Tractor seat adjusting device

Abstract

The utility model relates to the technical field of tractor seats, in particular to a tractor seat adjusting device. Comprising a cushion, a lifting box is fixedly installed at the bottom of the cushion, a plurality of threaded columns capable of being driven by a driving mechanism to rotate are installed at the bottom of the lifting box, the tops of the threaded columns are smooth parts rotationally connected with the lifting box, and the bottoms of the threaded columns are threaded parts; the device further comprises a threaded cylinder fixedly installed on a tractor rack, and the threaded part is located in the threaded cylinder and is in threaded fit with the threaded cylinder. By means of the structure, lifting of the lifting box can be controlled by controlling rotation of the threaded column in the positive direction and the negative direction, then the height of the cushion is adjusted, choices of a driver are increased, and the driver is more comfortable in the driving process.

Description

Technical Field

[0001] This utility model relates to the field of tractor seat technology, specifically to a tractor seat adjustment device. Background Technology

[0002] Tractor seats are a crucial component of tractor driving systems. Tractor drivers often need to sit in tractor seats for extended periods while operating the tractor, so the comfort of the tractor seat directly impacts the driver's experience.

[0003] In the existing technology, some tractor seats are still rigidly connected to the tractor frame, meaning that the tractor seats cannot be adjusted. However, since drivers have different heights, their requirements for seat height also vary. If the seat height is not suitable, it will directly reduce the comfort of driving the tractor and have a negative impact on the driver's driving experience. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides a tractor seat adjustment device to solve the problem in the prior art where the inability to adjust the height of the tractor seat leads to reduced comfort during tractor driving, thus negatively impacting the driver's driving experience.

[0005] This utility model is achieved using the following technical solution: a tractor seat adjustment device, including a seat cushion, a lifting box fixedly installed at the bottom of the seat cushion, a plurality of threaded columns that can be driven to rotate by a drive mechanism installed at the bottom of the lifting box, the top of the threaded column being a smooth part that is rotatably connected to the lifting box, and the bottom of the threaded column being a threaded part; it also includes a threaded cylinder fixedly installed on the tractor frame, the threaded part being located inside the threaded cylinder and threadedly engaged with the threaded cylinder.

[0006] The above structure allows the device to control the lifting of the lifting box by controlling the rotation of the threaded column in both directions, thereby adjusting the height of the seat, increasing the driver's options, and making the driving process more comfortable.

[0007] Preferably, the drive mechanism includes a dual-axis motor fixedly installed at the bottom of the lifting box. Each output shaft of the dual-axis motor is fixedly connected to a worm gear, with the end of the worm gear away from the dual-axis motor rotatably engaging with the lifting box. Above the worm gear, a rotating shaft is rotatably installed on the lifting box, and a worm wheel threadedly engaging with the worm gear is fixedly installed on the rotating shaft. A first bevel gear is installed on the rotating shaft in front of and behind the worm wheel. The top of the threaded column extends into the lifting box and is fixedly installed with a second bevel gear meshing with the first bevel gear. By driving the rotation of two sets of worm gear mechanisms with a dual-axis motor, the four threaded columns are controlled to rotate simultaneously, making the rotation of the four threaded columns more synchronized and the lifting of the lifting box more stable.

[0008] Preferably, a guide sleeve is also fixedly installed on the frame, and a first guide post is fixedly installed on the bottom surface of the lifting box. The bottom of the first guide post is located inside the guide sleeve and slides in cooperation with the guide sleeve. The arrangement of the guide sleeve and the first guide post makes the lifting box more stable during the up and down lifting process.

[0009] Preferably, a U-shaped adjusting frame is fixedly installed on the back of the lifting box, a rotating cylinder is rotatably installed at the opening of the adjusting frame, and a backrest is fixedly installed on the rotating cylinder; a limiting mechanism for preventing the rotating cylinder from rotating is also installed on the adjusting frame. The adjustable backrest further increases the comfort of the cab and improves the driver's operating experience.

[0010] Preferably, the rotating drum is fixedly equipped with a plurality of limiting plates arranged in a circumferential array. The limiting mechanism includes a first sliding groove on the adjusting frame, in which a limiting block capable of moving up and down is slidably installed. The top surface of the limiting block is an arc surface, and the arc surface of the limiting block is provided with a plurality of protrusions arranged in a circumferential array. When the limiting block is at the top, the protrusions can be inserted between any two limiting blocks. When the limiting block is at the top, the backrest is locked, and the driver can lean against the backrest for greater comfort. When the limiting block moves downward, the backrest can be rotated to present different leaning angles, increasing selectivity and making operation more convenient.

[0011] Preferably, a first spring is provided between the bottom of the limiting block and the bottom surface of the first sliding groove, and a sliding hole is provided in the middle of the limiting block. A limiting rod that passes through the sliding hole and can prevent the limiting block from moving is slidably installed on the adjusting frame. The position of the limiting block is fixed by the limiting rod passing through the sliding hole, making the device more stable.

[0012] Preferably, the limiting rod is provided with a limiting groove, and when the limiting groove is located in the sliding hole, the limiting block can move up and down. By setting the limiting groove, and cooperating with the first spring, when the limiting groove is located in the sliding hole, the limiting block can move up and down according to the depth of the limiting groove, and the locking and contact locking of the limiting block can be achieved by moving the limiting rod laterally, making it more convenient to use.

[0013] Preferably, the adjusting frame is further provided with a transverse second sliding groove, one end of the limiting rod is located in the second sliding groove and slides in cooperation with the second sliding groove, and the other end of the limiting rod extends to the outside of the adjusting frame; a second spring is provided between the end of the limiting rod located in the second sliding groove and the inner wall of the second sliding groove. With the provision of the second sliding groove and the second spring, when the end of the limiting rod located on the outside of the adjusting frame is pressed and then released, the limiting rod can spring back to its original position under the action of the second spring, further improving the convenience of operation.

[0014] Preferably, the mating surface between the protruding rib and the limiting plate is an arc surface, and the bottom surface of the limiting plate is also an arc surface. By using the arc surface, when the limiting block is not restricted by the limiting rod, it can be moved downwards simply by rotating the rotating cylinder and pressing the limiting block.

[0015] Preferably, the limiting plate has a coverage angle of 45°, and the protruding rib has a coverage angle of 90°. The 45° setting of the limiting plate allows the backrest to be adjusted from 0° to 45°, while the 90° coverage angle of the protruding rib ensures that the limiting plate is firmly locked regardless of the angle adjusted.

[0016] In summary, the beneficial effects of this utility model are as follows:

[0017] 1. A dual-shaft motor drives two worm gears to mesh with two worm wheels, which in turn drives four first bevel gears to rotate. These first bevel gears then drive the rotation of the threaded cylinders. The threaded cylinders cooperate with a fixed threaded cylinder, thus achieving synchronous lifting and lowering of the four threaded cylinders. This, in turn, drives the lifting box to lift and lower, resulting in greater stability during the lifting process and improved comfort in the cab.

[0018] 2. By setting up an upper limit plate on the rotating drum and a limit block on the adjusting frame that can move up and down, when the limit block is at its highest position, several protrusions on the limit block will be inserted between the limit plates to fix the rotating drum. When the limit block moves down, the rotating drum can rotate and adjust, thereby realizing the adjustment of the backrest. This allows the driver to adjust it according to their own habits, further improving the comfort of the cab and making the driver's driving experience better. Attached Figure Description

[0019] Figure 1 This is a first-view structural schematic diagram of the present invention;

[0020] Figure 2 This is a structural schematic diagram of the present invention from a second perspective;

[0021] Figure 3 This is a schematic diagram of the internal structure of the lifting box;

[0022] Figure 4 for Figure 3 Top view;

[0023] Figure 5 This is a schematic diagram of the structure of the adjusting frame and the rotating drum.

[0024] Figure 6 This is a schematic diagram of the mechanism for the cooperation between the limit block and the rotating drum;

[0025] Figure 7 for Figure 5 A sectional view;

[0026] Figure 8 This is a partial structural diagram of the fit between the limiting rod and the second sliding groove.

[0027] In the diagram: 1-Seat cushion; 2-Lifting box; 21-Threaded cylinder; 22-Threaded column; 23-Dual-axis motor; 24-Worm gear; 25-Worm wheel; 26-Rotating shaft; 27-First bevel gear; 28-Second bevel gear; 3-Frame; 31-Guide sleeve; 32-First guide column; 4-Backrest; 41-Rotating cylinder; 42-Limiting plate; 5-Adjusting frame; 51-Limiting rod; 52-Limiting block; 53-Limiting groove; 54-Sliding hole; 55-Protruding rib; 56-First sliding groove; 57-First spring; 58-Second spring; 59-Fixed shaft; 60-Second sliding groove; 61-Guide cylinder; 62-Second guide column. Detailed Implementation

[0028] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0029] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0030] The following is a description of preferred embodiments of the present invention in conjunction with the accompanying drawings.

[0031] like Figure 1 , Figure 2 As shown, this utility model provides a tractor seat adjustment device, including a seat cushion 1, a lifting box 2 fixedly installed at the bottom of the seat cushion 1, and a rotatable backrest 4 installed at the rear of the seat cushion 1. Several threaded posts 22 that can be driven to rotate by a drive mechanism are installed at the bottom of the lifting box 2, and several threaded cylinders 21 that are threadedly engaged with the threaded posts 22 are fixedly installed on the tractor frame 3. Specifically, the top of the threaded post 22 is a smooth part that rotatably connects with the lifting box 2, and the bottom of the threaded post 22 is a threaded part. The bottom of the threaded part is located inside the threaded cylinder 21 and is threadedly engaged with the threaded cylinder 21.

[0032] like Figure 2 , Figure 3 , Figure 4As shown, the driving mechanism described above can be any mechanism capable of driving the rotation of several threaded columns 22, for example, each threaded column 22 can be directly driven by a drive motor. In this embodiment, the driving mechanism includes a dual-axis motor 23 fixedly installed at the bottom of the inner side of the lifting box 2. The two output shafts of the dual-axis motor 23 point to the left and right directions respectively. Each output shaft of the dual-axis motor 23 is fixedly connected to a worm gear 24. The end of the worm gear 24 away from the dual-axis motor 23 is rotatably connected to the lifting box 2. A rotating shaft 26 is rotatably installed above the two worm gears 24 in the lifting box 2. A worm wheel 25 that is threadedly engaged with the worm gear 24 is fixedly installed on the rotating shaft 26. A first bevel gear 27 is installed in front of and behind the worm wheel 25 on the rotating shaft 26. The top of the threaded column 22 extends into the lifting box 2 and is fixedly installed with a second bevel gear 28 that meshes with the first bevel gear 27.

[0033] The aforementioned drive mechanism enables a synchronous movement of four threaded pins 22 driven by a dual-axis motor 23. The dual-axis motor 23 is located in the middle of the bottom inner side of the lifting box 2, while the four threaded pins 22 are located at the four corners of the lifting box 2. The four threaded pins 22, the first bevel gear 27, and the second bevel gear 28 are symmetrically arranged front-to-back and left-to-right.

[0034] Due to the symmetrical installation, the two second bevel gears 28 rotate in opposite directions, meaning the two threaded posts 22 rotate in opposite directions. To ensure synchronized upward or downward movement, the threads of the two threaded posts 22 are opposite in direction. In short, when the dual-shaft motor 23 rotates forward or reverse, the upward or downward movement of the threaded posts 22 is synchronized.

[0035] As a further illustration of this example, in order to make the lifting box 2 more stable when rising or falling, a guide sleeve 31 is also fixedly installed on the frame 3, and a first guide post 32 is fixedly installed on the bottom surface of the lifting box 2. The bottom of the first guide post 32 is located inside the guide sleeve 31 and slides in cooperation with the guide sleeve 31.

[0036] like Figure 2 , Figure 5 , Figure 7 As shown, a U-shaped adjusting frame 5 is fixedly installed on the back of the lifting box 2. A fixed shaft 59 is fixedly installed at the opening of the adjusting frame 5. A rotating drum 41 is sleeved on the fixed shaft 59, and a backrest 4 is fixedly installed on the rotating drum 41. A limiting mechanism for preventing the rotating drum 41 from rotating is also installed on the adjusting frame 5.

[0037] like Figure 5 , Figure 6As shown, a number of limiting plates 42 arranged in a circular array are fixedly installed on the rotating drum 41. The limiting mechanism includes a first slide groove 56 provided on the adjusting frame 5. A limiting block 52 that can move up and down is slidably installed in the first slide groove 56. The top surface of the limiting block 52 is an arc surface. A number of protrusions 55 arranged in a circular array are provided on the arc surface of the limiting block 52. When the limiting block 52 is at the top, the protrusions 55 can be inserted between any two limiting blocks 52.

[0038] The mating surface between the protruding rib 55 and the limiting plate 42 is an arc surface, and the bottom surface of the limiting plate 42 is also an arc surface. This allows the limiting block 52 to be pressed downward when the rotating drum 41 is rotated.

[0039] In this embodiment, the coverage angle of the limiting plate 42 is 45°, and the coverage angle of the protrusion 55 is 90°. This allows for adjustment of the backrest 4 between 0° and 45°. The coverage angle of the protrusion 55 is twice that of the limiting plate 42, ensuring that regardless of how the rotating cylinder 41 is adjusted, when the limiting block 52 prevents its rotation, there is always a protrusion 55 inserted between any two limiting plates 42, thus making the backrest 4 more stably fixed.

[0040] like Figure 5 , Figure 6 , Figure 7 As shown, a first spring 57 is provided between the bottom of the limiting block 52 and the bottom surface of the first sliding groove 56. A sliding hole 54 is provided in the middle of the limiting block 52. A limiting rod 51 that passes through the sliding hole 54 and can prevent the limiting block 52 from moving is slidably installed on the adjusting frame 5. Specifically, a limiting groove 53 is provided on the limiting rod 51. When the limiting groove 53 is located in the sliding hole 54, the limiting block 52 can move up and down.

[0041] A second transverse sliding groove 60 is also provided on the adjusting frame 5. One end of the limiting rod 51 is located inside the second sliding groove 60 and slides in cooperation with the second sliding groove 60. The other end of the limiting rod 51 extends to the outside of the adjusting frame 5. To prevent accidental contact, a flip-top protective cover can be added to the adjusting frame 5 to cover the part of the limiting rod 51 that is exposed outside the adjusting frame 5. This is prior art and not the main invention point, so it will not be described in detail here. A second spring 58 is provided between the end of the limiting rod 51 located inside the second sliding groove 60 and the inner wall of the second sliding groove 60. The second spring 58 is sleeved on the guide cylinder 61 and the second guide post 62. The guide cylinder 61 is fixedly installed on the inner wall of the second sliding groove 60. The second guide post 62 is fixedly installed on the end of the limiting rod 51. The end of the second guide post 62 away from the limiting rod 51 is located inside the guide cylinder 61 and slides in cooperation with the guide cylinder 61. By setting the guide cylinder and the second guide post, the lateral sliding of the limiting rod 51 can be made more stable. Furthermore, the limiting rod 51 can be limited by the limiting of the second guide post and the guide cylinder. When the limiting rod 51 is pressed to the maximum extent, the limiting groove 53 can be just inside the sliding hole 54. At this time, the end of the second guide post 62 away from the limiting rod 51 is just in contact with the inner wall of the guide cylinder 61.

[0042] The operating principle of this device is as follows: When the driver enters the cab, he controls the dual-axis motor 23 to rotate forward or backward according to his needs through the controller. The output shaft of the dual-axis motor 23 will drive the worm gears 24 on the left and right sides to rotate, which in turn drives the threaded column 22 to rotate through the worm wheel 25, the first bevel gear 27, and the second bevel gear 28, thereby causing the lifting box 2 to rise or fall. After adjusting the height of the lifting box 2 and the seat cushion 1, the angle of the backrest 4 can also be adjusted. Specifically, first, press the protruding limiting rod 51 with one hand until it is fully pressed down. At this time, the limiting groove 53 is located in the position of the sliding hole 54. Then, the other hand can rotate the backrest 4. When the angle is suitable, release the hand that is pressing the limiting rod 51, hold the backrest 4 and shake it slightly. When the protrusion 55 is aligned with the limiting plate 42, under the action of the first spring 57, the limiting block 52 moves upward and the protrusion 55 is inserted between the limiting plates 42. Then, under the action of the second spring 58, the limiting rod 51 will also return to its original position, and the limiting groove 53 will disengage from the position of the sliding hole 54, thereby completing the adjustment of the angle of the backrest 4.

[0043] In summary, this utility model provides a tractor seat adjustment device that uses a dual-shaft motor 23 to drive two worm gears 24 and two worm wheels 25 to mesh, thereby simultaneously driving four first bevel gears 27 to rotate. These, in turn, drive four second bevel gears 28 to rotate threaded posts 22. The threaded posts 22 cooperate with a fixed threaded cylinder 21, enabling the four threaded posts 22 to rise and fall synchronously, thus raising and lowering the lifting box 2. This process is more stable and improves the comfort of the cab. Furthermore, the device utilizes an upper limit plate 42 on the rotating cylinder 41 and a movable limit block 52 on the adjustment frame 5. When the limit block 52 is at its highest position, several protrusions 55 on the limit block 52 are inserted between the limit plates 42 to fix the rotating cylinder 41. When the limit block 52 moves downwards, the rotating cylinder 41 can rotate and adjust, thus allowing the backrest 4 to be adjusted according to the driver's preferences, further improving cab comfort and enhancing the driver's driving experience.

[0044] 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 substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A tractor seat adjustment device comprising a seat cushion (1), characterized in that, The bottom of the seat cushion (1) is fixedly provided with a lifting box (2), the bottom of the lifting box (2) is provided with a plurality of threaded columns (22) rotatable by a driving mechanism, the top of the threaded column (22) is a smooth part rotatably connected with the lifting box (2), and the bottom of the threaded column (22) is a threaded part; the threaded part is located in a threaded cylinder (21) fixedly provided on a tractor frame (3) and threadedly matched with the threaded cylinder (21).

2. The tractor seat adjustment device of claim 1, wherein, The driving mechanism comprises a double-shaft motor (23) fixedly provided on the bottom of the lifting box (2), the output shafts of the double-shaft motor (23) are both fixedly connected with worms (24), one end of the worm (24) away from the double-shaft motor (23) is rotatably matched with the lifting box (2); the lifting box (2) is rotatably provided with a rotating shaft (26) above the worm (24), the rotating shaft (26) is fixedly provided with a worm wheel (25) threadedly matched with the worm (24); the rotating shaft (26) is provided with a first bevel gear (27) at the front and rear positions of the worm wheel (25), and the top end of the threaded column (22) extends into the lifting box (2) and is fixedly provided with a second bevel gear (28) meshed with the first bevel gear (27).

3. The tractor seat adjustment device of claim 1, wherein, The frame (3) is further fixedly provided with a guide sleeve (31), the bottom surface of the lifting box (2) is fixedly provided with a first guide column (32), and the bottom of the first guide column (32) is located in the guide sleeve (31) and is slidably matched with the guide sleeve (31).

4. The tractor seat adjustment device of claim 1, wherein, The back of the lifting box (2) is fixedly provided with a "U"-shaped adjusting frame (5), the opening of the adjusting frame (5) is rotatably provided with a rotating cylinder (41), and the rotating cylinder (41) is fixedly provided with a backrest (4); the adjusting frame (5) is further provided with a limiting mechanism for preventing the rotating cylinder (41) from rotating.

5. The tractor seat adjustment device of claim 4, wherein, The rotating cylinder (41) is fixedly provided with a plurality of limiting plates (42) distributed in a circumferential array, the limiting mechanism comprises a first sliding groove (56) provided on the adjusting frame (5), the first sliding groove (56) is slidably provided with a limiting block (52) capable of moving up and down, the top surface of the limiting block (52) is an arc surface, a plurality of convex ridges (55) are arranged in a circumferential array on the arc surface of the limiting block (52), and when the limiting block (52) is located at the uppermost position, the convex ridges (55) can be inserted between any two limiting blocks (52).

6. The tractor seat adjustment device of claim 5, wherein, A first spring (57) is arranged between the bottom of the limiting block (52) and the bottom surface of the first sliding groove (56), a sliding hole (54) is arranged in the middle of the limiting block (52), and the adjusting frame (5) is slidably provided with a limiting rod (51) penetrating through the sliding hole (54) and capable of preventing the limiting block (52) from moving.

7. The tractor seat adjustment device of claim 6, wherein, The limiting rod (51) is provided with a limiting groove (53), and when the limiting groove (53) is located in the sliding hole (54), the limiting block (52) can move up and down.

8. The tractor seat adjustment device of claim 7, wherein, The adjusting frame (5) is further provided with a transverse second sliding groove (60), one end of the limiting rod (51) is located in the second sliding groove (60) and is in sliding fit with the second sliding groove (60), and the other end of the limiting rod (51) extends to the outside of the adjusting frame (5); a second spring (58) is arranged between the one end of the limiting rod (51) located in the second sliding groove (60) and the inner wall of the second sliding groove (60).

9. The tractor seat adjustment device of claim 5, wherein, The matching surface of the convex ridge (55) and the limiting plate (42) is an arc surface, and the bottom surface of the limiting plate (42) is also an arc surface.

10. The tractor seat adjustment device of claim 5, wherein, The covering angle of the limiting plate (42) is 45°, and the covering angle of the convex ridge (55) is 90°.

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