CN200979469Y - A bidirectional torque testing device - Google Patents

Abstract

A two-way torque testing device, comprising a motor output shaft connected to a drive motor, the motor output shaft is connected to a transmission shaft, an electromagnetic brake is provided on the transmission shaft, a fixing plate of the electromagnetic brake is installed on a machine base, and the electromagnetic brake The moving part is connected to the transmission shaft, and the friction plate of the electromagnetic brake is located between the fixed plate and the braking part of the electromagnetic brake; The matching crank, the power crankshaft is connected to the rotational torque sensor through a coupling, the rotational torque sensor is connected to the encoder shaft through another coupling, the encoder is installed on the encoder shaft, and the connection interface between the encoder shaft and the device under test connect. The utility model provides a bidirectional torque testing device with high measuring precision and capable of adjusting the rotating speed and torque of loading and driving according to the testing requirements.

Description

Two-way torque test device

(1) Technical field

The utility model relates to a torque testing device.

(2) Background technology

For occasions that require torque testing, a torque transmission device is required, including a mechanical interface connected to the device to be tested, and a power output shaft connected to the drive motor. For example, the Chinese patent No. is 200320110275.8, and the patent name is a utility model patent for a high-speed, high-torque transmission box for a co-rotating twin-screw extruder, which discloses a torque transmission box that is driven by a driving gear and a driven gear. For the existing torque testing device, there are defects: it cannot adapt to the occasion requiring high precision, cannot adjust the speed and torque of loading and driving, and cannot meet the wide range requirements of loading and driving for speed and torque.

(3) Contents of the invention

In order to overcome the low precision of the existing torque test device and the inability to adjust the speed and torque of loading and driving, the utility model provides a two-way torque test with high measurement accuracy and the ability to adjust the speed and torque of loading and driving according to the test requirements. device.

The technical scheme that the utility model solves its technical problem adopts is:

A bidirectional torque testing device, comprising a motor output shaft connected to a drive motor, the motor output shaft is connected to a small clutch shaft through a first coupling, a first electromagnetic clutch is installed on the small clutch shaft, and the The armature of the first electromagnetic clutch is fixedly connected with the small clutch shaft, the armature of the first electromagnetic clutch is fixedly connected with the small load active synchronous pulley, the connecting sleeve of the first electromagnetic clutch is connected with the small clutch shaft through a bearing, and the first electromagnetic clutch is connected with the small clutch shaft through a bearing. The armature of the clutch is connected to the connecting sleeve through a spline, the small clutch shaft is connected to the input shaft of the reducer through the second coupling, and the output shaft of the reducer is fixedly connected to the large-load driving synchronous pulley. The small-load active synchronous pulley is connected with the small-load driven synchronous pulley through the first synchronous belt, and the large-load active synchronous pulley is connected with the large-load driven synchronous pulley through the second synchronous belt. The load driven synchronous pulley is fixedly connected to the transmission shaft, the second electromagnetic clutch is installed on the transmission shaft, the armature of the second electromagnetic clutch is fixedly connected with the transmission shaft, the armature of the second electromagnetic clutch is connected with the large The load-driven synchronous pulley is fixedly connected, the connecting sleeve of the second electromagnetic clutch is connected with the transmission shaft through a bearing, the armature of the second electromagnetic clutch is connected with the connecting sleeve through a spline, and the transmission shaft is provided with an electromagnetic brake. The fixed plate of the electromagnetic brake is installed on the machine base, the braking part of the electromagnetic brake is connected with the transmission shaft, and the friction plate of the electromagnetic brake is located between the fixed plate and the braking part of the electromagnetic brake; Pressing plate, the power crankshaft is provided with a crank matched with the push plate, the power crankshaft is connected to the rotational torque sensor through a coupling, and the rotational torque sensor is connected to the encoder shaft through another coupling, The encoder is installed on the encoder shaft, and the encoder shaft is connected with the connection interface of the device under test.

Further, the speed reducer is a planetary gear speed reducer.

Still further, the drive motor is an AC servo motor.

The beneficial effects of the utility model are mainly manifested in: 1. High measurement accuracy, and the speed and torque of loading and driving can be adjusted according to test requirements; 2. Satisfy the wide range requirements of loading and driving for speed and torque; The high-power motor meets the above two requirements; 4. Under the control of the computer, the AC servo motor can provide a wide range of constant resistance torque, constant speed, and constant drive torque required for testing.

(4) Description of drawings

Fig. 1 is a schematic structural diagram of a torque testing device.

(5) Specific implementation methods

Below in conjunction with accompanying drawing, the utility model is further described.

With reference to Fig. 1, a kind of two-way torque testing device comprises the motor output shaft 2 that is connected with drive motor 1, and described motor output shaft 2 is connected with small clutch shaft 18 through first coupling 17, and described small clutch shaft The first electromagnetic clutch 19 is installed on the 18, the armature 20 of the first electromagnetic clutch is fixedly connected with the small clutch shaft 18, the armature 21 of the first electromagnetic clutch is fixedly connected with the small load active synchronous pulley 22, the first electromagnetic clutch The connecting sleeve 23 of the clutch is connected with the small clutch shaft 20 through a bearing, the armature 21 of the first electromagnetic clutch is connected with the connecting sleeve 23 through a spline, and the armature 21 of the first electromagnetic clutch can move axially along the small clutch shaft under the action of electromagnetic force , the small clutch shaft 18 is connected with the input shaft 25 of the reducer through the second coupling 24, the output shaft 27 of the reducer 26 is fixedly connected with the large-load driving synchronous pulley 28, and the small-load The active synchronous pulley 22 is connected with the small load driven synchronous pulley 30 through the first synchronous belt 29, and the described large load active synchronous pulley 28 is connected with the large load driven synchronous pulley 32 through the second synchronous belt 31, so The small load driven synchronous pulley 30 is fixedly connected to the transmission shaft 3, the second electromagnetic clutch 33 is installed on the transmission shaft 3, and the armature 34 of the second electromagnetic clutch is fixedly connected with the transmission shaft 3, so The armature 35 of the second electromagnetic clutch is fixedly connected with the large-load driven synchronous pulley 32, the connecting sleeve 36 of the second electromagnetic clutch is connected with the transmission shaft 3 through the bearing, and the armature 35 of the second electromagnetic clutch is connected with the connecting sleeve 36 through the spline connected, the armature 35 of the second electromagnetic clutch can move axially along the drive shaft 3 under the action of electromagnetic force.

The transmission shaft 3 is provided with an electromagnetic brake 4, the fixed plate 5 of the electromagnetic brake is installed on the support 6, the braking part 7 of the electromagnetic brake is connected with the transmission shaft 3, and the friction plate 8 of the electromagnetic brake is located on the Between the fixed plate 5 and the brake part 7 of the electromagnetic brake; a pushing plate 9 is installed on the transmission shaft 3, and a crank 11 cooperating with the pushing plate 9 is provided on the described power crankshaft 10, and the described power crankshaft 10 The third shaft coupling 12 is connected with the rotational torque sensor 13, and the rotational torque sensor 13 is connected with the encoder shaft 15 through the fourth shaft coupling 14, and the described encoder 16 is installed on the encoder shaft 15, so The encoder shaft 15 described above is connected to the connection interface of the device under test.

The speed reducer 26 described in the motor output shaft 2 is a planetary gear speed reducer. The drive motor 1 is an AC servo motor.

The reason for using two electromagnetic clutches is: mode of work 1 (not using speed reducer): the use status of the clutch group is: the second electromagnetic clutch 33 loses power (failure), the first electromagnetic clutch 19 powers up (valid), and the motor (not Use reducer) → small load active synchronous pulley → first synchronous belt → small load driven synchronous pulley → transmission shaft → push plate → power crankshaft → rotational torque sensor → encoder → connection interface of the device under test. Working mode 2 (using a reducer): the state of the clutch group is: the second electromagnetic clutch 33 is powered on (effective), and the first electromagnetic clutch 19 is powered off (ineffective). Motor→small clutch shaft→reducer→first large load synchronous pulley→second synchronous belt→second large load synchronous pulley→second electromagnetic clutch→transmission shaft→push plate→power crankshaft→rotation torque sensor→encoder → The connection interface of the device under test.

The drive motor is an AC servo motor, which can be a drive motor or a load; it can realize bidirectional torque transmission.

Without the use of a reducer, the torque applied to the connection interface of the device under test is small and the speed is high. Using a reducer, it is high torque and low speed applied to the connection interface of the device under test. When the torque range required by the test conditions is 1Nm to 200Nm, and the speed range is 1rpm to 3500rpm, if the reducer is not used to meet such a large range of torque, a tens of kilowatts motor must be used. Using a reducer, a smaller power motor can be used. However, in order to suppress the time gap between forward and reverse, the reducer is structurally equipped with a device that preloads a few Nm of torque. According to the test, the loading requirement of 1Nm cannot be met, so the clutch group switching reducer is used to meet the wide range requirements of loading and driving for speed and torque.

The torque testing device of this embodiment has 6 working states:

(1) Torque loading state: the AC servo motor works in the torque control mode, and the direction of preparation movement is opposite to the rotation direction of the connecting shaft of the device under test. That is, the motor is in regenerative braking mode. The motor maintains the specified output torque to follow the rotation of the connecting shaft of the device under test. The connecting shaft of the device under test drives the universal joint, dynamic torque sensor, transmission shaft (electromagnetic brake energized), planetary reducer, and AC servo motor in sequence. It can measure the output torque, speed and rotation angle of the connecting shaft of the device under test under the specified load, and calculate the output power of the shaft.

The first electromagnetic clutch loses power, the first small load synchronous pulley fails, and the second electromagnetic clutch supplies power. The transmission process is: connecting shaft of the device under test→encoder shaft→coupling→rotation torque sensor→coupling→power crankshaft→push plate→transmission shaft→second electromagnetic clutch→heavy load driven synchronous pulley→second Two synchronous belt → large load active synchronous pulley → reducer → coupling → small clutch shaft → coupling → AC servo motor.

(2) Small torque loading state: the AC servo motor works in the torque control mode, and the direction of preparation movement is opposite to the rotation direction of the connecting shaft of the device under test. That is, the motor is in regenerative braking mode. The motor maintains the specified output torque to follow the rotation of the connecting shaft of the device under test. The shaft rotates the universal joint, the dynamic torque sensor, the transmission shaft, and the AC servo motor (without passing through the planetary reducer to achieve small torque loading) in turn. It can measure the output torque, speed and rotation angle of the connecting shaft of the device under test under the specified load, and calculate the output power of the shaft.

The second electromagnetic clutch loses power, the second largest load synchronous pulley fails, and the first electromagnetic clutch supplies power. The transmission process is: connecting shaft of the device under test→encoder shaft→coupling→rotational torque sensor→coupling→power crankshaft→push plate→transmission shaft→small load driven synchronous pulley→second synchronous belt→small Load active synchronous pulley → first electromagnetic clutch → small clutch shaft → coupling → AC servo motor.

(3) Torque drive state: AC servo motor works in the position control mode, at the specified speed (lower than the specified protection torque) according to the predetermined direction, and rotates the angle set by the software. The AC servo motor rotates the transmission shaft and the dynamic torque sensor after passing through the planetary gear reducer, and rotates the connecting shaft of the device under test after passing through the interface. The torque, rotational speed and rotation angle input to the connecting shaft of the device under test can be measured, and the input power of the connecting shaft of the device under test can be calculated.

The first electromagnetic clutch loses power, the first small load synchronous pulley fails, and the second electromagnetic clutch supplies power. The transmission process is: AC servo motor → coupling → small clutch shaft → coupling → reducer → large load active synchronous pulley → large synchronous belt → heavy load driven synchronous pulley → second electromagnetic clutch → transmission shaft → Push plate→power crankshaft→coupling→rotation torque sensor→coupling→encoder shaft→connection interface of the device under test.

(4) Small torque driving state: AC servo motor works in the position control mode, at the specified speed (lower than the specified protection torque) according to the predetermined direction, and rotates the angle set by the software. The AC servo motor drives the small clutch shaft through the coupling, and then drives the small load synchronous pulley through the first electromagnetic clutch. The small synchronous pulley directly drives the transmission shaft through the synchronous belt (without passing through the planetary gear reducer), and the transmission shaft passes through the push The pressure plate drives the power crankshaft, and the power crankshaft drives the torque sensor through the third coupling, and drives the connecting shaft of the device under test after passing through the interface. The torque, rotational speed and rotation angle input to the shaft can be measured, and the input power of the shaft can be calculated.

The second electromagnetic clutch loses power, the second largest load synchronous pulley fails, and the first electromagnetic clutch supplies power. The transmission process is: AC servo motor → coupling → small clutch shaft → first electromagnetic clutch → small load active synchronous pulley → small synchronous belt → small load driven synchronous pulley → transmission shaft → push plate → power crankshaft → coupling Shaft device→rotation torque sensor→coupling→encoder shaft→connection interface of the device under test.

(5) Braking state: The electromagnetic brake is de-energized, causing the transmission shaft to brake, forcing the connecting shaft of the device under test to brake, and staying at the desired position and angle.

(6) No-load state: The AC servo motor works in the position control mode, at a specified higher speed (lower than the specified protection torque) according to the predetermined direction, and rotates the angle set by the software. Make the push plate away from the power crankshaft. The corresponding connecting shaft of the device under test rotates under the action of the test piece, and drives the coupling→rotary encoder→dynamic torque sensor. Among them, the moment of inertia of the rotary encoder and the dynamic torque sensor is very small, which can be considered as no-load.

The transmission process is: connecting shaft of the device under test → encoder shaft → coupling → rotational torque sensor → coupling → power crankshaft.

Claims (3)

1, a kind of two-way torque detector, comprise the motor output shaft that is connected with drive motor, it is characterized in that: described motor output shaft is connected with little clutch shaft by first shaft coupling, first electromagnetic clutch is installed on the described little clutch shaft, the armature of described first electromagnetic clutch is fixedlyed connected with little clutch shaft, the armature of described first electromagnetic clutch is fixedlyed connected with little load active synchronization belt wheel, the adapter sleeve of first electromagnetic clutch connects with little clutch shaft by bearing, the armature of first electromagnetic clutch is connected by spline with adapter sleeve, described little clutch shaft is connected with reducer input shaft by second shaft coupling, the output shaft of described speed reduction unit is fixedlyed connected with heavy load active synchronization belt wheel, described little load active synchronization belt wheel is with synchronously by first and is connected with the driven synchronous pulley of little load, described heavy load active synchronization belt wheel is with synchronously by second and is connected with the driven synchronous pulley of heavy load, the driven synchronous pulley of described little load is fixedly connected on transmission shaft, second electromagnetic clutch is installed on the described transmission shaft, the armature of described second electromagnetic clutch is fixedlyed connected with transmission shaft, the armature of described second electromagnetic clutch is fixedlyed connected with the driven synchronous pulley of heavy load, the adapter sleeve of second electromagnetic clutch is by bearing and propeller shaft couplings, the armature of second electromagnetic clutch is connected by spline with adapter sleeve, described transmission shaft is provided with electromagnetic brake, the fixed head of electromagnetic brake is installed on the support, the brake portion of described electromagnetic brake is connected with transmission shaft, and the friction disc of described electromagnetic brake is between the fixed head and brake portion of electromagnetic brake; On the described transmission shaft push plate is installed, described power crankshaft is provided with the crank that cooperates with push plate, described power crankshaft is connected with the turning moment sensor by shaft coupling, described turning moment sensor is connected with the scrambler axle by another shaft coupling, described scrambler is installed on the scrambler axle, and described scrambler axle is connected with the connecting interface of device to be measured.

2, double-speed and double-torque transmitting device as claimed in claim 2 is characterized in that: described speed reduction unit is a planetary reducer.

3, as the described double-speed and double-torque transmitting device of one of claim 1-3, it is characterized in that: described drive motor is an AC servo motor.

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