An electrically powered towed vehicle saddle

Abstract

This invention discloses an electric tractor saddle, relating to the field of tractor saddle technology. It includes two base assemblies; a support assembly rotatably mounted on the base assemblies; two pins passing through the joints between the base assemblies and the support assemblies to hinge them together; a cavity formed between the outer surface of each pin and the inner walls of the base and support assemblies, the cavity being filled with air, using air as the supporting medium to achieve non-contact support of the pins relative to the base and support assemblies, reducing wear during relative rotation; and a sealing assembly disposed on the base assemblies. By creating cavities between the pins and the base and support assemblies, and filling these cavities with air as the supporting medium, non-contact suspension support is achieved for the pins, ensuring that the pins maintain minimal direct contact with the base and support assemblies during operation.

Description

Technical Field

[0001] This invention relates to the field of tractor saddle technology, specifically to an electric tractor saddle. Background Technology

[0002] The electric tractor saddle is a key load-bearing component on an electric tractor unit used to connect and lock the trailer. Its core function is to replace traditional purely mechanical or pneumatic operation with an electric control system, allowing the driver to automatically lock and release the tow pin with a single button press from inside the cab, significantly improving docking efficiency and safety. These saddles typically integrate sensors to monitor the locking status in real time, have anti-mis-unhooking capabilities, and can adapt to heavy-load, high-frequency, and complex road conditions in logistics scenarios. They are the core execution unit for achieving unmanned and efficient transfer in modern intelligent warehousing, port terminals, and factory internal logistics.

[0003] Existing electric tractor saddles typically consist of two sets of base assemblies, support assemblies, and pins. During assembly, the pins are inserted into the mating holes of the base and support assemblies, allowing the outer wall of the pin to directly contact the inner walls of the base and support assemblies, thus achieving a rotatable connection. During long-term use, the pins continuously rub against the base and support assemblies due to direct contact, easily causing wear and deformation of the internal mating parts. Simultaneously, metal shavings generated by friction tend to accumulate in the mating gaps, not only accelerating component wear but also affecting the saddle's rotational flexibility and operational reliability. Furthermore, the existing structure lacks corresponding detection mechanisms, making it impossible to accurately monitor the wear, deformation, and shavings accumulation of the internal components in real time, hindering the early prediction of potential malfunctions. Summary of the Invention

[0004] To achieve the above objectives, the present invention provides the following technical solution: an electric tractor saddle, comprising: Two base components; A support assembly is rotatably mounted on the base assembly; Two pins are inserted at the joint between the base assembly and the support assembly to hinge the base assembly and the support assembly. A cavity is formed between the outer surface of the pin and the inner wall of the base assembly and the inner wall of the support assembly. The cavity is filled with air, and the air is used as the support medium to achieve non-contact support of the pin relative to the base assembly and the support assembly, thereby reducing wear caused by relative rotation. A sealing assembly, disposed on the base assembly, is used to seal the mating gap between the pin, the base assembly, and the support assembly, thereby ensuring the airtightness of the cavity; An inflation assembly, disposed on the pin, is used to inflate the cavity with external air to maintain a stable air pressure inside the cavity; The detection component includes a housing, a detection head, and an elastic sheet. The housing is disposed at the bottom of the base assembly and is connected to a cavity. The detection head and the elastic sheet are both disposed inside the housing. The elastic sheet divides the housing into a first cavity and a second cavity. The detection head is located inside the first cavity and is used to detect the deformation of the elastic sheet to determine the air pressure change and waste accumulation in the cavity.

[0005] Preferably, the elastic sheet is in the shape of a downwardly concave arc, and the detection head is located above the elastic sheet for accurately detecting the deformation range of the elastic sheet.

[0006] Preferably, the base assembly includes a support base and a connecting sleeve. The connecting sleeve is disposed on the top of the support base. The inner wall of the connecting sleeve is provided with a chip removal groove for collecting waste chips generated during use. A connecting hole is provided between the chip removal groove and the housing. The chip removal groove sends air and waste chips into the housing through the connecting hole for detection by the detection component.

[0007] Preferably, the support assembly includes a top plate and at least two connecting plates. The connecting plates are vertically disposed at the bottom of the top plate. The connecting sleeve abuts against the connecting plate. A through hole is provided on the connecting plate. The through hole is coaxially disposed with the connecting sleeve. The pin is inserted into the through hole and the connecting sleeve to realize the hinge connection between the base assembly and the support assembly.

[0008] Preferably, the pin includes a rod and a baffle. The rod is fixedly connected to the baffle. A nut is threaded onto the outer surface of the rod. One end of the nut abuts against the connecting plate. The base assembly and the support assembly are installed by the cooperation of the pin and the nut.

[0009] Preferably, the sealing assembly includes at least two sealing sleeves, an annular sealing gasket, and an annular sealing ring. The sealing sleeves are fitted onto the outer surface of the pin to seal the cavity. The sealing sleeves, annular sealing gaskets, and annular sealing rings are all made of hydrogenated nitrile rubber.

[0010] Preferably, the connecting plate has an annular sealing groove at one end near the connecting sleeve, and the annular sealing gasket and the annular sealing ring are both disposed inside the annular sealing groove to seal the gap between the base assembly and the support assembly.

[0011] Preferably, the inflation assembly includes an air pump and a one-way valve. The air pump is disposed at the end of the pin, and the pin has an inlet hole. One end of the inlet hole is connected to the output end of the air pump, and the other end of the inlet hole is connected to the cavity.

[0012] Preferably, the inlet includes a first air inlet and a plurality of second air inlets. The first air inlet and the plurality of second air inlets are both opened inside the pin. One end of the first air inlet is connected to the output end of the air pump, and the other end of the first air inlet is connected to one end of the plurality of second air inlets. The other ends of the plurality of second air inlets are equidistantly distributed on the circumferential surface of the pin, so that air is evenly filled into the cavity.

[0013] Preferably, the one-way valve is disposed inside the first air inlet to allow air to flow into the cavity in one direction.

[0014] This invention provides an electric tractor saddle. It has the following beneficial effects: I. This electric tractor saddle, by setting a cavity between the pin and the base assembly and support assembly, and filling the cavity with gas, uses air as the support medium to achieve non-contact suspension support for the pin. This ensures that the pin maintains as little direct contact as possible with the base assembly and support assembly during operation, thereby reducing friction and wear caused by the relative rotation of the three components. This significantly extends the service life of the base assembly, support assembly, and pin, and improves the overall reliability and operational stability of the saddle.

[0015] II. The electric tractor saddle features a detection component. When the air pressure inside the cavity is normal and there is no debris or only a small amount of debris, air enters the first cavity, keeping the elastic sheet in its normal shape. The detection head, upon detecting that the distance is within the normal range, sends a signal to an external receiver, allowing the user to know that the saddle is in normal working condition. When the air pressure inside the cavity decreases and leakage occurs, the gas pressure entering the first cavity decreases. Under the pressure difference, the gas in the second cavity pushes the elastic sheet upwards, causing it to deform. The detection head, upon detecting the shortened distance, sends a signal, allowing the user to know that the air pressure has dropped and that air needs to be added and the sealing component replaced. When the amount of debris inside the cavity increases, the debris entering the first cavity falls onto the elastic sheet, causing it to deform downwards. This increases the distance between the detection head and the elastic sheet. The detection head, upon detecting the increased distance, sends a signal, allowing the user to determine that there is an increase in debris and that the saddle needs to be checked and replaced promptly.

[0016] Third, the electric tractor saddle is equipped with an inflation component to fill the cavity with external air, maintain the stability of the air pressure inside the cavity, and keep the pin in a non-contact state with the base assembly and support assembly as much as possible by replenishing the gas as needed, thereby reducing frictional loss during relative rotation and ensuring the long-term stability and service life of the saddle. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the external structure of the electric tractor saddle of the present invention; Figure 2 This is a bottom view of the base assembly and detection assembly of the present invention; Figure 3 This is a schematic diagram showing the connection of the base assembly, connecting plate, and pin of the present invention; Figure 4 In this invention Figure 3 A schematic diagram of the cross-sectional structure; Figure 5 This is a cross-sectional structural diagram of the detection component of the present invention; Figure 6 For the present invention Figure 4 Enlarged structural diagram at point A; Figure 7 This is a schematic diagram showing the connection between the pin and the inflation assembly of the present invention.

[0018] In the diagram: 1. Base assembly; 11. Support base; 12. Connecting sleeve; 13. Chip removal groove; 2. Support assembly; 21. Top plate; 22. Connecting plate; 23. Through hole; 3. Pin; 31. Insert rod; 32. Baffle; 4. Nut; 5. Sealing assembly; 51. Sealing sleeve; 52. Annular sealing gasket; 53. Annular sealing ring; 54. Annular sealing groove; 6. Inflation assembly; 61. Air pump; 62. One-way valve; 63. Inlet hole; 631. First air inlet hole; 632. Second air inlet hole; 7. Detection assembly; 71. Housing; 72. Detection head; 73. Elastic sheet; 74. First cavity; 75. Second cavity; 76. Connecting hole; 8. Cavity. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for a particular purpose.

[0020] like Figures 1 to 7 As shown, the present invention provides a technical solution: an electric tractor saddle, including two base assemblies 1, a support assembly 2 and two pins 3. The support assembly 2 is rotatably mounted on the base assembly 1, and the pins 3 are inserted at the joint between the base assembly 1 and the support assembly 2 to hinge the base assembly 1 and the support assembly 2, so that the support assembly 2 can be flipped relative to the base assembly 1.

[0021] It should be noted that the support assembly 2 of the electric tractor saddle in this invention is equipped with a key load-bearing component for connecting and locking the trailer. Its core function is to replace traditional purely mechanical or pneumatic operation with an electric control system, enabling the driver to automatically lock and release the towing pin with a single button press from inside the cab. This key load-bearing component is a component already in the prior art and will not be described in detail here.

[0022] A cavity 8 is formed between the outer surface of the pin 3 and the inner walls of the base assembly 1 and the support assembly 2. The cavity 8 is filled with air, which serves as the supporting medium, enabling non-contact support of the pin 3 relative to the base assembly 1 and the support assembly 2. This reduces wear caused by the relative rotation of the pin 3, base assembly 1, and support assembly 2. Specifically, by filling the cavity 8 with air, the pressure of the air suspends and supports the pin 3, keeping it in a state of minimal direct contact with the base assembly 1 and the support assembly 2. This effectively reduces friction and wear during relative rotation, significantly extending the service life of the base assembly 1, support assembly 2, and pin 3.

[0023] The base assembly 1 is equipped with a sealing component 5, which is used to seal the mating gap between the pin 3, the base assembly 1, and the support assembly 2, ensuring the airtightness of the cavity 8. This sealing component 5 can effectively prevent the air pressure in the cavity 8 from dropping due to air leakage, and avoid direct contact between the pin 3 and the base assembly 1 and the support assembly 2 due to insufficient air pressure, thereby reducing friction and wear among the three and ensuring the reliability of the non-contact support effect.

[0024] The pin 3 is equipped with an inflation component 6, which is used to fill the cavity 8 with external air and maintain the stability of the air pressure inside the cavity 8. By replenishing the gas as needed, the pin 3 is kept as far away from the base assembly 1 and the support assembly 2 as possible, thereby effectively reducing frictional losses during relative rotation and ensuring the long-term stability and service life of the saddle.

[0025] The base assembly 1 is also equipped with a detection assembly 7, which includes a housing 71, a detection head 72, and an elastic sheet 73. The housing 71 is located at the bottom of the base assembly 1 and is connected to the cavity 8 to allow gas from the cavity 8 to flow into the housing 71. The detection head 72 and the elastic sheet 73 are both located inside the housing 71. The elastic sheet 73 divides the housing 71 into a first cavity 74 and a second cavity 75, which are arranged vertically. The detection head 72 is located inside the first cavity 74 and is used to detect the deformation of the elastic sheet 73 to determine the air pressure change and debris accumulation in the cavity 8. It should be noted that the detection head 72 in this embodiment is a Hall effect displacement sensor that detects the distance between itself and the elastic sheet 73. By detecting the distance between the elastic sheets 73, the changes in air pressure and debris inside the cavity 8 are determined. Specifically, a permanent magnet is mounted on the elastic sheet 73, and a Hall element is installed inside the detection head 72. The permanent magnet moves synchronously with the elastic sheet 73. The Hall element is fixedly installed on the top of the first cavity 74 and directly opposite the permanent magnet. When the elastic sheet 73 deforms, the distance between the permanent magnet and the Hall element changes accordingly, causing a change in the magnetic field strength at the location of the Hall element. The Hall element outputs a corresponding Hall voltage based on the change in magnetic field strength. This voltage signal is processed by a conditioning circuit and transmitted to an external receiver. Thus, by detecting the displacement of the elastic sheet 73, the air pressure change and debris accumulation in the cavity 8 are indirectly reflected. This detection method is a non-contact measurement, and debris accumulation on the elastic sheet 73 will not affect the detection accuracy of the sensor, fundamentally avoiding interference from debris in the detection process.

[0026] The elastic sheet 73 has a downwardly concave arc shape, and the detection head 72 is located above the elastic sheet 73 to accurately detect the deformation range of the elastic sheet 73. The elastic sheet 73 is made of beryllium copper, which has extremely high sensitivity to force, mainly due to its excellent comprehensive mechanical properties. Beryllium copper has a moderate elastic modulus and an extremely high elastic limit, which allows it to produce significant and proportional elastic deformation when subjected to small external forces, with minimal elastic hysteresis. During repeated loading and unloading, there is almost no residual deformation, enabling it to accurately and stably reflect every change in force.

[0027] Specifically, air is filled into the cavity 8 by the inflation component 6 to support the pin 3. When the base component 1 and the support component 2 rotate relative to each other, the air flows inside the cavity 8 and into the first cavity 74.

[0028] When the air pressure in cavity 8 is normal and there is no debris or only a small amount of debris, air enters the first cavity 74, and the elastic sheet 73 maintains its normal shape. At this time, the detection head 72 detects that the distance between it and the elastic sheet 73 is within the normal range, and then sends a signal to the external receiver. The user can then know that the saddle is in normal working condition and can use it normally. When the gas pressure in cavity 8 decreases (i.e., air leakage occurs), the gas pressure entering the first cavity 74 decreases. Under the action of the air pressure difference, the gas inside the second cavity 75 will push the elastic sheet 73 to deform upward. The detection head 72 detects that the distance between it and the elastic sheet 73 has shortened, and the smaller the distance between the elastic sheet 73 and the detection head 72, the more serious the air leakage. At this time, the detection head 72 transmits a signal to the external receiver, allowing the user to know that the air pressure inside the cavity 8 has dropped, requiring inflation of the cavity 8 and replacement of the sealing component 5. When the amount of debris in the cavity 8 increases, the debris enters the first cavity 74 and falls onto the elastic sheet 73. Under the influence of gravity, the elastic sheet 73 deforms downwards, causing the detection head 72 to detect an increase in the distance between itself and the elastic sheet 73. As the amount of debris increases, the distance between the detection head 72 and the elastic sheet 73 becomes larger and larger. When the distance between the detection head 72 and the elastic sheet 73 reaches a certain threshold, the detection head 72 sends a signal to the external receiver, allowing the user to know that there is too much debris inside the cavity 8 and that the saddle needs to be checked and replaced promptly.

[0029] like Figures 1 to 5 As shown, the base assembly 1 includes a support base 11 and a connecting sleeve 12. The connecting sleeve 12 is disposed on the top of the support base 11. A chip removal groove 13 is formed on the inner wall of the connecting sleeve 12 to collect waste chips generated during use. A connecting hole 76 is formed between the chip removal groove 13 and the housing 71. The chip removal groove 13 sends air and waste chips into the housing 71 through the connecting hole 76 for detection by the detection component 7. This facilitates real-time monitoring of the air pressure and waste chip accumulation inside the cavity 8, allowing for timely maintenance or replacement when wear is severe or air pressure drops. The support assembly 2 includes a top plate 21 and at least two connecting plates 22. In this embodiment, there are four connecting plates 22. All four connecting plates 22 are vertically disposed at the bottom of the top plate 21 and are arranged in parallel. The gap between every two connecting plates 22 matches the width of the connecting sleeve 12. The connecting sleeve 12 abuts against the connecting plate 22. The connecting plate 22 has a through hole 23. The through hole 23 is coaxially arranged with the connecting sleeve 12. The pin 3 is inserted into the through hole 23 and the connecting sleeve 12 to limit the position of the base assembly 1 and the support assembly 2, realize the hinge of the base assembly 1 and the support assembly 2, and ensure that the support assembly 2 will not separate when it is flipped relative to the base assembly 1.

[0030] like Figure 4 and Figure 7As shown, the pin 3 includes a pin 31 and a baffle 32. The pin 31 and the baffle 32 are fixedly connected to form a T-shaped structure. The outer surface of the pin 31 is threaded, and a nut 4 is threaded onto the outer surface of the pin 31. One end of the nut 4 abuts against the connecting plate 22. Through the cooperation of the pin 3 and the nut 4, the base assembly 1 and the support assembly 2 are installed, and the movement of the support assembly 2 away from the base assembly 1 is restricted, thereby playing a role in axial positioning and load-bearing support, ensuring the stability and reliability of the hinge structure.

[0031] like Figure 4 and Figure 6 As shown, the sealing assembly 5 includes at least two sealing sleeves 51, annular sealing gaskets 52, and annular sealing rings 53. The sealing sleeves 51 are fitted onto the outer surface of the pin 3 to seal the cavity 8. In this embodiment, there are four sealing sleeves 51, four annular sealing gaskets 52, and four annular sealing rings 53. Specifically, the two sealing sleeves 51 are respectively fitted onto both ends of the outer surface of the pin 3, and the two sealing sleeves 51 abut against the baffle 32 and the nut 4, respectively. When the pin 3 is assembled in place, the two sealing sleeves 51 form an effective seal on the cavity 8, making the cavity 8 a sealed space, sealing the air inside the cavity 8, preventing gas leakage, and ensuring the stability of the non-contact support effect.

[0032] like Figure 4 and Figure 6 As shown, the connecting plate 22 has an annular sealing groove 54 at one end near the connecting sleeve 12. An annular sealing gasket 52 and an annular sealing ring 53 are both located inside the annular sealing groove 54 to seal the gap between the base assembly 1 and the support assembly 2. The sealing sleeve 51, annular sealing gasket 52, and annular sealing ring 53 are all made of hydrogenated nitrile rubber. This material has advantages such as high temperature resistance, oil resistance, aging resistance, high strength, and long service life, providing excellent sealing performance and meeting the stringent operating conditions of the tractor saddle during long-term operation. The aperture of the annular sealing groove 54 is matched to the dimensions of the annular sealing gasket 52 and the annular sealing ring 53. During installation, the annular sealing ring 53 is first installed inside the annular sealing groove 54, and then the annular sealing gasket 52 is installed inside the annular sealing groove 54. The annular sealing ring 53 supports the annular sealing gasket 52, making the end face of the annular sealing groove 54 slightly higher than the end face of the connecting plate 22. When the connecting sleeve 12 is inserted between the two connecting plates 22, the annular sealing gasket 52 abuts against the connecting sleeve 12, thereby sealing the contact surface between the connecting sleeve 12 and the connecting plate 22.

[0033] like Figure 7As shown, the inflation assembly 6 includes an air pump 61 and a one-way valve 62. The air pump 61 is located at the end of the pin 3. The pin 3 has an inlet hole 63, one end of which is connected to the output end of the air pump 61, and the other end of which is connected to the cavity 8. Air is drawn into the inlet hole 63 by the air pump 61 and then delivered into the cavity 8 through the inlet hole 63, using the air to provide non-contact support for the pin 3. The inlet hole 63 includes a first air inlet hole 631 and multiple second air inlets 632. The first air inlet hole 631 and the multiple second air inlets 632 are all located inside the pin 3. One end of the first air inlet hole 631 is connected to the output end of the air pump 61, and the other end of the first air inlet hole 631 is connected to one end of the multiple second air inlets 632. The other ends of multiple second air inlets 632 are equidistantly distributed on the circumferential surface of the pin 3, allowing air to be evenly filled into the cavity 8, ensuring balanced circumferential force on the pin 3, and improving the stability of the non-contact support. A one-way valve 62 is located inside the first air inlet 631 to allow air to flow unidirectionally into the cavity 8, preventing air and debris from flowing back into the air pump 61. This avoids backflow contamination or pressure backflow affecting the normal operation of the air pump 61, ensuring the long-term reliable operation of the inflation assembly 6.

[0034] Working principle: When the saddle needs to be installed, first invert the top plate 21 and install the annular sealing ring 53 and the annular sealing gasket 52 into the annular sealing groove 54 in sequence. After installation, put the two sealing sleeves 51 on the pin 3, so that the two sealing sleeves 51 are located at both ends of the outer surface of the pin 3. Then, insert the support assembly 2 between the two connecting plates 22, so that the connecting sleeve 12 is coaxially set with the through hole 23 of the connecting plate 22. At this time, insert the pin 3 into the through hole 23 and the connecting sleeve 12. After the baffle 32 abuts against the connecting plate 22, screw the nut 4 onto the pin 3 and tighten it, so that the nut 4 abuts against the connecting plate 22, completing the installation and fixing of the pin 3.

[0035] Start the air pump 61. The air pump 61 draws air into the first air inlet 631. The air will pass through the one-way valve 62 and enter the cavity 8 and the first cavity 74 through the second air inlet 632. After inflation is complete, turn off the air pump 61 and the tractor saddle can be used.

[0036] During use, air flows in cavity 8 and first cavity 74. When waste is generated, the waste will enter the chip discharge groove 13 with the air flow, and then enter the first cavity 74 through the connection hole 76 and fall on the elastic sheet 73.

[0037] When the air pressure inside cavity 8 is normal and there are no debris or only a small amount of debris on the elastic sheet 73, the elastic sheet 73 will swing within the normal range. When the detection head 72 detects that the distance between it and the elastic sheet 73 is within the normal range, it transmits a signal to the external receiver, and the user can then know that the situation inside cavity 8 is normal and can continue to use it. When the air pressure inside cavity 8 decreases and there are no or only a small amount of debris, the air pressure of the gas entering the first cavity 74 decreases. At this time, the gas inside the second cavity 75 pushes the elastic sheet 73 upward under the action of the air pressure difference, reducing the distance between the elastic sheet 73 and the detection head 72. The smaller the distance between the elastic sheet 73 and the detection head 72, the more serious the air leakage. When the detection head 72 detects a shortening of the distance between itself and the elastic plate 73, it transmits a signal to an external receiver, allowing the user to know that there is an internal air leak and that inflation and replacement of the sealing assembly 5 are necessary. When the amount of debris in the cavity 8 increases, the debris enters the first cavity 74 through the debris discharge groove 13 and falls onto the elastic plate 73, causing the elastic plate 73 to deform downwards under the gravity of the debris, resulting in an increase in the distance between the detection head 72 and the elastic plate 73. As the amount of debris increases, the distance between the detection head 72 and the elastic plate 73 increases. When the distance between the detection head 72 and the elastic plate 73 reaches a certain threshold, the detection head 72 sends a signal to the external receiver, allowing the user to know that there is too much debris inside the cavity 8 and that the saddle needs to be checked and replaced promptly.

[0038] Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A saddle for an electric tractor, characterized in that, include: Two base components (1); The support assembly (2) is rotatably mounted on the base assembly (1); Two pins (3) are inserted at the joint between the base assembly (1) and the support assembly (2) to hinge the base assembly (1) and the support assembly (2). A cavity (8) is formed between the outer surface of the pin (3) and the inner wall of the base assembly (1) and the inner wall of the support assembly (2). The cavity (8) is used to fill air. Air is used as the support medium to achieve non-contact support of the pin (3) relative to the base assembly (1) and the support assembly (2), thereby reducing wear caused by relative rotation. A sealing component (5) is disposed on the base assembly (1) to seal the mating gap between the pin (3), the base assembly (1) and the support assembly (2) to ensure the airtightness of the cavity (8); An inflation assembly (6) is provided on the pin (3) for filling the cavity (8) with external air and maintaining the air pressure inside the cavity (8) stable. The detection component (7) includes a housing (71), a detection head (72), and an elastic sheet (73). The housing (71) is disposed at the bottom of the base assembly (1) and is connected to the cavity (8). The detection head (72) and the elastic sheet (73) are both disposed inside the housing (71). The elastic sheet (73) divides the housing (71) into a first cavity (74) and a second cavity (75). The detection head (72) is located inside the first cavity (74) and is used to detect the deformation of the elastic sheet (73) to determine the air pressure change and waste accumulation in the cavity (8).

2. The electric tractor saddle according to claim 1, characterized in that: The elastic sheet (73) is in the shape of a downwardly concave arc, and the detection head (72) is located above the elastic sheet (73) for accurately detecting the deformation range of the elastic sheet (73).

3. The electric tractor saddle according to claim 1, characterized in that: The base assembly (1) includes a support base (11) and a connecting sleeve (12). The connecting sleeve (12) is located on the top of the support base (11). The inner wall of the connecting sleeve (12) is provided with a chip removal groove (13) for collecting waste chips generated during use. A connecting hole (76) is provided between the chip removal groove (13) and the housing (71). The chip removal groove (13) sends air and waste chips into the housing (71) through the connecting hole (76) for detection by the detection assembly (7).

4. The electric tractor saddle according to claim 3, characterized in that: The support assembly (2) includes a top plate (21) and at least two connecting plates (22). The connecting plates (22) are vertically disposed at the bottom of the top plate (21). The connecting sleeve (12) abuts against the connecting plate (22). A through hole (23) is provided on the connecting plate (22). The through hole (23) is coaxially disposed with the connecting sleeve (12). The pin (3) is inserted into the through hole (23) and the connecting sleeve (12) to realize the hinge connection between the base assembly (1) and the support assembly (2).

5. The electric tractor saddle according to claim 4, characterized in that: The pin (3) includes a rod (31) and a baffle (32). The rod (31) is fixedly connected to the baffle (32). A nut (4) is threaded onto the outer surface of the rod (31). One end of the nut (4) abuts against the connecting plate (22). The base assembly (1) and the support assembly (2) are installed by the cooperation of the pin (3) and the nut (4).

6. The electric tractor saddle according to claim 4, characterized in that: The sealing assembly (5) includes at least two sealing sleeves (51), annular sealing gaskets (52) and annular sealing rings (53). The sealing sleeves (51) are fitted onto the outer surface of the pin (3) to seal the cavity (8). The sealing sleeves (51), annular sealing gaskets (52) and annular sealing rings (53) are all made of hydrogenated nitrile rubber.

7. The electric tractor saddle according to claim 6, characterized in that: The connecting plate (22) has an annular sealing groove (54) at one end near the connecting sleeve (12). The annular sealing gasket (52) and the annular sealing ring (53) are both located inside the annular sealing groove (54) to seal the gap between the base assembly (1) and the support assembly (2).

8. The electric tractor saddle according to claim 1, characterized in that: The inflation assembly (6) includes an air pump (61) and a one-way valve (62). The air pump (61) is located at the end of the pin (3). The pin (3) has an inlet hole (63). One end of the inlet hole (63) is connected to the output end of the air pump (61), and the other end of the inlet hole (63) is connected to the cavity (8).

9. The electric tractor saddle according to claim 8, characterized in that: The inlet (63) includes a first air inlet (631) and a plurality of second air inlets (632). The first air inlet (631) and the plurality of second air inlets (632) are both opened inside the pin (3). One end of the first air inlet (631) is connected to the output end of the air pump (61), and the other end of the first air inlet (631) is connected to one end of the plurality of second air inlets (632). The other ends of the plurality of second air inlets (632) are evenly distributed on the circumferential surface of the pin (3) so that air is evenly filled into the cavity (8).

10. An electric tractor saddle according to claim 9, characterized in that: The one-way valve (62) is located inside the first air inlet (631) and is used to allow air to flow into the cavity (8) in one direction.

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