transmission mechanism

Abstract

This utility model relates to a transmission mechanism, including a frame, a power source mounted on the frame, and a driving wheel and a driven wheel that rotate in both directions. At least two transmission belts are connected to the driving wheel and the driven wheel, with each belt pulling a single wheel. This utility model uses driving and driven wheels that are directly connected to each other, eliminating gaps and free rotation between the transmission components. Compared with existing two-dimensional displacement adjustment mechanisms, it achieves higher transmission accuracy. This utility model eliminates relative displacement or movement between components, reducing particulate contaminants generated during transmission.

Description

Technical Field

[0001] This utility model relates to the field of parallel shaft transmission technology, and in particular to a transmission mechanism. Background Technology

[0002] In motion systems, parallel shaft transmission mechanisms such as gears are often used to transmit power. Power is transmitted through gear coupling.

[0003] Parallel shaft transmission mechanisms, as an important branch of transmission systems, are widely used in industries such as industry, automobiles, and home appliances due to their compact structure and stable transmission characteristics. Specifically, they refer to mechanisms where the input and output shafts are parallel, transmitting power, speed, and torque through specific transmission elements. Their design and selection directly affect the efficiency, accuracy, and lifespan of the mechanical system.

[0004] In parallel shaft transmission mechanisms such as gears, backlash exists during coupling. Backlash is essentially a tiny gap between the teeth of the driving and driven gears during meshing. When the driving gear begins to rotate, it must first complete the idle stroke corresponding to the backlash before contacting the driven gear teeth and transmitting power. This results in low transmission efficiency and poor following accuracy.

[0005] Backlash causes the contact area on the tooth surface to concentrate at the tooth tip or root, resulting in a sudden increase in contact stress. Once this exceeds the fatigue limit of the tooth surface material, it can lead to wear problems such as pitting and scuffing. On the other hand, as wear intensifies, metal from the tooth surface will flake off, forming micron- to submicron-sized metal particle contaminants. These particles will mix into the lubricating oil in the gearbox, exacerbating the wear of other gears and bearings. Utility Model Content

[0006] This application addresses the shortcomings of existing production technologies by providing a structurally sound transmission mechanism, thereby solving the problems of insufficient precision and particulate contaminants generated during operation in existing parallel shaft transmission mechanisms such as gears.

[0007] The technical solution adopted in this utility model is as follows:

[0008] A transmission mechanism includes a frame, a power source mounted on the frame, and a driving pulley and a driven pulley that rotate in both directions. At least two transmission belts are connected to the driving pulley and the driven pulley.

[0009] A single drive belt pulls a single wheel; the relative displacement between the drive belt and the driving wheel, and between the drive belt and the driven wheel, is 0.

[0010] As a further improvement to the above technical solution:

[0011] Each drive belt is an open-loop belt.

[0012] One end of each drive belt is connected to the driving pulley, and the other end is connected to the driven pulley.

[0013] Both the driving wheel and the driven wheel have mounting recesses, and the end of the transmission belt is fastened to the mounting recess.

[0014] The mounting recess is recessed and set on either end face of the driving wheel or the driven wheel, and the mounting recess extends to the circumferential contour of the driving wheel or the driven wheel.

[0015] There are two mounting recesses on the same wheel, which are formed on the two end faces of the wheel respectively.

[0016] The mounting recesses on the same wheel are staggered axially.

[0017] Each mounting recess includes:

[0018] The first side wall is equipped with mounting nails.

[0019] The second sidewall is set perpendicular to the first sidewall.

[0020] The bottom wall is connected between the first side wall and the second side wall, and the bottom wall is set perpendicular to the axial direction.

[0021] The end of the transmission belt is flat against the surface of the first side wall and is secured and limited by mounting nails.

[0022] The transmission belt is a rigid belt.

[0023] The beneficial effects of this utility model are as follows:

[0024] This invention uses a driving wheel and a driven wheel that are directly connected to each other, replacing the conventional parallel shaft transmission mechanism. There are no gaps between the transmission components, and all movements can be completely transmitted to the next component without idling. Compared with the existing two-dimensional displacement adjustment mechanism, the transmission accuracy is higher.

[0025] This invention eliminates the relative displacement or movement between components, thus preventing friction and wear and reducing particulate contaminants generated during transmission. Attached Figure Description

[0026] Figure 1 Color illustration of the overall structure of this utility model.

[0027] Figure 2 This is a perspective view of the transmission mechanism of this utility model.

[0028] Figure 3 This is a perspective view of the transmission mechanism of this utility model from another angle.

[0029] Figure 4 for Figure 3The enlarged view of part A is used to illustrate the structure of the recessed installation.

[0030] Figure 5 This is a schematic diagram of the structure of the hidden transmission belt for the driving wheel and driven wheel of this utility model.

[0031] Figure 6 This is a schematic diagram of the structure of the hidden transmission belt for the driving wheel and driven wheel of this utility model.

[0032] The components include: 1. Frame; 2. Motor; 3. Drive wheel; 4. Driven wheel; 5. First transmission belt; 6. Second transmission belt; 7. Bottom wall; 8. First side wall; 9. Second side wall; 10. Mounting pin; 11. Bearing;

[0033] 301. First end face; 302. Second end face; 303. First mounting recess; 304. Second mounting recess;

[0034] 401. Third mounting recess; 402. Fourth mounting recess. Detailed Implementation

[0035] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0036] like Figures 1-6 As shown, the transmission mechanism of this embodiment includes a frame 1, a power source mounted on the frame 1, and a driving wheel 3 and a driven wheel 4 that rotate in both directions. At least two transmission belts are connected to the driving wheel 3 and the driven wheel 4.

[0037] A single drive belt pulls a single pulley; the relative displacement between the drive belt and the driving pulley 3, and between the drive belt and the driven pulley 4, is 0.

[0038] Each drive belt is an open-loop belt.

[0039] One end of each drive belt is connected to the driving pulley 3, and the other end is connected to the driven pulley 4.

[0040] Both the driving pulley 3 and the driven pulley 4 have mounting recesses, and the end of the transmission belt is fastened to the mounting recess.

[0041] The mounting recess is recessed and set on either end face of the driving wheel 3 or the driven wheel 4, and extends to the circumferential contour of the driving wheel 3 or the driven wheel 4.

[0042] There are two mounting recesses on the same wheel, which are formed on the two end faces of the wheel respectively.

[0043] The mounting recesses on the same wheel are staggered axially.

[0044] Each mounting recess includes:

[0045] The first sidewall 8 is provided with mounting nails 10.

[0046] The second sidewall 9 is set perpendicular to the first sidewall 8.

[0047] The bottom wall 7 is connected between the first side wall 8 and the second side wall 9, and the bottom wall 7 is set perpendicular to the axial direction.

[0048] The end of the transmission belt is flat against the surface of the first side wall 8 and is fastened and limited by the mounting nail 10.

[0049] The transmission belt is a rigid belt.

[0050] The specific structure and working principle of this utility model are as follows:

[0051] like Figure 1 The image shown is a color illustration of a model with motor 2 configured on the transmission mechanism, used to facilitate understanding of the final product design.

[0052] Reference Figure 2 and Figure 3 The key design feature of this application is the use of a driving wheel 3, a driven wheel 4, and two transmission belts to form a high-precision, low-wear transmission mechanism for reciprocating motion in both directions.

[0053] like Figures 1-3 As shown, frame 1 serves as the mounting base, on which a driving wheel 3 and a driven wheel 4 are rotatably connected. The driving wheel 3 and the driven wheel 4 have the same diameter to ensure that there is no change in linear velocity during forward and reverse rotation. The driving wheel 3 and the driven wheel 4 also have the same axial thickness, and two drive belts are wound around the driving wheel 3 and the driven wheel 4.

[0054] by Figure 2 The following is a detailed explanation using an example. The side of the drive wheel 3 facing the frame 1 is named the first end face 301, and the side of the two drive wheels 3 facing away from the frame 1 is named the second end face 302. A first mounting recess 303 and a second mounting recess 304 are formed on the outer circumference surface of the drive wheel 3. The first mounting recess 303 and the second mounting recess 304 can be considered as a groove structure.

[0055] The first mounting recess 303 can be regarded as a countersunk groove opened on the first end face 301, and the first mounting recess 303 extends to the outer circle contour of the drive wheel 3, forming a fan-shaped countersunk groove. The groove depth of the first mounting recess 303 in the axial direction of the drive wheel 3 is not greater than half the thickness of the drive wheel 3.

[0056] The second mounting recess 304 can be regarded as a countersunk groove opened on the second end face 302, and the second mounting recess 304 extends to the outer circle contour of the drive wheel 3, forming a fan-shaped countersunk groove. The groove depth of the second mounting recess 304 in the axial direction of the drive wheel 3 is no greater than half the thickness of the drive wheel 3.

[0057] The central angle formed between the first mounting recess 303, the second mounting recess 304, and the axis of the drive wheel 3 is less than 90°. Acute angles such as 45° and 60° can be used.

[0058] Thus, the first mounting recess 303 and the second mounting recess 304 are offset from each other in the axial direction on the outer circumferential surface of the drive wheel 3.

[0059] Symmetrically, a third mounting recess 401 and a fourth mounting recess 402 are provided on the driven wheel 4, so that the structure of the driven wheel 4 is consistent with that of the driving wheel 3.

[0060] The first mounting recess 303 and the second mounting recess 304 of the driving wheel 3 are placed opposite to the third mounting recess 401 and the fourth mounting recess 402 of the driven wheel 4, forming... Figure 2 As shown, after installation on rack 1, in the initial state, the first mounting recess 303 and the third mounting recess 401 are in the same horizontal plane, and the second mounting recess 304 and the fourth mounting recess 402 are in the same horizontal plane. The first mounting recess 303 and the second mounting recess 304 are in the same vertical plane, and the third mounting recess 401 and the fourth mounting recess 402 are in the same vertical plane.

[0061] by Figure 2 Taking the middle position as an example, one end of the first transmission belt 5 is fixed at the first mounting recess 303, the first transmission belt 5 is wound counterclockwise around the drive wheel 3 and pulled toward the third mounting recess 401, and the end of the first transmission belt 5 is fixed at the third mounting recess 401.

[0062] One end of the second drive belt 6 is fixed at the second mounting recess 304. The second drive belt 6 is then wound counterclockwise around the drive wheel 3 and pulled toward the fourth mounting recess 402. The end of the second drive belt 6 is then fixed at the fourth mounting recess 402.

[0063] At this point, the first transmission belt 5 and the second transmission belt 6 have also been installed, forming an intersecting X shape in the initial state.

[0064] Reference Figure 4 There are four connection points for the two transmission belts, and the installation structure is the same. The third installation recess 401 is used as an example for enlarged explanation.

[0065] Each mounting recess has two sidewalls parallel to the axial direction and a bottom wall 7 perpendicular to the axis. The mounting pin 10 is located on the first sidewall 8, and the second sidewall 9 is unoccupied. The junction between the first sidewall 8 and the outer contour of the driven wheel 4 is rounded to reduce wear on the transmission belt. The mounting pin 10 is positioned in the middle of the first sidewall 8, with a certain gap between it and the rounded edge. This design increases the contact area between the transmission belt and the first sidewall 8. When the driving wheel 3 and the driven wheel 4 rotate, the portion of the transmission belt that is flat against the first sidewall 8 is subjected to tension acting on the entire flat surface, and part of the tension is buffered by the rounded edge. The load on the mounting pin 10 is relatively small and it is not easily pulled.

[0066] During transmission, when motor 2 rotates 180° clockwise, the driven wheel 4 is pulled by the first transmission belt 5 and moves 180° accordingly. When motor 2 rotates 180° counterclockwise, the driven wheel 4 is pulled by the second transmission belt 6 and moves 180° accordingly.

[0067] As a further optimization of this solution, a bearing 11, bushing, or other structure can be installed between the driven wheel 4 and the frame 1 to reduce the frictional resistance generated by rotation.

[0068] In one embodiment of this solution, both the first transmission belt 5 and the second transmission belt 6 are made of rigid materials, such as steel belts and steel wire ropes, and there is no transmission error between the driving wheel 3 and the driven wheel 4; there is no relative slippage between the transmission belt and the driving wheel 3 and the driven wheel 4, and almost no particulate pollutants are generated.

[0069] The above description is an explanation of the present utility model and not a limitation thereof. The scope of the present utility model is defined by the claims. Within the protection scope of the present utility model, any form of modification may be made.

Claims

1. A transmission mechanism comprising a frame (1), a power source mounted on the frame (1), characterized in that: It includes a driving wheel (3) and a driven wheel (4) that rotate in both directions, and at least two transmission belts are connected to the driving wheel (3) and the driven wheel (4). A single drive belt pulls a single wheel; the relative displacement between the drive belt and the driving wheel (3) and between the drive belt and the driven wheel (4) is 0.

2. The transmission mechanism of claim 1, wherein: Each drive belt is an open-loop belt.

3. The transmission mechanism of claim 2, wherein: One end of each drive belt is connected to the driving pulley (3), and the other end is connected to the driven pulley (4).

4. The transmission of claim 2, wherein: Both the driving wheel (3) and the driven wheel (4) have mounting recesses, and the end of the transmission belt is fastened to the mounting recess.

5. The transmission mechanism of claim 4, wherein: The mounting recess is provided on either end face of the driving wheel (3) or the driven wheel (4), and the mounting recess extends to the circumferential contour of the driving wheel (3) or the driven wheel (4).

6. The transmission mechanism of claim 5, wherein: There are two mounting recesses on the same wheel, which are formed on the two end faces of the wheel respectively.

7. The transmission mechanism of claim 6, wherein: The mounting recesses on the same wheel are staggered axially.

8. The transmission mechanism of claim 6, wherein: Each mounting recess includes: The first sidewall (8) is provided with mounting nails (10). The second sidewall (9) is set perpendicular to the first sidewall (8). The bottom wall (7) is connected between the first side wall (8) and the second side wall (9), and the bottom wall (7) is set perpendicular to the axial direction.

9. The transmission mechanism of claim 8, wherein: The end of the transmission belt is flat against the surface of the first side wall (8) and is fastened and limited by the mounting nail (10).

10. The transmission of claim 1, wherein: The transmission belt is a rigid belt.

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