A speed change mechanism

Abstract

The utility model discloses a speed change mechanism, comprising a shell, wherein a first clutch and a second clutch are arranged in the shell, a working part is arranged at an output end of the first clutch, a walking mechanism is arranged at an output end of the second clutch, and the first clutch and the second clutch are transmission-connected. By arranging the first clutch and the second clutch, the first clutch and the second clutch are transmission-connected and separately connected with the walking mechanism and the working part, thereby realizing separate control of the working part and the walking mechanism, avoiding the problem that the engine speed is low at the start causing the harvesting speed to be low or the working part also slows down when encountering an obstacle and the walking part slows down, thereby improving the harvesting effect, realizing that one engine directly controls the operation of the walking mechanism and the working part, but the walking mechanism and the working part can be disconnected from or directly connected to the power without affecting each other, thereby improving the harvesting effect at the start and when encountering obstacles.

Description

Technical Field

[0001] The utility model belongs to the field of agricultural machinery, in particular to a speed change mechanism. Background Art

[0002] The lawn mowers and harvesters currently on the market generally use a clutch to control the power input of the speed change mechanism. When harvesting, a high speed is required. If a clutch is controlled at the same time, it is easy for the working part and the walking part to affect each other.

[0003] For example: when the clutch controls the machine to start smoothly, the engine speed is low, the harvesting speed is low, and poor harvesting is likely to occur;

[0004] On the other hand, when encountering obstacles (such as encountering a ditch and needing to turn), the clutch controls the machine to slow down, the walking part slows down, and the working part also slows down, which can easily lead to poor harvesting.

[0005] To this end, our company has developed a speed change mechanism in which the working part and the traveling part do not affect each other during starting and deceleration. Utility Model Content

[0006] In view of the above problems, the utility model designs a speed change mechanism, including a housing, characterized in that a first clutch and a second clutch are arranged in the housing, a working part is arranged at the output end of the first clutch, a traveling mechanism is arranged at the output end of the second clutch, and the first clutch and the second clutch are connected in transmission.

[0007] Compared with the prior art, the utility model has the following beneficial effects: by providing a first clutch and a second clutch, the first clutch and the second clutch are connected in transmission, and are separately connected with the traveling mechanism and the working part, so as to realize the separate control of the working part and the traveling mechanism, avoid the problem that the engine speed is low at the start causing the harvesting speed to be low or the working part also slows down when encountering obstacles to the walking part to slow down, improve the harvesting effect, realize that one engine directly controls the operation of the traveling mechanism and the working part, but the traveling mechanism and the working part can be disconnected or directly connected to the power without affecting each other;

[0008] When starting, the traveling mechanism is in neutral, and the first clutch can be controlled to connect with the working part to make the working part run at high speed, and then the second clutch is started to connect with the traveling mechanism, thereby improving the harvesting effect at the start;

[0009] When encountering an obstacle, the speed of the walking mechanism is reduced, which does not affect the rotational speed of the input and output ends of the second clutch, thereby failing to affect the rotational speed of the input and output ends of the first clutch, thereby avoiding the problem that the walking part slows down and the working part also slows down, affecting the harvesting effect.

[0010] Further, the output end of the first clutch is provided with a first clutch power input shaft, the first clutch power input shaft is provided with a first clutch input tooth, the input end of the second clutch is provided with a second clutch power input shaft, the second clutch power input shaft is provided with a second clutch input tooth, and the first clutch input tooth is meshed with the second clutch input tooth;

[0011] Preferably, a power connecting chamber 1 is provided in the first clutch power input shaft.

[0012] The beneficial effect of adopting the above-mentioned further technical solution is: the first clutch input tooth at the input end of the first clutch is meshed with the second clutch input tooth provided at the input end of the second clutch, thereby realizing power transmission between the first clutch input tooth and the second clutch, and the engine is connected to the power connecting cavity of the first clutch, so that the engine drives the first clutch to rotate, realizes that the power directly drives the working part to operate first, and then transmits the power to the walking mechanism.

[0013] Furthermore, a power connecting part is also provided inside the shell, and the power connecting part includes a power connecting sleeve, and a power connecting cavity 2 is provided in the power connecting sleeve. Power supporting parts are provided at both ends of the power connecting sleeve, and power connecting teeth are provided between the power supporting parts at both ends. The power supporting parts are connected to the shell, and the power connecting teeth are respectively engaged with the first clutch input teeth and the second clutch input teeth.

[0014] The beneficial effects of adopting the above-mentioned further technical solution are as follows: by setting a power connecting member, the stability of power transmission between the first clutch and the second clutch can be increased, and the power transmission can be supported to avoid the instability of the power transmission process and the occurrence of displacement and dislocation. The power connecting teeth are respectively engaged with the first clutch input teeth and the second clutch input teeth to transmit power from the power connecting member in two transmission routes, thereby increasing the stability of power transmission between the first clutch and the second clutch respectively, avoiding the influence of the power of the working part and the power of the walking mechanism during the operation, realizing power distribution, and improving the stability of machine operation.

[0015] Furthermore, a front end transition piece is provided between the power connection piece and the first clutch, and the front end transition piece includes a front end transition shaft, on which a front end transition support piece and a front end transition tooth are provided, and the front end transition tooth is respectively engaged with the power connection tooth and the first clutch input tooth;

[0016] The beneficial effect of adopting the above-mentioned further technical solution is: by setting the front-end transition piece, the front-end transition teeth are respectively engaged with the power connection teeth and the first clutch input teeth, so that the direction and speed of the working part can be adjusted, which plays a role in buffering power transmission, reduces the impact and damage caused by the mismatch between the power of the working part and the power speed of the engine, protects the smooth output of power, and extends the service life of the machine.

[0017] Furthermore, a front box transition piece is arranged between the power connecting piece and the second clutch, and a front box transition support piece and a front box transition tooth are arranged on the front box transition shaft, and the front box transition tooth is respectively engaged with the power connecting tooth and the second clutch input tooth.

[0018] The beneficial effect of adopting the above-mentioned further technical solution is: by setting the front box transition teeth, the front box transition teeth are respectively engaged with the power connection teeth and the second clutch input teeth, so as to adjust the power transmission inside the buffer walking mechanism, reduce the impact and damage caused by the mismatch between the power transmission speed inside the walking mechanism and the engine power speed, protect the smooth output of power, and extend the service life of the machine.

[0019] Furthermore, a first clutch power input shaft support member 1 and a first clutch power input shaft support member 2 are provided on the first clutch power input shaft, and the first clutch input tooth is provided between the first clutch power input shaft support member 1 and the first clutch power input shaft support member 2.

[0020] The beneficial effect of adopting the above-mentioned further technical solution is: by arranging the first clutch input tooth between the first clutch power input shaft support member 1 and the first clutch power input shaft support member 2, the rotation of the first clutch power input shaft is supported, the stable transmission of the first clutch input tooth is ensured, and the stable input of power of the first clutch is ensured.

[0021] Furthermore, the first clutch power input shaft support member is arranged at the center of the first clutch power input shaft.

[0022] The beneficial effect of adopting the above further technical solution is: by setting the first clutch power input shaft support at the center of the first clutch power input shaft, the support center of gravity of the power input is at the center of the input shaft, avoiding bending of the power input shaft and further enhancing the stability of the power input.

[0023] Furthermore, a second clutch power input shaft support is provided on the second clutch power input shaft.

[0024] The beneficial effect of adopting the above further technical solution is: by arranging a second clutch power input shaft support on the second clutch power input shaft, the rotation of the second clutch power input shaft is supported, the stable transmission of the second clutch input teeth is ensured, and the stable input of power of the second clutch is ensured.

[0025] The power support, the front end transition support, the front box transition support, the first clutch power input shaft support 1, the first clutch power input shaft support 2, and the second clutch power input shaft support are all ball bearings.

[0026] Further, the length of the first clutch power input shaft is greater than the length of the second clutch power input shaft;

[0027] The front end transition tooth and the front box transition tooth are located on both sides of the power connection tooth. The power connection tooth is located at the lower side of the first clutch input tooth and at the front end of the second clutch input tooth.

[0028] The beneficial effects of adopting the above further technical solution are: by making the length of the first clutch power input shaft greater than the length of the second clutch power input shaft, the pressing parts of the first clutch and the second clutch are staggered, which is beneficial to reducing the space of the speed change mechanism;

[0029] The front end transition teeth and the front box transition teeth are located on both sides of the power connecting teeth. The power connecting teeth are located at the lower side of the first clutch input teeth and at the front end of the second clutch input teeth, thereby further reducing the space for power transmission and improving the stability of power distribution between the first clutch and the second clutch.

[0030] Furthermore, the walking mechanism includes a walking input mechanism, a gear shifting mechanism, and a walking output mechanism;

[0031] The power output end of the second clutch is provided with a traveling bevel gear, and the traveling bevel gear is transmission-connected with the traveling input mechanism.

[0032] The beneficial effects of adopting the above-mentioned further technical solution are as follows: a walking input mechanism, a gear shifting mechanism, a power transmission mechanism, and a walking output mechanism are arranged through the walking mechanism; the power is transmitted to the gear shifting mechanism through the walking input mechanism, and the gear shifting mechanism then transmits the power to the walking output mechanism, thereby realizing the power output of the walking mechanism; a walking bevel gear is arranged at the power output end of the second clutch and is transmission-connected with the walking input mechanism; when the gear shifting mechanism switches gears, it does not affect the rotation speed of the power transmission of the second clutch, nor does it affect the rotation speed of the power transmission of the first clutch. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 Schematic diagram of the speed change mechanism Figure 1 ;

[0034] Figure 2 Schematic diagram of the speed change mechanism Figure 2 ;

[0035] Figure 3 It is the structural schematic diagram of location A;

[0036] Figure 4 It is a schematic diagram of the structure at B;

[0037] Figure 5 Schematic diagram of the speed change mechanism Figure 3 ;

[0038] Figure 6 Schematic diagram of the speed change mechanism Figure 4 ;

[0039] Figure 7 Schematic diagram of the speed change mechanism Figure 5 ;

[0040] Figure 8 Schematic diagram of the speed change mechanism Figure 6 ;

[0041] Markings in the figure: 1. housing; 2. first clutch; 21. first clutch power input shaft; 22. first clutch input tooth; 23. first clutch power input shaft support member 1; 24. first clutch power input shaft support member 2; 25. power connection chamber 1; 3. second clutch; 31. second clutch power input shaft; 32. second clutch input tooth; 33. second clutch power input shaft support member; 34. travel bevel gear; 4. working part; 5. travel mechanism; 51. travel input mechanism; 52. shift mechanism; 53. travel output mechanism; 6. power connection member; 61. power connection sleeve; 62. power connection chamber 2; 63. power support member; 64. power connection tooth; 7. front end transition member; 71. front end transition shaft; 72. front end transition support member; 73. front end transition tooth; 8. front box transition member; 81. front box transition shaft; 82. front box transition support member; 83. front box transition tooth. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention.

[0043] This embodiment provides embodiment 1

[0044] See also Figure 1 and 8A speed change mechanism includes a housing 1, in which a first clutch 2 and a second clutch 3 are arranged, a working part 4 is arranged at the output end of the first clutch 2, a traveling mechanism 5 is arranged at the output end of the second clutch 3, and the first clutch 2 and the second clutch 3 are connected in transmission. By providing the first clutch 2 and the second clutch 3, the first clutch 2 and the second clutch 3 are connected in transmission, and are separately connected to the walking mechanism 5 and the working part 4, respectively, so as to realize the separate control of the working part 4 and the walking mechanism 5, avoid the problem that the engine speed is low at the start, resulting in a low harvesting speed, or the working part 4 also slows down when encountering obstacles. The harvesting effect is improved, and one engine directly controls the operation of the walking mechanism 5 and the working part 4, but the walking mechanism 5 and the working part 4 can be disconnected or directly connected to the power without affecting each other; when starting, the walking mechanism 5 is in neutral, and the first clutch 2 can be controlled to connect with the working part 4 first, so that the working part 4 runs at a high speed, and then the second clutch 3 is started, so that the second clutch 3 is connected with the walking mechanism 5, so as to improve the harvesting effect at the start; when encountering obstacles, the speed of the walking mechanism 5 is reduced, and the speed of the input and output ends of the second clutch 3 is not affected, so that the speed of the input and output ends of the first clutch 2 cannot be affected, thereby avoiding the problem that the walking part slows down and the working part 4 also slows down to affect the harvesting effect.

[0045] As an implementation method, see Figure 2-4 The output end of the first clutch 2 is provided with a first clutch power input shaft 21, on which a first clutch input tooth 22 is provided, and the input end of the second clutch 3 is provided with a second clutch power input shaft 31, on which a second clutch input tooth 32 is provided, and the first clutch input tooth 22 is meshed with the second clutch input tooth 32; preferably, a power connection cavity 25 is provided in the first clutch power input shaft 21. The first clutch input tooth 22 at the input end of the first clutch 2 is meshed with the second clutch input tooth 32 at the input end of the second clutch 3, thereby realizing the power transmission between the first clutch input tooth 22 and the second clutch 3, and the engine is connected to the power connection cavity 25 of the first clutch 2, thereby realizing that the engine drives the first clutch 2 to rotate, realizing that the power directly drives the working part 4 to operate first, and then transmits the power to the walking mechanism 5.

[0046] A power connection member 6 is also provided inside the shell 1, and the power connection member 6 includes a power connection sleeve 61, and a power connection cavity 62 is provided in the power connection sleeve 61. Power support members 63 are provided at both ends of the power connection sleeve 61, and power connection teeth 64 are provided between the power support members 63 at both ends. The power support member 63 is connected to the shell 1, and the power connection teeth 64 are respectively engaged with the first clutch input teeth 22 and the second clutch input teeth 32; by providing the power connection member 6, the stability of power transmission between the first clutch 2 and the second clutch 3 can be increased, and the power transmission can be supported to avoid the situation of unstable displacement and misalignment during the power transmission process. The power connection teeth 64 are respectively engaged with the first clutch input teeth 22 and the second clutch input teeth 32, and the power is transmitted from the power connection member 6 in two transmission routes, thereby increasing the stability of power transmission of the first clutch 2 and the second clutch 3, respectively, avoiding the influence of the power of the working part 4 and the power of the walking mechanism 5 during the operation process, realizing power distribution, and improving the stability of machine operation.

[0047] A front end transition piece 7 is arranged between the power connecting piece 6 and the first clutch 2, and the front end transition piece 7 includes a front end transition shaft 71, and a front end transition support piece 72 and a front end transition tooth 73 are arranged on the front end transition shaft 71, and the front end transition tooth 73 is respectively engaged with the power connecting tooth 64 and the first clutch input tooth 22; by arranging the front end transition piece 7, the front end transition tooth 73 is respectively engaged with the power connecting tooth 64 and the first clutch input tooth 22, so that the direction and speed of the working part 4 can be adjusted, which plays a role in buffering power transmission, reducing the impact and damage caused by the mismatch between the power of the working part 4 and the engine power speed, protecting the smooth output of power, and extending the service life of the machine.

[0048] A front box transition piece 8 is provided between the power connection piece 6 and the second clutch 3, and a front box transition support piece 82 and a front box transition tooth 83 are provided on the front box transition shaft 81, and the front box transition tooth 83 is respectively engaged with the power connection tooth 64 and the second clutch input tooth 32. By providing the front box transition tooth 83, the front box transition tooth 83 is respectively engaged with the power connection tooth 64 and the second clutch input tooth 32, so that the power transmission inside the buffer walking mechanism 5 can be adjusted, the impact and damage caused by the mismatch between the power transmission speed inside the walking mechanism 5 and the engine power speed can be reduced, the stable output of power is protected, and the service life of the machine is extended.

[0049] See also Figure 2-6The first clutch power input shaft 21 is provided with a first clutch power input shaft support member 1 23 and a first clutch power input shaft support member 2 24, and the first clutch input tooth 22 is arranged between the first clutch power input shaft support member 1 23 and the first clutch power input shaft support member 2 24. By arranging the first clutch input tooth 22 between the first clutch power input shaft support member 1 23 and the first clutch power input shaft support member 2 24, the rotation of the first clutch power input shaft 21 is supported, the stable transmission of the first clutch input tooth 22 is ensured, and the stable input of the power of the first clutch 2 is ensured.

[0050] The first clutch power input shaft support 23 is arranged at the center of the first clutch power input shaft 21. By arranging the first clutch power input shaft support 23 at the center of the first clutch power input shaft 21, the support center of gravity of the power input is at the center of the input shaft, avoiding the bending of the power input shaft, and further enhancing the stability of the power input.

[0051] The second clutch power input shaft 31 is provided with a second clutch power input shaft support 33, and the second clutch input tooth 32 is provided on the second clutch power input shaft 31. The second clutch power input shaft 31 is provided with the second clutch power input shaft support 33, so as to support the rotation of the second clutch power input shaft 31, ensure the stable transmission of the second clutch input tooth 32, and ensure the stable input of the power of the second clutch 3.

[0052] The power support member 63, the front end transition support member 72, the front box transition support member 82, the first clutch power input shaft support member 1 23, the first clutch power input shaft support member 24, and the second clutch power input shaft support member 33 are all ball bearings.

[0053] The length of the first clutch power input shaft 21 is greater than that of the second clutch power input shaft 31; the front transition teeth 73 and the front box transition teeth 83 are located on both sides of the power connection teeth 64, and the power connection teeth 64 are located at the lower side of the first clutch input teeth 22 and at the front end of the second clutch input teeth 32. By making the length of the first clutch power input shaft 21 greater than that of the second clutch power input shaft 31, the pressing parts of the first clutch 2 and the second clutch 3 are staggered, which is beneficial to reducing the space of the speed change mechanism;

[0054] The front end transition teeth 73 and the front box transition teeth 83 are located on both sides of the power connecting teeth 64, and the power connecting teeth 64 are located on the lower side of the first clutch input teeth 22 and at the front end of the second clutch input teeth 32, thereby further reducing the space for power transmission and improving the stability of power distribution between the first clutch 2 and the second clutch 3.

[0055] See also Figure 5-Figure 7The walking mechanism 5 includes a walking input mechanism 51, a shifting mechanism 52, and a walking output mechanism 53; the power output end of the second clutch 3 is provided with a walking bevel gear 34, and the walking bevel gear 34 is transmission-connected with the walking input mechanism 51. The walking input mechanism 51, the shifting mechanism 52, and the walking output mechanism 53 are provided through the walking mechanism 5, and the power is transmitted to the shifting mechanism 52 through the walking input mechanism 51, and the shifting mechanism 52 then transmits the power to the walking output mechanism 53, thereby realizing the power output of the walking mechanism 5. The walking bevel gear 34 is transmission-connected with the walking input mechanism 51 through the power output end of the second clutch 3. When the shifting mechanism 52 switches gears, it does not affect the speed of the power transmission of the second clutch 3, nor does it affect the speed of the power transmission of the first clutch 2.

[0056] The above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit them; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above embodiments, or replace some of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims

1. A speed change mechanism, comprising a housing (1), characterized in that: A first clutch (2) and a second clutch (3) are arranged in the housing (1); a working part (4) is arranged at the output end of the first clutch (2); a running mechanism (5) is arranged at the output end of the second clutch (3); and the first clutch (2) and the second clutch (3) are connected in transmission.

2. The speed change mechanism according to claim 1, characterized in that: The output end of the first clutch (2) is provided with a first clutch power input shaft (21), and the first clutch power input shaft (21) is provided with a first clutch input tooth (22); the input end of the second clutch (3) is provided with a second clutch power input shaft (31), and the second clutch power input shaft (31) is provided with a second clutch input tooth (32); the first clutch input tooth (22) is meshed with the second clutch input tooth (32).

3. The speed change mechanism according to claim 2, characterized in that: A power connection chamber 1 (25) is provided in the first clutch power input shaft (21).

4. The speed change mechanism according to claim 2, characterized in that: A power connection member (6) is also provided inside the housing (1), and the power connection member (6) comprises a power connection sleeve (61), and a second power connection chamber (62) is provided inside the power connection sleeve (61). Power support members (63) are provided at both ends of the power connection sleeve (61), and power connection teeth (64) are provided between the power support members (63) at both ends. The power support members (63) are connected to the housing (1), and the power connection teeth (64) are respectively engaged with the first clutch input teeth (22) and the second clutch input teeth (32).

5. The speed change mechanism according to claim 4, characterized in that: A front end transition piece (7) is arranged between the power connection piece (6) and the first clutch (2), and the front end transition piece (7) comprises a front end transition shaft (71), and a front end transition support piece (72) and a front end transition tooth (73) are arranged on the front end transition shaft (71), and the front end transition tooth (73) is respectively meshed with the power connection tooth (64) and the first clutch input tooth (22).

6. The speed change mechanism according to claim 4, characterized in that: A front box transition piece (8) is arranged between the power connection piece (6) and the second clutch (3); a front box transition support piece (82) and a front box transition tooth (83) are arranged on the front box transition shaft (81); and the front box transition tooth (83) is respectively meshed with the power connection tooth (64) and the second clutch input tooth (32).

7. The speed change mechanism according to claim 2, characterized in that: The first clutch power input shaft (21) is provided with a first clutch power input shaft support member 1 (23) and a first clutch power input shaft support member 2 (24), and the first clutch input tooth (22) is provided between the first clutch power input shaft support member 1 (23) and the first clutch power input shaft support member 2 (24).

8. The speed change mechanism according to claim 7, characterized in that: The first clutch power input shaft support member (23) is arranged at the center of the first clutch power input shaft (21).

9. The speed change mechanism according to claim 5, characterized in that: A second clutch power input shaft support (33) is provided on the second clutch power input shaft (31).

10. The speed change mechanism according to claim 9, characterized in that: The length of the first clutch power input shaft (21) is greater than the length of the second clutch power input shaft (31); The front transition teeth (73) and the front box transition teeth (83) are located on both sides of the power connection teeth (64), and the power connection teeth (64) are located on the lower side of the first clutch input teeth (22) and at the front end of the second clutch input teeth (32).

11. The speed change mechanism according to claim 1, characterized in that: The walking mechanism (5) comprises a walking input mechanism (51), a gear shifting mechanism (52), and a walking output mechanism (53); The power output end of the second clutch (3) is provided with a travel bevel gear (34), and the travel bevel gear (34) is transmission-connected to the travel input mechanism (51).

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