Transmission mechanism with high coaxiality and vehicle-mounted refrigerator

Abstract

The utility model provides a transmission mechanism with high coaxiality and a vehicle-mounted refrigerator, the transmission mechanism with high coaxiality comprises a fixed support, a driving motor and a transmission assembly, the transmission assembly comprises a coupling and a transmission screw, and the axis of the driving motor, the axis of the coupling and the axis of the transmission screw are coaxially arranged on the fixed support. Specifically, the output shaft of the driving motor, the coupler and the transmission screw are coaxially arranged on the fixing support, so that the concentricity problem in the prior art is effectively solved, centrifugal movement caused by non-concentricity is reduced, vibration and noise are reduced, and the running stability and comfort of the vehicle-mounted refrigerator are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle-mounted refrigerators, in particular to a transmission mechanism with high coaxiality and a vehicle-mounted refrigerator. Background Art

[0002] In the early days of the industry, refrigerators installed in cars were all made in the top-opening mode. This was mainly because the use environment of cars is relatively special, and more attention was paid to safety during the driving process of the car. For example, during acceleration and emergency braking, the door of the vehicle-mounted refrigerator should not suddenly pop out and impact to cause harm to people. With the improvement of people's living quality requirements, more consideration was given to automatic opening, and the drawer-type automatic opening mode came into being. On furniture drawers, we can naturally add drawer handles, but on vehicle-mounted refrigerators, adding door handles will easily hurt passengers.

[0003] Chinese Patent Document No. CN218442923U disclosed a screw-driven pull-out vehicle-mounted refrigerator in 2023. Specifically, it includes a vehicle-mounted refrigerator main body, on which a refrigeration chamber and an installation chamber located outside the refrigeration chamber are provided. A guide through-hole penetrating into the installation chamber is provided on the rear side wall of the refrigeration chamber. An opening communicating with the refrigeration chamber is provided on the front end face of the vehicle-mounted refrigerator main body. The vehicle-mounted refrigerator main body is provided with an end cover that movably covers the opening. The vehicle-mounted refrigerator main body is provided with an evaporator for refrigerating the refrigeration chamber, a compressor and a condenser connected to the evaporator; a pull-out drawer, which is arranged in the refrigeration chamber and can move back and forth relative to the refrigeration chamber; a driving motor, which is arranged in the installation chamber and located at the rear end of the refrigeration chamber; a fixed seat, which is arranged on the inner wall of the refrigeration chamber, and a screw rod is pivotally connected to the fixed seat. The screw rod can rotate on the fixed seat, and the end of the screw rod passes through the guide through-hole and is connected to the output end of the driving motor; a moving seat, which is installed on the pull-out drawer, and a driving threaded hole screwed on the screw rod is provided on the moving seat. In the above-mentioned disclosed patent document, due to the non-concentricity between the driving motor and the screw rod, a centrifugal motion will be formed, resulting in vibration noise during operation.

[0004] Therefore, further improvement is needed. Summary of the Utility Model

[0005] Based on this, the purpose of the present utility model is to provide a transmission mechanism and a vehicle-mounted refrigerator with high coaxiality to overcome the deficiencies in the prior art. The output shaft of the motor, the coupling and the transmission shaft are coaxially arranged on the fixed bracket, ensuring that the axes of the output shaft of the motor, the coupling and the transmission shaft are concentric, and reducing vibration noise.

[0006] A transmission mechanism with high coaxiality designed for this purpose includes a fixed bracket, a driving motor, and a transmission component. The transmission component includes a coupling and a transmission screw rod, and the axes of the driving motor, the coupling, and the transmission screw rod are coaxially arranged on the fixed bracket.

[0007] The axes of the driving motor and the transmission screw rod are coaxially arranged on the fixed bracket through the coupling.

[0008] The output shaft of the driving motor is connected to one end of the coupling, and the other end of the coupling is connected to one end of the transmission screw rod.

[0009] The fixed bracket is provided with a guiding part for installing the transmission screw rod, and a bushing is arranged on the guiding part. The other end of the transmission screw rod is connected to the bushing in a matching manner.

[0010] The axes of the output shaft of the driving motor, the coupling, the transmission screw rod, the bushing, and the bearing are coaxially arranged on the fixed bracket.

[0011] The guiding part is provided with a positioning seat, and the bushing is installed on the positioning seat by a buckle or a screw.

[0012] The transmission mechanism further includes a bearing, and the bearing is sleeved on one end of the transmission screw rod.

[0013] The fixed bracket is provided with a positioning part for installing the coupling and the bearing.

[0014] The fixed bracket is further provided with a cover body matching the driving motor, and at least a part of the driving motor is located on the cover body.

[0015] A vehicle-mounted refrigerator includes a vehicle-mounted refrigerator main body and a drawer arranged on the vehicle-mounted refrigerator main body. The vehicle-mounted refrigerator main body is provided with the above-mentioned transmission mechanism with high coaxiality.

[0016] A transmission mechanism with high coaxiality and a vehicle-mounted refrigerator in the above embodiments. The transmission mechanism with high coaxiality includes a fixed bracket, a driving motor, and a transmission component. The transmission component includes a coupling and a transmission screw rod, and the axes of the driving motor, the coupling, and the transmission screw rod are coaxially arranged on the fixed bracket. Specifically, the output shaft of the driving motor, the coupling, and the transmission screw rod are coaxially arranged on the fixed bracket, effectively solving the concentricity problem in the prior art, reducing the centrifugal motion caused by non-concentricity, thereby reducing vibration and noise, and improving the stability and comfort of the operation of the vehicle-mounted refrigerator. Description of the Drawings

[0017] The accompanying drawings, which form a part of this application, are used to provide a further understanding of the present utility model. The schematic embodiments and descriptions thereof of the present utility model are used to explain the present utility model and do not constitute an improper limitation of the present utility model.

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other accompanying drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 It is a schematic diagram of the overall structure of the transmission mechanism in an embodiment of the present utility model.

[0020] Figure 2 It is a sectional view of the overall structure of the transmission mechanism in an embodiment of the present utility model.

[0021] Figure 3 It is Figure 2 an enlarged view of part A in

[0022] Figure 4 It is Figure 2 an enlarged view of part B in

[0023] Figure 5 It is an exploded view of the overall structure of the transmission mechanism in an embodiment of the present utility model.

[0024] Figure 6 It is a schematic diagram of the structure of the transmission mechanism and the vehicle-mounted refrigerator in an embodiment of the present utility model. Detailed implementation manners

[0025] To make the above objects, features, and advantages of the present utility model more obvious and understandable, the following will describe the detailed implementation manners of the present utility model in conjunction with the accompanying drawings. Many specific details are set forth in the following description to fully understand the present utility model. However, the present utility model can be implemented in many other ways different from those described herein. Those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0026] As Figures 1-5 shown, a transmission mechanism and a vehicle-mounted refrigerator with high coaxiality are provided. The transmission mechanism with high coaxiality includes a fixed bracket 1, a driving motor 2, and a transmission component 3. The transmission component 3 includes a coupling 301 and a transmission screw 302. The axes of the driving motor 2, the coupling 301, and the transmission screw 302 are coaxially arranged on the fixed bracket 1.

[0027] Specifically, the output shaft of the drive motor 2, the coupling 301, and the transmission screw 302 are coaxially arranged on the fixed bracket 1, effectively solving the concentricity problem in the prior art, reducing the centrifugal motion caused by non-concentricity, thereby reducing vibration and noise, and improving the stability and comfort of the in-vehicle refrigerator operation.

[0028] Furthermore, the fixed bracket 1 is at least integrally formed by nylon and fiberglass materials. The fixed bracket 1 is integrally formed using nylon + fiberglass materials, reducing the frictional resistance during sliding.

[0029] Furthermore, as Figures 2-5 shown, the axes of the drive motor 2 and the transmission screw 302 are coaxially arranged on the fixed bracket 1 through the coupling 301.

[0030] Specifically, the output shaft of the drive motor 2 is connected to the axis of the transmission screw 302 through the coupling 301, and it is ensured that the two are coaxially arranged on the fixed bracket 1, further improving the concentricity of the transmission mechanism.

[0031] Furthermore, the transmission screw 302 is at least formed by metal materials. Specifically, the transmission screw 302 is made of stainless steel 301, and its surface finish is controlled at 0.2 μm, which greatly reduces the frictional resistance; when the drive motor 2 rotates one circle, the lead of the rotating screw 302 is 4 mm, which can well control the relationship between the rotational speed and the stroke, and the magnitude of the rotational speed will affect the running noise.

[0032] Furthermore, as Figure 2 and Figure 3 shown, one end of the output shaft of the drive motor 2 is connected to one end of the coupling 301, and the other end of the coupling 301 is connected to one end of the transmission screw 302.

[0033] Specifically, through the coupling 301, the output shaft of the drive motor 2 is connected to the transmission screw 302, ensuring that during the power transmission process from the drive motor 2 to the transmission screw 302, the rotation axes of all components always remain consistent, thereby further reducing the mechanical vibration and noise problems that may be caused by the axis offset.

[0034] Furthermore, as Figure 2 and Figure 4 shown, the fixed bracket 1 is provided with a guiding portion 101 for installing the transmission screw 302, and a bushing 4 is provided on the guiding portion 101, and the other end of the transmission screw 302 is cooperatively connected to the bushing 4.

[0035] Specifically, with the above arrangement, additional guiding and support are provided, ensuring that the transmission screw 302 maintains a stable axis position during rotation, and avoiding any axial offset caused by installation errors or external forces during operation.

[0036] Furthermore, as Figure 5 shown, the axes of the output shaft of the drive motor 2, the coupling 301, the transmission screw 302, the bushing 4, and the bearing 5 are coaxially arranged on the fixed bracket 1.

[0037] Specifically, by adopting the above settings, high-precision alignment during power transmission is ensured, vibrations and noises caused by inconsistent axis lines are reduced, thereby improving the operating stability and use comfort of the vehicle-mounted refrigerator.

[0038] Furthermore, as Figure 5 shown, a positioning seat 1011 is provided on the guiding portion 101, and the bushing 4 is installed on the positioning seat 1011 by means of a snap or a screw.

[0039] Specifically, by means of a snap or a screw, the bushing 4 is firmly fixed on the positioning seat 1011 to ensure that it will not loosen or shift during use.

[0040] Furthermore, as Figure 3 shown, the transmission mechanism further includes a bearing 5, and the bearing 5 is sleeved on one end of the transmission screw 302.

[0041] Specifically, by sleeving a bearing 5 on one end of the transmission screw 302, the rotational stability of the transmission mechanism is significantly improved. When the transmission screw 302 rotates, the bearing 5 provides a low-friction rotational support to ensure that the transmission screw 302 can rotate smoothly in the fixed bracket 1 and the guiding portion 101.

[0042] Furthermore, as Figure 4 shown, the fixed bracket 1 is provided with a positioning portion 102 for installing the coupling 301 and the bearing 5.

[0043] Specifically, the coupling 301 is fixed through the positioning portion 102 to ensure that the connection between the output shaft of the drive motor 2 and the transmission screw 302 remains on the same axis.

[0044] Furthermore, as Figure 3 shown, the fixed bracket 1 is further provided with a housing 103 that matches the drive motor 2, and at least a part of the drive motor 2 is located on the housing 103.

[0045] Specifically, the housing 103 is installed on the fixed bracket 1, matching the outer dimensions and installation structure of the drive motor 2, ensuring that at least part of the drive motor 2 is covered by the housing 103, and can isolate a certain degree of noise generated by the drive motor 2 during operation.

[0046] As Figure 6As shown in the figure, a vehicle-mounted refrigerator includes a vehicle-mounted refrigerator main body 7 and a drawer 8 provided on the vehicle-mounted refrigerator main body 7. The vehicle-mounted refrigerator main body 7 is provided with the above-mentioned transmission mechanism with high coaxiality.

[0047] Specifically, the drive motor 2, the coupling 301, the transmission screw 302 and the shaft sleeve 4 are coaxially arranged on the fixed bracket 1, and then the fixed bracket 1 is installed on the vehicle-mounted refrigerator main body 7, so as to realize that the drive motor 2 drives the transmission screw 302 to rotate through the coupling 301, and the rotation of the transmission screw 302 enables the drawer 8 to drive the vehicle-mounted refrigerator main body 7 to move smoothly back and forth.

[0048] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention 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, and therefore should not be construed as a limitation to the present invention.

[0049] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0050] In the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0051] In the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.

[0052] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation.

[0053] It should also be understood that when interpreting the connection relationship or position relationship of elements, although not explicitly described, the connection relationship and position relationship are interpreted to include the error range, and this error range should be within the acceptable deviation range of a specific value determined by those skilled in the art. For example, "about", "approximately" or "substantially" can mean within one or more standard deviations, which are not defined herein.

[0054] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as falling within the scope described in this specification.

[0055] The above embodiments only represent several implementation manners of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. A transmission mechanism with high coaxiality, characterized in that: It comprises a fixed support (1), a drive motor (2) and a transmission assembly (3), wherein the transmission assembly (3) comprises a coupling (301) and a transmission screw (302), and the axes of the drive motor (2), the coupling (301) and the transmission screw (302) are coaxially arranged on the fixed support (1).

2. The transmission mechanism with high coaxiality according to claim 1, characterized in that: The axes of the drive motor (2) and the transmission screw (302) are coaxially arranged on the fixed bracket (1) via the coupling (301).

3. The transmission mechanism with high coaxiality according to claim 1, characterized in that: The output shaft of the driving motor (2) is connected to one end of the coupling (301), and the other end of the coupling (301) is connected to one end of the driving screw (302).

4. The transmission mechanism with high coaxiality according to claim 1, characterized in that: The fixed bracket (1) is provided with a guide portion (101) for mounting the transmission screw (302), the guide portion (101) is provided with a shaft sleeve (4), and the other end of the transmission screw (302) is cooperatively connected to the shaft sleeve (4).

5. The transmission mechanism with high coaxiality according to claim 4, characterized in that: The transmission mechanism further comprises a bearing (5), wherein the bearing (5) is sleeved on one end of the transmission screw rod (302).

6. The transmission mechanism with high coaxiality according to claim 5, characterized in that: The axes of the output shaft of the drive motor (2), the coupling (301), the transmission screw (302), the shaft sleeve (4) and the bearing (5) are coaxially arranged on the fixed bracket (1).

7. The transmission mechanism with high coaxiality according to claim 4, characterized in that: A positioning seat (1011) is provided on the guide portion (101), and the shaft sleeve (4) is mounted on the positioning seat (1011) by means of buckles or screws.

8. The transmission mechanism with high coaxiality according to claim 6, characterized in that: The fixed bracket (1) is provided with a positioning portion (102) for mounting the coupling (301) and the bearing (5).

9. The transmission mechanism with high coaxiality according to claim 1, characterized in that: The fixing bracket (1) is also provided with a cover body (103) matching the driving motor (2), and at least a part of the driving motor (2) is located on the cover body (103).

10. A vehicle refrigerator, comprising a vehicle refrigerator body (7) and a drawer (8) arranged on the vehicle refrigerator body (7), characterized in that: The vehicle refrigerator body (7) is provided with a transmission mechanism with high coaxiality as claimed in any one of claims 1 to 9.

Images