Transmission crankshaft mounting structure

Abstract

The utility model provides a transmission crankshaft installation structure which is characterized in that the transmission crankshaft installation structure comprises an air outlet part, a crankshaft and a stepping motor, a through hole structure is arranged on the air outlet part, and the crankshaft and the stepping motor are assembled on the two sides of the through hole structure respectively; the through hole structure comprises a round hole and a notch protruding outwards in one position of the circumference of the round hole, and a limiting rib used for limiting the rotating angle of the crankshaft is arranged on the side, where the crankshaft is installed, of the air outlet part. The crankshaft comprises a connecting seat, the shape of the connecting seat is matched with that of the round hole so that the connecting seat can penetrate through the round hole, and the connecting seat is provided with a deep hole matched with a rotating shaft of the stepping motor, a convex rib extending outwards in the radial direction of the connecting seat and a convex ring for preventing the connecting seat from completely penetrating through the round hole; the convex rib penetrates through the notch and twists the crankshaft to enable the convex rib and the notch to be staggered in position, and the convex rib and the convex ring are matched to limit the crankshaft; a rotating shaft of the stepping motor is inserted into the deep hole to be connected with the crankshaft.

Description

Technical Field

[0001] The utility model belongs to the technical field of air conditioners, and in particular relates to a transmission crankshaft installation structure applied to a swing air guide vane of an air conditioner. Background Art

[0002] In order to achieve controllable airflow direction at the air outlet, the air conditioner is usually equipped with an air guide mechanism that can swing left and right or up and down on the air outlet. The stepper motor drives the swing of the air guide through the crankshaft and connecting rod. An insulating material sleeve part is usually added between the metal shaft of the stepper motor and the crankshaft to solve the problem that the metal shaft of the stepper motor is exposed and can be touched directly by hand after the crankshaft is removed from the air outlet part due to abnormal human factors, which is not in compliance with safety regulations. The added insulating material sleeve part only solves the safety problem that the stepper motor cannot be touched, but due to the increase in the number of parts, the assembly efficiency of the air conditioner will be reduced, the cost of parts will increase, and the necessary assembly dimensions will increase, resulting in an increase in the overall size of the air conditioner. Utility Model Content

[0003] The utility model proposes a transmission crankshaft installation structure, which is specifically implemented by the following technical means:

[0004] A transmission crankshaft installation structure comprises an air outlet part, a crankshaft and a stepper motor, wherein the air outlet part is provided with a through hole structure, and the crankshaft and the stepper motor are respectively assembled on both sides of the through hole structure;

[0005] The through hole structure includes a circular hole and a notch protruding outward at one circumference of the circular hole, and a limiting rib for limiting the rotation angle of the crankshaft is provided on one side of the air outlet part where the crankshaft is installed;

[0006] The crankshaft includes a connecting seat, the shape of which is adapted to the circular hole so that it can pass through the circular hole. The connecting seat is provided with a deep hole adapted to the rotating shaft of the stepper motor, a convex rib extending radially outward from the connecting seat, and a convex ring preventing the connecting seat from completely passing through the circular hole; the convex rib passes through the notch and twists the crankshaft so that the positions of the convex rib and the notch are staggered, and the convex rib and the convex ring cooperate to limit the crankshaft; the rotating shaft of the stepper motor is inserted through the deep hole to connect to the crankshaft.

[0007] Compared with the prior art, the advantages of the utility model are as follows: before installing the stepper motor, the crankshaft can be assembled to the air outlet part without the aid of tools, and is initially fixed after being twisted; after the stepper motor is installed, the crankshaft is locked and cannot be removed from the air outlet part without the aid of tools. This structure is simple and stable, with few parts (only two screws are needed to fix the motor), and is easy to disassemble and assemble. At the same time, since the crankshaft and the stepper motor shaft are directly assembled with the connecting seat, the insulating material sleeve parts are omitted, and safety regulations can be met, which is conducive to improving the assembly efficiency of the air conditioner and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of the combined structure of the transmission crankshaft installation structure.

[0009] Figure 2 This is a schematic diagram of the exploded structure of the transmission crankshaft mounting structure.

[0010] Figure 3 It is a schematic diagram of the assembly structure of the crankshaft and air outlet parts.

[0011] Figure 4 This is one of the schematic diagrams of the crankshaft structure.

[0012] Figure 5 This is the second schematic diagram of the crankshaft structure.

[0013] Figure 6 This is one of the assembly status views of the crankshaft and air outlet parts.

[0014] Figure 7 This is the second view of the assembly status of the crankshaft and air outlet parts.

[0015] Figure 8 This is the third view of the assembly status of the crankshaft and air outlet parts. DETAILED DESCRIPTION

[0016] The present application scheme is further described as follows in conjunction with the accompanying drawings:

[0017] See attached Figures 1 to 5 , a transmission crankshaft mounting structure is applied to the swing air guide plate structure of the air conditioner, specifically comprising an air outlet part 1, a crankshaft 2 and a stepper motor 3, wherein the air outlet part 1 is provided with a through hole structure 10, and the crankshaft 2 and the stepper motor 3 are respectively assembled on both sides of the through hole structure 10; the through hole structure 10 is a composite shape consisting of a circular hole 101 and a notch 102 protruding outward at a circumference of the circular hole 101, and a limiting rib 11 for limiting the rotation angle of the crankshaft 2 is provided on the side of the air outlet part 1 where the crankshaft 2 is mounted; a screw column 12 is provided on the side of the air outlet part 1 where the stepper motor 3 is mounted, and the stepper motor 3 is fixed to the air outlet by screws. The crankshaft 2 includes a connecting seat 21, a main shaft body 22 and a connecting arm 23 for connecting the main shaft body 22 and the connecting seat 21, and the connecting arm 23 is provided with a limiting portion 231 that cooperates with the limiting rib 11; the connecting seat 21 is cylindrical so that it can pass through the circular hole 101, and the connecting seat 21 is provided with a deep hole 210 adapted to the rotating shaft 31 of the stepping motor 3, a convex rib 211 extending radially outward from the connecting seat 21, and a convex ring 212 that prevents the connecting seat 21 from completely passing through the circular hole 101; at the same time, the end of the connecting seat 21 is provided with a chamfered structure 213, so that the connecting seat 21 can be more smoothly inserted into the through hole structure 10 of the air outlet part 1.

[0018] During assembly, the crankshaft 2 is tilted at a certain angle relative to the axial direction of the through-hole structure, and the rib 211 is first passed through the notch 102 (see attached). Figure 6 and 7 ), then twist the crankshaft 2 so that the rib 211 and the notch 102 are at the wrong positions, and then insert the connecting seat 21 into the through-hole structure 10, and finally the rib 211 and the convex ring 212 cooperate to limit the crankshaft 2 to prevent it from loosening, thus completing the initial fixation (see attached Figure 8 ); Subsequently, the rotating shaft 31 of the stepper motor 3 is inserted through the deep hole 210 to connect with the crankshaft 2, and the stepper motor 3 is fixed to the air outlet part 1 with screws, and the installation is completed. After the rotating shaft 31 of the stepper motor 3 is inserted into the deep hole 210 of the crankshaft 2, the crankshaft 2 can be driven by the stepper motor 3 to rotate, and the rotating shaft 31 and the rotation center axis of the deep hole 210 coincide with each other.

[0019] During disassembly, the stepper motor 3 must be removed first, and then the crankshaft 2 must be twisted until its rib 211 and the notch 102 are aligned, and the connecting seat 21 must be tilted so that the rotation center axis of the crankshaft 2 no longer coincides with the center axis of the through-hole structure 10. Only then can the crankshaft 2 be removed from the air outlet part 1.

[0020] Before installing the stepper motor, the crankshaft 2 can be assembled to the air outlet part 1 without the aid of tools, and initially fixed after twisting; after the stepper motor is installed, the crankshaft 2 is locked and cannot be removed from the air outlet part 1 without the aid of tools. This structure is simple and stable, with few parts (only two screws are needed to fix the stepper motor), and is easy to disassemble. At the same time, since the crankshaft 2 and the rotating shaft 31 of the stepper motor 3 are directly assembled with the connecting seat, the insulating material sleeve parts are omitted, and the safety regulations can be met, which is conducive to improving the assembly efficiency of the air conditioner and reducing costs. After the stepper motor 3 is fixed to the air outlet part 1, the crankshaft 1 can no longer be tilted, so the crankshaft 1 cannot be disassembled, which can avoid the safety problem of the stepper motor 3 being touched.

[0021] The above-mentioned preferred implementation modes should be regarded as illustrative examples of the implementation modes of the present application scheme. Any technical deductions, replacements, improvements, etc. that are identical or similar to the present application scheme or made based on this scheme should be regarded as within the scope of protection of this patent.

Claims

1. A transmission crankshaft mounting structure, characterized in that: It includes an air outlet part, a crankshaft and a stepper motor, wherein the air outlet part is provided with a through hole structure, and the crankshaft and the stepper motor are respectively assembled on both sides of the through hole structure; The through hole structure includes a circular hole and a notch protruding outward at one circumference of the circular hole, and a limiting rib for limiting the rotation angle of the crankshaft is provided on one side of the air outlet part where the crankshaft is installed; The crankshaft includes a connecting seat, the shape of which is adapted to the circular hole so that it can pass through the circular hole. The connecting seat is provided with a deep hole adapted to the rotating shaft of the stepper motor, a convex rib extending radially outward from the connecting seat, and a convex ring preventing the connecting seat from completely passing through the circular hole; the convex rib passes through the notch and twists the crankshaft so that the positions of the convex rib and the notch are staggered, and the convex rib and the convex ring cooperate to limit the crankshaft; the rotating shaft of the stepper motor is inserted through the deep hole to connect to the crankshaft.

2. The transmission crankshaft mounting structure according to claim 1, characterized in that: The end of the connecting seat is provided with a chamfered structure.

3. The transmission crankshaft mounting structure according to claim 1, characterized in that: A screw column is provided on one side of the air outlet part for mounting the stepper motor, and the stepper motor is fixed to the air outlet part by means of the screw.

4. The transmission crankshaft mounting structure according to claim 1, characterized in that: The crankshaft comprises a main shaft body and a connecting arm used for connecting the main shaft body and a connecting seat, and a limiting portion cooperating with a limiting rib is provided on the connecting arm.

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