High-precision planetary reducer input shaft structure

Abstract

The utility model relates to the technical field of shafts, in particular to a high-precision planetary reducer input shaft structure which comprises a shaft body and a transmission gear, and the shaft body is connected with the transmission gear through a connecting device.

Description

Technical Field

[0001] The utility model relates to the technical field of shafts, in particular to a high-precision planetary reducer input shaft structure. Background Art

[0002] The existing planetary reducers mainly include a ring gear housing, an input shaft, a sun gear connected to the input shaft, a planetary gear meshing with the sun gear, and an output shaft for installing the planetary gear. Currently, the input shaft and the sun gear are generally connected by interference fit or key. Interference fit is prone to slippage after long-term use, so key connections are more frequently used. However, the force points of the key connection are mainly concentrated on the connecting key. Once wear occurs, the coaxiality of the input shaft will immediately decrease. In severe cases, the input shaft and the sun gear may even be damaged and scrapped. Utility Model Content

[0003] Therefore, in view of the above problems, the utility model proposes a high-precision planetary reducer input shaft structure.

[0004] To achieve the above-mentioned purpose, the technical solution of the utility model is to provide a high-precision planetary reducer input shaft structure, including: a shaft body and a transmission gear, wherein the shaft body and the transmission gear are connected via a connecting device;

[0005] The connecting device comprises: a tapered sleeve arranged on the shaft body through a fixing device, and a tapered groove arranged on the transmission gear and matching with the tapered sleeve;

[0006] The fixing device comprises: a positioning shoulder arranged on the shaft body, a positioning sleeve arranged on the shaft body through a limiting device, at least one first keyway provided on the shaft body, a connecting key provided in the first keyway, and a second keyway provided on the cone sleeve for matching with the connecting key, and one end of the transmission gear resists against the positioning shoulder;

[0007] The limiting device comprises: an axial end baffle plate arranged at the end of the axial body, and at least two positioning screws locked on the axial end baffle plate and the axial body. One end of the positioning sleeve resists against the cone sleeve and the other end resists against the axial end baffle plate.

[0008] A further improvement is that a locking device for further enhancing the locking degree is provided between the cone sleeve and the cone groove.

[0009] A further improvement is that the engaging device comprises: at least one protruding block arranged on the cone sleeve, and grooves formed on the cone groove and resisting the left and right sides of the protruding block.

[0010] A further improvement is that a positioning device is provided between the positioning shaft shoulder and the tapered sleeve.

[0011] A further improvement is that the positioning device includes: a plurality of first positioning holes opened on the positioning shaft shoulder, a plurality of second positioning holes opened on the cone sleeve, and connecting blocks arranged in the first positioning holes and the second positioning holes.

[0012] The advantages and beneficial effects of the utility model are:

[0013] The coaxiality is high. A tapered sleeve is arranged on the shaft body through a positioning device and a connecting key, and the transmission gear is arranged on the tapered sleeve, which enhances the concentricity and coaxiality of the transmission gear. The positioning device can share the pressure on the connecting key, thereby extending the service life of the connecting key. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a cross-sectional schematic diagram of the input shaft structure of a high-precision planetary reducer of the utility model;

[0015] In the figure: 1. shaft body; 2. transmission gear; 3. taper sleeve; 4. taper groove; 5. positioning shoulder; 6. positioning sleeve; 7. first keyway; 8. connecting key; 9. second keyway; 10. shaft end baffle; 11. positioning screw; 12. protrusion; 13. groove; 14. first positioning hole; 15. second positioning hole; 16. connecting block. DETAILED DESCRIPTION

[0016] The following is a further description of the specific implementation of the present invention in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0017] like Figure 1 As shown, a high-precision planetary reducer input shaft structure includes: a shaft body 1 and a transmission gear 2, and is characterized in that: the shaft body 1 and the transmission gear 2 are connected through a connecting device.

[0018] In order to enhance the rotation coaxiality of the transmission gear 2 , the connection device includes: a tapered sleeve 3 arranged on the shaft body 1 through a fixing device, and a tapered groove 4 formed on the transmission gear 2 and matching with the tapered sleeve 3 .

[0019] In order to facilitate the fixation of the tapered sleeve 3, the fixing device includes: a positioning shoulder 5 arranged on the shaft body 1, a positioning sleeve 6 arranged on the shaft body 1 through a limiting device, at least one first keyway 7 opened on the shaft body 1, a connecting key 8 arranged in the first keyway 7, and a second keyway 9 penetrating through the tapered sleeve 3 for matching with the connecting key 8. One end of the transmission gear 2 resists against the positioning shoulder 5, and the smaller end of the tapered sleeve resists against the positioning shoulder.

[0020] In order to facilitate the limiting of the positioning sleeve 6, the limiting device includes: an axis end baffle 10 arranged at the end of the shaft body 1, and at least two positioning screws 11 locked on the axis end baffle 10 and the shaft body 1. One end of the positioning sleeve 6 resists against the cone sleeve 3 and the other end resists against the axis end baffle 10.

[0021] In order to enhance the rotational stability between the cone sleeve 3 and the transmission gear 2, a clamping device for further enhancing the clamping degree is further provided between the cone sleeve 3 and the cone groove 4, and the clamping device comprises: at least one protrusion 12 provided on the cone sleeve 3, and grooves 13 provided on the cone groove 4 and resisting the left and right sides of the protrusion 12.

[0022] In order to reduce the pressure on the connecting key 8, a positioning device is also provided between the positioning shoulder 5 and the tapered sleeve 3, and the positioning device includes: a plurality of first positioning holes 14 opened on the positioning shoulder 5, a plurality of second positioning holes 15 opened on the tapered sleeve 3, and a connecting block 16 arranged in the first positioning holes 14 and the second positioning holes 15.

[0023] Working principle: During assembly, first sleeve the transmission gear 2 on the tapered sleeve 3, then install the connecting block 16 and the connecting key 8 in the first positioning hole 14 and the first keyway 7, then align the second positioning hole 15 and the second keyway 9 to install the tapered sleeve 3 and the transmission gear 2, then sleeve the positioning sleeve 6, and position the positioning sleeve 6 through the shaft end baffle 10 to complete the assembly.

[0024] The basic principles, main features and advantages of the utility model are shown and described above. Those skilled in the art should understand that the utility model is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which shall fall within the scope of the utility model to be protected. The scope of protection of the utility model shall be defined by the attached claims and their equivalents.

Claims

1. A high-precision planetary reducer input shaft structure, comprising: A shaft body and a transmission gear, characterized in that: the shaft body and the transmission gear are connected by a connecting device; The connecting device comprises: a tapered sleeve arranged on the shaft body through a fixing device, and a tapered groove arranged on the transmission gear and matching with the tapered sleeve; The fixing device comprises: a positioning shoulder arranged on the shaft body, a positioning sleeve arranged on the shaft body through a limiting device, at least one first keyway provided on the shaft body, a connecting key provided in the first keyway, and a second keyway provided on the cone sleeve for matching with the connecting key, and one end of the transmission gear resists against the positioning shoulder; The limiting device comprises: an axial end baffle plate arranged at the end of the axial body, and at least two positioning screws locked on the axial end baffle plate and the axial body. One end of the positioning sleeve resists against the cone sleeve and the other end resists against the axial end baffle plate.

2. The high-precision planetary reducer input shaft structure according to claim 1, characterized in that: A clamping device for further enhancing the clamping degree is also provided between the cone sleeve and the cone groove.

3. The high-precision planetary reducer input shaft structure according to claim 2, characterized in that: The clamping device comprises: at least one protruding block arranged on the cone sleeve, and grooves arranged on the cone groove and resisting the left and right sides of the protruding block.

4. The high-precision planetary reducer input shaft structure according to claim 1, characterized in that: A positioning device is also arranged between the positioning shaft shoulder and the tapered sleeve.

5. The high-precision planetary reducer input shaft structure according to claim 4, characterized in that: The positioning device comprises: a plurality of first positioning holes formed on the positioning shaft shoulder, a plurality of second positioning holes formed on the cone sleeve, and a connecting block arranged in the first positioning holes and the second positioning holes.

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