CN203083756U

CN203083756U - Planetary torque transducer

Info

Publication number: CN203083756U
Application number: CN 201320114001
Authority: CN
Inventors: 王海波
Original assignee: NINGBO NENGWEI MOTOR TECHNOLOGY Co Ltd
Current assignee: NINGBO NENGWEI MOTOR TECHNOLOGY Co Ltd
Priority date: 2013-03-13
Filing date: 2013-03-13
Publication date: 2013-07-24
Anticipated expiration: 2023-03-13

Abstract

The utility model provides a planetary torque transducer, which comprises a central shaft, a sun gear, a planetary gear set and a gear ring, wherein the sun gear is arranged on the central shaft; the planetary gear set is meshed with the sun gear; the gear ring is meshed with the planetary gear set; one of the planetary gear set and the gear ring is used as a power input part; the other of the planetary gear set and the gear ring is used as a power output part; and the sun gear is also provided with a limit mechanism which is used for limiting the sun gear to rotate a certain angle. The planetary torque transducer also comprises a torque signal mechanism, wherein the torque signal mechanism is matched with the sun gear. The planetary torque transducer provided by the utility model has the beneficial effects that the planetary torque transducer has the characteristics of being safe, reliable, convenient to operate, high in detection precision, compact in structure, stable in running and high in reliability, simplifying the structure of a product, and lowering the production cost.

Description

A kind of planet torque sensor

Technical field

The utility model relates to a kind of planet torque sensor.

Background technology

The electric assisted bicycle complex structure of the man-machine coordination system that existing electric assisted bicycle has relates to the sensor of many precisions and electric-control system and the cost height.Utility model patent as China Patent No. ZL201120112207.X, open day is on Dec 21st, 2011, a kind of one wheel of power assisted wheelchair is disclosed, form by axle, motor, driving governor, planetary reducer, battery case, power battery pack, battery equalizer, wheel hub, torque sensor, described motor and described planetary reducer are formed reducing motor, and described reducing motor is contained in the center of described wheel hub; Described axle is the output shaft of described reducing motor, and described axle is an inverted structure with described reducing motor; The vehicle frame of described axle and described power assisted wheelchair maintains static moving, and the shell of the described reducing motor of rotation is fixed on the housing of described wheel hub; The battery case that described driving governor, power battery pack, battery equalizer are housed is fixed in the described wheel hub, and rotates synchronously with described wheel hub; Described torque sensor is contained on the described hub outside surface.Said structure is installed in torque sensor and makes on the hub outside surface that its measuring accuracy is not very high.

The utility model content

Technical problem to be solved in the utility model is to overcome the deficiency of above-mentioned prior art, provides a kind of safe and reliable, easy to operate, accuracy of detection height, compact conformation, the planet torque sensor that operates steadily.

The main technical schemes that a kind of planet torque sensor that provides according to the utility model adopts is: comprise central shaft, be installed in the central gear on the described central shaft, planetary gear set that is meshed with described central gear and the gear ring that is meshed with described planetary gear set, parts in described planetary gear set and the described gear ring are as power input part, another parts are as power output part, described central gear also is provided with the position-limit mechanism that the described central gear of restriction turns an angle, also comprise torque signals mechanism, described torque signals mechanism matches with described central gear.

The planet torque sensor that the utility model provides also can have following attached technical characterictic:

Described position-limit mechanism comprises back-moving spring that a fork that is connected with described central gear, the described fork of drive reset and the locating part that limits described fork, and described fork is provided with a bar hole, and described locating part is arranged in described bar hole.

Described torque signals mechanism is connected with described fork.

The both sides of described bar hole are provided with the fine setting screw rod.

Described planetary gear set comprises rotatable tooth rest and is installed in planet wheel on the described tooth rest, and described tooth rest is connected with the external impetus input block, and described gear ring is connected with outside power output part.

Described planetary gear set comprises rotatable tooth rest and is installed in planet wheel on the described tooth rest, and described tooth rest is connected with the external impetus output block, and described gear ring is connected with outside power input part.

Described position-limit mechanism comprises the arc stopper slot that is arranged on the described central gear, is arranged in the locating part of described stopper slot and drives the back-moving spring that described central gear resets, and described torque signals mechanism is connected with described central gear.

The beneficial effect that the planet torque sensor that adopts the utility model to provide brings is: the utlity model has safe and reliable, easy to operate, the accuracy of detection height, compact conformation, operate steadily, the reliability height, simplified the structure of product, reduced the characteristics of production cost.

Description of drawings

Fig. 1 is a decomposition chart of the present utility model.

Fig. 2 is a three-dimensional structure diagram of the present utility model.

Fig. 3 is a front view of the present utility model.

Fig. 4 is a fundamental diagram of the present utility model.

Fig. 5 is the structural drawing of fork in the utility model.

Fig. 6 is the structural drawing of second kind of embodiment of the present utility model.

Fig. 7 is the structural drawing of the central gear among second kind of embodiment of the present utility model.

Embodiment

Below in conjunction with accompanying drawing the utility model is done further detailed description:

Extremely shown in Figure 5 as Fig. 1, the embodiment of a kind of planet torque sensor that provides according to the utility model, comprise central shaft 1, be installed in the central gear 2 on the described central shaft 1, planetary gear set 3 that is meshed with described central gear 2 and the gear ring 4 that is meshed with described planetary gear set 3, parts in described planetary gear set 3 and the described gear ring 4 are as power input part, another parts are as power output part, described central gear 2 also is provided with the position-limit mechanism 5 that the described central gear 2 of restriction turns an angle, also comprise torque signals mechanism 6, described torque signals mechanism 6 matches with described central gear 2, when described gear ring 4 as power input part, described planetary gear set 3 is during as output block, described gear ring 4 drives described central gear 2 by described planetary gear set 3 and rotates synchronously, described position-limit mechanism 5 limits the rotational angle of described central gear 2 within the specific limits, make central gear 2 turn an angle, convert by the rotational angle of torque signals mechanism 6 collection central gears 2 and to rotational angle, just can learn level of torque by planetary gear set 3 inputs; When described gear ring 4 as power output part, planetary gear set 3 during as power input part, principle is identical, here repeats no more.

Described planetary gear set, described central gear and described gear ring are rotating parts, one of them as power input part, one as power output part, another is as detection part, can change mutually between the three.

Referring to Fig. 1 and Fig. 5, the planet torque sensor that provides according to the utility model, described position-limit mechanism 5 comprises back-moving spring 52 that a fork 51 that is connected with described central gear 2, the described fork 51 of drive reset and the locating part 53 that limits described fork 51, described fork 51 is provided with a bar hole 54, and described locating part 53 is arranged in described bar hole 54.The utility model planet torque sensor outside has a housing 7, and described locating part 53 is installed on the fixture on the described housing 7, have safe and reliable, easy to operate, the accuracy of detection height, compact conformation, operate steadily, the reliability height

Referring to Fig. 4 and Fig. 5, the planet torque sensor that provides according to the utility model, described torque signals mechanism 6 is connected with described fork 51, the both sides of described bar hole 54 are provided with fine setting screw rod 55, and the length of regulating bar hole 54 by the fine setting screw rod 55 that is arranged on bar hole 54 both sides has realized that central gear 2 turns the adjusting of angles.

Referring to Fig. 2 and Fig. 3, the planet torque sensor that provides according to the utility model, described planetary gear set 3 comprises rotatable tooth rest 31 and is installed in planet wheel 32 on the described tooth rest 31, when planetary gear set 3 as power input part, gear ring 4 during as power output part, described tooth rest 31 is connected with the external impetus input block, and described gear ring 4 is connected with the power output part of outside; When planetary gear set 3 as power output part, gear ring 4 during as power input part, described tooth rest 31 is connected with the external impetus output block, described gear ring 4 is connected with outside power input part.

Referring to Fig. 6 and Fig. 7, the utility model also provides the planet torque sensor of another embodiment, described position-limit mechanism 5 comprises the arc stopper slot 56 that is arranged on the described central gear 2, is arranged in the locating part 53 of described stopper slot 56 and drives the back-moving spring 52 that described central gear 2 resets, and described torque signals mechanism 6 is connected with described central gear 2.The foregoing description is that position-limit mechanism 5 is arranged on the central gear 2, directly limit the rotational angle of central gear 2 by locating part 53, torque signals mechanism 6 gathers the rotational angle of central gear 2 and rotational angle is converted, just can learn level of torque by planetary gear set 3 inputs, simplify the structure of product, reduced production cost.

Is example as power input part, gear ring 4 as power output part with planetary gear set 3, and principle of work of the present utility model is:

Active torque passes to tooth rest 31 by outside input block, tooth rest 31 is distributed to central gear 2 and gear ring 4 by planet wheel 32 with the active force of the active torque of generation, the torque that power produced on acting on central gear 2 is during greater than the countertorque that elastic force produced of back-moving spring 52, central gear 2 just can be gone ahead of the rest clockwise rotation when the countertorque that elastic force produced of back-moving spring 52 equals the torque that power produced on the central gear 2 together with the fork 51 that is connected with it, meanwhile, torque signals mechanism 6 just can be instant the pivot angle information that collects fork 51, and gear ring 4 clockwise rotates continuously, active torque is bigger, countertorque is just bigger, pendulum angle is therefore and bigger, and the pendulum angle signal is therefore and stronger.In fork 51 did not touch the pivot angle scope of locating part 53, the power of pendulum angle signal was directly proportional with the size of active torque.

Claims

1. planet torque sensor, the gear ring that comprises central shaft, is installed in the central gear on the described central shaft, the planetary gear set that is meshed with described central gear and is meshed with described planetary gear set, it is characterized in that: parts in described planetary gear set and the described gear ring are as power input part, another parts are as power output part, described central gear also is provided with the position-limit mechanism that the described central gear of restriction turns an angle, also comprise torque signals mechanism, described torque signals mechanism matches with described central gear.

2. a kind of planet torque sensor as claimed in claim 1, it is characterized in that: described position-limit mechanism comprises back-moving spring that a fork that is connected with described central gear, the described fork of drive reset and the locating part that limits described fork, described fork is provided with a bar hole, and described locating part is arranged in described bar hole.

3. a kind of planet torque sensor as claimed in claim 2 is characterized in that: described torque signals mechanism is connected with described fork.

4. a kind of planet torque sensor as claimed in claim 2, it is characterized in that: the both sides of described bar hole are provided with the fine setting screw rod.

5. a kind of planet torque sensor as claimed in claim 1, it is characterized in that: described planetary gear set comprises rotatable tooth rest and is installed in planet wheel on the described tooth rest, described tooth rest is connected with the external impetus input block, and described gear ring is connected with the power output part of outside.

6. a kind of planet torque sensor as claimed in claim 1, it is characterized in that: described planetary gear set comprises rotatable tooth rest and is installed in planet wheel on the described tooth rest, described tooth rest is connected with the external impetus output block, and described gear ring is connected with the power input part of outside.

7. a kind of planet torque sensor as claimed in claim 1, it is characterized in that: described position-limit mechanism comprises the arc stopper slot that is arranged on the described central gear, is arranged in the locating part of described stopper slot and drives the back-moving spring that described central gear resets, and described torque signals mechanism is connected with described central gear.