Seat lifting structure

Abstract

The utility model discloses a seat lifting structure, including felling car, the driver's cabin of felling car is equipped with seat, the seat is installed in the driver's cabin through bottom plate, two lifting cross bars are symmetrically equipped on the bottom plate, every lifting cross bar is formed by the hinging of two connecting rods, and a plurality of connecting cross bars are equipped between two lifting cross bars, the bottom plate is equipped with lifting mechanism, two lifting cross bars top are jointly connected with the pitching mechanism, and the seat is installed at the top of pitching mechanism, the utility model discloses through increasing a connecting rod on X -shaped lifting cross bar, is used for replacing the rolling pair structure of roller and sliding slot, and the pitching mechanism is integrated with lifting mechanism, and through practice proves, the close cooperation assembly of each joint rotary mounting hole site precision machining can be achieved, and then makes the seat more firm, and the shaking greatly reduces, and the smaller the clearance is, and the less easy wear and tear is, and the riding comfort is good, and the life is longer.

Description

Technical Field

[0001] This utility model relates to the field of forestry equipment technology, and in particular to a seat lifting structure. Background Technology

[0002] In forestry logging operations, the logging vehicle serves as core equipment, undertaking complex and harsh operational tasks. Its operating environment includes steep slopes and rugged forest terrain, and it faces diverse operational needs during operations, such as regular movement while moving forward and operating the telescopic boom for logging operations. The logging vehicle has an engine compartment at the front, a driver's cab in the middle, and a telescopic boom at the rear. During operations, the driver needs to flexibly adjust the seat position according to different working conditions: when working on steep slopes, the seat cushion needs to be adjusted to a larger reclining angle to ensure safety and comfort; the seat orientation also needs to be switched to adapt to operational needs during forward movement and boom operation.

[0003] However, existing seat lifting and tilt adjustment mechanisms have significant shortcomings when facing the complex operating conditions of forestry logging vehicles. Their robustness and stability cannot meet actual needs, and the seat is prone to excessive shaking during operation. This not only seriously affects the driver's riding experience, but also significantly shortens the service life of the seat and related structures due to frequent vibrations and uneven stress.

[0004] To address this issue, a seat lifting structure is proposed to solve the problems existing in the current technology. Utility Model Content

[0005] The purpose of this utility model is to address the aforementioned problems by providing a seat lifting structure. This utility model adds a connecting rod at the top and bottom of the X-shaped lifting crossbar to replace the rolling pair structure of rollers and slides, and integrates the pitching mechanism with the lifting mechanism. Practical experience has shown that precision machining of the rotating mounting holes of each joint allows for a tight fit and assembly, resulting in a more robust seat, significantly reduced wobbling, smaller gaps, less wear, better seating comfort, and a longer lifespan. To achieve the above-mentioned utility model objectives, the technical solution adopted is as follows: According to one aspect of the present invention, a seat lifting structure is provided, including a logging vehicle. The logging vehicle has a seat in its cab, which is mounted on the cab via a base plate. Two lifting crossbars are symmetrically arranged on the base plate. Each lifting crossbar is formed by two connecting rods hinged in the middle, and multiple connecting crossbars are provided between the two lifting crossbars. A lifting mechanism is provided in the base plate, and a pitching mechanism is connected to the top of the two lifting crossbars. The seat is mounted on the top of the pitching mechanism.

[0006] Preferably, the lifting mechanism includes two lower mounting seats symmetrically arranged on the rear end of the base plate, and a fixed seat is provided at the front end of the base plate. The lower end of each lifting cross rod is connected to the corresponding lower mounting seat, and the lifting cross rod is connected to the fixed seat through a lower connector. The lower end of the pitch mechanism is provided with two upper mounting seats. The upper part of one end of each lifting cross rod is connected to the corresponding upper mounting seat, and the other end is connected to the pitch mechanism through an upper connector. Two connecting plates are symmetrically arranged between the two lifting cross rods, and an airbag is connected between the two connecting plates. That is, the output end and bottom of the airbag are respectively connected to the corresponding connecting plates.

[0007] Preferably, the pitch mechanism includes a pitch bracket installed at the bottom of the seat. Two upper mounting seats are symmetrically provided at the rear end of the bottom of the pitch bracket. Two fixed circular plates are symmetrically provided on the left and right sides of the pitch bracket. Two angle adjusters are symmetrically provided inside the two crossbars on the left and right sides of the pitch bracket. Each angle adjuster is coaxially arranged with the corresponding fixed circular plate. The two angle adjusters are connected by a spline shaft. Each fixed circular plate is provided with a knob handle. Each angle adjuster is provided with an angle adjustment link. Each angle adjustment link is connected to the corresponding upper connecting piece.

[0008] Preferably, the upper connecting member is an upper connecting rod, and the lower connecting member is a lower connecting rod and a connecting rod. The middle sections of the two lower connecting rods are symmetrically connected to both sides of the fixed seat, and the same end of the two lower connecting rods is connected to a connecting rod. The other end is connected to the lower end of the corresponding lifting cross rod.

[0009] Preferably, the maximum pitch angle of the pitch mechanism is parallel to the base plate, while the maximum elevation angle is 11° with respect to the base plate.

[0010] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are: The present invention discloses a seat lifting structure by adding a connecting rod at the top and bottom of the X-shaped lifting crossbar to replace the rolling pair structure of rollers and slides, and integrating the pitching mechanism with the lifting mechanism. Practice has proven that the precision machining of the rotating mounting holes of each joint can achieve a tight fit and assembly, thereby making the seat more stable, greatly reducing the amount of shaking, and the smaller the gap, the less prone it is to wear, resulting in better riding comfort and a longer service life. Attached Figure Description

[0011] Figure 1 This is a perspective view of the present invention; Figure 2 This is a utility model Figure 1 An explosion diagram; Figure 3 This is a schematic diagram of the lifting structure of this utility model; Figure 4 This is a utility model Figure 3 An explosion diagram; Figure 5 These are diagrams showing the different states of the lifting mechanism of this utility model; Figure 6 These are diagrams showing the different states of the pitch mechanism of this utility model; In the attached diagram: 1. Seat; 2. Base plate; 3. Lifting crossbar; 4. Connecting crossbar; 5. Lower mounting base; 6. Fixed base; 7. Upper mounting base; 8. Connecting plate; 9. Airbag; 10. Pitch support; 11. Fixed circular plate; 12. Angle adjuster; 13. Splined shaft; 14. Knob handle; 15. Angle adjustment linkage; 16. Upper linkage; 17. Lower linkage; 18. Connecting rod. Detailed Implementation

[0012] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided with reference to the accompanying drawings and preferred embodiments. However, it should be noted that many details listed in the specification are merely to provide the reader with a thorough understanding of one or more aspects of the utility model, and these aspects can be achieved even without these specific details.

[0013] Please see Figures 1 to 6 This utility model provides a seat lifting structure, the technical solution of which is as follows: The system includes a logging vehicle, in which a seat 1 is provided in the cab. The seat 1 is installed in the cab via a base plate 2. Two lifting crossbars 3 are symmetrically arranged on the base plate 2. Each lifting crossbar 3 is formed by two connecting rods hinged in the middle, and multiple connecting crossbars 4 are provided between the two lifting crossbars 3. A lifting mechanism is provided inside the base plate 2. The tops of the two lifting crossbars 3 are connected to a pitching mechanism, and the seat 1 is installed on top of the pitching mechanism.

[0014] The existing seat 1 lifting mechanism and tilt adjustment mechanism adopt an "X" shaped cross bracket structure. The tilt bracket 10 is installed on the lifting mechanism. By inflating the airbag 9 and opening the cross rod, the seat cushion is raised. During the lifting process, one end of the cross rod is fixed through a shaft and can rotate, while the other end is equipped with a nylon roller. The roller can roll in the U-shaped upper slide bracket. The tilt bracket 10 is fixed to the upper slide bracket and can swing around the rotation axis, thus allowing manual adjustment of the seat cushion tilt angle. The U-shaped slide is formed by sheet metal stamping, which makes it difficult to achieve a tight fit with the roller. There will be a gap between the roller and the slide. After a period of use, the nylon roller and the slide will wear down due to continuous friction and impact, causing the seat 1 to wobble more and more. At the same time, the tilt bracket 10 and the lifting mechanism are only connected by a single shaft, which is not very reliable. By adding a connecting rod at the top and bottom of the X-shaped lifting crossbar 3 to replace the rolling pair structure of the roller and slide, and integrating the pitching mechanism with the lifting mechanism, it has been proven through practice that the precision machining of the rotating mounting holes of each joint can achieve a tight fit and assembly, thereby making the seat 1 more robust, greatly reducing the amount of shaking, and the smaller the gap, the less prone it is to wear, resulting in better riding comfort and a longer service life.

[0015] The lifting mechanism includes two lower mounting seats 5 symmetrically arranged on the rear end of the base plate 2. The front end of the base plate 2 is provided with a fixed seat 6. The lower end of each lifting cross rod 3 is connected to the corresponding lower mounting seat 5, and the lifting cross rod 3 is connected to the fixed seat 6 through a lower connector. The lower end of the pitch mechanism is provided with two upper mounting seats 7. The upper part of one end of each lifting cross rod 3 is connected to the corresponding upper mounting seat 7, and the other end is connected to the pitch mechanism through an upper connector. Two connecting plates 8 are symmetrically arranged between the two lifting cross rods 3, and an airbag 9 is connected between the two connecting plates 8. That is, the output end and the bottom of the airbag 9 are respectively connected to the corresponding connecting plate 8.

[0016] Using hexagonal step screws and self-lubricating copper sleeves, the rotating shaft holes of a pair of lifting cross rods 3 are passed through, and self-locking nuts are added to install them together as the main body of the lifting mechanism. The two ends of the airbag 9 are fixed to the two lifting cross rods 3 respectively. After the airbag 9 is inflated, the included angle between the two connecting rods of the same lifting cross rod 3 will increase. The lower connecting piece is installed with the fixed seat 6 using self-lubricating copper sleeves and step screws. The middle hole of the lower connecting rod 17 is installed with the fixed seat 6 using self-lubricating copper sleeves and step screws. The fixed seat 6 is fixed to the base plate 2 with 4 screws. The lower end of another lifting cross rod 3 is installed with the lower mounting seat 5 using self-lubricating copper sleeves and step screws. The lower mounting seat 5 is fixed to the base plate 2 with screws. The lower end hole of the upper connecting rod 16 is installed with the upper end hole of the corresponding lifting cross rod 3 using self-lubricating copper sleeves and step screws. Each pair of parts connected by self-lubricating copper sleeves can rotate relative to each other.

[0017] The pitch mechanism includes a pitch bracket 10 installed at the bottom of the seat 1. Two upper mounting seats 7 are symmetrically arranged at the rear end of the bottom of the pitch bracket 10. Two fixed circular plates 11 are symmetrically arranged on the left and right sides of the pitch bracket 10. Two angle adjusters 12 are symmetrically arranged inside the two horizontal bars on the left and right sides of the pitch bracket 10. Each angle adjuster 12 is coaxially arranged with the corresponding fixed circular plate 11. The two angle adjusters 12 are connected by a spline shaft 13. Each fixed circular plate 11 is provided with a knob handle 14. Each angle adjuster 12 is provided with an angle adjustment link 15. Each angle adjustment link is connected to the corresponding upper connector. The upper connector is an upper link 16. The lower connector is a lower link 17 and a connecting rod 18. The middle sections of the two lower links 17 are symmetrically connected to the two sides of the fixed seat 6. The same end of the two lower links 17 is connected to the connecting rod 18. The other end is connected to the lower end of the corresponding lifting cross bar 3.

[0018] Use self-lubricating copper sleeves and stepped screws to install the upper mounting bases 7 on both sides of the pitch bracket 10 and the upper holes of the corresponding lifting crossbars 3 together; use self-lubricating copper sleeves and stepped screws to install the upper holes of the upper connecting rod 16 and the holes of the angle adjusting connecting rod 15 together; the two faces of the angle adjuster 12 can rotate relative to each other and have a self-locking capability; the spline shaft 13 passes through the center of the two angle adjusters 12; the knob handle 14 is installed at both ends of the spline shaft 13; when the knob handle 14 is turned, the ratchet inside the angle adjuster 12 will rotate, which will cause the two faces of the angle adjuster 12 to rotate relative to each other, thereby adjusting the pitch angle of the pitch bracket 10.

[0019] The other end of the angle adjustment link 15 is welded to one side of the angle adjuster 12, so that the angle of the angle adjustment link 15 can be adjusted by turning the knob handle 14; the other side of the angle adjuster 12 is welded to the pitch bracket 10 near the designated position at the front end; each of the above two parts connected by a self-lubricating copper sleeve can rotate relative to each other.

[0020] The maximum pitch angle of the tilt mechanism is parallel to the base plate 2, while the maximum elevation angle is 11° relative to the base plate 2. After assembly, the pitch angle of the seat cushion can be adjusted by manually adjusting the angle adjustment linkage 15. The pitch angle adjustment range relative to the base plate 2 is -1° to 11°. When working on steep slopes, the maximum elevation angle of 11° can conform to the forward and backward tilt posture of the vehicle body, allowing the driver to adjust to a safe and comfortable posture, avoiding body slippage and operational instability caused by the limited angle of the seat 1. On flat slopes or in special scenarios, the pitch angle parallel to the base plate 2 meets different operating habits and vision requirements, covering a variety of operating scenarios and laying a solid foundation for safe operation.

[0021] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A seat (1) lifting structure, characterized in that, include: The logging vehicle has a seat (1) in the driver's cab. The seat (1) is installed in the driver's cab via a base plate (2). Two lifting crossbars (3) are symmetrically arranged on the base plate (2). Each lifting crossbar (3) is formed by two connecting rods hinged in the middle. Multiple connecting crossbars (4) are provided between the two lifting crossbars (3). A lifting mechanism is provided in the base plate (2). The tops of the two lifting crossbars (3) are connected to a pitching mechanism. The seat (1) is installed on the top of the pitching mechanism.

2. The seat (1) lifting structure according to claim 1, characterized in that: The lifting mechanism includes two lower mounting seats (5) symmetrically arranged on the rear end of the base plate (2). The front end of the base plate (2) is provided with a fixed seat (6). The lower end of each lifting cross rod (3) is connected to the corresponding lower mounting seat (5), and the lifting cross rod (3) is connected to the fixed seat (6) through a lower connector. The lower end of the pitch mechanism is provided with two upper mounting seats (7). The upper part of one end of each lifting cross rod (3) is connected to the corresponding upper mounting seat (7), and the other end is connected to the pitch mechanism through an upper connector. Two connecting plates (8) are symmetrically arranged between the two lifting cross rods (3), and an airbag (9) is connected between the two connecting plates (8). That is, the output end and the bottom of the airbag (9) are connected to the corresponding connecting plate (8) respectively.

3. The seat (1) lifting structure according to claim 2, characterized in that: The pitch mechanism includes a pitch bracket (10) installed at the bottom of the seat (1). Two upper mounting seats (7) are symmetrically provided at the rear end of the bottom of the pitch bracket (10). Two fixed circular plates (11) are symmetrically provided on the left and right sides of the pitch bracket (10). Two angle adjusters (12) are symmetrically provided in the two horizontal bars on the left and right sides of the pitch bracket (10). Each angle adjuster (12) is coaxially arranged with the corresponding fixed circular plate (11). The two angle adjusters (12) are connected by a spline shaft (13). A knob handle (14) is provided on the outside of each fixed circular plate (11). An angle adjustment link (15) is provided on each angle adjuster (12). Each angle adjustment link is connected to the corresponding upper connecting piece.

4. The seat (1) lifting structure according to claim 3, characterized in that: The upper connector is an upper connecting rod (16), and the lower connector is a lower connecting rod (17) and a connecting rod (18). The middle sections of the two lower connecting rods (17) are symmetrically connected to both sides of the fixed seat (6), and the same end of the two lower connecting rods (17) is connected to the connecting rod (18). The other end is connected to the lower end of the corresponding lifting cross rod (3).

5. The seat (1) lifting structure according to claim 3, characterized in that: The maximum pitch angle of the pitch mechanism is parallel to the base plate (2), while the maximum elevation angle is 11° with respect to the base plate (2).

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