Small coaxial double-transmission mechanism

Abstract

The utility model discloses a small coaxial double-transmission mechanism. The small coaxial double-transmission mechanism comprises a shell and a two-way transmission structure arranged in the shell. The bidirectional transmission structure comprises a first transmission assembly and a second transmission assembly and further comprises an input shaft and an output shaft, the input shaft is connected with the second transmission assembly, the output shaft is connected with the first transmission assembly, and the first transmission assembly and the second transmission assembly are connected through a plurality of transmission shafts. When the input shaft rotates forwards, the first transmission assembly outputs power, and when the input shaft rotates reversely, the second transmission assembly outputs power. One motor can respectively drive two mechanisms to move, and the two mechanisms are mutually independent without any interference, so that the space is saved, and the device is convenient to use in a narrow space.

Description

TECHNICAL FIELD

[0001] The utility model belongs to mechanical drive technical field, especially a small coaxial double drive mechanism. BACKGROUND

[0002] With the development of science and technology, many devices begin to miniaturization, miniaturization, and the design requirement of device space is higher and higher, and with the replication of device, the required function is more and more, and in order to realize more functions, different driving is needed, thus forming this situation, such as the field of robots, the device is more and more low, the space is less and less, but the driving structure is more and more loaded, and the overall space is limited to find another way.

[0003] At present, the driving device generally uses motor, but a motor can only drive a group of mechanism movement, and another group of mechanism needs another group of motor, so when a group of mechanism stops, the motor also stops, but still occupies the device space, so the motor cannot be switched freely between the two groups of mechanism, and the utilization rate of motor is low. SUMMARY

[0004] To solve the above technical problems, the utility model adopts one technical scheme:

[0005] A small coaxial double drive mechanism, comprising a shell and a bidirectional transmission structure arranged in the shell;

[0006] The bidirectional transmission structure comprises a first transmission assembly and a second transmission assembly, and further comprises an input shaft and an output shaft, the input shaft is connected with the second transmission assembly, the output shaft is connected with the first transmission assembly, and the first transmission assembly and the second transmission assembly are connected through a plurality of transmission shafts;

[0007] When the input shaft rotates forward, the first transmission assembly outputs power, and when the input shaft rotates reversely, the second transmission assembly outputs power.

[0008] Further, the first transmission assembly comprises a first rotating body and a first one-way bearing, the first one-way bearing is sleeved on the outside of the first rotating body, the outer ring of the first one-way bearing is arranged in the shell, and the first rotating body is one-way rotated with the shell through the first one-way bearing;

[0009] The second transmission assembly comprises a planetary gear set, a second one-way bearing and a second rotating body, the second rotating body is sleeved on the outside of the second one-way bearing, the inner ring of the second one-way bearing is sleeved on the shell, the second rotating body is provided with a recess for accommodating the planetary gear set, the inside of the recess is provided with teeth for meshing with the planetary gear set, and the second rotating body is one-way rotated with the shell through the second one-way bearing;

[0010] A plurality of transmission shafts are respectively connected with the axis of each planet wheel in the planetary gear set at one end, and fixedly connected with the first rotating body at the other end, wherein a group of transmission shafts penetrates through the first rotating body and is sleeved with a gear.

[0011] Further, the input shaft is fixedly connected with the sun gear of the planetary gear set.

[0012] Further, the output shaft is fixedly connected with the first rotating body.

[0013] The utility model discloses the beneficial effects of:

[0014] The utility model discloses a group of motors can drive two groups of mechanism movement respectively, when the input shaft is forward rotation, the first transmission subassembly output power, when the input shaft reverse rotation, the second transmission subassembly output power, and two groups of power can be connected different mechanism respectively, drive different equipment, only need to control motor forward rotation and reverse rotation can switch quickly, and two groups of mechanism are independent of each other without any interference, save the space, be convenient for narrow space use. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, the following will be briefly introduced the drawing needed to be used in the embodiment or prior art description, obviously, the drawing in the following description only some embodiments of the utility model, for those skilled in the art, under the premise of not paying creative labor, still can obtain other drawings according to these drawings.

[0016] Figure 1 It is the whole structure schematic diagram of the utility model;

[0017] Figure 2 It is the cut structure schematic diagram of the utility model;

[0018] Figure 3 It is the exploded structure schematic diagram of the utility model;

[0019] Mark explanation:

[0020] 1, shell;2, bidirectional transmission structure;21, first transmission subassembly;211, first rotating body;212, first one-way bearing;22, second transmission subassembly;221, planetary gear set;222, second one-way bearing;223, second rotating body;223-1, recess;23, input shaft;24, output shaft;25, transmission shaft;251, gear;252, output gear. DETAILED DESCRIPTION

[0021] The advantages and features of the present application can be more easily understood by those skilled in the art, and the protection scope of the present application can be more clearly defined, by the preferred embodiments of the present application in combination with the accompanying drawings. Specific embodiment 1:

[0023] A small coaxial double transmission mechanism, comprising a shell 1 and a bidirectional transmission structure 2 arranged in the shell 1;

[0024] The bidirectional transmission structure 2 comprises a first transmission assembly 21 and a second transmission assembly 22, further comprising an input shaft 23 and an output shaft 24, the input shaft 23 is connected with the second transmission assembly 22, the output shaft 24 is connected with the first transmission assembly 21, and the first transmission assembly 21 and the second transmission assembly 22 are connected through a plurality of transmission shafts 25; the first transmission assembly 21 comprises a first rotating body 211 and a first one-way bearing 212, the first one-way bearing 212 is sleeved on the outside of the first rotating body 211, the outer ring of the first one-way bearing 212 is arranged in the shell 1, and the first rotating body 211 is one-way rotating with the shell 1 through the first one-way bearing 212; the second transmission assembly 22 comprises a planetary gear set 221, a second one-way bearing 222 and a second rotating body 223, the second rotating body 223 is sleeved on the outside of the second one-way bearing 222, the inner ring of the second one-way bearing 222 is sleeved on the shell 1, the second rotating body 223 is provided with a groove 223-1 accommodating the planetary gear set 221, the inside of the groove 223-1 is provided with teeth engaging with the planetary gear set 221, and the second rotating body 223 is one-way rotating with the shell 1 through the second one-way bearing 222;

[0025] When the input shaft 23 rotates forward, the first transmission assembly 21 outputs power, and when the input shaft reverses, the second transmission assembly 22 outputs power.

[0026] One end of each of the plurality of transmission shafts 25 is rotatably connected with the axis of each planetary gear in the planetary gear set 221, and the other end is fixedly connected with the first rotating body 211, and one group of transmission shafts 25 penetrates the first rotating body 211 and is sleeved with a gear 251.

[0027] Specifically, the input shaft 23 is fixedly connected with the sun gear of the planetary gear set 221, and the output shaft 24 is fixedly connected with the first rotating body 211.

[0028] Operating principle:

[0029] When the input shaft 23 rotates forward, the input shaft is fixedly connected to the sun gear, so as to drive the sun gear to rotate forward, the sun gear drives the second rotating body 223 to rotate reversely through the planetary gear, but the second one-way bearing 222 only allows forward rotation, so the second rotating body 223 cannot rotate, at this time the planetary gear rotates in the groove 223-1, the planetary gear transmits the rotating force to the first rotating body 211 through the transmission shaft, and the first rotating bearing 212 allows forward rotation, the first rotating body 211 is fixedly connected to the output shaft 24, so the output shaft 24 rotates at this time, which is the first transmission output.

[0030] When the input shaft 23 reverses, the planetary gear cannot reverse because the first rotating bearing 212 does not allow reverse rotation, the planetary gear drives the second rotating body 223 to rotate forward in place, at this time the second one-way bearing 222 allows forward rotation, so the planetary gear can continue to rotate in place, and an axis of the planetary gear penetrates the first rotating body 211 and is fixedly connected to the gear 251, the gear 251 rotates synchronously, the output shaft 24 is sleeved with the output gear 252 engaged with the gear 251, the output gear 252 is rotationally connected to the output shaft 24, and the output gear is the first transmission output.

[0031] The above is only an embodiment of the application, and does not limit the patent range of the application, any equivalent structural transformation or direct or indirect application in other related technical fields based on the content of the application and the drawings is also included in the patent protection range of the application.

Claims

1. A compact coaxial dual transmission mechanism characterized by: The utility model relates to a two-way transmission structure (2) and a shell (1) are provided with the two-way transmission structure (2) in the shell (1). The two-way transmission structure (2) comprises a first transmission assembly (21) and a second transmission assembly (22), and further comprises an input shaft (23) and an output shaft (24), the input shaft (23) is connected with the second transmission assembly (22), the output shaft (24) is connected with the first transmission assembly (21), and the first transmission assembly (21) and the second transmission assembly (22) are connected through a plurality of transmission shafts (25). When the input shaft (23) rotates forward, the first transmission assembly (21) outputs power, and when the input shaft reversely rotates, the second transmission assembly (22) outputs power.

2. A compact coaxial dual transmission mechanism according to claim 1, characterized in that: The first transmission assembly (21) comprises a first rotating body (211) and a first one-way bearing (212), the first one-way bearing (212) is sleeved on the outside of the first rotating body (211), the outer ring of the first one-way bearing (212) is arranged in the shell (1), and the first rotating body (211) is single-rotated with the shell (1) through the first one-way bearing (212). The second transmission assembly (22) comprises a planetary gear set (221), a second one-way bearing (222) and a second rotating body (223), the second rotating body (223) is sleeved on the outside of the second one-way bearing (222), the inner ring of the second one-way bearing (222) is sleeved on the shell (1), the second rotating body (223) is provided with a groove (223-1) for accommodating the planetary gear set (221), the inside of the groove (223-1) is provided with teeth for meshing with the planetary gear set (221), and the second rotating body (223) is single-rotated with the shell (1) through the second one-way bearing (222). One end of each of the plurality of transmission shafts (25) is rotatably connected with the axis of each planetary gear in the planetary gear set (221), and the other end is fixedly connected with the first rotating body (211), wherein one group of transmission shafts (25) penetrates the first rotating body (211) and is sleeved with a gear (251).

3. A compact coaxial dual transmission mechanism according to claim 2, characterized in that: The input shaft (23) is fixedly connected with the sun gear of the planetary gear set (221).

4. A compact coaxial dual transmission mechanism according to claim 1, characterized in that: The output shaft (24) is fixedly connected with the first rotating body (211).

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