Lifting saddle device of tractor

Abstract

The utility model discloses a tractor lifting saddle device which comprises a frame, a lifting platform, a saddle and a lifting oil cylinder, and further comprises an angle sensor, an oil pressure sensor and a detection valve group, the angle sensor is arranged on the side face of the lifting platform, the lifting platform is movably connected to the frame, the saddle is movably connected to the lifting platform, and the oil pressure sensor is arranged on the lifting oil cylinder. The lifting oil cylinder is movably connected with the vehicle frame, a piston rod assembly is movably arranged in the lifting oil cylinder and movably connected with the lifting platform, the detection valve set is fixedly connected with the vehicle frame, an inner cavity of the lifting oil cylinder is divided into a rodless cavity and a rod cavity through the piston rod assembly, a cavity A and a cavity B are formed in the detection valve set, the cavity A is connected with the rodless cavity, and the cavity B is connected with the rod cavity. The oil pressure sensor is fixedly arranged on the detection valve set and connected with the cavity A to detect the oil pressure value and the lifting height of the saddle, it is ensured that the saddle reaches the proper height, the bearing load of the saddle can be detected, and it is ensured that the saddle cannot exceed the bearable range of the saddle.

Description

Technical Field

[0001] This utility model relates to the field of tractor technology, and in particular to a tractor lifting saddle device. Background Technology

[0002] The tractor unit's overall controller is a highly integrated system responsible for receiving and executing the driver's operating commands, as well as monitoring and managing the vehicle's power system to ensure safe and efficient operation. The saddle is a crucial component of the tractor unit, used to match the trailer. Common tractor units typically have a fixed saddle structure, directly fixed to the frame with no height adjustment. While simple and reliable, this fixed saddle structure, due to its fixed height, cannot accommodate trailers of varying heights, resulting in poor versatility and low efficiency. To address this, some tractor units add lifting devices for simple saddle height adjustment. However, during actual trailer connection, the driver must visually adjust the saddle height, potentially requiring multiple adjustments to achieve the desired level. This is not only cumbersome but also inefficient, significantly increasing operation time. Furthermore, existing designs often fail to monitor the saddle's load in real time. When matching a trailer, the trailer's weight may exceed the saddle's load capacity, potentially damaging the entire lifting system and posing safety hazards over time. Therefore, improvements are necessary. Utility Model Content

[0003] The purpose of this utility model is to address the shortcomings and deficiencies of the existing technology by providing a tractor lifting saddle device. This device has a simple and reasonable structure, is easy to operate, can detect the lifting height of the saddle to ensure that the saddle reaches a suitable height, and can also detect the load that the saddle can bear to ensure that the saddle does not exceed its bearing capacity.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] This utility model discloses a tractor lifting saddle device, comprising a frame, a lifting platform, a saddle, and a lifting cylinder, and further comprising an angle sensor, a hydraulic pressure sensor, and a detection valve assembly. The angle sensor is fixedly mounted on the side of the lifting platform, which is movably connected to the frame. The saddle is movably connected to the lifting platform. The lifting cylinder is movably connected to the frame, and a piston rod assembly is movably mounted within the lifting cylinder. The output end of the piston rod assembly is movably connected to the lifting platform, and the piston rod assembly can push the lifting platform, causing it to rotate relative to the frame. The detection valve assembly is fixedly connected to the frame. The piston rod assembly divides the inner cavity of the lifting cylinder into a rodless chamber and a rod chamber. The detection valve assembly has independently provided chamber A and chamber B. Chamber A is connected to the rodless chamber, and chamber B is connected to the rod chamber. The hydraulic pressure sensor is fixedly mounted on the detection valve assembly and is connected to chamber A to detect the hydraulic pressure value of the rodless chamber.

[0006] Furthermore, the left end of the lifting platform is movably connected to the vehicle frame via a first pivot, and the lifting platform can rotate around the axis of the first pivot. The right end of the lifting platform is movably connected to the piston rod assembly via a second pivot, and the lifting platform can rotate around the axis of the second pivot. The saddle is movably connected to the rightmost end of the lifting platform via a third pivot, and the saddle is fixedly connected to the third pivot, and the lifting platform can rotate around the axis of the third pivot.

[0007] Furthermore, the horizontal rightward direction of the first rotating shaft and the vertical downward direction of the third rotating shaft, together with the lifting platform, form a right-angled triangle.

[0008] Furthermore, it also includes a support, which is fixedly connected to the vehicle frame, and the end of the lifting cylinder away from the piston rod assembly is movably connected to the bracket via a fourth pivot, and the lifting cylinder can rotate around the axis of the fourth pivot.

[0009] Furthermore, the lifting cylinder is a double-acting single-stage cylinder.

[0010] Furthermore, the detection valve assembly is provided with an A1 oil port and a B1 oil port that correspond to the lifting cylinder. The A1 oil port is connected to the A chamber and the rod chamber, respectively, and the B1 oil port is connected to the B chamber and the rodless chamber, respectively. The detection valve assembly is also provided with an A oil port and a B oil port. The A oil port is connected to the A chamber, and the B oil port is connected to the B chamber.

[0011] Furthermore, there are two lifting cylinders, and two oil ports, A1 and B1, are also provided to cooperate with the lifting cylinders.

[0012] Furthermore, one of the oil ports A and B is connected to the power source to receive high-pressure oil provided by the system, while the other oil port receives low-pressure oil from the lifting cylinder and guides the low-pressure oil back to the oil tank.

[0013] Furthermore, the oil pressure sensor is provided with a first signal output interface, which is electrically connected to the vehicle controller of the tractor through a first wiring harness. The oil pressure sensor converts the collected oil pressure value into an electrical signal and transmits it to the vehicle controller.

[0014] Furthermore, the angle sensor is provided with a second signal output interface, which is electrically connected to the vehicle controller of the tractor through a second wiring harness. The angle sensor converts the collected angle information into an electrical signal and transmits it to the vehicle controller.

[0015] The beneficial effects of this utility model are as follows: The tractor lifting saddle device described in this utility model can detect the lifting height of the saddle to ensure that the saddle reaches a suitable height, and can also detect the load-bearing capacity of the saddle to ensure that the saddle does not exceed its bearing capacity. The principle of detecting the lifting height is as follows: the distance between the first and third rotating shafts is a constant value L, and the horizontal rightward direction of the lifting platform relative to the first rotating shaft is a changing angle α; when the saddle is in the initial position, the saddle height is the initial height H1, and the lifting platform is at the minimum angle α1 position. The angle sensor detects the minimum angle at this position and calibrates this angle as 0°; when the saddle needs to be adjusted to the lifting position, the lifting cylinder can be operated to push the first rotating shaft of the lifting platform to rotate upward. When the rotation angle is α, the saddle height H = L * Sin(α + α1) can be obtained by the Pythagorean theorem, where L and α1 are constant values, and the angle α can be directly detected by the angle sensor, thereby realizing the detection of the saddle lifting height.

[0016] The principle of load detection by the saddle is as follows: When the saddle is matched with the trailer, the trailer applies a vertically downward load G to the saddle. This load G is transmitted to the frame and lifting cylinder through the lifting platform. Force analysis of the lifting platform shows that to overcome the load G, the lifting cylinder applies an upward thrust F along its axis. According to the principle of torque balance, G*L1 = F*L2, where L1 and L2 are the lever arm lengths. When the saddle is stationary... The constant thrust F is generated by the lifting cylinder, and its value is F=P*S, where S is the area of ​​the rodless chamber of the lifting cylinder, which is a constant, and P is the oil pressure value of the rodless chamber of the lifting cylinder, which can be directly detected by the oil pressure sensor on the detection valve group. Finally, the load G=F*L2 / L1=PS*L2 / L1 can be obtained, where S, L1, and L2 are constants. Therefore, it can be simplified to G=K*P, where K is a coefficient, which is calculated by specific design, thereby realizing the detection of the load borne by the saddle. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the lifting process of this utility model;

[0019] Figure 3 This is a schematic diagram of the force analysis of this utility model;

[0020] Figure 4 This is a schematic diagram of the detection valve assembly;

[0021] Figure 5 This is a schematic diagram of the first cross-sectional structure of the detection valve assembly;

[0022] Figure 6 This is a schematic diagram of the second cross-sectional structure of the detection valve assembly;

[0023] Figure 7 This is a schematic diagram of the third cross-sectional structure of the detection valve assembly.

[0024] Figures 1-7 In the middle: 1. Frame; 11. Support; 2. Lifting platform; 21. First pivot; 22. Second pivot; 23. Third pivot; 3. Saddle; 4. Lifting cylinder; 41. Piston rod assembly; 42. Fourth pivot; 5. Angle sensor; 6. Hydraulic pressure sensor; 7. Detection valve group; 71. Chamber A; 72. Chamber B; 73. Oil port A1; 74. Oil port B1; 75. Oil port A; 76. Oil port B. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings.

[0026] like Figures 1-7The illustrated tractor lifting saddle device includes a frame 1, a lifting platform 2, a saddle 3, and a lifting cylinder 4. The lifting platform 2 is movably connected to the frame 1, the saddle 3 is movably connected to the lifting platform 2, and the lifting cylinder 4 is movably connected to the frame 1. Preferably, in this embodiment, the lifting cylinder 4 is a double-acting single-stage cylinder. Under hydraulic pressure, the double-acting single-stage cylinder can move in two directions, thereby realizing lifting and lowering actions. This type of cylinder also has strong pressure resistance, can adapt to high-intensity working environments, and ensures stable operation of the equipment. A piston rod assembly 41 is movably installed inside the lifting cylinder 4. Specifically, the piston rod assembly 4... The lifting cylinder 4 includes a piston and a piston rod, the piston and piston rod being fixedly connected. The piston rod assembly 41 divides the inner cavity of the lifting cylinder 4 into a rodless chamber and a rod chamber. The output end of the piston rod assembly 41 is movably connected to the lifting platform 2. The saddle 3 is used to match the trailer. When the lifting platform 2 is raised or lowered, the saddle 3 can move up and down accordingly, thereby adjusting the height of the saddle 3 to match trailers of different heights, greatly improving its versatility and applicability. Specifically, the left end of the lifting platform 2 is movably connected to the frame 1 via a first rotating shaft 21, and the lifting platform 2 can rotate around the axis of the first rotating shaft 21. The right end of the lifting platform 2 is connected to the frame 1 via a second rotating shaft 21. The lifting platform 2 is movably connected to the piston rod assembly 41 and can rotate around the axis of the second rotating shaft 22. The saddle 3 is movably connected to the rightmost end of the lifting platform 2 via the third rotating shaft 23. The saddle 3 is fixedly connected to the third rotating shaft 23, and the lifting platform 2 can rotate around the axis of the third rotating shaft 23. The system also includes an angle sensor 5, a hydraulic pressure sensor 6, and a detection valve assembly 7. The angle sensor 5 is fixedly installed on the side of the lifting platform 2. Specifically, the angle sensor 5 is fixedly connected to the lifting platform 2 by bolts to ensure a stable and reliable connection. The piston rod assembly 41 can push the lifting platform 2, allowing the lifting platform 2 to rotate relative to the vehicle frame 1. The angle sensor 5... The system detects the angle change between the lifting platform 2 and the frame 1, thereby detecting the lifting height of the saddle 3 to ensure that the saddle 3 reaches a suitable height. The detection valve assembly 7 is fixedly connected to the frame 1. Specifically, the detection valve assembly 7 is fixed to the frame 1 by bolts to ensure a stable and reliable connection. The detection valve assembly 7 has two independent chambers, A chamber 71 and B chamber 72. Chamber A 71 is connected to the rodless chamber, and chamber B 72 is connected to the rod chamber. The hydraulic pressure sensor 6 is fixedly installed on the detection valve assembly 7. The hydraulic pressure sensor 6 is connected to chamber A 71 to detect the hydraulic pressure value of the rodless chamber, thereby detecting the load on the saddle 3 to ensure that the saddle 3 does not exceed its bearing capacity.

[0027] Preferably, in this embodiment, refer to Figure 1It also includes a support 11, which is fixedly connected to the frame 1 to ensure a stable and reliable connection. The end of the lifting cylinder 4 away from the piston rod assembly 41 is movably connected to the bracket through a fourth rotating shaft 42. The lifting cylinder 4 can rotate around the axis of the fourth rotating shaft 42.

[0028] Preferably, in this embodiment, refer to Figures 4-7 The detection valve assembly 7 is provided with an A1 port 73 and a B1 port 74 corresponding to the lifting cylinder 4. The A1 port 73 is connected to the A chamber 71 and the rod chamber, respectively, and the B1 port 74 is connected to the B chamber 72 and the rodless chamber, respectively. The detection valve assembly 7 is also provided with an A port 75 and a B port 76. The A port 75 is connected to the A chamber 71, and the B port 76 is connected to the B chamber 72. Preferably, in this embodiment, one of the A port 75 and the B port 76 is connected to the power source through a hydraulic pipeline and received by the system. The system provides high-pressure oil, while another port receives low-pressure oil from the lifting cylinder 4 and returns the low-pressure oil to the system's oil tank. Specifically, when high-pressure oil is introduced into port A 75, the piston rod assembly 41 extends, pushing the lifting platform 2 to rotate around the axis of the first rotating shaft 21. The lifting platform 2 rises, and the saddle 3 rises accordingly. At this time, the oil in the rod chamber returns to the oil tank through port B 76. When high-pressure oil is introduced into port B 76, the piston rod assembly 41 retracts, the lifting platform 2 descends, and the saddle 3 descends accordingly. At this time, the oil in the rodless chamber returns to the oil tank through port A 75.

[0029] Preferably, in this embodiment, to ensure the safe and stable movement of the lifting platform 2, two lifting cylinders 4 are provided, and two oil ports A1 73 and B1 74 corresponding to the lifting cylinders 4 are also provided.

[0030] Preferably, in this embodiment, the oil pressure sensor 6 is provided with a first signal output interface, which is electrically connected to the vehicle controller of the tractor through a first wiring harness. The oil pressure sensor 6 converts the collected oil pressure value into an electrical signal and transmits it to the vehicle controller.

[0031] Preferably, in this embodiment, the angle sensor 5 is provided with a second signal output interface, which is electrically connected to the vehicle controller of the tractor through a second wiring harness. The angle sensor 5 converts the collected angle information into an electrical signal and transmits it to the vehicle controller.

[0032] Preferably, in this embodiment, refer to Figure 2 The first rotating shaft 21, in its horizontal rightward direction, and the third rotating shaft 23, in its vertical downward direction, together with the lifting platform 2, form a right-angled triangle, which allows for more stable and precise control of its position and angle.

[0033] See Figure 2 The principle of saddle 3 for detecting lifting height is as follows: The distance between the first rotating shaft 21 and the third rotating shaft 23 is a constant value L, and the horizontal rightward direction of the lifting platform 2 and the first rotating shaft 21 is a changing angle α. When saddle 3 is in the initial position, the height of saddle 3 is the initial height H1, and the lifting platform 2 is in the position of the minimum angle α1. The angle sensor 5 detects the minimum angle at this position and calibrates this angle as 0°. When saddle 3 needs to be adjusted to the lifting position, the lifting cylinder 4 can be operated to push the first rotating shaft of the lifting platform 2 to rotate upward. When the rotation angle is α, the height of saddle 3 H = L * Sin(α + α1) can be obtained by the Pythagorean theorem, where L and α1 are constant values, and the angle α can be directly detected by the angle sensor 5, thereby realizing the detection of the lifting height of saddle 3.

[0034] See Figure 3 The principle of load detection by saddle 3 is as follows: When saddle 3 is matched with the trailer, the trailer will apply a vertically downward load G to saddle 3. The load G will be transmitted to the frame 1 and the lifting cylinder 4 through the lifting platform 2. Force analysis of the lifting platform 2 shows that to overcome the load G, the lifting cylinder 4 will apply an upward thrust F along the axis of the lifting cylinder 4 to the lifting platform 2. According to the principle of torque balance, we can obtain: G*L1 = F*L2, where L1 and L2 are the lever arm lengths. When saddle 3 is stationary... The state is constant, and the thrust F is generated by the lifting cylinder 4. Its value is F=P*S, where S is the area of ​​the rodless chamber of the lifting cylinder 4, which is a constant, and P is the oil pressure value of the rodless chamber of the lifting cylinder 4, which can be directly detected by the oil pressure sensor 6 on the detection valve group 7. Finally, the load G=F*L2 / L1=PS*L2 / L1 can be obtained, where S, L1, and L2 are constants. Therefore, it can be simplified to G=K*P, where K is a coefficient, which is calculated by the specific design, thereby realizing the detection of the load borne by the saddle 3.

[0035] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A tractor lifting saddle device comprising a frame (1), a lifting platform (2), a saddle (3) and a lifting cylinder (4), characterized in that: The angle sensor (5), the oil pressure sensor (6) and the detection valve group (7) are further included, the angle sensor (5) is fixedly arranged on the side of the lifting platform (2), the lifting platform (2) is movably connected to the frame (1), the saddle (3) is movably connected to the lifting platform (2), the lifting oil cylinder (4) is movably connected to the frame (1), the piston rod assembly (41) is movably arranged in the lifting oil cylinder (4), the output end of the piston rod assembly (41) is movably connected to the lifting platform (2), the piston rod assembly (41) can push the lifting platform (2), so that the lifting platform (2) rotates relative to the frame (1), the detection valve group (7) is fixedly connected to the frame (1), the piston rod assembly (41) divides the inner cavity of the lifting oil cylinder (4) into a rodless cavity and a rod cavity, the detection valve group (7) is independently provided with an A cavity (71) and a B cavity (72) respectively, the A cavity (71) is connected with the rodless cavity, the B cavity (72) is connected with the rod cavity, the oil pressure sensor (6) is fixedly arranged on the detection valve group (7), and the oil pressure sensor (6) is connected with the A cavity (71) to detect the oil pressure value of the rodless cavity.

2. A tow vehicle lifting saddle device as claimed in claim 1, characterised in that: The left end of the lifting platform (2) is movably connected to the frame (1) through a first rotating shaft (21), the lifting platform (2) can rotate around the axis of the first rotating shaft (21), the right end of the lifting platform (2) is movably connected to the piston rod assembly (41) through a second rotating shaft (22), the lifting platform (2) can rotate around the axis of the second rotating shaft (22), and the saddle (3) is movably connected to the rightmost end of the lifting platform (2) through a third rotating shaft (23), the saddle (3) is fixedly connected with the third rotating shaft (23), and the lifting platform (2) can rotate around the axis of the third rotating shaft (23).

3. A tow vehicle lifting saddle apparatus as claimed in claim 2, wherein: The horizontal right direction of the first rotating shaft (21) and the vertical downward direction of the third rotating shaft (23) cooperate with the lifting platform (2) to form a right-angled triangle.

4. A tow vehicle lifting saddle apparatus as claimed in claim 1, wherein: The support (11) is further included, the support (11) is fixedly connected with the frame (1), one end of the lifting oil cylinder (4) away from the piston rod assembly (41) is movably connected with the support through a fourth rotating shaft (42), and the lifting oil cylinder (4) can rotate around the axis of the fourth rotating shaft (42).

5. A tow vehicle lifting saddle apparatus as claimed in claim 1, wherein: The lifting oil cylinder (4) is a double-acting single-stage oil cylinder.

6. A tow vehicle lifting saddle apparatus as claimed in claim 1, wherein: The detection valve group (7) is provided with an A1 oil port (73) and a B1 oil port (74) corresponding to the lifting oil cylinder (4), the A1 oil port (73) is respectively connected with the A cavity (71) and the rod cavity, the B1 oil port (74) is respectively connected with the B cavity (72) and the rodless cavity, the detection valve group (7) is further provided with an A oil port (75) and a B oil port (76), the A oil port (75) is connected with the A cavity (71), and the B oil port (76) is connected with the B cavity (72).

7. A tow vehicle lifting saddle apparatus as claimed in claim 6, characterised in that: The lifting oil cylinder (4) is provided with two A1 oil ports (73) and B1 oil ports (74) corresponding to the lifting oil cylinder (4).

8. A tow vehicle lifting saddle apparatus as claimed in claim 6, characterised in that: One of the A oil port (75) and the B oil port (76) is connected with the power source to receive high-pressure oil provided by the system, and the other receives low-pressure oil in the lifting oil cylinder (4) to guide the low-pressure oil back to the oil tank.

9. A tow vehicle lifting saddle apparatus as claimed in claim 1, wherein: The oil pressure sensor (6) is provided with a first signal output interface electrically connected with the vehicle controller of the towing vehicle through a first wire harness, and the oil pressure sensor (6) converts the collected oil pressure value into an electric signal and transmits the electric signal to the vehicle controller.

10. A tow vehicle lifting saddle apparatus as described in claim 1, further comprising: The angle sensor (5) is provided with a second signal output interface electrically connected with the vehicle controller of the towing vehicle through a second wire harness, and the angle sensor (5) converts the collected angle information into an electric signal and transmits the electric signal to the vehicle controller.

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