Planet carrier and sun gear transmission connection structure

Abstract

The utility model relates to the technical field of planetary reducers, in particular to a transmission connection structure of a planet carrier and a sun gear, which comprises a primary planet carrier and a secondary sun gear in transmission connection with the primary planet carrier, the secondary sun gear comprises a gear section and a spline shaft which are coaxially connected, and the spline shaft is coaxially meshed with the primary planet carrier; the outer diameter of the spline shaft is smaller than that of the gear section; the spline shaft is further sleeved with a transmission seat, the transmission seat is meshed with the spline shaft, and the transmission seat is in transmission connection with the first-stage planet carrier. The transmission seat is positioned between the primary planet carrier and the gear section; the gear section is sleeved with a clamping spring, and the two ends of the clamping spring abut against the transmission base and the gear section respectively. First end face teeth are integrally arranged on the side, close to the first-stage planet carrier, of the transmission base, second end face teeth are integrally arranged at the end, close to the transmission base, of the first-stage planet carrier, and the first end face teeth are meshed with the second end face teeth. The problems that a traditional low-level planet carrier and an adjacent high-level sun gear are troublesome to assemble and disassemble and low in efficiency, and spline teeth in transmission connection between the traditional low-level planet carrier and the adjacent high-level sun gear are not high in transmission strength are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to planetary reducer technical field, specifically, a kind of planetary carrier and sun gear transmission connection structure. BACKGROUND

[0002] The traditional reducer assembly system primary planetary carrier is set in secondary sun gear section and is locked as a whole by snap spring, and when connecting the primary planetary carrier and secondary sun gear transmission, secondary sun gear needs to be installed first, then the primary planetary carrier is connected with secondary sun gear and snap spring is prevented from falling off from the end of sun gear, and then a plurality of primary planetary gears on the primary planetary carrier can be installed.

[0003] Secondary sun gear is generally matched with corresponding three or four secondary planetary gears, and relative wear is faster. At the same time, secondary sun gear is connected with primary planetary carrier through spline, and spline tooth is damaged due to limited transmission connection strength and overloading. Secondary sun gear cannot be directly disassembled with primary planetary carrier, and the axial gap between secondary sun gear and planetary carrier is small, so that snap spring can be removed after a plurality of primary planetary gears on primary planetary carrier are removed, and then secondary sun gear is separated from primary planetary carrier, which leads to very troublesome overall installation and disassembly, especially the overall replacement after secondary sun gear is toothed, which leads to extremely low overall installation and disassembly efficiency. SUMMARY

[0004] The utility model aims at providing a kind of planetary carrier and sun gear transmission connection structure, which solves the problems of traditional low-level planetary carrier and adjacent high-level sun gear, such as troublesome installation and disassembly, low efficiency and low spline tooth transmission strength of transmission connection between the two.

[0005] The utility model realizes the following technical scheme: a kind of planetary carrier and sun gear transmission connection structure, including primary planetary carrier and secondary sun gear transmission connected with it, the secondary sun gear includes gear segment and spline shaft connected coaxially, the spline shaft is coaxially engaged with the primary planetary carrier;The outer diameter of the spline shaft is less than the outer diameter of the gear segment;

[0006] Transmission seat is further sleeved on the spline shaft, the transmission seat is engaged with the spline shaft, and the transmission seat is transmission connected with the primary planetary carrier.

[0007] Further, the transmission seat is located between the primary planetary carrier and the gear segment.

[0008] Further, snap spring is sleeved on the gear segment, and the two ends of the snap spring are respectively abutted with the transmission seat and gear segment.

[0009] Further, the transmission seat is integrally provided with first end face teeth on one side close to the primary planetary carrier, and the primary planetary carrier is integrally provided with second end face teeth on one end close to the transmission seat, and the first end face teeth are engaged with the second end face teeth.

[0010] Further, a plurality of driving holes are arranged in an annular array on the transmission seat, the driving holes are parallel to the axis of the transmission seat, and a transmission pin is arranged in the driving hole;

[0011] The primary planetary carrier is provided with a plurality of transmission holes in an annular array, and one end of the transmission pin extends out of the driving hole and is arranged in the transmission hole.

[0012] Further, a plurality of pin holes are arranged in a radial direction on the transmission seat, and the pin holes are communicated with the driving holes;

[0013] The transmission pin is provided with a lock hole in a radial direction, and a spring pin is arranged in the pin hole and the lock hole.

[0014] Further, a positioning groove is arranged on the inner wall of the side of the driving hole away from the primary planetary carrier;

[0015] The transmission pin is provided with a positioning block on the side wall away from the primary planetary carrier, and when the positioning block is embedded in the positioning groove, the pin hole and the lock hole are coaxially communicated.

[0016] The technical scheme of the utility model has at least the following advantages and beneficial effects:

[0017] 1. The transmission seat can not only limit the primary planetary carrier, but also assist in transmitting torque, so that the torque between the secondary sun gear and the primary planetary carrier is not only transmitted through the spline shaft, but also transmitted through the transmission seat, which facilitates simultaneous mounting and dismounting, enhances the strength of the overall transmission, and helps to prolong the service life.

[0018] 2. When dismounting, the primary planetary carrier can be directly pulled out of the spline shaft, and the mounting and dismounting of the primary planetary carrier and the secondary sun gear are simple and fast, and the mounting and dismounting of the primary planetary carrier and the secondary sun gear can be completed without dismounting the primary planetary gear on the primary planetary carrier, which greatly improves the work efficiency and improves the torque transmission capacity between the two. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the utility model, and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0020] Figure 1 This is a schematic cross-sectional view of a transmission connection structure between a planet carrier and a sun gear provided by the present invention;

[0021] Figure 2 for Figure 1 A magnified schematic diagram of the structure at A in the middle;

[0022] Icons: 1. First-stage planetary carrier, 11. Second end face tooth, 12. Transmission hole, 2. Secondary sun gear, 21. Gear segment, 22. Spline shaft, 3. Transmission seat, 31. First end face tooth, 32. Drive hole, 33. Pin hole, 34. Positioning slot, 4. Circlip, 5. Transmission pin, 51. Lock hole, 52. Positioning block, 6. Spring pin. DETAILED DESCRIPTION

[0023] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0025] Reference Figures 1 to 2 As shown, this embodiment provides a planetary carrier and sun gear transmission connection structure, including a primary planetary carrier 1 and a secondary sun gear 2 transmission-connected thereto, the secondary sun gear including a coaxially connected gear segment 21 and a spline shaft 22, the gear segment 21 meshes with several planetary gears on the secondary planetary carrier, and the spline shaft 22 coaxially meshes with the primary planetary carrier 1 for transmitting torque.

[0026] More specifically, Figure 1As shown, the outer diameter of the spline shaft 22 is smaller than the outer diameter of the gear section 21, which can limit the primary planetary carrier 1; the spline shaft 22 is further sleeved with a transmission seat 3, the transmission seat 3 is engaged with the spline shaft 22, the transmission seat 3 is in transmission connection with the primary planetary carrier 1, the transmission seat 3 is located between the primary planetary carrier 1 and the gear section 21, and then during installation, the secondary sun gear 2 and the secondary planetary carrier can be installed in place first, and then after the transmission seat 3 is installed, the primary planetary carrier 1 can be installed on the spline shaft 22 of the secondary sun gear 2, the transmission seat 3 can not only limit the primary planetary carrier 1, but also assist in transmitting torque, so that the secondary sun gear 2 and the primary planetary carrier 1 not only transmit torque through the spline shaft 22, but also transmit torque through the transmission seat 3, which is convenient for installation and removal, enhances the strength of the overall transmission, and helps to prolong the service life.

[0027] More specifically, as shown in Figure 1 and Figure 2 , the gear section 21 is sleeved with a circlip 4, the two ends of the circlip 4 are respectively abutted with the transmission seat 3 and the gear section 21, and in specific implementation, the end of the gear section 21 is provided with a connecting portion with the circlip 4, the circlip 4 is connected with the connecting portion, and the connecting portion and the circlip 4 are abutted with the transmission seat 3, which is used to limit the transmission seat 3, and at the same time, according to the replacement of different sizes of the circlip 4, the transmission seat 3 and the primary planetary carrier 1 can be stably and closely contacted and transmit torque.

[0028] More specifically, as shown in Figure 1 and Figure 2 , the transmission seat 3 is integrally provided with a first end face tooth 31 on the side close to the primary planetary carrier 1, and the primary planetary carrier 1 is integrally provided with a second end face tooth 11 on the end close to the transmission seat 3, the first end face tooth 31 is engaged with the second end face tooth 11, and then after the transmission seat 3 and the primary planetary carrier 1 are stably and closely abutted, the first end face tooth 31 is engaged with the second end face tooth 11, which is used to stably transmit torque, and then enhances the transmission strength of torque between the secondary sun gear 2 and the primary planetary carrier 1.

[0029] More specifically, as shown in Figure 1 and Figure 2 , the transmission seat 3 is annularly arranged with a plurality of driving holes 32, the plurality of driving holes 32 are parallel to the axis of the transmission seat 3, and a transmission pin 5 is arranged in the driving hole 32; the primary planetary carrier 1 is annularly arranged with a plurality of transmission holes 12, and one end of the transmission pin 5 extends out of the driving hole 32 and is arranged in one transmission hole 12. In addition to the first end face tooth 31 and the second end face tooth 11 being engaged with each other to transmit torque between the secondary sun gear 2 and the primary planetary carrier 1, the transmission pin 5 can also transmit torque between the two, which can enhance the structural strength of the overall torque transmission, and at the same time, it is convenient for the installation of the primary planetary carrier 1 and the secondary sun gear 2.

[0030] As shown in Figure 1 andFigure 2 As shown in the drawings, a plurality of pin holes 33 are provided on the transmission seat 3 in the radial direction, and the pin holes 33 are communicated with the driving holes 32; a plurality of locking holes 51 are provided on the transmission pin 5 in the radial direction, and the pin holes 33 and the locking holes 51 are provided with spring pins 6. A positioning groove 34 is provided on the inner wall of the driving hole 32 away from the primary planetary carrier 1; a positioning block 52 is provided on the side wall of the transmission pin 5 away from the primary planetary carrier 1, and when the positioning block 52 is embedded in the positioning groove 34, the pin holes 33 and the locking holes 51 are coaxially communicated.

[0031] In specific implementation, as shown in the drawings, Figure 1 and Figure 2 Figure 1 Figure 2 when installed, first, the gear segment 21 of the secondary sun gear 2 is engaged with a plurality of secondary planetary gears of the secondary planetary carrier, at this time, the secondary sun gear 2 is coaxially installed in place, then the snap spring 4 is installed on the gear segment 21, the driving pins are respectively inserted into the driving holes 32, the positioning block 52 is embedded in the positioning groove 34, at the same time, the pin holes 33 and the locking holes 51 are coaxial, then the spring pins 6 are inserted into the pin holes 33 and the locking holes 51, so that the transmission pin 5 is fixed with the transmission seat 3, the transmission pin 5 cannot move in the driving hole 32, then the transmission seat 3 is sleeved on the spline shaft 22, the inner cavity of the transmission seat 3 is provided with a spline cavity, after the spline cavity is embedded in the spline shaft 22, the spline shaft 22 can drive the transmission seat 3 to rotate, finally, the primary planetary carrier 1 is directly adjusted to the right position and is sleeved on the spline shaft 22, at the same time, a plurality of transmission pins 5 are respectively inserted into a plurality of transmission holes 12, finally, the first end surface tooth 31 is engaged with the second end surface tooth 11, conversely, when disassembled, the primary planetary carrier 1 can be directly pulled out, the whole assembly and disassembly is simple and fast, the primary planetary carrier 1 and the secondary sun gear 2 can be assembled and disassembled without removing the primary planetary gears on the primary planetary carrier 1, the work efficiency is greatly improved, and the torque transmission capacity between the two is improved.

[0032] The preferred embodiments of the utility model are only used for limiting the utility model, for the person skilled in the art, the utility model can have various changes and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A planetary carrier and sun gear transmission connection structure, comprising a primary planetary carrier (1) and a secondary sun gear (2) in transmission connection therewith, characterized in that: The secondary sun gear (2) comprises a gear segment (21) and a spline shaft (22) connected coaxially, the spline shaft (22) is engaged coaxially with the primary planetary carrier (1); the outer diameter of the spline shaft (22) is smaller than that of the gear segment (21); The spline shaft (22) is further sleeved with a transmission seat (3), the transmission seat (3) is engaged with the spline shaft (22), and the transmission seat (3) is in transmission connection with the primary planetary carrier (1).

2. The planetary carrier and sun gear transmission connection structure of claim 1, wherein, The transmission seat (3) is located between the primary planetary carrier (1) and the gear segment (21).

3. The planetary carrier and sun gear transmission connection structure of claim 2, wherein, The gear segment (21) is sleeved with a clamping spring (4), and the two ends of the clamping spring (4) are respectively abutted with the transmission seat (3) and the gear segment (21).

4. The planetary carrier and sun gear transmission connection structure according to claim 2 or 3, characterized in that The transmission seat (3) is integrally provided with a first end face tooth (31) on the side close to the primary planetary carrier (1), the primary planetary carrier (1) is integrally provided with a second end face tooth (11) on the end close to the transmission seat (3), and the first end face tooth (31) is engaged with the second end face tooth (11).

5. The planetary carrier and sun gear transmission connection structure of claim 4, wherein, A plurality of driving holes (32) are arranged in an annular array on the transmission seat (3), the driving holes (32) are parallel to the axis of the transmission seat (3), and a transmission pin (5) is arranged in the driving hole (32); A plurality of transmission holes (12) are arranged in an annular array on the primary planetary carrier (1), one end of the transmission pin (5) extends out of the driving hole (32) and is arranged in the transmission hole (12).

6. The planetary carrier and sun gear transmission connection structure of claim 5, wherein, A plurality of pin holes (33) are arranged in a radial direction on the transmission seat (3), and the pin holes (33) are in communication with the driving holes (32); A lock hole (51) is arranged in a radial direction on the transmission pin (5), and a spring pin (6) is arranged in the pin hole (33) and the lock hole (51).

7. The planetary carrier and sun gear transmission connection structure of claim 6, wherein, A positioning groove (34) is arranged on the inner wall of the driving hole (32) away from the primary planetary carrier (1); A positioning block (52) is arranged on the side wall of the transmission pin (5) away from the primary planetary carrier (1), when the positioning block (52) is embedded in the positioning groove (34), the pin hole (33) and the lock hole (51) are coaxially communicated.

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