Single-motor double-output mechanism

Abstract

The invention discloses a single-motor dual-output mechanism which comprises a motor assembly, a dead axle gear train, a planetary gear train, an electromagnetic clutch assembly, a shell assembly and an output gear. The shell assembly is used for supporting the motor assembly, the fixed shaft gear train, the planetary gear train and the electromagnetic clutch assembly. The motor assembly is used for providing power output; the fixed shaft gear train is in transmission connection with the planetary gear train and used for being switched to limit rotation of the outer gear ring or limit rotation of the planet carrier. The output gear is in transmission connection with an output shaft of the planet carrier; the planetary gear train is used for driving the output gear to rotate when the rotation of the outer gear ring is limited, and driving the electromagnetic clutch assembly and the output gear to move axially along the output gear when the rotation of the planetary carrier is limited. The single motor is adopted, the differential attribute of the planetary gear is utilized, the electromagnetic clutch mechanism is matched to achieve the double-output action of axial stretching and rotating, and the double-output mechanism is compact in structure, light in weight and lower in cost.

Description

Technical Field

[0001] The present invention relates to the technical field of transmission devices, and in particular to a single-motor dual-output mechanism. Background Art

[0002] In some high-power transmission systems, because the engine has high power, is difficult to start, and difficult to accurately control, when the output needs to be precisely positioned, it is difficult to meet the positioning accuracy requirements by relying on engine drive. At this time, it is necessary to add an electric mechanism that can accurately position in the main transmission system.

[0003] When the main transmission system outputs high power, the electric mechanism does not participate in the transmission and is separated from the main transmission system; when the output of the main transmission system requires precise positioning, the high-power output of the main transmission system stops, and the electric mechanism drives the transmission system to achieve precise positioning.

[0004] Since the electric mechanism needs to be separated from the main transmission system when the main transmission system outputs high power, it is necessary to achieve transmission meshing before driving when the drive transmission system is precisely positioned. The meshing transmission between the electric mechanism and the main transmission system adopts the gear transmission method. Figure 1 (Sketch of the motor mechanism before it engages with the transmission system) and Figure 2 As shown in the diagram of the electric mechanism after it is engaged with the main transmission system, it performs three steps in the entire working cycle. First, the output shaft performs axial movement to achieve engagement with the gears of the main transmission system. Then, the output performs rotational movement to drive the main transmission system to a specific angle. Finally, the output performs reverse axial movement to achieve disengagement from the main transmission system.

[0005] Therefore, the electric mechanism is a dual-output mechanism that needs to realize axial extension and contraction linear motion and rotational motion.

[0006] The dual-output mechanism can be driven by a single motor or a dual motor. When the dual-motor drive is used, the entire mechanism, as a dual-input and dual-output structure, requires two independent drives and transmissions, namely, two motor drives, two motors, and two transmission systems. A single-motor dual-output mechanism can be achieved by using one motor drive, one motor, one transmission system, and one transfer mechanism. Therefore, a single-motor dual-output mechanism is urgently needed. Summary of the invention

[0007] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a single-motor dual-output mechanism, which adopts a single motor to utilize the differential properties of planetary gears and cooperates with an electromagnetic clutch mechanism to achieve dual-output actions of axial extension and rotation. It has a compact structure, light weight and lower cost.

[0008] The objective of the present invention is achieved through the following technical solutions: A single-motor dual-output mechanism, comprising a motor assembly, a fixed-axis gear train, a planetary gear train, an electromagnetic clutch assembly, a housing assembly and an output gear; The housing assembly is used to provide support for the motor assembly, the fixed-axis gear train, the planetary gear train, and the electromagnetic clutch assembly; The motor assembly is used to provide power output; The fixed-axis gear system is drivingly connected to the planetary gear system, and is used to transmit the power provided by the motor assembly to the planetary gear system, wherein the planetary gear system includes an outer ring gear, planetary gears, a sun gear and a planet carrier; The electromagnetic clutch assembly is in transmission connection with the planetary gear train, and is used to switch to restrict the rotation of the outer gear ring or restrict the rotation of the planet carrier; The output gear is drivingly connected to the output shaft of the planet carrier; The planetary gear system is used for driving the output gear to rotate when the rotation of the outer gear ring is restricted, and the planetary gear system drives the electromagnetic clutch assembly and the output gear to move axially along the axial movement of the output gear when the rotation of the planetary carrier is restricted.

[0009] Furthermore, the housing assembly is provided with an internal thread, the outer surface of the outer gear ring is provided with an external thread, and the outer gear ring is connected to the housing assembly via the external thread and the internal thread.

[0010] Further, the electromagnetic clutch assembly includes a coil, a bushing and a baffle, the baffle is fixedly arranged on the output shaft of the planetary carrier, the bushing is slidably arranged on the output shaft of the planetary carrier and is located between the outer gear ring and the baffle, the coil is arranged outside the bushing and the coil is slidably connected to the housing assembly, and the coil only performs linear motion along the axial direction of the output shaft of the planetary carrier; The bushing is provided with a mounting groove with an opening toward the baffle, and a spring is provided in the mounting groove. When the coil is not energized, the coil is transmission-connected with the outer gear ring, and when the coil is energized, the coil is separated from the outer gear ring and is attracted to the baffle.

[0011] Furthermore, the end surface of the outer gear ring is provided with a first limiting tooth, the end surface of the coil is provided with a second limiting tooth meshing with the first limiting tooth, and the outer gear ring is connected to the coil via the first limiting tooth and the second limiting tooth.

[0012] Furthermore, the coil includes an electromagnetic ring and a metal winding arranged in the electromagnetic ring, and the second limiting tooth is arranged on the end surface of the electromagnetic ring.

[0013] Furthermore, the metal winding is a copper winding.

[0014] Furthermore, a keyway is provided on the output shaft of the planet carrier, and the baffle is connected to the output shaft via the keyway.

[0015] Furthermore, the electromagnetic ring is slidably connected to the housing assembly via a sliding key.

[0016] Furthermore, a chamfer is provided on a side of the output gear away from the electromagnetic clutch assembly.

[0017] Furthermore, the external thread and the internal thread are both trapezoidal threads.

[0018] The beneficial effects of the present invention are: 1) The present invention adopts a single motor to utilize the differential properties of the planetary gears and cooperates with the electromagnetic clutch mechanism to realize the dual-output actions of axial extension and rotation. It has a compact structure, light weight and lower cost.

[0019] 2) The torque transmission (rotational action) and motion transmission (engagement and disengagement actions) of the present invention respectively adopt the end face teeth (first limit teeth and second limit teeth) and friction slipping to smoothly realize the functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the prior art before the electric mechanism and the transmission system are engaged; Figure 2 It is a schematic diagram of the prior art after the electric mechanism is engaged with the main transmission system; Figure 3 It is a schematic diagram of the overall structure of a single-motor dual-output mechanism in an embodiment of the present invention; Figure 4 is a schematic diagram of the structure of a planetary gear system; Figure 5 is a three-dimensional diagram of the outer gear ring; Figure 6 It is a structural schematic diagram of the electromagnetic clutch component; Figure 7 is a three-dimensional diagram of the output gear; Figure 8 It is a schematic diagram of the connection relationship between the planetary gear train and the electromagnetic clutch assembly; In the figure, 1. motor assembly; 2. fixed-axis gear train; 3. planetary gear train; 4. electromagnetic clutch assembly; 5. housing assembly; 6. output gear; 7. outer gear ring; 8. planetary gear; 9. sun gear; 10. planetary carrier; 11. internal thread; 12. external thread; 13. coil; 14. bushing; 15. baffle; 16. spring; 17. first limit tooth; 18. second limit tooth; 19. electromagnetic ring; 20. metal winding; 21. keyway; 22. sliding key. DETAILED DESCRIPTION

[0021] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0022] See also Figure 3-Figure 8 , the present invention provides a technical solution: Example: like Figure 3-Figure 8 As shown, a single-motor dual-output mechanism includes a motor assembly 1, a fixed-axis gear train 2, a planetary gear train 3, an electromagnetic clutch assembly 4, a housing assembly 5, and an output gear 6; wherein the motor assembly 1, the fixed-axis gear train 2, the planetary gear train 3, the electromagnetic clutch assembly 4, and the output gear 6 are sequentially arranged along the power transmission direction of the motor; The housing assembly 5 is used to provide support for the motor assembly 1, the fixed-axis gear train 2, the planetary gear train 3, and the electromagnetic clutch assembly 4; The motor assembly 1 is used to provide power output, and the motor assembly 1 includes an electrical control to control the action of the entire mechanism; The fixed-axis gear train 2 is in driving connection with the planetary gear train 3, and is used to transmit the power provided by the motor assembly 1 to the planetary gear train 3, and decelerate and increase the torque during the power transmission process; the planetary gear train 3 includes an outer ring gear 7, planetary gears 8, a sun gear 9 and a planet carrier 10; The electromagnetic clutch assembly 4 is in transmission connection with the planetary gear train 3, and is used to switch to restrict the rotation of the outer gear ring 7 or restrict the rotation of the planet carrier 10; The output gear 6 is drivingly connected to the output shaft of the planet carrier 10; wherein the output shaft end of the planet carrier 10 extends out from the housing assembly 5, the output shaft of the planet carrier 10 is slidably connected to the housing part, and the output gear 6 is arranged outside the housing.

[0023] The planetary gear train 3 is used to rotate the planet carrier 10 to drive the output gear 6 when the rotation of the outer gear ring 7 is restricted. When the rotation of the planet carrier 10 is restricted, the outer gear ring 7 rotates, and the planetary gear train 3 moves axially along the output gear 6 to drive the electromagnetic clutch assembly 4 and the output gear 6 to move axially. The planetary gear train 3 is used to reduce speed and increase torque in the transmission, and cooperates with the electromagnetic clutch assembly 4 to realize the switching of the overall structural movement.

[0024] like Figure 3 , Figure 4 and Figure 8As shown, the housing assembly 5 has an internal thread 11, and the outer surface of the outer gear ring 7 is provided with an external thread 12. The outer gear ring 7 is connected to the housing assembly 5 through the external thread 12 and the internal thread 11, and both the external thread 12 and the internal thread 11 are trapezoidal threads. When the rotation of the planet carrier 10 is restricted, the outer gear ring 7 rotates, and the outer gear ring 7 forms a sliding spiral pair with the internal thread 11 and the external thread 12 of the housing assembly 5, and the outer gear ring 7 makes a spiral slide relative to the housing assembly 5. The electromagnetic clutch assembly 4 includes a coil 13, a bushing 14 and a baffle 15, wherein the baffle 15 is fixedly arranged on the output shaft of the planet carrier 10, the bushing 14 is slidably arranged on the output shaft of the planet carrier 10 and is located between the outer gear ring 7 and the baffle 15, the coil 13 is arranged outside the bushing 14 and the coil 13 is slidably connected to the housing assembly, and the coil 13 only makes a linear motion along the axial direction of the output shaft of the planet carrier 10; like Figure 3 , Figure 6 and Figure 8 As shown, the bushing 14 is provided with a mounting groove with an opening toward the baffle 15, and a spring 16 is provided in the mounting groove (wherein both ends of the spring 16 are respectively fixed to the bushing 14 and the baffle 15), and when the coil 13 is not energized, the coil 13 is transmission-connected with the outer gear ring 7, and when the coil 13 is energized, the coil 13 is separated from the outer gear ring 7 and is attracted to the baffle 15. The baffle 15 is made of ferromagnetic material.

[0025] The end surface of the outer gear ring 7 is provided with a first limiting tooth 17 , and the end surface of the coil 13 is provided with a second limiting tooth 18 meshing with the first limiting tooth 17 . The outer gear ring 7 is connected to the coil 13 via the first limiting tooth 17 and the second limiting tooth 18 .

[0026] The coil 13 includes an electromagnetic ring 19 and a metal winding 20 disposed in the electromagnetic ring 19 , and the second limiting teeth 18 are disposed on the end surface of the electromagnetic ring 19 .

[0027] The metal winding 20 is a copper winding.

[0028] like Figure 6 As shown, a keyway 21 is provided on the output shaft of the planet carrier 10 , and the baffle 15 is connected to the output shaft via the keyway 21 , wherein the end of the baffle 15 is concave and extends into the keyway 21 , and is rotatably connected to the keyway 21 .

[0029] like Figure 8 As shown, the electromagnetic ring 19 is slidably connected to the housing assembly 5 through the sliding key 22, that is, the electromagnetic ring 19 only moves linearly along the output shaft axial direction of the planet carrier 10. Among them, the long sliding groove can be set on the electromagnetic ring 19, and the sliding key 22 is set on the housing assembly 5; the long sliding groove can also be set on the housing assembly 5, and the sliding key 22 is fixed on the electromagnetic ring 19.

[0030] The side of the teeth of the output gear 6 away from the electromagnetic clutch assembly 4 is chamfered.

[0031] Working principle: (1) When the single-motor dual-output mechanism (hereinafter referred to as the electric mechanism) is not working, the electromagnetic ring 19 of the electromagnetic clutch assembly 4 is locked together with the outer ring gear 7 of the planetary gear system 3 through the first limit tooth 17 and the second limit tooth 18 (the first limit tooth 17 is meshed with the second limit tooth 18, and the limit tooth structure is as shown in the figure, which can be but not limited to bar-shaped spur teeth) under the action of the spring 16, that is, the electromagnetic ring 19 is meshed with the outer ring gear 7. At this time, since the electromagnetic ring 19 has no rotational freedom, the rotational freedom of the outer ring gear 7 meshing with it is also locked, and the entire mechanism cannot achieve axial movement.

[0032] (2) When the electric mechanism starts working, the axial extension and contraction movement should be performed first to achieve the engagement between the electric mechanism and the transmission system.

[0033] At this time, the copper winding of the electromagnetic clutch assembly 4 is energized, and the copper winding after energization will generate electromagnetic force. Under the action of the electromagnetic force, the electromagnetic ring 19 will overcome the force of the spring 16 and combine with the baffle 15; at this time, the first limit tooth 17 and the second limit tooth 18 are separated, and the electromagnetic ring 19 is separated from the outer gear ring 7, and the rotational freedom of the outer gear ring 7 is opened, and it can make a spiral motion relative to the outer shell. At the same time, because the baffle 15 and the electromagnetic ring 19 are combined together by electromagnetic force, the rotational freedom of the baffle 15 is locked, and the rotational freedom of the planet carrier 10 of the planetary gear system 3 connected to the baffle 15 by a key is also locked.

[0034] In this state, the planetary gear 8 is equivalent to a fixed-axis gear train, and its output is the rotation of the outer ring gear 7. The rotation of the outer ring gear 7 will form a spiral sliding with the housing assembly 5, and then push the planetary gear 8 and the electromagnetic clutch assembly 4 to move axially along the output shaft of the planetary carrier 10, that is, the aforementioned axial telescopic movement, to achieve gear meshing between the electric mechanism and the main transmission system.

[0035] During the process of the gears of the electric mechanism and the main transmission system meshing with each other, there may be problems with the teeth not meshing well. A chamfer is designed on the output gear 6. When meshing is difficult, the output gear 6 will form a rotational torque under the action of the chamfer. This torque will increase under the action of the motor. When it is greater than the friction torque formed by the electromagnetic force between the electromagnetic ring 19 and the baffle 15, the baffle 15 will slip and rotate, and the output gear 6 installed on the planetary carrier 10 will also rotate, thus achieving smooth meshing of the gears. The design of friction slip and the chamfer of the output gear 6 can ensure the smooth meshing of the output gear 6 with the main transmission system. After the electric mechanism is smoothly meshed with the main transmission system, the copper winding of the electromagnetic clutch assembly 4 is de-energized, and the electromagnetic ring 19 is separated from the baffle 15 under the action of the spring 16 and meshes with the outer ring gear 7 of the planetary gear system 3. The electromagnetic ring 19 is connected to the outer ring gear 7 through the end teeth to ensure high torque transmission; the rotational freedom of the outer ring gear 7 is locked by the electromagnetic ring 19, and the planetary gear system 3 is a conventional mechanism for the rotation of the planet carrier 10; the motor rotates to drive the output gear 6 to rotate, thereby driving the main transmission system to rotate.

[0036] After the electric mechanism drives the main transmission system to a precise position and the main transmission mechanism autonomously brakes and locks, the electric mechanism needs to disconnect from the main transmission system. The disconnection method is the same as the engagement method, with the only difference being that the motor is reversed.

[0037] The single-motor dual-output mechanism utilizes the differential properties of planetary gears and cooperates with the electromagnetic clutch mechanism to achieve split and automatic control.

[0038] The above is only a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art shall not deviate from the spirit and scope of the present invention, and shall be within the scope of protection of the claims attached to the present invention.

Claims

1. A single motor dual output mechanism, characterized in that: It includes a motor assembly, a fixed-axis gear train, a planetary gear train, an electromagnetic clutch assembly, a housing assembly and an output gear; The housing assembly is used to provide support for the motor assembly, the fixed-axis gear train, the planetary gear train, and the electromagnetic clutch assembly; The motor assembly is used to provide power output; The fixed-axis gear system is drivingly connected to the planetary gear system, and is used to transmit the power provided by the motor assembly to the planetary gear system, wherein the planetary gear system includes an outer ring gear, planetary gears, a sun gear and a planet carrier; The electromagnetic clutch assembly is in transmission connection with the planetary gear train, and is used to switch to restrict the rotation of the outer gear ring or restrict the rotation of the planet carrier; The output gear is drivingly connected to the output shaft of the planet carrier; The planetary gear system is used for when the rotation of the outer gear ring is restricted, the planet carrier rotates to drive the output gear to rotate; when the rotation of the planet carrier is restricted, the outer gear ring rotates, and the planetary gear system moves axially along the output gear to drive the electromagnetic clutch assembly and the output gear to move axially.

2. According to claim 1, the single motor dual output mechanism is characterized in that: The housing assembly is provided with internal threads, and the outer surface of the outer gear ring is provided with external threads. The outer gear ring is connected to the housing assembly via the external threads and the internal threads.

3. The single motor dual output mechanism according to claim 2, characterized in that: The electromagnetic clutch assembly includes a coil, a bushing and a baffle, wherein the baffle is fixedly arranged on the output shaft of the planetary carrier, the bushing is slidably arranged on the output shaft of the planetary carrier and is located between the outer gear ring and the baffle, the coil is arranged outside the bushing and the coil is slidably connected to the housing assembly, and the coil only moves linearly along the axial direction of the output shaft of the planetary carrier; The bushing is provided with a mounting groove with an opening toward the baffle, and a spring is provided in the mounting groove. When the coil is not energized, the coil is transmission-connected with the outer gear ring, and when the coil is energized, the coil is separated from the outer gear ring and is attracted to the baffle.

4. The single motor dual output mechanism according to claim 3, characterized in that: The end surface of the outer gear ring is provided with a first limiting tooth, the end surface of the coil is provided with a second limiting tooth meshing with the first limiting tooth, and the outer gear ring is connected to the coil via the first limiting tooth and the second limiting tooth.

5. The single motor dual output mechanism according to claim 4, characterized in that: The coil comprises an electromagnetic ring and a metal winding arranged in the electromagnetic ring, and the second limiting tooth is arranged on the end surface of the electromagnetic ring.

6. The single-motor dual-output mechanism according to claim 5, characterized in that: The metal winding is a copper winding.

7. The single motor dual output mechanism according to claim 3, characterized in that: A keyway is provided on the output shaft of the planet carrier, and the baffle is connected to the output shaft via the keyway.

8. The single motor dual output mechanism according to claim 5, characterized in that: The electromagnetic ring is slidably connected to the housing assembly via a sliding key.

9. The single-motor dual-output mechanism according to any one of claims 1 to 8, characterized in that: A chamfer is provided on a side of the output gear away from the electromagnetic clutch assembly.

10. The single motor dual output mechanism according to claim 2, characterized in that: The external thread and the internal thread are both trapezoidal threads.

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