Transmission structure and agricultural operation machine

Abstract

The utility model provides a transmission structure and an agricultural operation machine. Comprising a main input gear, a main shaft, a first output assembly and a second output assembly, the main shaft and the main input gear rotate synchronously, the main input gear is arranged in the middle of the main shaft, the first output assembly is arranged on one side of the main shaft, and the second output assembly is arranged on the other side of the main shaft; the first output assembly and the second output assembly are the same in structure and symmetrically arranged on the two sides of the main shaft. The first output assembly comprises a clutch assembly, a clutch spring and a thrust bearing, the clutch spring can achieve resetting of the clutch assembly, and then transmission or disconnection of power of the first output assembly is achieved. A limiting check ring between the clutch spring and the shaft check ring in the prior art is changed into the thrust bearing, the function of the clutch spring is guaranteed, abrasion between the clutch spring and the limiting check ring is avoided, and the service life of the gearbox is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery, and in particular to a transmission structure and an agricultural work machine. Background Technology

[0002] In existing technology, the steering clutch spring and bearing of tracked harvester gearboxes employ a structure of shaft retaining rings and limiting retaining rings. When the harvester turns left or right, a paddle shifter separates the teeth of the left and right clutch gears from those of the central steering clutch gear. The central steering clutch gear, along with the shaft (interference fit), limiting retaining ring, shaft retaining ring, and bearing inner ring, continues to rotate with the gears. Meanwhile, the left and right clutch gears and clutch springs cut off power and press against the friction plates to stop rotation. This causes relative movement between the clutch spring and the limiting retaining ring, resulting in wear. Furthermore, the generated metal shavings contaminate the oil, thus affecting the service life of the gearbox. Therefore, it is necessary to provide a transmission structure and agricultural harvester to overcome the aforementioned defects. Utility Model Content

[0003] The purpose of this utility model is to provide a transmission structure and an agricultural work machine.

[0004] According to one aspect of the present invention, a transmission structure and an agricultural work machine are provided, comprising:

[0005] Main input gear;

[0006] A main shaft that rotates synchronously with the main input gear, the main input gear being located at the middle of the main shaft;

[0007] A first output component is disposed on one side of the spindle;

[0008] The second output component is located on the other side of the main shaft. The first output component and the second output component have the same structure and are symmetrically arranged on both sides of the main shaft.

[0009] The first output component includes:

[0010] A first shaft is loosely fitted onto the main shaft. The first shaft moves to the side of the main input gear, and the main shaft rotates synchronously with the first shaft. The first shaft moves away from the main input gear, and the main shaft rotates relative to the first shaft.

[0011] A first output gear is mounted on the first shaft and rotates synchronously with the first shaft.

[0012] A first clutch assembly is mounted on a first shaft. When the first shaft moves to the side of the main input gear, the first clutch assembly disengages. When the first shaft moves away from the main input gear, the first clutch assembly engages to change the rotational speed and / or rotational direction of the first shaft.

[0013] A first thrust bearing is disposed on the main shaft, and one side of the first thrust bearing is fixed to the main shaft;

[0014] A first elastic element is sleeved on the main shaft and has a clearance fit with the main shaft. One end of the first elastic element abuts against the first shaft, and the other end of the first elastic element abuts against the other side of the first thrust bearing.

[0015] Preferably, the main input gear has a first tooth groove on one side, the first output gear has a first toothed part that mates with the first tooth groove, the first shaft has a first pawl, and the first pawl drives the first shaft to move along the main shaft to connect or disconnect the first tooth groove and the first toothed part.

[0016] Preferably, the first shaft is rotatably connected to the main shaft on the side near the main input gear via a first bushing, and a first step is provided on the side of the first shaft away from the main input gear, with the first elastic element disposed on the first step.

[0017] Preferably, the main shaft is provided with a first end cover and a second end cover on both sides, the first end cover is provided with a first bearing, the second end cover is provided with a second bearing, and the main shaft is located between the first bearing and the second bearing.

[0018] Preferably, the main shaft is provided with a first retaining ring, and the inner end cover is also provided with a third retaining ring. The inner ring of the first bearing is limited by the first retaining ring, and the outer ring of the first bearing is limited by the third retaining ring.

[0019] Preferably, the first thrust bearing includes a first contact surface, a second contact surface, and a roller disposed between the first contact surface and the second contact surface. The first contact surface abuts against the first retaining ring, the second contact surface abuts against the first elastic element, and the inner ring of the second contact surface has a clearance fit with the main shaft.

[0020] Preferably, the first clutch assembly includes a first pressure plate connected to the first shaft, a second pressure plate connected to the first end cover, and friction plates and pressure plates disposed between the first and second pressure plates and arranged alternately.

[0021] Preferably, the first end cover is also rotatably provided with a first outer hub, the first outer hub rotates synchronously with the second input gear, and the first clutch assembly includes a first pressure plate connected to the first shaft, a second pressure plate connected to the hub, and friction plates and pressure plates disposed between the first pressure plate and the second pressure plate and arranged alternately.

[0022] Preferably, the second input gear rotates in the opposite direction to the main input gear.

[0023] According to another aspect of the present invention, an agricultural work machine is provided, including the aforementioned transmission mechanism.

[0024] Compared with the prior art, the transmission structure and agricultural machine provided by this utility model have the following beneficial effects: This utility model changes the existing clutch spring and shaft retaining ring from a limiting retaining ring to a thrust bearing, which not only ensures the function of the clutch spring, but also avoids wear between the clutch spring and the limiting retaining ring, thus ensuring the service life of the gearbox. Attached Figure Description

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0026] Figure 1 This is a schematic diagram of the transmission structure of this utility model when moving forward and backward;

[0027] Figure 2 This is a schematic diagram of the transmission structure of this utility model when turning left or right;

[0028] Figure 3 The thrust bearing (i.e., in the transmission structure of this utility model) Figure 1 A magnified view of a portion of region A in the middle;

[0029] Figure 4 The thrust bearing (i.e., in the transmission structure of this utility model) Figure 2 A magnified view of a portion of region B in the middle;

[0030] Figure 5 This is an exploded view of the main shaft, the first shaft, and the second shaft of this utility model;

[0031] Figure 6 This utility model relates to a first clutch assembly in a transmission structure (i.e., Figure 2 A magnified view of a portion of region C in the middle;

[0032] Figure 7 This is a schematic diagram of another transmission structure of the present invention during forward and backward movement;

[0033] Figure 8 This utility model relates to a first clutch assembly in a transmission structure (i.e., Figure 7 A magnified view of a portion of region D.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1a. First end cap; 1b. Second end cap;

[0036] 2. Main spindle; 21. Main input gear; 211a. First tooth groove; 211b. Second tooth groove;

[0037] 3a. First retaining ring; 3b. Second retaining ring;

[0038] 4a. First bearing; 4b. Second bearing;

[0039] 5a, First shaft; 5b, Second shaft; 51a, First output gear; 511a, First toothed gear; 51b, Second output gear; 511b, Second toothed gear; 52a, First shift block; 52b, Second shift block; 53a, First bushing; 53b, Second bushing; 54a, First step; 54b, Second step;

[0040] 6a. First clutch assembly; 6b. Second clutch assembly; 61. First pressure plate; 62. Second pressure plate; 63. Friction plate; 64. Pressure plate; 65a. First outer hub; 65b. Second outer hub; 66a. First input gear; 66b. Second input gear;

[0041] 7a. First elastic element; 7b. Second elastic element;

[0042] 8a. First thrust bearing; 8b. Second thrust bearing; 81. First contact surface; 82. Second contact surface; 83. Roller;

[0043] 9a, third retaining ring; 9b, fourth retaining ring. Detailed Implementation

[0044] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0045] To keep the drawings concise, only the parts relevant to this invention are shown schematically in each figure, and they do not represent the actual structure of the product. Furthermore, for ease of understanding, in some figures, only one of the components with the same structure or function is schematically depicted, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one."

[0046] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0047] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0048] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0049] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the specific implementation methods of this utility model will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0050] See appendix Figures 1 to 8 This embodiment discloses a transmission structure applied in the gearbox of a tracked harvester, which serves to brake and / or reduce the turning radius. The transmission structure includes: a main input gear 21, a main shaft 2, a first output assembly, and a second output assembly.

[0051] See appendix Figure 1 , 2 The main shaft 2 has a first end cover 1a and a second end cover 1b on both sides. A first bearing 4a is installed inside the first end cover 1a, and a second bearing 5b is installed on the second end cover 1b. The main shaft 2 is located between the first bearing 4a and the second bearing 5b, and the main shaft 2 can rotate relative to the first end cover 1a and the second end cover 1b. The main shaft 2 has a second retaining ring 3a and a second retaining ring 3b. A third retaining ring 9a is also installed inside the first end cover 1a, and a fourth retaining ring 9b is also installed inside the second end cover 1b. The inner ring of the first bearing 4a is limited by the second retaining ring 3a, and the outer ring of the first bearing 4a is limited by the third retaining ring 9a. The inner ring of the second bearing 5b is limited by the second retaining ring 3b, and the outer ring of the second bearing 5b is limited by the fourth retaining ring 9b.

[0052] See appendix Figure 1 , 27. The main input gear 21 is located in the middle of the main shaft 2 and rotates synchronously with the main shaft 2 and the main input gear 21. The main input gear 21 is rotatably connected to the previous stage transmission mechanism, thereby driving the main shaft 2 to rotate. The first output component is located on one side of the main shaft 2, and the second output component is located on the other side of the main shaft 2. The first output component and the second output component have the same structure and are symmetrically located on both sides of the main shaft 2. The first output component and the second output component transmit the power of the main shaft 2 to the two tracked harvester drive wheels respectively.

[0053] See appendix Figure 1 , 2 7. The first output component includes: a first shaft 5a, a first output gear 51a, a first clutch assembly 6a, a first thrust bearing 8a, and a first elastic element 7a. The first shaft 5a is loosely fitted onto the main shaft 2. The first shaft 5a moves towards the main input gear 21, causing the main shaft 2 to rotate synchronously with the first shaft 5a. The first shaft 5a also moves away from the main input gear 21, causing the main shaft 2 to rotate relative to the first shaft 5a. The first output gear 51a is mounted on the first shaft 5a and rotates synchronously with it. The first clutch assembly 6a is mounted on the first shaft 5a. When the first shaft 5a moves towards the main input gear 21, the first clutch assembly 6a disengages, and the first shaft 5a moves away from the main input gear 21. When the first clutch assembly 6a engages, it changes the rotational speed and / or direction of the first shaft 5a. The first thrust bearing 8a is mounted on the main shaft 2, and one side of the first thrust bearing 8a is fixed to the main shaft 2. The first elastic element 7a is sleeved on the main shaft 2 and is clearance-fitted with the main shaft 2. One end of the first elastic element 7a abuts against the first shaft 5a, and the other end of the first elastic element 7a abuts against the other side of the first thrust bearing 8a.

[0054] Similarly, the second output wheel assembly includes: a second shaft 5b, a second output gear 51b, a second clutch assembly 6b, a second thrust bearing 8b, and a second elastic element 7b. The second shaft 5b is loosely fitted onto the main shaft 2. When the second shaft 5b moves towards the second input gear 66b, the main shaft 2 rotates synchronously with the second shaft 5b. When the second shaft 5b moves away from the second input gear 66b, the main shaft 2 rotates relative to the second shaft 5b. The second output gear 51b is mounted on the second shaft 5b and rotates synchronously with it. The second clutch assembly 6b is mounted on the second shaft 5b. When the second shaft 5b moves towards the second input gear 66b, the second clutch assembly 6b disengages; when the second shaft 5b moves away from the second input gear 66b, the second clutch assembly 6b engages, thereby changing the rotational speed and / or direction of the second shaft 5b. The second thrust bearing 8b is mounted on the main shaft 2, and one side of the second thrust bearing 8b is fixed to the main shaft 2. The second elastic element 7b is sleeved on the main shaft 2 and is clearance-fitted with the main shaft 2. One end of the second elastic element 7b abuts against the second shaft 5b, and the other end of the first elastic element 7a abuts against the other side of the second thrust bearing 8b.

[0055] See appendix Figure 5 Both the main input gear 21 and the first output gear 51a are clutch gears. The main input gear 21 has a first tooth groove 211a on one side, and the first output gear 51a has a first toothed part 511a that cooperates with the first tooth groove 211a. The first shaft 5a has a first lever 52a. The first shaft 5a is driven to move along the main shaft 2 by the first lever 52a, so as to connect or disconnect the first tooth groove 211a and the first toothed part 511a.

[0056] Both the main input gear 21 and the second output gear 51b are clutch gears. The other side of the main input gear 21 is provided with a second tooth groove 211b. The second output gear 51b is provided with a second toothed part 511b that cooperates with the second tooth groove 211b. The second shaft 5b is provided with a second lever 52b. The second shaft 5b is driven to move along the main shaft 2 by the second lever 52b, so as to connect or disconnect the second tooth groove 211b and the second toothed part 511b.

[0057] See appendix Figure 1 , 2 7. The first shaft 5a is rotatably connected to the main shaft 2 via a first bushing 53a on the side near the main input gear 21. A first step 54a is provided on the side of the first shaft 5a away from the main input gear 21, and a first elastic element 7a is provided on the first step 54a. The second shaft 5b is rotatably connected to the main shaft 2 via a second bushing 53b on the side near the main input gear 21. A second step 54b is provided on the side of the second shaft 5b away from the main input gear 21, and a second elastic element 7b is provided on the second step 54b.

[0058] See appendix Figure 3 , 4 The first thrust bearing 8a includes a first contact surface 81, a second contact surface 82, and rollers 83 disposed between the first contact surface 81 and the second contact surface 82. The first contact surface 81 abuts against the second retaining ring 3a, and the second contact surface 82 abuts against the first elastic element 7a. The inner ring of the second contact surface 82 has a clearance fit with the main shaft 2. This means that the first elastic element 7a will rotate synchronously with the first shaft 5a within the first step 54a, thereby reducing the wear of the first elastic element 7a. Similarly, one side of the second thrust bearing 8b abuts against the second retaining ring 3b, and the other side of the second thrust bearing 8b abuts against the second elastic element 7b.

[0059] Compared to the existing clutch spring and the retaining ring between the shaft, the first thrust bearing 8a and the second thrust bearing 8b not only ensure the function of the clutch spring, but also avoid wear between the clutch spring and the retaining ring 8c, thus ensuring the service life of the gearbox.

[0060] The first clutch assembly 6a engages to change the speed and / or direction of rotation of the first shaft 5a. It can be understood that the first clutch assembly can create a speed difference between the first shaft 5a and the main shaft 2, while the second clutch assembly 6b is in an open state. The second shaft 5b in the second output assembly and the main shaft 2 still maintain the same speed, which in turn causes the drive wheels on both sides of the tracked harvester to form a speed difference, thereby realizing the steering of the tracked harvester.

[0061] In one embodiment, when the other side of the first clutch assembly 6a and the second clutch assembly is connected to the fixed end, specifically, the other side of the first clutch assembly 6a is connected to the first end cover 1a and the other side of the second clutch assembly is connected to the second end cover 1b, when both the first clutch assembly 6a and the second clutch assembly are disengaged, they can play a braking role. When the first clutch assembly 6a is disengaged and the second clutch assembly is engaged, they can reduce the turning radius.

[0062] See appendix Figure 6 Taking the first clutch assembly as an example, the first clutch assembly 6a includes a first pressure plate 61 connected to the first shaft 5a, a second pressure plate 62 connected to the first end cover 1a, and friction plates 63 and pressure plates 64 disposed between the first pressure plate 61 and the second pressure plate 62 and arranged alternately. When the first clutch assembly 6a is engaged and the second clutch assembly 6b is disengaged, a speed difference is formed between the drive wheels on both sides of the tracked harvester, thereby realizing the steering of the tracked harvester.

[0063] In another embodiment, the first end cover 1a is also rotatably provided with a first outer hub 65a, on which a first input gear 66a is provided and rotates synchronously with the first input gear 66a. The second end cover 1b is also rotatably provided with a second outer hub 65b, on which a second input gear 66b is provided and rotates synchronously with the second input gear 66b. The rotation direction of the first input gear 66a and the second input gear 66b is the same and opposite to the rotation direction of the main input gear 21.

[0064] See appendix Figure 8 Taking the first clutch assembly as an example, the first clutch assembly 6a includes a first pressure plate 61 connected to the first shaft 5a, a second pressure plate 62 connected to the first outer hub 65a, and friction plates 63 and pressure plates 64 disposed between the first pressure plate 61 and the second pressure plate 62 and arranged alternately. When the first clutch assembly 6a is engaged and the second clutch assembly 6b is disengaged, the drive wheels on both sides of the tracked harvester rotate in opposite directions. The first clutch assembly 6a can further reduce the turning radius of the tracked harvester, and even achieve the effect of turning on the spot.

[0065] It will be apparent to those skilled in the art that various modifications and variations can be made to the exemplary embodiments of the present invention without departing from the spirit and scope of the present invention. Therefore, it is intended that the present invention cover modifications and variations falling within the scope of the appended claims and their equivalents.

Claims

1. A transmission structure, characterized by, include: Main input gear; A main shaft that rotates synchronously with the main input gear, the main input gear being located at the middle of the main shaft; A first output component is disposed on one side of the spindle; The second output component is located on the other side of the main shaft. The first output component and the second output component have the same structure and are symmetrically arranged on both sides of the main shaft. The first output component includes: A first shaft is loosely fitted onto the main shaft. The first shaft moves to the side of the main input gear, and the main shaft rotates synchronously with the first shaft. The first shaft moves away from the main input gear, and the main shaft rotates relative to the first shaft. A first output gear is mounted on the first shaft and rotates synchronously with the first shaft. A first clutch assembly is mounted on a first shaft. When the first shaft moves to the side of the main input gear, the first clutch assembly disengages. When the first shaft moves away from the main input gear, the first clutch assembly engages to change the rotational speed and / or rotational direction of the first shaft. A first thrust bearing is disposed on the main shaft, and one side of the first thrust bearing is fixed to the main shaft; A first elastic element is sleeved on the main shaft and has a clearance fit with the main shaft. One end of the first elastic element abuts against the first shaft, and the other end of the first elastic element abuts against the other side of the first thrust bearing.

2. The transmission arrangement of claim 1, wherein The main input gear has a first tooth groove on one side, and the first output gear has a first toothed part that mates with the first tooth groove. The first shaft has a first pawl, which drives the first shaft to move along the main shaft to connect or disconnect the first tooth groove and the first toothed part.

3. The transmission arrangement of claim 1, wherein The first shaft is rotatably connected to the main shaft on the side closest to the main input gear via a first bushing. The first shaft is provided with a first step on the side furthest from the main input gear, and the first elastic element is provided on the first step.

4. The transmission arrangement of claim 1, wherein The main shaft is provided with a first end cover and a second end cover on both sides. The first end cover is provided with a first bearing, and the second end cover is provided with a second bearing. The main shaft is located between the first bearing and the second bearing.

5. The transmission arrangement of claim 4, wherein, The main shaft is provided with a first retaining ring, and the inner end cover is also provided with a third retaining ring. The inner ring of the first bearing is limited by the first retaining ring, and the outer ring of the first bearing is limited by the third retaining ring.

6. The transmission arrangement of claim 5, wherein, The first thrust bearing includes a first contact surface, a second contact surface, and a roller disposed between the first contact surface and the second contact surface. The first contact surface abuts against the first retaining ring, the second contact surface abuts against the first elastic element, and the inner ring of the second contact surface has a clearance fit with the main shaft.

7. The transmission arrangement of claim 4, wherein, The first clutch assembly includes a first pressure plate connected to the first shaft, a second pressure plate connected to the first end cover, and friction plates and pressure plates disposed between the first and second pressure plates and arranged alternately.

8. The transmission arrangement of claim 5, wherein, The first end cover is further provided with a first outer hub which rotates synchronously with the second input gear, and the first clutch assembly comprises a first pressure plate connected with the first shaft, a second pressure plate connected with the hub, a friction plate and a pressure plate which are arranged between the first pressure plate and the second pressure plate.

9. The transmission arrangement of claim 8, wherein, The second input gear rotates in the opposite direction of the main input gear.

10. An agricultural work machine characterized by comprising: The transmission structure comprises the transmission structure according to any one of claims 1 to 9.

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