Thermal management system actuator

Abstract

The utility model provides a thermal management system actuator which comprises a box body, a gear train arranged in the box body, a fixing plate and a motor, and an upper shell is arranged on the box body in a sealing mode. The gear train comprises a motor gear, a first-stage gear, a second-stage gear, a third-stage gear and an output gear which are sequentially in transmission connection, the motor gear is fixedly connected to an output shaft of a motor, a rotating shaft on the output gear is connected with a shaft sleeve on a fixing plate, and the fixing plate is fixedly connected with the box body; transmission wheel shafts of the motor gear, the first-stage gear, the second-stage gear, the third-stage gear and the output gear are arranged in a special-shaped loop mode, and the rotation inertia centers of all the transmission wheel shafts are evenly arranged around the mass center of the installation fixing face of the box body. The assembly process of the gear train is simplified, the size chain is simplified, and the size precision of the final assembly gear train is high; the four-stage transmission wheel shafts are arranged, the space is fully utilized, the size is reduced, the structure is compact, all rotation inertia centers are evenly arranged around the mass center of the installation fixing face of the box body, and resonance is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile thermal management systems, in particular to a thermal management system actuator, which is mainly used for battery water valve actuators. Background Art

[0002] At present, new energy vehicles are developing vigorously, and their batteries need to be in a constant temperature state to maintain the highest energy efficiency. Therefore, an efficient thermal management system that can adapt to various working conditions is needed to ensure that the batteries of new energy vehicles are in a constant temperature state. The battery water valve actuator of the existing automotive thermal management system has a valve body that is multi-channel and integrated, and the actuator box that matches it has the disadvantages of complex control, difficult control, scattered layout, large size, and high parts cost.

[0003] The common thermal management drive box on the market at present is designed with a split rotating shaft, that is, the box body and the box cover constitute the upper and lower rotating shaft fixed ends, the assembly is complicated, the cumulative size tolerance of the assembly after laser welding is large, and the manufacturing tolerance requirements of the box body and the cover are strict, which is easy to produce abnormal noise and reduce efficiency; in addition, the common thermal management drive box adopts a four-stage W-shaped transmission shaft arrangement, the overall drive volume is large, and the requirements for the battery and drive box space arrangement are strict, which is not friendly, the weight is increased, and it is not conducive to lightweight design. Utility Model Content

[0004] The technical problem to be solved by the utility model is: in order to overcome the deficiencies in the prior art, the utility model provides a thermal management system actuator in view of the problems of complex assembly, heavy weight, large volume, etc.

[0005] The technical solution to be adopted by the utility model to solve its technical problems is: a thermal management system actuator, including a box, a gear train, a fixed plate, a motor and an upper shell, the gear train, the fixed plate and the motor are all arranged in the box, and the upper shell is sealed at the opening of the upper end of the box; the gear train includes a motor gear, a first-stage gear, a second-stage gear, a third-stage gear and an output gear, the motor gear is fixedly connected to the output shaft of the motor, the motor gear, the first-stage gear, the second-stage gear, the third-stage gear and the output gear are sequentially connected in transmission, and are used to transmit the torque of the motor to the output gear, the output gear is provided with a rotating shaft, the fixed plate is provided with a shaft sleeve matching the rotating shaft, and the end of the rotating shaft is connected by a bearing The fixed plate is arranged above the gear train and fixedly connected to the housing; the transmission axles of the motor gear, the first-stage gear, the second-stage gear, the third-stage gear and the output gear are arranged in a special-shaped loop, and the rotational inertia centers of each transmission axle are evenly arranged around the centroid of the housing mounting fixed surface, and the distribution satisfies the following conditions: α1 is 53°, α2 is 73°, and α3 is 108°, wherein α1 is the angle between AB and BC, α2 is the angle between BC and CD, α3 is the angle between CD and DE, and A, B, C, D, and E are the rotational inertia centers of the transmission axles of the motor gear, the first-stage gear, the second-stage gear, the third-stage gear and the output gear, respectively.

[0006] Furthermore, in order to achieve a reasonable distribution of gears at each level while ensuring transmission and reduce the occupied volume, the first-stage gear includes a first-stage large gear and a first-stage small gear, and the first-stage large gear and the first-stage small gear are coaxially arranged up and down; the second-stage gear includes a second-stage large gear and a second-stage small gear, and the second-stage small gear and the second-stage large gear are coaxially arranged up and down, and the second-stage large gear is located below the first-stage large gear; the third-stage gear includes a third-stage large gear and a third-stage small gear, and the third-stage small gear and the third-stage large gear are coaxially arranged up and down, and the third-stage large gear is located above the second-stage large gear and the output gear; the motor gear is meshed with the first-stage large gear, the first-stage small gear is meshed with the second-stage large gear, the second-stage small gear is meshed with the third-stage large gear, and the third-stage small gear is meshed with the output gear.

[0007] Furthermore, the transmission ratio of the gear train is 305.

[0008] Furthermore, in order to achieve the connection between the box body and the upper shell, a first fixing structure for achieving the connection is provided between the box body and the upper shell. The first fixing structure includes a plurality of positioning columns arranged in the box body and a plurality of positioning sleeves arranged on the upper shell. The positioning columns and the positioning sleeves are matched one by one. During installation, the upper ends of the positioning columns are inserted into the positioning sleeves to achieve the positioning and fixation between the upper shell and the box body.

[0009] Specifically, the positioning column and the positioning sleeve are interference fit.

[0010] Furthermore, in order to achieve the connection between the box body and the fixed plate, a second fixing structure is provided between the box body and the fixed plate, and the second fixing structure includes a supporting fixing column and a fixing column sleeve arranged on the fixed plate, and the supporting fixing column passes through the fixing column sleeve from top to bottom, and the bottom is fixedly connected to the bottom of the box body, and the connection method can be threaded connection, interference fit and the like.

[0011] In order to facilitate the fixed connection between the box body and other components, three connecting seats are provided on the outer periphery of the bottom of the box body, and fixation with other structures is achieved through the three connecting seats.

[0012] The beneficial effects of the utility model compared with traditional products are:

[0013] (1) In the utility model, the other fixed end of the rotating shaft of the housing is directly connected to the supporting fixed column of the housing through a fixed plate by interference fit, which simplifies the assembly process of the gear system, simplifies the dimension chain, and further improves the dimensional accuracy of the assembled gear system by 0.02~0.03mm, thereby improving efficiency, reducing transmission NVH, and achieving the design requirements in one design, which is a good level in the industry.

[0014] (2) The four-stage transmission wheel shaft transmission is arranged into a special-shaped loop, which makes full use of the space and reduces the volume by 10%~25%. The structure is compact, and the centers of rotational inertia are evenly arranged around the center of mass of the box installation fixing surface, which effectively reduces resonance and reduces the fixing installation hole of one box. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the thermal management system actuator of the utility model.

[0017] Figure 2 It is a schematic diagram of the exploded structure of the thermal management system actuator of the utility model.

[0018] Figure 3 It is a schematic diagram of the gear train structure.

[0019] Figure 4 It is a schematic diagram of the distribution of the center of rotational inertia of gears at each level of the gear system.

[0020] Figure 5 It is a top view structural diagram of the box.

[0021] Figure 6 2 is a dimensional diagram of the box body of this embodiment.

[0022] In the figure: 1. casing, 11. positioning column, 2. gear train, 21. motor gear, 22. first-stage gear, 221. first-stage large gear, 222. first-stage small gear, 23. second-stage gear, 231. second-stage large gear, 232. second-stage small gear, 24. third-stage gear, 241. third-stage large gear, 242. third-stage small gear, 25. output gear, 26. rotating shaft, 3. fixing plate, 31. bushing, 32. fixing column sleeve, 4. motor, 5. upper casing, 51. positioning sleeve, 6. supporting fixing column, 7. connecting seat. DETAILED DESCRIPTION

[0023] The present invention is now described in further detail in conjunction with the accompanying drawings. These drawings are simplified schematic diagrams that only illustrate the basic structure of the present invention in a schematic manner, so they only show the components related to the present invention, and directions and references (e.g., up, down, left, right, etc.) may only be used to help describe the features in the drawings. Therefore, the following specific embodiments are not adopted in a restrictive sense, and the scope of the subject matter for which protection is sought is limited only by the attached claims and their equivalents.

[0024] like Figure 1-Figure 2As shown, a thermal management system actuator of the utility model comprises a housing 1, a gear train 2, a fixing plate 3, a motor 4 and an upper housing 5, wherein the gear train 2, the fixing plate 3 and the motor 4 are all arranged in the housing 1, and the upper housing 5 is sealed at the upper opening of the housing 1; the gear train 2 comprises a motor gear 21, a first-stage gear 22, a second-stage gear 23, a third-stage gear 24 and an output gear 25, wherein the motor gear 21 is fixedly connected to the output shaft of the motor 4, and the motor gear 21, the first-stage gear 22, the second-stage gear 23, the third-stage gear 24 and the output gear 25 are sequentially transmission-connected for transmitting the torque of the motor 4 to the output gear 25, wherein the output gear 25 is provided with a rotating shaft 26, and the fixing plate 3 is provided with a shaft sleeve 31 matching the rotating shaft 26, and the end of the rotating shaft 26 is rotationally connected in the shaft sleeve 31 through a bearing, and the fixing plate 3 is arranged above the gear train 2 and fixedly connected to the housing 1. In order to realize the connection between the box body 1 and the upper shell 5, a first fixing structure for realizing the connection is provided between the box body 1 and the upper shell 5, and the first fixing structure includes a plurality of positioning columns 11 arranged in the box body 1, and a plurality of positioning sleeves 51 arranged on the upper shell 5, and the positioning columns 11 are matched with the positioning sleeves 51 one by one. During installation, the upper ends of the positioning columns 11 are inserted into the positioning sleeves 51 to realize the positioning and fixation between the upper shell 5 and the box body 1. Specifically, the positioning columns 11 and the positioning sleeves 51 are interference fit. In order to realize the connection between the box body 1 and the fixed plate 3, a second fixing structure is provided between the box body 1 and the fixed plate 3, and the second fixing structure includes a supporting fixing column 6 and a fixing column sleeve 32 arranged on the fixing plate 3, and the supporting fixing column 6 passes through the fixing column sleeve 32 from top to bottom, and the bottom is fixedly connected to the bottom of the box body 1, and the connection method can be threaded connection, interference fit, etc.

[0025] like Figure 3 As shown, the first-stage gear 22 includes a first-stage large gear 221 and a first-stage small gear 222, and the first-stage large gear 221 and the first-stage small gear 222 are coaxially arranged up and down; the second-stage gear 23 includes a second-stage large gear 231 and a second-stage small gear 232, and the second-stage small gear 232 and the second-stage large gear 231 are coaxially arranged up and down, and the second-stage large gear 231 is located below the first-stage large gear 221; the third-stage gear 24 includes a third-stage large gear 241 and a third-stage small gear 242, and the third-stage small gear 242 and the third-stage large gear 241 are coaxially arranged up and down, and the third-stage large gear 241 is located above the second-stage large gear 231 and the output gear 25; the motor gear 21 is meshed with the first-stage large gear 221, the first-stage small gear 222 is meshed with the second-stage large gear 231, the second-stage small gear 232 is meshed with the third-stage large gear 241, and the third-stage small gear 242 is meshed with the output gear 25. The transmission ratio of the gear train 2 is 305.

[0026] like Figure 4As shown, the transmission axles of the motor gear 21, the first-stage gear 22, the second-stage gear 23, the third-stage gear 24 and the output gear 25 are arranged in a special-shaped loop, and the rotational inertia center of each transmission axle is evenly arranged around the centroid of the mounting and fixing surface of the housing 1, and its distribution satisfies the following conditions: α1 is 53°, α2 is 73°, and α3 is 108°, wherein α1 is the angle between AB and BC, α2 is the angle between BC and CD, α3 is the angle between CD and DE, and A, B, C, D, and E are the rotational inertia centers of the transmission axles of the motor gear 21, the first-stage gear 22, the second-stage gear 23, the third-stage gear 24 and the output gear 25, respectively.

[0027] like Figure 5 As shown, in order to facilitate the fixed connection between the box body 1 and other components, three connecting seats 7 are provided on the outer periphery of the bottom of the box body 1, and the three connecting seats 7 are used to achieve fixation with other structures. Figure 6 As shown, in this embodiment, the length, width and height of the box body 1 are 65 mm, 52 mm and 58 mm respectively, and the distance between the two oppositely arranged connecting seats 7 is 68 mm.

[0028] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without departing from the scope of the utility model through the above description. The technical scope of this utility model is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A thermal management system actuator, characterized in that: It includes a box body, a gear train, a fixed plate, a motor and an upper shell, wherein the gear train, the fixed plate and the motor are all arranged in the box body, and the upper shell is sealed at the upper opening of the box body; the gear train includes a motor gear, a first-stage gear, a second-stage gear, a third-stage gear and an output gear, wherein the motor gear is fixedly connected to the output shaft of the motor, and the motor gear, the first-stage gear, the second-stage gear, the third-stage gear and the output gear are sequentially connected in transmission to transmit the torque of the motor to the output gear, wherein a rotating shaft is arranged on the output gear, and a shaft sleeve matching the rotating shaft is arranged on the fixed plate, and the end of the rotating shaft is rotatably connected in the shaft sleeve; the fixed plate is arranged on the gear The transmission axles of the motor gear, the first-stage gear, the second-stage gear, the third-stage gear and the output gear are arranged in a special-shaped loop, and the rotational inertia centers of the transmission axles are evenly arranged around the centroid of the mounting fixed surface of the box, and their distribution meets the following conditions: α1 is 53°, α2 is 73°, and α3 is 108°, wherein α1 is the angle between AB and BC, α2 is the angle between BC and CD, α3 is the angle between CD and DE, and A, B, C, D, and E are the rotational inertia centers of the transmission axles of the motor gear, the first-stage gear, the second-stage gear, the third-stage gear and the output gear, respectively.

2. The thermal management system actuator according to claim 1, characterized in that: The first stage gear comprises a first stage large gear and a first stage small gear, and the first stage large gear and the first stage small gear are coaxially arranged up and down; the second stage gear comprises a second stage large gear and a second stage small gear, and the second stage small gear and the second stage large gear are coaxially arranged up and down, and the second stage large gear is located below the first stage large gear; the third stage gear comprises a third stage large gear and a third stage small gear, and the third stage small gear and the third stage large gear are coaxially arranged up and down, and the third stage large gear is located above the second stage large gear and the output gear; The motor gear is meshed with the first-stage large gear, the first-stage small gear is meshed with the second-stage large gear, the second-stage small gear is meshed with the third-stage large gear, and the third-stage small gear is meshed with the output gear.

3. The thermal management system actuator according to claim 1, characterized in that: The gear ratio of the gear train is 305.

4. The thermal management system actuator according to claim 1, characterized in that: A first fixing structure is provided between the box body and the upper shell body to realize the connection between them. The first fixing structure includes a plurality of positioning posts arranged in the box body and a plurality of positioning sleeves arranged on the upper shell body. The positioning posts are matched with the positioning sleeves one by one. During installation, the upper ends of the positioning posts are inserted into the positioning sleeves to realize the positioning and fixation between the upper shell body and the box body.

5. The thermal management system actuator according to claim 4, characterized in that: The positioning column and the positioning sleeve are interference fit.

6. The thermal management system actuator according to claim 1, characterized in that: A second fixing structure is provided between the box body and the fixing plate, and the second fixing structure comprises a supporting fixing column and a fixing column sleeve arranged on the fixing plate, the supporting fixing column passes through the fixing column sleeve from top to bottom, and the bottom is fixedly connected to the bottom of the box body.

7. The thermal management system actuator according to claim 1, characterized in that: The outer periphery of the bottom of the box body is provided with three connection seats, and fixation with other structures is achieved through the three connection seats.

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