Output transmission mechanism and stepping motor assembly having the same

Abstract

The present application relates to an output transmission mechanism and a stepper motor assembly having the mechanism, and relates to the field of motors. The output transmission mechanism comprises: a housing; an input shaft, rotatably connected to the housing and one end of which extends into a cavity; a first output shaft, rotatably connected to the housing; a second output shaft, rotatably connected to the housing; a driving gear, sleeved on the input shaft; a driven gear, sleeved on the second output shaft and meshing with the driving gear, and the second output shaft rotates with the driven gear; a reversing gear, sleeved on the input shaft; an output gear, sleeved on the first output shaft to drive the first output shaft to rotate; a same-direction gear set, so that the output gear rotates in the same direction as the driving gear; a reverse gear set, so that the output gear rotates in the reverse direction with the reversing gear; a first clutch assembly; and a second clutch assembly. The present application has the effect of realizing that a stepper motor provides two powers for a circulating fan, reducing the production cost of the circulating fan and saving energy.

Description

Technical Field

[0001] The present application relates to the field of motors, and in particular to an output transmission mechanism and a stepper motor assembly having the mechanism. Background Art

[0002] A stepper motor is an electric motor that converts an electrical pulse signal into a corresponding angular displacement or linear displacement. As the power source of a circulating fan, a stepper motor is used to drive the circulating fan to work.

[0003] For example, a Chinese patent with authorization announcement number CN207064293U discloses an air circulation fan, which is powered by two stepper motors, one of which is used to provide power to the fan blades of the fan head to drive the fan blades to rotate and supply air, and the other is used to provide power to the fan head to drive the fan head to swing around a vertical axis to change the direction of the fan head.

[0004] With respect to the above-mentioned related technologies, the inventor believes that the use of two stepper motors to provide power for the circulation fan results in a high production cost of the circulation fan, and there is still room for improvement. Summary of the invention

[0005] In order to realize that one stepper motor provides two power sources for a circulating fan, reduce the production cost of the circulating fan, and save energy, the present application provides an output transmission mechanism and a stepper motor assembly having the mechanism.

[0006] In a first aspect, the present application provides an output transmission mechanism, which adopts the following technical solution:

[0007] An output transmission mechanism, comprising:

[0008] A housing having a cavity;

[0009] An input shaft, rotatably connected to the housing and having one end extending into the cavity;

[0010] A first output shaft, rotatably connected to the housing;

[0011] A second output shaft, rotatably connected to the housing;

[0012] A driving gear, sleeved on the input shaft;

[0013] A driven gear, sleeved on the second output shaft and meshing with the driving gear, the second output shaft rotates with the driven gear;

[0014] A reversing gear, sleeved on the input shaft;

[0015] An output gear, sleeved on the first output shaft, to drive the first output shaft to rotate;

[0016] A co-directional gear set, which transmission-connects the driving gear and the output gear, so that the output gear and the driving gear rotate in the same direction;

[0017] A reverse gear set, which drives and connects the reversing gear with the output gear, so that the output gear and the reversing gear rotate in opposite directions;

[0018] a first clutch assembly, so that when the input shaft rotates along a first circumferential direction, the driving gear rotates with the input shaft; when the input shaft rotates in a direction opposite to the first circumferential direction, the driving gear is rotationally connected to the input shaft; and

[0019] The second clutch assembly ensures that when the input shaft rotates along a first circumferential direction, the reversing gear is rotationally connected with the input shaft; when the input shaft rotates along a direction opposite to the first circumferential direction, the reversing gear rotates with the input shaft.

[0020] By adopting the above technical solution, when the output shaft of the stepper motor drives the input shaft to rotate along the first circumferential direction, the first clutch assembly makes the driving gear rotate synchronously with the input shaft, the second clutch assembly makes the reversing gear stationary, the driving gear drives the second output shaft to rotate by mutual meshing with the driven gear, the driving gear drives the first output shaft to rotate along the first circumferential direction by the same-direction gear set and the output gear, the first output shaft is used to drive the fan blades to rotate, and the second output shaft is used to drive the fan head to swing around the vertical axis, so that one stepper motor can drive the fan blades to rotate and drive the fan head to swing around the vertical axis at the same time. When the output shaft of the stepper motor drives the input shaft to rotate in the direction opposite to the first circumferential direction, the first clutch assembly makes the driving gear stationary, the second clutch assembly makes the reversing gear rotate synchronously with the input shaft, the reversing gear drives the first output shaft to rotate along the first circumferential direction through the reverse gear set and the output gear, so that one stepper motor can drive the fan blades to rotate and drive the fan head not to swing around the vertical axis at the same time. It is achieved that one stepper motor can drive the circulating fan to work, reducing the production cost of the circulating fan and saving energy.

[0021] Optionally, the first clutch assembly includes:

[0022] A first pawl, wherein a first movable groove is provided on the outer peripheral wall of the input shaft, the first pawl is movably connected in the first movable groove, and the first pawl has a first engaging end;

[0023] A first retaining spring is embedded in the outer peripheral wall of the input shaft so that the first engaging end of the first pawl maintains a tendency to extend out of the first movable groove, and a first retaining groove for the first retaining spring to be embedded is provided on a side of the first pawl facing away from the input shaft; and

[0024] A first clutch sleeve is sleeved on the input shaft and fixed to the driving gear, wherein a plurality of first slots spaced apart along the circumferential direction are provided on the inner circumferential wall of the first clutch sleeve, and the first slots have a first guide surface;

[0025] When the input shaft rotates along the first circumferential direction, the first engaging end is engaged in the first engaging groove; when the input shaft rotates along the direction opposite to the first circumferential direction, the first guide surface drives the first engaging end to be received in the first movable groove.

[0026] By adopting the above technical solution, when the input shaft rotates along the first circumferential direction, the first clamping spring causes the first engaging end of the first pawl to extend out of the first movable groove and be embedded in the first clamping groove, so that the driving gear rotates with the input shaft at this time. When the input shaft rotates in the direction opposite to the first circumferential direction, the first guide surface guides the first engaging end of the first pawl to slide out of the first clamping groove and be received in the first movable groove, so that the driving gear does not rotate with the input shaft at this time.

[0027] Optionally, the second clutch assembly includes:

[0028] A second pawl, wherein a second movable groove is provided on the outer peripheral wall of the input shaft, the second pawl is movably connected in the second movable groove, and the second pawl has a second engaging end;

[0029] A second retaining spring is embedded in the outer peripheral wall of the input shaft so that the second engaging end of the second pawl maintains a tendency to extend out of the second movable groove, and a second retaining groove for the second retaining spring to be embedded is provided on a side of the second pawl facing away from the input shaft; and

[0030] A second clutch sleeve is sleeved on the input shaft and fixed to the reversing gear, a plurality of second clamping grooves spaced apart along the circumferential direction are provided on the inner circumferential wall of the second clutch sleeve, and the second clamping grooves have a second guide surface;

[0031] When the input shaft rotates along the first circumferential direction, the second guide surface drives the second engaging end to be received in the second movable groove; when the input shaft rotates along the direction opposite to the first circumferential direction, the second engaging end is engaged in the second engaging groove.

[0032] By adopting the above technical solution, when the input shaft rotates in the direction opposite to the first circumferential direction, the second clamping spring causes the second engaging end of the second pawl to extend out of the second movable groove and be engaged in the second clamping groove, so that the reversing gear rotates with the input shaft at this time. When the input shaft rotates in the first circumferential direction, the second guide surface guides the second engaging end of the second pawl to slide out of the second clamping groove and be received in the second movable groove, so that the reversing gear does not rotate with the input shaft at this time.

[0033] Optionally, the first clutch assembly includes:

[0034] A first clutch ring, sleeved on the input shaft and rotating with the input shaft;

[0035] first clutch teeth, arranged on the end surface of the first clutch ring close to the driving gear and spaced apart in the circumferential direction, the driving gear is provided with a first embedding groove for the first clutch teeth to be embedded, the first embedding groove having a first guiding surface; and

[0036] A first elastic member, sleeved on the input shaft, wherein the first elastic member enables the first clutch tooth to maintain a tendency to be inserted into the first embedding groove;

[0037] When the input shaft rotates along a first circumferential direction, the first clutch tooth is engaged in the first embedding groove; when the input shaft rotates along a direction opposite to the first circumferential direction, the first guide surface drives the first clutch tooth to slide out of the first embedding groove.

[0038] By adopting the above technical solution, when the input shaft rotates along the first circumferential direction, the first elastic member drives the first clutch tooth to be engaged in the first embedding groove, so that the driving gear rotates with the input shaft at this time. When the input shaft rotates in the direction opposite to the first circumferential direction, the first guide surface guides the first clutch tooth to slide out of the first embedding groove, so that the driving gear does not rotate with the input shaft at this time.

[0039] Optionally, the second clutch assembly includes:

[0040] A second clutch ring, sleeved on the input shaft and rotating with the input shaft;

[0041] Second clutch teeth are arranged on the end surface of the second clutch ring close to the reversing gear and are spaced apart in the circumferential direction. The reversing gear is provided with a second embedding groove for the second clutch teeth to be embedded. The second embedding groove has a second guiding surface; and

[0042] A second elastic member, sleeved on the input shaft, wherein the second elastic member enables the second clutch tooth to maintain a tendency to be inserted into the second embedding groove;

[0043] When the input shaft rotates along the first circumferential direction, the second guide surface drives the second clutch tooth to slide out of the second embedding groove; when the input shaft rotates along the direction opposite to the first circumferential direction, the second clutch tooth is engaged in the second embedding groove.

[0044] By adopting the above technical solution, when the input shaft rotates in the direction opposite to the first circumferential direction, the second elastic member drives the second clutch tooth to be engaged in the second embedding groove, so that the reversing gear rotates with the input shaft at this time. When the input shaft rotates in the first circumferential direction, the second guide surface guides the second clutch tooth to slide out of the second embedding groove, so that the reversing gear does not rotate with the input shaft at this time.

[0045] Optionally, the co-directional gear set comprises:

[0046] A co-directional transmission shaft, disposed in the cavity and rotatably connected to the housing;

[0047] A first co-directional gear, sleeved on the co-directional transmission shaft to drive the co-directional transmission shaft to rotate, the first co-directional gear and the driving gear meshing with each other; and

[0048] The second co-directional gear is sleeved on the co-directional transmission shaft and rotates along with the co-directional transmission shaft, and the second co-directional gear is meshed with the output gear.

[0049] By adopting the above technical solution, the output gear and the driving gear rotate in the same direction, thereby achieving the same direction rotation of the first output shaft and the output shaft of the stepper motor.

[0050] Optionally, the reverse gear set includes:

[0051] A reverse transmission shaft, disposed in the cavity and rotatably connected to the housing;

[0052] A first reverse gear, sleeved on the reverse transmission shaft to drive the reverse transmission shaft to rotate, the first reverse gear and the reversing gear meshing with each other;

[0053] A second reverse gear, sleeved on the reverse transmission shaft and rotating with the reverse transmission shaft; and

[0054] The third reverse gear is rotatably connected to the housing and meshes with the second reverse gear and the output gear.

[0055] By adopting the above technical solution, the output gear and the reversing gear rotate in opposite directions, thereby achieving the reverse rotation of the first output shaft and the output shaft of the stepper motor.

[0056] Optionally, a rotating shaft is provided on the side of the third reverse gear facing away from the input shaft, and the rotating shaft rotates synchronously with the third reverse gear. The rotating shaft passes through the shell, and two axial load bearings are sleeved on the rotating shaft. The two axial load bearings are clamped on both sides of the side wall of the shell, and a limit piece is provided at the end of the rotating shaft extending out of the shell, and the limit piece forces the axial load bearing to press the shell.

[0057] By adopting the above technical solution, the third reverse gear is rotatably connected to the housing, so that the third reverse gear is fixed relative to the housing in the axial direction.

[0058] Optionally, the first output shaft is concentrically arranged with the input shaft, and the end of the input shaft facing the first output shaft is rotatably connected to the first output shaft via a bearing.

[0059] By adopting the above technical solution, the input shaft and the first output shaft provide support to each other, so that the input shaft and the first output shaft are not prone to shaking during rotation, thereby improving the stability of the input shaft and the first output shaft during rotation.

[0060] In a second aspect, the present application provides a stepper motor assembly, which adopts the following technical solution:

[0061] A stepper motor assembly, comprising:

[0062] stepper motors; and

[0063] In the output transmission mechanism as described above, the stepper motor is detachably connected to the housing, and the output shaft of the stepper motor drives the input shaft to rotate.

[0064] By adopting the above technical solution, when the output shaft of the stepper motor drives the input shaft to rotate along the first circumferential direction, the first clutch assembly makes the driving gear rotate synchronously with the input shaft, the second clutch assembly makes the reversing gear stationary, the driving gear drives the second output shaft to rotate by mutual meshing with the driven gear, the driving gear drives the first output shaft to rotate along the first circumferential direction by the same-direction gear set and the output gear, the first output shaft is used to drive the fan blades to rotate, and the second output shaft is used to drive the fan head to swing around the vertical axis, so that one stepper motor can drive the fan blades to rotate and drive the fan head to swing around the vertical axis at the same time. When the output shaft of the stepper motor drives the input shaft to rotate in the direction opposite to the first circumferential direction, the first clutch assembly makes the driving gear stationary, the second clutch assembly makes the reversing gear rotate synchronously with the input shaft, the reversing gear drives the first output shaft to rotate along the first circumferential direction through the reverse gear set and the output gear, so that one stepper motor can drive the fan blades to rotate and drive the fan head not to swing around the vertical axis at the same time. It is achieved that one stepper motor can drive the circulating fan to work, reducing the production cost of the circulating fan and saving energy.

[0065] In summary, the present application includes at least one of the following beneficial technical effects:

[0066] One stepper motor can drive the fan blades to rotate and drive the fan head to swing around the vertical axis at the same time; one stepper motor can drive the fan blades to rotate and drive the fan head not to swing around the vertical axis at the same time; one stepper motor can drive the circulating fan to work, thereby reducing the production cost of the circulating fan and saving energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] Figure 1 This is a top view of a stepper motor assembly of Example 1 of the present application.

[0068] Figure 2 yes Figure 1 Sectional view along AA direction.

[0069] Figure 3 It is an exploded schematic diagram of the first clutch assembly, the second clutch assembly and the input shaft of Example 1 of the present application.

[0070] Figure 4 yes Figure 3 Enlarged view of part B in the middle.

[0071] Figure 5 yes Figure 1 Sectional view along CC direction.

[0072] Figure 6 It is an exploded schematic diagram of the same-direction gear set, the reverse gear set and the lower shell of Example 1 of the present application.

[0073] Figure 7 It is an exploded schematic diagram of the first clutch assembly, the second clutch assembly and the input shaft of Example 2 of the present application.

[0074] Explanation of reference numerals: 10, housing; 11, upper housing; 12, lower housing; 13, cavity; 20, input shaft; 21, first movable groove; 22, second movable groove; 23, stabilizing shaft; 24, third retaining spring; 25, fourth retaining spring; 30, first output shaft; 31, rotating groove; 40, second output shaft; 50, driving gear; 51, first embedded groove; 511, first guide surface; 60, driven gear; 70, reversing gear; 71, second embedded groove; 711, second guide surface; 80, output gear; 90, same-direction gear set; 91, same-direction transmission shaft; 92, first same-direction gear; 93, second same-direction gear; 110, reverse gear set; 111, reverse transmission shaft; 112, first reverse gear; 113, second reverse gear; 114, third reverse gear; 1141, rotating shaft; 1142, axial load bearing; 1143, limit member; 120, first clutch assembly; 121, first ratchet; 1211, first bite end; 122, first retaining spring; 1212, first embedding groove; 123, first clutch sleeve; 1231, first embedding groove; 1232, first guide surface; 124, first clutch ring; 125, first clutch tooth; 126, first elastic member; 130, second clutch assembly; 131, second ratchet; 1311, second bite end; 132, second retaining spring; 1312, second embedding groove; 133, second clutch sleeve; 1331, second embedding groove; 1332, second guide surface; 134, second clutch ring; 135, second clutch tooth; 136, second elastic member; 140, stepping motor. DETAILED DESCRIPTION

[0075] The following is combined with Figure 1-7 This application is described in further detail.

[0076] The embodiment of the present application discloses a stepper motor 140 assembly.

[0077] Example 1

[0078] Reference Figure 1 and Figure 2 The stepper motor assembly includes a stepper motor 140 and an output transmission mechanism. The output transmission mechanism includes a housing 10, an input shaft 20, a first output shaft 30, a second output shaft 40, a driving gear 50, a driven gear 60, a reversing gear 70, an output gear 80, a co-directional gear set 90, a reverse gear set 110, a first clutch assembly 120, and a second clutch assembly 130. The stepper motor 140 is fixed to the housing 10, and the output shaft of the stepper motor 140 is connected to the input shaft 20 to drive the input shaft 20 to rotate.

[0079] The shell 10 includes an upper shell 11 and a lower shell 12. The upper shell 11 is disc-shaped, and the lower shell 12 is barrel-shaped with one end open. The upper shell 11 is fixed to the upper side of the lower shell 12 to cover the opening of the lower shell 12. The upper shell 11 and the lower shell 12 cooperate to form a cavity 13.

[0080] The input shaft 20 is rotatably connected to the upper shell 11 via a bearing. The lower end of the input shaft 20 extends into the cavity 13 , and the input shaft 20 is stationary relative to the upper shell 11 along the axial direction.

[0081] The first output shaft 30 is rotatably connected to the lower shell 12 through a bearing, and the first output shaft 30 is stationary relative to the lower shell 12 in the axial direction. The first output shaft 30 is concentrically arranged with the input shaft 20, and the first output shaft 30 is located at the lower side of the input shaft 20. A stabilizing shaft 23 is fixed to the lower end of the input shaft 20, and the stabilizing shaft 23 is concentrically arranged with the input shaft 20. A rotation groove 31 is opened at the upper end of the first output shaft 30, and the stabilizing shaft 23 is inserted into the rotation groove 31 and is rotatably connected to the first output shaft 30 through a bearing.

[0082] The second output shaft 40 is rotatably connected to the upper shell 11 and the lower shell 12 through a bearing, the second output shaft 40 is stationary relative to the upper shell 11 and the lower shell 12 in the axial direction, and the second output shaft 40 is parallel to the first output shaft 30. The driven gear 60 is sleeved on the second output shaft 40, the driven gear 60 and the second output shaft 40 are concentrically arranged, and the driven gear 60 is fixedly connected to the second output shaft 40, and the driven gear 60 here is a spur gear.

[0083] Reference Figure 2 and Figure 3 The driving gear 50 is sleeved on the input shaft 20, the driving gear 50 and the input shaft 20 are concentrically arranged, the driving gear 50 and the input shaft 20 are rotationally connected, and the driving gear 50 and the driven gear 60 are meshed with each other. A third retaining spring 24 is embedded on the input shaft 20, and the third retaining spring 24 abuts against the lower side of the driving gear 50, so that the driving gear 50 is not easy to slide downward relative to the input shaft 20.

[0084] The direction indicated by arrow x is the first circumferential direction. The first clutch assembly 120 allows the driving gear 50 to rotate synchronously with the input shaft 20 when the input shaft 20 rotates along the first circumferential direction; and allows the driving gear 50 to not rotate with the input shaft 20 when the input shaft 20 rotates in a direction opposite to the first circumferential direction.

[0085] Reference Figure 3 and Figure 4 The first clutch assembly 120 includes a first pawl 121, a first retaining spring 122 and a first clutch sleeve 123. There are multiple first pawls 121, and the first pawls 121 are in the shape of a Tai Chi fish. The multiple first pawls 121 are evenly distributed along the circumference of the input shaft 20. The tip of the first pawl 121 is the first bite end 1211, and the direction of the first bite end 1211 is the same as the direction indicated by the arrow x. A first movable groove 21 is provided on the outer peripheral wall of the input shaft 20. The first movable groove 21 corresponds to the first pawl 121 one by one. The first pawl 121 is movably connected to the first movable groove 21, so that the first bite end 1211 can swing around an axis parallel to the input shaft 20 to extend out of the first movable groove 21 or be received in the first movable groove 21. The first retaining spring 122 is embedded in the outer peripheral wall of the input shaft 20, and a first retaining groove 1212 is provided on the side wall of the first pawl 121 facing away from the axis of the input shaft 20. The first retaining spring 122 is partially embedded in the first retaining groove 1212, so that the first engaging end 1211 maintains a tendency to extend out of the first movable groove 21. The first clutch sleeve 123 is fixed to the upper end of the driving gear 50, and the first clutch sleeve 123 is sleeved on the input shaft 20 and is concentrically arranged with the driving gear 50. A plurality of first retaining grooves 1231 are provided on the inner peripheral wall of the first clutch sleeve 123, and the plurality of first retaining grooves 1231 are uniformly arranged along the circumferential direction. The first retaining groove 1231 has a first guide surface 1232, and the first guide surface 1232 gradually moves away from the axis of the first clutch sleeve 123 along the first circumferential direction.

[0086] When the input shaft 20 rotates along the first circumferential direction, the first engaging end 1211 is engaged in the first engaging groove 1231, so that the driving gear 50 rotates synchronously with the input shaft 20. When the input shaft 20 rotates in the direction opposite to the first circumferential direction, the first guide surface 1232 drives the first engaging end 1211 to be received in the first movable groove 21, so that the driving gear 50 does not rotate with the input shaft 20.

[0087] The reversing gear 70 is sleeved on the input shaft 20, the reversing gear 70 and the input shaft 20 are concentrically arranged, the reversing gear 70 and the input shaft 20 are rotationally connected, and the reversing gear 70 is located at the lower side of the driving gear 50. A fourth clamping spring 25 is embedded on the input shaft 20, and the fourth clamping spring 25 abuts against the lower side of the reversing gear 70, so that the reversing gear 70 is not easy to slide downward relative to the input shaft 20.

[0088] The second clutch assembly 130 ensures that when the input shaft 20 rotates in a first circumferential direction, the reversing gear 70 does not rotate with the input shaft 20 ; and when the input shaft 20 rotates in a direction opposite to the first circumferential direction, the reversing gear 70 rotates with the input shaft 20 .

[0089] The second clutch assembly 130 includes a second pawl 131, a second retaining spring 132 and a second clutch sleeve 133. There are multiple second pawls 131, which are in the shape of a Tai Chi fish. Multiple second pawls 131 are evenly distributed along the circumference of the input shaft 20. The tip of the second pawl 131 is the second bite end 1311, and the direction of the second bite end 1311 is opposite to the direction indicated by the arrow x. A second movable groove 22 is provided on the outer peripheral wall of the input shaft 20. The second movable groove 22 corresponds to the second pawl 131 one by one. The second pawl 131 is movably connected to the second movable groove 22, so that the second bite end 1311 can swing around an axis parallel to the input shaft 20 to extend out of the second movable groove 22 or be stored in the second movable groove 22. The second clamping spring 132 is embedded in the outer peripheral wall of the input shaft 20, and a second clamping groove 1312 is provided on the side wall of the second pawl 131 facing away from the axis of the input shaft 20. The second clamping spring 132 is partially embedded in the second clamping groove 1312, so that the second engaging end 1311 maintains a tendency to extend out of the second movable groove 22. The second clutch sleeve 133 is fixed to the upper end of the reversing gear 70. The second clutch sleeve 133 is sleeved on the input shaft 20 and is concentrically arranged with the reversing gear 70. A plurality of second clamping grooves 1331 are provided on the inner peripheral wall of the second clutch sleeve 133. The plurality of second clamping grooves 1331 are uniformly arranged along the circumferential direction. The second clamping groove 1331 has a second guide surface 1332. The second guide surface 1332 gradually moves away from the axis of the second clutch sleeve 133 along the second circumferential direction.

[0090] When the input shaft 20 rotates along the first circumferential direction, the second guide surface 1332 drives the second engaging end 1311 to be received in the second movable groove 22, so that the reversing gear 70 is rotationally connected to the input shaft 20. When the input shaft 20 rotates in the direction opposite to the first circumferential direction, the second engaging end 1311 is engaged in the second engaging groove 1331, so that the reversing gear 70 rotates synchronously with the input shaft 20.

[0091] Reference Figure 5 and Figure 6The same-direction gear set 90 drives the driving gear 50 and the output gear 80 so that when the input shaft 20 rotates along the first circumferential direction, the output gear 80 rotates in the same direction as the driving gear 50. The same-direction gear set 90 includes a same-direction transmission shaft 91, a first same-direction gear 92 and a second same-direction gear 93. The same-direction transmission shaft 91 is arranged in the cavity 13, the upper end of the same-direction transmission shaft 91 is rotatably connected to the upper shell 11 through a bearing, the lower end of the same-direction transmission shaft 91 is rotatably connected to the lower shell 12 through a bearing, and the same-direction transmission shaft 91 is stationary relative to the housing 10 in the axial direction. The first same-direction gear 92 is sleeved on the same-direction transmission shaft 91, the first same-direction gear 92 is concentrically arranged with the same-direction transmission shaft 91, the first same-direction gear 92 is fixedly connected with the same-direction transmission shaft 91, and the first same-direction gear 92 is meshed with the driving gear 50. The second co-directional gear 93 is sleeved on the co-directional transmission shaft 91. The second co-directional gear 93 is located at the lower side of the first co-directional gear 92. The second co-directional gear 93 is concentrically arranged with the co-directional transmission shaft 91. The second co-directional gear 93 is fixedly connected with the co-directional transmission shaft 91. The second co-directional gear 93 is meshed with the output gear 80.

[0092] The reverse gear set 110 drives the reversing gear 70 and the output gear 80 so that when the input shaft 20 rotates in the direction opposite to the first circumferential direction, the output gear 80 rotates in the opposite direction to the reversing gear 70. The reverse gear set 110 includes a reverse transmission shaft 111, a first reverse gear 112, a second reverse gear 113 and a third reverse gear 114. The reverse transmission shaft 111 is disposed in the cavity 13, the upper end of the reverse transmission shaft 111 is rotatably connected to the upper shell 11 through a bearing, and the lower end of the reverse transmission shaft 111 is rotatably connected to the lower shell 12 through a bearing. The first reverse gear 112 is sleeved on the reverse transmission shaft 111, the first reverse gear 112 is concentrically arranged with the reverse transmission shaft 111, the first reverse gear 112 is fixedly connected with the reverse transmission shaft 111, and the first reverse gear 112 is meshed with the reversing gear 70. The second reverse gear 113 is sleeved on the reverse transmission shaft 111 . The second reverse gear 113 is located at the lower side of the first reverse gear 112 . The second reverse gear 113 and the reverse transmission shaft 111 are concentrically arranged. The second reverse gear 113 and the reverse transmission shaft 111 are fixedly connected.

[0093] The third reverse gear 114 is rotatably connected to the lower shell 12, and the third reverse gear 114 meshes with the second reverse gear 113 and the driving gear. Specifically, a rotating shaft 1141 is fixed to the lower side of the third reverse gear 114, and the rotating shaft 1141 is concentrically arranged with the third reverse gear 114, and the lower end of the rotating shaft 1141 penetrates the lower shell 12 and extends out of the cavity 13. Two axial load bearings 1142 are sleeved on the rotating shaft 1141, and the axial load bearings 1142 can be thrust ball bearings or tapered roller bearings. In this embodiment, the axial load bearings 1142 are introduced by taking thrust ball bearings as an example. The two axial load bearings 1142 are respectively abutted against the two sides of the bottom plate of the lower shell 12, and the two ends of the upper axial load bearing 1142 are respectively abutted against the third reverse gear 114 and the bottom plate of the lower shell 12. A limit member 1143 is also provided on the rotating shaft 1141. The limit member 1143 may be a nut or a retaining spring. In this embodiment, the limit member 1143 is introduced taking a nut as an example. The limit member 1143 abuts against the lower end of the lower axial load bearing 1142 so that the lower axial load bearing 1142 remains in abutment with the lower shell 12.

[0094] The implementation principle of Example 1 is as follows: when the output shaft of the stepper motor 140 drives the input shaft 20 to rotate along the first circumferential direction, the first clutch assembly 120 causes the driving gear 50 to rotate synchronously with the input shaft 20, and the second clutch assembly 130 causes the reversing gear 70 to remain stationary. The driving gear 50 drives the second output shaft 40 to rotate by mutual engagement with the driven gear 60, and the driving gear 50 drives the first output shaft 30 to rotate along the first circumferential direction by the same-direction gear set 90 and the output gear 80. The first output shaft 30 is used to drive the fan blades to rotate, and the second output shaft 40 is used to drive the fan head to swing around the vertical axis, so that one stepper motor 140 can drive the fan blades to rotate and drive the fan head to swing around the vertical axis at the same time. When the output shaft of the stepper motor 140 drives the input shaft 20 to rotate in the direction opposite to the first circumferential direction, the first clutch assembly 120 makes the driving gear 50 stationary, and the second clutch assembly 130 makes the reversing gear 70 rotate synchronously with the input shaft 20. The reversing gear 70 drives the first output shaft 30 to rotate in the first circumferential direction through the reverse gear set 110 and the output gear 80, so that one stepper motor 140 can drive the fan blades to rotate and drive the fan head not to swing around the vertical axis at the same time. It is achieved that one stepper motor 140 can drive the circulating fan to work, reducing the production cost of the circulating fan and saving energy.

[0095] Example 2

[0096] Reference Figure 7 The difference between this embodiment and embodiment 1 is that the first clutch assembly 120 includes a first clutch ring 124 , a first clutch tooth 125 and a first elastic member 126 .

[0097] The first clutch ring 124 is sleeved on the input shaft 20, and the first clutch ring 124 and the input shaft 20 are concentrically arranged, and the first clutch ring 124 and the input shaft 20 are fixedly connected. There are multiple first clutch teeth 125 fixed on the lower end surface of the first clutch ring 124, and the multiple first clutch teeth 125 are evenly arranged along the circumference of the first clutch ring 124. A first embedding groove 51 is opened on the upper end surface of the driving gear 50, and the first embedding groove 51 corresponds to and matches the first clutch teeth 125 one by one. The first clutch teeth 125 are right-angle teeth, and a straight surface of the first clutch teeth 125 coincides with the lower end surface of the first clutch ring 124. The straight surface is one of the two right-angle surfaces of the right-angle teeth. The inclined surface of the first clutch teeth 125 is the first guide surface 511, and the first guide surface 511 gradually extends downward in the direction indicated by the arrow x. The first elastic member 126 is a compression spring, which is sleeved on the input shaft 20. The upper end of the first elastic member 126 abuts against the lower side of the upper shell 11, and the lower end of the first elastic member 126 abuts against the upper end surface of the first clutch ring 124, so that the first clutch tooth 125 maintains a tendency to be inserted into the first embedding groove 51.

[0098] When the input shaft 20 rotates along the first circumferential direction, the first clutch tooth 125 is embedded in the first embedding groove 51, so that the driving gear 50 rotates synchronously with the input shaft 20; when the input shaft 20 rotates in the direction opposite to the first circumferential direction, the first guide surface 511 drives the first clutch tooth 125 to slide out of the first embedding groove 51, and the driving gear 50 does not rotate with the input shaft 20.

[0099] Example 3

[0100] Reference Figure 7 The difference between this embodiment and embodiment 1 is that the second clutch assembly 130 includes a second clutch ring 134 , a second clutch tooth 135 and a second elastic member 136 .

[0101] The second clutch ring 134 is sleeved on the input shaft 20, and the second clutch ring 134 and the input shaft 20 are concentrically arranged, and the second clutch ring 134 and the input shaft 20 are fixedly connected. There are multiple second clutch teeth 135 fixed on the lower end surface of the second clutch ring 134, and the multiple second clutch teeth 135 are evenly arranged along the circumference of the second clutch ring 134. A second embedding groove 71 is opened on the upper end surface of the reversing gear 70, and the second embedding groove 71 corresponds to and matches the second clutch teeth 135 one by one. The second clutch teeth 135 are right-angle teeth, and a straight surface of the second clutch teeth 135 coincides with the lower end surface of the second clutch ring 134. The straight surface is one of the two right-angle surfaces of the right-angle teeth. The inclined surface of the second clutch teeth 135 is the second guide surface 711, and the second guide surface 711 gradually extends upward along the direction indicated by the arrow x. The second elastic member 136 is a compression spring, which is sleeved on the input shaft 20. The upper end of the second elastic member 136 abuts against the lower side of the first retaining spring 122, and the lower end of the second elastic member 136 abuts against the upper end surface of the second clutch ring 134, so that the second clutch tooth 135 maintains a tendency to be inserted into the second embedding groove 71.

[0102] When the input shaft 20 rotates along the first circumferential direction, the second guide surface 711 drives the second clutch tooth 135 to slide out of the second embedding groove 71, and the reversing gear 70 does not rotate with the input shaft 20; when the input shaft 20 rotates in the direction opposite to the first circumferential direction, the second clutch tooth 135 is embedded in the second embedding groove 71, so that the reversing gear 70 rotates synchronously with the input shaft 20.

[0103] Example 4

[0104] The difference between this embodiment and the first embodiment is that the first clutch assembly 120 is the first clutch assembly 120 in the second embodiment, and the second clutch assembly 130 is the second clutch assembly 130 in the third embodiment.

[0105] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An output transmission mechanism, characterized in that: include: The housing (10) has a cavity (13); An input shaft (20) rotatably connected to the housing (10) and having one end extending into the cavity (13); A first output shaft (30) rotatably connected to the housing (10); A second output shaft (40) rotatably connected to the housing (10); A driving gear (50) sleeved on the input shaft (20); A driven gear (60) is sleeved on the second output shaft (40) and meshes with the driving gear (50), and the second output shaft (40) rotates along with the driven gear (60); A reversing gear (70) sleeved on the input shaft (20); An output gear (80) sleeved on the first output shaft (30) to drive the first output shaft (30) to rotate; a co-directional gear set (90) for transmission connection between the driving gear (50) and the output gear (80), so that the output gear (80) and the driving gear (50) rotate in the same direction; a reverse gear set (110) for drivingly connecting the reversing gear (70) and the output gear (80) so that the output gear (80) and the reversing gear (70) rotate in opposite directions; A first clutch assembly (120) is configured such that when the input shaft (20) rotates in a first circumferential direction, the driving gear (50) rotates along with the input shaft (20); when the input shaft (20) rotates in a direction opposite to the first circumferential direction, the driving gear (50) is rotationally connected to the input shaft (20); as well as The second clutch assembly (130) is configured such that when the input shaft (20) rotates in a first circumferential direction, the reversing gear (70) is rotationally connected to the input shaft (20); and when the input shaft (20) rotates in a direction opposite to the first circumferential direction, the reversing gear (70) rotates along with the input shaft (20).

2. The output transmission mechanism according to claim 1, characterized in that: The first clutch assembly (120) comprises: A first ratchet pawl (121), wherein a first movable groove (21) is provided on the outer peripheral wall of the input shaft (20), the first ratchet pawl (121) is movably connected to the first movable groove (21), and the first ratchet pawl (121) has a first engaging end (1211); a first clamping spring (122) which is embedded in the outer peripheral wall of the input shaft (20) so that the first engaging end (1211) of the first pawl (121) maintains a tendency to extend out of the first movable groove (21); a first embedding groove (1212) for embedding the first clamping spring (122) is provided on a side of the first pawl (121) facing away from the input shaft (20); and A first clutch sleeve (123) is sleeved on the input shaft (20) and fixed to the driving gear (50); a plurality of first clamping grooves (1231) are arranged at intervals along the circumferential direction on the inner peripheral wall of the first clutch sleeve (123); the first clamping grooves (1231) have a first guide surface (1232); When the input shaft (20) rotates along a first circumferential direction, the first engaging end (1211) is engaged in the first engaging groove (1231); when the input shaft (20) rotates in a direction opposite to the first circumferential direction, the first guide surface (1232) drives the first engaging end (1211) to be received in the first movable groove (21).

3. The output transmission mechanism according to claim 1, characterized in that: The second clutch assembly (130) comprises: a second ratchet pawl (131), wherein a second movable groove (22) is provided on the outer peripheral wall of the input shaft (20), the second ratchet pawl (131) is movably connected to the second movable groove (22), and the second ratchet pawl (131) has a second engaging end (1311); a second retaining spring (132) which is embedded in the outer peripheral wall of the input shaft (20) so that the second engaging end (1311) of the second pawl (131) maintains a tendency to extend out of the second movable groove (22); a second retaining groove (1312) for the second retaining spring (132) to be embedded in the side of the second pawl (131) facing away from the input shaft (20); and a second clutch sleeve (133) sleeved on the input shaft (20) and fixed to the reversing gear (70); a plurality of second clamping grooves (1331) spaced apart along the circumferential direction are provided on the inner circumferential wall of the second clutch sleeve (133); the second clamping grooves (1331) have a second guide surface (1332); When the input shaft (20) rotates along a first circumferential direction, the second guide surface (1332) drives the second engaging end (1311) to be received in the second movable groove (22); when the input shaft (20) rotates along a direction opposite to the first circumferential direction, the second engaging end (1311) is engaged in the second engaging groove (1331).

4. The output transmission mechanism according to claim 1, characterized in that: The first clutch assembly (120) comprises: A first clutch ring (124) is sleeved on the input shaft (20) and rotates along with the input shaft (20); First clutch teeth (125) are arranged on the end surface of the first clutch ring (124) close to the driving gear (50) and are spaced apart in the circumferential direction; the driving gear (50) is provided with a first embedding groove (51) for the first clutch teeth (125) to be embedded; the first embedding groove (51) has a first guide surface (511); and a first elastic member (126) sleeved on the input shaft (20), the first elastic member (126) enabling the first clutch tooth (125) to maintain a tendency to be inserted into the first embedding groove (51); When the input shaft (20) rotates along a first circumferential direction, the first clutch tooth (125) is engaged in the first embedding groove (51); when the input shaft (20) rotates in a direction opposite to the first circumferential direction, the first guide surface (511) drives the first clutch tooth (125) to slide out of the first embedding groove (51).

5. The output transmission mechanism according to claim 1, characterized in that: The second clutch assembly (130) comprises: A second clutch ring (134) is sleeved on the input shaft (20) and rotates along with the input shaft (20); Second clutch teeth (135) are arranged on the end surface of the second clutch ring (134) close to the reversing gear (70) and are spaced apart in the circumferential direction; the reversing gear (70) is provided with a second embedding groove (71) for the second clutch teeth (135) to be embedded; the second embedding groove (71) has a second guide surface (711); and a second elastic member (136) sleeved on the input shaft (20), the second elastic member (136) enabling the second clutch tooth (135) to maintain a tendency to be inserted into the second embedding groove (71); When the input shaft (20) rotates along a first circumferential direction, the second guide surface (711) drives the second clutch tooth (135) to slide out of the second embedding groove (71); when the input shaft (20) rotates along a direction opposite to the first circumferential direction, the second clutch tooth (135) is embedded in the second embedding groove (71).

6. The output transmission mechanism according to claim 1, characterized in that: The co-directional gear set (90) comprises: A co-directional transmission shaft (91) disposed in the cavity (13) and rotatably connected to the housing (10); a first co-directional gear (92) sleeved on the co-directional transmission shaft (91) to drive the co-directional transmission shaft (91) to rotate, the first co-directional gear (92) and the driving gear (50) being meshed with each other; and The second co-directional gear (93) is sleeved on the co-directional transmission shaft (91) and rotates along with the co-directional transmission shaft (91); the second co-directional gear (93) and the output gear (80) are meshed with each other.

7. The output transmission mechanism according to claim 1, characterized in that: The reverse gear set (110) comprises: A reverse transmission shaft (111) is disposed in the cavity (13) and is rotationally connected to the housing (10); a first reverse gear (112) sleeved on the reverse transmission shaft (111) to drive the reverse transmission shaft (111) to rotate, the first reverse gear (112) and the reversing gear (70) being meshed with each other; a second reverse gear (113), sleeved on the reverse transmission shaft (111) and rotating along with the reverse transmission shaft (111); and The third reverse gear (114) is rotatably connected to the housing (10) and meshes with the second reverse gear (113) and the output gear (80).

8. The output transmission mechanism according to claim 7, characterized in that: A rotating shaft (1141) is provided on a side of the third reverse gear (114) facing away from the input shaft (20), the rotating shaft (1141) rotates synchronously with the third reverse gear (114), the rotating shaft (1141) passes through the housing (10), two axial load bearings (1142) are sleeved on the rotating shaft (1141), the two axial load bearings (1142) are clamped on two sides of the side wall of the housing (10), and a limiting member (1143) is provided at the end of the rotating shaft (1141) extending out of the housing (10), the limiting member (1143) forces the axial load bearing (1142) to press against the housing (10).

9. The output transmission mechanism according to claim 1, characterized in that: The first output shaft (30) is arranged concentrically with the input shaft (20), and the end of the input shaft (20) facing the first output shaft (30) is rotatably connected to the first output shaft (30) via a bearing.

10. A stepper motor assembly, characterized in that: include: a stepper motor (140); and According to the output transmission mechanism according to any one of claims 1 to 9, the stepper motor (140) is detachably connected to the housing (10), and the output shaft of the stepper motor (140) drives the input shaft (20) to rotate.

Images