Transmission case and electric curtain

Abstract

The utility model relates to a transmission case and an electric curtain. The transmission case comprises a transmission case body and at least one group of transmission components arranged in the transmission case body. The transmission assembly comprises an input rotating part used for being connected with a driving source and a transmission wheel used for being connected with an output belt, the central axis of the input rotating part coincides with the central axis of the transmission wheel, the input rotating part is in transmission connection with the transmission wheel, and the input rotating part slides in the axial direction relative to the transmission wheel. An elastic piece is arranged between the input rotating piece and the transmission wheel, and the input rotating piece is subjected to the elastic force of the elastic piece extending out of the transmission box body. The output rotating piece can movably stretch out and draw back and can move in the axial direction to the abutting position in the driving source abutting process, the automatic abutting effect is achieved, and the installation convenience and transmission reliability of the transmission box are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of light shielding, in particular to an electric curtain, and more particularly to a transmission box and an electric curtain. Background Art

[0002] As an important part of the smart home system, the design and function of electric curtains are constantly evolving to meet the convenience and intelligent needs of modern life. Among them, the motor is the power source, and the performance of the motor directly affects the operation effect and service life of the curtain. The design of the guide rail needs to consider load-bearing, stability, and installation convenience. The cooperation of the belt and the pulley ensures the smooth opening and closing of the curtain.

[0003] In the electric curtain system, the detachable connection design of the motor box and the transmission box is for easy maintenance and upgrade. However, when the motor shaft and the transmission box are docked and matched, the insertion part of the shaft and the groove needs to be accurately matched and the angle needs to be adjusted consistently, resulting in great assembly difficulty. When a floating docking mechanism is set on the motor shaft, it is easy to cause the problem that the overall structure of the motor box is huge, affecting the installation space and aesthetics, so improvement is needed. Summary of the Utility Model

[0004] To overcome the problems existing in the related art, an embodiment of the utility model provides a transmission box and an electric curtain to solve the technical problems of great docking difficulty and huge structure of the motor box.

[0005] According to the first aspect of the embodiment of the utility model, a transmission box is provided. The transmission box includes a transmission box body and at least one set of transmission components installed in the transmission box body;

[0006] The transmission component includes an input rotating part for connecting a driving source and a transmission wheel for connecting an output belt. The central axis of the input rotating part coincides with the central axis of the transmission wheel. The input rotating part and the transmission wheel are in transmission connection. The input rotating part axially slides relative to the transmission wheel. An elastic member is arranged between the input rotating part and the transmission wheel, and the input rotating part receives an elastic force protruding towards the outside of the transmission box body from the elastic member.

[0007] In one embodiment, the transmission wheel is provided with a transmission cavity, at least a part of the input rotating part is slidably inserted into the transmission cavity, and the elastic member is located in the transmission cavity and elastically pushes the input rotating part.

[0008] In one embodiment, a spline groove is arranged on the wall surface of the transmission cavity, and the input rotating part is provided with a spline shaft matched with the transmission cavity.

[0009] In one embodiment, it further includes a guiding column, one end of the guiding column is fixedly connected to the input rotating part, the other end is slidably connected to the transmission wheel, and the elastic part is sleeved on the guiding column.

[0010] In one embodiment, a stop retaining ring is arranged at the end of the guiding column.

[0011] In one embodiment, the transmission box is provided with a mounting shaft, and the transmission wheel is rotatably connected to the mounting shaft.

[0012] In one embodiment, the transmission wheel includes a pulley part and a transmission part protruding from the pulley part. The pulley part is connected to the mounting shaft through a transmission bearing, and the transmission part is in transmission connection with the input rotating part.

[0013] In one embodiment, it further includes a locking part installed on the transmission box body. The locking part is provided with a guiding cavity, and the input rotating part is slidably defined in the guiding cavity.

[0014] In one embodiment, two sets of transmission components are arranged in parallel in the transmission box body, and there is a height difference between the transmission wheels of the two sets of transmission components.

[0015] According to the second aspect of the embodiments of the present invention, there is provided an electric curtain, including a motor assembly, a track device and the transmission box as described above. The motor assembly is provided with a power output shaft corresponding to the transmission component, and the power output shaft is in plug-in fit with the input rotating part.

[0016] The technical solutions provided by the embodiments of the present invention may include the following beneficial effects: The elastic part is elastically compressed between the input rotating part and the transmission wheel, so that the output rotating part can slide axially relative to each other telescopically, so as to keep the transmission box in close fit when docking with the driving source. And, the output rotating part can move telescopically, and can move axially until the docking position is completed during the docking process of the driving source, realizing the effect of automatic docking, improving the installation convenience of the transmission box and the reliability of transmission.

[0017] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings herein are incorporated into the specification and constitute a part of this specification, showing embodiments consistent with the present invention and used together with the specification to explain the principles of the present invention.

[0019] Figure 1 It is a schematic structural diagram of an electric curtain shown according to an embodiment.

[0020] Figure 2It shows a schematic assembly diagram of a motor assembly and a transmission case according to an embodiment.

[0021] Figure 3 It shows a partial sectional schematic diagram of the assembly of a motor assembly and a transmission case according to an embodiment.

[0022] Figure 4 It is Figure 3 an enlarged schematic diagram at position A in

[0023] Figure 5 It shows an exploded schematic diagram of a transmission case according to an embodiment.

[0024] Figure 6 It shows an exploded schematic diagram of a transmission component according to an embodiment.

[0025] In the figure, there is a transmission case 10; a transmission case body 11; a lower case body 111; an upper case body 112; a mounting shaft 1121; a cover plate 113; an upper transmission cavity 114; a lower transmission cavity 115; a transmission component 12; an input rotating part 121; a transmission wheel 122; a belt wheel part 1221; a transmission part 1222; a transmission cavity 1223; an elastic part 123; a locking part 124; a guiding cavity 1241; a second transmission group 125; a first transmission group 126; a guiding column 127; a stop retaining ring 1271; a transmission bearing 128; a motor assembly 20; a track device 30. Detailed implementation manners

[0026] Among them, the accompanying drawings are only for illustrative purposes, showing only schematic diagrams rather than actual diagrams, and should not be construed as a limitation to the present utility model; for better illustrating the embodiments of the present utility model, some components in the accompanying drawings will be omitted, enlarged or reduced, which do not represent the dimensions of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the accompanying drawings may be omitted.

[0027] In the accompanying drawings of the embodiments of the present utility model, the same or similar reference numerals correspond to the same or similar components; in the description of the present utility model, it should be understood that if terms such as "upper", "lower", "left", "right", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model 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. Therefore, the terms describing the positional relationship in the accompanying drawings are only for illustrative purposes and should not be construed as a limitation to the present utility model. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0028] In the description of the present utility model, unless otherwise clearly specified and defined, if terms such as "connection" are used to indicate the connection relationship between components, such terms shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0029] As Figures 1 to 6 shown, the present utility model provides a transmission box 10, and the transmission box 10 is used to connect to the drive source of the electric curtain, and the drive source can be set as a power mechanism with single-axis output or a power mechanism with double-axis output.

[0030] The transmission box 10 includes a transmission box body 11 and at least one set of transmission components 12 installed in the transmission box body 11. The transmission box body 11 is used to connect to the track device 30 and limit the transmission belt. Among them, the transmission component 12 is rotatably installed in the transmission box body 11 and connected to the transmission belt, so that the power output by the drive source is transmitted to the transmission belt through the transmission component 12, and the transmission belt can drive the curtain cloth to open and close.

[0031] Optionally, one set of transmission components 12 is arranged in the transmission box body 11, and the transmission component 12 can drive one or two transmission belts to open and close. Optionally, two sets of transmission components 12 are arranged in the transmission box body 11, and each set of transmission components 12 can drive the transmission belt to move. Further preferably, the two sets of transmission components 12 are arranged in parallel at intervals, and the transmission belts connected thereto have a height difference, so as to realize staggered transmission. Among them, two sets of transmission components 12 arranged in parallel are arranged in the transmission box body 11, and the transmission wheels 122 of the two sets of transmission components 12 have a height difference.

[0032] The transmission component 12 includes an input rotating part 121 for connecting to the drive source and a transmission wheel 122 for connecting to the output belt. The central axis of the input rotating part 121 coincides with the central axis of the transmission wheel 122. The input rotating part 121 and the transmission wheel 122 are coaxially arranged, the input rotating part 121 and the transmission wheel 122 are in transmission connection, and the input rotating part 121 axially slides relative to the transmission wheel 122.

[0033] The input rotating part 121 and the transmission wheel 122 are in transmission cooperation, and can adopt direct cooperation or indirect cooperation. Among them, in the direct transmission cooperation mode, the input rotating part 121 and the transmission wheel 122 are directly connected. For example, the input rotating part 121 and the transmission wheel 122 adopt a complementary tooth shape structure for transmission cooperation, that is, a plurality of tooth-shaped grooves are provided at the end of the input rotating part 121, and a plurality of matching tooth-shaped bosses are provided axially on the transmission wheel 122, so that the tooth-shaped bosses are inserted into the corresponding tooth-shaped grooves to achieve gear insertion cooperation and axial sliding. In another alternative embodiment, the input rotating part 121 and the transmission wheel 122 are in plug-in cooperation, and a transmission surface is provided at the plug-in part of the two. That is, the input rotating part 121 is inserted into the transmission wheel 122; or, the transmission wheel 122 is inserted into the input rotating part 121. Preferably, the input rotating part 121 and the transmission wheel 122 adopt a connection method of shaft and hole, and the hole can be a polygonal hole or a spline hole. The polygonal hole is provided on the transmission wheel 122, and the cross-section of the shaft is also polygonal or a spline shaft.

[0034] An elastic member 123 is provided between the input rotating part 121 and the transmission wheel 122, and the input rotating part 121 is subjected to an elastic force that the elastic member 123 extends outward toward the transmission housing 11. The elastic member 123 is pre-pressed by the input rotating part 121 and the transmission wheel 122, so as to form an elastic pre-tightening force between the input rotating part 121 and the transmission wheel 122. The elastic pre-tightening force can eliminate the axial transmission between the input rotating part 121 and the transmission wheel 122. Preferably, the elastic member 123 is set as a compression spring.

[0035] In addition, when the drive source is connected to the input rotating part 121, due to the input rotating part 121 under the conditions of elastic pre-tightening force and axial sliding fit, the power output shaft of the drive source can be randomly inserted and rotated to adjust to the transmission cooperation position without manual alignment and insertion, improving the convenience of assembly and the effectiveness of transmission. The output rotating part can slide axially relative to each other, so as to keep the transmission case 10 in close contact when docking with the drive source.

[0036] As Figures 3 to 6 shown, the input rotating part 121 and the transmission wheel 122 are in plug-in and sliding cooperation, and there is a circumferential limit connection between the two. In one embodiment, the transmission wheel 122 is provided with a transmission cavity 1223, at least a part of the input rotating part 121 is slidably inserted into the transmission cavity 1223, and the elastic member 123 is located in the transmission cavity 1223 and elastically pushes the input rotating part 121. The inner wall of the transmission cavity 1223 is provided with a transmission part 1222, and the transmission part 1222 is set as at least one transmission surface or one or more tooth-shaped grooves. The part of the input rotating part 121 inserted into the transmission cavity 1223 is provided with a matching part for the transmission part 1222 to achieve plug-in cooperation and axial sliding.

[0037] In a preferred embodiment, the wall surface of the transmission cavity 1223 is provided with a spline groove, and the input rotating member 121 is arranged on a spline shaft that mates with the transmission surface. The input rotating member 121 and the transmission cavity 1223 are fitted with a spline structure, which not only ensures smooth transmission but also good smoothness of axial sliding. Preferably, one end of the elastic member 123 abuts against the bottom surface of the transmission cavity 1223, and the other end abuts against the end surface of the input rotating member 121, thereby achieving elastic abutment.

[0038] In one embodiment, the transmission box 10 further includes a guide post 127. One end of the guide post 127 is fixedly connected to the input rotating member 121, and the other end is slidably connected to the transmission wheel 122. The elastic member 123 is sleeved on the guide post 127. The guide post 127 and the input rotating member 121 are fixedly connected, and the two form a coaxial structure. The elastic member 123 is located between the guide post 127 and the transmission cavity 1223 to control the movement range of the elastic member 123.

[0039] The guide post 127 passes through the transmission wheel 122 and is slidably connected to the transmission wheel 122. Further, a stop retaining ring 1271 is provided at the end of the guide post 127. A sliding hole is provided in the part of the sliding wheel that connects to the guide post 127. The outer contour dimension of the stop retaining ring 1271 is larger than the dimension of the sliding hole, so that the distance of the input rotating member 121 from the transmission wheel 122 is limited by the position and dimension of the stop retaining ring 1271, thereby facilitating the adjustment of the interval distance between the transmission wheel 122 and the input rotating member 121 and the pre-compression of the elastic member 123.

[0040] The transmission box 10 is provided with a thin-wall structure, which can be a multi-chamber structure composed of two or more thin-wall structural members. Different transmission components 12 can be distributed in different chambers to support and connect respectively. Optionally, the transmission box 10 is provided with a mounting shaft 1121, and the transmission wheel 122 is rotatably connected to the mounting shaft 1121. The mounting shaft 1121 protrudes in a columnar or tubular shape. The mounting shaft 1121 is inserted into the transmission wheel 122 and forms a rotatable connection. Preferably, a transmission bearing 128 is provided between the mounting shaft 1121 and the transmission wheel 122 to improve the rotational flexibility. Further, the mounting shaft 1121 is provided as a stepped shaft, and the transmission bearing 128 is mounted on the stepped shaft and the inner ring abuts against the stepped surface to achieve axial positioning.

[0041] In a specific embodiment, the driving wheel 122 includes a pulley part 1221 and a driving part 1222 protruding from the pulley part 1221. The pulley part 1221 is connected to the mounting shaft 1121 through a driving bearing 128, and the driving part 1222 is in driving connection with the input rotating part 121. The driving part 1222 and the pulley part 1221 form a stepped structure. The driving part 1222 extends towards the input rotating part 121, and the size of the pulley part 1221 is adapted to the specification of the driving belt, which is beneficial to the unified assembly of the driving belt. The lengths of the driving parts 1222 of different driving components 12 can be flexibly set according to different length specifications and can be connected to the input rotating parts 121 at the same height.

[0042] The guide post 127 defines the spacing distance between the driving wheel 122 and the input rotating part 121, so that the driving component 12 forms an integral pre-installation structure.

[0043] In an embodiment, the transmission case 10 further includes a locking member 124 installed on the transmission case body 11. The locking member 124 is provided with a guide cavity 1241, and the input rotating part 121 is slidably defined in the guide cavity 1241. The locking member 124 is installed on the transmission case body 11. The opening of the guide cavity 1241 faces the input rotating part 121 side, and the input rotating part 121 is inserted into the guide cavity 1241. The guide cavity 1241 defines the circumferential movement range of the input rotating part 121. Among them, the input rotating part 121 can slide and rotate along the guide cavity 1241. Preferably, a limiting ring is formed by the radial partial protrusion of the input rotating part 121. The limiting ring and the driving part 1222 of the input rotating part 121 form a stepped structure. The limiting ring is in sliding fit with the cavity wall of the guide cavity 1241, and the sliding fit area can be reduced to improve the sliding flexibility.

[0044] Further, at least one locking convex plate protruding radially is provided on the part of the locking member 124 exceeding the transmission case body 11. The input rotating part 121 is movably installed on the locking member 124. The locking convex plate has a non-circular convex plate structure. After the locking member 124 and the locking convex plate are inserted into the motor assembly 20 and rotated, the transmission case 10 and the motor assembly 20 are locked and connected.

[0045] In one embodiment, the transmission case 10 includes a lower case body 111, an upper case body 112 and a cover plate 113. The partition is detachably connected to the upper case body 112. There are two sets of transmission components 12, and the two sets of transmission components 12 are arranged at intervals in parallel, namely a first transmission group 126 and a second transmission group 125. The upper case body 112 includes an upper transmission cavity 114 and a lower transmission cavity 115, and a partition is arranged between the upper transmission cavity 114 and the lower transmission cavity 115. An installation shaft 1121 protrudes from the partition. The first transmission group 126 is installed on the upper case body 112, and the pulley part 1221 of the first transmission group 126 is located in the lower transmission cavity 115. Another installation shaft 1121 protrudes from the cover plate 113. The second transmission group 125 is installed on the installation shaft 1121 on the cover plate 113, so that the pulley part 1221 of the second transmission group 125 is located in the upper transmission cavity 114. The partition is provided with a clearance hole at a position corresponding to the second transmission group 125, and the second transmission group 125 penetrates into the upper case body 112 along the clearance hole.

[0046] Two locking members 124 are installed on the lower case body 111 at intervals. The lower case body 111 is buckled on the outside of the upper case body 112, so that the input rotating parts 121 of the two sets of transmission components 12 are inserted into the corresponding locking members 124, thereby realizing the lower sliding limit and facilitating the assembly.

[0047] As Figures 1 to 2 shown, the transmission case 10 disclosed in the above embodiment is applied to an electric curtain. Among them, the electric curtain includes a motor assembly 20, a track device 30 and a transmission case 10. The motor assembly 20 is provided with a power output shaft corresponding to the transmission component 12, and the power output shaft is inserted and matched with the input rotating part 121. The power output shaft is inserted and matched with the input rotating part 121 and transmits torque force to realize power transmission. Preferably, two sets of power output shafts are provided, and the two sets of power output shafts are independently controlled. The transmission case 10 is provided with two sets of corresponding transmission components 12, and the floating butt joint of the input rotating part 121 is realized through the elastic member 123, so as to improve the convenience of connection.

[0048] Those skilled in the art will readily conceive of other embodiments of the present invention after considering the specification and practicing the disclosure herein. This application is intended to cover any variations, uses, or adaptations of the present invention, which follow the general principles of the present invention and include known common knowledge or conventional technical means in the technical field not disclosed in the present invention. The specification and embodiments are only regarded as exemplary, and the true scope and spirit of the present invention are pointed out by the following claims.

[0049] It should be understood that the present invention is not limited to the exact structures already described and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present invention is only limited by the appended claims.

Claims

1. A transmission box, characterized in that: The transmission box (10) comprises a transmission box body (11) and at least one set of transmission components (12) installed in the transmission box body (11); The transmission assembly (12) comprises an input rotating member (121) for connecting to a driving source and a transmission wheel (122) for connecting to an output belt, the central axis of the input rotating member (121) coincides with the central axis of the transmission wheel (122), the input rotating member (121) and the transmission wheel (122) are transmission-connected, the input rotating member (121) slides axially relative to the transmission wheel (122), an elastic member (123) is provided between the input rotating member (121) and the transmission wheel (122), and the input rotating member (121) is subjected to an elastic force of the elastic member (123) extending toward the outside of the transmission housing (11).

2. The transmission box according to claim 1, characterized in that: The transmission wheel (122) is provided with a transmission cavity (1223), at least part of the input rotating member (121) is slidably inserted in the transmission cavity (1223), and the elastic member (123) is located in the transmission cavity (1223) and elastically pushes the input rotating member (121).

3. The transmission box according to claim 2, characterized in that: A spline groove is provided on the wall surface of the transmission cavity (1223), and the input rotating component (121) is provided with a spline shaft that cooperates with the transmission cavity.

4. The transmission box according to claim 1, characterized in that: It also comprises a guide column (127), one end of the guide column (127) is fixedly connected to the input rotating member (121), and the other end is slidably connected to the transmission wheel (122), and the elastic member (123) is sleeved on the guide column (127).

5. The transmission box according to claim 4, characterized in that: A stop ring (1271) is provided at the end of the guide column (127).

6. The transmission box according to claim 1, characterized in that: The transmission box (10) is provided with a mounting shaft (1121), and the transmission wheel (122) is rotatably connected to the mounting shaft (1121).

7. The transmission box according to claim 6, characterized in that: The transmission wheel (122) comprises a pulley portion (1221) and a transmission portion (1222) protruding from the pulley portion (1221); the pulley portion (1221) is connected to the mounting shaft (1121) via a transmission bearing (128); and the transmission portion (1222) is transmission-connected to the input rotating member (121).

8. The transmission box according to claim 1, characterized in that: It also comprises a locking member (124) mounted on the transmission housing (11), wherein the locking member (124) is provided with a guide cavity (1241), and the input rotating member (121) is slidably confined in the guide cavity (1241).

9. The transmission box according to any one of claims 1 to 8, characterized in that: Two sets of transmission components (12) arranged in parallel are arranged in the transmission housing (11), and the transmission wheels (122) of the two sets of transmission components (12) have a height difference.

10. An electric curtain, characterized in that: It comprises a motor assembly (20), a track device (30) and a transmission box (10) as claimed in any one of claims 1 to 9, wherein the motor assembly (20) is provided with a power output shaft corresponding to the transmission assembly (12), and the power output shaft is plug-fitted with the input rotating member (121).

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