity 309, and a return spring 314 is provided on the slide rail 313. The fixing pin 310 is slidably installed on the slide rail 313 and is connected to the return spring 314. The slide rail 313 can improve the stability and smoothness of the fixing pin 310 during movement, ensuring that the fixing pin 310 can be moved inward smoothly, and the return spring 314 helps it to reset.

[0038] In this embodiment, preferably, a converging tube 315 and a guide wheel 316 are provided in the cavity 309. The pull rope 312 passes through the converging tube 315 and is then joined together. The pull rope 312 is then guided by the guide wheel 316 and connected to the fixed pin 310. One end of the converging tube 315 is an arc-shaped opening, which helps the pull rope 312 to turn and slide. After being guided by the guide wheel 316, the pull rope 312 can be connected to the fixed pin 310 along its length direction, which makes it easier to pull the fixed pin 310.

[0039] In this embodiment, preferably, the rolling body 303 is a roller or a spherical ball, and the spherical ball is preferred, which can help the rolling body 303 to separate from the track groove 2.

[0040] Example 3

[0041] Recombination Figure 6-7 As shown, a vehicle air conditioning mode damper drive mechanism is provided. Based on Example 1, this embodiment has three special-shaped slots on the edge of the dial 1, each of which has at least one positioning hole. The track groove 2 is formed by a special-shaped slot plate 201, and at least one positioning column 202 is provided on the side of the special-shaped slot plate 201. The special-shaped slot plate 201 can be removably inserted into the special-shaped slot and inserted into the positioning hole through the positioning column 202. The two ends of the special-shaped slot can be set to a closed arc shape, so that the special-shaped slot plate 201 will not be easily detached after being inserted.

[0042] This embodiment uses a dial 1 that is completely different from the prior art. Its track groove 2 can be disassembled, so that the track groove 2 can be installed and disassembled separately, so that the driving mechanism can select the track groove 2 that is suitable for the dial lever 3, reducing production costs and increasing product adaptability.

[0043] Example 4

[0044] like Figure 8 As shown, a heater housing is provided with the above-mentioned automobile air conditioning mode damper driving mechanism.

[0045] The above-described embodiments merely illustrate several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, and all such variations and improvements fall within the scope of protection of the present invention.

Claims

1. A vehicle air conditioning mode damper driving mechanism, comprising a dial (1), wherein the dial (1) is provided with three track grooves (2), wherein each track groove (2) is movably provided with a lever member (3), wherein the lever member (3) is respectively connected to the rotating shafts of a face damper (4), a foot damper (5) and a defrost damper (6), and wherein the mechanism is characterized in that: The shift lever (3) includes a rod body (301), a mounting frame (302) provided at the end of the rod body (301), and a plurality of rolling bodies (303) provided on the outer ring of the mounting frame (302), all the rolling bodies (303) are evenly distributed along the same circumference, and the diameter of the circumference of all the rolling bodies (303) is equal to the width of the track groove (2), and the shift lever (3) is in rolling contact with the groove walls on both sides of the track groove (2) through the rolling bodies (303); The lever member (3) further comprises a cam (304), the rod bodies (301) are all mounted at the protruding position of the cam (304), an elastic ring (305) is provided on the outside of the mounting frame (302), the rolling body (303) is provided on the outer wall of the elastic ring (305), and the inner wall of the elastic ring (305) is provided with a plurality of push rods (306) corresponding to the positions of the rolling bodies (303), and the push rods (306) are movable inwardly and penetrate the mounting frame (302); A mounting groove (307) is provided at a protruding position of the cam (304), the rod body (301) is movably arranged in the mounting groove (307), a tension spring (308) connected to the end of the rod body (301) is provided in the mounting groove (307), a cavity (309) is provided in the rod body (301), a fixing pin (310) is provided in the cavity (309), the fixing pin (310) extends outward from the wall of the rod body (301) and is engaged with the notch position of the mounting groove (307) to prevent the rod body (301) from moving toward the mounting groove (307), a plurality of gears (311) are provided inside the mounting frame (302), the gears (311) are meshed with the side walls of the push rod (306) in a one-to-one correspondence, a pull rope (312) is wound around each gear (311), and the pull rope (312) is connected to the fixing pin (310) after being combined and guided; When any rolling body (303) squeezes the elastic ring (305) inward, the corresponding push rod (306) moves inward and drives the gear (311) to rotate, so that the pull rope (312) is wound around and pulls the fixing pin (310) inward. At this time, the rod body (301) moves into the installation groove (307) under the pull of the tension spring (308), so that the rod body (301) and the rolling body (303) are separated from the track groove (2).

2. The automobile air conditioning mode damper driving mechanism according to claim 1, characterized in that: The rotating shaft of the foot-blowing damper (5) is connected to the side position of the corresponding cam (304) through two connecting rods (7), and the rotating shafts of the face-blowing damper (4) and the defrosting damper (6) are coaxially connected to the wheel center position of the corresponding cam (304).

3. The automobile air conditioning mode damper driving mechanism according to claim 1, characterized in that: A slide rail (313) is provided in the cavity (309), a return spring (314) is provided on the slide rail (313), and the fixing pin (310) is slidably mounted on the slide rail (313) and connected to the return spring (314).

4. The automobile air conditioning mode damper driving mechanism according to claim 1, characterized in that: A confluence tube (315) and a guide wheel (316) are provided in the cavity (309); the pull rope (312) passes through the confluence tube (315) and then joins together, and is then guided by the guide wheel (316) and connected to the fixing pin (310).

5. The automobile air conditioning mode damper driving mechanism according to claim 1, characterized in that: The rolling body (303) is a roller or a spherical ball.

6. The automobile air conditioning mode damper driving mechanism according to claim 1, characterized in that: The dial (1) is provided with three special-shaped slots on its edge, and at least one positioning hole is provided in the special-shaped slots. The track slot (2) is formed by a special-shaped slot plate (201), and at least one positioning column (202) is provided on the side of the special-shaped slot plate (201). The special-shaped slot plate (201) can be detachably inserted into the special-shaped slots and inserted into the positioning holes through the positioning columns (202).

7. A heater housing, characterized in that: The heater housing is provided with an automobile air conditioning mode damper driving mechanism according to any one of claims 1 to 6.

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