Axial positioning structure of floating sun gear

Abstract

The utility model discloses an axial positioning structure of a floating sun gear, which comprises a transmission shaft, the outer side wall of the transmission shaft is fixedly connected with a limiting pin in the middle, the transmission shaft is slidably connected with a sun gear main body through the limiting pin, and the upper side wall and the lower side wall of the sun gear main body are both rotatably connected with supporting plates. A plurality of limiting rods are fixedly connected to the side wall, away from the sun gear body, of the supporting plate. A reset spring is arranged on the outer side wall of each limiting rod, a locking check block is slidably connected to the side, away from the sun gear body, of each limiting rod, and limiting taper sleeves are installed at the upper end and the lower end of the transmission shaft correspondingly. According to the sun gear assembly, the two supporting plates can position the sun gear body in the axial direction, the locking check blocks can limit the sliding range of the supporting plates, the impact resistance of a system can be effectively improved through combination of the two supporting plates and the locking check blocks, load distribution is more uniform, and vibration and noise of the system are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of sun gears, in particular to an axial positioning structure of a floating sun gear. Background Art

[0002] Compared with ordinary gear reducers, planetary gear reducers have the advantages of small size, light weight, high efficiency and wide power transmission range. The sun gear is the basic component of the epicyclic gear system. In the planetary gear system, the outer gear that serves as the central gear is called the sun gear.

[0003] The sun gear in the NW planetary reduction mechanism is required to have floating properties to achieve the load-balanced characteristics of the gear transmission. Figure 3 As shown in the figure, a retaining ring groove is set at the end of the sun gear, and the spacer is fixed by the retaining ring. The inner hole of the spacer passes through the bolt to tighten the spacer and the motor shaft to achieve the axial positioning of the sun gear and the motor shaft. However, after the bolt is tightened, the spline connection between the sun gear and the motor shaft is a rigid connection, which can only achieve torque transmission, and the sun gear has no floating space. When the gear transmission system is subjected to impact load, it is not conducive to load uniformity, which will cause large vibration and noise in the gear transmission system. Utility Model Content

[0004] The purpose of the utility model is to solve at least one of the technical problems existing in the prior art, and to provide an axial positioning structure of a floating sun gear. The device is provided with a support plate and a locking block. The two support plates can position the axial direction of the sun gear body, and the locking block can limit the sliding range of the support plate. The combination of the two can effectively improve the impact resistance of the system, make the load distribution more uniform, and reduce the vibration and noise of the system.

[0005] The device is provided with a fixing bolt, a friction pad and a limiting cone sleeve. The setting of the fixing bolt and the friction pad can position the locking block radially, and the limiting cone sleeve can prevent the locking block from moving outward. The combination of the three can effectively provide the stability of the device.

[0006] The utility model also provides an axial positioning structure with the above-mentioned floating sun gear, comprising: a transmission shaft, an outer side wall of the transmission shaft and a limit pin fixedly connected in the middle, the transmission shaft is slidably connected to a sun gear body through the limit pin, the upper side wall and the lower side wall of the sun gear body are both rotatably connected to a support plate, and a side wall of the support plate away from the sun gear body is fixedly connected to a plurality of limit rods;

[0007] A return spring is provided on the outer wall of each limit rod, and a locking block is slidably connected to the side of the limit rod away from the sun gear body. Limiting cone sleeves are installed on the upper and lower ends of the transmission shaft, and a threaded hole is provided inside each locking block, and a fixing bolt is connected to the internal thread of the threaded hole.

[0008] According to the axial positioning structure of a floating sun gear, a matching gap is provided between the limit pin and the sun gear body to facilitate the floating of the sun gear body.

[0009] According to the axial positioning structure of the floating sun gear, the support plate cooperates with the transmission shaft to improve the stability of the support plate.

[0010] According to the axial positioning structure of a floating sun gear, the side of the limiting cone sleeve close to the sun gear body is set to be conical, and the limiting cone sleeve cooperates with the locking block to limit the locking block from moving outward.

[0011] According to the axial positioning structure of a floating sun gear, a side wall of the locking block close to the sun gear body is provided with a plurality of inner sliding grooves, and the inner sliding grooves are slidably connected to the limiting rod, thereby improving the sliding stability of the limiting rod.

[0012] According to the axial positioning structure of a floating sun gear, the return spring is arranged between the locking block and the support plate, so as to improve the floating stability of the sun gear body.

[0013] According to the axial positioning structure of the floating sun gear, a friction pad is provided on the side of the threaded hole close to the transmission shaft to improve the connection effect between the locking block and the limiting cone sleeve.

[0014] According to the axial positioning structure of the floating sun gear, a cross groove is arranged on the outer side of the fixing bolt to facilitate driving the fixing bolt to rotate.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0017] Figure 1 This is a structural schematic diagram of an axial positioning structure of a floating sun gear of the utility model;

[0018] Figure 2 It is a front schematic diagram of an axial positioning structure of a floating sun gear of the utility model;

[0019] Figure 3 It is a cross-sectional schematic diagram of an axial positioning structure of a floating sun gear of the utility model;

[0020] Figure 4 It is a top view schematic diagram of an axial positioning structure of a floating sun gear of the utility model.

[0021] Legend:

[0022] 1. Transmission shaft; 101. Limit cone sleeve; 2. Locking block; 201. Fixing bolt; 2011. Cross groove; 202. Limit rod; 203. Return spring; 204. Inner slide groove; 205. Friction pad; 3. Sun gear body; 301. Limit pin; 4. Support plate. DETAILED DESCRIPTION

[0023] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0024] In the description of the present utility model, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model; the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0025] Reference Figure 1-4The utility model embodiment provides an axial positioning structure of a floating sun gear, which includes: a transmission shaft 1, an outer wall of the transmission shaft 1 and a limiting pin 301 fixedly connected in the middle, a matching gap is set between the limiting pin 301 and the sun gear body 3, so that the sun gear body 3 can float, the transmission shaft 1 is slidingly connected to the sun gear body 3 through the limiting pin 301, the upper side wall and the lower side wall of the sun gear body 3 are rotatably connected to the support plate 4, the support plate 4 cooperates with the transmission shaft 1 to improve the stability of the support plate 4, and a side wall of the support plate 4 away from the sun gear body 3 is fixedly connected to a plurality of limiting rods 202.

[0026] The outer wall of each limit rod 202 is provided with a return spring 203, and the return spring 203 is arranged between the locking block 2 and the support plate 4, so as to improve the floating stability of the sun gear body 3. The side of the limit rod 202 away from the sun gear body 3 is slidably connected with the locking block 2, and the side wall of the locking block 2 close to the sun gear body 3 is provided with a plurality of inner grooves 204. The inner grooves 204 are slidably connected with the limit rod 202 to improve the sliding stability of the limit rod 202. The upper and lower ends of the transmission shaft 1 are both equipped with limit cones. Sleeve 101, the side of the limiting cone sleeve 101 close to the sun gear body 3 is set to be conical, the limiting cone sleeve 101 cooperates with the locking block 2 to limit the locking block 2 from moving outward, each locking block 2 is provided with a threaded hole inside, the internal thread of the threaded hole is connected with a fixing bolt 201, and a friction pad 205 is provided on the side of the threaded hole close to the transmission shaft 1 to improve the connection effect between the locking block 2 and the limiting cone sleeve 101, and a cross groove 2011 is provided on the outside of the fixing bolt 201 to facilitate the fixing bolt 201 to rotate.

[0027] Working principle: The device is provided with a support plate 4 and a locking block 2. The two support plates 4 can position the axial direction of the sun gear body 3, and the locking block can limit the sliding range of the support plate 4. The combination of the two can effectively improve the impact resistance of the system, make the load distribution more uniform, and reduce the vibration and noise of the system. The device is provided with a fixing bolt 201, a friction pad 205 and a limiting cone sleeve 101. The setting of the fixing bolt 201 and the friction pad 205 can position the locking block 2 radially, and the limiting cone sleeve 101 can prevent the locking block 2 from moving outward. The combination of the three can effectively provide the stability of the device.

[0028] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. An axial positioning structure of a floating sun gear, characterized in that: include: A transmission shaft (1), an outer wall of the transmission shaft (1) being fixedly connected to a limiting pin (301) at the middle thereof, the transmission shaft (1) being slidably connected to a sun gear body (3) via the limiting pin (301), an upper side wall and a lower side wall of the sun gear body (3) being rotatably connected to a support plate (4), and a side wall of the support plate (4) away from the sun gear body (3) being fixedly connected to a plurality of limiting rods (202); The outer wall of each of the limit rods (202) is provided with a return spring (203); the side of the limit rod (202) away from the sun gear body (3) is slidably connected with a locking block (2); the upper and lower ends of the transmission shaft (1) are both installed with a limit cone sleeve (101); each of the locking blocks (2) is provided with a threaded hole inside, and the internal thread of the threaded hole is connected with a fixing bolt (201).

2. The axial positioning structure of a floating sun gear according to claim 1, characterized in that: A matching clearance is provided between the limiting pin (301) and the sun gear body (3).

3. The axial positioning structure of a floating sun gear according to claim 1, characterized in that: The support plate (4) is matched with the transmission shaft (1).

4. The axial positioning structure of a floating sun gear according to claim 1, characterized in that: The side of the limiting cone sleeve (101) close to the sun gear body (3) is configured in a cone shape, and the limiting cone sleeve (101) cooperates with the locking block (2).

5. The axial positioning structure of a floating sun gear according to claim 1, characterized in that: A side wall of the locking block (2) close to the sun gear body (3) is provided with a plurality of inner sliding grooves (204), and the inner sliding grooves (204) are slidably connected to the limiting rod (202).

6. The axial positioning structure of a floating sun gear according to claim 1, characterized in that: The return spring (203) is arranged between the locking block (2) and the support plate (4).

7. The axial positioning structure of a floating sun gear according to claim 1, characterized in that: A friction pad (205) is provided on one side of the threaded hole close to the transmission shaft (1).

8. The axial positioning structure of a floating sun gear according to claim 1, characterized in that: A cross groove (2011) is provided on the outer side of the fixing bolt (201).

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