Spline connecting structure for large-torque sun gear

Abstract

The utility model relates to the technical field of planetary gears, in particular to a spline connection structure for a large-torque sun gear, which comprises a planet carrier and a sun gear arranged in the planet carrier, a planet gear is arranged on the outer side of the planet carrier, a spline shaft is fixedly mounted on the inner side of the sun gear, and a spline shaft is arranged on the spline shaft. A spline connecting mechanism is arranged between the spline shaft and the planet carrier, by means of the spline connecting structure for the large-torque sun gear, by means of the structural design in the spline connecting mechanism, under meshing assembly of the inner spline and the outer spline, the connecting sleeve and the spline sleeve are connected in a sleeved mode, and under elastic supporting of the clamping spring, the large-torque sun gear can be stably connected. The clamping columns and the clamping holes are matched in a clamping mode, the fixing effect between the connecting sleeve and the spline sleeve is guaranteed, then the purpose of stably installing the sun gear is achieved, the situation that the sun gear and the planet carrier shake is effectively avoided, the transmission effect of the sun gear is improved, and follow-up use is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of planetary gears, in particular to a spline connection structure for a large torque sun gear. Background Art

[0002] In planetary gear transmission, when the sun gear transmits a large torque or has a large diameter, in order to ensure the connection strength and reduce costs, the sun gear and the connecting part are often manufactured separately, and then the connecting part with an inner hole is mounted on the sun gear in the form of a spline.

[0003] A spline connection structure for a large torque sun gear currently in use has been found through searching, for example, in a Chinese patent document with the authorization publication number CN218347910U, a sun gear connection structure is disclosed, including a planet carrier body, a sun gear body and a copper sleeve body, the planet carrier body including a planet carrier end face and a planet carrier convex end arranged at the center of the planet carrier end face, the copper sleeve body is sleeved on the planet carrier convex end, the copper sleeve body is fixed by mounting bolts, and the sun gear body is assembled and arranged on the planet carrier convex end of the planet carrier body by a center bolt. The planet carrier body and the sun gear body of the utility model are segmented and easy to forge and process, which improves the accuracy of the sun gear body and reduces the noise generated by the transmission. At the same time, it can be disassembled for maintenance during maintenance, which reduces the maintenance cost, has high assembly accuracy, strong controllability, and its sun gear body has good transmission stability when subjected to large axial forces, and its service life is significantly improved.

[0004] Although the above patent solves the problems in the above background technology, it still has the following shortcomings: the sun gear and the planetary carrier are installed and fixed by the cooperation between bolts and threaded holes. In this installation method, the bolts are easily loosened due to vibration. Therefore, when in use, it causes shaking between the sun gear and the planetary carrier, which in turn affects the subsequent transmission effect of the sun gear and is not conducive to subsequent use.

[0005] In summary, the utility model solves the problems in the above-mentioned background technology by designing a spline connection structure for a large torque sun gear. Utility Model Content

[0006] The purpose of the utility model is to provide a spline connection structure for a large torque sun gear to solve the problems raised in the above background technology.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A spline connection structure for a large torque sun gear, comprising a planet carrier and a sun gear arranged inside the planet carrier, wherein the planet gear is arranged outside the planet carrier, a spline shaft is fixedly installed inside the sun gear, and a spline connection mechanism is arranged between the spline shaft and the planet carrier;

[0009] The spline connection mechanism includes a connecting sleeve and a spline sleeve. The connecting sleeve is fixedly installed on the rear surface of the planetary carrier, and an internal spline is fixedly arranged on its inner surface. A clamping hole is provided on the outer surface of the connecting sleeve. The spline sleeve is rotatably sleeved on the outer surface of the spline shaft through a bearing, and an external spline and an installation groove are respectively provided on its outer surface. A clamping spring and a clamping column are respectively provided inside the installation groove.

[0010] As a preferred solution of the utility model, the planetary wheels are respectively located at the end corners of the planetary carrier, and are rotatably connected to the planetary carrier via a shaft, and the outer surface of the planetary wheel does not contact the inner wall of the planetary carrier.

[0011] As a preferred solution of the utility model, the outer surface of the sun gear does not contact the inner wall surface of the planet carrier, and the planet gears are all meshed and connected with the sun gear.

[0012] As a preferred solution of the utility model, the internal spline and the external spline are fully meshed and assembled.

[0013] As a preferred solution of the utility model, an inner wall of one side of the clamping hole extends to the interior of the connecting sleeve.

[0014] As a preferred solution of the utility model, the mounting grooves are distributed equidistantly in a ring shape with respect to the outer surface of the spline sleeve, one end of the clamping spring is fixed to the inner wall of the mounting groove, and the other end thereof is fixed to one end surface of the clamping column, the outer surface of the clamping column is fitted with the inner wall of the mounting groove, and it is correspondingly clamped and connected with the clamping hole.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] In the utility model, a spline connection structure for a large torque sun gear is set up, thereby utilizing the structural design in the spline connection mechanism. Under the meshing assembly of the internal spline and the external spline, the connecting sleeve and the spline sleeve are socketed together. Under the elastic support of the clamping spring, the clamping column and the clamping hole form a clamping fit, thereby ensuring the fixing effect between the connecting sleeve and the spline sleeve, thereby achieving the purpose of firmly installing the sun gear, effectively avoiding the shaking of the sun gear and the planetary carrier, improving the transmission effect of the sun gear, and facilitating subsequent use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the planet carrier of the utility model;

[0019] Figure 3It is a schematic diagram of the partial exploded structure of the sun gear of the utility model.

[0020] In the figure: 1. planet carrier; 2. sun gear; 3. planet gear; 4. spline shaft; 5. spline connection mechanism; 501. connecting sleeve; 502. spline sleeve; 503. internal spline; 504. clamping hole; 505. external spline; 506. mounting groove; 507. clamping spring; 508. clamping column. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0022] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings, and several embodiments of the present invention are given. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0023] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may also be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in this article includes any and all combinations of one or more related listed items.

[0025] For examples, see Figure 1-3 , the utility model provides a technical solution:

[0026] A spline connection structure for a large torque sun gear, comprising a planet carrier 1 and a sun gear 2 arranged inside the planet carrier 1, a planet gear 3 is arranged outside the planet carrier 1, a spline shaft 4 is fixedly installed inside the sun gear 2, and a spline connection mechanism 5 is arranged between the spline shaft 4 and the planet carrier 1;

[0027] Specifically, the planetary gears 3 are respectively located at the end corners of the planetary carrier 1, and are rotatably connected to the planetary carrier 1 through a shaft body, the outer surface of the planetary gear 3 does not contact the inner wall of the planetary carrier 1, the outer surface of the sun gear 2 does not contact the inner wall surface of the planetary carrier 1, and the planetary gears 3 are meshed and connected with the sun gear 2;

[0028] In this embodiment, the meshing transmission arrangement between the sun gear 2 and the planetary gear 3 is mainly used to drive them to rotate.

[0029] In this embodiment, please refer to Figure 1 , Figure 2 and Figure 3 The spline connection mechanism 5 includes a connection sleeve 501 and a spline sleeve 502. The connection sleeve 501 is fixedly mounted on the rear surface of the planet carrier 1, and an internal spline 503 is fixedly arranged on its inner surface. A clamping hole 504 is provided on the outer surface of the connection sleeve 501. The spline sleeve 502 is rotatably sleeved on the outer surface of the spline shaft 4 through a bearing, and an external spline 505 and a mounting groove 506 are respectively provided on its outer surface. A clamping spring 507 and a clamping column 508 are respectively provided inside the mounting groove 506.

[0030] Specifically, the inner spline 503 is fully meshed with the outer spline 505, the inner wall of one side of the clamping hole 504 extends to the inside of the connecting sleeve 501, the mounting grooves 506 are equidistantly distributed in a ring shape with respect to the outer surface of the spline sleeve 502, one end of the clamping spring 507 is fixed to the inner wall of the mounting groove 506, and the other end thereof is fixed to one end surface of the clamping column 508, the outer surface of the clamping column 508 is fitted with the inner wall of the mounting groove 506, and it is correspondingly clamped and connected with the clamping hole 504;

[0031] In this embodiment, the inner spline 503 is mainly used to mesh with the outer spline 505, so that the spline sleeve 502 is in contact with the connecting sleeve 501, and the clamping spring 507 is mainly used to elastically support the clamping column 508, so that the clamping column 508 is plugged into the clamping hole 504, thereby achieving fixation between the spline sleeve 502 and the connecting sleeve 501, thereby achieving the effect of firmly installing the spline shaft 4 and the sun gear 2, and meeting the transmission requirements of the sun gear 2.

[0032] The working process of the utility model is as follows: when using a spline connection structure for a large torque sun gear, the sun gear 2 is first installed, and the sun gear 2 and the spline shaft 4 are moved. During the movement, the spline sleeve 502 is gradually brought close to the connecting sleeve 501 and ensures that the outer spline 505 and the inner spline 503 are fully meshed and in contact. When the clamping column 508 and the clamping hole 504 are located on the same straight line, the clamping spring 507 in a compressed state gradually stretches and drives the clamping column 508. The clamping column 508 slides along the inner wall of the installation groove 506 and gradually engages and contacts with the clamping hole 504, thereby completing the firm fixation between the spline sleeve 502 and the connecting sleeve 501. At the same time, the sun gear 2 is located on the inner side of the planetary carrier 1 and meshes with the planetary gear 3 for transmission, satisfying the subsequent transmission coordination.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A spline connection structure for a large torque sun gear, comprising a planet carrier (1) and a sun gear (2) arranged inside the planet carrier (1), characterized in that: A planetary gear (3) is arranged on the outer side of the planet carrier (1), a spline shaft (4) is fixedly mounted on the inner side of the sun gear (2), and a spline connection mechanism (5) is arranged between the spline shaft (4) and the planet carrier (1); The spline connection mechanism (5) comprises a connection sleeve (501) and a spline sleeve (502); the connection sleeve (501) is fixedly mounted on the rear side surface of the planet carrier (1), and an internal spline (503) is fixedly arranged on its inner surface; a clamping hole (504) is provided on the outer surface of the connection sleeve (501); the spline sleeve (502) is rotatably sleeved on the outer surface of the spline shaft (4) via a bearing, and an external spline (505) and a mounting groove (506) are respectively provided on its outer surface; a clamping spring (507) and a clamping column (508) are respectively provided inside the mounting groove (506).

2. A spline connection structure for a large torque sun gear according to claim 1, characterized in that: The planetary wheels (3) are respectively located at the end corners of the planetary carrier (1), and are rotatably connected to the planetary carrier (1) via a shaft body; the outer surface of the planetary wheel (3) does not contact the inner wall of the planetary carrier (1).

3. A spline connection structure for a large torque sun gear according to claim 1, characterized in that: The outer surface of the sun gear (2) does not contact the inner wall surface of the planet carrier (1), and the planet gears (3) are all meshingly connected with the sun gear (2).

4. A spline connection structure for a large torque sun gear according to claim 1, characterized in that: The internal spline (503) and the external spline (505) are fully meshed and assembled.

5. The spline connection structure for a large torque sun gear according to claim 1, characterized in that: An inner wall on one side of the clamping hole (504) extends to the interior of the connecting sleeve (501).

6. A spline connection structure for a large torque sun gear according to claim 1, characterized in that: The mounting grooves (506) are equidistantly distributed in a ring shape with respect to the outer surface of the spline sleeve (502); one end of the clamping spring (507) is fixed to the inner wall of the mounting groove (506), and the other end thereof is fixed to one end surface of the clamping column (508); the outer surface of the clamping column (508) is fitted to the inner wall of the mounting groove (506), and is correspondingly clamped and connected to the clamping hole (504).

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