Crank arm transmission structure with self-adaptive adjustment function

Abstract

The utility model relates to the technical field of crank arm transmission structures, and discloses a self-adaptive adjustment crank arm transmission structure which comprises a first crank arm, a second crank arm, a central rotating shaft, a motor, an output shaft, a first transmission wheel A, a first transmission wheel B, a second transmission wheel A, a second transmission wheel B, a first transmission part and a second transmission part. By adopting the structure, when the external transmission shaft of the belt line is subjected to vertical height adjustment, the first crank arm and the second crank arm can rotate by taking the central rotating shaft as a fulcrum, and the first crank arm can rotate on the output shaft, so that the included angle between the first crank arm and the second crank arm is changed; therefore, the relative positions of the first crank arm and the second crank arm can be adjusted, and the belt line transmission shaft can move up and down within a certain range.

Description

Technical Field

[0001] The utility model relates to the technical field of flex-arm transmission structures, in particular to a flex-arm transmission structure with self-adaptive adjustment. Background Art

[0002] The crank arm transmission structure is a common mechanical transmission structure, offering advantages such as reduced floor space and stable transmission. However, most existing crank arm transmission structures are fixed in structure. Adjusting the belt line height requires replacing the crank arm transmission structure to meet the new height transmission requirements, making the overall operation more cumbersome. Utility Model Content

[0003] The utility model mainly provides an adaptively adjustable flex arm transmission structure to solve the problem that the overall structure of the flex arm transmission structure is fixed, and when the belt line is adjusted up and down in height, the flex arm transmission structure needs to be replaced to meet the new height transmission requirements, and the overall operation is relatively troublesome.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A self-adjustable flex arm transmission structure comprises a first flex arm, a second flex arm, a central rotating shaft, a motor and an output shaft; the output shaft is arranged at the output end of the motor, one end of the first flex arm is rotatably connected to the output shaft, the central rotating shaft is rotatably connected to the other end of the first flex arm, one end of the second flex arm is rotatably connected to the central rotating shaft, the other end of the second flex arm is rotatably connected to an external transmission shaft, a first transmission wheel A is fixedly connected to the output shaft, a first transmission wheel B is fixedly connected to the central rotating shaft, a second transmission wheel A is fixedly connected to the central rotating shaft, and a second transmission wheel B is fixedly connected to the external transmission shaft, a first transmission member is provided on the first transmission wheel A and the first transmission wheel B, and a second transmission member is provided on the second transmission wheel A and the second transmission wheel B. By adopting the structure of the present application, the motor can drive the output shaft to rotate, and the output shaft drives the central rotating shaft to rotate through the first transmission wheel A and the first transmission wheel B in cooperation with the first transmission member, and the central rotating shaft drives the external transmission shaft of the belt line through the second transmission wheel A and the second transmission wheel B in cooperation with the second transmission member, thereby realizing stable transmission; when the external transmission shaft of the belt line is adjusted up and down in height, the first crank arm and the second crank arm can rotate with the central rotating shaft as the fulcrum, and the first crank arm can rotate on the output shaft, so that the angle between the first crank arm and the second crank arm changes, thereby realizing the adjustment of the relative positions of the first crank arm and the second crank arm, satisfying the up and down movement of the belt line transmission shaft within a certain range.

[0006] Furthermore, the first curved arm and the second curved arm have the same structure; the first curved arm includes a fixed arm A and a fixed arm B, with a tensioning mechanism disposed between the fixed arms A and B. The tensioning mechanism can adjust the distance between the fixed arms A and B, thereby tensioning the first transmission member.

[0007] Furthermore, the first transmission member and the second transmission member are both transmission synchronous belts, which have a simple transmission structure and stable transmission.

[0008] Furthermore, the tensioning mechanism includes a lead screw whose end is rotatably connected to the inner end of the fixed arm A, and a guide rod fixedly connected to the inner end of the fixed arm A. The lead screw and the guide rod are axially parallel. The fixed arm B is provided with a threaded hole that mates with the lead screw, and the fixed arm B is provided with a guide hole that mates with the guide rod. The lead screw is threadedly connected to the threaded hole, and the guide rod is slidably connected to the guide hole. With this structure, the distance between the fixed arms A and B can be adjusted by rotating the lead screw to mate with the guide rod, resulting in a simple and practical adjustment structure.

[0009] Furthermore, the lead screw is provided with a rotating block, which can better rotate the lead screw.

[0010] Beneficial effect: With the structure of the present application, the motor can drive the output shaft to rotate, and the output shaft drives the central rotating shaft to rotate through the first transmission wheel A and the first transmission wheel B in cooperation with the first transmission member, and the central rotating shaft drives the external transmission shaft of the belt line through the second transmission wheel A and the second transmission wheel B in cooperation with the second transmission member, thereby realizing stable transmission; when the external transmission shaft of the belt line is adjusted up and down in height, the first crank arm and the second crank arm can rotate with the central rotating shaft as the fulcrum, and the first crank arm can rotate on the output shaft, so that the angle between the first crank arm and the second crank arm changes, thereby realizing the adjustment of the relative positions of the first crank arm and the second crank arm, satisfying the up and down movement of the belt line transmission shaft within a certain range. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is an oblique isometric diagram of the motor of this embodiment;

[0012] Figure 2 is a schematic oblique view of the motor of this embodiment;

[0013] Figure 3 For this embodiment Figure 2 A is an enlarged schematic diagram.

[0014] Figure numerals: central shaft 1, motor 2, first transmission wheel A3, first transmission wheel B4, second transmission wheel A5, second transmission wheel B6, first transmission member 7, second transmission member 8, fixed arm A9, fixed arm B10, guide screw 11, guide rod 12, rotating block 13. DETAILED DESCRIPTION

[0015] The following is a detailed description of the technical solution of the adaptively adjustable flex-arm transmission structure of the present invention in conjunction with the embodiments.

[0016] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0017] like Figure 1 、 Figure 2 、 Figure 3As shown, the adaptive adjustment elbow transmission structure of the embodiment comprises a first elbow, a second elbow, a center rotating shaft 1, a motor 2 and an output shaft; the output shaft is arranged on the output end of the motor 2, one end of the first elbow is rotationally connected to the output shaft, the center rotating shaft 1 is rotationally connected to the other end of the first elbow, one end of the second elbow is rotationally connected to the center rotating shaft 1, the other end of the second elbow is rotationally connected to an external transmission shaft, a first transmission wheel A 3 is fixedly connected to the output shaft, a first transmission wheel B 4 is fixedly connected to the center rotating shaft 1, a second transmission wheel A 5 is fixedly connected to the center rotating shaft 1, a second transmission wheel B 6 is fixedly connected to the external transmission shaft, first transmission members 7 are arranged on the first transmission wheel A and the first transmission wheel B 4, and second transmission members 8 are arranged on the second transmission wheel A 5 and the second transmission wheel B 6. The first elbow and the second elbow are the same in structure; the first elbow comprises a fixed arm A 9 and a fixed arm B 10, and a tensioning mechanism is arranged between the fixed arm A 9 and the fixed arm B 10. The first transmission members 7 and the second transmission members 8 are both transmission synchronous belts. The tensioning mechanism comprises a guide screw 11 rotationally connected to the inner end of the fixed arm A 9 and a guide rod 12 fixedly connected to the inner end of the fixed arm A 9, the guide screw 11 and the guide rod 12 are axially parallel, a threaded hole matched with the guide screw 11 is formed in the fixed arm B 10, a guide hole matched with the guide rod 12 is formed in the fixed arm B 10, the guide screw 11 is threadedly connected in the threaded hole, and the guide rod 12 is slidingly connected in the guide hole. A rotating block 13 is arranged on the guide screw 11. By adopting the structure of the application, the motor 2 can drive the output shaft to rotate, the output shaft drives the center rotating shaft 1 to rotate through the first transmission wheel A 3 and the first transmission wheel B 4 cooperating with the first transmission members 7, the center rotating shaft 1 drives the external transmission shaft of the belt line to drive through the second transmission wheel A 5 and the second transmission wheel B 6 cooperating with the second transmission members 8, so that stable transmission is realized; when the external transmission shaft of the belt line is adjusted in height, the first elbow and the second elbow can rotate around the center rotating shaft 1 as a fulcrum, the first elbow can rotate on the output shaft, so that the included angle of the first elbow and the second elbow changes, so that the relative position of the first elbow and the second elbow can be adjusted, and the external transmission shaft of the belt line can be moved up and down within a certain range.

[0018] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A self-adaptive flex-arm transmission structure, characterized by: The motor comprises a first crank arm, a second crank arm, a central rotating shaft, a motor and an output shaft; the output shaft is arranged at the output end of the motor, one end of the first crank arm is rotatably connected to the output shaft, the central rotating shaft is rotatably connected to the other end of the first crank arm, one end of the second crank arm is rotatably connected to the central rotating shaft, the other end of the second crank arm is rotatably connected to an external transmission shaft, a first transmission wheel A is fixedly connected to the output shaft, a first transmission wheel B is fixedly connected to the central rotating shaft, a second transmission wheel A is fixedly connected to the central rotating shaft, and a second transmission wheel B is fixedly connected to the external transmission shaft, a first transmission member is provided on the first transmission wheel A and the first transmission wheel B, and a second transmission member is provided on the second transmission wheel A and the second transmission wheel B.

2. The adaptively adjustable flexarm transmission structure according to claim 1, characterized in that: The first curved arm has the same structure as the second curved arm; the first curved arm includes a fixed arm A and a fixed arm B, and a tensioning mechanism is provided between the fixed arm A and the fixed arm B.

3. The adaptively adjustable flexarm transmission structure according to claim 2, characterized in that: The first transmission member and the second transmission member are both transmission synchronous belts.

4. The adaptively adjustable flexarm transmission structure according to claim 2, characterized in that: The tensioning mechanism includes a guide screw whose end is rotatably connected to the inner end of the fixed arm A and a guide rod fixedly connected to the inner end of the fixed arm A. The guide screw and the guide rod are axially parallel. A threaded hole that matches the guide screw is provided on the fixed arm B. A guide hole that matches the guide rod is provided on the fixed arm B. The guide screw is threadedly connected to the threaded hole, and the guide rod is slidably connected to the guide hole.

5. The adaptively adjustable flexarm transmission structure according to claim 4, characterized in that: A rotating block is provided on the lead screw.

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