Adjustable steering column of agricultural machine

Abstract

The utility model provides an agricultural machine adjustable steering column which comprises a connecting plate, a vertical plate arranged at the bottom of the connecting plate, a connecting frame arranged on the side wall of the connecting plate, a lower column arranged on the side wall of the connecting frame, and a connecting shaft arranged in the lower column, penetrating through the connecting frame and connected with a steering wheel of an agricultural machine. A first steering shifting fork is arranged at the end of the connecting shaft, a cross universal joint is rotatably arranged on the inner wall of the first steering shifting fork, a second steering shifting fork is rotatably arranged at the shaft end of the cross universal joint, and a driving shaft which penetrates through the side wall of the vertical plate and is connected with a steering gear of the agricultural machine is arranged at the end of the second steering shifting fork. The side wall of the lower pipe column is sleeved with an upper pipe column; the connecting shaft comprises a guide pipe arranged in the lower pipe column, a connecting shaft rotationally connected with the upper pipe column is arranged at one end of the guide pipe, and an adjusting spring connected with the end portion of the connecting shaft is arranged in the guide pipe. The telescopic pipe column is reasonable in structure, the height is convenient to adjust, and the front-back rotating position is convenient to adjust when the telescopic pipe column is used.

Description

Technical Field

[0001] The utility model relates to an agricultural machine, in particular to an adjustable steering column of the agricultural machine. Background Art

[0002] Agricultural machinery, also known as agricultural machinery, refers to various machines used in the process of crop planting and animal husbandry production, as well as the primary processing and treatment of agricultural and livestock products. Agricultural machinery includes agricultural power machinery, farmland construction machinery, soil cultivation machinery, planting and fertilizing machinery, plant protection machinery, farmland irrigation and drainage machinery, crop harvesting machinery, agricultural product processing machinery, animal husbandry machinery and agricultural transport machinery, etc. The steering column is an important part of agricultural machinery.

[0003] In the prior art, when the existing steering column is in use, since the steering wheel is connected to the connecting shaft of the steering column, it is not convenient to adjust the height of the steering wheel connected to the steering column. In addition, it is not convenient to adjust the front and rear rotation position of the steering wheel when in use, so that it is impossible to ensure that the steering wheel on the steering column can adapt to different people. Now, an adjustable steering column for agricultural machinery is urgently needed to solve the above problems. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide an adjustable steering column for agricultural machinery to solve the problems raised in the above-mentioned background technology. The present invention has a reasonable structure, convenient height adjustment, and convenient front and rear rotation position adjustment during use.

[0005] In order to achieve the above-mentioned purpose, the utility model is realized through the following technical scheme: an adjustable steering column for agricultural machinery, comprising:

[0006] A connecting plate, a vertical plate is arranged at the bottom of the connecting plate, a connecting frame is arranged on the side wall of the connecting plate, a lower pipe column is arranged on the side wall of the connecting frame, a connecting shaft penetrating the connecting frame and connected to the steering wheel of the agricultural machine is arranged inside the lower pipe column, a first steering fork is arranged at the end of the connecting shaft, a cross universal joint is rotatably arranged on the inner wall of the first steering fork, a second steering fork is rotatably arranged on the shaft end of the cross universal joint, and a driving shaft penetrating the side wall of the vertical plate and connected to the steering gear of the agricultural machine is arranged at the end of the second steering fork;

[0007] An upper pipe column is sleeved on the side wall of the lower pipe column;

[0008] The connecting shaft comprises a guide tube arranged inside the lower pipe column, a connecting shaft rotatably connected to the upper pipe column is arranged at one end of the guide tube, an adjusting spring connected to the end of the connecting shaft is arranged inside the guide tube, a spline shaft penetrating the connecting frame and placed inside the guide tube and connected to the adjusting spring is rotatably arranged inside the lower pipe column, and the spline shaft is connected to the first steering fork;

[0009] The side wall of the upper pipe column is provided with a support plate, and a locking threaded rod penetrating the side wall of the upper pipe column and contacting the side wall of the lower pipe column is provided inside the support plate.

[0010] Furthermore, a guide seat is provided on the side wall of the vertical plate, the drive shaft passes through the guide seat and is rotatably connected to the guide seat, a first bearing is provided between the inner wall of the lower tube column and the side wall of the spline shaft, a second bearing is provided between the inner wall of the upper tube column and the side wall of the connecting shaft, and a cover is provided on the end of the upper tube column away from the spline shaft and is sleeved on the side wall of the connecting shaft, and the side wall of the spline shaft and the inner wall of the guide tube are connected by a spline.

[0011] Furthermore, a limiting guide block is provided on the side wall of the upper pipe column, a guide plate is provided on the side wall of the connecting frame, a through guide groove matching the limiting guide block is opened on the side wall of the guide plate, and the guide plate and the upper pipe column are parallel to each other.

[0012] Furthermore, a spline groove is provided at the end of the first steering fork, the spline shaft is placed inside the spline groove, a clamping groove connected to the spline groove is provided on the side wall of the first steering fork, and a locking bolt is provided on the side wall of the first steering fork that passes through the clamping groove and is used to tighten the spline shaft.

[0013] Furthermore, a second rotating column is arranged between the connecting plate and the connecting frame, a mounting groove is arranged on the top of the connecting plate, a pair of connecting plates are symmetrically arranged on the bottom of the connecting plate, a third rotating column is arranged between the pair of connecting plates, a mounting plate is arranged on the side wall of the third rotating column, a rotating groove is arranged on the top of the mounting plate, a pressure block is arranged inside the rotating groove, a first rotating shaft penetrating the rotating groove is arranged between the mounting plate and the pressure block, a connecting frame is arranged inside the connecting frame, a locking gas spring connected to the connecting frame and placed inside the mounting groove is arranged on the side wall of the mounting plate, a second rotating shaft is arranged between the locking gas spring and the connecting frame, the locking head of the locking gas spring is placed inside the rotating groove, and a driving component for driving the pressure block to apply force to the locking head of the locking gas spring so that the locking gas spring locks or releases the connecting frame and the connecting plate is arranged inside the connecting plate.

[0014] Furthermore, a rotation limit groove is provided on a side of the connecting frame away from the lower pipe column, and a limit bolt placed inside the rotation limit groove is provided on the side wall of the connecting plate.

[0015] Furthermore, the driving assembly includes a first rotating column arranged inside the connecting plate, an adjusting pedal is arranged on the side wall of the first rotating column, a torsion spring is arranged between the adjusting pedal and the connecting plate and is sleeved on the side wall of the first rotating column, a mounting block is arranged on the inner side wall of the connecting plate, a hook plate is arranged on the side wall of the adjusting pedal, and a pull wire is arranged inside the hook plate and passes through the mounting block, the mounting plate and the pressure block in sequence.

[0016] Furthermore, an avoidance groove for avoiding the hook plate and the pull wire is opened on the top of the connecting plate, and a fixing bolt is arranged between the hook plate and the adjusting foot pedal.

[0017] Furthermore, a groove matching the locking head of the locking gas spring is formed on one side of the pressure block close to the locking gas spring.

[0018] Furthermore, a fixing column is provided on the side wall of the connecting plate, a fixing threaded hole is opened inside the fixing column, a limiting plate is provided on the side wall of the upper pipe column, a sliding groove matching the side wall of the upper pipe column is opened inside the limiting plate, and a plurality of mounting holes are opened on the side wall of the limiting plate.

[0019] According to the utility model, an adjustable steering column for an agricultural machine is provided, by applying force to the steering wheel on the connecting shaft, thereby driving the connecting shaft, the upper column and the guide tube to move as a whole close to one side of the connecting frame. During the movement, the connecting shaft pushes the upper column to slide along the side wall of the lower column, and the connecting shaft pushes the inner wall of the guide tube to slide along the side wall of the spline shaft. At the same time, the side wall of the guide tube slides along the inner wall of the lower column. At this time, the adjustment spring is in a compressed state. After being adjusted to a suitable position, the locking threaded rod is threadedly connected to the support plate, thereby driving the locking threaded rod to move downward and fit closely with the side wall of the lower column, thereby completing the locking of the connection position between the upper column and the lower column to prevent the connection from loosening, playing the role of facilitating the height adjustment of the upper column, and then playing the role of adjusting the height of the steering wheel;

[0020] By using the driving component to apply force to the pressure block, the pressure block pushes the locking head of the locking gas spring to move inside the locking gas spring, causing the locking gas spring to lose the lock on the connecting frame, thereby losing the lock on the connecting frame, and then losing the lock between the connecting frame and the connecting plate. Then, force is applied to the connecting shaft connected to the steering wheel, so that the connecting shaft drives the connecting frame to rotate along the connecting frame under the action of the second rotating column, and at the same time drives the connecting frame to rotate along the locking gas spring under the action of the second rotating shaft, thereby completing the adjustment of the front and rear rotation position of the steering wheel when in use. When the adjustment is completed, the driving component stops applying force to the pressure block. At this time, the locking gas spring continues to lock the connecting frame and the connecting plate after the adjusted position, thereby locking the adjusted position of the connecting shaft, and then locking the adjusted front and rear rotation position of the steering wheel when in use, which facilitates the adjustment of the front and rear rotation position of the steering wheel when in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0022] Figure 1 It is a three-dimensional diagram of an adjustable steering column for an agricultural machine according to an embodiment of the utility model;

[0023] Figure 2 A three-dimensional diagram of an adjustable steering column for an agricultural machine according to an embodiment of the utility model from another perspective;

[0024] Figure 3 It is a stereoscopic diagram of a driving assembly in an adjustable steering column for an agricultural machine according to an embodiment of the utility model;

[0025] Figure 4 It is a three-dimensional diagram of a mounting plate in an adjustable steering column for an agricultural machine according to an embodiment of the utility model;

[0026] Figure 5 It is a three-dimensional diagram of the connection between the guide plate and the upper column in an adjustable steering column for an agricultural machine according to an embodiment of the utility model;

[0027] Figure 6 It is a front cross-sectional view of the connection between the lower column and the upper column in an adjustable steering column for an agricultural machine according to one embodiment of the utility model;

[0028] Figure 7 It is a three-dimensional diagram of the connection between the lower column and the upper column in an adjustable steering column for an agricultural machine according to an embodiment of the utility model;

[0029] Figure 8 It is a stereoscopic view of the connection between the lower pipe column and the second steering fork in an adjustable steering pipe column for an agricultural machine according to an embodiment of the utility model;

[0030] Fig. 9 It is a three-dimensional diagram of the connection between the mounting plate and the locking gas spring in an adjustable steering column for an agricultural machine according to an embodiment of the utility model;

[0031] In the figure: 1, connecting plate; 101, fixing column; 102, mounting groove; 103, avoidance groove; 2, driving assembly; 201, first rotating column; 202, torsion spring; 203, adjusting foot pedal; 204, hook plate; 2041, fixing bolt; 205, pull wire; 206, mounting block; 3, vertical plate; 31, guide seat; 4, connecting plate; 41, third rotating column; 5, mounting plate; 51, rotating groove; 52, first rotating shaft; 6, locking gas spring; 61, locking head; 7, connecting frame; 71, second rotating shaft; 8, connecting frame; 81, second rotating column; 82, rotating limit groove; 83, Limit bolt; 9, lower column; 91, first bearing; 10, locking threaded rod; 11, support plate; 12, upper column; 121, cover; 122, second bearing; 13, connecting shaft; 131, spline shaft; 132, guide tube; 133, adjusting spring; 134, connecting shaft; 14, limit guide block; 15, guide plate; 151, guide groove; 16, first steering fork; 161, clamping groove; 162, locking bolt; 163, spline groove; 17, cross universal joint; 18, second steering fork; 19, drive shaft; 20, pressure block; 21, groove; 22, limit plate. DETAILED DESCRIPTION

[0032] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0033] like Figure 1 As shown, the utility model provides a technical solution: an adjustable steering column for an agricultural machine, comprising:

[0034] A connecting plate 1, a vertical plate 3 is arranged at the bottom of the connecting plate 1, a connecting frame 8 is arranged on the side wall of the connecting plate 1, a lower pipe column 9 is arranged on the side wall of the connecting frame 8, a connecting shaft 13 penetrating the connecting frame 8 and connected to the steering wheel of the agricultural machine is arranged inside the lower pipe column 9, a first steering fork 16 is arranged at the end of the connecting shaft 13, a cross universal joint 17 is rotatably arranged on the inner wall of the first steering fork 16, a second steering fork 18 is rotatably arranged on the shaft end of the cross universal joint 17, and a driving shaft 19 penetrating the side wall of the vertical plate 3 and connected to the steering gear of the agricultural machine is arranged at the end of the second steering fork 18;

[0035] The side wall of the lower pipe column 9 is sleeved with an upper pipe column 12;

[0036] The connecting shaft 13 includes a guide tube 132 disposed inside the lower pipe column 9, a connecting shaft 134 rotatably connected to the upper pipe column 12 is disposed at one end of the guide tube 132, an adjusting spring 133 connected to the end of the connecting shaft 134 is disposed inside the guide tube 132, a spline shaft 131 penetrating the connecting frame 8 and disposed inside the guide tube 132 and connected to the adjusting spring 133 is rotatably disposed inside the lower pipe column 9, and the spline shaft 131 is connected to the first steering fork 16;

[0037] A support plate 11 is provided on the side wall of the upper tube column 12, and a locking threaded rod 10 is provided inside the support plate 11, which penetrates the side wall of the upper tube column 12 and contacts the side wall of the lower tube column 9. This design applies force to the steering wheel on the connecting shaft 13, thereby driving the connecting shaft 134, the upper tube column 12, and the guide tube 132 to move as a whole close to one side of the connecting frame 8. During the movement, the connecting shaft 134 pushes the upper tube column 12 to slide along the side wall of the lower tube column 9, and the connecting shaft 134 pushes the inner wall of the guide tube 132 to slide along the side wall of the spline shaft 131. At the same time, the side wall of the guide tube 132 slides along the inner wall of the lower tube column 9. At this time, the adjusting spring 133 is in a compressed state. After being adjusted to a suitable position, the locking threaded rod 10 is threadedly connected to the support plate 11 through the locking threaded rod 10, thereby driving the locking threaded rod 10 to move downward and connect with the lower tube The side walls of the column 9 fit tightly together, thereby locking the connection position between the upper column 12 and the lower column 9 and preventing the connection from loosening, which facilitates the height adjustment of the upper column 12, and further adjusts the height of the steering wheel. Since the connecting shaft 134, the upper column 12, and the guide tube 132 move as a whole close to one side of the connecting frame 8, the connecting shaft 134 is not affected by the rotation along the upper column 12. The rotation of the connecting shaft 134 drives the guide tube 132 to rotate, and the rotation of the guide tube 132 drives the spline shaft 131 to rotate. The rotation of the spline shaft 131 drives the first steering fork 16 to rotate. The rotation of the first steering fork 16 drives the cross universal joint 17, the second steering fork 18 and the drive shaft 19 to rotate in turn. The rotation of the drive shaft 19 drives the steering gear of the agricultural machine to rotate.

[0038] Reference Figure 3 , Figure 6 and Figure 7 A guide seat 31 is provided on the side wall of the vertical plate 3, the drive shaft 19 passes through the guide seat 31 and is rotatably connected to the guide seat 31, a first bearing 91 is provided between the inner wall of the lower pipe column 9 and the side wall of the spline shaft 131, a second bearing 122 is provided between the inner wall of the upper pipe column 12 and the side wall of the connecting shaft 134, and a cover 121 is provided on the end of the upper pipe column 12 away from the spline shaft 131 and is sleeved on the side wall of the connecting shaft 134. The side wall of the spline shaft 131 and the inner wall of the guide tube 132 are connected by a spline. This design improves the rotation stability of the connecting shaft 134 and the spline shaft 131.

[0039] Reference Figure 1 and Figure 3A limiting guide block 14 is provided on the side wall of the upper pipe column 12, and a guide plate 15 is provided on the side wall of the connecting frame 8. A through guide groove 151 matching the limiting guide block 14 is opened on the side wall of the guide plate 15. The guide plate 15 and the upper pipe column 12 are parallel to each other. This design limits the position of the upper pipe column 12 sliding along the side wall of the lower pipe column 9 by moving the limiting guide block 14 on the upper pipe column 12 along the guide groove 151 on the guide plate 15, thereby preventing the upper pipe column 12 from sliding sideways, thereby facilitating the adjustment of the height and accelerating the adjustment speed.

[0040] Reference Figure 5 and Figure 8 A spline groove 163 is provided at the end of the first steering fork 16, and the spline shaft 131 is placed inside the spline groove 163. A clamping groove 161 connected to the spline groove 163 is provided on the side wall of the first steering fork 16. A locking bolt 162 is provided on the side wall of the first steering fork 16, which penetrates the inside of the clamping groove 161 and is used to tighten the spline shaft 131. This design makes the clamping groove 161 smaller by using the locking bolt 162 to be threadedly connected to the first steering fork 16, so that the spline shaft 131 fits tightly with the spline groove 163, thereby facilitating the connection and fixing of the spline shaft 131 and the first steering fork 16, improving the stability of the connection, and facilitating disassembly.

[0041] Reference Figure 3 and Figure 4A second rotating column 81 is arranged between the connecting plate 1 and the connecting frame 8, a mounting groove 102 is provided on the top of the connecting plate 1, a pair of connecting plates 4 are symmetrically arranged at the bottom of the connecting plate 1, a third rotating column 41 is arranged between the pair of connecting plates 4, a mounting plate 5 is arranged on the side wall of the third rotating column 41, a rotating groove 51 is provided on the top of the mounting plate 5, a pressing block 20 is arranged inside the rotating groove 51, a first rotating shaft 52 penetrating the rotating groove 51 is arranged between the mounting plate 5 and the pressing block 20, a connecting frame 7 is arranged inside the connecting frame 8, a locking gas spring 6 connected to the connecting frame 7 and arranged inside the mounting groove 102 is arranged on the side wall of the mounting plate 5, a second rotating shaft 71 is arranged between the locking gas spring 6 and the connecting frame 7, a locking head 61 of the locking gas spring 6 is arranged inside the rotating groove 51, a driving component 2 for driving the pressing block 20 to apply force to the locking head 61 of the locking gas spring 6 so that the locking gas spring 6 locks or releases the connecting frame 8 and the connecting plate 1 is arranged inside the connecting plate 1, and the design is achieved by using The driving assembly 2 works to apply force to the pressure block 20, so that the pressure block 20 pushes the locking head 61 of the locking gas spring 6 to move inside the locking gas spring 6, so that the locking gas spring 6 loses the lock on the connecting frame 7, thereby losing the lock on the connecting frame 8, and then loses the lock between the connecting frame 8 and the connecting plate 1, and then applies force to the connecting shaft 13 connected to the steering wheel, so that the connecting shaft 13 drives the connecting frame 8 to rotate along the connecting frame 7 under the action of the second rotating column 81, and at the same time drives the connecting frame 7 to rotate along the locking gas spring 6 under the action of the second rotating shaft 71, thereby completing the adjustment of the front and rear rotation position of the steering wheel when in use. When the adjustment is completed, the driving assembly 2 stops applying force to the pressure block 20. At this time, the locking gas spring 6 continues to lock the connecting frame 8 and the connecting plate 1 after the adjusted position, thereby locking the adjusted position of the connecting shaft 13, and then locking the adjusted front and rear rotation position of the steering wheel when in use, which facilitates the adjustment of the front and rear rotation position of the steering wheel when in use.

[0042] Reference Figure 1 and Figure 2 A rotation limit groove 82 is provided on the side of the connecting frame 8 away from the lower pipe column 9, and a limit bolt 83 is provided on the side wall of the connecting plate 1 and is placed inside the rotation limit groove 82. When the connecting frame 8 rotates along the connecting frame 7 under the action of the second rotating column 81, the rotation position of the connecting frame 8 is limited under the action of the limit bolt 83 and the rotation limit groove 82.

[0043] Reference Figure 2 and Figure 3The driving assembly 2 includes a first rotating column 201 arranged inside the connecting plate 1, an adjusting foot pedal 203 is arranged on the side wall of the first rotating column 201, a torsion spring 202 sleeved on the side wall of the first rotating column 201 is arranged between the adjusting foot pedal 203 and the connecting plate 1, a mounting block 206 is arranged on the inner side wall of the connecting plate 1, a hook plate 204 is arranged on the side wall of the adjusting foot pedal 203, and a pull wire 205 is arranged inside the hook plate 204, which passes through the mounting block 206, the mounting plate 5 and the pressing block 20 in sequence. The pedal drives the first rotating column 201 to rotate, driving the torsion spring 202 to be in a compressed state, and at the same time drives the hook plate 204 to rotate and drive the pull wire 205 to move. The movement of the pull wire 205 drives the pressure block 20 to rotate inside the rotating groove 51 to press the locking head 61 of the locking gas spring 6. When pressing is not needed, stop stepping on the adjusting pedal 203, and the torsion spring 202 drives the adjusting pedal 203 to return to the initial position, so that the hook plate 204 drives the pull wire 205 to lose the pressure on the pressure plate. At this time, the locking head 61 of the locking gas spring 6 returns to the initial position.

[0044] Reference Figure 1 and Figure 2 A evasion groove 103 is provided on the top of the connecting plate 1 for evading the hook plate 204 and the pull wire 205, and a fixing bolt 2041 is provided between the hook plate 204 and the adjusting foot pedal 203. This design facilitates the connection and fixation between the hook plate 204 and the adjusting foot pedal 203 by using the fixing bolt 2041.

[0045] Reference Figure 4 and Fig. 9 A groove 21 matching the locking head 61 of the locking gas spring 6 is provided on one side of the pressure block 20 close to the locking gas spring 6 . This design facilitates applying force to the locking head 61 of the locking gas spring 6 by using the groove 21 .

[0046] Reference Figure 2 A fixing column 101 is provided on the side wall of the connecting plate 1, and a fixing threaded hole is opened inside the fixing column 101. A limiting plate 22 is provided on the side wall of the upper pipe column 12, and a sliding groove matching the side wall of the upper pipe column 12 is opened inside the limiting plate 22. A plurality of mounting holes are opened on the side wall of the limiting plate 22, which improves the rationality of the design.

[0047] Reference Figure 1-Figure 9As an embodiment of the utility model: when it is necessary to adjust the height of the steering wheel on the connecting shaft 13 during use, the staff applies force to the steering wheel on the connecting shaft 13, thereby driving the connecting shaft 134, the upper column 12, and the guide tube 132 to move as a whole close to one side of the connecting frame 8. During the movement, the connecting shaft 134 pushes the upper column 12 to slide along the side wall of the lower column 9 under the action of the limiting guide block 14 and the guide groove 151, preventing the upper column 12 from sliding sideways, speeding up the adjustment speed, and the connecting shaft 134 pushes the guide tube 132 to move closer to the side of the connecting frame 8. The inner wall of the guide tube 132 slides along the side wall of the spline shaft 131 and the side wall of the guide tube 132 slides along the inner wall of the lower column 9. At this time, the adjustment spring 133 is in a compressed state. After adjusting to a suitable position, the locking threaded rod 10 is threadedly connected to the support plate 11, thereby driving the locking threaded rod 10 to move downward and fit tightly against the side wall of the lower column 9, thereby completing the locking of the connection position between the upper column 12 and the lower column 9 to prevent the connection from loosening, facilitating the height adjustment of the upper column 12, and then adjusting the height of the steering wheel.

[0048] When it is necessary to adjust the front and rear rotation position of the steering wheel during use, the adjusting foot pedal 203 in the driving assembly 2 is stepped on to drive the first rotating column 201 to rotate, driving the torsion spring 202 to be in a compressed state, and at the same time driving the hook plate 204 to rotate and drive the pull wire 205 to move. The movement of the pull wire 205 drives the pressure block 20 to rotate inside the rotating groove 51 to press the locking head 61 of the locking gas spring 6, so that the locking head 61 of the locking gas spring 6 moves toward the inside of the locking gas spring 6, causing the locking gas spring 6 to lose the lock on the connecting frame 7, thereby losing the lock on the connecting frame 8, and then losing the lock between the connecting frame 8 and the connecting plate 1, and then force is applied to the connecting shaft 13 connected to the steering wheel, so that the connecting shaft 13 drives the connecting frame 8 to rotate along the connecting frame 7 under the action of the second rotating column 81. The connecting frame 7 is driven to rotate along the locking gas spring 6 under the action of the second rotating shaft 71, thereby completing the adjustment of the front and rear rotation position of the steering wheel when in use. When the adjustment is completed, stop stepping on the adjusting pedal 203, and the torsion spring 202 drives the adjusting pedal 203 to return to the initial position, so that the hook plate 204 drives the pull wire 205 to lose the pressure on the pressure plate, and the locking head 61 of the locking gas spring 6 returns to the initial position. At this time, the locking gas spring 6 continues to lock the connecting frame 8 and the connecting plate 1 after the adjustment position, thereby locking the adjusted position of the connecting shaft 13, and then locking the adjusted front and rear rotation position of the steering wheel when in use, which facilitates the adjustment of the front and rear rotation position of the steering wheel when in use. Among them, the locking gas spring 6 is a prior art, which improves the practicality of the utility model.

[0049] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0050] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An adjustable steering column for an agricultural machine, comprising: A connecting plate (1), wherein a vertical plate (3) is arranged at the bottom of the connecting plate (1), a connecting frame (8) is arranged on the side wall of the connecting plate (1), a lower pipe column (9) is arranged on the side wall of the connecting frame (8), a connecting shaft (13) penetrating the connecting frame (8) and connected to the steering wheel of the agricultural machine is arranged inside the lower pipe column (9), a first steering fork (16) is arranged at the end of the connecting shaft (13), a cross universal joint (17) is rotatably arranged on the inner wall of the first steering fork (16), a second steering fork (18) is rotatably arranged on the shaft end of the cross universal joint (17), and a driving shaft (19) penetrating the side wall of the vertical plate (3) and connected to the steering gear of the agricultural machine is arranged at the end of the second steering fork (18); It is characterized in that The side wall of the lower pipe column (9) is sleeved with an upper pipe column (12); The connecting shaft (13) comprises a guide tube (132) arranged inside the lower pipe column (9); a connecting shaft (134) rotatably connected to the upper pipe column (12) is arranged at one end of the guide tube (132); an adjusting spring (133) connected to the end of the connecting shaft (134) is arranged inside the guide tube (132); a spline shaft (131) penetrating the connecting frame (8) and placed inside the guide tube (132) and connected to the adjusting spring (133) is rotatably arranged inside the lower pipe column (9); the spline shaft (131) is connected to the first steering fork (16); The side wall of the upper pipe column (12) is provided with a support plate (11), and the support plate (11) is internally provided with a locking threaded rod (10) which penetrates the side wall of the upper pipe column (12) and contacts the side wall of the lower pipe column (9).

2. The adjustable steering column for agricultural machinery according to claim 1, characterized in that: A guide seat (31) is provided on the side wall of the vertical plate (3); the drive shaft (19) passes through the guide seat (31) and is rotatably connected to the guide seat (31); a first bearing (91) is provided between the inner wall of the lower tube column (9) and the side wall of the spline shaft (131); a second bearing (122) is provided between the inner wall of the upper tube column (12) and the side wall of the connecting shaft (134); a cover (121) sleeved on the side wall of the connecting shaft (134) is provided at one end of the upper tube column (12) away from the spline shaft (131); and the side wall of the spline shaft (131) and the inner wall of the guide tube (132) are connected via a spline.

3. The adjustable steering column for agricultural machinery according to claim 1, characterized in that: The side wall of the upper pipe column (12) is provided with a limit guide block (14), the side wall of the connecting frame (8) is provided with a guide plate (15), the side wall of the guide plate (15) is provided with a through guide groove (151) matching the limit guide block (14), and the guide plate (15) and the upper pipe column (12) are parallel to each other.

4. The adjustable steering column for agricultural machinery according to claim 1, characterized in that: A spline groove (163) is provided at the end of the first steering fork (16), the spline shaft (131) is arranged inside the spline groove (163), a clamping groove (161) connected to the spline groove (163) is provided on the side wall of the first steering fork (16), and a locking bolt (162) is provided on the side wall of the first steering fork (16) that passes through the clamping groove (161) and is used to tighten the spline shaft (131).

5. The adjustable steering column for agricultural machinery according to claim 1, characterized in that: A second rotating column (81) is arranged between the connecting plate (1) and the connecting frame (8); a mounting groove (102) is arranged at the top of the connecting plate (1); a pair of connecting plates (4) are symmetrically arranged at the bottom of the connecting plate (1); a third rotating column (41) is arranged between the pair of connecting plates (4); a mounting plate (5) is arranged on the side wall of the third rotating column (41); a rotating groove (51) is arranged at the top of the mounting plate (5); a pressing block (20) is arranged inside the rotating groove (51); a first rotating shaft (52) penetrating the rotating groove (51) is arranged between the mounting plate (5) and the pressing block (20); the connecting frame ( 8) is provided with a connecting frame (7) inside, the side wall of the mounting plate (5) is provided with a locking gas spring (6) connected to the connecting frame (7) and placed inside the mounting groove (102), a second rotating shaft (71) is provided between the locking gas spring (6) and the connecting frame (7), the locking head (61) of the locking gas spring (6) is placed inside the rotating groove (51), and a driving component (2) is provided inside the connecting plate (1) for driving the pressure block (20) to apply force to the locking head (61) of the locking gas spring (6) so that the locking gas spring (6) locks or releases the connecting frame (8) and the connecting plate (1).

6. The adjustable steering column for agricultural machinery according to claim 5, characterized in that: A rotation limiting groove (82) is provided on a side of the connecting frame (8) away from the lower pipe column (9), and a limiting bolt (83) disposed inside the rotation limiting groove (82) is provided on the side wall of the connecting plate (1).

7. The adjustable steering column for agricultural machinery according to claim 5, characterized in that: The driving assembly (2) comprises a first rotating column (201) arranged inside the connecting plate (1); an adjusting pedal (203) is arranged on the side wall of the first rotating column (201); a torsion spring (202) is arranged between the adjusting pedal (203) and the connecting plate (1) and is sleeved on the side wall of the first rotating column (201); a mounting block (206) is arranged on the inner side wall of the connecting plate (1); a hook plate (204) is arranged on the side wall of the adjusting pedal (203); a pull wire (205) is arranged inside the hook plate (204) and passes through the mounting block (206), the mounting plate (5) and is connected to the pressing block (20) in sequence.

8. The adjustable steering column for agricultural machinery according to claim 7, characterized in that: The top of the connecting plate (1) is provided with an escape groove (103) for escaping the hook plate (204) and the pull wire (205), and a fixing bolt (2041) is provided between the hook plate (204) and the adjusting foot pedal (203).

9. The adjustable steering column for agricultural machinery according to claim 5, characterized in that: A groove (21) matching the locking head (61) of the locking gas spring (6) is formed on one side of the pressure block (20) close to the locking gas spring (6).

10. The adjustable steering column for agricultural machinery according to claim 1, characterized in that: The side wall of the connecting plate (1) is provided with a fixing column (101), a fixing threaded hole is provided inside the fixing column (101), the side wall of the upper pipe column (12) is provided with a limiting plate (22), a sliding groove matching the side wall of the upper pipe column (12) is provided inside the limiting plate (22), and the side wall of the limiting plate (22) is provided with a plurality of mounting holes.

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