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Torque sensor

A technology of torque sensor and rotation transmission, applied in torque measurement, instrument, power measurement, etc., can solve the problems of noise, vibration, output shaft impact torque increase, etc.

Inactive Publication Date: 2012-11-28
NITTO SEIKO KO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the impact torque of the output shaft increases, causing various problems such as noise and vibration.

Method used

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Experimental program
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no. 1 approach

[0022] Below, according to Figure 1 to Figure 3 The first embodiment of the present invention will be described.

[0023] exist figure 1 and figure 2 In the figure, reference numeral 1 is a torque sensor, which has a deformation body (a crooked body) 2 formed with a Roberval-type cavity hole 2a. The deformable body 2 is housed in a case 3 constituted by an upper cover 3a and a lower cover 3b. The upper surface of the deformable body 2 is covered with the upper cover 3a, while the lower surface of the deformable body 2 is covered with the lower cover 3b. In addition, a fixed end 2b is integrally formed at one end of the deformable body 2, and is fixed to the lower cover 3b by screws S. As shown in FIG. Additionally, if figure 1 As shown, an insertion hole 2f through which a pin (not shown) can be inserted is perforated on the fixed end 2b, and an insertion hole (not shown) through which the pin can be inserted is also perforated on the upper cover 3a. Then, the deformab...

no. 2 approach

[0033] Below, according to Figure 4 to Figure 6 A second embodiment of the present invention will be described. Here, the torque sensor 21 of the second embodiment arranges the deformed body 2 of the torque sensor 1 of the first embodiment described above longitudinally, and the arrangement of various structural components is changed accordingly.

[0034] Such as Figure 4 and Figure 5 As shown, the above-mentioned torque sensor 21 has a deformation body 22 formed with a Roberval-type cavity hole 22a, and the deformation body 22 is arranged such that its longitudinal side extends in the same direction as an intermediate shaft 26 described in detail later. . In addition, a fixed end 22 b is integrally formed on the upper end of the deformable body 22 so as to be fixed to the casing 23 .

[0035] In addition, the torque sensor 21 has an input shaft 24 that rotates with the drive of a motor (not shown) as an example of a drive source and extends in the same direction as the...

no. 3 approach

[0043] Below, according to Figure 7 A third embodiment of the present invention will be described. Here, the torque sensor 41 of the third embodiment uses sprockets 45 , 47 , and 49 instead of the input gear 5 , intermediate gear 7 , and output gear 9 used in the torque sensor 1 of the first embodiment.

[0044] exist Figure 7 Among them, reference numeral 41 is a torque sensor, and a sprocket 45 is attached to the input shaft 44 so as to be integrally rotatable with the input shaft 44 . On the other hand, an output sprocket 49 is also attached to the output shaft 48 so as to be rotatable integrally therewith. A chain 50 is wound around these sprockets 45 and 49 , and is configured to transmit the rotational drive of the input shaft 44 to the output shaft 48 . Further, an intermediate sprocket 47 attached to the intermediate shaft 46 so as to be rotatable integrally with the intermediate shaft 46 is arranged on the outer ring side of the chain 50 , and meshes so as to gui...

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Abstract

A torque sensor capable of highly accurately detecting low torque. A torque sensor (1) is provided with an input shaft (4) rotating when driven by a drive source, an output shaft (8) rotating as the input shaft (4) is rotationally driven, a rotation transmitting means (7) capable of transmitting rotation and drive of the input shaft (4) to the output shaft (8), a deforming body (2) for rotationally supporting the rotation transmitting means (7) and deforming according to rotational resistance of the output shaft (8) which resistance acts on the deforming body (2) through the rotation transmitting means (7), and strain detecting means (16, 17, 18, 19) for detecting strain or deformation of the deforming body (2). When rotational resistance of the output shaft (8) acts on the rotation transmitting means (7), the deforming body (2) deforms. Detection of the deformation of the deforming body (2) by the strain detecting means (16, 17, 18, 19) allows detection of torque. In addition, because the toque sensor does not require a planetary gear mechanism, output torque is not amplified, so that rotational resistance is not increased. Accordingly, low torque can be detected.

Description

technical field [0001] The present invention relates to a torque sensor capable of detecting low torque with high precision. Background technique [0002] Conventionally, there is a torque sensor disclosed in Patent Document 1 as a torque sensor configured such that a deformable body is strained by rotational resistance acting on a gear. The torque sensor is configured to have a planetary gear mechanism interposed between the input shaft and the output shaft, and the planetary gear mechanism transmits the rotational drive of the input shaft rotated by the driving of the motor to the output shaft. This planetary gear mechanism includes: a sun gear mounted on the above-mentioned input shaft; a plurality of planetary gears meshing with the sun gear and revolving around it, and rotating on its own; teeth, and the planetary gear is guided by the inner ring side by meshing with the planetary gear. In addition, the planetary gears are pivotally supported by a bracket, and the abo...

Claims

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Application Information

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IPC IPC(8): G01L3/14
CPCG01L3/1464G01L3/14
Inventor 杉浦弘忠石原雅和
Owner NITTO SEIKO KO