A harvester overturns cab limiting locking mechanism
By combining locking and stabilizing devices, the problem of not being able to limit the position after the harvester cab is tilted is solved, thus achieving stability after the cab is tilted and preventing rebound and reset.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU WORLD AGRI MACHINERY
- Filing Date
- 2025-05-14
- Publication Date
- 2026-06-26
AI Technical Summary
The existing harvester cab tilting mechanism cannot limit the position after tilting, which causes the cab to spring back and reset.
The design employs a combination of locking and stabilizing devices, including the cooperation of components such as a pressure plate, a special-shaped frame, a sliding frame, a sliding column, a pull plate, an arc-shaped block, and a counter-pressure spring. The arc-shaped block, under the action of the counter-pressure spring, restricts the position of the pressure plate. Combined with the cooperation of components such as a pull-out ring, an arc-shaped frame, a sliding tube, support legs, a semi-arc insert, an inner insertion hole, and an elastic telescopic rod, the position of the support legs is fixed to ensure that the cab does not spring back after being tilted.
This effectively avoids the problem of the cab rebounding and resetting after it is overturned due to the inability to limit its position, thus ensuring the stability of the cab after it is overturned.
Smart Images
Figure CN224409415U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of harvester technology, specifically relating to a limit locking mechanism for the tilting cab of a harvester. Background Technology
[0002] The background technology of the limit locking mechanism for the tilting cab of a harvester mainly relates to agricultural machinery and equipment, especially the tilting design of the harvester cab. With the continuous development of agricultural machinery, especially the emergence of large self-propelled harvesters, the tilting function of the cab has gradually become an important design feature.
[0003] Patent publication number CN208827970U discloses a cab tilting mechanism for a harvester, including a frame, a cab, and a support frame. The front bottom of the cab is hinged to the front end of the frame via a hinge plate. A buffer pad is provided on the rear bottom of the cab, and an n-shaped hook groove is provided at the rear end of the buffer pad. A support frame is provided on the front top of the frame. A tilting fixing arm is provided in the middle of the support frame on one side of the cab. An upper tilting cylinder is hinged to the tilting fixing arm. A lower tilting cylinder is hinged to the bottom of the support frame below the upper tilting cylinder. A hook arm is provided in the hook groove. One end of the hook arm is hinged to the bottom of the cab outside the inner cavity of the hook groove, and the other end of the hook arm is bent to form a hook. A hook cylinder is hinged to the middle of the hook arm. The hook cylinder is hinged to the bottom of the cab inside the inner cavity of the hook groove. This patent has a reasonable structure and good performance.
[0004] However, the cab tilting mechanism used in harvesters currently has the following problems: the existing cab tilting mechanism cannot limit the position after tilting, which causes the cab to spring back and reset. Therefore, we propose a limit locking mechanism for the cab tilting of harvesters. Utility Model Content
[0005] The purpose of this invention is to provide a limiting and locking mechanism for the tilting cab of a harvester, which can solve the problem that existing cab tilting mechanisms in related technologies cannot limit the position after tilting, resulting in the cab springing back and resetting.
[0006] The specific technical solution adopted by this utility model is as follows:
[0007] A limit locking mechanism for a harvester's tilting cab includes a harvester main platform. Two electric telescopic rods are rotatably connected to the side of the harvester main platform. A harvester cab is fixedly connected between the two electric telescopic rods. A cab curtain and a safety door are provided on the side of the harvester cab. A locking device is provided on the side of the harvester cab. The locking device includes a pressure plate, the side of which is fixedly connected to the side of the harvester cab. The side of the pressure plate closest to the harvester cab is fixedly connected to the side of the harvester main platform. A shaped frame is fixedly connected to the side of the harvester main platform. A locking assembly is provided on the side of the shaped frame. An arc-shaped block is fixedly connected to the moving end of the locking assembly.
[0008] The locking assembly includes a sliding frame, the side of which is fixedly connected to the side of the irregular frame. A sliding column is slidably installed through the side of the sliding frame. A pull plate is fixedly connected to the side of the sliding column away from the main platform of the harvester. The side of the arc-shaped block is fixedly connected to the side of the sliding column near the main platform of the harvester. A counter-pressure spring is provided on the side of the arc-shaped block and the inner wall of the sliding frame. The sliding column is the moving end of the locking assembly.
[0009] The curved irregular block has a curved surface on the side near the pressure plate, and the pressure plate has a curved surface on the side near the curved irregular block.
[0010] The curved surface of the irregularly shaped block is located on the movement trajectory of the curved surface of the pressure plate, and the pressure plate is made of a highly wear-resistant material.
[0011] The pull plate is equipped with a stabilizing device on its side. The stabilizing device includes a pull-out ring, which is fixedly connected to the side of the pull plate. An arc-shaped frame is fixedly connected to the outer wall of the sliding frame. A sliding tube is fixedly connected to the bottom of the arc-shaped frame. An external insertion hole is opened on the outer wall of the sliding tube. A support leg is slidably connected to the inner wall of the sliding tube. A semi-circular insert is fixedly connected to the top of the support leg. An internal insertion hole is opened on the outer wall of the support leg. An elastic telescopic rod is fixedly connected to the outer wall of the arc-shaped frame. A fixed insertion post is fixedly connected to the telescopic end of the elastic telescopic rod.
[0012] The insertion block of the pull-out ring contacts the insertion hole of the semi-circular insertion block, and the outer insertion hole and the inner insertion hole are located on the movement trajectory of the fixed insertion post.
[0013] The technical effects achieved by this utility model are as follows:
[0014] This invention, through the setting of a locking device, enables the rotating pressure plate, irregular frame, sliding frame, sliding column, pull plate, arc-shaped block, and counter-pressure spring to cooperate. The arc-shaped block is no longer subject to the reverse force of the rotating pressure plate, and under the reverse force of the counter-pressure spring, the arc-shaped block slides towards the harvester cab. This allows the arc-shaped block to restrict the position of the rotating pressure plate, preventing the cab from rebounding and resetting after the cab has been tilted because the cab cannot be positioned.
[0015] This invention, through the setting of a stabilizing device, enables the pull-out insert ring, arc frame, slide tube, outer insert hole, support leg, semi-arc insert block, inner insert hole, elastic telescopic rod, and fixed insert post to cooperate. After the support leg slides down, the outer insert hole and the inner insert hole are aligned. At this time, the fixed insert post is subjected to the elastic force of the elastic telescopic rod, causing the insert tip of the fixed insert post to be inserted into the outer insert hole and the inner insert hole, thereby restricting the position of the support leg and preventing instability after the harvester cab is tilted. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the entire utility model;
[0017] Figure 2 This is a schematic diagram of the structure of the harvester cab of this utility model;
[0018] Figure 3 This is a schematic diagram of the structure of the pressure plate of this utility model;
[0019] Figure 4 This is a schematic diagram of the structure of the curved irregular block of this utility model;
[0020] Figure 5 This is a utility model Figure 5 A magnified schematic diagram of the structure at point A in the middle.
[0021] The attached diagram lists the components represented by each number as follows:
[0022] 1. Main platform; 2. Electric telescopic rod; 3. Harvester cab; 4. Cab curtain; 5. Safety door; 6. Locking device; 61. Sliding plate; 62. Irregular frame; 63. Sliding frame; 64. Sliding column; 65. Pull plate; 66. Arc-shaped block; 67. Counter-pressure spring; 7. Stabilizing device; 71. Pull-out insert ring; 72. Arc-shaped frame; 73. Sliding tube; 74. External insertion hole; 75. Support leg; 76. Semi-arc insert block; 77. Internal insertion hole; 78. Elastic telescopic rod; 79. Fixed insert column. Detailed Implementation
[0023] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.
[0024] like Figure 1-5 As shown, a harvester tilting cab limiting and locking mechanism includes a harvester main platform 1, two electric telescopic rods 2 rotatably connected to the side of the harvester main platform 1, a harvester cab 3 fixedly connected between the two electric telescopic rods 2, a cab curtain 4 and a safety door 5 on the side of the harvester cab 3, and a locking device 6 on the side of the harvester cab 3. The locking device 6 includes a pressure plate 61, the side of the pressure plate 61 is fixedly connected to the side of the harvester cab 3, and the side of the pressure plate 61 closest to the harvester cab 3 is fixedly connected to the side of the harvester main platform 1. A special-shaped frame 62 is fixedly connected to the side of the harvester main platform 1, and a locking assembly is provided on the side of the special-shaped frame 62. An arc-shaped block 66 is fixedly connected to the moving end of the locking assembly. The surface of the arc-shaped block 66 is smooth to ensure better contact.
[0025] The locking assembly includes a sliding frame 63, the side of which is fixedly connected to the side of the irregular frame 62. A sliding column 64 is slidably installed through the side of the sliding frame 63. A pull plate 65 is fixedly connected to the side of the sliding column 64 away from the main body platform 1 of the harvester. The side of the arc-shaped block 66 is fixedly connected to the side of the sliding column 64 near the main body platform 1 of the harvester. A counter-pressure spring 67 is provided on the side of the arc-shaped block 66 and the inner wall of the sliding frame 63. The sliding column 64 is the moving end of the locking assembly. The counter-pressure spring 67 ensures that the arc-shaped block 66 can be reset after the reverse force ends.
[0026] The curved surface of the irregular block 66 is curved on the side near the pressure plate 61, and the pressure plate 61 is curved on the side near the curved surface of the irregular block 66. The curved surface design ensures smoother operation.
[0027] The curved surface of the irregular block 66 is located on the movement trajectory of the curved surface of the pressure plate 61. The pressure plate 61 is made of a highly wear-resistant material, which ensures that the pressure plate 61 can be used for a long time.
[0028] According to the above structure, when it is necessary to lift and tilt the harvester cab 3, the operator manually opens the electric telescopic rod 2. The telescopic end of the electric telescopic rod 2 drives the harvester cab 3 to tilt under the limiting assistance of the pressure plate 61. When the harvester cab 3 rotates to the limit position, the pressure plate 61 rotates and its arc surface presses and pushes the arc surface of the arc-shaped block 66. Under the limiting action of the sliding column 64, the arc-shaped block 66 slides away from the harvester cab 3. After the pressure plate 61 rotates and passes the arc-shaped block 66, the arc-shaped block 66 is no longer subject to the reverse force of the pressure plate 61. Under the reverse force of the counter-pressure spring 67, the arc-shaped block 66 slides towards the harvester cab 3, thereby limiting the position of the pressure plate 61 and preventing the cab from rebounding and resetting after tilting because the cab cannot be positioned.
[0029] like Figure 1-5 As shown, a stabilizing device 7 is provided on the side of the pull plate 65. The stabilizing device 7 includes a pull-out ring 71, which is fixedly connected to the side of the pull plate 65. An arc-shaped frame 72 is fixedly connected to the outer wall of the sliding frame 63. A sliding tube 73 is fixedly connected to the bottom of the arc-shaped frame 72. An external insertion hole 74 is opened on the outer wall of the sliding tube 73. A support leg 75 is slidably connected to the inner wall of the sliding tube 73. A semi-circular insert 76 is fixedly connected to the top of the support leg 75. An internal insertion hole 77 is opened on the outer wall of the support leg 75. An elastic telescopic rod 78 is fixedly connected to the outer wall of the arc-shaped frame 72. A fixed insertion post 79 is fixedly connected to the telescopic end of the elastic telescopic rod 78. The fixed insertion post 79 ensures that the support leg 75 is fixed in position after sliding down.
[0030] The insertion block of the pull-out insertion ring 71 contacts the insertion hole of the semi-circular insertion block 76, and the outer insertion hole 74 and the inner insertion hole 77 are located on the movement trajectory of the fixed insertion post 79, ensuring the stable fixing conditions of the support leg 75.
[0031] According to the above structure, when the pull plate 65 slides away from the harvester cab 3, it causes the pull-out ring 71 to slide away from the harvester cab 3. The pull-out ring 71 slides away from the harvester cab 3, causing its insert block to lose its restrictive effect on the semi-circular insert block 76. At this time, the support leg 75 slides downward under the action of gravity. After the support leg 75 slides downward, the outer insert hole 74 is aligned with the inner insert hole 77. At this time, the fixed insert post 79 is subjected to the elastic force of the elastic telescopic rod 78, so that the insert tip of the fixed insert post 79 is inserted into the outer insert hole 74 and the inner insert hole 77, thereby restricting the position of the support leg 75, so that the harvester cab 3 will not be unstable after being overturned.
[0032] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.
Claims
1. A limit locking mechanism for a harvester's tilting cab, comprising a harvester main platform (1), two electric telescopic rods (2) rotatably connected to the side of the harvester main platform (1), a harvester cab (3) fixedly connected between the two electric telescopic rods (2), a cab curtain (4) provided on the side of the harvester cab (3), and a safety door (5) provided on the side of the harvester cab (3), characterized in that: A locking device (6) is provided on the side of the harvester cab (3). The locking device (6) includes a pressure plate (61). The side of the pressure plate (61) is fixedly connected to the side of the harvester cab (3). The side of the pressure plate (61) near the harvester cab (3) is fixedly connected to the side of the harvester main platform (1). A special-shaped frame (62) is fixedly connected to the side of the harvester main platform (1). A locking component is provided on the side of the special-shaped frame (62). An arc-shaped block (66) is fixedly connected to the moving end of the locking component.
2. The harvester tilting cab limiting locking mechanism according to claim 1, characterized in that: The locking assembly includes a sliding frame (63), the side of which is fixedly connected to the side of the irregular frame (62). A sliding column (64) is slidably installed through the side of the sliding frame (63). A pull plate (65) is fixedly connected to the side of the sliding column (64) away from the main platform (1) of the harvester. The side of the arc-shaped block (66) is fixedly connected to the side of the sliding column (64) near the main platform (1) of the harvester. A counter-pressure spring (67) is provided on the side of the arc-shaped block (66) and the inner wall of the sliding frame (63). The sliding column (64) is the moving end of the locking assembly.
3. The harvester tilting cab limiting locking mechanism according to claim 2, characterized in that: The curved irregular block (66) is curved on the side near the pressure plate (61), and the pressure plate (61) is curved on the side near the curved irregular block (66).
4. The harvester tilting cab limiting locking mechanism according to claim 2, characterized in that: The arc surface of the irregularly shaped block (66) is located on the movement trajectory of the arc surface of the pressure plate (61), and the pressure plate (61) is made of a highly wear-resistant material.
5. The harvester tilting cab limiting locking mechanism according to claim 2, characterized in that: The pull plate (65) is provided with a stabilizing device (7) on its side. The stabilizing device (7) includes a pull-out ring (71). The side of the pull-out ring (71) is fixedly connected to the side of the pull plate (65). An arc frame (72) is fixedly connected to the outer wall of the sliding frame (63). A sliding tube (73) is fixedly connected to the bottom of the arc frame (72). An external insertion hole (74) is opened on the outer wall of the sliding tube (73). A support leg (75) is slidably connected to the inner wall of the sliding tube (73). A semi-arc insert (76) is fixedly connected to the top of the support leg (75). An internal insertion hole (77) is opened on the outer wall of the support leg (75). An elastic telescopic rod (78) is fixedly connected to the outer wall of the arc frame (72). A fixed insertion post (79) is fixedly connected to the telescopic end of the elastic telescopic rod (78).
6. The harvester tilting cab limiting locking mechanism according to claim 5, characterized in that: The insertion block of the pull-out insertion ring (71) is in contact with the insertion hole of the semi-arc insertion block (76), and the outer insertion hole (74) and the inner insertion hole (77) are located on the movement trajectory of the fixed insertion post (79).