PTO2 power take-off torque transducer
Power take-off torque and speed transducer, ± 2 500 or ± 5 000 N·m, with integrated telemetry, an induction-powered stator and removable splined ends for spline types 1, 2 and 3.
Power take-off torque and speed transducer, ± 2 500 or ± 5 000 N·m, with an integrated B4-2W/E60 slip ring and a 60 ppr encoder, made for one PTO spline size.
- ± 2 500 · ± 5 000 N·m
- Torque ranges
- Telemetry
- Integrated, induction powered
- 3 kHz · 1 kHz
- Sampling · bandwidth
- 60 ppr
- Speed encoder
- ± 2 500 · ± 5 000 N·m
- Torque ranges
- Slip ring
- Integrated B4-2W/E60
- 350 Ω
- Full strain gage bridge
- 60 ppr
- Speed encoder
- Non-linearity≤ 0.5 % FS
- Hysteresis≤ 0.5 % FS
- Speed signal60 ppr Hall effect
- Operating temperature−40 to 105 °C (transducer)
- Non-linearity≤ 0.5 % FS
- Hysteresis≤ 0.5 % FS
- Speed signal60 ppr Hall effect
- Operating temperature−40 to 105 °C
Torque and speed by telemetry, with removable splined ends
The PTO measures the torque and the speed of a power take-off shaft. Its female spline mates with the PTO shaft of the machine, its male spline with the implement, and both splines lock. The splined ends can be removed and changed: type 1 (1 3/8 in, 6 teeth), type 2 (1 3/8 in, 21 teeth) and type 3 (1 3/4 in, 20 teeth). The telemetry transmitter excites the strain gages, amplifies and digitizes the torque signal and transmits it by radio, at 3 kHz for a 1 kHz bandwidth. A 60 pulse per revolution tone wheel and a Hall effect sensor give the speed. A non-rotating aluminum stator, aligned on the transducer by a large sealed bearing, carries the primary induction coil, the receiving antenna and the Hall effect sensor. Full scale is ± 2 500 or ± 5 000 N·m, with non-linearity and hysteresis below 0.5 % of full scale. It weighs 5.8 kg with a 1 3/8 in spline.
The transducer goes on the PTO shaft and the implement on the transducer, with no modification to either. An anti-rotation eye-hook keeps the stator from turning. Induction power and the receiver take 11 to 15 V DC, 3.0 A max. The transducer operates from −40 to 105 °C and the receiver box from 10 to 77 °C. It is delivered pre-calibrated, and its weatherproof construction allows field and long-term testing.
It is used to measure the mechanical power that a tractor delivers to the implement during field work, as an input to tractor transmission development.
Torque and speed through a slip ring, one spline size per transducer
The PTO2 measures the torque and the speed of a power take-off shaft. It is a tubular strain gage transducer with the female PTO spline machined into it; a male splined shaft is bolted to it for the implement. Each PTO2 is made for one spline size: 1 3/8 in with 6 or 21 teeth, rated ± 2 500 N·m, or 1 3/4 in with 6 or 20 teeth, rated ± 5 000 N·m. The 350 Ω full strain gage bridge is read across the integrated B4-2W/E60 instrument slip ring. A 60-tooth tone wheel on the slip ring rotor and a Hall effect sensor on its stator give 60 pulses per revolution. Non-linearity and hysteresis are ± 0.5 % of full scale. It weighs 3.7 kg with a 1 3/8 in spline. The slip ring is also available non-weatherproof, and with or without the encoder.
Two spline locking blocks, held by eight M4 screws, lock the female spline onto the groove of the tractor PTO shaft; the implement drive shaft goes on the male splined shaft. Two spring-loaded restraint cables, routed in opposite directions to fixed parts of the tractor, hold the slip ring stator: a rigid restraint would damage the slip ring. The torque signal leaves through the connector on the slip ring stator, the speed signal through the connector of the Hall effect sensor. The bridge output, in mV/V, is zeroed with no torque on the shaft and converted to N·m with the sensitivity or the 100 kΩ shunt given in the calibration documents. The slip ring seals are non-contacting: they keep out weather and water spray, but the assembly is not sealed against submersion. It is delivered pre-calibrated. The Transducer Display Module adds signal conditioning, an analog output and a display.
It is used to measure the mechanical power that a tractor delivers to the implement during field work, as an input to tractor transmission development.
Specifications
| Torque capacity | 2 500 · 5 000 N·m |
|---|---|
| Non-linearity | ≤ 0.5 % FS |
| Hysteresis | ≤ 0.5 % FS |
| Axes | 1 |
| Sensing principle | Strain gage |
| Encoder resolution | 60 ppr (Hall effect) |
| Bandwidth | 1 kHz |
| Sample rate | 3 kHz |
| Signal transmission | Telemetry |
| Supply voltage | 11 to 15 V (induction power and receiver, 3.0 A max) |
| Power source | Induction |
| Spline | 1 3/8 in, 6 teeth · 1 3/8 in, 21 teeth · 1 3/4 in, 20 teeth (removable splined ends, types 1, 2 and 3) |
| Weight | 5.8 kg (with 1 3/8 in spline) |
| Operating temperature | −40 to 105 °C (transducer) |
| Protection | Weatherproof |
| Operating temperature, stationary electronics | 10 to 77 °C (receiver box) |
| Torque capacity | 2 500 · 5 000 N·m (1 3/8 in splines: 2 500 N·m; 1 3/4 in splines: 5 000 N·m) |
|---|---|
| Non-linearity | ≤ 0.5 % FS |
| Hysteresis | ≤ 0.5 % FS |
| Axes | 1 |
| Sensing principle | Strain gage |
| Encoder resolution | 60 ppr (Hall effect) |
| Signal transmission | Slip ring (B4-2W/E60) |
| Bridge resistance | 350 Ω (full strain gage bridge) |
| Spline | 1 3/8 in, 6 teeth · 1 3/8 in, 21 teeth · 1 3/4 in, 6 teeth · 1 3/4 in, 20 teeth (one size per transducer) |
| Dimensions | Ø 123.19 × 223.2 mm (with 1 3/8 in-6 spline) |
| Weight | 3.7 kg (with 1 3/8 in spline) |
| Protection | Weatherproof |
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Resources
Datasheets and manuals
Drawings
None for PTO2.
CAD models
None for PTO2.
Related applications
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