Tractor pull-down rod mounting and fixing device with tension feedback function

Abstract

The utility model discloses a tractor pull-down rod mounting and fixing device with a pull force feedback function, which comprises a transmission case, pull-down rod supports are arranged on two sides of the transmission case, a partition plate is arranged on one side of each pull-down rod support, a clamping plate is arranged on one side of each partition plate, and a pull force sensor is arranged in the partition plate and the clamping plate in a penetrating manner. When the lower pull rod can freely rotate around the tension sensor installed in the lower pull rod support and the tension is increased and exceeds a set resistance value, the tension sensor receives a deformation sensing signal and transmits the deformation sensing signal to the controller, and the controller receives the signal to judge that the resistance is too large and sends an instruction to the lifting oil cylinder to control the oil inlet electromagnetic valve to reverse. High-pressure oil enters the lifting oil cylinder to lift the lower pull rod until the resistance value of the lower pull rod is close to the set value, the oil cylinder stops feeding oil, the lower pull rod keeps the tilling depth of the current position and the current traction force, and in the process, the lower pull rod can rotate downwards along with the reduction of the resistance value to increase the tilling depth so as to maintain the set traction power and improve the operation efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of tractors, in particular to a mounting and fixing device for a tractor's pull-rod with tension feedback Background Art

[0002] Tractors are multi-functional power machines that can carry different implements to meet different operation requirements. With the development of society, people's requirements for tractor functions are getting higher and higher, especially for traction control, which directly affects the engine's working efficiency. This requires tractors to have a resistance adjustment function. The relatively old resistance adjustment mechanisms on the market are all mechanical resistance sensing mechanisms. Through springs and mechanical levers, the resistance signal on the plow is converted into a displacement signal, and then the displacement signal is transmitted to the lift valve control rod through a lever to control the lifting of the lift

[0003] To solve the above pain points, an electronically controlled lift mechanism with resistance feedback has emerged. By using sensors to instantaneously collect resistance signals and feedback them to the controller, and then the controller transmits the resistance signal to the electromagnetic control valve to control the lifting of the lift. The positions of the tension sensors on the market are diverse, but the resistance signals of the pull rods collected by them are poor, affecting the operation efficiency Summary of the Utility Model

[0004] The purpose of the utility model is to provide a mounting and fixing device for a tractor's pull-rod with tension feedback. By arranging the tension sensor on the pull-rod support, the resistance signal of the pull-rod can be effectively collected, thereby improving the operation efficiency

[0005] To achieve the above purpose, a mounting and fixing device for a tractor's pull-rod with tension feedback is provided, including a transmission case. On both sides of the transmission case, there are pull-rod supports. On one side of the pull-rod support, there is a partition plate. On one side of the partition plate, there is a clamping plate. A tension sensor is penetrated through the interior of the partition plate and the clamping plate. On one side of the clamping plate, there is a protective cover. On the outer surface of the tension sensor, there is a self-lubricating bushing. On the outer surface of the self-lubricating bushing, there is a pull-rod. The pull-rod and the self-lubricating bushing are sleeved on the tension sensor and fixed in the U-shaped groove of the pull-rod support

[0006] According to the mounting and fixing device for a tractor's pull-rod with tension feedback, a double-headed stud is threadedly connected inside the pull-rod support. A nut is threadedly connected to the outer surface of the double-headed stud. A third spring washer is arranged on the outer surface of the double-headed stud. The pull-rod support is fixedly connected to the transmission case through the double-headed stud, the nut, and the third spring washer

[0007] According to the described installation and fixing device for the drawbar with tensile force feedback of a tractor, a support spacer sleeve is arranged inside the partition plate and the clamping plate, a fixing bolt is arranged inside the support spacer sleeve, a first spring washer is arranged on the outer surface of the fixing bolt, and the partition plate and the clamping plate are fixedly connected to the drawbar support through the support spacer sleeve, the fixing bolt and the first spring washer.

[0008] According to the described installation and fixing device for the drawbar with tensile force feedback of a tractor, a screw is threadedly connected inside the protective cover, a second spring washer is arranged on the outer surface of the screw, and the protective cover is fixedly connected to the clamping plate through the screw and the second spring washer.

[0009] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0010] For the installation and fixing device for the drawbar with tensile force feedback of a tractor, when the drawbar can freely rotate around the tensile force sensor installed in the drawbar support, when the applied tensile force increases and exceeds the set resistance value, the tensile force sensor receives the deformation induction signal and transmits it to the controller. The controller receives the signal, judges that the resistance is too large, and sends an instruction to reverse the oil inlet solenoid valve of the lifting oil cylinder, so that the high-pressure oil enters the lifting oil cylinder to lift the drawbar until the resistance value of the drawbar returns to near the set value, and the oil cylinder stops feeding oil. The drawbar maintains the current position and the tillage depth maintains the current traction force. In the above process, the drawbar can also rotate downward with the decrease of the resistance value to increase the tillage depth to maintain the set traction power and improve the operation efficiency.

[0011] The additional aspects and advantages of the present utility model will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present utility model will be further described below in conjunction with the drawings and embodiments;

[0013] Figure 1 It is a three-dimensional view of the installation and fixing device for the drawbar with tensile force feedback of a tractor of the present utility model;

[0014] Figure 2 It is a top view of the installation and fixing device for the drawbar with tensile force feedback of a tractor of the present utility model;

[0015] Figure 3 It is an exploded view of the installation and fixing device for the drawbar with tensile force feedback of a tractor of the present utility model.

[0016] In the figure: 1. Fixed bolt; 2. First spring washer; 3. Support spacer; 4. Protective cover; 5. Screw; 6. Second spring washer; 7. Tensile sensor; 8. Lower pull rod support; 9. Nut; 10. Stud; 11. Third spring washer; 12. Clamping plate; 13. Partition plate; 14. Self-lubricating bushing; 15. Lower pull rod; 16. Transmission case. Specific implementation mode

[0017] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0018] Please refer to Figures 1 - 3 , the embodiments of the present invention provide a technical solution: a tractor with a pull-force feedback lower pull rod installation and fixing device, including a transmission case 16. Lower pull rod supports 8 are arranged on both sides of the transmission case 16. A partition plate 13 is arranged on one side of the lower pull rod support 8. A clamping plate 12 is arranged on one side of the partition plate 13. A tensile sensor 7 is penetrated through the partition plate 13 and the clamping plate 12. A protective cover 4 is arranged on one side of the clamping plate 12 to protect the electrical plug-in of the tensile sensor 7. A self-lubricating bushing 14 is arranged on the outer surface of the tensile sensor 7 to lubricate the tensile sensor 7 and the ball joint, reducing wear. A lower pull rod 15 is arranged on the outer surface of the self-lubricating bushing 14. The tensile sensor 7 passes through the partition plate 13 and the lower pull rod support 8, and the end plane of the tensile sensor 7 is clamped by the clamping plate 12 to prevent the tensile sensor 7 from rotating, so as to collect tensile and thrust signals. The length of the support spacer 3 is slightly higher than the sum of the thicknesses of the partition plate 13 and the clamping plate 12, so that the tensile sensor 7 has some axial play clearance to improve the signal acquisition quality of the tensile sensor 7. The lower pull rod 15 and the self-lubricating bushing 14 are sleeved on the tensile sensor 7 and fixed in the U-shaped groove of the lower pull rod support 8. The center line of the U-shaped groove coincides with the theoretical dimensions of the ball joint center of the lower pull rod 15 and the signal inductor center of the tensile sensor 7. When the lower pull rod 15 is stressed, it causes the deformation of the induction area of the tensile sensor 7, and the signal is transmitted to the controller to play a role in pull-force feedback.

[0019] A stud 10 is threadedly connected inside the lower pull rod support 8. A nut 9 is threadedly connected to the outer surface of the stud 10. A third spring washer 11 is arranged on the outer surface of the stud 10. The lower pull rod support 8 is fixedly connected to the transmission case 16 through the stud 10, the nut 9, and the third spring washer 11.

[0020] Inside the partition plate 13 and the clamping plate 12, there is a support spacer sleeve 3. Inside the support spacer sleeve 3, there is a fixing bolt 1. On the outer surface of the fixing bolt 1, there is a first spring washer 2. The partition plate 13 and the clamping plate 12 are fixedly connected to the lower pull rod support 8 through the support spacer sleeve 3, the fixing bolt 1, and the first spring washer 2.

[0021] Inside the protective cover 4, there is a screw 5 connected by internal threads. On the outer surface of the screw 5, there is a second spring washer 6. The protective cover 4 is fixedly connected to the clamping plate 12 through the screw 5 and the second spring washer 6.

[0022] Working principle: During use, the lower pull rod 15 rotates freely around the tension sensor 7 installed in the lower pull rod support 8. When the applied tension increases and exceeds the set resistance value, the tension sensor 7 receives the deformation induction signal and transmits it to the controller. The controller receives the signal, determines that the resistance is too large, and sends an instruction to the oil inlet solenoid valve of the lifting oil cylinder to reverse the direction, so that high-pressure oil enters the lifting oil cylinder to lift the lower pull rod 15 until the resistance value of the lower pull rod 15 returns to near the set value. The oil cylinder stops feeding oil, and the lower pull rod 15 maintains the current position, the tillage depth, and the current traction force. In the above process, the lower pull rod 15 can also rotate downward with the decrease of the resistance value to increase the tillage depth, so as to maintain the set traction power and improve the operation efficiency.

[0023] The above has described the embodiments of the present invention in detail with reference to the drawings. However, the present invention is not limited to the above embodiments. Within the knowledge scope of those of ordinary skill in the art to which it pertains, various changes can also be made without departing from the gist of the present invention.

Claims

1. A pull-rod installation and fixing device for a tractor with tensile feedback, comprising a transmission case (16), characterized in that, On both sides of the transmission case (16), there are lower pull rod supports (8). On one side of the lower pull rod support (8), there is a partition plate (13). On one side of the partition plate (13), there is a clamping plate (12). A tension sensor (7) is disposed through the partition plate (13) and the clamping plate (12). On one side of the clamping plate (12), there is a protective cover (4). A self-lubricating bushing (14) is disposed on the outer surface of the tension sensor (7). A lower pull rod (15) is disposed on the outer surface of the self-lubricating bushing (14). The lower pull rod (15) and the self-lubricating bushing (14) are sleeved on the tension sensor (7) and fixed in the U-shaped groove of the lower pull rod support (8).

2. The installation and fixing device of the drawbar with tensile force feedback for a tractor according to claim 1, characterized in that: A stud (10) is threadedly connected inside the lower pull rod support (8). A nut (9) is threadedly connected to the outer surface of the stud (10). A third spring washer (11) is disposed on the outer surface of the stud (10). The lower pull rod support (8) is fixedly connected to the transmission case (16) through the stud (10), the nut (9), and the third spring washer (11).

3. A pull rod mounting and fixing device for a tractor with tensile force feedback as described in claim 1, characterized in that: A support spacer (3) is disposed inside the partition plate (13) and the clamping plate (12). A fixing bolt (1) is disposed inside the support spacer (3). A first spring washer (2) is disposed on the outer surface of the fixing bolt (1). The partition plate (13) and the clamping plate (12) are fixedly connected to the lower pull rod support (8) through the support spacer (3), the fixing bolt (1), and the first spring washer (2).

4. The installation and fixing device of a tractor's drawbar with tensile force feedback as described in claim 1, characterized in that: A screw (5) is threadedly connected inside the protective cover (4). A second spring washer (6) is disposed on the outer surface of the screw (5). The protective cover (4) is fixedly connected to the clamping plate (12) through the screw (5) and the second spring washer (6).

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