Double-belt transmission structure and curtain machine

Abstract

The present invention discloses a dual-belt transmission structure, comprising a transmission shaft, which is driven to rotate by a first driver; a first transmission wheel, which is provided with a first mounting hole for slidingly sleeved with the transmission shaft; a second transmission wheel, which is provided with a second mounting hole for slidingly sleeved with the transmission shaft; a control mechanism, comprising a second driver, a toggle member driven to rotate by the second driver, and a moving block, the toggle member radially extending a toggle end, the moving block and the transmission shaft forming a connection structure that is relatively fixed in the axial direction and can rotate relatively in the circumferential direction; a toggle hole is recessed on the side surface of the moving block, and the toggle end is inserted in the toggle hole; the toggle end drives the moving block to move in the axial direction, so that the transmission shaft is only inserted in the first mounting hole or is inserted in the first mounting hole and the second mounting hole at the same time; a self-locking component, comprising an insert block and a first elastic member for driving the insert block to be inserted in the second mounting hole.

Description

Technical Field

[0001] The present invention relates to the technical field of curtain machines, and in particular to a double-belt transmission structure and a curtain machine. Background Art

[0002] With the development of technology, curtain machines that can electrically control curtains have emerged; these include curtain machines for controlling vertical curtains. Existing vertical curtain machines generally connect the vertical curtain to a pulley, and then slidably set a plurality of pulleys on a curtain track, and drive the pulleys to move by belts; in addition, a dimming shaft is used to pass through a plurality of pulleys, and the vertical curtain is driven to flip by rotating the dimming shaft; wherein, the belt and the dimming shaft each require a motor drive, and the dimming shaft is a rigid structure, so that the curtain machine cannot be a curved track type.

[0003] In the publication numbers CN112554765A and CN215634784U, a structure using a double belt drive is disclosed, wherein the first belt completes the vertical curtain flapping action, and the second belt completes the vertical curtain opening and closing action; the first belt is driven by the first transmission wheel, and the second belt is driven by the second transmission wheel, and the transmission shaft is controlled by an electromagnet to move, so that the transmission shaft only drives the first transmission wheel to rotate, or drives the first transmission wheel and the second transmission wheel to rotate at the same time. However, there are some disadvantages in the method of using an electromagnet to control the movement of the transmission shaft, such as: 1. The internal structure of the electromagnet to control the movement of the transmission shaft is complex, which is not convenient for production, and may cause the transmission box of the curtain machine to be larger; 2. The movement distance of the transmission shaft controlled by the electromagnet is difficult to grasp, and multiple debugging is required for accurate positioning, which is not convenient for production and has a high failure rate. Summary of the invention

[0004] In view of this, the present invention proposes a double-belt transmission structure and a curtain machine, which can solve one of the above problems to at least a certain extent.

[0005] The technical solution of one aspect of the present invention is achieved as follows:

[0006] A double-belt transmission structure, comprising:

[0007] A transmission shaft, the transmission shaft being driven to rotate by a first driver;

[0008] A first transmission wheel, wherein a first mounting hole for slidingly sleeved with the transmission shaft is provided at the axis center of the first transmission wheel, and the first mounting hole forms a circumferential transmission connection with the transmission shaft;

[0009] A second transmission wheel, wherein a second mounting hole for slidingly sleeved with the transmission shaft is provided at the axis center of the second transmission wheel, and the second mounting hole forms a circumferential transmission connection with the transmission shaft;

[0010] A control mechanism, the control mechanism comprising a second driver, a toggle member driven to rotate by the second driver, and a moving block, the toggle member extending a toggle end in the radial direction, the moving block and the transmission shaft forming a connection structure that is relatively fixed in the axial direction and relatively rotatable in the circumferential direction; a toggle hole is recessed on the side of the moving block, the toggle end is inserted into the toggle hole; the toggle end drives the moving block to move in the axial direction, thereby driving the transmission shaft to move in the axial direction, so that the transmission shaft is only inserted in the first mounting hole or is inserted in the first mounting hole and the second mounting hole at the same time;

[0011] The self-locking component comprises an insert block and a first elastic member for driving the insert block to be inserted into the second mounting hole; when the transmission shaft is separated from the second mounting hole, the insert block is inserted into the second mounting hole.

[0012] As a further optional solution of the dual-belt transmission structure, it further comprises a housing, in which a sliding channel is formed for the moving block to move axially; the moving block and the sliding channel remain relatively fixed in the circumferential direction.

[0013] As a further optional scheme for the dual-belt transmission structure, a limiting hole is provided in the shell, and the plug block can be slidably disposed in the limiting hole, and the plug block and the limiting hole are relatively fixed in the circumferential direction; when the plug block is inserted into the second mounting hole, at least a portion of the plug hole is still located in the limiting hole.

[0014] As a further optional solution for the dual-belt transmission structure, the first elastic member is a spring, the first elastic member is located in the limiting hole, and one end of the first elastic member abuts against the bottom of the limiting hole, and the other end abuts against the insert block.

[0015] As a further optional scheme for the dual-belt transmission structure, the movable block is provided with a first through hole arranged axially, and the first through hole is connected to the dial hole; a connecting column is coaxially arranged at one end of the transmission shaft, and the connecting column can be slidably sleeved in the first through hole, and the end of the connecting column passes through the first through hole to connect with a limiting block, and the width of the limiting block is greater than the first through hole; a second elastic member is provided between the transmission shaft and the movable block to drive the two to keep away from each other; the elastic force applied by the second elastic member to the transmission shaft is greater than the elastic force applied by the first elastic member to the plug block.

[0016] As a further optional solution of the dual-belt transmission structure, the second elastic member is a spring sleeved on the connecting column.

[0017] As a further optional solution of the dual-belt transmission structure, the connecting column has an external thread, the transmission shaft is provided with a connecting hole, and the connecting column and the connecting hole are threadedly connected.

[0018] As a further optional scheme for the dual-belt transmission structure, the movable block is provided with a second through-hole arranged along the axial direction, and the second through-hole is connected to the toggle hole; the first through-hole and the second through-hole are respectively located on the two sides corresponding to the toggle hole; the width of the limit block is smaller than the second through-hole; a screwing structure is provided on the end face of the limit block; and an avoidance structure is formed on the toggle end of the toggle member, so that an obstacle-free installation path is formed between the first through-hole and the second through-hole.

[0019] As a further optional scheme for the dual-belt transmission structure, the first transmission wheel and the second transmission wheel are rotatably arranged in the housing through bearings, and the positions of the first transmission wheel and the second transmission wheel in the housing are fixed; the first driver is connected to a driving gear, a driven gear is slidably sleeved on the transmission shaft, and the transmission shaft and the driven gear form a circumferential transmission structure; the driving gear is meshed with the driven gear; the driven gear is rotatably arranged in the housing through bearings, and the position of the driven gear in the housing is fixed.

[0020] The beneficial effects of the dual-belt transmission structure are as follows: the control mechanism drives the toggle member to rotate through the second driver, and according to the rotation of the toggle member in different directions, the toggle end of the toggle member pushes the upper wall or the lower wall in the toggle hole of the moving block, so that the moving block moves axially; the moving block drives the transmission shaft to move; wherein the size and rotation angle of the toggle end can accurately calculate the upward and downward distances of the toggle end, which is convenient for grasping the axial movement distance of the moving block, thereby facilitating the precise movement of the transmission shaft, and the structure is simple and convenient for production.

[0021] The technical solution of another aspect of the present invention is achieved as follows:

[0022] A curtain machine comprises any one of the above-mentioned double-belt transmission structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a structural schematic diagram of a double-belt transmission structure of the present invention;

[0025] Figure 2 It is a cross-sectional schematic diagram of a double-belt transmission structure of the present invention;

[0026] Figure 3 is a schematic diagram of the connection structure between the control mechanism and the first transmission wheel and the second transmission wheel;

[0027] Figure 4 A cross-sectional view of the connection structure between the control mechanism and the first transmission wheel and the second transmission wheel;

[0028] Figure 5 is a schematic diagram of the connection structure between the control mechanism and the transmission shaft;

[0029] Figure 6 for Figure 1 A is an enlarged view of the middle image.

[0030] In the figure: 100, first synchronous belt; 200, second synchronous belt;

[0031] 1. First driver; 11. Driving gear; 12. Driven gear; 2. Transmission shaft; 21. Connecting column; 22. Limiting block; 23. Second elastic member; 24. Connecting hole; 3. First transmission wheel; 31. First mounting hole; 4. Second transmission wheel; 41. Second mounting hole; 5. Control mechanism; 51. Second driver; 52. Toggle member; 521. Toggle end; 522. Avoidance structure; 53. Moving block; 531. Toggle hole; 532. First through hole; 533. Second through hole; 6. Self-locking member; 61. Insert block; 62. First elastic member; 7. Shell; 71. Sliding channel; 72. Limiting hole. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0034] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] refer to Figure 1-6 , shows a dual-belt transmission structure, including a transmission shaft 2, a first transmission wheel 3, a second transmission wheel 4, a control mechanism 5 and a self-locking member 6, wherein the first transmission wheel 3 is connected to a first synchronous belt 100, and the second transmission wheel 4 is connected to a second synchronous belt 200;

[0036] refer to Figure 2 and Figure 4 The transmission shaft 2 is driven to rotate by the first driver 1, and the first transmission wheel 3 is provided with a first mounting hole 31 for slidingly engaging with the transmission shaft 2 at the axial center position, and the first mounting hole 31 forms a circumferential transmission connection with the transmission shaft 2; the second transmission wheel 4 is provided with a second mounting hole 41 for slidingly engaging with the transmission shaft 2 at the axial center position, and the second mounting hole 41 forms a circumferential transmission connection with the transmission shaft 2; wherein, the first mounting hole 31 and the second mounting hole 41 can be holes with regular polygonal cross-sections, such as more conventional quadrilateral holes, hexagonal holes, etc., or more special holes with internal teeth; the transmission shaft 2 corresponds to the structure of the first mounting hole 31 and the second mounting hole 41, so that when the transmission shaft 2 rotates, it can drive the first transmission wheel 3 and the second transmission wheel 4 to rotate.

[0037] refer to Figure 3 , Figure 4 and Figure 5The control mechanism 5 includes a second driver 51, a toggle member 52 driven to rotate by the second driver 51, and a moving block 53. The toggle member 52 extends a toggle end 521 in the radial direction, and the moving block 53 forms a connection structure with the transmission shaft 2 that is relatively fixed in the axial direction and relatively rotatable in the circumferential direction; a toggle hole 531 is recessed on the side of the moving block 53, and the toggle end 521 is inserted in the toggle hole 531; the toggle end 521 drives the moving block 53 to move in the axial direction, thereby driving the transmission shaft 2 to move in the axial direction, so that the transmission shaft 2 is only inserted in the first mounting hole 31 or is inserted in the first mounting hole 31 and the second mounting hole 41 at the same time; wherein, when the transmission When the driving shaft 2 is only inserted into the first mounting hole 31, the driving shaft 2 only drives the first driving wheel 3 to rotate, so that the first synchronous belt 100 performs the flapping action of the vertical curtain; when the driving shaft 2 is simultaneously inserted into the first mounting hole 31 and the second mounting hole 41, the driving shaft 2 simultaneously drives the first driving wheel 3 and the second driving wheel 4 to rotate, so that the first synchronous belt 100 and the second synchronous belt 200 simultaneously perform the flapping action and the opening and closing action of the vertical curtain; wherein, the working principle of the first synchronous belt 100 to realize the flapping action and the second synchronous belt 200 to realize the opening and closing action can refer to the prior art with the publication number CN112554765A or CN215634784U. Both the first driver 1 and the second driver 51 can be motors. In addition, the dual-belt transmission structure of this embodiment cooperates with the differential transmission structure in the patent number CN216060124U to realize the flapping action of the vertical curtain alone, or the opening and closing action of the vertical curtain alone.

[0038] refer to Figure 2 and Figure 4 The self-locking member 6 includes an insert block 61 and a first elastic member 62 for driving the insert block 61 to be inserted into the second mounting hole 41; when the transmission shaft 2 is separated from the second mounting hole 41, the insert block 61 is inserted into the second mounting hole 41. In this way, the second transmission wheel 4 can be prevented from rotating, ensuring that the vertical curtain can independently realize the flapping action.

[0039] For details of the above scheme, please refer to Figure 2 and Figure 6 The dual-belt transmission structure further includes a housing 7, in which a sliding channel 71 is formed for the moving block 53 to move in the axial direction; the moving block 53 and the sliding channel 71 are relatively fixed in the circumferential direction. In this way, the sliding channel 71 is used to limit the moving block 53, ensuring that when the moving block 53 is moved by the toggle member 52, it can only move in the axial direction and not rotate in the circumferential direction; it can prevent the moving block 53 from rotating when the transmission shaft 2 rotates, thereby preventing the moving block 53 from interfering with the toggle member 52.

[0040] Specifically, in order to facilitate the circumferential fixation of the second transmission wheel 4, refer to Figure 2 , a limiting hole 72 is provided in the shell 7, the insert block 61 is slidably provided in the limiting hole 72, and the insert block 61 and the limiting hole 72 are relatively fixed in the circumferential direction; when the insert block 61 is inserted into the second mounting hole 41, at least a part of the insert hole is still located in the limiting hole 72. Specifically, the first elastic member 62 is a spring, the first elastic member 62 is located in the limiting hole 72, and one end of the first elastic member 62 abuts against the bottom of the limiting hole 72, and the other end abuts against the insert block 61. When the transmission shaft 2 moves axially and disengages from the second mounting hole 41, the first elastic member 62 drives the insert block 61 to be inserted into the second mounting hole 41; when the transmission shaft 2 moves axially and is inserted into the second mounting hole 41, the transmission shaft 2 pushes the insert block 61 out of the second mounting hole 41.

[0041] In some specific embodiments, in order to facilitate the realization of a connection structure in which the moving block 53 and the transmission shaft 2 are relatively fixed in the axial direction and relatively rotatable in the circumferential direction, reference Figure 5 , the moving block 53 is provided with a first through hole 532 arranged along the axial direction, and the first through hole 532 is connected to the toggle hole 531; a connecting column 21 is coaxially provided at one end of the transmission shaft 2, and the connecting column 21 can be slidably sleeved in the first through hole 532, and the end of the connecting column 21 passes through the first through hole 532 to connect to the limiting block 22, and the width of the limiting block 22 is larger than the first through hole 532; a second elastic member 23 is provided between the transmission shaft 2 and the moving block 53 to drive the two to keep away from each other. In this embodiment, the transmission shaft 2 and the connecting column 21 can be an integrally formed structure or a detachable assembly structure, and the second elastic member 23 can keep the transmission shaft 2 away from the moving block 53, that is, the limiting block 22 is tightly attached to the inner bottom wall of the toggle hole 531; when the transmission shaft 2 is inserted into the second mounting hole 41, Figure 4 or Figure 5From the perspective of the present invention, the toggle member 52 is toggled downward, and the toggle end 521 pushes the inner bottom wall of the toggle hole 531, so that the moving block 53 descends, and the transmission shaft 2 descends accordingly. If the transmission shaft 2 and the second mounting hole 41 are not aligned at this time, the end of the transmission shaft 2 will abut against the end surface of the second transmission wheel 4, and the second elastic member 23 keeps the transmission shaft 2 moving downward. When the first driver 1 drives the transmission shaft 2 to rotate, the transmission shaft 2 is aligned with the second mounting hole 41 during the rotation process, so that the transmission shaft 2 is inserted into the second mounting hole 41. In the above process, in order to enable the second elastic member 23 to drive the transmission shaft 2 to push the plug 61 out of the second mounting hole 41, of course, the elastic force applied by the second elastic member 23 to the transmission shaft 2 is greater than the elastic force applied by the first elastic member 62 to the plug 61; wherein, the second elastic member 23 is a spring sleeved on the connecting column 21.

[0042] The above scheme is specific, in order to facilitate the assembly of the structure, refer to Figure 5 The transmission shaft 2 and the connecting column 21 are a detachable assembly structure, the connecting column 21 has an external thread, the transmission shaft 2 is provided with a connecting hole 24, and the connecting column 21 and the connecting hole 24 are threadedly connected. In this way, the depth of the connecting column 21 entering the connecting hole 24 can be adjusted by rotating the connecting column 21, thereby adjusting the overall length of the transmission shaft 2 and the connecting column 21 after being combined; when there is an error in the size of the produced parts, the overall length of the transmission shaft 2 and the connecting column 21 after being combined can be adjusted to ensure that the toggle member 52 can completely move the transmission shaft 2 out of the second mounting hole 41; this structure has strong adaptability, can reduce the requirements for the accuracy of the part size, and is easy to produce.

[0043] Specifically, in order to facilitate the rotation of the connecting column 21, refer to Figure 5 and Figure 6The moving block 53 is provided with a second through hole 533 arranged along the axial direction, and the second through hole 533 is connected with the toggle hole 531; the first through hole 532 and the second through hole 533 are respectively located on the two sides corresponding to the toggle hole 531; the width of the limit block 22 is smaller than the second through hole 533; a screwing structure is provided on the end surface of the limit block 22; and an avoidance structure 522 is formed on the toggle end 521 of the toggle member 52, so that an unobstructed installation path is formed between the first through hole 532 and the second through hole 533. In this way, on the one hand, it is convenient to assemble the connecting column 21 and the moving block 53, and on the other hand, a tool such as a screwdriver can be directly inserted into the installation path between the first through hole 532 and the second through hole 533, and the connecting column 21 can be directly rotated through the screwing structure on the limit block 22, so that the overall length of the transmission shaft 2 and the connecting column 21 after combination is more convenient to adjust. It should be noted that the first through hole 532 and the second through hole 533 may be directly formed on the moving block 53 , or may be indirectly formed on the moving block 53 through other components.

[0044] Specifically, in order to facilitate the smooth rotation of the first transmission wheel 3 and the second transmission wheel 4, refer to Figure 2 The first transmission wheel 3 and the second transmission wheel 4 are rotatably arranged in the housing 7 through bearings, and the positions of the first transmission wheel 3 and the second transmission wheel 4 in the housing 7 are fixed; in addition, in order to facilitate the first driver 1 to drive the transmission shaft 2 to rotate, refer to Figure 1 , Figure 2 and Figure 3 The first driver 1 is connected with a driving gear 11, and a driven gear 12 is slidably sleeved on the transmission shaft 2, and the transmission shaft 2 and the driven gear 12 form a circumferential transmission structure; the driving gear 11 is meshed with the driven gear 12; the driven gear 12 is rotatably arranged in the housing 7 through a bearing, and the position of the driven gear 12 in the housing 7 is fixed. Among them, the driven gear 12 and the first transmission wheel 3 can be an integrally formed structure.

[0045] In addition, refer to Figure 1 , shows a curtain machine, including any one of the above-mentioned double-belt transmission structures.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A double-belt transmission structure, characterized in that: include: A transmission shaft, the transmission shaft being driven to rotate by a first driver; A first transmission wheel, wherein a first mounting hole for slidingly sleeved with the transmission shaft is provided at the axis center of the first transmission wheel, and the first mounting hole forms a circumferential transmission connection with the transmission shaft; A second transmission wheel, wherein a second mounting hole for slidingly sleeved with the transmission shaft is provided at the axis center of the second transmission wheel, and the second mounting hole forms a circumferential transmission connection with the transmission shaft; A control mechanism, the control mechanism comprising a second driver, a toggle member driven to rotate by the second driver, and a moving block, the toggle member extending a toggle end in the radial direction, the moving block and the transmission shaft forming a connection structure that is relatively fixed in the axial direction and relatively rotatable in the circumferential direction; a toggle hole is recessed on the side of the moving block, the toggle end is inserted into the toggle hole; the toggle end drives the moving block to move in the axial direction, thereby driving the transmission shaft to move in the axial direction, so that the transmission shaft is only inserted in the first mounting hole or is inserted in the first mounting hole and the second mounting hole at the same time; The self-locking member comprises an insert block and a first elastic member for driving the insert block to be inserted into the second mounting hole; when the transmission shaft is separated from the second mounting hole, the insert block is inserted into the second mounting hole; It also includes a shell, in which a sliding channel is formed for the moving block to move axially; the moving block and the sliding channel are relatively fixed in the circumferential direction.

2. A double-belt transmission structure according to claim 1, characterized in that: A limiting hole is provided in the shell, and the insert block can be slidably disposed in the limiting hole, and the insert block and the limiting hole are relatively fixed in the circumferential direction; when the insert block is inserted into the second mounting hole, at least a part of the insert block is still located in the limiting hole.

3. A double-belt transmission structure according to claim 2, characterized in that: The first elastic member is a spring, and the first elastic member is located in the limiting hole, and one end of the first elastic member abuts against the bottom of the limiting hole, and the other end abuts against the inserting block.

4. A double-belt transmission structure according to claim 1, characterized in that: The moving block is provided with a first through hole arranged axially, and the first through hole is connected to the dial hole; a connecting column is coaxially arranged at one end of the transmission shaft, and the connecting column can be slidably sleeved in the first through hole, and the end of the connecting column passes through the first through hole to connect to a limiting block, and the width of the limiting block is greater than the first through hole; a second elastic member is provided between the transmission shaft and the moving block to drive the two to keep away from each other; the elastic force applied by the second elastic member to the transmission shaft is greater than the elastic force applied by the first elastic member to the plug block.

5. A double-belt transmission structure according to claim 4, characterized in that: The second elastic member is a spring sleeved on the connecting column.

6. A double-belt transmission structure according to claim 4, characterized in that: The connecting column has an external thread, the transmission shaft is provided with a connecting hole, and the connecting column and the connecting hole are threadedly connected.

7. A double-belt transmission structure according to claim 6, characterized in that: The movable block is provided with a second through hole arranged along the axial direction, and the second through hole is connected to the toggle hole; the first through hole and the second through hole are respectively located on the two sides corresponding to the toggle hole; the width of the limit block is smaller than the second through hole; a screwing structure is provided on the end face of the limit block; an avoidance structure is formed on the toggle end of the toggle member, so that an obstacle-free installation path is formed between the first through hole and the second through hole.

8. A double-belt transmission structure according to claim 1, characterized in that: The first transmission wheel and the second transmission wheel are rotatably arranged in the housing through bearings, and the positions of the first transmission wheel and the second transmission wheel in the housing are fixed; the first driver is connected to a driving gear, a driven gear is slidably sleeved on the transmission shaft, and the transmission shaft and the driven gear form a circumferential transmission structure; the driving gear is meshed with the driven gear; The driven gear is rotatably disposed in the housing via a bearing, and the position of the driven gear in the housing is fixed.

9. A curtain machine, characterized in that: A double-belt transmission structure comprising any one of claims 1-8.

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