Transmission shaft assembly capable of being assembled by rotating angle

Abstract

The utility model discloses a transmission shaft assembly capable of being assembled by rotating an angle, which relates to the field of agricultural machinery transmission shaft assemblies and comprises an input spline fork, an input connecting fork, an output connecting fork and an output spline fork, one end of the input connecting fork is connected with the input spline fork, and the other end of the input connecting fork is provided with an input shaft tube. The output shaft tube is arranged at one end of an output connecting fork in a matched connection mode, and the other end of the output connecting fork is connected with an output spline fork; positioning sliding grooves are symmetrically formed in the inner wall of the input shaft tube, positioning protrusions are symmetrically arranged on the outer wall of the output shaft tube, and when the input shaft tube is sleeved with the output shaft tube, the positioning protrusions are clamped into the corresponding positioning sliding grooves and rotate along the positioning sliding grooves, so that the input end internal spline is matched with the complete machine end external spline in phase, and meanwhile the complete machine end external spline is fixed. And the output end internal spline is matched with the tool end external spline in phase. The utility model solves the assembly problem when the phases of the external splines at the complete machine end and the tool end of the agricultural machinery transmission shaft are inconsistent.

Description

Technical Field

[0001] The utility model relates to the field of agricultural machinery transmission shaft assemblies, in particular to a transmission shaft assembly that can be assembled at a rotatable angle. Background Art

[0002] Currently, in conventional agricultural machinery drive shaft assemblies, the central shaft tubes are mated (using slot-type positioning) and can only extend and retract, not rotate. The splined fork at the input end of the drive shaft mates with the external spline at the machine end via internal splines, while the splined fork at the output end mates with the external spline at the tool end via internal splines. Because the spline grooves of the internal splines at both ends are oriented at 90 degrees, the phase is fixed. However, the machine end and the tool end are two separate pieces of equipment, and the phase of the external splines on the splined shafts on both sides may not be consistent. If this is not the case, the drive shaft cannot be assembled between the machine end and the tool end. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and to provide a transmission shaft assembly that can be assembled at a rotatable angle, thereby solving the assembly problem when the external splines of the whole end and the tool end of the agricultural machinery transmission shaft are out of phase with each other.

[0004] The purpose of the present utility model is achieved through the following technical solutions: this transmission shaft assembly that can be assembled at a rotatable angle includes an input spline fork, an input connecting fork, an output connecting fork and an output spline fork, one end of the input connecting fork is connected to the input spline fork through a universal joint, and an input end internal spline is provided on the input spline fork for connecting the whole machine end external spline of the spline shaft, the other end of the input connecting fork is provided with an input shaft tube for matching the output shaft tube provided at one end of the output connecting fork, the other end of the output connecting fork is connected to the output spline fork through a universal joint, and an output end internal spline is provided on the output spline fork for connecting the tool end external spline of the spline shaft of the tool end; positioning grooves are symmetrically provided on the inner wall of the input shaft tube, and positioning protrusions are symmetrically provided on the outer wall of the output shaft tube, and when the output shaft tube is inserted into the input shaft tube, the positioning protrusions are stuck in the corresponding positioning grooves and rotate along the positioning grooves so that the input end internal spline is phase-matched with the whole machine end external spline, and the output end internal spline is phase-matched with the tool end external spline.

[0005] As a further technical solution, the maximum rotation angle of the positioning protrusion relative to the positioning slot is β, and β≤60°.

[0006] As a further technical solution, before assembly, the phase angle between the external spline on the machine end and the external spline on the tool end is θ, and θ≤β.

[0007] As a further technical solution, the number of teeth Z of the external spline on the machine end and the external spline on the tool end is ≥6, and the angle between adjacent spline teeth is α≤β.

[0008] As a further technical solution, the maximum rotation angle of the internal spline of the output end is γ, and γ=β.

[0009] The beneficial effects of the utility model are:

[0010] 1. The rotating structure (positioning protrusion and positioning groove) is designed on the shaft tube. By rotating the shaft tube, the phase angle of the internal splines at both ends can be changed to meet the assembly requirements when the phases of the whole machine and the tool end are inconsistent.

[0011] 2. Applicable to spline shafts with spline tooth angle α≤60° and spline tooth number Z≥6. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural diagram of the utility model during assembly.

[0013] Figure 2 It is a schematic cross-sectional structural diagram of the input shaft tube in the present utility model.

[0014] Figure 3 This is a schematic diagram of the structure after the input shaft tube and the output shaft tube are assembled in the utility model ( Figure 1 CC cross-sectional view).

[0015] Figure 4 This is a schematic diagram of the structure in which the input shaft tube rotates relative to the output shaft tube in the present invention.

[0016] Figure 5 for Figure 1 BB cross-sectional view.

[0017] Figure 6 for Figure 1 DD cross-sectional view.

[0018] Figure 7 This is a schematic diagram of the structure after the spline inside the output end rotates.

[0019] Figure 8 for Figure 1 AA cross-sectional view.

[0020] Figure 9 for Figure 1 EE cross-sectional view.

[0021] Figure 10 This is a structural sectional view of the machine-end spline shaft or the tool-end spline shaft in the present invention.

[0022] Explanation of the accompanying symbols: input spline fork 1, input connecting fork 2, input shaft tube 3, output shaft tube 4, output connecting fork 5, output spline fork 6, universal joint 7, input end internal spline 8, output end internal spline 9, whole machine end spline shaft 10, whole machine end external spline 11, tool end spline shaft 12, tool end external spline 13, positioning protrusion 14, positioning groove 15. DETAILED DESCRIPTION

[0023] The following is a detailed introduction to the present invention with reference to the accompanying drawings:

[0024] Example: As shown in the attached Figures 1 to 10 As shown, this rotatable angle assembled transmission shaft assembly includes an input spline fork 1, an input connecting fork 2, an input shaft tube 3, an output shaft tube 4, an output connecting fork 5, an output spline fork 6, a universal joint 7, an input end internal spline 8, an output end internal spline 9, a whole machine end spline shaft 10, a whole machine end external spline 11, a tool end spline shaft 12, a tool end external spline 13, a positioning protrusion 14 and a positioning groove 15.

[0025] Reference Attachment Figure 1 The left end of the input connecting fork 2 is connected to the input spline fork 1 via a universal joint 7. The input spline fork 1 is provided with an input-end internal spline 8, which can connect to the machine-end external spline 11 on the machine-end spline shaft 10. An input shaft tube 3 is provided at the right end of the input connecting fork 2. This input shaft tube 3 can be matched with the output shaft tube 4, and the two are connected via a plug-in socket. The output shaft tube 4 is provided at the left end of the output connecting fork 5. The right end of the output connecting fork 5 is connected to the output spline fork 6 via a universal joint 7. The output spline fork 6 is provided with an output-end internal spline 9, which can connect to the tool-end external spline 13 on the tool-end spline shaft 12.

[0026] like Figure 2 、 3 As shown in Figure 4, a group of positioning grooves 15 are symmetrically opened on the inner wall of the input shaft tube 3, and a group of positioning protrusions 14 are symmetrically opened on the outer wall of the output shaft tube 4. When the output shaft tube 4 is inserted into the input shaft tube 3, the positioning protrusions 14 are inserted into the corresponding positioning grooves 15 and rotate along the positioning grooves 15. Preferably, the maximum rotation angle of the positioning protrusions 14 relative to the positioning grooves 15 is β (that is, the angle between the two extreme rotation positions), and β≤60°.

[0027] Reference Attachment Figure 8 、 9 Before assembly, the phase angle between the machine end external spline 11 and the tool end external spline 13 is θ, and θ≤β. Gradually rotate the output shaft tube 4 according to the phase angle θ, as shown in FIG. Figure 7As shown, the output spline fork 6 also starts to rotate, so that the input end internal spline 8 matches the machine end external spline 11, while the output end internal spline 9 matches the tool end external spline 13. Preferably, the maximum rotation angle of the output end internal spline 9 is γ, and γ=β.

[0028] In this embodiment, the number of spline teeth is 6 and the included angle of the spline teeth is 60°.

[0029] like Figure 10 As shown, the same applies when the number of teeth Z of the machine end external spline 11 and the tool end external spline 13 is greater than 6, and the angle α between adjacent spline teeth is less than 60°.

[0030] The working process of this utility model:

[0031] After the output shaft tube 4 is fitted into the input shaft tube 3, the output shaft tube 4 can rotate within the range of 0 to 60 degrees. By rotating the output shaft tube 4, the internal spline 9 at the output end can be synchronously rotated within the range of 0 to 60 degrees. When the phases of the machine-end spline shaft 10 and the tool-end spline shaft 12 are inconsistent and there is a phase angle θ (the spline is an equally divided 6-tooth spline, and the angle between the two spline teeth is 60 degrees, so θ < 60 degrees), when assembling the drive shaft, first assemble the drive shaft input spline fork 1 onto the machine-end spline shaft 10. By rotating the output shaft tube 4, the internal spline 9 at the output end of the output spline fork 6 is synchronously driven to rotate by an angle of θ, so that it can mate with the tool-end spline shaft 12 to complete the assembly of the drive shaft.

[0032] It is understandable that for those skilled in the art, any equivalent replacement or change of the technical solution and the concept of the utility model should fall within the scope of protection of the claims attached to the utility model.

Claims

1. A transmission shaft assembly capable of being assembled at a rotatable angle, characterized in that: The invention comprises an input spline fork (1), an input connecting fork (2), an output connecting fork (5) and an output spline fork (6); one end of the input connecting fork (2) is connected to the input spline fork (1) via a universal joint (7); an input end inner spline (8) is provided on the input spline fork (1) for connecting to an integral end outer spline (11) of an integral end spline shaft (10); an input shaft tube (3) is provided at the other end of the input connecting fork (2) for matching connection with an output shaft tube (4) provided at one end of the output connecting fork (5); the other end of the output connecting fork (5) is connected to the output spline fork (6) via a universal joint (7); and the output spline fork (6) is connected to the integral end outer spline shaft (10) of the integral end spline shaft (10). An output end inner spline (9) is provided on the key fork (6) for connecting to a tool end outer spline (13) of a tool end spline shaft (12); a positioning groove (15) is symmetrically provided on the inner wall of the input shaft tube (3); a positioning protrusion (14) is symmetrically provided on the outer wall of the output shaft tube (4); and when the output shaft tube (4) is inserted into the input shaft tube (3), the positioning protrusion (14) is inserted into the corresponding positioning groove (15) and rotates along the positioning groove (15), so that the input end inner spline (8) and the machine end outer spline (11) are matched in phase, and the output end inner spline (9) and the tool end outer spline (13) are matched in phase.

2. The rotatable transmission shaft assembly according to claim 1, characterized in that: The maximum rotation angle of the positioning protrusion (14) relative to the positioning slot (15) is β, and β≤60°.

3. The rotatable transmission shaft assembly according to claim 2, characterized in that: Before assembly, the phase angle between the machine end external spline (11) and the tool end external spline (13) is θ, and θ≤β.

4. The rotatable transmission shaft assembly according to claim 2, characterized in that: The number of teeth Z of the machine end external spline (11) and the tool end external spline (13) is ≥6, and the angle between adjacent spline teeth is α≤β.

5. The rotatable transmission shaft assembly according to claim 2, characterized in that: The maximum rotation angle of the output end internal spline (9) is γ, and γ=β.

Images