A heating and cooling air door crank

Abstract

This utility model discloses a heating / cooling damper crank, belonging to the field of automotive air conditioning parts. It includes a connecting crank with a first rotating hole and a second rotating hole inside. The inner wall of the first rotating hole has several equally spaced slots, and the first rotating hole engages with several elastic elements through these slots. A first rotating shaft is rotatably connected to the inner wall of the first rotating hole, and the outer wall of the first rotating shaft has several equally spaced connecting grooves. This heating / cooling damper crank, by incorporating the first rotating hole, elastic elements, and elastic plate, allows the crank to elastically fix the outer wall of the first rotating shaft during use through the outward expansion of the elastic elements and the inward contraction of the elastic plate. The two sets of opposing elasticities also buffer the first rotating shaft, preventing loosening during prolonged connection with the connecting crank and ensuring the stability of the connection between the connecting rod and the connecting crank.

Description

Technical Field

[0001] This utility model relates to the technical field of automotive air conditioning parts, specifically a hot and cold air damper crank. Background Technology

[0002] The air conditioning damper crank is a key mechanical component in automotive air conditioning systems used to adjust the mixing ratio of cold and hot air. It is mainly responsible for translating user operation commands (such as rotating the temperature knob or moving the lever) into the actual action of the damper, thereby controlling the ratio of cold air (from the evaporator) and warm air (from the heater core) entering the vehicle, and ultimately adjusting the outlet air temperature.

[0003] Existing automotive air conditioning systems typically use a crank and connecting rod to open and close the corresponding damper blades, thus achieving the effect of switching between hot and cold air. However, since the existing crank and connecting rod are rigidly connected during assembly without any buffering effect, the connecting rod is prone to loosening and causing abnormal noises during long-term use, which in turn makes it difficult for the crank and connecting rod to effectively adjust the opening and closing of the damper.

[0004] Therefore, this utility model provides a hot and cold air damper crank to solve the above problems. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] This utility model provides a hot and cold air damper crank, which aims to solve the problems mentioned in the background art.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a hot and cold air damper crank, including a connecting crank, wherein a first rotating hole and a second rotating hole are provided inside the connecting crank, a plurality of slots are provided at equal intervals on the inner wall of the first rotating hole, and the first rotating hole is engaged with a plurality of elastic elements through the plurality of slots, a first rotating shaft is rotatably connected to the inner wall of the first rotating hole, a plurality of connecting grooves are provided at equal intervals on the outer wall of the first rotating shaft, and a plurality of elastic plates are fixedly connected to one end of the connecting crank, and one end of each of the elastic plates is close to the center of the first rotating shaft.

[0009] As a preferred technical solution of this application, the inner wall of the second rotating hole is rotatably connected to a second rotating shaft, the inner wall of the second rotating hole is fixedly connected to a connecting key, and the interior of the second rotating shaft is provided with a keyway that matches the connecting key.

[0010] As a preferred technical solution of this application, one end of the connecting crank is fixedly connected with an anti-misalignment rib, one side of the elastic plate is set as an inclined surface, and the shape of the elastic plate is adapted to the shape of the connecting groove.

[0011] As a preferred technical solution of this application, the outer wall of the first rotating shaft is provided with a connecting plate, the inner wall of the connecting plate is provided with a guide groove, the outer wall of the first rotating shaft is movably connected to the inner wall of the guide groove, a fixed crank is fixedly connected to one side of the connecting plate, a plurality of eccentric shafts are rotatably connected to the inner wall of the fixed crank, the plurality of eccentric shafts are rotatably connected to the connecting rod through a connecting piece, and two arc-shaped plates are provided at one end of the fixed crank.

[0012] As a preferred technical solution of this application, a plurality of rotating rods are rotatably connected inside each of the two arc-shaped plates, and a connecting sleeve is provided on the outer wall of each of the two rotating rods. The outer wall of each of the two connecting sleeves is connected to the same air guide plate, and one end of the rotating rod passes through the arc-shaped plate and is connected to the corresponding end of the connecting rod.

[0013] As a preferred technical solution of this application, the end of the elastic member away from the first rotating hole is set as an arc surface, and the end of the elastic member away from the first rotating hole extends to the outside of the slot.

[0014] (III) Beneficial Effects

[0015] The hot and cold air damper crank, by setting a first rotating hole, elastic element, connecting groove and elastic plate, allows the outer wall of the first rotating shaft to be elastically fixed during use through the outward expansion elasticity of the elastic element and the inward contraction elasticity of the elastic plate. The two sets of opposite elasticity can also buffer the first rotating shaft, preventing the connection between the first rotating shaft and the connecting crank from becoming loose during long-term connection, thereby ensuring the stability of the connection between the connecting rod and the connecting crank of the first rotating shaft. Attached Figure Description

[0016] Figure 1 A schematic diagram of a hot and cold damper crank;

[0017] Figure 2 A schematic diagram of the structure of an explosion of the elastic element in a hot and cold damper crank;

[0018] Figure 3 A three-dimensional structural diagram of the air guide plate in a hot and cold damper crank;

[0019] Figure 4 This is a three-dimensional structural diagram of the connecting plate in a crank of a hot and cold damper.

[0020] In the picture:

[0021] 1. Connecting crank; 2. First rotating hole; 3. Second rotating hole; 4. First rotating shaft; 5. Elastic element; 6. Connecting groove; 7. Elastic plate; 8. Second rotating shaft; 9. Connecting key; 10. Keyway; 11. Anti-misalignment rib; 12. Connecting plate; 13. Guide groove; 14. Fixed crank; 15. Eccentric shaft; 16. Connecting piece; 17. Connecting rod; 18. Arc plate; 19. Rotating rod; 20. Connecting sleeve; 21. Air guide plate. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] like Figure 1-4 As shown, this utility model provides a hot and cold air damper crank, including a connecting crank 1. The connecting crank 1 has a first rotating hole 2 and a second rotating hole 3 inside. The inner wall of the first rotating hole 2 has a plurality of slots at equal intervals, and the first rotating hole 2 is engaged with a plurality of elastic elements 5 through the plurality of slots. The inner wall of the first rotating hole 2 is rotatably connected to a first rotating shaft 4. The outer wall of the first rotating shaft 4 has a plurality of connecting grooves 6 at equal intervals. One end of the connecting crank 1 is fixedly connected to a plurality of elastic plates 7, and one end of each elastic plate 7 is close to the center of the first rotating shaft 4.

[0024] The inner wall of the second rotating hole 3 is rotatably connected to the second rotating shaft 8, and the inner wall of the second rotating hole 3 is fixedly connected to the connecting key 9. The interior of the second rotating shaft 8 is provided with a keyway 10 that matches the connecting key 9. The connecting key 9 and the keyway 10 facilitate the connection between the second rotating shaft 8 and the second rotating hole 3. The connecting key 9 and the keyway 10 can limit the horizontal movement of the second rotating shaft 8 to prevent the second rotating shaft 8 from falling off the connecting crank 1.

[0025] One end of the connecting crank 1 is fixedly connected with an anti-misalignment rib 11. One side of the elastic plate 7 is set as an inclined surface. The shape of the elastic plate 7 is adapted to the shape of the connecting groove 6. By setting the anti-misalignment rib 11, the second rotating shaft 8 can only be assembled from one end of the connecting crank 1, thereby avoiding assembly errors during the assembly process that would affect the normal use of the crank.

[0026] A connecting plate 12 is provided on the outer wall of the first rotating shaft 4. A guide groove 13 is provided on the inner wall of the connecting plate 12. The outer wall of the first rotating shaft 4 is movably connected to the inner wall of the guide groove 13. A fixed crank 14 is fixedly connected to one side of the connecting plate 12. Several eccentric shafts 15 are rotatably connected to the inner wall of the fixed crank 14. The several eccentric shafts 15 are rotatably connected to the connecting rod 17 through connecting parts 16. Two arc-shaped plates 18 are provided at one end of the fixed crank 14. Several rotating rods 19 are rotatably connected in each of the two arc-shaped plates 18. A connecting sleeve 20 is provided on the outer wall of each of the two rotating rods 19. The outer wall is connected to the same air guide plate 21. One end of the rotating rod 19 passes through the arc plate 18 and is connected to the corresponding end of the connecting rod 17. By setting the connecting plate 12, the fixed crank 14, the eccentric shaft 15, the rotating rod 19 and the air guide plate 21, the crank drives the connecting plate 12 and the fixed crank 14 to perform eccentric motion through the connecting crank 1. This can drive multiple eccentric shafts 15 to swing at the same time, which can drive multiple rotating rods 19 to rotate at the same time. This allows for quick adjustment of the opening and closing angle of the air guide plate 21. Furthermore, the crank-connecting rod configuration allows for more stable adjustment of the air guide plate 21.

[0027] The end of the elastic element 5 away from the first rotating hole 2 is set as an arc surface, and the end of the elastic element 5 away from the first rotating hole 2 extends to the outside of the slot. By setting one end of the elastic element 5 as an arc surface, the arc surface of the elastic element 5 can fit against the outer wall of the first rotating shaft 4, so that the first rotating shaft 4 can be clamped and fixed more stably. Furthermore, by extending the elastic element 5 outward, when the first rotating shaft 4 is inserted into the first rotating hole 2, the elastic element 5 can be squeezed, thereby facilitating the elastic fixation of the first rotating shaft 4.

[0028] Working principle:

[0029] In use, when the first rotating shaft 4 and the second rotating shaft 8 need to be assembled with the connecting crank 1, due to the setting of the anti-misalignment rib 11, the second rotating shaft 8 can only be inserted into the second rotating hole 3 from one end of the connecting crank 1. The second rotating shaft 8 and the second rotating hole 3 are rotated and connected by the connecting key 9 and the keyway 10. Then, the elastic plate 7 is bent outward, so that the elastic plate 7 expands outward by its own elasticity. Then, the first rotating shaft 4 is inserted into the first rotating hole 2. During the process of the first rotating shaft 4 being inserted into the first rotating hole 2, the elastic element 5 will be squeezed, so that the elastic element 5 will contract. After the first rotating shaft 4 is inserted, the elastic element 5 will adjust by its own elasticity, so that the arc plate 18 of the elastic element 5 fits and clamps tightly with the outer wall of the first rotating shaft 4. Under the action of its own elastic force, the elastic plate 7 moves towards the center of the first rotating hole 2 and is embedded in the connecting groove 6 opened on the outer wall of the first rotating shaft 4. Thus, the first rotating shaft 4 and the second rotating shaft 8 can be assembled with the connecting crank 1.

[0030] When it is necessary to adjust the opening and closing angle of the air guide plate 21, the second rotating shaft 8 is driven to rotate by an external drive motor. The second rotating shaft 8 drives the connecting crank 1 to rotate, and the connecting crank 1 drives the first rotating shaft 4 to rotate. Since the connecting crank 1 is an eccentric wheel, the first rotating shaft 4 will drive the connecting plate 12 to make eccentric movements when it rotates, and slide along the guide groove 13 inside the connecting plate 12. The connecting plate 12 will drive the fixed crank 14 to swing, so that the fixed crank 14 drives the eccentric shaft 15 and the connecting part 16 to swing eccentrically, thereby driving the connecting rod 17 to rotate. The rotation of the connecting rod 17 drives the rotating rod 19 to rotate. The rotation of the rotating rod 19 can adjust the tilt angle of the air guide plate 21, thus completing the adjustment of the opening and closing angle of the air guide plate 21.

[0031] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A hot and cold air damper crank, comprising a connecting crank (1), characterized in that: The connecting crank (1) has a first rotating hole (2) and a second rotating hole (3) inside. The inner wall of the first rotating hole (2) has several slots at equal intervals, and the first rotating hole (2) is engaged with several elastic elements (5) through several slots. The inner wall of the first rotating hole (2) is rotatably connected to a first rotating shaft (4). The outer wall of the first rotating shaft (4) has several connecting grooves (6) at equal intervals. One end of the connecting crank (1) is fixedly connected to several elastic plates (7), and one end of each elastic plate (7) is close to the center of the first rotating shaft (4).

2. The hot and cold air damper crank according to claim 1, characterized in that: The inner wall of the second rotating hole (3) is rotatably connected to a second rotating shaft (8), and the inner wall of the second rotating hole (3) is fixedly connected to a connecting key (9). The interior of the second rotating shaft (8) is provided with a keyway (10) that matches the connecting key (9).

3. A hot and cold air damper crank according to claim 1, characterized in that: One end of the connecting crank (1) is fixedly connected to an anti-misalignment rib (11), one side of the elastic plate (7) is set as an inclined surface, and the shape of the elastic plate (7) is adapted to the shape of the connecting groove (6).

4. A hot and cold air damper crank according to claim 1, characterized in that: The outer wall of the first rotating shaft (4) is provided with a connecting plate (12), and the inner wall of the connecting plate (12) is provided with a guide groove (13). The outer wall of the first rotating shaft (4) is movably connected to the inner wall of the guide groove (13). A fixed crank (14) is fixedly connected to one side of the connecting plate (12). Several eccentric shafts (15) are rotatably connected to the inner wall of the fixed crank (14). Several eccentric shafts (15) are rotatably connected to the connecting rod (17) through a connecting piece (16). Two arc-shaped plates (18) are provided at one end of the fixed crank (14).

5. A hot and cold air damper crank according to claim 4, characterized in that: Each of the two arc-shaped plates (18) is rotatably connected to a number of rotating rods (19). A connecting sleeve (20) is provided on the outer wall of each of the two rotating rods (19). The outer wall of each of the two connecting sleeves (20) is connected to the same air guide plate (21). One end of the rotating rod (19) passes through the arc-shaped plate (18) and is connected to the corresponding end of the connecting rod (17).

6. A hot and cold air damper crank according to claim 1, characterized in that: The end of the elastic element (5) away from the first rotating hole (2) is set as an arc surface, and the end of the elastic element (5) away from the first rotating hole (2) extends to the outside of the slot.

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