Transmission system with two-way input and one-way output

Abstract

The transmission system comprises an input unit, a reciprocating unit, a transmission unit and an output unit, the reciprocating unit comprises a second shaft, a second wheel-shaped piece, a third wheel-shaped piece and a fourth wheel-shaped piece, the second wheel-shaped piece is arranged in the middle of the second shaft in a sleeved mode, and the third wheel-shaped piece and the fourth wheel-shaped piece are fixed to the two ends of the second shaft; the transmission unit comprises a first transmission chain and a second transmission chain, the first transmission chain is meshed with the third wheel-shaped piece, and the second transmission chain is meshed with the fourth wheel-shaped piece; the output unit is meshed with the transmission unit; the system is simple in principle, compact in structure and small in size, the direction of the output unit is always kept unchanged no matter whether the input unit rotates forwards or reversely, the system is particularly suitable for small-size equipment, and the technical problem that a side brush or a rag disc of an existing disc sweeping robot cannot achieve cleaning and outward swinging functions at the same time can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of transmission mechanical structures, in particular to a transmission system with bidirectional input and unidirectional output. Background Art

[0002] The general characteristic of the transmission system is that the rotation direction of the output shaft changes with the driving direction of the driving member. In other words, if the driving member rotates forward or reverse, the output shaft rotates in the opposite direction. Although some transmission systems can keep the direction of the output motion unchanged through the transmission mechanism when the power input direction changes, they often require complex transmission systems, which limits their application in certain occasions. For example, the existing disc sweeping robot has a completely opposite output shaft rotation direction when its internal driving member rotates forward or reverse, which results in the disc sweeping robot's side brush or rag disc being unable to simultaneously achieve cleaning and swing-out functions. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a transmission system with bidirectional input and unidirectional output, comprising:

[0004] Input unit;

[0005] A reciprocating unit is fixedly connected or transmission-connected with the input unit. The reciprocating unit comprises a second shaft, a second wheel-shaped member, a third wheel-shaped member and a fourth wheel-shaped member. The second shaft is sleeved with the second wheel-shaped member in the middle, and the third wheel-shaped member and the fourth wheel-shaped member are fixed at both ends. A motion conversion mechanism is arranged in the middle of the second shaft. Under the driving action of the input unit, the second wheel-shaped member moves linearly relative to the second shaft until the side surface of the second wheel-shaped member abuts against the side surface of the third wheel-shaped member or the side surface of the fourth wheel-shaped member. At this time, the side surface of the second wheel-shaped member cooperates with the inner side surface of the third wheel-shaped member or the inner side surface of the fourth wheel-shaped member to drive the third wheel-shaped member or the fourth wheel-shaped member to rotate;

[0006] The transmission unit comprises a first transmission chain and a second transmission chain, wherein the first transmission chain is meshed with the third wheel-shaped member, and the second transmission chain is meshed with the fourth wheel-shaped member;

[0007] The output unit meshes with the transmission unit.

[0008] Furthermore, the second shaft is fixedly connected to the driving end of the input unit, the second wheel-shaped member is a round nut, and a damping mechanism is arranged near the round nut to increase the damping of the rotation of the round nut, so that the round nut is close to the second shaft to prevent the round nut from idling.

[0009] Furthermore, the input unit includes a driving member, a first shaft and a first wheel-shaped member. The driving end of the driving member is fixedly connected to the first shaft. The first shaft is fixedly connected to the first wheel-shaped member. The driving member drives the first shaft to rotate, and the first shaft then drives the first wheel-shaped member to rotate in the same direction. The second shaft is arranged parallel to the first shaft, and the second wheel-shaped member is meshed with the first wheel-shaped member.

[0010] Furthermore, the first wheel-shaped member and the second wheel-shaped member are both gears, the motion conversion mechanism is a threaded mechanism, and the second shaft is threadedly connected to the second wheel-shaped member through the threaded mechanism.

[0011] Furthermore, the first transmission chain includes a third shaft, a fifth wheel, a fifth shaft and a seventh wheel. The third shaft and the fifth shaft are arranged parallel to the second shaft along the same axis. The fifth wheel is fixed on the third shaft, and the seventh wheel is fixed on the fifth shaft. The two sides of the fifth wheel are respectively meshed with the third wheel and the seventh wheel. The second transmission chain includes a fourth shaft and a sixth wheel. The sixth wheel is fixed on the fourth shaft, and the sixth wheel is meshed with the fourth wheel.

[0012] Furthermore, the output unit includes a sixth shaft and a gear shaft, one end of the sixth shaft is fixedly connected to or integrally formed with the gear shaft, and the gear shaft is meshed with the sixth wheel-shaped member and the seventh wheel-shaped member.

[0013] Furthermore, the output unit also includes an eighth wheel-shaped member, the eighth wheel-shaped member is fixedly connected to the sixth shaft, and the eighth wheel-shaped member is meshed with the sixth wheel-shaped member and the seventh wheel-shaped member.

[0014] Further, the third wheel-shaped member, the fourth wheel-shaped member, the fifth wheel-shaped member, the sixth wheel-shaped member, the seventh wheel-shaped member and the eighth wheel-shaped member are all gears.

[0015] Furthermore, both side surfaces of the second wheel-shaped member and the inner side surfaces of the third wheel-shaped member and the fourth wheel-shaped member are all non-smooth friction surfaces, tooth surfaces or texture structures.

[0016] Furthermore, friction plates are fixedly connected to both side surfaces of the second wheel-shaped member and the inner side surfaces of the third wheel-shaped member and the fourth wheel-shaped member.

[0017] The beneficial effects are: the present application has a simple principle, a compact structure, and a small size. Regardless of whether the input unit rotates forward or reversely, the direction of the output unit remains unchanged after passing through the reciprocating unit and the transmission unit. It is particularly suitable for small-sized devices such as disc sweeping robots, and can solve the technical problem that the side brush or rag disc of the existing disc sweeping robot cannot simultaneously realize the cleaning and outward swing functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0019] Figure 1 This is an illustration of the principle of this application Figure 1 ;

[0020] 1. Input unit; 11. Driving element;

[0021] 2. reciprocating unit; 21. second shaft; 211. motion conversion mechanism; 212. damping mechanism; 22. second wheel-shaped member; 23. third wheel-shaped member; 24. fourth wheel-shaped member; 25. friction plate;

[0022] 3. Transmission unit; 31. Third shaft; 32. Fifth wheel; 33. Fifth shaft; 34. Seventh wheel; 35. Fourth shaft; 36. Sixth wheel;

[0023] 4. Output unit; 41. Sixth shaft; 42. Gear shaft; 43. Eighth wheel-shaped member. DETAILED DESCRIPTION

[0024] The following will disclose multiple embodiments of the present invention with drawings. For the purpose of clear description, many practical details will be described together in the following description. However, it should be understood that these practical details should not be used to limit the present invention. In other words, in some embodiments of the present invention, these practical details are not necessary. In addition, in order to simplify the drawings, some conventional structures and components will be depicted in a simple schematic manner in the drawings.

[0025] It should be noted that all directional indications such as up, down, left, right, front, back... in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0026] In addition, in the present utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present utility model. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0027] Embodiment 1

[0028] See also Figure 1 , Figure 1 This is an illustration of the principle of this application Figure 1As shown in the figure, this embodiment provides a transmission system with bidirectional input and unidirectional output, including an input unit 1, a reciprocating unit 2, a transmission unit 3 and an output unit 4, wherein the reciprocating unit 2 includes a second shaft 21, a second wheel 22, a third wheel 23 and a fourth wheel 24, the second shaft 21 is fixedly connected to the driving end of the input unit 1, at this time, the reciprocating unit 2 is fixedly connected to the input unit 1, the second shaft 21 is sleeved with a second wheel 22 in the middle, and the third wheel 23 and the fourth wheel 24 are fixed at both ends, and the second shaft 21 is provided with a motion conversion mechanism 211 in the middle for converting the second wheel 22 from The rotational motion is converted into linear motion. Under the driving action of the input unit 1, the second wheel 22 moves linearly relative to the second shaft 21 until the side of the second wheel 22 abuts against the side of the third wheel 23 or the side of the fourth wheel 24. At this time, the side of the second wheel 22 cooperates with the inner side of the third wheel 23 or the inner side of the fourth wheel 24 to drive the third wheel 23 or the fourth wheel 24 to rotate; the transmission unit 3 includes a first transmission chain and a second transmission chain, the first transmission chain is meshed with the third wheel 23, and the second transmission chain is meshed with the fourth wheel 24; the output unit 4 is meshed with the transmission unit 3.

[0029] In this embodiment, the input unit 1 includes a driving member 11 and a reduction member. The driving end of the driving member 11 can be directly connected to the second shaft 21 or connected to the second shaft 21 via the reduction member.

[0030] Please refer to Figure 1 The first transmission chain includes a third shaft 31, a fifth wheel 32, a fifth shaft 33 and a seventh wheel 34. The third shaft 31 and the fifth shaft 33 are arranged parallel to the second shaft 21 along the same axis. The fifth wheel 32 is fixed on the third shaft 31, and the seventh wheel 34 is fixed on the fifth shaft 33. The two sides of the fifth wheel 32 are respectively meshed with the third wheel 23 and the seventh wheel 34. The second transmission chain includes a fourth shaft 35 and a sixth wheel 36. The sixth wheel 36 is fixed on the fourth shaft 35, and the sixth wheel 36 is meshed with the fourth wheel 24. The output unit 4 includes a sixth shaft 41 and a gear shaft 42. One end of the sixth shaft 41 is fixedly connected to the gear shaft 42 or integrally formed. The gear shaft 42 is meshed with the sixth wheel 36 and the seventh wheel 34.

[0031] In this embodiment, the second wheel-like member 22 is a round nut. In order to further prevent the round nut from idling, a damping mechanism 212 can be provided near the round nut to increase the damping of the round nut rotation, or a pressing mechanism can be provided near the round nut to make the round nut close to the second shaft 21, thereby ensuring that the round nut can move leftward or rightward relative to the second shaft 21 under the driving action of the input unit 1. The damping mechanism 212 can be a damping wheel or a damping sheet. In addition, the fifth wheel-like member 32 can also be an idler wheel, which is used to change the rotation direction of the front and rear wheel-like members.

[0032] In addition, in order to enable the second wheel 22 to drive the third wheel 23 or the fourth wheel 24 to rotate, both sides of the second wheel 22 and the inner sides of the third wheel 23 and the fourth wheel 24 can be set to non-smooth friction surfaces, tooth surfaces or other texture structures, and friction plates 25 can be fixed on both side surfaces of the second wheel 22 and the inner sides of the third wheel 23 and the fourth wheel 24 to simultaneously increase the friction coefficient between the side surfaces of the second wheel 22 and the inner sides of the third wheel 23 and the fourth wheel 24.

[0033] When the input unit 1 drives the second shaft 21 to rotate, the second wheel 22 moves leftward or rightward relative to the second shaft 21 under the action of the damping mechanism 212 or the clamping mechanism until the side of the second wheel 22 abuts and meshes with the side of the third wheel 23 or the side of the fourth wheel 24. At this time, the second wheel 22 is squeezed and drives the third wheel 23 or the fourth wheel 24 to rotate under the action of friction. When the second wheel 22 drives the third wheel 23 to rotate, the third wheel 23 drives the fifth wheel 32, the seventh wheel 34, and the gear shaft 42 to rotate in sequence through the first transmission chain. When the second wheel 22 drives the fourth wheel 24 to rotate, the fourth wheel 24 drives the sixth wheel 36 and the gear shaft 42 to rotate in sequence through the second transmission chain. In this process, no matter whether the driving member 11 of the input unit 1 rotates forward or reversely, the direction of the output unit 4 remains unchanged after passing through the reciprocating unit 2 and the transmission unit 3, that is, the final rotation direction of the gear shaft 42 is always the same.

[0034] Embodiment 2

[0035] See also Figure 1The present embodiment provides a transmission system with bidirectional input and unidirectional output, comprising an input unit 1, a reciprocating unit 2, a transmission unit 3 and an output unit 4, wherein the reciprocating unit 2 comprises a second shaft 21, a second wheel 22, a third wheel 23 and a fourth wheel 24, the second shaft 21 is sleeved with the second wheel 22 in the middle, and the third wheel 23 and the fourth wheel 24 are fixed at both ends. Specifically, the third wheel 23 and the fourth wheel 24 can be sleeved at both ends of the second shaft 21, or can be rotatably connected to both ends of the second shaft 21 through bearings. The second shaft 21 is a fixed shaft with smooth ends and a motion conversion mechanism 211 in the middle. Furthermore, the motion conversion mechanism 211 is a screw. The second shaft 21 is screwed to the second wheel 22 through a thread mechanism to prevent the second wheel 22 from idling. Under the driving action of the input unit 1, the second wheel 22 moves linearly relative to the second shaft 21 until the side surface of the second wheel 22 abuts against the side surface of the third wheel 23 or the side surface of the fourth wheel 24. At this time, the side surface of the second wheel 22 cooperates with the inner side surface of the third wheel 23 or the inner side surface of the fourth wheel 24 to drive the third wheel 23 or the fourth wheel 24 to rotate; the transmission unit 3 includes a first transmission chain and a second transmission chain, the first transmission chain is meshed with the third wheel 23, and the second transmission chain is meshed with the fourth wheel 24; the output unit 4 is meshed with the transmission unit 3.

[0036] In this embodiment, the input unit 1 includes a driving member 11, a first shaft and a first wheel-shaped member. The driving end of the driving member 11 is fixedly connected to the first shaft, and the first shaft is fixedly connected to the first wheel-shaped member. The driving member 11 drives the first shaft to rotate, and the first shaft then drives the first wheel-shaped member to rotate in the same direction. The second shaft 21 is arranged parallel to the first shaft, and the second wheel-shaped member 22 is meshed with the first wheel-shaped member. At this time, the reciprocating unit 2 is connected to the input unit 1 in transmission.

[0037] Please refer to Figure 1 The first transmission chain includes a third shaft 31, a fifth wheel 32, a fifth shaft 33 and a seventh wheel 34. The third shaft 31 and the fifth shaft 33 are arranged parallel to the second shaft 21 along the same axis. The fifth wheel 32 is fixed on the third shaft 31, and the seventh wheel 34 is fixed on the fifth shaft 33. The two sides of the fifth wheel 32 are respectively meshed with the third wheel 23 and the seventh wheel 34. The second transmission chain includes a fourth shaft 35 and a sixth wheel 36. The sixth wheel 36 is fixed on the fourth shaft 35, and the sixth wheel 36 is meshed with the fourth wheel 24. The output unit 4 includes a sixth shaft 41 and a gear shaft 42. One end of the sixth shaft 41 is fixedly connected to the gear shaft 42 or integrally formed. The gear shaft 42 is meshed with the sixth wheel 36 and the seventh wheel 34.

[0038] In this embodiment, the first wheel, the second wheel 22, the third wheel 23, the fourth wheel 24, the fifth wheel 32, the sixth wheel 36 and the seventh wheel 34 are all gears, and more specifically, spur gears may be selected.

[0039] In addition, in order to enable the second wheel 22 to drive the third wheel 23 or the fourth wheel 24 to rotate, the side surfaces of the second wheel 22 and the inner surfaces of the third wheel 23 and the fourth wheel 24 can be set to non-smooth friction surfaces, tooth surfaces or other texture structures, and friction plates 25 can be fixed on the side surfaces of the second wheel 22 and the inner surfaces of the third wheel 23 and the fourth wheel 24 to simultaneously increase the friction coefficient between the side surfaces of the second wheel 22 and the inner surfaces of the third wheel 23 and the fourth wheel 24.

[0040] When the input unit 1 drives the first shaft to rotate, the first shaft drives the first wheel to rotate. Since the second shaft 21 is fixed and does not rotate and the first wheel is meshed with the second wheel 22, the second wheel 22 can move leftward or rightward relative to the second shaft 21 until the side of the second wheel 22 abuts and meshes with the side of the third wheel 23 or the side of the fourth wheel 24. At this time, the second wheel 22 is squeezed and drives the third wheel 23 or the fourth wheel 24 to rotate under the action of friction. When the second wheel 22 drives the third wheel 23 to rotate, the third wheel 24 23 drives the fifth wheel 32, the seventh wheel 34 and the gear shaft 42 to rotate in sequence through the first transmission chain. When the second wheel 22 drives the fourth wheel 24 to rotate, the fourth wheel 24 drives the sixth wheel 36 and the gear shaft 42 to rotate in sequence through the second transmission chain. In this process, no matter whether the driving member 11 of the input unit 1 rotates forward or reversely, the direction of the output unit 4 remains unchanged after passing through the reciprocating unit 2 and the transmission unit 3. That is to say, the gear shaft 42 can keep the same rotation direction at the end, and the gear shaft 42 is directly connected to the final driving load as the output shaft.

[0041] In summary, both the first and second embodiments can achieve the effect of two-way input and one-way output, with simple principles, compact structure, and small size. Regardless of whether the input unit 1 rotates forward or reversely, the direction of the output unit 4 remains unchanged after passing through the reciprocating unit 2 and the transmission unit 3. It is particularly suitable for small-sized devices such as disc sweeping robots, and can solve the technical problem that the side brush or rag plate of the existing disc sweeping robot cannot simultaneously achieve the cleaning and swing-out functions. Of course, based on the technical principle, other implementation methods are not excluded, but they should all fall within the scope of protection of this application. For example, replacing the gear shaft 42 with a larger eighth wheel-shaped member 43 to transmit power to the final driving load (such as the side brush or rag plate of the disc sweeping robot) can also achieve the technical effect of this application.

[0042] The above is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A transmission system with bidirectional input and unidirectional output, characterized in that: include: Input unit (1); A reciprocating unit (2) is fixedly connected or transmission-connected with the input unit (1), the reciprocating unit (2) comprising a second shaft (21), a second wheel-shaped member (22), a third wheel-shaped member (23) and a fourth wheel-shaped member (24); the second shaft (21) is sleeved with the second wheel-shaped member (22) in the middle, and the third wheel-shaped member (23) and the fourth wheel-shaped member (24) are fixed at both ends; a motion conversion mechanism (211) is provided in the middle of the second shaft (21); under the driving action of the input unit (1), the second wheel-shaped member (22) moves linearly relative to the second shaft (21) until the side surface of the second wheel-shaped member (22) abuts against the side surface of the third wheel-shaped member (23) or the side surface of the fourth wheel-shaped member (24), at which time the side surface of the second wheel-shaped member (22) cooperates with the inner side surface of the third wheel-shaped member (23) or the inner side surface of the fourth wheel-shaped member (24) to drive the third wheel-shaped member (23) or the fourth wheel-shaped member (24) to rotate; A transmission unit (3), comprising a first transmission chain and a second transmission chain, wherein the first transmission chain is meshed with the third wheel-shaped member (23), and the second transmission chain is meshed with the fourth wheel-shaped member (24); The output unit (4) is meshed with the transmission unit (3).

2. The transmission system with bidirectional input and unidirectional output according to claim 1, characterized in that: The second shaft (21) is fixedly connected to the driving end of the input unit (1); the second wheel-shaped member (22) is a round nut; and a damping mechanism (212) is arranged near the round nut to increase the damping of the rotation of the round nut.

3. The transmission system with bidirectional input and unidirectional output according to claim 1, characterized in that: The input unit (1) comprises a driving member (11), a first shaft and a first wheel-shaped member, wherein the driving end of the driving member (11) is fixedly connected to the first shaft, the first shaft is fixedly connected to the first wheel-shaped member, the driving member (11) drives the first shaft to rotate, and the first shaft in turn drives the first wheel-shaped member to rotate in the same direction, the second shaft (21) is arranged parallel to the first shaft, and the second wheel-shaped member (22) is meshed with the first wheel-shaped member.

4. The transmission system with bidirectional input and unidirectional output according to claim 3, characterized in that: The first wheel-shaped member and the second wheel-shaped member (22) are both gears, the motion conversion mechanism (211) is a threaded mechanism, and the second shaft (21) is threadedly connected to the second wheel-shaped member (22) via the threaded mechanism.

5. The transmission system with bidirectional input and unidirectional output according to claim 1, characterized in that: The first transmission chain comprises a third shaft (31), a fifth wheel (32), a fifth shaft (33) and a seventh wheel (34); the third shaft (31) and the fifth shaft (33) are arranged parallel to the second shaft (21) along the same axis; the fifth wheel (32) is fixed on the third shaft (31); the seventh wheel (34) is fixed on the fifth shaft (33); the two sides of the fifth wheel (32) are respectively meshed with the third wheel (23) and the seventh wheel (34); the second transmission chain comprises a fourth shaft (35) and a sixth wheel (36); the sixth wheel (36) is fixed on the fourth shaft (35); and the sixth wheel (36) is meshed with the fourth wheel (24).

6. The transmission system with bidirectional input and unidirectional output according to claim 5, characterized in that: The output unit (4) comprises a sixth shaft (41) and a gear shaft (42); one end of the sixth shaft (41) is fixedly connected to or integrally formed with the gear shaft (42); and the gear shaft (42) is meshed with the sixth wheel-shaped member (36) and the seventh wheel-shaped member (34).

7. The transmission system with bidirectional input and unidirectional output according to claim 6, characterized in that: The output unit (4) further comprises an eighth wheel-shaped member (43), the eighth wheel-shaped member (43) being fixedly connected to the sixth shaft (41), and the eighth wheel-shaped member (43) being meshed with the sixth wheel-shaped member (36) and the seventh wheel-shaped member (34).

8. The transmission system with bidirectional input and unidirectional output according to claim 7, characterized in that: The third wheel (23), the fourth wheel (24), the fifth wheel (32), the sixth wheel (36), the seventh wheel (34) and the eighth wheel (43) are all gears.

9. The transmission system with bidirectional input and unidirectional output according to claim 1, characterized in that: The two side surfaces of the second wheel-shaped member (22) and the inner side surface of the third wheel-shaped member (23) and the inner side surface of the fourth wheel-shaped member (24) are all non-smooth friction surfaces, tooth surfaces or texture structures.

10. The transmission system with bidirectional input and unidirectional output according to claim 1, characterized in that: Friction plates (25) are fixedly connected to both side surfaces of the second wheel-shaped member (22) and the inner side surfaces of the third wheel-shaped member (23) and the fourth wheel-shaped member (24).

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