PTO rotating speed mode switching device based on meshing sleeve

Abstract

The utility model discloses a PTO rotating speed mode switching device based on a meshing sleeve. The PTO rotating speed mode switching device comprises a PTO engine rotating speed input shaft. The PTO walking system is a walking system synchronous rotating speed input shaft; a meshing sleeve; positioning the steel ball; the PTO final input shaft is a PTO final input shaft; a limiting clamp spring; a shift spring; a small needle bearing; a thrust cylindrical roller bearing; the engine rotating speed meshing gear is an engine rotating speed meshing gear; and a large needle bearing. By moving the meshing sleeve, different rotating speed modes of the PTO final input shaft and the PTO engine rotating speed input shaft and different rotating speed modes of the PTO final input shaft and the PTO walking system synchronous rotating speed input shaft are selected according to actual working requirements, so that the walking speed and the PTO rotating speed of the tractor in different working intensity load operations such as rotary tillage and pesticide spraying are synchronized, the working quality of the tractor is improved, and the working efficiency of the tractor is improved. The utility model has the advantages of compact structure, simple and reliable operation, stable work and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of agricultural tractors, and in particular relates to a PTO speed mode switching device based on an engagement sleeve. Background Art

[0002] The key machinery in agricultural production is the tractor. As a general-purpose power machinery for agricultural production, the tractor plays an important role in tillage, planting, intertillage management, harvesting and other links in the agricultural production process. Among them, PTO power output is an important way for tractors to participate in agricultural production management and provide power for hanging implements. However, the existing PTO can only provide 2-4 fixed speeds, and the number of power input modes for hanging implements is small. It is impossible to synchronize the PTO speed according to the tractor's travel speed, resulting in poor matching between the tractor load operation and the PTO speed, and the operation quality cannot be guaranteed. At present, in agricultural production practice, agricultural tractors do not have the function of switching between the PTO synchronous speed and the fixed speed mode, and it is impossible to achieve the synchronous switching of the PTO speed and the tractor travel speed. It is urgent to develop a PTO speed mode switching device based on a meshing sleeve suitable for agricultural production to solve the problem of synchronizing the walking speed of the tractor with the PTO speed when performing different work intensity load operations such as rotary tillage and spraying, and improve the operation quality and efficiency of the tractor. Utility Model Content

[0003] The technical problem to be solved by the utility model is that, in view of the prior art, a PTO speed mode switching device based on a meshing sleeve is proposed. By moving the 3-meshing sleeve, different speed modes of the 5-PTO final input shaft, the 1-PTO engine speed input shaft, and the 2-PTO travel system synchronous speed input shaft are selected according to actual work needs, so as to achieve synchronization of the travel speed of the tractor with the PTO speed when performing operations of different work intensities such as rotary tillage and spraying.

[0004] To achieve the above purpose, the technical solution of the utility model is:

[0005] A PTO speed mode switching device based on a meshing sleeve, comprising 1-PTO engine speed input shaft; 2-PTO travel system synchronous speed input shaft; 3-meshing sleeve; 4-positioning steel ball; 5-PTO final input shaft; 6-limiting retaining spring; 7-shift spring; 8-small needle roller bearing; 9-thrust cylindrical roller bearing; 10-engine speed meshing gear; 11-large needle roller bearing, wherein 1 is the PTO engine speed input shaft, one end of which is spline-connected to the engine, and the other end of which is spline-connected to 10-engine speed meshing gear; 2 is the PTO travel system synchronous speed input shaft, and the middle spline is installed with the travel system gear, which is the travel system The last stage of transmission of the system gearbox, the outer spline can be connected to the 3-meshing sleeve; the 3 is the meshing sleeve, one end of which is spline-connected with the 5-PTO final input shaft, and the 3-meshing sleeve is driven to move by the control fork, and the other end of the 3-meshing sleeve is spline-connected with the 2-PTO travel system synchronous speed input shaft to achieve the synchronous speed input of the forward speed of the synchronous tractor; the 5 is the PTO final input shaft, which is coaxially matched with the 1-PTO engine speed input shaft through the 8-small needle bearing; the 10 is the engine speed meshing gear, the inner spline is meshed with the spline of the 1-PTO engine speed input shaft, and the outer spline can be meshed with the 3-meshing sleeve to achieve fixed speed shifting.

[0006] Preferably, the 1-PTO engine speed input shaft and the 2-PTO travel system synchronous speed input shaft are nestedly connected via 11-large needle bearings.

[0007] Preferably, the 2-PTO travel system synchronous speed input shaft is the last stage transmission shaft of the travel system gearbox. When the gear of the travel system is switched, the speed of the 2-PTO travel system synchronous speed input shaft is switched synchronously with the speed of the crawler drive shaft.

[0008] Preferably, the internal spline connecting the 3-engaging sleeve and the 5-PTO final input shaft is divided into 4 sections in the axial direction, with grooves between the sections. When shifting gears, the 7-shift spring presses the 4-positioning steel ball against the grooves between the sections of the 3-engaging sleeve to achieve locking after shifting gears, and the 6-limiting retaining spring limits the axial position of the 3-engaging sleeve.

[0009] Preferably, the 9-thrust cylindrical roller bearing has an interference fit with the 5-PTO final input shaft and a clearance fit with the 1-PTO engine speed input shaft. The 9-thrust cylindrical roller bearing axially positions the 10-engine speed meshing gear on the 1-PTO engine speed input shaft and simultaneously axially positions the 8-small needle bearing.

[0010] The utility model is based on the above design, and its working principle is:

[0011] When shifting, the shift fork drives the 3-engagement sleeve to the left to mesh with the 2-travel system synchronous speed input shaft, shifting to the synchronous speed mode of the tractor forward speed, and to the right to mesh with the 10-engine speed meshing gear, shifting to the fixed speed mode. The specific transmission route is:

[0012] PTO output engine speed: 1-PTO engine speed input shaft-10-engine speed meshing gear-3-meshing sleeve-5-PTO final input shaft;

[0013] PTO outputs the synchronous speed of the walking system: 2-the synchronous speed input shaft of the walking system-3-the meshing sleeve-5-the final input shaft of PTO.

[0014] The beneficial effects of the utility model are mainly manifested in:

[0015] The utility model provides a PTO speed mode switching device based on a meshing sleeve. By moving the 3-meshing sleeve, different speed modes of the 5-PTO final input shaft, the 1-PTO engine speed input shaft, and the 2-PTO travel system synchronous speed input shaft are selected according to actual work needs, so as to synchronize the travel speed of the tractor with the PTO speed when performing load operations of different intensities such as rotary tillage and spraying, thereby improving the operation quality of the tractor. The utility model has the advantages of compact structure, simple and reliable operation, stable operation, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Attached Figure 1 It is a transmission system diagram of a PTO speed mode switching device based on a meshing sleeve of the utility model;

[0017] Attached Figure 2 It is a structural schematic diagram of a PTO speed mode switching device based on a meshing sleeve of the utility model;

[0018] Attached Figure 3 It is a structural schematic diagram of a 10-spline connector of a PTO speed mode switching device based on a meshing sleeve of the utility model;

[0019] Attached Figure 4 It is a front view of a 3-engagement sleeve of a PTO speed mode switching device based on an engagement sleeve of the utility model;

[0020] Attached Figure 5 A top view of a 3-engagement sleeve of a PTO speed mode switching device based on an engagement sleeve according to the utility model;

[0021] Attached Figure 6 It is a schematic structural diagram of a 3-engagement sleeve of a PTO speed mode switching device based on an engagement sleeve of the utility model;

[0022] Attached Figure 7 The structure diagram of a 9-thrust cylindrical roller bearing of a PTO speed mode switching device based on a meshing sleeve of the utility model Figure 1 ;

[0023] Attached Figure 8 The structure diagram of a 9-thrust cylindrical roller bearing of a PTO speed mode switching device based on a meshing sleeve of the utility model Figure 2 ;

[0024] Among them, 1-PTO engine speed input shaft; 2-PTO travel system synchronous speed input shaft; 3-engagement sleeve; 4-positioning steel ball; 5-PTO final input shaft; 6-limit retaining spring; 7-shift spring; 8-small needle roller bearing; 9-thrust cylindrical roller bearing; 10-engine speed meshing gear; 11-large needle roller bearing. DETAILED DESCRIPTION

[0025] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0026] Reference Figures 1 to 8 , a PTO speed mode switching device based on a meshing sleeve, including 1-PTO engine speed input shaft; 2-PTO travel system synchronous speed input shaft; 3-meshing sleeve; 4-positioning steel ball; 5-PTO final input shaft; 6-limiting retaining spring; 7-shift spring; 8-small needle roller bearing; 9-thrust cylindrical roller bearing; 10-engine speed meshing gear; 11-large needle roller bearing, 1 is the PTO engine speed input shaft, one end of which is spline-connected to the engine, and the other end is spline-connected to 10-engine speed meshing gear; 2 is the PTO travel system synchronous speed input shaft, and the middle spline is installed with the travel system gear, which is the travel system. The last stage of transmission of the system gearbox, the outer spline end can be connected to the 3-meshing sleeve; the 3 is the meshing sleeve, one end of which is spline-connected with the 5-PTO final input shaft, and the 3-meshing sleeve is driven to move by the control fork, and the other end of the 3-meshing sleeve is spline-connected with the 2-travel system power input shaft to achieve synchronous speed input of the forward speed of the synchronous tractor; the 5 is the PTO final input shaft, which is coaxially matched with the 1-PTO engine speed input shaft through the 8-small needle bearing; the 10 is the engine speed meshing gear, the inner spline is meshed with the spline of the 1-PTO engine speed input shaft, and the outer spline can be meshed with the 3-meshing sleeve to achieve fixed speed shifting.

[0027] Preferably, the 1-PTO engine speed input shaft and the 2-PTO travel system synchronous speed input shaft are nestedly connected via 11-large needle bearings.

[0028] Preferably, the 2-PTO travel system synchronous speed input shaft is the last stage transmission shaft of the travel system gearbox. When the gear of the travel system is switched, the speed of the 2-PTO travel system synchronous speed input shaft is switched synchronously with the speed of the crawler drive shaft.

[0029] Preferably, the internal spline connecting the 3-engaging sleeve and the 5-PTO final input shaft is divided into 4 sections in the axial direction, with grooves between the sections. When shifting gears, the 7-shift spring presses the 4-positioning steel ball against the grooves between the sections of the 3-engaging sleeve to achieve locking after shifting gears, and the 6-limiting retaining spring limits the axial position of the 3-engaging sleeve.

[0030] Preferably, the 9-thrust cylindrical roller bearing has an interference fit with the 5-PTO final input shaft and a clearance fit with the 1-PTO engine speed input shaft. The 9-thrust cylindrical roller bearing axially positions the 10-engine speed meshing gear on the 1-PTO engine speed input shaft and simultaneously axially positions the 8-small needle bearing.

[0031] The utility model is based on the above design, and its working principle is:

[0032] When shifting, the shift fork drives the 3-engagement sleeve to the left to mesh with the 2-travel system power input shaft, shifting to the synchronous speed mode of the tractor forward speed, and to the right to mesh with the 10-engine speed meshing gear, shifting to the fixed speed mode. The specific transmission route is:

[0033] PTO output engine speed: 1-PTO engine speed input shaft-10-engine speed meshing gear-3-meshing sleeve-5-PTO final input shaft;

[0034] PTO outputs the synchronous speed of the walking system: 2-the synchronous speed input shaft of the walking system-3-the meshing sleeve-5-the final input shaft of PTO.

[0035] The above description of the utility model is illustrative rather than restrictive. Those skilled in the art understand that many modifications, changes or equivalents may be made within the spirit and scope defined in the claims, but they will all fall within the scope of protection of the utility model.

Claims

1. A PTO speed mode switching device based on a meshing sleeve, comprising a PTO engine speed input shaft (1); a PTO travel system synchronous speed input shaft (2); a meshing sleeve (3); a positioning steel ball (4); a PTO final input shaft (5); a limit spring (6); a shift spring (7); a small needle roller bearing (8); a thrust cylindrical roller bearing (9); an engine speed meshing gear (10); and a large needle roller bearing (11), characterized in that: The PTO engine speed input shaft (1) has one end connected to the engine spline and the other end connected to the engine speed meshing gear (10) by spline. The PTO travel system synchronous speed input shaft (2) has a middle spline mounted on the travel system gear and is the last stage of the travel system gearbox transmission, and the outer spline end can be connected to the meshing sleeve (3). The meshing sleeve (3) has one end connected to the PTO final input shaft (5) by spline, and the meshing sleeve (3) is driven to move by the control fork, and the other end of the meshing sleeve (3) is connected to the PTO travel system synchronous speed input shaft (2) by spline, so as to achieve synchronous speed input of the forward speed of the synchronous tractor. The PTO final input shaft (5) is coaxially matched with the PTO engine speed input shaft (1) through a small needle bearing (8). The engine speed meshing gear (10) has an inner spline meshed with the spline of the PTO engine speed input shaft (1), and an outer spline meshed with the meshing sleeve (3), so as to achieve fixed speed shifting.

2. The PTO speed mode switching device based on the engagement sleeve according to claim 1 is characterized in that: The PTO engine speed input shaft (1) and the PTO travel system synchronous speed input shaft (2) are connected in a nested manner via a large needle roller bearing (11).

3. The PTO speed mode switching device based on the engagement sleeve according to claim 2 is characterized in that: The PTO travel system synchronous speed input shaft (2) is the last stage transmission shaft of the travel system gearbox. When the gear position of the travel system is switched, the speed of the PTO travel system synchronous speed input shaft (2) is switched synchronously with the speed of the crawler drive shaft.

4. The PTO speed mode switching device based on the engagement sleeve according to claim 3 is characterized in that: The internal spline connecting the engagement sleeve (3) and the final input shaft (5) of the PTO is divided into four sections in the axial direction, and grooves are provided between the sections. When shifting gears, the shift spring (7) presses the positioning steel ball (4) against the grooves between the sections of the engagement sleeve (3) to achieve locking after shifting gears. The limiting retaining spring (6) limits the engagement sleeve (3) in the axial direction.

5. The PTO speed mode switching device based on the engagement sleeve according to claim 4 is characterized in that: The thrust cylindrical roller bearing (9) is interference fit with the PTO final input shaft (5) and clearance fit with the PTO engine speed input shaft (1). The thrust cylindrical roller bearing (9) axially locates the engine speed meshing gear (10) on the PTO engine speed input shaft (1) and simultaneously axially locates the small needle roller bearing (8).

Images