Agricultural machine cab and agricultural machine

Abstract

The agricultural machine cab comprises a cab body, a plurality of sleeping berth mounting positions are arranged in the cab body, the sleeping berth mounting positions are located at the same horizontal height, and the distance between the sleeping berth mounting positions and the inner surface of the top wall of the cab body is not smaller than 850 mm; a functional part is arranged in the cab body and can be not higher than the horizontal plane where the sleeping berth mounting position is located after being disassembled or folded or compressed. According to the agricultural machine cab, through structural optimization of key parts, under the condition that the height of an original cab is not changed, utilization of the internal space of the cab is maximized, normal operation usability is met, and sleeping berth building space usability is also met. Through structural improvement of functional parts, the space of the cab is further expanded and utilized for the second time so as to meet the requirement for building sleeping berths of cross-regional operation users of the harvester, the problem of utilization of the space of the cab is solved, living expenses of the users are saved, and the market competitiveness of products is improved.

Description

Technical Field

[0001] This invention relates to the technical field of large vehicle cabs, specifically to an agricultural machinery cab and the agricultural machinery itself. Background Technology

[0002] Harvesting machinery operations are mostly cross-regional, and typically involve two workers (usually a father and son or a husband and wife team). To minimize living expenses, these workers often need to rest in the cab. Due to the limited space in existing cabs, maximizing the effective use of that space has become a major challenge.

[0003] Given the unique characteristics of cross-regional operations in China, the cab system must meet both normal operational needs and the requirements for sleeper berth setup and rest. Furthermore, the connected sleeper berths must provide ample space for users to enter, lie down, and sit. This places higher demands on the cab system and presents unprecedented challenges. Key components within the cab include the seat, armrest box, electric control lever, gear shift control box, and steering gear. These are among the taller protrusions in the cab, directly impacting the sleeper berth height. Currently, the height from the sleeper berth installation surface to the top liner is only 700mm, failing to meet the 850mm space requirement (making it impossible for adults to sit upright), resulting in poor user comfort. Summary of the Invention

[0004] In order to solve one or more technical problems existing in the prior art, the present invention provides an agricultural machinery cab and agricultural machinery.

[0005] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: The present invention provides an agricultural machinery cab, including a cab body, wherein the cab body is provided with a plurality of sleeper installation positions, the plurality of sleeper installation positions are located at the same horizontal height and the distance between them and the inner surface of the top wall of the cab body is not less than 850mm; the cab body has functional components, the functional components being able to be disassembled, folded or compressed without being higher than the horizontal plane where the sleeper installation positions are located.

[0006] The beneficial effects of this invention are as follows: The agricultural machinery cab of this invention, through structural optimization of key components, maximizes the utilization of the internal space of the cab without changing the original cab height. It not only meets the needs of normal operation but also provides space for a sleeper berth. This invention further expands and utilizes the cab space through functional component structural improvements, addressing the sleeper berth needs of harvester operators working across regions. This solution not only solves the problem of cab space utilization but also saves users' living expenses and enhances the product's market competitiveness.

[0007] Based on the above technical solution, the present invention can be further improved as follows.

[0008] Furthermore, it also includes a sleeper berth, which can be slidably installed above the sleeper berth mounting position and can abut against the sleeper berth mounting position for limiting; or, the sleeper berth can be folded and installed on the rear side wall of the cab body and can abut against the sleeper berth mounting position for limiting when opened; or the sleeper berth is detachably connected to the sleeper berth mounting position.

[0009] Furthermore, the functional components include at least one of the following: the main seat, steering gear, control box, gear shift lever, and armrest box; the distance between the horizontal plane where the sleeper berth is installed and the cab floor mat is no greater than 650mm.

[0010] The beneficial effect of adopting the above-mentioned further solution is that the structure of any one of the functional components such as the main seat, steering gear, control box, gear shift lever and armrest box can be configured to meet the space requirements for sleeper berth construction.

[0011] Furthermore, the steering gear includes a steering wheel, a first inner tube, a second inner tube, and a support rod. The lower end of the support rod is fixed to the driver's cab floor mat in front of the driver's seat. The steering wheel is detachably connected to the upper end of the first inner tube. The lower end of the first inner tube is hinged to the upper end of the second inner tube, and the lower end of the second inner tube is hinged to the support rod. The first inner tube and the second inner tube are connected by a first angle adjustment mechanism, and the second inner tube is connected to the support rod by a second angle adjustment mechanism.

[0012] The beneficial effect of adopting the above-mentioned further solution is that by setting an angle adjustment mechanism, the steering gear angle can be adjusted, and the steering gear can be bent as much as possible when it is not suitable, so as to avoid occupying too much height space.

[0013] Furthermore, the upper end of the first inner tube is connected to an outer tube via a height adjustment mechanism, and the steering wheel is detachably connected to the upper end of the outer tube. The lower end of the outer tube is sleeved on the upper end of the first inner tube, and the lower end of the first inner tube and the upper end of the second inner tube are hinged together via a first hinge shaft. A clamp is fixed to the lower end of the outer tube and sleeved on the outside of the first inner tube. Two ear plates are fixed to the outer surface of the opening side of the clamp, and a height adjustment mechanism is connected to the two ear plates to tighten or loosen the first inner tube by rotation. The side walls of the first inner tube and the second inner tube are connected via a first angle adjustment mechanism. One end of the height adjustment mechanism is connected to the upper end of a pull cable, and the lower end of the pull cable is connected to a first locking structure on the first angle adjustment mechanism, which can pull or loosen the first locking structure to unlock or lock the first angle adjustment mechanism.

[0014] The beneficial effects of adopting the above-mentioned further solution are as follows: by setting up a height adjustment mechanism, a first angle adjustment mechanism, and a second angle adjustment structure, the height can be adjusted by loosening or loosening the clamp through the height adjustment mechanism. When adjusting the height, the cable can be pulled at the same time, which will drive the first locking structure to unlock or lock the first angle adjustment mechanism. This allows for the joint adjustment of height and angle, enabling simultaneous adjustment in both the front-rear and rear-mounted dimensions as well as the up-down and rear-mounted dimensions. Users can adjust the steering wheel to a suitable position according to their own driving needs.

[0015] Furthermore, the height adjustment mechanism includes an adjustment rod, a first toothed disc, and a second toothed disc. The two ear plates are respectively the first ear plate and the second ear plate. The adjustment rod is rotatably connected to the first ear plate. The first toothed disc is fixed to the outer side of the second ear plate. A pull plate for connecting the upper end of the pull cable is fixed to one end of the adjustment rod extending out of the first ear plate. A second toothed disc is fixed to the outer side wall of the section of the adjustment rod extending out of the second ear plate. The second toothed disc is fixed to the adjustment rod and arranged opposite to the first toothed disc. The rotation of the adjustment rod allows the second toothed disc to adapt to and mesh with the first toothed disc or to be misaligned, thereby moving the two ear plates further apart or closer together.

[0016] A bearing is mounted on the first ear plate, and the adjusting rod is fixedly connected to the inner ring of the bearing.

[0017] The beneficial effects of adopting the above-mentioned further solution are as follows: By setting an adjusting rod, a first gear plate, and a second gear plate, rotating the adjusting rod in the forward direction causes the second gear plate on the adjusting rod to disengage from the first gear plate. The two ear plates are no longer under force and move away from each other. The clamp does not tighten the first inner tube, and the height between the outer tube and the first inner tube can be adjusted. At the same time, the pull plate on the adjusting rod pulls the pull line to move, which drives the first angle adjustment mechanism to unlock and realize angle adjustment. Rotating the adjusting rod in the reverse direction causes the second gear plate on the adjusting rod to mesh with the first gear plate. One ear plate is forced to move closer to the other ear plate, the clamp tightens the second inner tube, and the outer tube and the first inner tube are locked. At the same time, the pull plate on the adjusting rod resets, the first angle adjustment mechanism is locked, and angle adjustment cannot be performed.

[0018] Furthermore, a clamping buffer gap is provided between the clamp and the outer tube, the clamping buffer gap extends along the circumference of the outer tube, and one end of the clamping buffer gap is connected to the opening between the two ear plates; a first spring is pressed between the two ear plates, and the first spring is sleeved on the adjusting rod.

[0019] The beneficial effect of adopting the above-mentioned further solution is that by setting a clamping buffer gap, the clamp can be slightly deformed during operation to achieve a clamping effect.

[0020] Furthermore, the first angle adjustment mechanism includes a first locking gas spring, the locking end of the first locking gas spring is hinged to the outer side of the lower end of the first inner tube through a second hinge shaft, and the main body structure end of the first locking gas spring is hinged to the outer side wall of the second inner tube through a third hinge shaft. The second hinge shaft and the third hinge shaft are both arranged parallel to the first hinge shaft.

[0021] The first locking structure includes a first locking lever, the locking end of the first locking gas spring is provided with a first locking hole, the first locking lever is hinged in the first locking hole, one end of the first locking lever is connected to the lower end of the pull wire, and the other end of the first locking lever is arranged correspondingly to the first locking head of the first locking gas spring.

[0022] The beneficial effect of adopting the above-mentioned further solution is that by setting a first locking lever, the first locking lever can be used in conjunction with the first locking gas spring to realize the locking and unlocking of the first locking gas spring.

[0023] Furthermore, the lower end of the second inner tube is hinged to the support plate at the upper end of the support rod via a fourth hinge shaft, and the two ends of the second angle adjustment mechanism are respectively hinged to the outer wall of the second inner tube and the upper end of the support rod via a fifth hinge shaft and a sixth hinge shaft. The fourth hinge shaft, the fifth hinge shaft and the sixth hinge shaft are all arranged parallel to the first hinge shaft.

[0024] A foot pedal is connected to the upper end of the support rod. The foot pedal is rotatably connected to the support plate at the upper end of the support rod via a pedal shaft. One end of the pedal shaft, which extends into the support plate, is connected to a pull rod. A limiting pin is fixed on the support plate to limit the pull rod. One end of the pull rod is connected to the pedal shaft, and the other end of the pull rod is connected to the second locking structure on the second angle adjustment mechanism via a second spring. The pull rod can pull or release the second locking structure to unlock or lock the second angle adjustment mechanism.

[0025] Furthermore, the second angle adjustment mechanism includes a second locking gas spring, the main structure end of the second locking gas spring is hinged to the outer wall of the second inner tube through a fifth hinge axis, and the locking end of the second locking gas spring is hinged to the upper end of the support rod through a sixth hinge axis.

[0026] The second locking end of the second locking gas spring has a second locking hole. The second locking structure includes a second locking lever. The middle part of the second locking lever is hinged in the second locking hole. One end of the second locking lever is connected to the upper end of the second spring. The other end of the second locking lever is arranged correspondingly to the second locking head of the second locking gas spring.

[0027] The beneficial effect of adopting the above-mentioned further solution is that by setting a second locking lever, it is convenient to cooperate with the second locking gas spring to realize the unlocking or locking of the second locking gas spring.

[0028] Furthermore, a first U-shaped connector is fixed to the lower end of the first inner tube, a second U-shaped connector and a third U-shaped connector are fixed to the upper and lower ends of the second inner tube respectively, and a fourth U-shaped connector is fixed to the outer wall of the second inner tube.

[0029] The first U-shaped connector and the second U-shaped connector are hinged together by a first hinge axis, and the third U-shaped connector and the support plate are hinged together by a fourth hinge axis; the lower end of the first angle adjustment mechanism is hinged together with the fourth U-shaped connector by a third hinge axis, and the upper end of the second angle adjustment mechanism is hinged together with the fourth U-shaped connector by a fifth hinge axis. The third hinge axis is located diagonally above the fifth hinge axis and is arranged close to the second inner tube.

[0030] The beneficial effect of adopting the above-mentioned further solution is that by setting U-shaped connectors, it is convenient to hinge the various tubes together.

[0031] Furthermore, the steering wheel is detachably connected to the upper end of the first inner tube via a first quick-release mechanism. The first quick-release mechanism includes an upper quick-release component, a lower quick-release component, and a quick-release mounting plate for connecting to the steering wheel and the upper end of the first inner tube. The upper quick-release component and the lower quick-release component are detachably connected, and the lower quick-release component is fixedly connected to the quick-release mounting plate.

[0032] The beneficial effects of adopting the above-mentioned further solution are: when setting up the sleeper berth, the user can quickly remove the steering wheel through the first quick-release mechanism to ensure the space for the sleeper berth, and can also quickly reinstall it without affecting the user's operation, thus meeting the sleeper berth setup needs of users working across regions.

[0033] Furthermore, the quick-release assembly includes: a first sleeve, a second sleeve, a first elastic element, and a plurality of balls. The first sleeve is sleeved on the outside of the second sleeve. The inner wall of the second sleeve is provided with a plurality of first mounting holes spaced apart along the circumference. The plurality of balls are respectively installed in the plurality of first mounting holes. The bottom inner diameter of the first sleeve is larger than the top inner diameter of the first sleeve. The two ends of the first elastic element are respectively connected to the first sleeve and the second sleeve.

[0034] The lower component of the quick-release device includes a third sleeve. The outer wall of the third sleeve is provided with a plurality of second mounting holes that are adapted to the ball. The bottom of the third sleeve is provided with a flange for connecting to the quick-release device mounting plate. The outer diameter of the third sleeve is smaller than the inner diameter of the second sleeve. The second sleeve is detachably sleeved on the outside of the third sleeve.

[0035] The beneficial effect of adopting the above-mentioned further solution is that the upper component and the lower component of the quick release device are connected together by an internal ball-shaped snap-fit ​​structure. When the steering wheel needs to be removed, both hands should be used to pry up the outer shell of the upper component of the quick release device to disengage the upper and lower parts, thereby achieving quick disassembly. When in use, the upper component of the quick release device can be directly snapped onto the first inner tube upper shaft assembly component.

[0036] Furthermore, the bottom inner surface of the first sleeve is provided with a first conical surface that is larger at the bottom and smaller at the top, and a first retaining ring that limits the movement of the ball is fixed on the bottom inner surface of the first sleeve. The first retaining ring is located below the first conical surface.

[0037] Furthermore, the gear shift lever includes an upper gear shift lever and a lower gear shift lever. The lower end of the upper gear shift lever is provided with a socket. The upper end of the lower gear shift lever can be inserted into the socket and is detachably connected to the upper end of the lower gear shift lever through a second quick-release mechanism. The lower end of the lower gear shift lever is installed on the driver's cab floor mat on the side of the driver's seat.

[0038] The beneficial effects of adopting the above-mentioned further solutions are: the gear shift lever structure of the present invention is reasonably and ingeniously designed, which can quickly realize the quick assembly and disassembly of the upper and lower levers of the gear shift lever, making operation very convenient.

[0039] Furthermore, the second quick-release mechanism includes a knurled sleeve, a second elastic element, multiple balls, and a second retaining ring. The lower outer surface of the upper end of the shift lever is provided with a first annular groove and a second annular groove arranged in a stepped manner. The diameter of the first annular groove is smaller than the diameter of the second annular groove. The knurled sleeve is fitted onto the second annular groove. The inner sidewall of the knurled sleeve is provided with a limiting part that matches the first annular groove. The second elastic element is connected between the end wall of the first annular groove and one end wall of the limiting part.

[0040] The inner surface of the lower end of the knurled sleeve defines a receiving groove between the limiting part and the knurled sleeve. The side wall of the second annular groove is provided with a plurality of ball holes that penetrate the side wall in the circumferential direction. Balls are installed in the ball holes. The outer side wall of the upper end of the shift lever is provided with a plurality of fitting grooves that correspond to and fit into the ball in a one-to-one manner in the circumferential direction.

[0041] The knurled sleeve is used to move under external force to abut against the end wall of the first annular groove, compress the second elastic member, and cause the ball to move along the limiting part into the receiving groove; or after the external force is removed, the knurled sleeve drives the ball to move inward into the fitting groove under the elastic force of the second elastic member.

[0042] Furthermore, the lower end of the limiting part is a second conical surface that is larger at the bottom and smaller at the top, and a second retaining ring for limiting the ball is fixed on the lower side wall of the second annular groove or the lower inner surface of the knurled sleeve.

[0043] Furthermore, the distance between the inner wall of the receiving groove and the second annular groove is smaller than the diameter of the ball; the inner opening of the ball hole is narrowed in a trumpet shape and its size is smaller than the diameter of the ball.

[0044] Furthermore, the insertion hole includes a first positioning hole and a second engaging hole coaxially arranged. The diameter of the second engaging hole is larger than the diameter of the first positioning hole, and the second engaging hole extends to one end of the upper lever of the shift lever. Correspondingly, one end of the lower lever of the shift lever is coaxially provided with a first positioning post with a smaller diameter. The first positioning post is inserted into the first positioning hole, and one end of the lower lever of the shift lever is inserted into the second engaging hole. The first positioning post and one end of the lower lever of the shift lever form a tapered transition.

[0045] Furthermore, the armrest box is provided with a two-dimensional adjustment frame that can adjust the height of the armrest box. When the two-dimensional adjustment frame is in the initial position and the adjusted position, the height difference of the armrest box is (50~150)mm.

[0046] The height of the control box is the same as the height of the passenger seat in the driver's cab.

[0047] The main seat is mounted on a support on the cab floor mat via a shock-absorbing mechanism. The main seat is provided with a limiting strap on the left or right side, and the limiting strap is detachably connected to a hook on the support.

[0048] The present invention also provides an agricultural machine, including a vehicle body and an agricultural machine cab as described above, wherein the agricultural machine cab is installed on the front side of the vehicle body.

[0049] The beneficial effects of the present invention are: the agricultural machinery of the present invention can further expand and utilize the cab space to solve the sleeper construction needs of users of harvesters operating across regions. This solution not only solves the problem of cab space utilization, but also saves users' living expenses and enhances the product's market competitiveness. Attached Figure Description

[0050] Figure 1 This is a three-dimensional structural schematic diagram of the multi-stage composite adjustable steering mechanism for agricultural machinery of the present invention;

[0051] Figure 2 for Figure 1 Enlarged structural diagram of section A in the middle;

[0052] Figure 3 for Figure 1Enlarged structural diagram of section B in the middle;

[0053] Figure 4 This is a schematic diagram of the split structure of the multi-stage composite adjustable steering mechanism for agricultural machinery of the present invention;

[0054] Figure 5 for Figure 4 Enlarged structural diagram of the middle section;

[0055] Figure 6 This is a three-dimensional structural schematic diagram of the second angle adjustment mechanism of the present invention;

[0056] Figure 7 This is a schematic diagram of the structure of the handle and the outer sheath of the present invention.

[0057] Figure 8 This is a schematic diagram of the front view of the gear shift lever of the present invention;

[0058] Figure 9 This is an exploded structural diagram of the gear shift lever of the present invention;

[0059] Figure 10 This is a cross-sectional view of the second quick-release mechanism of the gear shift lever of the present invention. Figure 1 ;

[0060] Figure 11 This is a cross-sectional view of the second quick-release mechanism of the gear shift lever of the present invention. Figure 2 ;

[0061] Figure 12 This is a cross-sectional view of the gear shift lever in its split configuration according to the present invention.

[0062] Figure 13 This is a three-dimensional exploded structural diagram of the assembly of the steering wheel and outer tube on the steering gear of the present invention via the first quick-release mechanism;

[0063] Figure 14 This is a three-dimensional structural diagram of the assembly of the steering wheel and outer tube on the steering gear of the present invention via a first quick-release mechanism;

[0064] Figure 15 This is a schematic diagram of the separate structure of the outer tube and the quick-release mounting plate of the present invention;

[0065] Figure 16 This is a schematic diagram of the structure of the outer tube and quick-release mounting plate after assembly of the present invention;

[0066] Figure 17 This is a schematic diagram of the separate structure of the lower component of the quick-release device and the quick-release device mounting plate of the present invention;

[0067] Figure 18 This is a schematic diagram of the structure of the quick-release device lower component and the quick-release device mounting plate after assembly according to the present invention;

[0068] Figure 19 This is a schematic diagram of the separate structure of the steering wheel horn cover and the steering wheel of the present invention;

[0069] Figure 20 This is a schematic diagram of the separate structure of the steering wheel and the quick-release assembly of the present invention;

[0070] Figure 21 This is a schematic cross-sectional view of the first quick-release mechanism of the present invention. Figure 1 ;

[0071] Figure 22 This is a schematic cross-sectional view of the first quick-release mechanism of the present invention. Figure 2 ;

[0072] Figure 23 This is a schematic diagram of the assembly state of the steering wheel and outer tube of the present invention;

[0073] Figure 24 This is a schematic diagram showing the disassembled state of the steering wheel and outer tube of the present invention;

[0074] Figure 25 Schematic diagram of the internal three-dimensional structure of the existing driver's cab Figure 1 ;

[0075] Figure 26 Schematic diagram of the internal three-dimensional structure of the existing driver's cab Figure 2 ;

[0076] Figure 27 This is a schematic diagram of the internal side view of the existing driver's cab;

[0077] Figure 28 This is a schematic diagram of the main structure of the driver's cab of the present invention;

[0078] Figure 29 for Figure 28 A schematic diagram of the AA cross-sectional structure;

[0079] Figure 30 This is a height comparison diagram of the steering gear before and after adjustment according to the present invention;

[0080] Figure 31 This is a comparison diagram of the armrest box height before and after adjustment according to the present invention;

[0081] Figure 32 This is a comparison diagram of the height of the gear shift lever before and after adjustment according to the present invention;

[0082] Figure 33 This is a schematic diagram showing the height of a conventional control box.

[0083] Figure 34 This is a schematic diagram showing the height of the control box of the present invention;

[0084] Figure 35 This is a three-dimensional structural diagram of the main seat of the present invention;

[0085] Figure 36 This is a schematic diagram showing the height comparison of the main seat before and after compression according to the present invention.

[0086] The attached diagram lists the components represented by each number as follows:

[0087] 100. First inner tube; 101. Second inner tube; 102. Outer tube; 103. Clamp; 104. First hinge pin; 105. Second hinge pin; 106. Third hinge pin; 107. Fourth hinge pin; 108. Fifth hinge pin; 109. First ear plate; 110. Second ear plate; 111. Adjusting rod; 112. First gear plate; 113. Second gear plate; 114. Pull wire plate; 115. Threaded section; 116. Handle; 117. Nut; 118. First self-locking nut; 119. Second self-locking nut; 120. Bearing; 121. Pull wire; 122. First spring; 123. Clamping buffer gap; 124. First locking mechanism. 125. Gas spring; 126. First locking lever; 127. First locking hole; 128. Second locking gas spring; 129. Support rod; 130. Support plate; 131. Pull rod; 132. Pedal shaft; 133. Foot pedal; 134. Second spring; 135. Second locking lever; 136. Limiting pin; 137. Second locking hole; 138. First U-shaped connector; 139. Second U-shaped connector; 140. Fourth U-shaped connector; 142. Fifth U-shaped connector; 143. Bushing; 144. Sixth hinge shaft; 145. Hand grip section; 146. Limiting pin; 147. Outer sheath.

[0088] 200. Steering wheel horn cover; 201. First screw; 202. Steering wheel; 203. Upper quick-release assembly; 204. Second screw; 205. Lower quick-release assembly; 206. Mounting screw assembly; 207. Quick-release mounting plate; 209. First sleeve; 210. Second sleeve; 211. First elastic element; 212. Ball; 213. First conical surface; 214. First retaining ring;

[0089] 400. Cab body; 401. Sleeper berth; 402. Cab floor mat; 403. Main seat; 404. Steering gear; 405. Control box; 406. Passenger seat; 407. Gear shift lever; 408. Armrest box; 409. Shock absorption mechanism; 410. Limiting strap; 411. Hook; 412. Support;

[0090] 1. Upper gear shift lever; 2. Lower gear shift lever; 3. Second quick-release mechanism; 11. Insertion hole; 12. First annular groove; 13. Second annular groove; 21. Fitting groove; 31. Knurled sleeve; 32. Second elastic element; 33. Ball bearing; 34. Limiting element; 311. Limiting part; 312. Receiving groove; 4. Ball bearing hole. Detailed Implementation

[0091] The principles and features of the present invention are described below. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0092] Example 1

[0093] like Figures 1 to 36 As shown, an agricultural machinery cab of this embodiment includes a cab body 400, which has multiple berth installation positions. The multiple berth installation positions are located at the same horizontal height and the distance A between them and the inner surface of the top wall of the cab body 400 is not less than 850mm. The cab body 400 has functional components that can be disassembled, folded or compressed without rising above the horizontal plane where the berth installation positions are located.

[0094] like Figure 28 and Figure 29 As shown, an optional embodiment of an agricultural machinery cab includes a sleeper 401, which is slidably mounted above the sleeper mounting position and can abut against the sleeper mounting position for limiting; or, the sleeper is foldable and mounted on the rear side wall of the cab body 400 and can abut against the sleeper mounting position for limiting when opened; or the sleeper 401 is detachably connected to the sleeper mounting position.

[0095] Optionally, the functional components include at least one of the following: main seat 403, steering gear 404, control box 405, gear shift lever 407, and armrest box 408; the distance between the horizontal plane where the sleeper berth is installed and the cab floor mat 402 is no greater than 650mm. The structure of any one of these functional components—main seat, steering gear, control box, gear shift lever, and armrest box—can be configured to meet the space requirements for sleeper berth construction. Folding, disassembly, or compression of these functional components can be achieved using existing common structures. This embodiment and the following embodiments provide several preferred solutions.

[0096] Among them, optional, such as Figure 31As shown, regarding the armrest box, the armrest box 408 is provided with a two-dimensional adjustment frame that can adjust the height of the armrest box 408. When the two-dimensional adjustment frame is in the initial position and the adjusted position, the height difference D of the armrest box 408 is (50~150) mm, and can be selected as 60 mm, 80 mm, 100 mm, 120 mm, 140 mm, etc. The specific adjustment structure of the armrest box 408 can refer to the previously authorized patent (CN202122622918.8 A vehicle armrest box driver's seat and agricultural vehicle). The armrest box height adjustment mechanism of this embodiment is the same as that patent. In this embodiment, the length of the parallel arm (i.e., the front adjustment rod and the rear adjustment rod) and the position of the push-pull rod can be adjusted to increase the downward adjustment stroke of the armrest box. This embodiment can increase the adjustment stroke of the armrest box.

[0097] Further optionally, the existing control box 405 is higher than the height of the passenger seat 406 in the driver's cab, such as... Figure 33 As shown. Figure 34 As shown, in this embodiment, the height F of the control box 405 is flush with the height of the passenger seat 406 in the driver's cab. This allows for reasonable arrangement of internal components, such as increasing the width or length of the control box, thereby lowering its height. The height of the control box 405 also limits the berth height space to some extent, especially for users working across areas, where accompanying personnel need to build a small berth for rest at the passenger seat location. In this case, the height of the control box restricts the berth height space. The newly developed control box has its upper surface flush with the passenger seat cushion, reducing the overall height to 450mm, thus providing sufficient space for the passenger seat location (which can also be converted into a small berth).

[0098] Optional, such as Figure 35 and Figure 36As shown, the main seat 403 is mounted on the support 412 of the cab floor mat 402 via a shock-absorbing mechanism 409. The main seat 403 has a limiting strap 410 on either its left or right side, and the limiting strap 410 is detachably connected to a hook 411 on the support 412. The main seat is the largest functional component in the cab system. When the main seat is adjusted to its lowest and softest position using a ratchet adjustment handle, the seat can continue to lower when the driver sits on it. After the driver leaves, the seat returns to its original position due to the internal tension spring mechanism. The limiting strap is then used to hook the seat to the hook position, and tightening the limiting strap locks the seat in its lowest position. There are various types of shock absorption mechanisms, all of which are commonly used existing mechanisms. They are mainly divided into mechanical shock absorption and airbag shock absorption. Mechanical shock absorption is further divided into adjustable-level mechanical shock absorption and stepless adjustable mechanical shock absorption. This embodiment describes stepless adjustable mechanical shock absorption, which allows for stepless adjustment of the shock absorber height, but cannot be locked to the lowest position and requires a limit strap. Adjustable-level mechanical shock absorption has an independent height adjustment function; by changing the level, it can be directly adjusted to the lowest position. Airbag shock absorption achieves height changes through the inflation and deflation of the airbag; by using the airbag adjustment handle to release the airbag, the seat will naturally lower to the lowest position. Adjustable mechanical shock absorption and airbag shock absorption can achieve the lowest height adjustment without the need for external objects, while stepless adjustable mechanical shock absorption requires external mechanical limiters to be mechanically limited to the lowest position.

[0099] This embodiment is based on the above-mentioned structural optimization or product upgrade of the functional components in the cab, which maximizes the secondary expansion and utilization of the cab space. The optimized sleeper space has a height of ≥850mm (e.g., 900mm) from the sleeper installation surface to the inner top liner and a height of ≤650mm from the sleeper installation surface to the floor mat, which meets the needs of cross-area operation users for entering, lying down, and sitting.

[0100] The agricultural machinery cab in this embodiment maximizes the use of internal space without changing the original cab height through structural optimization of key components. This not only meets the needs of normal operation but also provides space for a sleeper berth. Through functional component structural improvements, this embodiment further expands and utilizes the cab space to address the sleeper berth needs of users operating harvesters across different regions. This solution not only solves the cab space utilization problem but also saves users' living expenses and enhances the product's market competitiveness.

[0101] Example 2

[0102] Based on Embodiment 1, this embodiment provides a preferred solution for a steering gear. For example... Figures 1-6As shown, the steering gear 404 in this embodiment includes a steering wheel 202, a first inner tube 100, a second inner tube 101, and a support rod 128. The lower end of the support rod 128 is fixed to the driver's cab floor mat 402 in front of the driver's seat 403. The steering wheel 202 is detachably connected to the upper end of the first inner tube 100. The lower end of the first inner tube 100 is hinged to the upper end of the second inner tube 101, and the lower end of the second inner tube 101 is hinged to the support rod 128. The first inner tube 100 and the second inner tube 101 are connected by a first angle adjustment mechanism, and the second inner tube 101 is connected to the support rod 128 by a second angle adjustment mechanism. By setting the angle adjustment mechanism, the steering gear angle can be adjusted, and the steering gear can be bent as much as possible when it is not in use, avoiding occupying too much height space.

[0103] The first angle adjustment mechanism and the second angle adjustment structure in this embodiment can adopt existing structures.

[0104] Example 3

[0105] Based on Embodiment 2, this embodiment provides a preferred structure for a steering mechanism.

[0106] like Figures 1-6 As shown, the upper end of the first inner tube 100 is connected to an outer tube 102 via a height adjustment mechanism. The steering wheel 202 is detachably connected to the upper end of the outer tube 102. The lower end of the outer tube 102 is sleeved on the upper end of the first inner tube 100. The lower end of the first inner tube 100 is hinged to the upper end of the second inner tube 101 via a first hinge pin 104. A clamp 103 is fixed to the lower end of the outer tube 102 and sleeved on the outside of the first inner tube 100. Two ear plates are fixed to the outer surface of the opening side of the clamp 103. A height adjustment mechanism is connected to the two ear plates to tighten or loosen the first inner tube 100 by rotation. The side walls of the first inner tube 100 and the second inner tube 101 are connected via a first angle adjustment mechanism. One end of the height adjustment mechanism is connected to the upper end of a pull cable 121, and the lower end of the pull cable 121 is connected to a first locking structure on the first angle adjustment mechanism. The first locking structure can be pulled or loosened to unlock or lock the first angle adjustment mechanism. By setting up a height adjustment mechanism, a first angle adjustment mechanism, and a second angle adjustment structure, the height can be adjusted by loosening or loosening the clamp through the height adjustment mechanism. When adjusting the height, the cable can be pulled at the same time, which will drive the first locking structure to unlock or lock the first angle adjustment mechanism. This allows for joint adjustment of height and angle, enabling simultaneous adjustment in both front-to-back and up-to-down dimensions. Users can adjust the steering wheel to a suitable position according to their driving needs.

[0107] like Figure 1 , Figure 2 , Figure 4and Figure 5 As shown, in a specific embodiment, a clamping buffer gap 123 is provided between the clamp 103 and the outer tube 102. The clamping buffer gap 123 extends along the circumference of the outer tube 102, and one end of the clamping buffer gap 123 is connected to the opening between the two ear plates.

[0108] Preferred, such as Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, a first spring 122 is pressed between the two ear plates, and the first spring 122 is sleeved on the adjusting rod 111. By setting a clamping buffer gap, it is convenient for the clamp to deform slightly during operation to clamp.

[0109] Optional, such as Figure 1 and Figure 2 As shown, in order to ensure that the first inner tube 100 can only move along the axial direction of the outer tube 102 when adjusting the height, a vertically arranged guide hole can be opened on the clamp 103 and the outer tube 102. Then, a limiting post 135 is installed on the first inner tube 100. The limiting post 135 can extend out of the guide hole to ensure that the outer tube 102 can only move along the axial direction of the first inner tube 100.

[0110] Specifically, such as Figure 1 , Figure 2 and Figure 4 As shown, in this embodiment, the lower end of the first inner tube 100 is fixed with a first U-shaped connector 137, the upper and lower ends of the second inner tube 101 are respectively fixed with a second U-shaped connector 138 and a third U-shaped connector 139, and a fourth U-shaped connector 140 is fixed on the outer wall of the second inner tube 101; the first U-shaped connector 137 and the second U-shaped connector 138 are hinged together by a first hinge pin 104, and the third U-shaped connector 139 is hinged together with the support plate 129 by a fourth hinge pin 107; the lower end of the first angle adjustment mechanism is hinged together with the fourth U-shaped connector 140 by a third hinge pin 106; the angle of the lower end of the second inner tube 101 can be adjusted by connecting the existing angle adjustment mechanism to the support rod.

[0111] In this embodiment, the upper end of the outer tube 102 can be used to install the steering wheel 202.

[0112] The height adjustment mechanism, the first angle adjustment mechanism, and the second angle adjustment structure in this embodiment can adopt existing structures, which can realize the linkage between the height adjustment mechanism and the first angle adjustment mechanism through the pull line after the height adjustment mechanism rotates.

[0113] This embodiment, by setting up a height adjustment mechanism, a first angle adjustment mechanism, and a second angle adjustment structure, allows for height adjustment by loosening or loosening the clamp through the height adjustment mechanism. When adjusting the height, the pull cable can be pulled simultaneously, which in turn drives the first locking structure to unlock or lock the first angle adjustment mechanism. This enables joint adjustment of height and angle, allowing for simultaneous adjustment in both front-to-back and up-to-down dimensions. Users can adjust the steering wheel to a suitable position according to their driving needs.

[0114] Example 4

[0115] Based on Example 3, this example provides a preferred solution for the height adjustment mechanism.

[0116] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the height adjustment mechanism includes an adjustment rod 111, a first gear plate 112, and a second gear plate 113. The adjustment rod 111 passes through and rotates on one ear plate. The first gear plate 112 is fixed to the outer side of another ear plate. The second gear plate 113 is fixed on the adjustment rod 111 and arranged opposite to the first gear plate 112. One end of the adjustment rod 111 is fixed with a pull plate 114 for connecting the upper end of the pull cable 121. The rotation of the adjustment rod 111 allows the second gear plate 113 to be adapted to mesh with or misalign with the first gear plate 112, thereby moving the two ear plates closer or further apart. By setting an adjusting rod, a first gear plate, and a second gear plate, rotating the adjusting rod forward causes the second gear plate on the adjusting rod to disengage from the first gear plate. The two ear plates are no longer under force and move away from each other. The first spring 122 is stretched, and the clamp does not tighten the first inner tube. The height between the outer tube and the first inner tube can be adjusted. At the same time, the pull plate on the adjusting rod pulls the pull line to move, which unlocks the first angle adjustment mechanism and realizes angle adjustment. Rotating the adjusting rod in the opposite direction causes the second gear plate on the adjusting rod to mesh with the first gear plate. One ear plate is moved closer to the other ear plate by the force of the first spring. The clamp tightens the second inner tube, and the outer tube and the first inner tube are locked. At the same time, the pull plate on the adjusting rod resets, and the first angle adjustment mechanism is locked, so angle adjustment cannot be made.

[0117] Specifically, such as Figure 5 As shown, one end of the pull plate 114 in this embodiment is fixed with a protrusion, and the pull cable 121 can be connected to the protrusion.

[0118] like Figure 1 , Figure 2 , Figure 4 and Figure 5As shown, specifically, the two ear plates are a first ear plate 109 and a second ear plate 110. The adjusting rod 111 is rotatably connected to the first ear plate 109. The first gear plate 112 is fixed to the outer side of the second ear plate 110. A pull wire plate 114 is fixed to one end of the adjusting rod 111 that extends out of the first ear plate 109. A second gear plate 113 is fixed to the outer side wall of the section of the adjusting rod 111 that extends out of the second ear plate 110.

[0119] Preferred, such as Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, a bearing 120 is mounted on the first ear plate 109, and the adjusting rod 111 is fixedly connected to the inner ring of the bearing 120. By providing the bearing, it is convenient to rotate the adjusting rod to achieve height and angle adjustment.

[0120] Specifically, such as Figure 2 and Figure 5 As shown, the adjusting rod 111 has a threaded section 115, which can fix the pull plate 114 and the bearing 120 to the end of the threaded section 115 that extends out of the ear plate by means of a first self-locking nut 118, a second self-locking nut 119, and a nut 117. The second self-locking nut 119 and the nut 117 are double nuts to install the bearing 120. The other end of the adjusting rod 111 is coaxially fixed with a handheld section 145. The handheld section 145 has a polygonal structure to facilitate hand rotation of the adjusting rod 111. The free end of the handheld section 145 is fixed with a handle 116, which can be fixed to the handheld section 145 by bolts. The second gear 113 is fixed to the end of the adjusting rod 111 near the handheld section 145.

[0121] Example 5

[0122] Based on Embodiment 3 or Embodiment 4, this embodiment provides a preferred solution for the first angle adjustment mechanism and the second angle adjustment mechanism.

[0123] like Figure 1 , Figure 2 , Figure 4 and Figure 5As shown, the first angle adjustment mechanism includes a first locking gas spring 124. The locking end of the first locking gas spring 124 is hinged to the outer side of the lower end of the first inner tube 100 via a second hinge pin 105. The main body structure end of the first locking gas spring 124 is hinged to the outer wall of the second inner tube 101 via a third hinge pin 106. Both the second hinge pin 105 and the third hinge pin 106 are arranged parallel to the first hinge pin 104. The first locking structure includes a first locking lever 125. The locking end of the first locking gas spring 124 has a first locking hole 126. The first locking lever 125 is hinged in the first locking hole 126. One end of the first locking lever 125 is connected to the lower end of the pull wire 121, and the other end of the first locking lever 125 is correspondingly arranged with the first locking head of the first locking gas spring 124. By setting the first locking lever, the locking and unlocking of the first locking gas spring can be achieved by cooperating with the first locking lever.

[0124] In this embodiment, the first locking gas spring 124 can adopt a commonly used existing structure, and the specific locking principle is the existing technology of locking gas springs.

[0125] In this embodiment, the first angle adjustment mechanism works by rotating the adjusting rod 111 in the forward direction, pulling the pull wire 121, which in turn pulls the first locking lever 125. This causes the first locking lever 125 to press the first locking head of the first locking gas spring 124, thus unlocking the first locking gas spring 124 and enabling it to extend and retract. This allows for the adjustment of the front and rear angles of the first inner tube 100 and the second inner tube 101.

[0126] like Figure 1 , Figure 3 and Figure 6As shown, in this embodiment, the lower end of the second inner tube 101 is hinged to the support plate 129 at the upper end of the support rod 128 via a fourth hinge pin 107. The two ends of the second angle adjustment mechanism are respectively hinged to the outer wall of the second inner tube 101 and the upper end of the support rod 128 via a fifth hinge pin 108 and a sixth hinge pin 144. The fourth hinge pin 107, the fifth hinge pin 108, and the sixth hinge pin 144 are all arranged parallel to the first hinge pin 104. A foot pedal 132 is connected to the upper end of the support rod 128, and the foot pedal 132 is connected to a pedal shaft. A foot pedal shaft 131 is rotatably connected to a support plate 129 at the upper end of a support rod 128. One end of the foot pedal shaft 131, extending into the support plate 129, is connected to a pull rod 130. A limiting pin 146 is fixed on the support plate 129 to limit the upward swing angle of the pull rod 130. One end of the pull rod 130 is connected to the foot pedal shaft 131, and the other end of the pull rod 130 is connected to a second locking structure on a second angle adjustment mechanism via a second spring 133. This allows the second locking structure to be pulled or released, thus unlocking or locking the second angle adjustment mechanism. A limiting groove adapted to the limiting pin 146 is provided on the pull rod 130. By setting up a second angle adjustment mechanism, multi-stage angle adjustment of the tubing can be achieved in conjunction with a foot pedal.

[0127] Specifically, such as Figure 1 , Figure 3 and Figure 6 As shown, the second angle adjustment mechanism includes a second locking gas spring 127. The main body of the second locking gas spring 127 is hinged to the outer wall of the second inner tube 101 via a fifth hinge pin 108. The locking end of the second locking gas spring 127 is hinged to the upper end of the support rod 128 via a sixth hinge pin 144. The second locking end of the second locking gas spring 127 has a second locking hole 136. The second locking structure includes a second locking lever 134. The middle part of the second locking lever 134 is hinged in the second locking hole 136. One end of the second locking lever 134 is connected to the upper end of the second spring 133, and the other end of the second locking lever 134 is correspondingly arranged with the second locking head of the second locking gas spring 127. By setting the second locking lever, it is convenient to cooperate with the second locking gas spring to realize the unlocking or locking of the second locking gas spring.

[0128] like Figures 1-6As shown, a first U-shaped connector 137 is fixed to the lower end of the first inner tube 100, a second U-shaped connector 138 and a third U-shaped connector 139 are fixed to the upper and lower ends of the second inner tube 101, respectively, and a fourth U-shaped connector 140 is fixed to the outer wall of the second inner tube 101; the first U-shaped connector 137 and the second U-shaped connector 138 are hinged to each other via a first hinge pin 104, and the third U-shaped connector 139 is hinged to the support plate 129 via a fourth hinge pin 107; the lower end of the first angle adjustment mechanism is hinged to the fourth U-shaped connector 140 via a third hinge pin 106, and the upper end of the second angle adjustment mechanism is hinged to the fourth U-shaped connector 140 via a fifth hinge pin 108. The third hinge pin 106 is located diagonally above the fifth hinge pin 108 and is arranged close to the second inner tube 101. By setting the U-shaped connectors, the hinged connection between the various tubes is facilitated.

[0129] Specifically, such as Figure 1 and Figure 3 As shown, in this embodiment, a horizontally arranged mounting plate is fixed to the top of the support rod 128. Two parallel support plates 129 are fixed on the mounting plate. A fifth U-shaped connector 142 is also fixed on the mounting plate. The fifth U-shaped connector 142 is located on one side of the two support plates 129. The lower end of the second locking gas spring 127 is hinged in the fifth U-shaped connector 142.

[0130] like Figure 1 and Figure 3 As shown, in this embodiment, a bushing 143 is fixed on the support plate 129, and the foot pedal 132 is rotatably connected to the bushing 143 through the pedal shaft 131. One end of the pedal shaft 131 extends between the two support plates 129 and is vertically fixedly connected to one end of the pull rod 130. A limit pin 146 is fixed on the support plate 129, and the limit pin 146 abuts against the pull rod 130.

[0131] In this embodiment, the second locking gas spring 127 can adopt a commonly used existing structure, and the specific locking principle is the existing technology of locking gas springs.

[0132] In this embodiment, the multi-stage composite adjustable steering mechanism for agricultural machinery can be used by stepping on the foot pedal 132 to rotate the pedal shaft 131, which in turn drives the pull rod 130 to rotate downwards with the foot pedal 132. The pull rod 130 pulls one end of the second locking lever 134 downwards through the second spring 133, and the other end of the second locking lever 134 moves upwards, driving the second locking head of the second locking gas spring 127 to open, allowing the second locking gas spring 127 to extend and retract, thus making the angle of the second inner tube 101 relative to the support rod 128 adjustable. When the foot pedal 132 is no longer pressed, the pull rod 130 returns to its original position under the action of the second spring 133, closing the second locking head of the second locking gas spring 127 and locking the second locking gas spring 127.

[0133] The original steering gear only had a single-level angle adjustment and no height adjustment function, resulting in a very limited adjustment range. The improved steering gear has six-way adjustment capabilities, two rotation centers, and a height adjustment function. The single-level angle adjustment range is (+15°, -25°), the second-level angle adjustment range is (+16°, -16°), and the height adjustment travel is (±30) mm. Here, (+15°, -25°) means that from the position shown in the diagram, it can rotate forward 15° and backward 25°. Combined with the following embodiment, the improved steering gear, through large-angle adjustment, a pull-out mechanism, and a quick-release steering wheel, reduces the overall height C of the steering gear from 810 mm to 550 mm, solving the problem of the component with the greatest height limitation in the driver's cab and achieving a significant structural breakthrough.

[0134] In this embodiment, an outer protective sleeve 147 can be fitted over the steering gear to protect it.

[0135] The multi-stage composite adjustable steering mechanism for agricultural machinery in this embodiment is based on a composite adjustment and locking mechanism of gear plate engagement, inner and outer tube locking, and cable traction. It realizes bidirectional angle and bidirectional height adjustment. By engaging or disengaging the gear plate, the inner and outer tubes can be brought into contact or separated. By rotating the adjusting rod, the cable can be extended or retracted to lock or unlock the gas spring.

[0136] Example 6

[0137] Based on any of the above embodiments, this embodiment provides a preferred disassembly and assembly scheme for the steering wheel 202.

[0138] like Figures 13-24As shown, in this embodiment, the steering wheel 202 is detachably connected to the upper end of the first inner tube 100 via a first quick-release mechanism. The first quick-release mechanism includes an upper quick-release component 203 for connecting to the steering wheel 202, a lower quick-release component 205, and a quick-release mounting plate 207 for connecting to the upper end of the first inner tube 100. The upper quick-release component 203 and the lower quick-release component 205 are detachably connected, and the lower quick-release component 205 is fixedly connected to the quick-release mounting plate 207. When setting up the sleeper berth, the user can quickly remove the steering wheel using the first quick-release mechanism, ensuring sufficient space for the sleeper berth and allowing for quick reinstallation without affecting the user's work, thus meeting the sleeper berth setup needs of users working across regions. The quick-release steering wheel expands the cab space for users to set up a sleeper berth for rest. It addresses the space requirements of users working across regions during sleeper berth setup by providing more usable space through the quick-release steering wheel, allowing users to rest more conveniently and comfortably. When users working across regions need to set up a sleeper berth for rest, they can quickly remove the steering wheel using the quick-release steering wheel mechanism (quick-release steering wheel mechanism). After adjusting the steering gear to its extreme position, enough space can be freed up to set up the sleeper berth.

[0139] like Figures 13-24 As shown, the upper component 203 of the quick-release device in this embodiment includes: a first sleeve 209, a second sleeve 210, a first elastic element 211, and a plurality of balls 212. The first sleeve 209 is sleeved on the outside of the second sleeve 210. The inner wall of the second sleeve 210 is provided with a plurality of first mounting holes spaced apart circumferentially. The plurality of balls 212 are respectively installed in the plurality of first mounting holes. The bottom inner diameter of the first sleeve 209 is larger than the top inner diameter of the first sleeve 209. The two ends of the first elastic element 211 are respectively connected to the first sleeve 209 and the second sleeve 210. The lower component 205 of the quick-release device includes a third sleeve. The outer wall of the third sleeve is provided with a plurality of second mounting holes adapted to the balls 212. The bottom of the third sleeve is provided with a flange for connecting to the quick-release device mounting plate 207. The outer diameter of the third sleeve is smaller than the inner diameter of the second sleeve 210. The second sleeve 210 is detachably sleeved on the outside of the third sleeve. The upper and lower components of the quick-release device are connected by an internal ball-shaped snap-fit ​​structure. When the steering wheel needs to be removed, hold the outer shell of the upper component of the quick-release device upwards with both hands to disengage the upper and lower parts, thereby achieving quick disassembly. When in use, simply snap the upper component of the quick-release device onto the first inner tube upper shaft assembly.

[0140] The first elastic element 211 is used to restore the relative position of the first sleeve 209 and the second sleeve 210, so that a portion of the sphere is pushed out of the first mounting hole by the top of the first sleeve 209, facilitating automatic reset. The first elastic element 211 can be a spring, which is sleeved outside the first sleeve 209 and connected to both the first sleeve 209 and the second sleeve 210. Figure 20 and Figure 21 As shown.

[0141] like Figure 20 and Figure 21 As shown, preferably, the bottom inner surface of the first sleeve 209 is provided with a first conical surface 213 that is larger at the bottom and smaller at the top, and a first retaining ring 214 that limits the movement of the ball 212 is fixed on the bottom inner surface of the first sleeve 209. The first retaining ring 214 is located below the first conical surface 213.

[0142] Furthermore, the multiple first mounting holes and multiple second mounting holes are equally spaced. This facilitates the alignment and engagement of the first and second mounting holes, and allows the first and second mounting holes to be radially limited by the ball joint, preventing relative rotation between the upper and lower components of the quick-release device.

[0143] like Figures 13-24 As shown, the quick-release assembly 203 is further fixedly connected to the steering wheel 202 by a plurality of first screws 201, facilitating the removal and installation of the steering wheel. A steering wheel horn cover 200 is installed on the steering wheel 202, facilitating its installation and maintenance.

[0144] like Figures 13-24 As shown, further, the quick-release mounting plate 207 is fixedly connected to the upper end of the outer tube 102 via a mounting screw assembly 206; the quick-release mounting plate 207 is provided with a spline that matches the upper end of the outer tube 102, and the quick-release lower assembly 205 is fixedly connected to the quick-release mounting plate 207 via multiple second screws 204. This facilitates the installation and maintenance of the quick-release mounting plate and the outer tube, and facilitates the connection between the quick-release mounting plate and the outer tube. The spline is used to prevent relative rotation between the quick-release mounting plate and the outer tube. It also facilitates the connection between the quick-release lower assembly and the quick-release mounting plate.

[0145] The steering wheel assembly process in this embodiment is as follows: the outer tube 102 and the quick-release mounting plate 207 are fixed together by the mounting screw assembly 206 (including screws, spring washers, and washers), as follows. Figure 15 and Figure 16 As shown. The lower quick-release assembly 205 is assembled with the assembly consisting of the mounting screw assembly 206, the quick-release mounting plate 207, and the outer tube 102 from the first step using six second screws 204, as follows. Figure 17 and Figure 18 As shown. Figure 18As shown, after the above assembly, the structural assembly of the mounting part with the outer tube 102 is completed. The quick-release assembly 203 is then assembled to the steering wheel 202 using six first screws 201. Finally, the steering wheel horn cover 200 is snapped onto the steering wheel 202, as shown. Figure 19 As shown. Figure 20 As shown, after the above operations, the steering wheel with quick-release assembly is completed, and together with the previously assembled outer tube assembly, it forms a quick-release steering wheel mechanism.

[0146] like Figure 21 and Figure 22 As shown, the upper component of the quick release device is directly snapped onto the outer tube assembly. The two are snapped together by the internal ball-shaped snap-fit ​​structure (ball). When the steering wheel needs to be removed, both hands are used to pry up the outer shell (first sleeve) in the upper component 203 of the quick release device, so that the upper and lower parts are disengaged, thereby achieving quick disassembly. When in use, the upper component of the quick release device can be directly snapped onto the upper shaft assembly of the steering column.

[0147] Given the unique nature of agricultural machinery users operating across regions, the demand for sleeper berths in cabs is becoming increasingly strong. A well-designed sleeper berth in a cab provides users with a highly comfortable experience and saves them considerable expenses (eliminating the need to stay in hotels), while also enhancing the product's market competitiveness.

[0148] The quick-release steering wheel mechanism provided in this embodiment enables rapid and easy removal and reinstallation of the steering wheel, providing ample space for sleeper berth setup and meeting the needs of users working across regions for accessing, lying down, and sitting in the sleeper berth. Combined with the steering gear angle adjustment mechanism of the aforementioned embodiment, the quick-release steering wheel mechanism reduces the overall height of the steering gear to within 550mm through large-angle steering gear adjustment, height adjustment, and quick-release steering wheel.

[0149] Example 7

[0150] Based on any of the above embodiments, this embodiment provides a preferred disassembly and assembly scheme for the gear shift lever.

[0151] like Figures 8-12As shown, the gear shift lever 407 in this embodiment includes an upper gear shift lever 1 and a lower gear shift lever 2. The lower end of the upper gear shift lever 1 has a socket 11, and the upper end of the lower gear shift lever 2 can be inserted into the socket 11 and is detachably connected to the upper end of the lower gear shift lever 2 via a second quick-release mechanism 3. The lower end of the lower gear shift lever 2 is mounted on the driver's cab floor mat 402 on one side of the main seat 403. The gear shift lever structure of this embodiment is reasonable and ingenious, enabling quick assembly and disassembly of the upper and lower gear shift levers, making operation very convenient. The upper gear shift lever 1 and the lower gear shift lever 2 adopt a plug-in assembly structure with no threaded connection, making their assembly and disassembly convenient and quick.

[0152] In this embodiment, the gear shift lever quick-release mechanism features a split-type design, comprising an upper gear shift lever 1 and a lower gear shift lever 2. The lower end of the lower gear shift lever 2 connects to the gear shift shaft inside the control box, while its upper end extends out of the control box. The lower end of the upper gear shift lever 1 and the upper end of the lower gear shift lever 2 are quickly and easily disassembled via a second quick-release mechanism 3. When setting up a sleeper berth or similar conditions, the height of the gear shift lever needs to be limited; otherwise, a high gear shift lever would affect the berth's installation. The second quick-release mechanism 3 allows for quick removal of the upper gear shift lever 1. After removing the sleeper berth, the initial height of the gear shift lever needs to be restored by reassembling the upper gear shift lever 1 and the lower gear shift lever 2 using the second quick-release mechanism 3. Overall, the structural design is reasonable and ingenious, enabling rapid disassembly and assembly of the upper and lower gear shift levers. Operation is very convenient, and the length of the gear shift lever can be adjusted through quick insertion and removal.

[0153] like Figures 8-12As shown, a preferred embodiment of the second quick-release mechanism is as follows: the second quick-release mechanism 3 includes a knurled sleeve 31, a second elastic element 32, multiple balls 33, and a second retaining ring. The lower outer surface of the upper lever 2 of the shift handle is provided with a first annular groove 12 and a second annular groove 13 arranged in a stepped manner. The diameter of the first annular groove 12 is smaller than the diameter of the second annular groove 13. The knurled sleeve 31 is fitted onto the second annular groove 13. The inner wall of the knurled sleeve 31 is provided with a limiting part 311 adapted to the first annular groove 12. The second elastic element 32 is connected between the end wall of the first annular groove 12 and one end wall of the limiting part 311. The lower inner surface of the knurled sleeve 31 is flush with the upper lever 2. A receiving groove 312 is defined between the limiting parts 311. The side wall of the second annular groove 13 is provided with a plurality of ball holes 4 penetrating its side wall along the circumferential direction. A ball 33 is installed in the ball holes 4. The outer side wall of the upper end of the shift lever 2 is provided with a plurality of fitting grooves 21 that correspond one-to-one with the ball 33 along the circumferential direction. The knurled sleeve 31 is used to move under the action of external force to abut against the end wall of the first annular groove 12 and compress the second elastic member 32, and make the ball 33 move along the limiting part 311 into the receiving groove 312; or after the external force is removed, the knurled sleeve 31 drives the ball 33 to move inward into the fitting groove 21 under the elastic force of the second elastic member 32.

[0154] Furthermore, the lower end of the limiting part 311 is a second conical surface that is larger at the bottom and smaller at the top, and a second retaining ring for limiting the ball 33 is fixed on the lower side wall of the second annular groove 13 or the lower inner surface of the knurled sleeve 31.

[0155] Furthermore, the distance between the inner wall of the receiving groove 312 and the second annular groove 13 is smaller than the diameter of the ball 33; the inner opening of the ball hole 4 is narrowed in the shape of a trumpet and its size is smaller than the diameter of the ball 33.

[0156] In the above implementation scheme, the structure after the upper shift lever 1 and the lower shift lever 2 are assembled is as follows: Figure 3As shown, in this state, one end of the lower shift lever 2 is inserted into the insertion hole 11 at one end of the upper shift lever 1. Simultaneously, a portion of the ball 33 located in the ball hole 4 extends out from the inner opening of the ball hole 4 and is embedded in the fitting groove 21 on the outer surface of one end of the lower shift lever 2. At the same time, the portion of the ball 33 located at the outer opening of the ball hole 4 abuts against the inner surface of the limiting part 311. Simultaneously, the second elastic member 32 is in an extended state, and the elastic force acts on one end wall of the limiting part 311, causing the other end wall of the limiting part 311 to abut against the limiting member 34. This maintains the ball 33 well embedded in the fitting groove 21, thus ensuring that the upper shift lever 1 and the lower shift lever 2 are restricted by the knurled sleeve 31. The proper engagement of the ball bearing 33 with the fitting groove 21 ensures stable assembly between the upper shift lever 1 and the lower shift lever 2. When the lower shift lever 2 needs to be removed, external force is applied to the knurled sleeve 31, causing it to move downwards towards the other end of the upper shift lever 1 and compress the second elastic element 32. The limiting part 311 moves along the surface of the ball bearing 33 as the knurled sleeve 31 moves until the receiving groove 312 moves to the current position of the ball bearing 33. At this point, the limiting part 311, having separated from the ball bearing 33, no longer applies inward pressure (restriction) to the ball bearing 33. Therefore, the ball bearing 33 is "released," and one end of the lower shift lever 2 can be pulled out of the insertion hole 11 at one end of the upper shift lever 1. In other words, the entire removal process only requires external force to move the knurled sleeve 31. After removal, the external force is removed, the second elastic element 32 returns to its initial state, and the elastic force drives the knurled sleeve 31 back to its original position (e.g., Figure 5 (As shown), until the other end wall of the limiting part 311 abuts against the limiting member 34 again. During installation, the same external force is used to move the knurled sleeve 31 to the other end of the shift lever 1 and compress the second elastic member 32. After it is inserted into place, the knurled sleeve 31 is released, and the knurled sleeve 31 will move back to its original position under the elastic force of the second elastic member 32, so that the limiting part 311 "squeezes" the ball 33 again, so that the ball 33 fits well with the fitting groove 21. The overall structural design is very ingenious, and the disassembly and assembly operations are very simple and quick.

[0157] In this embodiment, the fitting groove 21 is a hemispherical groove adapted to the shape of the ball 33.

[0158] In this embodiment, the distance between the inner wall of the receiving groove 312 and the second annular groove 13 is smaller than the diameter of the ball 33. This design ensures that the ball 33 will not fall out of the receiving groove 312 and will always be partially in the ball hole 4.

[0159] In a preferred embodiment, the inner opening of the ball hole 4 (which is a round hole) is narrowed in the shape of a flared mouth, and the diameter of the inner opening (round) of the ball hole 4 is smaller than the diameter of the ball 33.

[0160] In the above implementation scheme, the narrowing of the inner opening of the ball hole 4 prevents the ball 33 from falling out of the inner opening of the ball hole 4. In other words, even after the shift lever 1 is removed, the ball 33 will always remain in the ball hole 4 and move within the ball hole 4, without falling out of the ball hole 4 from the inside or outside.

[0161] In this embodiment, the aforementioned limiting member 34 is an unclosed annular component, and is coaxially distributed with the aforementioned second annular groove 13. A second retaining ring can be used. During installation, the unclosed (i.e., open-ring) portion of the limiting member 34 is opened by external force and inserted into the second annular groove 13.

[0162] In this embodiment, the second elastic element 32 is a spring of a suitable type and is sleeved in the second annular groove 13.

[0163] In a preferred embodiment, the aforementioned insertion hole 11 includes a first positioning hole and a second engaging hole coaxially arranged. The diameter of the second engaging hole is larger than the diameter of the first positioning hole, and the second engaging hole extends to one end of the upper lever 1 of the gear shift lever. Correspondingly, one end of the lower lever 2 of the gear shift lever is coaxially provided with a first positioning post (indicated by c in the figure) with a smaller diameter. The first positioning post is inserted into the first positioning hole, and one end of the lower lever 2 of the gear shift lever is inserted into the second engaging hole. The first positioning post and one end of the lower lever 2 of the gear shift lever form a tapered transition.

[0164] In the above implementation scheme, the "stepped" structural design of the insertion hole 11 makes it smaller inside and larger outside (that is, the diameter is smaller at the depth and larger at the opening). Combined with the design of the first positioning post at one end of the shift lever 2, when the shift lever 2 is inserted into the insertion hole 11, the diameter of the first positioning post is smaller than the diameter of the second mating hole. Therefore, the first positioning post can easily enter the second mating hole, making the insertion faster and more convenient.

[0165] In this embodiment, the other end wall of the limiting part 311 is a conical surface. Before the knurled sleeve 31 is released, the conical surface contacts the ball 33 partially in the receiving groove 312. When the knurled sleeve 31 is released, the elastic force of the second elastic member 32 acts on one end wall of the limiting part 311, which causes the ball 33 to move relative to the conical surface until it abuts (or contacts) the inner surface of the limiting part 311. This conical surface design facilitates the relative rolling of the ball 33 along its surface without causing obstruction.

[0166] The height of the gear shift lever in this embodiment is also a key factor limiting the height of the sleeper berth in the driver's cab. To ensure convenient operation for the driver, the lever height cannot be lowered indefinitely. To address the gear shifting height issue, a quick-release structure was designed. The quick-release mechanism is similar to a quick-release hydraulic hose. This mechanism allows for rapid separation and engagement of the upper and lower gear shift levers, solving the space utilization problem in gear shifting. After the improvement, the gear shift lever height is reduced by 50mm without affecting normal use. After the upper gear shift lever is removed via the quick-release structure, the overall height E is reduced by 325mm compared to the original structure, meaning the top of the gear shift lever is only 480mm from the floor.

[0167] Example 8

[0168] The present invention also provides an agricultural machine, including a vehicle body and an agricultural machine cab as described above, wherein the agricultural machine cab is installed on the front side of the vehicle body.

[0169] The agricultural machinery in this embodiment can further expand and utilize the cab space to solve the sleeper construction needs of users who operate harvesters across regions. This solution not only solves the problem of cab space utilization but also saves users' living expenses and enhances the product's market competitiveness.

[0170] In the description of this invention, it should be understood that the terms "length", "upper", "lower", "front", "rear", "horizontal", "top", "bottom", "inner", "outer", "axial", 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 invention 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 invention.

[0171] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0172] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0173] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0174] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0175] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A driver's cab for agricultural machinery, characterized in that, The cab includes a cab body, which has multiple sleeper berths located at the same horizontal level and at a distance of not less than 850mm from the inner surface of the top wall of the cab body. The cab body also has functional components that, when disassembled, folded, or compressed, do not rise above the horizontal plane where the sleeper berths are located.

2. The agricultural machinery cab according to claim 1, characterized in that, It also includes a sleeper berth, which can be slidably installed above the sleeper berth mounting position and can abut against the sleeper berth mounting position for limiting; or, the sleeper berth can be folded and installed on the rear side wall of the cab body and can abut against the sleeper berth mounting position for limiting when opened; or the sleeper berth is detachably connected to the sleeper berth mounting position.

3. The agricultural machinery cab according to claim 1, characterized in that, The functional components include at least one of the following: the main seat, steering gear, control box, gear shift lever, and armrest box; the distance between the horizontal plane where the sleeper berth is installed and the cab floor mat is no more than 650mm.

4. The agricultural machinery cab according to claim 3, characterized in that, The steering mechanism includes a steering wheel, a first inner tube, a second inner tube, and a support rod. The lower end of the support rod is fixed to the driver's cab floor mat in front of the driver's seat. The steering wheel is detachably connected to the upper end of the first inner tube. The lower end of the first inner tube is hinged to the upper end of the second inner tube, and the lower end of the second inner tube is hinged to the support rod. The first inner tube and the second inner tube are connected by a first angle adjustment mechanism, and the second inner tube is connected to the support rod by a second angle adjustment mechanism.

5. The agricultural machinery cab according to claim 4, characterized in that, The upper end of the first inner tube is connected to an outer tube via a height adjustment mechanism, and the steering wheel is detachably connected to the upper end of the outer tube. The lower end of the outer tube is sleeved on the upper end of the first inner tube, and the lower end of the first inner tube is hinged to the upper end of the second inner tube via a first hinge shaft. A clamp is fixed to the lower end of the outer tube and sleeved on the outside of the first inner tube. Two ear plates are fixed to the outer surface of the opening side of the clamp. A height adjustment mechanism is connected to the two ear plates to tighten or loosen the first inner tube by rotation. The side walls of the first inner tube and the second inner tube are connected via a first angle adjustment mechanism. One end of the height adjustment mechanism is connected to the upper end of a pull cable, and the lower end of the pull cable is connected to a first locking structure on the first angle adjustment mechanism, which can pull or loosen the first locking structure to unlock or lock the first angle adjustment mechanism.

6. The agricultural machinery cab according to claim 5, characterized in that, The height adjustment mechanism includes an adjustment rod, a first toothed disc, and a second toothed disc. The two ear plates are the first ear plate and the second ear plate, respectively. The adjustment rod is rotatably connected to the first ear plate. The first toothed disc is fixed to the outer side of the second ear plate. A pull plate for connecting the upper end of the pull cable is fixed to one end of the adjustment rod extending out of the first ear plate. A second toothed disc is fixed to the outer side wall of the section of the adjustment rod extending out of the second ear plate. The second toothed disc is fixed to the adjustment rod and arranged opposite to the first toothed disc. The rotation of the adjustment rod allows the second toothed disc to mesh with or be misaligned with the first toothed disc, thus moving the two ear plates closer or further apart. A bearing is mounted on the first ear plate, and the adjusting rod is fixedly connected to the inner ring of the bearing.

7. The agricultural machinery cab according to claim 5, characterized in that, A clamping buffer gap is provided between the clamp and the outer tube. The clamping buffer gap extends along the circumference of the outer tube. One end of the clamping buffer gap is connected to the opening between the two ear plates. A first spring is pressed between the two ear plates and is sleeved on the adjusting rod.

8. The agricultural machinery cab according to claim 5, characterized in that, The first angle adjustment mechanism includes a first locking gas spring. The locking end of the first locking gas spring is hinged to the outer side of the lower end of the first inner tube through a second hinge shaft. The main body structure end of the first locking gas spring is hinged to the outer side wall of the second inner tube through a third hinge shaft. The second hinge shaft and the third hinge shaft are both arranged parallel to the first hinge shaft. The first locking structure includes a first locking lever, the locking end of the first locking gas spring is provided with a first locking hole, the first locking lever is hinged in the first locking hole, one end of the first locking lever is connected to the lower end of the pull wire, and the other end of the first locking lever is arranged correspondingly to the first locking head of the first locking gas spring.

9. The agricultural machinery cab according to claim 5, characterized in that, The lower end of the second inner tube is hinged to the support plate at the upper end of the support rod via a fourth hinge shaft. The two ends of the second angle adjustment mechanism are respectively hinged to the outer wall of the second inner tube and the upper end of the support rod via a fifth hinge shaft and a sixth hinge shaft. The fourth hinge shaft, the fifth hinge shaft and the sixth hinge shaft are all arranged parallel to the first hinge shaft. A foot pedal is connected to the upper end of the support rod. The foot pedal is rotatably connected to the support plate at the upper end of the support rod via a pedal shaft. One end of the pedal shaft, which extends into the support plate, is connected to a pull rod. A limiting pin is fixed on the support plate to limit the pull rod. One end of the pull rod is connected to the pedal shaft, and the other end of the pull rod is connected to the second locking structure on the second angle adjustment mechanism via a second spring. The pull rod can pull or release the second locking structure to unlock or lock the second angle adjustment mechanism.

10. The agricultural machinery cab according to claim 9, characterized in that, The second angle adjustment mechanism includes a second locking gas spring. The main body structure end of the second locking gas spring is hinged to the outer wall of the second inner tube through a fifth hinge axis, and the locking end of the second locking gas spring is hinged to the upper end of the support rod through a sixth hinge axis. The second locking end of the second locking gas spring has a second locking hole. The second locking structure includes a second locking lever. The middle part of the second locking lever is hinged in the second locking hole. One end of the second locking lever is connected to the upper end of the second spring. The other end of the second locking lever is arranged correspondingly to the second locking head of the second locking gas spring.

11. The agricultural machinery cab according to claim 9, characterized in that, The lower end of the first inner tube is fixed with a first U-shaped connector, the upper end and the lower end of the second inner tube are respectively fixed with a second U-shaped connector and a third U-shaped connector, and the outer side wall of the second inner tube is fixed with a fourth U-shaped connector. The first U-shaped connector and the second U-shaped connector are hinged together by a first hinge axis, and the third U-shaped connector and the support plate are hinged together by a fourth hinge axis; the lower end of the first angle adjustment mechanism is hinged together with the fourth U-shaped connector by a third hinge axis, and the upper end of the second angle adjustment mechanism is hinged together with the fourth U-shaped connector by a fifth hinge axis. The third hinge axis is located diagonally above the fifth hinge axis and is arranged close to the second inner tube.

12. The agricultural machinery cab according to claim 4, characterized in that, The steering wheel is detachably connected to the upper end of the first inner tube via a first quick-release mechanism. The first quick-release mechanism includes an upper quick-release component, a lower quick-release component, and a quick-release mounting plate for connecting to the steering wheel. The upper quick-release component and the lower quick-release component are detachably connected, and the lower quick-release component is fixedly connected to the quick-release mounting plate.

13. The agricultural machinery cab according to claim 12, characterized in that, The quick-release assembly includes: a first sleeve, a second sleeve, a first elastic element, and a plurality of balls. The first sleeve is sleeved on the outside of the second sleeve. The inner wall of the second sleeve is provided with a plurality of first mounting holes spaced apart along the circumference. The plurality of balls are respectively installed in the plurality of first mounting holes. The bottom inner diameter of the first sleeve is larger than the top inner diameter of the first sleeve. The two ends of the first elastic element are respectively connected to the first sleeve and the second sleeve. The lower component of the quick-release device includes a third sleeve. The outer wall of the third sleeve is provided with a plurality of second mounting holes that are adapted to the ball. The bottom of the third sleeve is provided with a flange for connecting to the quick-release device mounting plate. The outer diameter of the third sleeve is smaller than the inner diameter of the second sleeve. The second sleeve is detachably sleeved on the outside of the third sleeve.

14. The agricultural machinery cab according to claim 13, characterized in that, The bottom inner surface of the first sleeve is provided with a first conical surface that is larger at the bottom and smaller at the top. A first retaining ring is fixed on the bottom inner surface of the first sleeve to limit the movement of the ball. The first retaining ring is located below the first conical surface.

15. The agricultural machinery cab according to claim 3, characterized in that, The gear shift lever includes an upper gear shift lever and a lower gear shift lever. The lower end of the upper gear shift lever has a socket. The upper end of the lower gear shift lever can be inserted into the socket and is detachably connected to the upper end of the lower gear shift lever via a second quick-release mechanism. The lower end of the lower gear shift lever is mounted on the driver's cab floor mat on the side of the driver's seat.

16. The agricultural machinery cab according to claim 15, characterized in that, The second quick-release mechanism includes a knurled sleeve, a second elastic element, multiple balls, and a second retaining ring. The lower outer surface of the upper end of the shift lever is provided with a first annular groove and a second annular groove arranged in a stepped manner. The diameter of the first annular groove is smaller than the diameter of the second annular groove. The knurled sleeve is fitted onto the second annular groove. The inner sidewall of the knurled sleeve is provided with a limiting part that matches the first annular groove. The second elastic element is connected between the end wall of the first annular groove and one end wall of the limiting part. The inner surface of the lower end of the knurled sleeve defines a receiving groove between the limiting part and the knurled sleeve. The side wall of the second annular groove is provided with a plurality of ball holes that penetrate the side wall in the circumferential direction. Balls are installed in the ball holes. The outer side wall of the upper end of the shift lever is provided with a plurality of fitting grooves that correspond to and fit into the ball in a one-to-one manner in the circumferential direction. The knurled sleeve is used to move under external force to abut against the end wall of the first annular groove, compress the second elastic member, and cause the ball to move along the limiting part into the receiving groove; or after the external force is removed, the knurled sleeve drives the ball to move inward into the fitting groove under the elastic force of the second elastic member.

17. The agricultural machinery cab according to claim 16, characterized in that, The lower end of the limiting part is a second conical surface that is larger at the bottom and smaller at the top. A second retaining ring for limiting the ball is fixed on the lower side wall of the second annular groove or the lower inner surface of the knurled sleeve.

18. The agricultural machinery cab according to claim 16, characterized in that, The distance between the inner wall of the receiving groove and the second annular groove is less than the diameter of the ball; the inner opening of the ball hole is narrowed in the shape of a trumpet and its size is smaller than the diameter of the ball.

19. The agricultural machinery cab according to claim 16, characterized in that, The insertion hole includes a first positioning hole and a second connecting hole arranged coaxially. The diameter of the second connecting hole is larger than the diameter of the first positioning hole, and the second connecting hole extends to one end of the upper lever of the shift lever. Correspondingly, one end of the lower lever of the shift lever is coaxially provided with a first positioning post with a smaller diameter. The first positioning post is inserted into the first positioning hole, and one end of the lower lever of the shift lever is inserted into the second connecting hole. The first positioning post and one end of the lower lever of the shift lever form a tapered transition.

20. The agricultural machinery cab according to claim 3, characterized in that, The armrest box is equipped with a two-dimensional adjustment frame that can adjust the height of the armrest box. When the two-dimensional adjustment frame is in the initial position and the adjusted position, the height difference of the armrest box is (50~150)mm. The height of the control box is the same as the height of the passenger seat in the driver's cab. The main seat is mounted on a support on the cab floor mat via a shock-absorbing mechanism. The main seat is provided with a limiting strap on the left or right side, and the limiting strap is detachably connected to a hook on the support.

21. An agricultural machine, characterized in that, It includes a vehicle body and an agricultural machinery cab as described in any one of claims 1 to 20, wherein the agricultural machinery cab is mounted on the front side of the vehicle body.

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