Transmission case of header of two-gear silage machine

Abstract

The utility model discloses a header transmission case of a two-gear silage machine, which is characterized in that an input gear and a primary driving gear are arranged on a power input shaft, the input gear comprises a primary input cylindrical gear, a secondary input cylindrical gear and an input bevel gear, and the primary driving gear comprises a primary main gear first cylindrical gear and a primary main gear second cylindrical gear; the meshing sleeve is switched between the three states of meshing with the first-stage main gear first cylindrical gear, meshing with the first-stage input cylindrical gear and no-load. A first-stage driven gear and a second-stage driven gear are fixedly arranged on the second shaft, the first-stage driven gear is meshed with the first-stage main gear and the second cylindrical gear, and the second-stage driven gear is meshed with the second-stage input cylindrical gear; an output bevel gear is fixedly arranged on the power output shaft and meshed with the input bevel gear. Under the condition that the space is limited and the positions of the input shaft and the output shaft are restrained, two-gear speed change is achieved, and the production requirement is met.

Description

Technical Field

[0001] The present invention relates to the field of variable speed transmission, and in particular to a two-speed silage machine cutting platform transmission box. Background Art

[0002] With the development of animal husbandry industry, silage machine users hope that the cutting table can provide different speeds according to different crops. There are two structures of silage harvester cutting tables on the market: single-gear box input and motor-driven input. Single-gear box input can no longer meet user needs. Although motor-driven input can provide the speed required by users, the long-term stability of the speed cannot be guaranteed. At the same time, the later maintenance cost is too high. Therefore, these two structures cannot meet user needs well. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a novel two-speed silage machine cutting platform transmission box.

[0004] The specific technical solution of the utility model to solve the above technical problems is:

[0005] A two-speed silage machine cutting table transmission box, comprising a power input shaft and a power output shaft, wherein the power input shaft and the power output shaft are perpendicular to each other, an input gear and a primary driving gear are arranged on the power input shaft via a bearing sleeve, the input gear comprises a primary input cylindrical gear, a secondary input cylindrical gear and an input bevel gear which are fixedly connected, the primary driving gear comprises a primary main gear first cylindrical gear and a primary main gear second cylindrical gear; the primary input cylindrical gear and the primary main gear first cylindrical gear have the same diameter;

[0006] A meshing sleeve is also provided, the meshing sleeve is located between the primary input cylindrical gear and the first cylindrical gear of the primary main gear, and the meshing sleeve can slide along the axial direction of the power input shaft, the meshing sleeve is provided with a groove in the circumferential direction, a shift fork is slidably provided in the groove, and the shift fork is used to shift the meshing sleeve under the action of an external force, and the meshing sleeve is switched between the three states of meshing with the first cylindrical gear of the primary main gear, meshing with the primary input cylindrical gear, and no-load;

[0007] It also includes two shafts, the two shafts are parallel to the axis of the power input shaft, and a primary passive gear and a secondary passive gear are fixedly arranged on the two shafts, and the diameter of the primary passive gear is smaller than the diameter of the secondary passive gear; the primary passive gear is meshed with the second cylindrical gear of the primary main gear, and the secondary passive gear is meshed with the secondary input cylindrical gear;

[0008] An output bevel gear is fixedly provided on the power output shaft, and the output bevel gear is meshed with the input bevel gear.

[0009] Compared with the prior art, the present solution has the following beneficial effects: Under the limitations of space and input / output interface of the main transmission box of this utility model cutter bar, a brand-new second-gear route structure is adopted to meet the requirements of different rotational speeds of the gearbox. At the same time, the use of gear mechanical transmission can ensure high mechanical efficiency under different cutting speed requirements to ensure working stability.

[0010] Preferably, the diameter of the second cylindrical gear of the first-stage main gear is larger than the diameter of the first-stage passive gear.

[0011] The beneficial effect of adopting the above further technical solution is that the speed-up effect can be achieved, and a higher rotational speed of the output shaft than that of the input shaft can be realized.

[0012] Preferably, the shift fork is fixedly arranged on the shift pull rod. The axis of the shift pull rod is parallel to the axis of the power input shaft and can move along the axis to switch between high speed gear, neutral gear, and low speed gear.

[0013] The beneficial effect of adopting the above further technical solution is that shifting is achieved by pulling the shift pull rod. Compared with the structure of swinging left and right, it is more conducive to implementation mechanically. And the shift pull rod is located near the second shaft and the input shaft. The operation mode of pulling along the axis can reduce the operation risk and avoid the situation that once the hand slips under the structure of swinging left and right, it may touch the second shaft or the input shaft rotating at high speed.

[0014] Preferably, the shift pull rod is provided with limiting concave parts. The limiting concave parts include a low-speed limiting concave, a neutral gear limiting concave, and a high-speed limiting concave. The box body is also provided with an elastic limiting rod. The position of the elastic limiting rod corresponds to the limiting concave parts. When the low-speed limiting concave corresponds to the elastic limiting rod, the shift fork meshes with the first cylindrical gear of the first-stage input gear. When the neutral gear limiting concave corresponds to the elastic limiting rod, the shift fork is in the neutral gear state, that is, the no-load state. When the high-speed limiting concave corresponds to the elastic limiting rod, the shift fork meshes with the first cylindrical gear of the first-stage main gear. Thus, the cooperation of the elastic limiting rod with the low-speed limiting concave, the neutral gear limiting concave, and the high-speed limiting concave enables the shift pull rod to be stably in the set position, and further enables the entire transmission box to be stably in the low speed gear, neutral gear, or high speed gear state.

[0015] The beneficial effect of adopting the above further technical solution is that it has a clear gear engagement feeling and can be stably in the corresponding gear without external force.

[0016] Preferably, the shift pull rod is provided with an operation part convenient for manual operation on the outside of the housing.

[0017] Preferably, the operation part is a pull ring. The pull ring operation is suitable for the pulling operation action and is more convenient.

[0018] Preferably, the power input shaft, the second shaft, and the power output shaft are respectively arranged on the housing through bearings.

[0019] Preferably, a large-diameter portion is further provided between the first-stage driven gear and the second-stage driven gear on the second shaft, and the large-diameter portion is used to limit the positions of the first-stage driven gear and the second-stage driven gear.

[0020] The beneficial effect of adopting the above further technical solution is to ensure the stability of the relative positions of the first-stage driven gear and the second-stage driven gear.

[0021] Preferably, a lubricating oil hole is further provided on the input bevel gear for supplying lubricating oil to the bearing between the input bevel gear and the power input shaft to ensure smooth rotation.

[0022] In the present utility model, a form of integrated welding of cylindrical gears and driving bevel gears is adopted to ensure the reliability of the gearbox in use and the stability of efficiency transmission to the greatest extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the external structure of the transmission box of the second-gear forage harvester cutter head of the present utility model;

[0024] Figure 2 It is a schematic diagram of the internal transmission mechanism of the transmission box of the second-gear forage harvester cutter head of the present utility model;

[0025] Figure 3 It is a schematic diagram of the detailed structure of the shift paddle position of the transmission box of the second-gear forage harvester cutter head of the present utility model;

[0026] Figure 4 is Figure 2 the enlarged view at A in

[0027] Figure 5 It is a schematic diagram of the detailed structure of the input gear in the transmission box of the second-gear forage harvester cutter head of the present utility model;

[0028] Figure 6 It is a schematic diagram of the detailed structure of the output bevel gear in the transmission box of the second-gear forage harvester cutter head of the present utility model.

[0029] In the drawings, the list of the component names represented by each reference numeral is as follows:

[0030] 1. Power input shaft; 2. Input gear; 21. Primary input cylindrical gear; 22. Secondary input cylindrical gear; 23. Input bevel gear; 3. Output bevel gear; 4. Engaging sleeve; 5. Primary driving gear; 51. Primary main gear first cylindrical gear; 52. Primary main gear second cylindrical gear; 6. Primary passive gear; 7. Secondary passive gear; 8. Second shaft; 9. Shift fork; 10. Power output shaft; 11. Shift pull rod; 111. Low speed limit recess; 112. Neutral limit recess; 113. High speed limit recess; 12. Elastic limit rod; 13. Operating part; 14. Large diameter part; 15. Lubricating oil hole. DETAILED DESCRIPTION

[0031] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0032] A two-speed silage machine cutting table transmission box, comprising a power input shaft 1 and a power output shaft 10, wherein the power input shaft 1 and the power output shaft 10 are perpendicular to each other, an input gear 2 and a first-stage driving gear 5 are arranged on the power input shaft 1 via a bearing sleeve, the input gear 2 comprises a first-stage input cylindrical gear 21, a second-stage input cylindrical gear 22 and an input bevel gear 23 which are fixedly connected, and the first-stage driving gear 5 comprises a first-stage main gear first cylindrical gear 51 and a first-stage main gear second cylindrical gear 52; the first-stage input cylindrical gear 21 and the first-stage main gear first cylindrical gear 51 have the same diameter;

[0033] A meshing sleeve 4 is also provided, and the meshing sleeve 4 is located between the primary input cylindrical gear 21 and the primary main gear first cylindrical gear 51, and the meshing sleeve 4 can slide axially along the power input shaft 1, and a groove is circumferentially provided on the meshing sleeve 4, and a shift fork 9 is slidably provided in the groove, and the shift fork 9 is used to shift the meshing sleeve 4 under the action of an external force, and the meshing sleeve 4 is switched between the three states of meshing with the primary main gear first cylindrical gear 51, meshing with the primary input cylindrical gear 21, and no-load;

[0034] It also includes two shafts 8, which are parallel to the axis of the power input shaft 1, and are fixed with a primary passive gear 6 and a secondary passive gear 7, and the diameter of the primary passive gear 6 is smaller than the diameter of the secondary passive gear 7; the primary passive gear 6 is meshed with the primary main gear second cylindrical gear 52, and the secondary passive gear 7 is meshed with the secondary input cylindrical gear 22;

[0035] An output bevel gear 3 is fixedly provided on the power output shaft 10 , and the output bevel gear 3 is meshed with the input bevel gear 23 .

[0036] In this embodiment, specifically, the diameter of the first-stage main gear second cylindrical gear 52 is greater than the diameter of the first-stage driven gear 6 .

[0037] In this embodiment, specifically, the shift fork 9 is fixedly arranged on the shift pull rod 11. The axis of the shift pull rod 11 is parallel to the axis of the power input shaft 1 and can move along the axis direction to switch between high gear, neutral gear, and low gear.

[0038] In this embodiment, specifically, the shift pull rod 11 is provided with limiting concave portions, including a low-speed limiting concave portion 111, a neutral gear limiting concave portion 112, and a high-speed limiting concave portion 113. The box body is also provided with an elastic limiting rod 12. The position of the elastic limiting rod 12 corresponds to the limiting concave portions. By pushing and pulling the shift pull rod 11, the cooperation between the elastic limiting rod 12 and each limiting concave portion is realized. Specifically, when the low-speed limiting concave portion 111 corresponds to the elastic limiting rod 12, the shift fork 9 meshes with the first-stage input cylindrical gear 21. When the neutral gear limiting concave portion 112 corresponds to the elastic limiting rod 12, the shift fork 9 is in the neutral gear state. When the high-speed limiting concave portion 113 corresponds to the elastic limiting rod 12, the shift fork 9 meshes with the first cylindrical gear 51 of the first-stage main gear. Thus, the cooperation between the elastic limiting rod 12 and the low-speed limiting concave portion 111, the neutral gear limiting concave portion 112, and the high-speed limiting concave portion 113 enables the shift pull rod 11 to be stably in position, and further enables the entire transmission box to be stably in the low gear, neutral gear, or high gear state.

[0039] In this embodiment, specifically, an operation portion 13 convenient for manual operation is provided on the shift pull rod 11 located outside the housing.

[0040] In this embodiment, specifically, the operation portion 13 is a pull ring.

[0041] In this embodiment, specifically, the power input shaft 1, the second shaft 8, and the power output shaft 10 are respectively arranged on the housing through bearings.

[0042] In this embodiment, specifically, a large-diameter portion 14 is further provided between the first-stage driven gear 6 and the second-stage driven gear 7 on the second shaft 8. The large-diameter portion 14 is used to limit the positions of the first-stage driven gear 6 and the second-stage driven gear 7.

[0043] In this embodiment, specifically, a lubricating oil hole 15 is further provided on the input bevel gear 23 for supplying lubricating oil to the bearing between the input bevel gear 23 and the power input shaft 1.

[0044] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A two-speed silage machine header transmission box, comprising a power input shaft (1) and a power output shaft (10), characterized in that: The power input shaft (1) and the power output shaft (10) are perpendicular to each other. An input gear (2) and a first-stage driving gear (5) are arranged on the power input shaft (1) via a bearing sleeve. The input gear (2) comprises a first-stage input cylindrical gear (21), a second-stage input cylindrical gear (22) and an input bevel gear (23) which are fixedly connected. The first-stage driving gear (5) comprises a first-stage main gear first cylindrical gear (51) and a first-stage main gear second cylindrical gear (52). The first-stage input cylindrical gear (21) and the first-stage main gear first cylindrical gear (51) have the same diameter. A meshing sleeve (4) is also provided, the meshing sleeve (4) being located between the primary input cylindrical gear (21) and the primary main gear first cylindrical gear (51), and the meshing sleeve (4) being able to slide axially along the power input shaft (1), the meshing sleeve (4) being provided with a groove in the circumferential direction, a shift fork (9) being slidably provided in the groove, the shift fork (9) being used to shift the meshing sleeve (4) under the action of an external force, and enabling the meshing sleeve (4) to switch between three states: meshing with the primary main gear first cylindrical gear (51), meshing with the primary input cylindrical gear (21), and being unloaded; It also includes two shafts (8), the two shafts (8) are parallel to the axis of the power input shaft (1), a primary passive gear (6) and a secondary passive gear (7) are fixedly provided on the two shafts (8), and the diameter of the primary passive gear (6) is smaller than the diameter of the secondary passive gear (7); the primary passive gear (6) is meshed with the second cylindrical gear (52) of the primary main gear, and the secondary passive gear (7) is meshed with the secondary input cylindrical gear (22); An output bevel gear (3) is fixedly provided on the power output shaft (10), and the output bevel gear (3) is meshed with the input bevel gear (23).

2. The two-speed silage machine header transmission box according to claim 1, characterized in that: The diameter of the first-stage main gear second cylindrical gear (52) is greater than the diameter of the first-stage driven gear (6).

3. The two-speed silage machine header transmission box according to claim 2, characterized in that: The shift fork (9) is fixed on the shift pull rod (11), the axis of the shift pull rod (11) is parallel to the axis of the power input shaft (1), and can move along the axis direction to switch between high gear, neutral gear and low gear.

4. The second-speed silage machine header transmission box according to claim 3, characterized in that: The shift pull rod (11) is provided with a limiting recess, and the limiting recess includes a low-speed limiting recess (111), a neutral limiting recess (112), and a high-speed limiting recess (113). The housing is also provided with an elastic limiting rod (12), and the position of the elastic limiting rod (12) corresponds to the limiting recess. When the low-speed limiting recess (111) corresponds to the elastic limiting rod (12), the shift fork (9) meshes with the primary input cylindrical gear (21), and the neutral limiting recess (112) meshes with the elastic limiting rod (113). 2) corresponds, the shift fork (9) is in a neutral gear state, and when the high-speed limit recess (113) corresponds to the elastic limit rod (12), the shift fork (9) is meshed with the first cylindrical gear (51) of the primary main gear, thereby the elastic limit rod (12) cooperates with the low-speed limit recess (111), the neutral gear limit recess (112), and the high-speed limit recess (113) to stably position the shift pull rod (11) in a set position, thereby stably placing the entire transmission box in a low-speed gear, neutral gear, or high-speed gear state.

5. The second-speed silage machine header transmission box according to claim 4, characterized in that: The shift pull rod (11) is located outside the housing and is provided with an operating portion (13) that is convenient for manual operation.

6. The second-speed silage machine header transmission box according to claim 5, characterized in that: The operating portion (13) is a pull ring.

7. The two-speed silage machine header transmission box according to any one of claims 1 to 3, characterized in that: The power input shaft (1), the second shaft (8) and the power output shaft (10) are respectively arranged on the housing via bearings.

8. The two-speed silage machine header transmission box according to any one of claims 1 to 3, characterized in that: A large diameter portion (14) is also provided between the first-stage passive gear (6) and the second-stage passive gear (7) on the second shaft (8), and the large diameter portion (14) is used to limit the positions of the first-stage passive gear (6) and the second-stage passive gear (7).

9. The two-speed silage machine header transmission box according to any one of claims 1 to 3, characterized in that: The input bevel gear (23) is also provided with a lubricating oil hole (15) for supplying lubricating oil to the bearing between the input bevel gear (23) and the power input shaft (1).

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