Belt wheel separation type gearbox

Abstract

The utility model belongs to the technical field of gearboxes, and discloses a belt wheel separation type gearbox which comprises an output shaft, one end of the output shaft is provided with a joint sleeve in a sliding mode, one end face of the joint sleeve is movably connected with a positioning plate, the positioning plate is installed at the end of the output shaft in a rotating mode at the same time, and the outer surface of the joint sleeve is connected with a shifting set in a sleeved mode. A belt pulley is fixedly installed on the end face, away from the joint sleeve, of the positioning plate and rotationally installed at the end of the output shaft at the same time. The gearbox is simple in overall structure, external output power of the gearbox can be cut off at any time in the using process of the pesticide sprayer, mechanical abrasion is reduced, power consumption is reduced, and the using effect is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of gearboxes, and in particular relates to a pulley-separated gearbox. Background Art

[0002] With the continuous advancement of modern mechanical transmission technology, the performance and structure of the gearbox, as a key component of the transmission system, directly affect the operating efficiency, reliability and safety of mechanical equipment. Especially in some applications that require frequent starting, stopping and speed change, such as automobiles, construction machinery, agricultural machinery and other fields, higher requirements are placed on the response speed of the gearbox, the smoothness of power transmission and the control of energy loss.

[0003] Among agricultural machinery, the application of sprayers is increasing day by day. The improvement of their performance and efficiency is of great significance to improving agricultural production efficiency, reducing the use of pesticides and protecting the ecological environment.

[0004] During the use of the sprayer, power is often transmitted to key parts of the sprayer such as the pump or compressor through the power device to complete the extraction, pressurization and transportation of the liquid medicine; the power device is usually provided by a motor and a gearbox. During the spraying process, it is often encountered that the liquid medicine cannot be sucked up or the flow is insufficient due to the blockage of the water absorption filter, the oil tank or the oil pipeline leaks due to damage or aging, and the nozzle nozzle is blocked or worn, resulting in uneven spray or no mist, etc. At this time, routine operations often require shutting down the power device of the sprayer and dealing with the oil leakage. When dealing with other problems, the power device is often not shut down and the blocked hole is not cleaned, which can easily cause mechanical rotation wear. When the problem is solved, the surrounding staff may be easily injured by the sudden gushing of liquid medicine, and at the same time increase the power loss, inconvenience in operation, and cause energy waste. Utility Model Content

[0005] The main technical problem to be solved by the utility model is to provide a pulley separation gearbox with a simple overall structure, which can cut off the external output power of the gearbox at any time during the use of the sprayer, reduce mechanical wear, reduce power consumption, and improve the use effect.

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0007] A pulley separation gearbox comprises an output shaft, one end of which is slidably mounted with a coupling sleeve, one end surface of which is movably connected with a positioning plate, which is rotatably mounted at the end of the output shaft, a shifting group is sleeved on the outer surface of the coupling sleeve, a pulley is fixedly mounted on the end surface of the positioning plate away from the coupling sleeve, and the pulley is rotatably mounted at the end of the output shaft;

[0008] The shifting group includes a fork plate sleeved on the outer surface of the engaging sleeve. A fork shaft is vertically arranged at the end of the fork plate. A bush is sleeved on the outer surface of the fork shaft, and the bush is fixedly installed on the outer shell of the reduction gearbox. The fork shaft is simultaneously slidably connected in the bush.

[0009] The following is the further optimization of the above technical solution by the present utility model:

[0010] A spline is provided on the outer surface of the output end of the output shaft, and the engaging sleeve is slidably installed on the spline.

[0011] Further optimization: A key groove is opened at a position corresponding to the spline in the middle of the engaging sleeve, and the key groove model matches the spline model.

[0012] Further optimization: Symmetrically arranged first transmission engagement grooves are opened on one end face of the engaging sleeve close to the positioning plate, and a first braking platform is arranged between the two first transmission engagement grooves.

[0013] Further optimization: An annular groove is annularly opened on the outer surface of the engaging sleeve near the edge, and the fork plate is sleeved in the annular groove.

[0014] Further optimization: An avoidance hole is opened at a position corresponding to the key groove in the middle of the positioning plate, and the aperture of the avoidance hole is larger than the outer diameter of the spline.

[0015] Further optimization: Two symmetrically arranged second transmission engagement grooves are opened on the end face of the positioning plate corresponding to the engaging sleeve. The positions of the second transmission engagement grooves correspond to the first braking platforms respectively, and the groove shape size of the second transmission engagement groove is larger than the outer shape size of the first braking platform.

[0016] Further optimization: A second braking platform is arranged between the two second transmission engagement grooves. The positions of the two second braking platforms correspond to the first transmission engagement grooves respectively at the same time, and the groove shape size of the first transmission engagement groove is larger than the outer shape size of the second braking platform.

[0017] Further optimization: A fork seat is fixedly installed at the end of the fork plate far from the engaging sleeve. A spring baffle is fixedly installed on the other end face of the fork seat. The fork shaft simultaneously penetrates through the spring baffle. A spring is sleeved at the middle position of the outer surface of the fork shaft. One end of the spring abuts against the spring baffle, and the other end of the spring abuts against the end face of the bush close to the spring baffle.

[0018] By adopting the above technical solution, the present utility model has a clever concept and a reasonable structure. In the use of agricultural machinery such as a pesticide spraying machine, it can control the power output of the gearbox in real time, avoid the wear generated by the belt rotating on the pulley, reduce power consumption, expand the scope of use, be convenient to use, safe and reliable, easy to operate, and the overall structure is simple, convenient for manufacturing and production, capable of reducing production and use costs, and improving economic benefits.

[0019] When the gearbox does not require power output, shift the gear lever. The engaging sleeve is driven by the shift fork shaft to slide away from the pulley, and then the engaging sleeve is separated from the positioning plate on the pulley, cutting off the output power of the output shaft. The operation is convenient. When power output transmission is required, release the gear lever. Under the elastic force of the spring, the shift fork shaft drives the engaging sleeve to contact the positioning plate, driving the pulley to rotate and realizing power output. In various usage conditions of the medicine spraying machine, it can freely cut off power output, reduce mechanical wear and power consumption, and the whole process is easy to operate.

[0020] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments. Description of the Drawings

[0021] Figure 1 is a schematic diagram of the overall structure in the embodiment of the present utility model;

[0022] Figure 2 is a right view of the overall structure in the embodiment of the present utility model;

[0023] Figure 3 is a sectional view taken along line A-A in the embodiment of the present utility model;

[0024] Figure 4 is a sectional view taken along line B-B in the embodiment of the present utility model;

[0025] Figure 5 is a schematic diagram of the structure of the engaging sleeve in the embodiment of the present utility model;

[0026] Figure 6 is a schematic diagram of the structure of the positioning plate in the embodiment of the present utility model.

[0027] In the figure: 1. Output shaft; 11. Spline; 2. Engaging sleeve; 21. Keyway; 22. Annular groove; 23. First transmission engagement groove; 24. First braking platform; 3. Positioning plate; 31. Step hole; 32. Avoidance hole; 33. Second transmission engagement groove; 34. Second braking platform; 4. Pulley; 41. Deep groove ball bearing; 42. Bearing baffle; 43. Locking bolt; 44. Straight-through grease nipple; 5. Shifting group; 51. Shift fork plate; 52. Shift fork seat; 521. Gear lever hole; 53. Shift fork shaft; 54. Bush; 55. Spring; 56. Fixed connection frame; 57. Spring baffle. Detailed Embodiment

[0028] As Figure 1-6As shown: a pulley separation type gearbox, comprising an output shaft 1, a coupling sleeve 2 is slidably mounted on one end of the output shaft 1, a positioning plate 3 is movably connected to one end surface of the coupling sleeve 2, the positioning plate 3 is rotatably mounted at the end of the output shaft 1, a toggle group 5 is sleeved on the outer surface of the coupling sleeve 2, a pulley 4 is fixedly mounted on the end surface of the positioning plate 3 away from the coupling sleeve 2, and the pulley 4 is rotatably mounted at the end of the output shaft 1;

[0029] The shifting group 5 includes a fork plate 51 sleeved on the outer surface of the coupling sleeve 2, a fork shaft 53 is vertically arranged at the end of the fork plate 51, a shaft sleeve 54 is sleeved on the outer surface of the fork shaft 53, the shaft sleeve 54 is fixedly mounted on the reduction box housing, and the fork shaft 53 is slidably connected in the shaft sleeve 54.

[0030] In this embodiment, the output shaft 1 is a power output shaft of a reduction gearbox, a spline 11 is provided on the outer surface of the output end of the output shaft 1 , and the engagement sleeve 2 is slidably mounted on the spline 11 .

[0031] like Figure 5 As shown, a keyway 21 is provided in the middle of the coupling sleeve 2 at a position corresponding to the spline 11 , and the model of the keyway 21 matches the model of the spline 11 .

[0032] The coupling sleeve 2 slides on the spline 11 through the keyway 21. With this design, when the output shaft 1 rotates, the coupling sleeve 2 can be driven to rotate simultaneously.

[0033] The coupling sleeve 2 is provided with symmetrically arranged first transmission coupling grooves 23 on one end surface close to the positioning plate 3 .

[0034] A first brake platform 24 is disposed between the two first transmission coupling grooves 23 .

[0035] An annular groove 22 is formed on the outer surface of the coupling sleeve 2 near the edge, and the shift fork plate 51 is sleeved in the annular groove 22 .

[0036] like Figure 6 As shown, a avoidance hole 32 is opened at a position in the middle of the positioning plate 3 corresponding to the keyway 21 , and the diameter of the avoidance hole 32 is larger than the outer diameter of the spline 11 .

[0037] The positioning plate 3 is sleeved on the output shaft 1 through the avoidance hole 32 .

[0038] The end surface of the positioning plate 3 opposite to the coupling sleeve 2 is provided with a plurality of stepped holes 31 in a circular array, and first bolts are inserted into the plurality of stepped holes 31 .

[0039] The belt pulley 4 is provided with threaded holes at positions corresponding to the step holes 31 .

[0040] That is, the positioning plate 3 and the pulley 4 are fixed together by the first bolt.

[0041] The end surface of the positioning plate 3 corresponding to the coupling sleeve 2 is provided with two symmetrically arranged second transmission coupling grooves 33 .

[0042] The positions of the second transmission coupling grooves 33 correspond to the first brake platforms 24 , respectively, and the groove dimensions of the second transmission coupling grooves 33 are larger than the outer dimensions of the first brake platforms 24 .

[0043] A second brake platform 34 is disposed between the two second transmission coupling grooves 33 , and the positions of the two second brake platforms 34 correspond to the first transmission coupling grooves 23 respectively.

[0044] The groove dimension of the first transmission coupling groove 23 is larger than the outer dimension of the second brake platform 34 .

[0045] With this design, when the engagement sleeve 2 slides on the spline 11 toward the direction close to the positioning plate 3, when the two first brake platforms 24 of the engagement sleeve 2 slide into the second transmission coupling groove 33, at this time, the second brake platform 34 of the positioning plate 3 enters the first transmission coupling groove 23 of the engagement sleeve 2, and the output shaft 1 drives the engagement sleeve 2 to rotate, and at the same time drives the positioning plate 3 and the pulley 4 to rotate;

[0046] The coupling sleeve 2 slides on the spline 11 in the direction away from the positioning plate 3, so that the first brake platform 24 of the coupling sleeve 2 disengages from the second transmission coupling groove 33. At this time, the second brake platform 34 of the positioning plate 3 disengages from the first transmission coupling groove 23 at the same time. When the output shaft 1 drives the coupling sleeve 2 to rotate, the positioning plate 3 and the pulley 4 do not rotate accordingly. The power output of the pulley 4 is controlled according to the power demand, and the operation is simple.

[0047] like Figure 1 , Figure 3 As shown together, a circular hole is provided at the end of the shift fork plate 51 that is sleeved with the coupling sleeve 2 , that is, the shift fork plate 51 cooperates with the annular groove 22 through the circular hole to realize the rotation of the shift fork plate 51 on the annular groove 22 .

[0048] A fork seat 52 is fixedly mounted at the end of the fork plate 51 away from the coupling sleeve 2 , and a lever hole 521 is opened on the upper surface of the fork seat 52 .

[0049] A gear handle is installed in the gear handle hole 521 , and the installation method of the gear handle is well known in the prior art and will not be described in detail here.

[0050] In this embodiment, the shift lever can shift the shift fork plate 51 , thereby driving the engagement sleeve 2 to slide left and right on the output shaft 1 , thereby achieving contact and separation between the engagement sleeve 2 and the positioning plate 3 .

[0051] A second bolt is threadedly connected to the upper end surface of the shift fork seat 52 near the position of the shift lever hole 521, and the second bolt is simultaneously threadedly connected to the shift fork shaft 53, that is, the shift fork shaft 53 is fixedly connected to the shift fork shaft 53 through the second bolt.

[0052] A spring baffle 57 is fixedly installed on the other end surface of the shift fork seat 52, and the shift fork shaft 53 simultaneously penetrates through the spring baffle 57.

[0053] A spring 55 is simultaneously sleeved on the middle position of the outer surface of the shift fork shaft 53. One end of the spring 55 abuts against the spring baffle 57, and the other end of the spring 55 abuts against the end surface of the bushing 54 near the spring baffle 57.

[0054] A fixed connection frame 56 is fixedly installed on the outer surface of the bushing 54, and the fixed connection frame 56 is simultaneously fixedly installed on the reducer housing.

[0055] With such a design, when the pulley 4 does not need to transmit power, the shift lever drives the shift fork plate 51, and then drives the engaging sleeve 2 to slide away from the positioning plate 3, driving the shift fork shaft 53 to slide in the bushing 54. At the same time, the spring baffle 57 compresses the spring 55; when the pulley 4 needs to transmit power, the shift lever is released, and under the elastic force of the spring 55, it drives the shift fork plate 51 and the engaging sleeve 2 to move towards the positioning plate 3. The output shaft 1 rotates to drive the engaging sleeve 2 to rotate, and then drives the positioning plate 3 to drive the pulley 4 to rotate, realizing the power transmission of the pulley 4.

[0056] A deep groove ball bearing 41 is fixedly installed at the end of the output shaft 1. An bearing baffle 42 is fixedly installed on the end surface of the end of the output shaft 1 through a locking bolt 43. The function of the bearing baffle 42 is to prevent the deep groove ball bearing 41 from falling off.

[0057] The pulley 4 is fixedly installed on the outer surface of the deep groove ball bearing 41, thus realizing the rotational connection of the pulley 4 at the end of the output shaft 1.

[0058] A straight-through grease nipple 44 is communicated with the position corresponding to the deep groove ball bearing 41 on the end surface of the pulley 4 away from the positioning plate 3. Grease is added into the deep groove ball bearing 41 through the straight-through grease nipple 44 to complete lubrication and improve the service life of the deep groove ball bearing 41.

[0059] For those of ordinary skill in the art, according to the teachings of the present invention, without departing from the principles and spirit of the present invention, the changes, modifications, substitutions and deformations made to the embodiments still fall within the protection scope of the present invention.

Claims

1. A pulley-type separation gearbox, comprising an output shaft (1), characterized in that: An engaging sleeve (2) is slidably mounted on one end of the output shaft (1); a positioning plate (3) is movably connected to one end surface of the engaging sleeve (2); the positioning plate (3) is rotatably mounted on the end of the output shaft (1); a shifting group (5) is sleeved on the outer surface of the engaging sleeve (2); a pulley (4) is fixedly mounted on the end surface of the positioning plate (3) away from the engaging sleeve (2); and the pulley (4) is rotatably mounted on the end of the output shaft (1); The shifting group (5) comprises a shift fork plate (51) sleeved on the outer surface of the engagement sleeve (2), a shift fork shaft (53) being arranged vertically at the end of the shift fork plate (51), a shaft sleeve (54) being sleeved on the outer surface of the shift fork shaft (53), the shaft sleeve (54) being fixedly mounted on the reduction gearbox housing, and the shift fork shaft (53) being slidably connected in the shaft sleeve (54).

2. A pulley-type separation gearbox according to claim 1, characterized in that: A spline (11) is provided on the outer surface of the output end of the output shaft (1), and the coupling sleeve (2) is slidably mounted on the spline (11).

3. A pulley-type separation gearbox according to claim 2, characterized in that: A keyway (21) is provided in the middle of the coupling sleeve (2) at a position corresponding to the spline (11), and the model of the keyway (21) matches the model of the spline (11).

4. A pulley-type separation gearbox according to claim 3, characterized in that: The coupling sleeve (2) is provided with symmetrically arranged first transmission coupling grooves (23) on one end surface close to the positioning plate (3), and a first brake platform (24) is provided between the two first transmission coupling grooves (23).

5. A pulley-type separation gearbox according to claim 4, characterized in that: An annular groove (22) is formed in an annular shape on the outer surface of the coupling sleeve (2) near the edge, and the shift fork plate (51) is sleeved in the annular groove (22).

6. A pulley-type separation gearbox according to claim 5, characterized in that: A avoidance hole (32) is provided at a position in the middle of the positioning plate (3) corresponding to the keyway (21), and the diameter of the avoidance hole (32) is larger than the outer diameter of the spline (11).

7. A pulley-type separation gearbox according to claim 6, characterized in that: The positioning plate (3) has two symmetrically arranged second transmission coupling grooves (33) on its end surface corresponding to the coupling sleeve (2), the positions of the second transmission coupling grooves (33) respectively corresponding to the first brake platform (24), and the groove dimensions of the second transmission coupling grooves (33) are larger than the outer dimensions of the first brake platform (24).

8. The pulley-type separation gearbox according to claim 7, characterized in that: A second brake platform (34) is disposed between the two second transmission coupling grooves (33), and the positions of the two second brake platforms (34) respectively correspond to the first transmission coupling grooves (23), and the groove dimensions of the first transmission coupling groove (23) are larger than the outer dimensions of the second brake platform (34).

9. A pulley-type separation gearbox according to claim 8, characterized in that: A fork seat (52) is fixedly mounted on the end of the fork plate (51) away from the coupling sleeve (2); a spring baffle (57) is fixedly mounted on the other end surface of the fork seat (52); the fork shaft (53) simultaneously passes through the spring baffle (57); a spring (55) is simultaneously sleeved at a middle position of the outer surface of the fork shaft (53); one end of the spring (55) is in contact with the spring baffle (57); and the other end of the spring (55) is in contact with an end surface of the shaft sleeve (54) close to the spring baffle (57).

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