CN218277876U - Combine drive belt rate of tension automatic regulating apparatus - Google Patents
Combine drive belt rate of tension automatic regulating apparatus Download PDFInfo
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- CN218277876U CN218277876U CN202221323515.1U CN202221323515U CN218277876U CN 218277876 U CN218277876 U CN 218277876U CN 202221323515 U CN202221323515 U CN 202221323515U CN 218277876 U CN218277876 U CN 218277876U
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Abstract
The utility model provides a combine drive belt rate of tension automatic regulating apparatus, including setting up thermal infrared temperature sensor and the ultrasonic sensor in the drive sticky tape top, the drive sticky tape surface temperature that temperature sensor measured, the drive sticky tape that ultrasonic sensor measured beats from top to bottom, display control system is based on drive sticky tape surface temperature and/or beats from top to bottom, the output control volume drives the lead screw of servo electronic jar and makes concertina movement, and transmits to the take-up pulley, thereby drive the take-up pulley and make the up-and-down motion, finally realize the automatically regulated to drive sticky tape rate of tension. The utility model discloses a change the tensioning of drive belt or relax, effectively guarantee combine's operating quality.
Description
Technical Field
The utility model belongs to the technical field of agricultural machine, concretely relates to combine drive belt rate of tension automatic regulating apparatus.
Background
China is a big agricultural country, the number of agricultural equipment is very large, and the requirement on the operating efficiency of agricultural machinery is very high. The combine harvester, as one of the important components of agricultural equipment machinery, can be roughly divided into two types, namely a full-feeding type and a half-feeding type at present, and the two types of combine harvesters have different structures and working principles but have own advantages. However, as a conventional full-feeding combine harvester, during the working process, the problem that the belt temperature is too high and the belt is aged due to loosening and falling of the transmission belt and excessive tensioning in the belt transmission device often occurs, and because the related basic theory is not deeply researched, the intensive research on the transmission belt tensioning device is urgently needed to provide technical support for improving the working performance of the combine harvester.
SUMMERY OF THE UTILITY MODEL
Exist not enoughly among the prior art, the utility model provides a combine drive belt rate of tension automatic regulating apparatus improves combine working property and has the significance to solving drive belt work problem.
The utility model discloses a realize above-mentioned technical purpose through following technological means.
An automatic adjusting device for the tensity of a transmission belt of a combine harvester comprises a driving wheel and a driven wheel which are connected through a transmission rubber belt, wherein the transmission rubber belt is tensioned by a tensioning wheel, and a thermal infrared temperature sensor and an ultrasonic sensor are arranged above the transmission rubber belt; the tensioning wheel is connected with the lower end of the spring connecting rod through the tensioning spring, the upper end of the spring connecting rod is connected with a lead screw of the servo electric cylinder through a pair of fisheye bearings which are distributed in central symmetry, and the lead screw of the servo electric cylinder is connected with a pull rod of the displacement sensor.
According to the technical scheme, the pair of fisheye bearings are connected through the connecting shaft, and the thrust rings are respectively installed on the outer sides of the connecting shaft.
Above-mentioned technical scheme, the lead screw of servo electric cylinder passes through the connection piece with displacement sensor's pull rod and is connected.
According to the technical scheme, the driving wheel is provided with the Hall sensor, and the driven wheel is provided with the torque sensor.
According to the technical scheme, the signal lines of the temperature sensor, the ultrasonic sensor, the displacement sensor, the servo electric cylinder, the Hall sensor and the torque sensor are connected with the display control system.
The utility model has the advantages that: the utility model discloses well temperature sensor and ultrasonic sensor install in transmission sticky tape top, the transmission sticky tape that transmission sticky tape surface temperature and ultrasonic sensor measured through temperature sensor measure beats from top to bottom, display control system is based on transmission sticky tape surface temperature and/or beats from top to bottom, the output control volume drives the lead screw of servo electronic jar and makes concertina movement, and transmit to the take-up pulley, thereby drive the take-up pulley and make the up-and-down motion, finally realize the automatically regulated to transmission sticky tape rate of tension. The utility model discloses to combine belt overspeed device tensioner's research and development, improve the stability of drive belt work, guarantee combine operation quality and have important meaning.
Drawings
FIG. 1 is a schematic structural view of an automatic transmission belt tension adjusting device of a combine harvester according to the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1;
in the figure: 1-a frame; 2-driven wheel; 3-a transmission adhesive tape; 4-thermal infrared temperature sensors; 5-an ultrasonic sensor; 6-a first hexagonal nut; 7-a displacement sensor; 8-servo electric cylinder; 9-a second hexagonal nut; 10-connecting a sheet; 11-fisheye bearings; 12-a screw; 13-a thrust ring; 14-a connecting shaft; 15-spring connecting rod; 16-flat bond; 17-a drive shaft; 18-a hall sensor; 19-a driving wheel; 20-a tension wheel; 21-a tension spring; 22-torque sensor.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments, but the scope of the invention is not limited thereto.
As shown in fig. 1, the utility model relates to a combine drive belt rate of tension automatic regulating apparatus includes frame 1, follow driving wheel 2, driving tape 3, hot infrared temperature sensor 4, ultrasonic sensor 5, hexagon nut 6, displacement sensor 7, servo electronic jar 8, hexagon nut two 9, connection piece 10, flake bearing 11, screw 12, thrust collar 13, connecting axle 14, spring coupling pole 15, parallel key 16, transmission shaft 17, hall sensor 18, action wheel 19, take-up pulley 20, tensioning spring 21, torque sensor 22 and display control system.
The driving wheel 19 and the driven wheel 2 are both arranged on the frame 1, the driving wheel 19 is connected with the transmission shaft 17 through the flat key 16, the transmission shaft 17 is connected with an external power source, the driving wheel 19 obtains input power, the driving wheel 19 is connected with the driven wheel 2 through the transmission adhesive tape 3, the transmission adhesive tape 3 is tensioned by the tensioning wheel 20, and the tensioning wheel 20 is fixed on the frame 1; a thermal infrared temperature sensor 4 and an ultrasonic sensor 5 are arranged above the transmission rubber belt 3; the displacement sensor 7 and the servo electric cylinder 8 are both fixed on the rack 1, a pull rod of the displacement sensor 7 is connected with a lead screw of the servo electric cylinder 8 through a connecting sheet 10, the pull rod of the displacement sensor 7 is fixed with the connecting sheet 10 through two hexagon nuts I6, and the lead screw of the servo electric cylinder 8 is fixed with the connecting sheet 10 through a fisheye bearing 11 and a hexagon nut II 9; a fisheye bearing 11 is arranged close to the driving wheel 19, the two fisheye bearings 11 are distributed in a central symmetry manner, the two fisheye bearings 11 are connected through a connecting shaft 14, thrust rings 13 are respectively arranged on the connecting shaft 14 at the outer sides of the fisheye bearings 11 to prevent sliding, and the thrust rings 13 and the connecting shaft 14 are fixed through screws 12; the tensioning wheel 20 is provided with a tensioning spring 21 which plays a role in buffering and damping, the upper end of the tensioning spring 21 is connected with the lower end of the spring connecting rod 15, and the upper end of the spring connecting rod 15 is connected with the lower end of the fisheye bearing 11 close to the driving wheel 19 through threads; the Hall sensor 18 is arranged on the driving wheel 19, the Hall sensor 18 is used for detecting the rotating speed of the driving wheel 19, the torque sensor 22 is arranged on the driven wheel 2, and the torque sensor 22 is used for measuring the torque of the driven wheel 2; the signal lines of the temperature sensor 4, the ultrasonic sensor 5, the displacement sensor 7, the servo electric cylinder 8, the Hall sensor 18 and the torque sensor 22 are connected with a display control system.
The pull rod of the displacement sensor 7 moves within the range of 0-200mm, when the device is located at an initial position, the displacement sensor 7 displays that the pull rod is located at the position of 100mm displacement, and the screw rod of the servo electric cylinder 8 is adjusted within the range of 100mm up and down along the movement direction relative to the initial position. Tensioner 20 is adjusted in the tensioning direction within 100mm up and down relative to the initial position.
In the working process, the Hall sensor 18 is used for detecting the rotating speed of the driving wheel 19, the torque sensor 22 is used for measuring the torque of the driven wheel 2, the thermal infrared temperature sensor 4 is used for measuring the surface temperature value of the transmission rubber belt 3, the ultrasonic sensor 5 is used for detecting the up-and-down jumping change of the transmission rubber belt 3, signals collected by the sensors are transmitted to the display control system, the display control system outputs control quantity to drive the lead screw of the servo electric cylinder 8 to do telescopic motion after the control model operation based on the surface temperature value and the up-and-down jumping change of the transmission rubber belt 3 in the working process, the data collected by the displacement sensor 7 is used for displaying the lead screw motion displacement quantity of the servo electric cylinder 8, the telescopic motion of the lead screw of the servo electric cylinder 8 is transmitted to the tension wheel 20 through the fisheye bearing pair 11, the spring connecting rod 15 and the tension spring 21 in sequence, so as to drive the tension wheel 20 to do up-and-down motion, and finally realize the automatic adjustment of the tension degree of the transmission rubber belt 3.
(1) The operation process of the control model for adjusting the tensity by the surface temperature change of the transmission rubber belt 3 is as follows:
s1, carrying out a simulation loading test on a transmission adhesive tape 3 on a high-power fatigue test bed, taking the tension degree of the transmission adhesive tape 3 as a variable (changed by a tension wheel 20), acquiring a surface temperature T change rule of the transmission adhesive tape 3 in a steady-state operation process by a thermal infrared temperature sensor 4, and establishing a temperature change quantity delta T 1 And amount of change of tension DeltaD 1 The relationship model between them is shown in formula (1):
△D 1 ＝f(△T 1 ) (1)
s2, establishing the elongation L of the servo electric cylinder 8 screw rod 1 And tension degree D 1 The mathematical model between them is shown in formula (2):
D 1 ＝f(L 1 ) (2)
wherein the tension degree D 1 According to the variation quantity Delta D of the tension 1 Acquisition (prior art);
s3, establishing the elongation L of the servo electric cylinder 8 screw rod 1 Number of input pulses U of servo electric cylinder 8 1 Mathematical model of (1):
U 1 ＝L 1 *N 1 /h 1 (3)
wherein h is 1 For servo-pitch of 8-lead screw of electric cylinder, N 1 The number of pulses required for each distance of advancing or retracting one pitch of the servo electric cylinder 8;
s4, establishing the surface temperature and the tensity D of the transmission rubber belt 3 1 The system identification model in between, as follows:
T(t+1)＝α 1 T(t)+K 1 D 1 (4)
wherein T (T) is the current value of the surface temperature of the transmission adhesive tape 3 (the measured value of the thermal infrared temperature sensor 4), T (T + 1) is the predicted value of the surface temperature of the transmission adhesive tape 3 at the next moment, and alpha 1 Is a constant number, K 1 Model parameters (obtained by data fitting);
s5, calculating a predicted value of the surface temperature of the transmission adhesive tape 3 and a set value T0 of the surface temperature of the transmission adhesive tape 3 at the next moment 1 The difference between the two values is calculated as follows:
△T 1 ＝T(t+1)-T0 1 (5)
s6, according to the temperature difference delta T 1 The input pulse number U of the servo electric cylinder 8 is calculated and acted on the output adjustment of the display control system through the formula (1), the formula (2) and the formula (3) 1 The elongation of the screw rod of the servo electric cylinder 8 is adjusted, and then the tensioning or the loosening of the transmission rubber belt 3 is realized.
(2) The control model operation process for adjusting the tensity by the up-and-down jumping change of the transmission rubber belt 3 is as follows:
S1，carrying out a simulation loading test on the transmission rubber belt 3 on a high-power fatigue test bed, taking the tension degree of the transmission rubber belt 3 as a variable, acquiring an up-down jumping change rule of the transmission rubber belt 3 in a steady-state operation process by the ultrasonic sensor 5, and establishing a jumping change quantity delta E 1 And amount of change of tension DeltaD 2 The relationship between them is modeled as shown in equation (6):
△D 2 ＝f(△E 1 ) (6)
s2, establishing the elongation L of the servo electric cylinder 8 screw rod 2 And tension degree D 2 The mathematical model therebetween is shown in equation (7):
D 2 ＝f(L 2 ) (7)
wherein the tension degree D 2 According to the amount of change of tension Delta D 2 Acquisition (prior art);
s3, establishing the elongation L of the servo electric cylinder 8 screw rod 2 Number of input pulses U of servo electric cylinder 8 2 Mathematical model of (1):
U 2 ＝L 2 *N 2 /h 2 (8)
wherein h is 2 For servo-pitch of 8-lead screw of electric cylinder, N 2 The number of pulses required for each distance of advancing or retracting one pitch of the servo electric cylinder 8;
s4, establishing the vertical runout and the tension D of the transmission rubber belt 3 2 The system identification model in between, as follows:
E(t+1)＝α 2 E(t)+K 2 D 2 (9)
wherein T (T) is the current value of the vertical runout of the transmission rubber belt 3 (the measured value of the ultrasonic sensor 5), E (T + 1) is the predicted value of the vertical runout of the transmission rubber belt 3 at the next moment, and alpha 2 Is a constant, K 2 Is a model parameter;
s5, calculating the predicted value of the upper and lower jumping amount of the transmission adhesive tape 3 at the next moment and the set value E0 of the jumping amount of the transmission adhesive tape 3 1 The difference between them is calculated as follows:
△E 1 ＝E(t+1)-E0 1 (10)
s6, according to the difference value Delta E of the jumping amount 1 And the elongation of the screw rod of the servo electric cylinder 8 is adjusted by calculating and acting on an input pulse number U of the display control system for outputting and adjusting the servo electric cylinder 8 through a formula (6), a formula (7) and a formula (8), so that the tension or the relaxation of the transmission rubber belt 3 is realized.
(3) The operation process of the control model for adjusting the tensity by the up-down jumping amount and the surface temperature of the transmission rubber belt 3 is as follows:
s1, performing a simulation loading test on a transmission adhesive tape 3 on a high-power fatigue test bed, taking the tension of the transmission adhesive tape 3 as a variable, respectively acquiring the vertical jumping change of the transmission adhesive tape 3 in the steady-state operation process by using an ultrasonic sensor 5, acquiring the change rule of the surface temperature T of the adhesive tape in the steady-state operation process of the transmission adhesive tape 3 by using a thermal infrared temperature sensor 4, and establishing the jumping change quantity delta E 2 Temperature change amount DeltaT 2 And tension variation quantity DeltaD 3 The relationship between them is modeled as shown in equation (11):
△D 3 ＝f(△E 2 ，△T 2 ) (11)
s2, establishing the elongation L of the servo electric cylinder 8 screw rod 3 And tension degree D 3 The mathematical model therebetween is shown in equation (12):
D 3 ＝f(L 3 ) (12)
wherein the tension degree D 3 According to the amount of change of tension Delta D 3 Acquisition (prior art);
s3, establishing the elongation L of the servo electric cylinder 8 screw rod 3 Number of input pulses U of servo electric cylinder 8 3 Mathematical model of (1):
U 3 ＝L 3 *N 3 /h 3 (13)
wherein h is 3 Is the pitch of the servo electric cylinder 8 screw rod, N 3 The number of pulses required for each distance of advancing or retracting one pitch of the servo electric cylinder 8;
s4, calculating the temperature measured value T (T) and the jumping amount measured value E (T) of the transmission adhesive tape 3 at the current moment and a set value T0 respectively 2 And E0 2 The difference between them is calculated as follows:
△T 3 ＝T(t)-T0 2 (14)
△E 3 ＝E(t)-E0 2 (15)
s5, according to the temperature difference delta T 3 Delta difference of amount of run-out Delta E 3 And the elongation of the screw rod of the servo electric cylinder 8 is adjusted by calculating and acting on an input pulse number U of the display control system for outputting and adjusting the servo electric cylinder 8 through a formula (11), a formula (12) and a formula (13), so that the tension or the relaxation of the transmission rubber belt 3 is realized.
When the Hall sensor 18 detects that the rotating speed of the driving wheel 19 is less than or equal to 100r/min, the elongation of the screw rod of the servo electric cylinder 8 is adjusted by utilizing the control model operation until the transmission rubber belt 3 is loosened to the limit; when the torque sensor 22 measures that the torque of the driven wheel 2 is more than or equal to 100N/m, the elongation of the screw rod of the servo electric cylinder 8 is adjusted by utilizing the control model operation until the transmission rubber belt 3 is loosened to the limit.
The above-described embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above-described embodiments, and any obvious modifications, replacements, or variations which can be made by those skilled in the art without departing from the essence of the present invention belong to the protection scope of the present invention.
Claims (5)
1. The automatic adjusting device for the tension degree of the transmission belt of the combine harvester is characterized by comprising a driving wheel (19) and a driven wheel (2) which are connected through a transmission rubber belt (3), wherein the transmission rubber belt (3) is tensioned by a tensioning wheel (20), and a thermal infrared temperature sensor (4) and an ultrasonic sensor (5) are arranged above the transmission rubber belt (3); the tensioning wheel (20) is connected with the lower end of the spring connecting rod (15) through a tensioning spring (21), the upper end of the spring connecting rod (15) is connected with a screw rod of the servo electric cylinder (8) through a pair of fisheye bearings (11) which are distributed in a central symmetry mode, and the screw rod of the servo electric cylinder (8) is connected with a pull rod of the displacement sensor (7).
2. The automatic adjusting device for the tension of the transmission belt of the combine harvester according to claim 1, characterized in that a pair of fisheye bearings (11) are connected through a connecting shaft (14), and thrust rings (13) are respectively mounted on the outer sides of the connecting shaft (14).
3. The automatic adjusting device for the tension of the transmission belt of the combine harvester according to claim 1, characterized in that the screw rod of the servo electric cylinder (8) is connected with the pull rod of the displacement sensor (7) through a connecting piece (10).
4. The automatic adjusting device for the tension of the transmission belt of the combine harvester according to claim 1, characterized in that a Hall sensor (18) is mounted on the driving wheel (19), and a torque sensor (22) is mounted on the driven wheel (2).
5. The automatic adjusting device for the tension degree of the transmission belt of the combine harvester according to claim 4, characterized in that the signal lines of the temperature sensor (4), the ultrasonic sensor (5), the displacement sensor (7), the servo electric cylinder (8), the Hall sensor (18) and the torque sensor (22) are connected with a display control system.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221323515.1U CN218277876U (en) | 2022-05-30 | 2022-05-30 | Combine drive belt rate of tension automatic regulating apparatus |
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| CN202221323515.1U CN218277876U (en) | 2022-05-30 | 2022-05-30 | Combine drive belt rate of tension automatic regulating apparatus |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114847010A (en) * | 2022-05-30 | 2022-08-05 | 江苏大学 | Automatic adjusting device and method for tension degree of transmission belt of combine harvester |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114847010A (en) * | 2022-05-30 | 2022-08-05 | 江苏大学 | Automatic adjusting device and method for tension degree of transmission belt of combine harvester |
| CN114847010B (en) * | 2022-05-30 | 2023-10-10 | 江苏大学 | Automatic adjusting device and method for tension degree of combine harvester transmission belt |
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