A skid steer loader

Abstract

This application provides a skid steer loader, belonging to the field of loader technology, specifically a skid steer loader including a loader body; a boom support frame including a first boom support frame and a second boom support frame, respectively disposed on both sides of the loader body; a boom including a first boom and a second boom, the first boom being rotatably connected to a first boom support frame, the second boom being rotatably connected to a second boom support frame, and a rigid boom stabilizer bar disposed between the first boom and the second boom; and a boom stabilization system disposed between the boom and the boom support frame, the boom stabilization system enabling the boom to tend to move closer to the interior of the loader body relative to the boom support frame. The above-mentioned skid steer loader, through the linkage of the first and second booms and the boom stabilization system that causes the boom to tend to move closer to the interior of the loader body relative to the boom support frame, comprehensively improves and solves the Y-axis impact and stability issues generated by the boom during the lifting process of the skid steer loader.

Description

Technical Field

[0001] This application relates to the field of skid steer loader technology, and specifically to a skid steer loader. Background Technology

[0002] Currently, during actual operation, skid steer loaders generate work-related excitations and vibrations that are transmitted to the cab through the working device, boom, and chassis structure. Excessive impact and vibration can lead to decreased operator comfort, reduced vehicle stability, and other issues. Furthermore, because skid steer loaders require the boom and working device to be raised to a specific height for loading and unloading, this high-lift, high-center-of-gravity working posture causes lateral displacement or swaying of the boom structure due to vibrations and impacts, further exacerbating overall machine swaying and stability problems.

[0003] To improve and address the impact and stability issues during the boom lifting process of skid steer loaders, most improvements focus on solutions related to the boom drive force, i.e., the hydraulic system and hydraulic control system, with an emphasis on improving the smoothness of operation during boom lifting. While these measures do offer some mitigation and stability improvement in the boom's lifting and lowering directions, the boom of construction machinery such as skid steer loaders is subjected to excitations in the X, Y, and Z directions during operation and travel. Some measures can effectively reduce impacts and sway in the X-direction or vertical Z-direction, but have little effect on lateral Y-direction vibrations and impacts.

[0004] In summary, existing technological improvements cannot effectively address the issues of excessive lateral excitation and impact vibration experienced by the boom during operation, nor can they improve the overall vehicle stability caused by excessive lateral excitation of the boom. Summary of the Invention

[0005] In view of this, this application provides a skid steer loader that, through the linkage of the first boom and the second boom, and a boom stabilization system that causes the boom to tend to move closer to the interior of the loader body relative to the boom support frame, improves and solves the Y-axis impact and stability of the skid steer loader boom during the lifting process.

[0006] To achieve the above objectives, this application provides the following technical solution:

[0007] A skid steer loader, comprising:

[0008] Loader body;

[0009] The boom support frame includes a first boom support frame and a second boom support frame, which are respectively disposed on both sides of the loader body;

[0010] The boom includes a first boom and a second boom, the first boom being rotatably connected to a first boom support frame, the second boom being rotatably connected to a second boom support frame, and a rigid boom lateral stabilizer bar being provided between the first boom and the second boom;

[0011] A boom stabilization system is installed between the boom and the boom support frame, which enables the boom to tend to move closer to the interior of the loader body relative to the boom support frame.

[0012] Optionally, the boom and the boom support frame are rotatably connected by a pin, wherein:

[0013] The boom includes an inner structural wing plate and an outer structural wing plate arranged in parallel.

[0014] The boom support frame includes an inner support plate and an outer support plate arranged in parallel.

[0015] The outer support plate, the outer structural wing plate, the inner structural wing plate, and the inner support plate are sequentially mounted on the pin. The inner structural wing plate and the outer structural wing plate are fixedly connected by a boom pin cylindrical sleeve sleeved on the pin. The inner structural wing plate, the outer structural wing plate, and the boom pin cylindrical sleeve can rotate relative to the inner support plate and the outer support plate.

[0016] The boom stabilization system includes an electromagnetic coil sleeved on the boom pin cylinder between the inner structural wing plate and the outer structural wing plate. When the electromagnetic coil is energized, it generates an electromagnetic field and causes the boom to tend to move closer to the inner support plate.

[0017] Optionally, the boom pin cylindrical sleeve is magnetically conductive.

[0018] Optionally, the area of ​​the inner support plate within the electromagnetic field of the electromagnetic coil is greater than the area of ​​the outer support plate within the electromagnetic field of the electromagnetic coil.

[0019] Optionally, the outer support plate is provided with a magnetic blocking coating on the side facing the inner support plate, and the magnetic blocking coating can reduce the electromagnetic attraction force of the electromagnetic coil on the outer support plate.

[0020] Optionally, the boom stabilization system further includes an elastic washer fitted on the pin between the inner support plate and the inner structural wing plate. When the inner structural wing plate approaches the inner support plate, the elastic washer is compressed and can generate a tendency to move the boom away from the inner support plate.

[0021] Optionally, a control system is also included, wherein the electromagnetic coil disposed on the first boom and the electromagnetic coil disposed on the second boom are respectively independently electrically connected to the control system.

[0022] Optionally, the first boom and / or the second boom are provided with a rotation position sensor and a displacement sensor. The rotation position sensor can measure the rotation position and lifting height of the boom, and the displacement sensor can measure the distance between the inner structural wing plate and the inner support plate. The signals of the rotation position sensor and the displacement sensor are both connected to the control system.

[0023] Optionally, the control system can control the magnitude of the electromagnetic attraction force exerted by the electromagnetic coil on the outer support plate and the inner support plate based on the signals fed back by the angular position sensor and / or the displacement sensor.

[0024] Optionally, the boom stabilization system has manual and automatic on / off functions.

[0025] The skid steer loader provided in this application improves and solves the Y-axis impact and stability of the skid steer loader's boom during the lifting process by means of the linkage between the first boom and the second boom, and a boom stabilization system that causes the boom to tend to move closer to the interior of the loader body relative to the boom support frame. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the skid steer loader of this application;

[0028] Figure 2 This is a schematic diagram of the boom stabilization system and boom structure layout of this application. Figure 1 ;

[0029] Figure 3 This is a schematic diagram of the boom stabilization system and boom structure layout of this application. Figure 2 ;

[0030] Figure 4 This is a schematic diagram of the sensor arrangement of the boom stabilization system of this application;

[0031] Figure 5 This is a schematic diagram of the boom stabilization system on a single-sided boom structure;

[0032] Figure 6 for Figure 5 Component diagram;

[0033] Figure 7 This is a schematic diagram of the control logic of the boom stabilization system of this application.

[0034] exist Figures 1-7 middle:

[0035] 1. Loader body; 2. Boom; 3. Boom support frame; 4. Boom stabilization system; 40. Inner support plate; 41. Outer support plate; 42. Elastic washer; 43. Electromagnetic coil; 44. Boom pin bushing; 45. Boom pin bushing; 46. Inner structural wing plate; 47. Outer structural wing plate; 48. Pin; 49. Pin support; 410. Angle position sensor; 411. Displacement sensor; 412. Sensor sensing ring; 5. Boom lateral stabilizer bar. Detailed Implementation

[0036] This application provides a skid steer loader that, through the linkage of a first boom and a second boom, and a boom stabilization system that causes the boom to tend to move closer to the interior of the loader body relative to the boom support frame, improves and solves the Y-axis impact and stability of the skid steer loader's boom during the lifting process.

[0037] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0038] like Figures 1-3 As shown, this application provides a skid steer loader, including:

[0039] Loader body 1; such as Figure 1 As shown, the running direction of the loader body 1, that is, the direction of the front and rear of the vehicle is the X direction, the direction from the left to the right of the loader body 1 is the Y direction, and the vertical direction from the top to the bottom of the vehicle is the Z direction.

[0040] The boom support frame 3 includes a first boom support frame and a second boom support frame, which are respectively installed on both sides of the loader body 1;

[0041] Boom 2, including the first boom (i.e. Figure 3 The left boom) and the second boom (i.e. Figure 3The boom on the right side is rotatably connected to the first boom support frame and the second boom is rotatably connected to the second boom support frame. A rigid boom lateral stabilizer bar 5 is provided between the first boom and the second boom. The displacement of the relatively independent movement of the first boom and the second boom is locked by the boom lateral stabilizer bar 5 to achieve a linkage lock lateral (Y-direction) displacement of the first boom and the second boom.

[0042] The boom stabilization system 4 is provided between the boom 2 and the boom support frame 3, which are rotatably connected. Specifically, it is provided between the first boom and the first boom support frame, and between the second boom and the second boom support frame. The boom stabilization system 4 can cause the boom 2 to tend to move closer to the interior of the loader body 1 relative to the boom support frame 3. For example, an electromagnetic stabilization system can be provided between the boom 2 and the boom support frame 3. When the electromagnetic stabilization system is energized, the boom 2 will tend to move closer to the interior of the loader body 1 relative to the boom support frame 3.

[0043] The linkage between the first and second booms, along with the boom stabilization system 4 which causes the boom 2 to tend to move closer to the interior of the loader body 1 relative to the boom support frame 3, comprehensively improve and resolve the Y-axis impact and stability issues generated by the boom 2 of the skid steer loader during the lifting process.

[0044] In a preferred embodiment, such as Figure 5 and Figure 6 As shown, boom 2 and boom support frame 3 are rotatably connected by pin 48, wherein:

[0045] The boom 2 includes an inner structural wing plate 46 and an outer structural wing plate 47 arranged in parallel.

[0046] The boom support frame 3 includes an inner support plate 40 and an outer support plate 41 arranged in parallel.

[0047] The outer support plate 41, outer structural wing plate 47, inner structural wing plate 46, and inner support plate 40 are sequentially mounted on the pin 48. The inner structural wing plate 46 and outer structural wing plate 47 are relatively fixedly connected by the boom pin bushing 45 and boom pin cylindrical sleeve 44, which are sleeved on the pin 48. When the inner structural wing plate 46 and outer structural wing plate 47 rotate relative to the inner support plate 40 and outer support plate 41, the boom pin bushing 45 and boom pin cylindrical sleeve 44 rotate relative to the pin 48. A grease channel is provided between the boom pin bushing 45 and the pin 48 to reduce wear and friction during rotation. One end of the pin 48 is located in the pin support 49 of the inner support plate 40, and the other end passes through the outer support plate 41 and is connected to a limiting plate.

[0048] The boom stabilization system 4 includes an electromagnetic coil 43 mounted on a pin 48 between the inner structural wing plate 46 and the outer structural wing plate 47. When the electromagnetic coil 43 is energized, it generates an electromagnetic field and causes the boom 2 to tend to move closer to the inner support plate 40.

[0049] The electromagnetic force generated by the energized electromagnetic coils 43 at the pin 48 structure of the first and second booms causes the boom head structures of the first and second booms (the clamping areas of the inner structural wing plate 46 and the outer structural wing plate 47) to be pulled towards the inside of the loader body 1, thereby improving and solving the Y-direction impact and stability generated by the boom 2 of the skid steer loader during the lifting process.

[0050] The electromagnetic boom stabilization system 4 has the advantages of compact structure, durability and energy saving.

[0051] In a preferred embodiment, such as Figure 6 As shown, a magnetic boom pin cylinder 44 is sleeved on the pin 48 between the inner structural wing plate 46 and the outer structural wing plate 47, and an electromagnetic coil 43 is wound around the boom pin cylinder 44.

[0052] The boom pin cylinder 44, made of a material with good magnetic permeability, can effectively absorb and conduct magnetic fields, thereby increasing the magnetic flux and attraction force of the electromagnetic coil 43.

[0053] The electromagnetic coil 43 can be arranged with 700-1500 turns of 1mm copper wire, which is wound around the boom pin cylindrical sleeve 44. In a preferred embodiment, the boom pin cylindrical sleeve 44 has the following dimensions: a radial outer diameter of 100mm and an axial length, which is also the width of the wound portion of the electromagnetic coil 43, of 100mm. One layer of copper wire is wound with 100 turns, and 7-10 layers of radially tight winding can achieve a coil of 700-1500 turns.

[0054] The electromagnetic attraction force between the electromagnetic coil 43 and the inner support plate 40 is closely related to the input current of the electromagnetic coil 43. The greater the current, the greater the electromagnetic force generated. Adjusting the current can make the electromagnetic force reach and maintain a level of over 800N.

[0055] The magnitude of the electromagnetic attraction force can be approximated using the formula for calculating the magnitude of electromagnetic force (ignoring factors such as leakage magnetic field and hysteresis).

[0056]

[0057] Where F is the magnitude of the electromagnetic pulling force on the boom structure after the electromagnetic coil 43 is energized, μ0 is the vacuum permeability, N is the number of coil turns, I is the excitation current of the electromagnetic coil 43, A represents the area of ​​the outer circular surface of the coil projection of the electromagnetic coil 43 on the inner structural wing plate 46, C0 is the air gap distance between the inner structural wing plate 46 and the inner support plate 40, and y is the sliding displacement between the inner structural wing plate 46 and the inner support plate (positive for approaching, negative for moving away).

[0058] In a preferred embodiment, the area of ​​the inner support plate 40 within the electromagnetic field of the electromagnetic coil 43 is greater than the area of ​​the outer support plate 41 within the electromagnetic field of the electromagnetic coil 43.

[0059] In this embodiment, the area of ​​the inner support plate 40 of the boom support frame 3 within the electromagnetic field of the electromagnetic coil 43 is set to be significantly larger than the area of ​​the outer support plate 41 within the electromagnetic field of the electromagnetic coil 43. This makes the resultant force of the tension of the inner support plate 40 and the outer support plate 41 on the electromagnetic coil 43 and the covered boom pin cylinder 44 inward (i.e., towards the inside of the loader body 1).

[0060] Furthermore, in a preferred embodiment, the outer support plate 41 is provided with a magnetic blocking coating on the side facing the inner support plate 40, and the magnetic blocking coating can reduce the electromagnetic attraction force of the electromagnetic coil 43 on the outer support plate 41.

[0061] The magnetic shielding coating can reduce the electromagnetic attraction force of the electromagnetic coil 43 on the outer support plate 41, so that a smaller current can be applied to the electromagnetic coil 43 to make the resultant force of the tension force of the inner support plate 40 and the outer support plate 41 on the electromagnetic coil 43 and the covered boom pin cylindrical sleeve 44 meet the requirements.

[0062] In a preferred embodiment, such as Figure 5 and Figure 6 As shown, the boom stabilization system 4 also includes an elastic washer 42 fitted on the pin 48 between the inner support plate 40 and the inner structural wing plate 46. When the inner structural wing plate 46 approaches the inner support plate 40, the elastic washer 42 is compressed and can generate a tendency to move the boom 2 away from the inner support plate 40.

[0063] To provide passive support and damping for lateral vibration displacement of the boom 2, an elastic washer 42 is fitted onto the boom pin bushing 45 mounted on the inner structural wing plate 46 of each boom 2. When the boom 2 approaches the interior of the loader body 1, that is, when the inner structural wing plate 46 of the boom 2 tends to approach the inner support plate 40 of the boom support frame 3, the elastic washer 42 is compressed, generating an elastic reaction force that pushes the boom 2 outward. This outward elastic reaction force and the inward attraction force of the electromagnetic coil 43 act together on the boom 2 (the clamping area between the inner structural wing plate 46 and the outer structural wing plate 47), so that the axial movement displacement of the boom 2 along the pin 48 towards the inward or outward side can be suppressed and controlled.

[0064] In a preferred embodiment, a control system is also included, wherein the electromagnetic coil 43 disposed on the first boom and the electromagnetic coil 43 disposed on the second boom are respectively independently electrically connected to the control system.

[0065] The electromagnetic force generated by the energized electromagnetic coils 43 at the first and second booms causes the rotating connection points of the first and second booms with the boom support frame 3 (the clamping areas of the inner structural wing plate 46 and the outer structural wing plate 47) to be pulled inward toward the inside of the loader body 1. In order to better control the axial position of the first and second booms relative to the boom support frame 3, the electromagnetic coils 43 on the first and second booms can be independently controlled to allow only one side of the boom 2 to move along the axis of the pin 48 due to electromagnetic attraction (the electromagnetic pull on the first boom, i.e. the left boom 2, is to the right, and the electromagnetic pull on the second boom, i.e. the right boom 2, is to the left, and the directions are opposite).

[0066] For example, when it is necessary to move the boom 2 as a whole along the axial direction of the pin 48 to the right, the electromagnetic coil 43 on the first boom can be turned on and the electromagnetic coil 43 on the second boom can be turned off; or the electromagnetic coils 43 on the first boom and the second boom can be turned on simultaneously according to the axial position of the first boom and the second boom relative to the boom support frame 3.

[0067] In a preferred embodiment, such as Figure 4 As shown, the first boom and / or the second boom are equipped with a angular position sensor 410 and a displacement sensor 411, as well as a corresponding sensor sensing ring 412. The angular position sensor 410 can measure the angular position and lifting height of the corresponding boom 2, and the displacement sensor 411 can measure the distance between the inner structural wing plate 46 and the inner support plate 40. The signals of the angular position sensor 410 and the displacement sensor 411 are both connected to the control system.

[0068] To better detect the rotation angle of the boom 2 relative to the boom support frame 3, and the displacement of the boom 2 relative to the boom support frame 3 in the axial direction (Y direction) of the pin 48, a rotation angle position sensor 410 and a displacement sensor 411, as well as a corresponding sensor sensing ring 412, are provided on the first boom and / or the second boom. In this way, the control system can control the lifting action of the boom 2 and the magnitude of the energizing current of the electromagnetic coil 43 based on the detected real-time angle signal or displacement signal.

[0069] Specifically, the corner position sensor 410 and the displacement sensor 411 can be set on the surfaces of the inner structural wing plate 46 and the outer structural wing plate 47 of the boom 2, or near the inner structural wing plate 46, while the sensor sensing surface ring 412 can be set on the surfaces of the inner support plate 40 and the inner structural wing plate 46.

[0070] In a preferred embodiment, such as Figure 7 The control logic flowchart of the boom stabilization system 4 shown indicates that the control system can control the magnitude of the electromagnetic attraction force exerted by the electromagnetic coil 43 on the outer support plate 41 and the inner support plate 40 based on the signals fed back by the angle position sensor 410 and / or the displacement sensor 411.

[0071] The rotation angle and position sensors of boom 2 can obtain the attitude position of boom 2 in the height direction, thus providing a basis for the control quantity of the adaptive electromagnetic force required by the electromagnetic force constraint system. In addition, the real-time displacement of boom 2 provided by boom lateral displacement sensor 411 can actively adjust and control the magnitude of the electromagnetic force on the structure at the rotating shaft end of boom 2, so as to achieve precise control and suppression of the lateral swaying displacement of boom 2.

[0072] The adjustable and real-time control of the boom's lateral displacement effectively enhances the constraint and control of the boom's lateral swing and vibration, greatly improving the stability of the boom and the entire skid steer loader.

[0073] In a preferred embodiment, the boom stabilization system 4 has manual and automatic on / off functions.

[0074] The boom stabilization system 4 has manual and automatic on / off functions. That is, the function of controlling the Y-direction displacement of the boom 2 based on the signals of the angle position sensor 410 and the displacement sensor 411 can be manually turned on and off on the control screen connected to the control system. Alternatively, the control system can automatically turn on and off based on the signals of the angle position sensor 410 and the displacement sensor 411. When turned on, the boom 2 can work within the full range of the lifting angle without affecting the existing normal working capacity of the boom 2.

[0075] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0076] The block diagrams of devices, apparatuses, devices, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the word “or” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

[0077] It should also be noted that in the apparatus, equipment, and methods of this application, the components or steps can be disassembled or recombined. These disassemblies or recombinations should be considered as equivalent solutions of this application.

[0078] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use this application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of this application. Therefore, this application is not intended to be limited to the aspects shown herein, but rather to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0079] It should be understood that the qualifiers “first,” “second,” “third,” “fourth,” “fifth,” and “sixth” used in the description of the embodiments of this application are only used to more clearly illustrate the technical solutions and are not intended to limit the scope of protection of this application.

[0080] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A skid steer loader, characterized in that, include: Loader body; The boom support frame includes a first boom support frame and a second boom support frame, which are respectively disposed on both sides of the loader body; The boom includes a first boom and a second boom, the first boom being rotatably connected to a first boom support frame, the second boom being rotatably connected to a second boom support frame, and a rigid boom lateral stabilizer bar being provided between the first boom and the second boom; A boom stabilization system is installed between the boom and the boom support frame, and the boom stabilization system enables the boom to tend to move closer to the interior of the loader body relative to the boom support frame; The boom and the boom support frame are rotatably connected by a pin, wherein: The boom includes an inner structural wing plate and an outer structural wing plate arranged in parallel; the boom support frame passes through the pin shaft, the outer structural wing plate and the inner structural wing plate pass through the pin shaft and are arranged between the boom support frame, the inner structural wing plate and the outer structural wing plate are fixedly connected by a boom pin shaft cylindrical sleeve sleeved on the pin shaft, and the inner structural wing plate, the outer structural wing plate and the boom pin shaft cylindrical sleeve can rotate relative to the boom support frame; The boom stabilization system includes an electromagnetic coil sleeved on the boom pin cylinder between the inner structural wing plate and the outer structural wing plate. When the electromagnetic coil is energized, it generates an electromagnetic field and causes the boom to tend to move closer to the boom support frame and closer to the loader body.

2. The skid steer loader according to claim 1, characterized in that, The boom support frame includes an inner support plate and an outer support plate arranged in parallel. The outer support plate, the outer structural wing plate, the inner structural wing plate, and the inner support plate are sequentially mounted on the pin. The inner structural wing plate and the outer structural wing plate are fixedly connected by a boom pin cylindrical sleeve sleeved on the pin. The inner structural wing plate, the outer structural wing plate, and the boom pin cylindrical sleeve can rotate relative to the inner support plate and the outer support plate. When the electromagnetic coil is energized, it generates an electromagnetic field and causes the boom to tend to move closer to the inner support plate.

3. The skid steer loader according to claim 2, characterized in that, The boom pin cylindrical sleeve is magnetically conductive.

4. The skid steer loader according to claim 2, characterized in that, The area of ​​the inner support plate within the electromagnetic field of the electromagnetic coil is greater than the area of ​​the outer support plate within the electromagnetic field of the electromagnetic coil.

5. The skid steer loader according to claim 4, characterized in that, The outer support plate is provided with a magnetic blocking coating on the side facing the inner support plate, and the magnetic blocking coating can reduce the electromagnetic attraction force of the electromagnetic coil on the outer support plate.

6. The skid steer loader according to claim 2, characterized in that, The boom stabilization system also includes an elastic washer fitted on the pin between the inner support plate and the inner structural wing plate. When the inner structural wing plate approaches the inner support plate, the elastic washer is compressed and can generate a tendency to move the boom away from the inner support plate.

7. The skid steer loader according to claim 2, characterized in that, It also includes a control system, wherein the electromagnetic coil disposed on the first boom and the electromagnetic coil disposed on the second boom are respectively independently electrically connected to the control system.

8. The skid steer loader according to claim 7, characterized in that, The first boom and / or the second boom are equipped with a rotation position sensor and a displacement sensor. The rotation position sensor can measure the rotation position and lifting height of the boom, and the displacement sensor can measure the distance between the inner structural wing plate and the inner support plate. The signals of the rotation position sensor and the displacement sensor are both connected to the control system.

9. The skid steer loader according to claim 8, characterized in that, The control system can control the magnitude of the electromagnetic attraction force exerted by the electromagnetic coil on the outer support plate and the inner support plate based on the signals fed back by the angular position sensor and / or the displacement sensor.

10. The skid steer loader according to claim 2, characterized in that, The boom stabilization system has manual and automatic on / off functions.

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