Novel planetary gear transmission

Abstract

The utility model discloses a novel planetary gear transmission, which belongs to the technical field of planetary gear transmissions, and particularly comprises a planetary gear ring, a plurality of planetary gears, a sun gear and a planetary carrier used for connecting all the planetary gears, the planetary gear ring, the planetary gears and the sun gear are sequentially meshed, the planetary gears are sleeved outside a bearing, the bearing is sleeved on a pin shaft, and the pin shaft is sleeved on the planetary gear ring. The pin shaft is connected with the planet carrier, a radial adjusting assembly is arranged on the pin shaft, and the radial adjusting assembly comprises an abutting piece capable of moving outwards in the radial direction of the pin shaft and a position fixing assembly used for fixing the abutting piece after the abutting piece moves outwards. According to the scheme, after sleeving of the bearing and the planet wheel is completed, the bearing is arranged on the pin shaft in a sleeving mode, abuts against the inner ring of the bearing through the abutting piece and then is fixed through the fixing assembly, close fit between the bearing and the pin shaft is achieved, and the fault risk caused by large-force operation when the bearing and the pin shaft are matched is effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to planetary gear transmission technical field, especially a kind of novel planetary gear transmission. BACKGROUND

[0002] Planetary gear transmission belongs to a kind of gear box, it is by planetary gear ring, sun gear, planetary gear planetary carrier and gear wheel shaft composition, according to the movement relationship of gear ring, sun gear and planetary gear, it can realize input shaft and output shaft to separate rigid transmission relationship, input shaft and output shaft same direction or reverse transmission and input and output shaft transmission ratio change, and it is widely used in land use, navigation, aviation and other means of transport.

[0003] In the existing planetary gear, when assembling planetary gear and planetary carrier, the conventional way is to set bearing in a pin shaft sleeve, planetary gear is set outside the bearing, and the connection of multiple planetary gears is realized by fixing pin shaft and planetary carrier.

[0004] In the assembly of planetary gear and planetary carrier, in order to avoid the friction between bearing and pin shaft (which will increase the wear between workpieces and generate heat energy), pin shaft and bearing need to be fixed, and the conventional method is to knock pin shaft into bearing by interference fit, which is not only inconvenient to assemble and disassemble, but also easy to cause damage to workpieces, and even eccentricity occurs in inner and outer rings of bearing, which will easily cause failure of precise fitting planetary gear transmission and seriously affect service life. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of novel planetary gear transmission to solve the problems raised in the above background.

[0006] To achieve the above object, the utility model employs one technical scheme: a kind of novel planetary gear transmission, including planetary gear ring, several planetary gears, sun gear and planetary carrier for connecting all planetary gears, the planetary gear ring, planetary gear and sun gear are engaged in turn, the planetary gear is set in bearing outside, the bearing is set on a pin shaft, the pin shaft is connected with planetary carrier, radial adjusting assembly is arranged on the pin shaft, the radial adjusting assembly includes the abutting piece that can move along the pin shaft radially outward and the position fixing assembly for fixing abutting piece after outward movement.

[0007] Preferably, the fixing assembly includes pushing piece for pushing abutting piece to move outward and fixing piece for fixing the relative position between pushing piece and pin shaft.

[0008] Preferably, a taper hole coaxial with the pin shaft is formed on the pin shaft, the pusher is a taper column matching the taper hole, a threaded hole is formed on the end surface of the small-diameter end of the pusher, a connecting hole penetrating the taper hole in the axial direction is formed on the pin shaft, the fixing member is threadedly connected with the pusher through the connecting hole, a guide groove penetrating the taper hole is formed on the pin shaft, and the abutting member slides in the guide groove.

[0009] Preferably, anti-skid lines are arranged on the circumferential wall of the abutting member abutting against the bearing.

[0010] Preferably, anti-skid lines are arranged on the taper surface of the pusher.

[0011] Preferably, a fixing portion is arranged on the large-diameter end surface of the pusher to prevent the pusher from rotating in the taper hole.

[0012] Preferably, a plurality of abutting members are distributed in the circumferential direction of the pin shaft.

[0013] The beneficial effects of the present application are as follows: after the bearing and the planet wheel are sleeved, the bearing is sleeved on the pin shaft, the abutting member abuts against the inner ring of the bearing, and then the fixing assembly is fixed, thereby realizing the close cooperation between the bearing and the pin shaft, and effectively reducing the risk of failure caused by heavy operation when the bearing cooperates with the pin shaft. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a schematic diagram of the overall structure of the present application;

[0015] Figure 2 is an exploded view of the present application;

[0016] Figure 3 is a schematic diagram of the assembly relationship of the pin shaft and the radial adjustment assembly in the present application;

[0017] Figure 4 is an exploded view of the pin shaft and the radial adjustment assembly in the present application;

[0018] Figure 5 is a sectional view of the pin shaft and the radial adjustment assembly after assembly in the present application;

[0019] In the figure: 1, planet gear ring; 2, planet wheel; 3, sun gear; 4, planet carrier; 5, pin shaft; 6, bearing; 7, pusher; 8, abutting member; 9, fixing member; 10, guide groove; 11, threaded hole. DETAILED DESCRIPTION

[0020] The preferred embodiments of the present application will be described in detail below with reference to the accompanying drawings, so that the advantages and features of the present application can be more easily understood by those skilled in the art, and the protection scope of the present application can be more clearly defined.

[0021] Embodiment:

[0022] Referring to Figure 1 , Figure 2 , Figure 3 , a new planetary gear transmission comprises a planetary gear ring 1, a plurality of planetary gears 2, a sun gear 3 and a planet carrier 4 for connecting all planetary gears 2, the planetary gear ring 1, the planetary gears 2 and the sun gear 3 are sequentially engaged, the planetary gears 2 are sleeved on a bearing 6, the bearing 6 is sleeved on a pin shaft 5, the pin shaft 5 is connected with the planet carrier 4, the pin shaft 5 is provided with a radial adjusting assembly, the radial adjusting assembly comprises a abutting piece 8 capable of moving radially outward along the pin shaft 5 and a fixing assembly for fixing the position of the abutting piece 8 after moving outward.

[0023] Referring to Figure 3 , Figure 4 , Figure 5 , wherein the fixing assembly comprises a pushing piece 7 for pushing the abutting piece 8 to move outward and a fixing piece 9 for fixing the relative position between the pushing piece 7 and the pin shaft 5, specifically, the pin shaft 5 is provided with a tapered hole coaxial with the pin shaft 5, the pushing piece 7 is a tapered column matching the shape of the tapered hole, the end face of the small diameter of the pushing piece 7 is provided with a threaded hole 11, the pin shaft 5 is provided with a connecting hole penetrating into the tapered hole along the axial direction, the fixing piece 9 is threadedly connected with the pushing piece 7 through the connecting hole, the fixing piece 9 can adopt a bolt, the head of the bolt abuts against the end face of the pin, and the extension amount of the abutting piece 8 can be controlled by the connection depth of the fixing piece 9 and the threaded hole 11 of the pushing piece 7, wherein the pin shaft 5 is provided with a guide groove 10 penetrating through the tapered hole, and the abutting piece 8 slides in the guide groove 10.

[0024] Wherein the surface of the abutting piece 8 in contact with the pushing piece 7 matches the tapered surface of the pushing piece 7, and the circumferential wall of the abutting piece 8 in contact with the bearing 6 is provided with anti-skid lines.

[0025] Wherein the tapered surface of the pushing piece 7 is provided with anti-skid lines.

[0026] Wherein the large diameter end face of the pushing piece 7 is provided with a fixing part to avoid rotation in the tapered hole, and in this scheme, the fixing part can be a hexagonal hole opened on the end face, and the fixing part is connected with a corresponding wrench or tool to realize that the fixing piece 9 and the pushing piece 7 will not rotate in the same direction when they are connected.

[0027] Wherein the abutting piece 8 is distributed circumferentially along the pin shaft 5, for example, it can be 2, 3 or 4.

[0028] Working principle and process:

[0029] The product of the scheme is first sleeved and fixed between the planetary wheel 2 and the bearing 6 during the transfer, then the pushing piece 7 and the fixing piece 9 are pre-fixed, the abutting piece 8 is put into the guide groove 10, then the pin shaft 5 is inserted into the inner ring of the bearing 6, the fixed part of the pushing piece 7 is fixed after the position is adjusted, then the fixing piece 9 is rotated to connect with the pushing piece 7 until the fixing piece 9 cannot be rotated, thus the abutting action of the abutting piece 8 and the inner ring of the bearing 6 is completed.

[0030] The above is only an embodiment of the present application, and does not limit the patent range of the present application, and any equivalent structural transformation, direct or indirect application in other related technical fields by using the content of the present application specification and drawings are also included in the patent protection range of the present application.

Claims

1. A new type of planetary gear transmission, comprising a planetary gear ring (1), a plurality of planetary gears (2), a sun gear (3) and a planet carrier (4) for connecting all planetary gears (2), the planetary gear ring (1), the planetary gears (2) and the sun gear (3) being engaged in sequence, the planetary gears (2) being sleeved outside a bearing (6), the bearing (6) being sleeved on a pin shaft (5), the pin shaft (5) being connected with the planet carrier (4), characterized in that: The pin shaft (5) is provided with a radial adjusting assembly, which comprises a abutting piece (8) capable of moving radially outward along the pin shaft (5) and a fixing assembly for fixing the outward moving position of the abutting piece (8). ​ 2. A novel planetary wheel transmission as claimed in claim 1, wherein: The fixing assembly comprises a pushing piece (7) for pushing the abutting piece (8) to move outward and a fixing piece (9) for fixing the relative position between the pushing piece (7) and the pin shaft (5).

3. A novel planetary wheel transmission as claimed in claim 2, wherein: The pin shaft (5) is provided with a coaxial tapered hole, the pushing piece (7) is a tapered column matching the shape of the tapered hole, the end surface of the small diameter of the pushing piece (7) is provided with a threaded hole (11), the pin shaft (5) is provided with a connecting hole penetrating into the tapered hole along the axial direction, the fixing piece (9) is threadedly connected with the pushing piece (7) through the connecting hole, the pin shaft (5) is provided with a guide groove (10) penetrating through the tapered hole, and the abutting piece (8) slides in the guide groove (10).

4. A novel planetary wheel transmission as claimed in claim 3, wherein: The abutting piece (8) is provided with anti-skid lines on the circumferential wall abutting against the bearing (6).

5. A novel planetary wheel transmission as claimed in claim 4, characterized in that: The tapered surface of the pushing piece (7) is provided with anti-skid lines.

6. A novel planetary wheel transmission as claimed in claim 3, wherein: The large diameter end surface of the pushing piece (7) is provided with a fixing part to avoid its rotation in the tapered hole.

7. A new planetary gear variator according to claim 1 characterized by: The abutting piece (8) is distributed circumferentially along the pin shaft (5).

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