Reciprocating type transmission mechanism and reciprocating type equipment

Abstract

The reciprocating type transmission mechanism comprises a driving belt wheel, a driven belt wheel, a transmission belt and at least two fixing assemblies, the driving belt wheel is arranged in a reciprocating rotation mode, the rotation angle of the driving belt wheel is smaller than 360 degrees, the driving belt wheel is connected with the driven belt wheel through the transmission belt so as to drive the driven belt wheel to rotate synchronously, and the fixing assemblies are arranged on the driving belt wheel. At least two installation points are distributed on the transmission belt, the driving belt wheel is fixedly connected with one installation point through one fixing assembly, and the driven belt wheel is fixedly connected with the other installation point through the other fixing assembly. According to the reciprocating type transmission mechanism and the reciprocating type equipment, the problem that return difference exists when an existing mechanical transmission mechanism conducts forward and reverse reciprocating motion is solved.

Description

Technical Field

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

[0002] Commonly used mechanical transmission methods include belt drives, chain drives, and toothed belt drives. Belt drives are a common type of mechanical transmission that transmits power and motion through the meshing of toothed pulleys. Belt drives use a flexible belt to connect two or more pulleys, transmitting power and motion through the friction or meshing force between the belt and pulleys. Chain drives use a chain to connect two or more chain pulleys, transmitting power and motion through the meshing of chain links with the teeth of the chain pulleys.

[0003] Gear belt drives offer advantages such as accurate and stable transmission ratios, high efficiency, high reliability, and long service life. They can transmit power between parallel shafts, shafts intersecting at any angle, and shafts with arbitrary angles. However, they require high manufacturing and installation precision, are costly, exhibit backlash during forward and reverse rotation, and are unsuitable for long-distance transmission between two shafts. Belt drives are simple and generate little noise, but are prone to slippage, leading to backlash. Chain drives offer high efficiency and transmit large power, but their transmission ratios are unstable and they also exhibit backlash during forward and reverse rotation. Therefore, all existing mechanical transmission methods suffer from backlash issues during reciprocating motion. Utility Model Content

[0004] The main purpose of this utility model is to propose a reciprocating transmission mechanism and reciprocating equipment, which aims to solve the problem of backlash in existing mechanical transmission mechanisms during forward and reverse reciprocating motion.

[0005] To achieve the above objectives, this utility model proposes a reciprocating transmission mechanism, comprising a driving pulley, a driven pulley, a transmission belt, and at least two fixed components. The driving pulley is configured to reciprocate and rotate at an angle less than 360°. The driving pulley is connected to the driven pulley via the transmission belt to drive the driven pulley to rotate synchronously. At least two mounting points are distributed on the transmission belt. The driving pulley is fixedly connected to one of the mounting points via one of the fixed components, and the driven pulley is fixedly connected to the other mounting point via another fixed component.

[0006] According to some embodiments of the present invention, the transmission belt includes a first connecting segment, a main body segment, and a second connecting segment connected end to end in sequence, wherein the end of the first connecting segment away from the main body segment is detachably connected to the end of the second connecting segment away from the main body segment.

[0007] According to some embodiments of the present invention, a tensioning assembly is also included, the tensioning assembly including a tensioning screw and two connecting blocks, the two connecting blocks being respectively connected to the first connecting segment and the second connecting segment, the tensioning screw being connected to one of the connecting blocks and being threadedly connected to the other connecting block.

[0008] According to some embodiments of the present invention, mounting points are distributed on both the first connecting segment and the second connecting segment, and two fixing components are provided on the driven pulley. The driven pulley is fixedly connected to the mounting points on the first connecting segment and the second connecting segment respectively through the two fixing components.

[0009] According to some embodiments of the present invention, the fixing component includes a locking part and an abutting part. The abutting part abuts against the transmission belt. A first connecting hole is provided on the transmission belt, and a second connecting hole is provided on the abutting part, so that the locking part passes through the second connecting hole and the first connecting hole in sequence and is threadedly connected to the driving pulley or the driven pulley.

[0010] According to some embodiments of the present invention, the abutting part has an abutting groove on the side facing the transmission belt, so that the transmission belt can extend into the abutting groove and abut against the bottom of the groove. The abutting groove has a limiting wall that restricts the axial movement of the transmission belt in each pulley.

[0011] According to some embodiments of the present invention, the abutting part has an abutting surface that abuts against the transmission belt, and the abutting surface is arc-shaped so that the abutting surface fits against the outer side of the transmission belt.

[0012] According to some embodiments of the present invention, an idler pulley is also included, which can rotatably abut against the outer side of the transmission belt. The transmission belt located between the driving pulley and the driven pulley is recessed inward under the abutment of the idler pulley, so as to increase the contact area between the transmission belt and each pulley.

[0013] According to some embodiments of the present invention, there are two idler wheels, and the two idler wheels respectively rotate and abut against the outer side of the transmission belt located on both sides of the driven pulley.

[0014] In addition, this utility model also provides a reciprocating device, including a device body, a forward and reverse motor, a reciprocating rotating component, and a reciprocating transmission mechanism as described in any one of the above. The drive shaft of the forward and reverse motor is connected to the shaft of the driving pulley. The driven pulley is mounted on the device body through a bearing. The reciprocating rotating component is disposed on the driven pulley to rotate synchronously with the driven pulley.

[0015] This utility model has at least the following beneficial effects:

[0016] In this invention, the driving pulley is configured to reciprocate with a rotation angle less than 360°. The driving pulley is connected to the driven pulley via a transmission belt to drive the driven pulley to rotate synchronously. The transmission belt has at least two mounting points. The driving pulley is fixedly connected to one of the mounting points via a fixing component, and the driven pulley is fixedly connected to the other mounting point via another fixing component. The driving pulley reciprocates within a limited angle to drive the driven pulley to reciprocate within a limited angle. If transmission relies solely on the friction between the transmission belt and the pulleys, slippage will occur due to the belt's inertia, leading to backlash. This invention uses two fixing components to fix the two mounting points on the transmission belt to the driving pulley and the driven pulley respectively, thus limiting the movement of the transmission belt relative to the driving and driven pulleys and preventing backlash. The reciprocating transmission mechanism and reciprocating device provided by this invention solve the problem of backlash in existing mechanical transmission mechanisms during forward and reverse reciprocating motion. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of a reciprocating transmission mechanism provided for an embodiment of this utility model;

[0019] Figure 2 for Figure 1 A cross-sectional view of the reciprocating transmission mechanism after removing the idler wheel;

[0020] Figure 3 for Figure 1 A schematic diagram of the transmission belt structure.

[0021] Explanation of reference numerals in the attached figures:

[0022] 100 - Reciprocating transmission mechanism; 1 - Driving pulley; 2 - Driven pulley; 3 - Transmission belt; 31 - First connecting section; 32 - Main body section; 33 - Second connecting section; 34 - First connecting hole; 4 - Fixing component; 41 - Locking part; 42 - Abutting part; 421 - Second connecting hole; 5 - Tensioning component; 51 - Tensioning screw; 52 - Connecting block; 6 - Idler pulley. Detailed Implementation

[0023] The technical solutions in the embodiments of this utility model are described clearly and completely below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0025] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0026] This utility model provides a reciprocating transmission mechanism. Figures 1 to 3 This invention provides a specific embodiment of a reciprocating transmission mechanism.

[0027] like Figure 1 As shown, this utility model embodiment provides a reciprocating transmission mechanism 100, including a driving pulley 1, a driven pulley 2, a transmission belt 3, and at least two fixed components 4. The driving pulley 1 is arranged to reciprocate, and the rotation angle is less than 360°. The driving pulley 1 is connected to the driven pulley 2 through the transmission belt 3 to drive the driven pulley 2 to rotate synchronously. At least two mounting points are distributed on the transmission belt 3. The driving pulley 1 is fixedly connected to one of the mounting points through one of the fixed components 4, and the driven pulley 2 is fixedly connected to the other mounting point through another fixed component 4.

[0028] In this invention, the driving pulley 1 is configured to reciprocate with a rotation angle less than 360°. The driving pulley 1 is connected to the driven pulley 2 via the transmission belt 3 to drive the driven pulley 2 to rotate synchronously. The transmission belt 3 has at least two mounting points. The driving pulley 1 is fixedly connected to one of the mounting points via a fixing component 4, and the driven pulley 2 is fixedly connected to the other mounting point via another fixing component 4. The driving pulley 1 reciprocates within a limited angle to drive the driven pulley 2 to reciprocate within a limited angle. If transmission relies solely on the friction between the transmission belt 3 and the pulleys, slippage will occur due to the inertia of the transmission belt 3, leading to backlash. This invention uses two fixing components 4 to fix the two mounting points on the transmission belt 3 to the driving pulley 1 and the driven pulley 2 respectively, thereby limiting the movement of the transmission belt 3 relative to the driving pulley 1 and the driven pulley 2 and preventing backlash. The reciprocating transmission mechanism 100 and reciprocating equipment provided by this utility model solve the problem of backlash in existing mechanical transmission mechanisms during forward and reverse reciprocating motion.

[0029] It should be noted that the transmission belt 3 is a steel belt, and the two mounting points on the transmission belt 3 can be directly welded to the driving pulley 1 and the driven pulley 2 respectively to achieve the effect of fixed connection of the fixing component 4.

[0030] Specifically, the axis of rotation of the driving pulley 1 is parallel to the axis of rotation of the driven pulley 2.

[0031] The specific structure of the transmission belt 3 is not limited, as long as the driving pulley 1 is connected to the driven pulley 2 via the transmission belt 3. For example, in some embodiments, such as... Figure 2 and Figure 3 As shown, the transmission belt 3 includes a first connecting section 31, a main body section 32, and a second connecting section 33 connected end to end in sequence. The end of the first connecting section 31 away from the main body section 32 is detachably connected to the end of the second connecting section 33 away from the main body section 32. With this configuration, compared to a one-piece molded annular steel belt, the transmission belt 3 is formed by detachably connecting the ends of a single steel belt, allowing it to accommodate more sizes of the driving pulley 1 and the driven pulley 2.

[0032] To prevent the transmission belt 3 from springing back during operation, in some embodiments, such as Figure 2 and Figure 3As shown, the reciprocating transmission mechanism 100 further includes a tensioning assembly 5, which includes a tensioning screw 51 and two connecting blocks 52. The two connecting blocks 52 are respectively connected to the first connecting segment 31 and the second connecting segment 33. The tensioning screw 51 is connected to one of the connecting blocks 52 and to the other connecting block 52 via a threaded connection. With this configuration, by turning the tensioning screw 51, the distance between the two connecting blocks 52 can be adjusted, thereby adjusting the distance between the first connecting segment 31 and the second connecting segment 33, achieving pre-tensioning of the transmission belt 3 and preventing the transmission belt 3 from springing back during operation.

[0033] Furthermore, in some embodiments, such as Figure 2 As shown, mounting points are distributed on both the first connecting segment 31 and the second connecting segment 33. Two fixing components 4 are provided on the driven pulley 2. The driven pulley 2 is fixedly connected to the mounting points on the first connecting segment 31 and the second connecting segment 33 respectively through the two fixing components 4. This arrangement ensures that both the first connecting segment 31 and the second connecting segment 33 are fixed to the driven pulley 2, preventing slippage and backlash in the first connecting segment 31 or the second connecting segment 33 of the transmission belt 3 due to the inertia of the transmission belt 3 during reciprocating rotation of the driven pulley 2.

[0034] The specific structure of the fixing component 4 is not limited, as long as it ensures that the fixing component 4 can fix the transmission belt 3 to the driving pulley 1 and the driven pulley 2. In some embodiments, such as... Figure 2 and Figure 3 As shown, the fixing component 4 includes a locking part 41 and an abutting part 42. The abutting part 42 abuts against the transmission belt 3. The transmission belt 3 has a first connecting hole 34, and the abutting part 42 has a corresponding second connecting hole 421, so that the locking part 41 passes through the second connecting hole 421 and the first connecting hole 34 in sequence and is threadedly connected to the driving pulley 1 or the driven pulley 2. If the pressure of the abutting part 42 on the transmission belt 3 is too small, it may cause slight backlash in the transmission belt 3. If the pressure is too large, it may cause deformation of the transmission belt 3. Therefore, by turning the locking part 41, the pressure of the abutting part 42 on the transmission belt 3 can be adjusted so that the pressure is within a suitable range.

[0035] Specifically, the abutting part 42 adopts a flanged process to prevent the abutting part 42 from rotating when the locking part 41 is turned, which would prevent the locking part 41 from being tightened and thus increase the pressure of the abutting part 42 on the transmission belt 3.

[0036] Furthermore, in some embodiments, such as Figure 1As shown, the abutting part 42 has an abutting groove on the side facing the transmission belt 3, so that the transmission belt 3 can extend into the abutting groove and abut against the bottom of the groove. The abutting groove has a limiting wall that restricts the axial movement of the transmission belt 3 on each pulley. With this configuration, the limiting wall in the abutting groove can restrict the axial movement of the transmission belt 3 on each pulley, avoiding axial slippage.

[0037] Specifically, in some embodiments, the abutting portion 42 has an abutting surface that abuts against the transmission belt 3. The abutting surface is arc-shaped so that it fits against the outer surface of the transmission belt 3. This configuration increases the contact area between the abutting portion 42 and the transmission belt 3, thereby increasing friction and preventing slight backlash. It also prevents deformation of the transmission belt 3 if the pressure exerted by the abutting portion 42 on the transmission belt 3 is too high.

[0038] To increase the working angle range of the driven pulley 2, in some embodiments, such as Figure 1 As shown, the reciprocating transmission mechanism 100 also includes an idler wheel 6 that can rotatably abut against the outer surface of the transmission belt 3. The transmission belt 3, located between the driving pulley 1 and the driven pulley 2, is recessed inwards under the contact of the idler wheel 6 to increase the contact area between the transmission belt 3 and each pulley. Since the transmission belt 3 is fixedly connected to the driving pulley 1 and the driven pulley 2, the driving pulley 1 and the driven pulley 2 can only reciprocate within the range of contact with the transmission belt 3. By setting the idler wheel 6 to abut against the transmission belt 3, the transmission belt 3 is recessed inwards, increasing the contact area between the transmission belt 3 and the driven pulley 2, thereby increasing the reciprocating rotation angle of the driven pulley 2, which is equivalent to increasing the working angle range of the driven pulley 2.

[0039] Furthermore, in some embodiments, two idler pulleys 6 are provided, and the two idler pulleys 6 respectively rotatably abut against the outer surfaces of the transmission belts 3 located on both sides of the driven pulley 2. By increasing the number of idler pulleys 6, the transmission belts 3 on both sides of the driven pulley 2 are concave inward, thereby increasing the contact area between the transmission belts 3 and the driven pulley 2, and thus increasing the angle of reciprocating rotation of the driven pulley 2, which is equivalent to increasing the working angle range of the driven pulley 2.

[0040] In addition, this utility model also provides a reciprocating device, including a device body, a forward and reverse motor, a reciprocating rotating component and the reciprocating transmission mechanism 100. The drive shaft of the forward and reverse motor is connected to the shaft of the driving pulley 1. The driven pulley 2 is mounted on the device body through a bearing. The reciprocating rotating component is disposed on the driven pulley 2 so as to rotate synchronously with the driven pulley 2.

[0041] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A reciprocating transmission mechanism, characterized in that, It includes a driving pulley, a driven pulley, a transmission belt, and at least two fixed components. The driving pulley is configured to reciprocate and rotate at an angle of less than 360°. The driving pulley is connected to the driven pulley via the transmission belt to drive the driven pulley to rotate synchronously. The transmission belt has at least two mounting points. The driving pulley is fixedly connected to one of the mounting points via one of the fixed components, and the driven pulley is fixedly connected to the other mounting point via another fixed component.

2. The reciprocating transmission mechanism as described in claim 1, characterized in that, The transmission belt includes a first connecting segment, a main body segment, and a second connecting segment connected end to end in sequence. The end of the first connecting segment away from the main body segment is detachably connected to the end of the second connecting segment away from the main body segment.

3. The reciprocating transmission mechanism as described in claim 2, characterized in that, It also includes a tensioning assembly, which includes a tensioning screw and two connecting blocks. The two connecting blocks are respectively connected to the first connecting segment and the second connecting segment. The tensioning screw is connected to one of the connecting blocks and is threaded to the other connecting block.

4. The reciprocating transmission mechanism as described in claim 3, characterized in that, Mounting points are distributed on both the first connecting segment and the second connecting segment. Two fixing components are provided on the driven pulley. The driven pulley is fixedly connected to the mounting points on the first connecting segment and the second connecting segment respectively through the two fixing components.

5. The reciprocating transmission mechanism as described in claim 1, characterized in that, The fixing component includes a locking part and an abutting part. The abutting part abuts against the transmission belt. A first connecting hole is provided on the transmission belt, and a second connecting hole is provided on the abutting part, so that the locking part passes through the second connecting hole and the first connecting hole in sequence and is threadedly connected to the driving pulley or the driven pulley.

6. The reciprocating transmission mechanism as described in claim 5, characterized in that, The abutting part has an abutting groove on the side facing the transmission belt, so that the transmission belt can extend into the abutting groove and abut against the bottom of the groove. The abutting groove has a limiting wall that restricts the axial movement of the transmission belt in each pulley.

7. The reciprocating transmission mechanism as described in claim 5, characterized in that, The abutting part has an abutting surface that abuts against the transmission belt. The abutting surface is arc-shaped so that it fits against the outer side of the transmission belt.

8. The reciprocating transmission mechanism as described in claim 1, characterized in that, It also includes an idler pulley that can rotatably abut against the outer side of the transmission belt. The transmission belt located between the driving pulley and the driven pulley is recessed inward under the contact of the idler pulley to increase the contact area between the transmission belt and each pulley.

9. The reciprocating transmission mechanism as described in claim 8, characterized in that, The idler pulleys are provided in two parts, and the two idler pulleys respectively rotate and abut against the outer side of the transmission belt located on both sides of the driven pulley.

10. A reciprocating device, characterized in that, The device includes a main body, a reversible motor, a reciprocating rotating component, and a reciprocating transmission mechanism as described in any one of claims 1 to 9. The drive shaft of the reversible motor is connected to the shaft of the driving pulley. The driven pulley is mounted on the main body via bearings. The reciprocating rotating component is disposed on the driven pulley to rotate synchronously with the driven pulley.

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