A gear shift actuator

Abstract

The present invention discloses a shift actuator, comprising: a power assembly, the power assembly comprising a motor and a worm gear connected to the output shaft of the motor; a reduction assembly connected to the power assembly, the reduction assembly comprising a turbine, a plurality of planetary gears and a ring gear; an output assembly connected to the reduction assembly, the output assembly comprising a turntable, the planetary gears rotating to drive the turntable to rotate; an actuator assembly connected to the output assembly, the actuator assembly comprising a rotating rod, one end of the rotating rod being connected to the rotating shaft of the turntable; a pull rod, one end of the pull rod being rotatably connected to the end of the rotating rod away from the turntable. In the present application, the worm gear and planetary gear transmission method is used for deceleration, which greatly reduces the size of the actuator and is more stable and quieter than the traditional cable transmission structure.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile speed change, and in particular to a gear shift actuator. Background Art

[0002] Traditional automatic transmission shift control in automobiles typically utilizes a mechanical cable-and-flex shaft system, with the shift actuator integrated into the automatic transmission. The connection between the mechanical cable-and-flex shaft and the automatic transmission's control rocker arm may vary depending on the vehicle model, necessitating a redesign of the transmission structure based on vehicle layout requirements. The cable-and-flex shaft must pass through the vehicle's center console, floor, and front engine compartment, placing significant demands on the vehicle's overall layout. Furthermore, the cable-and-flex shaft system requires the cable to provide a certain shift force and travel to the automatic transmission's control rocker arm. This force and travel must be provided by the shifter through the cable-and-flex shaft, necessitating a relatively large shifter. Furthermore, the cable-and-flex shaft generates friction and shift backlash, which can affect shift feel. Furthermore, transmission vibration can be transmitted to the driver through the cable and shifter, impacting comfort. Summary of the Invention

[0003] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a shift actuator.

[0004] The technical solution adopted by the present invention to solve the technical problem is a shift actuator, comprising:

[0005] A power assembly, the power assembly comprising a motor and a worm connected to an output shaft of the motor;

[0006] a reduction assembly connected to the power assembly, comprising: a turbine, the turbine meshing with the worm shaft; a plurality of planetary gears arranged circumferentially of the turbine and meshing with the turbine; a ring gear disposed on the outer ring of the turbine and coaxially rotating with the turbine, the ring gear meshing with the planetary gears;

[0007] An output assembly connected to the reduction assembly, the output assembly comprising a turntable, the turntable being driven by the planetary gear;

[0008] An actuator component is connected to the output component, and the actuator component includes: a rotating rod, one end of which is connected to the rotating shaft of the turntable; and a pull rod, one end of which is rotatably connected to an end of the rotating rod away from the turntable.

[0009] Preferably, it further comprises an upper shell and a base detachably connected to the upper shell, and an accommodating space is formed between the upper shell and the base; the power assembly, the deceleration assembly, and the output assembly are all arranged in the accommodating space.

[0010] Preferably, the gear ring is provided with a plurality of fixing holes for fixing the gear ring on the base.

[0011] Preferably, the turbine includes a first gear and a second gear coaxially connected, and the outer ring of the first gear is provided with first gear teeth; the worm rod is provided with helical gear teeth, and the first gear teeth are meshed with the helical gear teeth.

[0012] Preferably, the outer ring of the second gear is provided with second gear teeth; the outer ring of each of the planetary gears is provided with third gear teeth, and the second gear teeth are meshed with the third gear teeth.

[0013] Preferably, fourth gear teeth are provided on the inner side of the gear ring, and the fourth gear teeth are engaged with the third gear teeth.

[0014] Preferably, an angle sensor is further provided for detecting the rotation angle of the turntable.

[0015] Preferably, the actuator assembly also includes an adapter sleeve, which is provided with a slot along its length direction, and the end of the pull rod away from the rotating rod extends into the slot from one end of the adapter sleeve, and the pull rod can slide along the length direction of the slot; the adapter sleeve is also provided with a locking piece for locking the pull rod from sliding relative to the adapter sleeve.

[0016] Preferably, the locking member is provided on the side wall of the adapter sleeve and connected to the slot, and a first sawtooth is provided on one end of the locking member facing the slot; a second sawtooth is provided on the outer periphery of the pull rod;

[0017] The locking member is pressed to engage or disengage the first saw tooth and the second saw tooth.

[0018] Preferably, a fixed end is provided at one end of the adapter sleeve away from the pull rod, and the fixed end is used for rotatably connecting with the shifter.

[0019] Compared with the prior art, the present invention has at least the following beneficial effects:

[0020] 1. The reduction assembly uses a worm gear and planetary gear transmission method to reduce speed, which greatly reduces the size of the actuator. Compared with the traditional cable transmission structure, it is more stable and quieter.

[0021] 2. The distance between the adapter sleeve and the rotating rod can be adjusted by sliding the pull rod to meet usage requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 An exploded view of the shift actuator in the embodiment;

[0023] Figure 2An exploded view of the deceleration assembly and the output assembly in the embodiment;

[0024] Figure 3 A cross-sectional view of a shift actuator in an embodiment;

[0025] Figure 4 This is a second cross-sectional view of the shift actuator in the embodiment;

[0026] In the picture:

[0027] 100, upper shell; 110, base;

[0028] 200, turbine; 201, first gear; 202, second gear; 210, planetary gear; 220, ring gear; 221, fixing hole; 230, turntable;

[0029] 300, motor; 310, worm gear;

[0030] 400, rotating rod; 410, pulling rod; 411, second serration; 420, adapter sleeve; 421, locking member; 421a, first serration; 422, fixed end; 423, slot. DETAILED DESCRIPTION

[0031] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0032] Please refer to Figures 1-4 The present invention discloses a gear shift actuator, comprising:

[0033] A power assembly, comprising a motor 300 and a worm gear 310 connected to an output shaft of the motor 300;

[0034] A reduction assembly connected to the power assembly includes: a turbine 200, meshing with the worm shaft 310; a plurality of planetary gears 210 arranged circumferentially of the turbine 200 and meshing with the turbine 200; a ring gear 220, coaxially rotating with the turbine 200 and disposed on the outer ring of the turbine 200, meshing with the planetary gears 210;

[0035] An output assembly connected to the reduction assembly, the output assembly including a rotary disk 230, the rotation of the planetary gear 210 drives the rotary disk 230 to rotate;

[0036] An actuator component is connected to the output component, and the actuator component includes: a rotating rod 400, one end of which is connected to the rotating shaft of the turntable 230; and a pull rod 410, one end of which is rotatably connected to the end of the rotating rod 400 away from the turntable 230.

[0037] Specifically, a transmission form of turbine 200 and worm gear 310 is adopted between the power component and the reduction component to transmit the power in the motor 300 to the reduction component, and then through the cooperation of the turbine 200, planetary gear 210 and ring gear 220 in the reduction component, the torque is amplified and the speed is reduced, and then reaches the execution component through the output component, and the execution component drives the shifter to realize gear change.

[0038] Among them, the reduction assembly uses a worm gear and planetary gear 210 transmission method to reduce speed, which greatly reduces the size of the actuator. Compared with the traditional cable transmission structure, it is more stable and has less noise.

[0039] Furthermore, an output assembly is provided, and the rotating rod 400 is connected to the turntable 230, so that the circumferential power of the motor 300 is converted into linear power for the back-and-forth movement of the structural end (i.e., the component connected to the shifter), thereby realizing the change of the direction of force.

[0040] Preferably, it further includes an upper shell 100 and a base 110 detachably connected to the upper shell 100 , and an accommodating space is formed between the upper shell 100 and the base 110 ; the power assembly, the deceleration assembly, and the output assembly are all arranged in the accommodating space.

[0041] Preferably, the gear ring 220 is provided with a plurality of fixing holes 221 for fixing the gear ring 220 on the base 110 .

[0042] Specifically, when the motor 300 rotates, the worm gear 310 drives the turbine 200 to rotate, and the turbine 200 drives the planetary gear 210 to rotate. Because the outer ring is provided with a ring gear 220 that is meshed with it and the ring gear 220 is fixed to the base 110, the planetary gear 210 has both self-rotation and revolution. The revolution of the planetary gear 210 drives the turntable 230 to rotate, and finally pulls the pull rod 410 to move.

[0043] Preferably, the turbine 200 includes a first gear 201 and a second gear 202 that are coaxially connected, and the outer ring of the first gear 201 is provided with first gear teeth; the worm rod 310 is provided with helical gear teeth, and the first gear teeth are meshed with the helical gear teeth.

[0044] Preferably, the outer ring of the second gear 202 is provided with second gear teeth; the outer ring of each of the planetary gears 210 is provided with third gear teeth, and the second gear teeth are meshed with the third gear teeth.

[0045] Preferably, fourth gear teeth are provided on the inner side of the gear ring 220 , and the fourth gear teeth are meshed with the third gear teeth.

[0046] Preferably, an angle sensor is further provided for detecting the rotation angle of the turntable 230 .

[0047] Specifically, an angle sensor is provided at the rotation axis of the turntable 230 to detect the rotation angle in real time, and the rotation angle of the motor 300 can be adaptively adjusted according to the length of each gear shifting stroke to make each gear shifting more accurate.

[0048] Preferably, the actuator assembly also includes an adapter sleeve 420, and the adapter sleeve 420 is provided with a slot 423 along its length direction. The end of the pull rod 410 away from the rotating rod 400 extends into the slot 423 from one end of the adapter sleeve 420, and the pull rod 410 can slide along the length direction of the slot 423; the adapter sleeve 420 is also provided with a locking member 421 for locking the pull rod 410 from sliding relative to the adapter sleeve 420.

[0049] Specifically, the rotating rod 400 rotates along with the rotation of the rotating disk 230 , and the rotating rod 400 drives the pull rod 410 to move. The pull rod 410 slides in the slot 423 or drives the adapter sleeve 420 to move.

[0050] Preferably, the locking member 421 is provided on the side wall of the adapter sleeve 420 and connected to the slot 423 , and a first sawtooth 421 a is provided on one end of the locking member 421 facing the slot 423 ; a second sawtooth 411 is provided on the outer periphery of the pull rod 410 ;

[0051] The locking member 421 is pressed to engage or disengage the first saw teeth 421 a with the second saw teeth 411 .

[0052] The advantage of such a configuration is that the distance between the adapter sleeve 420 and the rotating rod 400 can be adjusted by sliding the pull rod 410 to meet usage requirements.

[0053] When the locking member 421 is pressed, the first serration 421a engages with the second serration 411 to limit the sliding of the pull rod 410 in the slot 423; when the locking member 421 is popped up, the first serration 421a separates from the second serration 411, releasing the pull rod 410 from sliding in the slot 423.

[0054] Preferably, a fixed end 422 is provided at one end of the adapter sleeve 420 away from the pull rod 410 , and the fixed end 422 is used for rotatably connecting with the shifter.

[0055] The fixed end 422 is rotatably connected to the shifter so that the shifter can shift gears. The fixed end 422 and the shifter are clamped together, and a ball head rotation pair is formed between the fixed end 422 and the shifter.

[0056] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0057] In addition, in the present invention, descriptions such as "first," "second," and "one" are for descriptive purposes only and should not be understood to indicate or imply their relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0058] In the present invention, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0059] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is mutually 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 invention.

Claims

1. A gear shift actuator, characterized in that: include: A power assembly, the power assembly comprising a motor and a worm connected to an output shaft of the motor; a reduction assembly connected to the power assembly, comprising: a turbine, the turbine meshing with the worm shaft; a plurality of planetary gears arranged circumferentially of the turbine and meshing with the turbine; a ring gear disposed on the outer ring of the turbine and coaxially rotating with the turbine, the ring gear meshing with the planetary gears; An output assembly connected to the reduction assembly, the output assembly comprising a turntable, the turntable being driven by the planetary gear; an actuator assembly connected to the output assembly, the actuator assembly comprising: a rotating rod, one end of which is connected to the rotating shaft of the turntable; a pull rod, one end of which is rotatably connected to an end of the rotating rod away from the turntable; The actuator assembly also includes an adapter sleeve, which is provided with a slot along its length direction. The end of the pull rod away from the rotating rod extends into the slot from one end of the adapter sleeve, and the pull rod can slide along the length direction of the slot; the adapter sleeve is also provided with a locking piece for locking the pull rod from sliding relative to the adapter sleeve.

2. The shift actuator according to claim 1, characterized in that: It also includes an upper shell and a base detachably connected to the upper shell, and a receiving space is formed between the upper shell and the base; the power component, the reduction component, and the output component are all arranged in the receiving space.

3. The shift actuator according to claim 2, characterized in that: The gear ring is provided with a plurality of fixing holes for fixing the gear ring on the base.

4. The shift actuator according to claim 1, characterized in that: The turbine includes a first gear and a second gear that are coaxially connected, and the outer ring of the first gear is provided with first gear teeth; the worm shaft is provided with helical gear teeth, and the first gear teeth are meshed with the helical gear teeth.

5. The shift actuator according to claim 4, characterized in that: The outer ring of the second gear is provided with second gear teeth; the outer ring of each of the planetary gears is provided with third gear teeth, and the second gear teeth are meshed with the third gear teeth.

6. The shift actuator according to claim 5, characterized in that: A fourth gear tooth is provided on the inner side of the gear ring, and the fourth gear tooth is meshed with the third gear tooth.

7. The shift actuator according to claim 1, characterized in that: An angle sensor is also provided for detecting the rotation angle of the turntable.

8. The shift actuator according to claim 1, characterized in that: The locking member is provided on the side wall of the adapter sleeve and connected to the slot, and a first sawtooth is provided on one end of the locking member facing the slot; a second sawtooth is provided on the outer periphery of the pull rod; The locking member is pressed to engage or disengage the first saw tooth and the second saw tooth.

9. The shift actuator according to claim 1, characterized in that: A fixed end is provided at one end of the adapter sleeve away from the pull rod, and the fixed end is used for being rotatably connected to the shifter.

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