Zipper type rack transmission mechanism for double-mixing air door

Abstract

The utility model belongs to the technical field of automobile air conditioner assembly part design, and relates to a zipper type rack transmission mechanism for a double-mixing air door, which comprises a driving gear, a rack and a rocker arm gear, the driving gear is circumferentially and fixedly arranged on an upper mixing air door of the double-mixing air door and is meshed with the rack; the rack is arranged between the double mixing air doors in the vertical direction, and the rocker arm gear is fixedly installed on a lower mixing air door in the double mixing air doors in the circumferential direction and meshed with the rack. The zipper type rack transmission mechanism composed of the driving gear, the rack and the rocker arm gear is used for achieving transmission connection of the double-mixing air door, assembly is easy, operation is easier and more effective, the rack structure is optimized, the characteristics of plastic materials are matched, and the service life of the double-mixing air door is prolonged. And the rack is not meshed with the driving gear or the rocker arm gear too tightly or too loosely, so that the problem of large transmission force of the gear is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of the design of components of an automotive air-conditioning assembly, and relates to a zipper-type rack transmission mechanism for a dual mixing air door. Background Art

[0002] With the rapid development of the automotive industry, the design and performance of automotive air-conditioning systems are also constantly improving. Among them, the dual mixing air door and its transmission mechanism are crucial components in the automotive air-conditioning system. However, there are still many problems in the actual application of the currently conventionally designed automotive air-conditioning dual mixing air door and its transmission mechanism.

[0003] The traditional design of the transmission mechanism of the automotive air-conditioning dual mixing air door usually includes multiple gear components, such as a driving gear 3, a transmission gear 4, and a rocker gear 2, etc.; as Figure 1 shown, there are two rocker gears 2, which are respectively installed on two mixing air doors 1. The driving gear 3 meshes with one of the rocker gears 2, and meshes with the other rocker gear 2 through the transmission gear 3. It also includes a gasket and screws for rotatably fixing the transmission gear 4. This complex design structure not only increases the manufacturing difficulty but also often causes various problems during the assembly process. Due to the large number of gears, the accuracy requirements during assembly are extremely high. Once the assembly is not in place, it will directly affect the opening degree of the air door, and further affect the performance of the air-conditioning system. In addition, this design also has very strict requirements for the meshing dimensions of the gears. If the meshing dimension of the gears is too large, it will cause an over-tight situation during the assembly process, making the assembly process extremely difficult and even possibly damaging the gears or other components. On the contrary, if the meshing dimension is too small, although the assembly process may become easier, in actual use, the transmission force will increase, which will not only accelerate the wear of the gears but also may have an adverse impact on the entire transmission system. More seriously, the fault tolerance of this design scheme is very small. During the production process of plastic mold parts, any tiny dimensional deviation may lead to the failure of the entire transmission system. This undoubtedly increases the control difficulty of the production process and also greatly reduces the qualified rate of the products.

[0004] In summary, the existing design of the automotive air-conditioning dual mixing air door and its transmission mechanism has many problems such as complex structure, difficult assembly, small fault tolerance, and high requirements for production control. These problems not only affect the quality and performance of the products but also increase the production cost and maintenance difficulty. Therefore, there is an urgent need for a new, simplified, and more fault-tolerant design of the transmission mechanism of the automotive air-conditioning dual mixing air door to improve production efficiency, reduce production costs, and ensure the quality and performance of the products. Summary of the Utility Model

[0005] In view of this, the purpose of the present utility model is to provide a zipper-type rack transmission mechanism for a dual mixing air door to solve the problems raised in the background art.

[0006] To achieve the above object, the present utility model provides the following technical solutions:

[0007] A zipper-type rack transmission mechanism for a dual mixing air door, which is composed of a driving gear, a rack, and a rocker gear. The driving gear is circumferentially and fixedly installed on the upper mixing air door in the dual mixing air door and meshes with the rack;

[0008] The rack is arranged vertically between the dual mixing air doors. The rocker gear is circumferentially and fixedly installed on the lower mixing air door in the dual mixing air door and meshes with the rack.

[0009] Further, the driving gear is connected with an actuator for driving its rotation to serve as the power source of the zipper-type rack transmission mechanism.

[0010] Further, the driving gear includes a gear, a first spline shaft and a second spline shaft fixedly arranged on both sides of the gear. The gear is rotatably installed on the automobile air-conditioning housing. The first spline shaft is connected to the actuator, and the second spline shaft is connected to the upper mixing air door.

[0011] Further, a hollow through groove is provided in the rack along the length direction of the rack, and a plurality of semicircular protrusions are arranged at intervals in the hollow through groove, and the rack is made of plastic material so that the meshing degree between the rack and the driving gear or the rocker gear is appropriate.

[0012] Further, the rack has a middle slider, a first rack and a second rack connected to both ends of the middle slider, and the tooth groove directions of the first rack and the second rack are opposite.

[0013] The beneficial effects of the present utility model are as follows:

[0014] The zipper-type rack transmission mechanism for a dual mixing air door provided by the present utility model realizes the transmission connection of the dual mixing air door through a zipper-type rack transmission mechanism composed of a driving gear, a rack, and a rocker gear. Compared with the traditional transmission mechanism of the dual mixing air door of an automobile air conditioner, the present utility model saves material costs and assembly costs, and also optimizes the assembly scheme, making the assembly simple, easier to operate and more effective.

[0015] Secondly, the present utility model optimizes the rack structure. Combining with the characteristics of its plastic material, the meshing between the rack and the driving gear or the rocker gear will not be too tight or too loose, thereby solving the problem of large transmission force of the gear.

[0016] Other advantages, objectives and features of the present utility model will be described to some extent in the subsequent description, and to some extent, will be obvious to those skilled in the art based on the study of the following text, or can be learned from the practice of the present utility model. The objectives and other advantages of the present utility model can be realized and obtained through the following description. Brief Description of the Drawings

[0017] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be described in detail preferably with reference to the accompanying drawings, where:

[0018] Figure 1 is a schematic structural view of the dual mixing air door and its transmission mechanism in the background art;

[0019] Figure 2 is a schematic structural view of a zipper-type rack transmission mechanism for a dual mixing air door in an embodiment;

[0020] Figure 3 is an assembly schematic view of a zipper-type rack transmission mechanism for a dual mixing air door in an automotive air-conditioning housing in an embodiment;

[0021] Figure 4 is a partial structural schematic view of a zipper-type rack transmission mechanism for a dual mixing air door in an embodiment;

[0022] Figure 5 is a schematic structural view of a driving gear in an embodiment.

[0023] Reference numerals: mixing air door 1, rocker gear 2, driving gear 3, transmission gear 4, driving gear 5, first spline shaft 51, gear 52, second spline shaft 53, rack 6, hollow through groove 61, semi-circular protrusion 62. Detailed Description of the Specific Embodiment

[0024] The following uses specific specific examples to illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. The present utility model can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present utility model. It should be noted that the diagrams provided in the following embodiments only illustrate the basic concept of the present utility model in a schematic manner. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0025] Among them, the attached drawings are only for illustrative purposes, showing only schematic diagrams rather than actual pictures, and should not be construed as a limitation on the present utility model; in order to better illustrate the embodiments of the present utility model, some components in the attached drawings will be omitted, enlarged or reduced, which does not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the attached drawings may be omitted.

[0026] In the attached drawings of the embodiments of the present utility model, the same or similar reference numerals correspond to the same or similar components; in the description of the present utility model, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc. indicating the orientation or position relationship, they are based on the orientation or position relationship shown in the attached drawings. This is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the attached drawings are only for illustrative purposes and should not be construed as a limitation on the present utility model. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0027] As Figure 1 shown, the traditional double mixing air door drive mechanism of an automotive air conditioner usually includes multiple gear components, such as a driving gear 3, a transmission gear 4, and a rocker gear 2; there are two rocker gears 2, which are respectively installed on two mixing air doors 1. The driving gear 3 meshes with one of the rocker gears 2 and meshes with the other rocker gear 2 through the transmission gear 3. It also includes a gasket and screws for rotatably fixing the transmission gear 4. This complex design structure not only increases the manufacturing difficulty but also often causes various problems during the assembly process. Due to the large number of gears, the precision requirements during assembly are extremely high. Once the assembly is not in place, it will directly affect the opening degree of the air door, thereby affecting the performance of the air conditioning system. In addition, this design also has very strict requirements for the meshing dimensions of the gears. If the meshing dimension of the gears is too large, it will cause an over-tight situation during the assembly process, making the assembly process extremely difficult and even possibly damaging the gears or other components. On the contrary, if the meshing dimension is too small, although the assembly process may become easier, during actual use, the transmission force will increase, which will not only accelerate the wear of the gears but also may have an adverse impact on the entire transmission system. More seriously, the tolerance of this design scheme is very small. During the production process of plastic mold parts, any tiny dimensional deviation may lead to the failure of the entire transmission system. This undoubtedly increases the control difficulty of the production process and also greatly reduces the qualified rate of the products.

[0028] Embodiment

[0029] Please refer to Figures 2 to 5, it is a zipper - type rack drive mechanism for a dual - mixing air damper, which consists of a driving gear 5, a rack 6, and a rocker gear 2. The driving gear 5 is circumferentially and fixedly installed on the upper mixing air damper of the dual - mixing air damper, meshes with the rack 6, and the rack 6 is arranged vertically between the dual - mixing air dampers. The rocker gear 2 is circumferentially and fixedly installed on the lower mixing air damper of the dual - mixing air damper and meshes with the rack 6;

[0030] The driving gear 5 is connected to an actuator that drives its rotation, serving as the power source of this zipper - type rack drive mechanism. It drives the upper mixing air damper of the dual - mixing air damper to rotate and the rack 6 to reciprocate up and down through the driving gear 5, and drives the rocker gear 2 to rotate through the reciprocating up - and - down movement of the rack 6, thereby driving the lower mixing air damper of the dual - mixing air damper to rotate.

[0031] This embodiment is an improvement based on the traditional transmission mechanism of the automotive air - conditioning dual - mixing air damper. It reduces the transmission gears, gaskets, and screws for fixing the transmission gears, which can save material costs and assembly costs. It also optimizes the assembly scheme, making the assembly simpler, easier to operate, and more efficient. The rack structure enables smooth meshing between the rack and the gear, reducing the problems of over - tight and over - loose gear meshing caused by the instability of the gear pitch diameter size under a fixed transmission ratio of the gear structure, thus solving the problem of large gear transmission force.

[0032] Specifically, the driving gear 5 includes a gear 52, a first spline shaft 51 and a second spline shaft 53 fixedly arranged on both sides of the gear 52. The gear 52 is rotatably installed on the automotive air - conditioning housing. The first spline shaft 51 is connected to the actuator as the power source of the mechanism, and the second spline shaft 53 is connected to the upper mixing air damper. The actuator drives the driving gear 5 to rotate. The driving gear 5 drives the rack 6 meshing with it to reciprocate up and down through the rotation of the gear 52, drives the upper mixing air damper to move through the second spline shaft 53, and the reciprocating up - and - down movement of the rack 6 drives the rocker gear 2 to rotate. The rocker gear 2 is connected to the lower mixing air damper to drive the lower mixing air damper to rotate, thereby realizing the transmission connection of the dual - mixing air damper through a zipper - type rack drive mechanism composed of a driving gear, a rack, and a rocker gear.

[0033] Preferably, the driving gear 5, the rack 6, and the rocker gear 2 are all made of plastic material. A hollow through - slot 61 is provided along the length direction of the rack 6, and several semi - circular protrusions 62 are arranged at intervals in the hollow through - slot 61. Through this structural design of internal rack hollowing and local uniform distribution of semi - circular protrusions, the meshing degree of the rack can be adjusted, so that the meshing between the rack and the driving gear or the rocker gear will not be too tight or too loose, thereby avoiding the problem of large gear transmission force.

[0034] Further, in this embodiment, the rack 6 has a middle slider, a first rack 63 and a second rack 64 connected to both ends of the middle slider, and the tooth groove directions of the first rack 63 and the second rack 64 are opposite, so as to slidably embed the rack 6 in the automotive air-conditioning housing. Specifically, a limiting rib groove matching the rack 6 is provided in the automotive air-conditioning housing to ensure that the rack 6 makes a reciprocating up-and-down movement under the action of the driving gear without deviation.

[0035] Specifically, the first rack 63 is used to mesh with the driving gear 5, and the second rack 64 is used to mesh with the rocker gear 2, and the driving gear and the rotational position of the rocker gear 2 are limited by the middle slider.

[0036] In this embodiment, the zipper-type rack transmission mechanism is arranged on one side of the double mixing air door, and the control of four air doors is realized by one actuator.

[0037] In another embodiment, when the two air doors on the left and the two air doors on the right in the double mixing air door need to be independently controlled, a zipper-type rack transmission mechanism is arranged on each side of the double mixing air door, and then the independent control of the two air doors on the left and the two air doors on the right is realized by two actuators.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the present technical solution, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A zipper-type rack transmission mechanism for a double mixing air damper, characterized in that: It is composed of a driving gear, a rack and a rocker gear. The driving gear is circumferentially and fixedly installed on the upper mixing air door in the double mixing air door and meshes with the rack. The rack is arranged vertically between the double mixing air doors. The rocker gear is circumferentially and fixedly installed on the lower mixing air door in the double mixing air door and meshes with the rack.

2. The zip - type rack transmission mechanism for the dual mixing air damper according to claim 1, wherein: The driving gear is connected with an actuator for driving it to rotate to serve as the power source of this zipper-type rack transmission mechanism.

3. The zipper type rack transmission mechanism for the dual mixing air door according to claim 2, characterized in that: The driving gear includes a gear, a first spline shaft and a second spline shaft fixedly arranged on both sides of the gear. The gear is rotatably installed on the automotive air-conditioning housing. The first spline shaft is connected to the actuator, and the second spline shaft is connected to the upper mixing air door.

4. The zipper-type rack drive mechanism for a dual mixing air damper according to claim 1, characterized in that: A hollow through groove is provided along the length direction of the rack, and a number of semicircular protrusions arranged at intervals are provided in the hollow through groove. The rack is made of plastic material so that the meshing degree between the rack and the driving gear or the rocker gear is appropriate.

5. The zip-type rack drive mechanism for a double mixing air door according to claim 1, wherein: The rack has a middle slider, a first rack and a second rack connected to both ends of the middle slider, and the tooth groove directions of the first rack and the second rack are opposite.

Images