Axial positioning device for planet carrier component of walking speed reducer of flat transport vehicle

Abstract

The utility model discloses an axial positioning device for a planet carrier component of a walking speed reducer of a flat plate transport vehicle, relates to the technical field of walking speed reducers of engineering machinery, and aims to solve the technical problems of loud noise and quick abrasion of a positioning surface when the walking speed reducer of the existing flat plate transport vehicle runs at a no-load high speed. According to the axial positioning device for the planet carrier component of the walking speed reducer of the flat plate transport vehicle, deep groove ball bearing installation positioning steps are arranged at the right end of a first sun gear and the two ends of a second sun gear correspondingly, and the deep groove ball bearing installation positioning steps are used for axial positioning of deep groove ball bearings; and a stepped interference positioning sleeve is mounted between the deep groove ball bearings in the first sun gear and the second sun gear, and is used for realizing axial positioning of rolling friction.

Description

TECHNICAL FIELD

[0001] The utility model relates to engineering machinery walking speed reducer technical field especially, relates to a kind of flat transport vehicle walking speed reducer planetary carrier component axial positioning device, in particular to a kind of axial positioning device between the planetary carrier component of the walking speed reducer of the two-stage or more planetary gear transmission of flat transport vehicle. BACKGROUND

[0002] At present, flat transport vehicle is often used in narrow place such as airport, port and warehouse, and is used for the transfer of bulk goods or the translation of equipment, which can reduce the consumption of manpower and forklift. In a specific closed area, a special electric flat transport vehicle can be customized, and a safe and environmentally friendly interval material transportation can be realized by combining an intelligent control system.

[0003] Compared with traditional construction machinery, the flat transport vehicle used for the transfer of equipment or bulk goods is relatively stable when carrying goods; however, in order to improve work efficiency, the speed of the flat transport vehicle is generally increased when returning empty, which poses another challenge to the wheel-side walking speed reducer.

[0004] Specifically, when the flat transport vehicle returns empty, the input end speed of the walking speed reducer can reach 5000 rpm, and a higher input speed will inevitably increase the wear between the axial positioning surfaces of the planetary carrier components, increase the operating noise of the speed reducer, and reduce the service life of the speed reducer.

[0005] In other words, the axial positioning between the planetary carrier components of the existing flat transport vehicle walking speed reducer is mostly the hardening positioning of the sun gear end face, and if the positioning surfaces lack lubrication under the condition of high speed, the positioning surfaces will be worn or even sintered. UTILITY MODEL CONTENTS

[0006] The utility model aims at providing a kind of flat transport vehicle walking speed reducer planetary carrier component axial positioning device, to solve the technical problems of the existing flat transport vehicle walking speed reducer in the high-speed operation of empty load, such as big noise and fast wear of positioning surface.

[0007] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0008] A kind of flat transport vehicle walking speed reducer planetary carrier component axial positioning device, comprising: first sun gear and second sun gear, the right end of the first sun gear and the two ends of the second sun gear are provided with deep groove ball bearing installation positioning step, and the deep groove ball bearing installation positioning step is used for the axial positioning of deep groove ball bearing;

[0009] The stepped interference positioning sleeve is arranged between the deep groove ball bearings in the first sun gear and the second sun gear, and is used for realizing the axial positioning of rolling friction.

[0010] In actual application, one of the deep groove ball bearings is assembled in the first sun gear, and the deep groove ball bearing is in clearance fit with the inner hole of the first sun gear.

[0011] The stepped interference positioning sleeve is assembled in the second sun gear, and is in interference fit with the inner hole of the first sun gear, so as to lock the bearing.

[0012] Specifically, the planetary carrier component in which the first sun gear is assembled is contacted with the right end face of the input spline shaft sleeve by the left end face of the inner ring of the deep groove ball bearing, so as to play the role of axial positioning.

[0013] Further, the remaining two deep groove ball bearings are assembled in the second sun gear, and are in interference fit with the inner hole of the second sun gear, and the interference amount can be used to ensure that the deep groove ball bearing cannot fall from the inner hole of the second sun gear.

[0014] Further, the planetary carrier component in which the second sun gear is assembled is contacted with the right end face of the stepped interference positioning sleeve by the left end face of the inner ring of the deep groove ball bearing, so as to play the role of axial positioning.

[0015] Further, the gear shaft is assembled, and the left end face of the gear part of the gear shaft is contacted with the right end face of the inner ring of the deep groove ball bearing, so as to play the role of axial positioning.

[0016] Further, the device is mounted in the driving wheel hub of the flat transport vehicle, and is suitable for the planetary gear transmission structure with more than two stages.

[0017] Compared with the prior art, the flat transport vehicle walking speed reducer planetary carrier component axial positioning device has the following advantages:

[0018] In the axial positioning device for the planetary carrier component of the flatbed transport vehicle travel reducer provided by this utility model, deep groove ball bearing mounting and positioning steps are provided at the right end of the first sun gear and at both ends of the second sun gear, and the deep groove ball bearing mounting and positioning steps are used for axial positioning of the deep groove ball bearings; a stepped interference fit sleeve is installed between the deep groove ball bearings in the first sun gear and the second sun gear, and the stepped interference fit sleeve is used to realize axial positioning by rolling friction. Therefore, the combined positioning device of deep groove ball bearings and stepped interference fit sleeves can convert the sliding friction between the axial positioning surfaces of the planetary carrier component of the flatbed transport vehicle travel reducer into rolling friction through the deep groove ball bearings, thereby achieving the purpose of reducing noise, reducing wear on the positioning surfaces, and improving service life when the reducer is running at high speed. Attached Figure Description

[0019] Figure 1 This is a partial cross-sectional view of the axial positioning device for the planetary carrier component of the flatbed transport vehicle travel reducer provided in an embodiment of this utility model.

[0020] Figure label:

[0021] 1-Input spline bushing; 2-Gear shaft; 3-First sun gear; 4-Second sun gear; 5-Stepped interference fit sleeve; 6-Deep groove ball bearing. Detailed Implementation

[0022] For ease of understanding, the axial positioning device for the planetary carrier component of the flatbed transport vehicle travel reducer provided in this embodiment of the invention will be described in detail below with reference to the accompanying drawings.

[0023] This utility model embodiment provides an axial positioning device for the planetary carrier component of the traveling reducer of a flatbed transport vehicle, such as... Figure 1 As shown, it includes: a first sun gear 3 and a second sun gear 4. The right end of the first sun gear 3 and both ends of the second sun gear 4 are provided with deep groove ball bearing mounting and positioning steps, and the deep groove ball bearing mounting and positioning steps are used for axial positioning of the deep groove ball bearing 6.

[0024] A stepped interference fit sleeve 5 is installed between the deep groove ball bearings 6 in the first sun gear 3 and the second sun gear 4, and the stepped interference fit sleeve 5 is used to achieve axial positioning for rolling friction.

[0025] Compared with the prior art, the axial positioning device for the planetary carrier component of the flatbed transport vehicle travel reducer described in this embodiment of the invention has the following advantages:

[0026] The axial positioning device of the planetary carrier component of the flatbed truck walking speed reducer provided by the embodiment of the utility model, because the right end of the first sun gear 3 and the two ends of the second sun gear 4 are provided with deep groove ball bearing mounting positioning steps, and the deep groove ball bearing mounting positioning steps are used for the axial positioning of the deep groove ball bearing 6, the deep groove ball bearing 6 between the first sun gear 3 and the second sun gear 4 is provided with a stepped interference positioning sleeve 5, and the stepped interference positioning sleeve 5 is used for realizing the axial positioning of rolling friction, therefore the combination positioning device of the deep groove ball bearing 6 and the stepped interference positioning sleeve 5 can convert the sliding friction between the axial positioning surfaces of the flatbed truck walking speed reducer planetary carrier component into rolling friction, so that the purpose of reducing noise, reducing the wear of the positioning surface and prolonging the service life during the high-speed operation of the speed reducer is achieved.

[0027] In actual application, as shown in the figure, Figure 1 One of the deep groove ball bearings 6 is assembled in the first sun gear 3, and the deep groove ball bearing 6 and the inner hole of the first sun gear 3 adopt a clearance fit mode, so as to be more convenient for assembly.

[0028] As shown in the figure, Figure 1 The above-mentioned stepped interference positioning sleeve 5 is assembled in the second sun gear 4, and the stepped interference positioning sleeve 5 and the inner hole of the first sun gear 4 adopt an interference fit mode, so as to lock the bearing, thereby effectively ensuring that the deep groove ball bearing 6 does not axially move during the high-speed operation of the speed reducer.

[0029] Specifically, as shown in the figure, Figure 1 The planetary carrier component in which the first sun gear 3 is assembled, and the inner ring left end surface of the deep groove ball bearing 6 is in contact with the right end surface of the input spline shaft sleeve, so as to play an axial positioning role.

[0030] Further, as shown in the figure, Figure 1 The remaining two deep groove ball bearings 6 are respectively assembled in the second sun gear 4, and the deep groove ball bearings 6 and the inner hole of the second sun gear 4 adopt an interference fit mode, and the interference amount can be used to ensure that the deep groove ball bearing 6 does not fall from the inner hole of the second sun gear 4, so as to effectively avoid the falling of the deep groove ball bearing 6 in the subsequent installation step.

[0031] Still further, as shown in the figure, Figure 1 The planetary carrier component in which the second sun gear 4 is assembled, and the inner ring left end surface of the deep groove ball bearing 6 is in contact with the right end surface of the stepped interference positioning sleeve 5, so as to play an axial positioning role.

[0032] Still further, as shown in the figure, Figure 1 The gear shaft 2 is assembled, and the gear part left end surface of the gear shaft 2 is in contact with the inner ring right end surface of the deep groove ball bearing 6, so as to play an axial positioning role.

[0033] Further, as shown in Figure 1 The axial positioning device of the planetary carrier component of the flat transport vehicle walking speed reducer provided by the embodiment of the utility model is installed in the driving wheel hub of the flat transport vehicle and is suitable for the planetary gear transmission structure with more than two stages.

[0034] In summary, the axial positioning device of the planetary carrier component of the flat transport vehicle walking speed reducer provided by the embodiment of the utility model mainly has the following advantages:

[0035] I. The deep groove ball bearing is used for axial positioning, which avoids the rapid wear of the hardening layer when the rotating speed is too high.

[0036] II. For the walking speed reducer with more than two stages of transmission, the stepped interference positioning sleeve is used for connection between the adjacent planetary carrier components, and the left and right end faces of the stepped interference positioning sleeve are in contact with the inner and outer rings of the adjacent two deep groove ball bearings and are used for axial positioning, so that the application of the stepped interference positioning sleeve can ensure the normal rotation of the deep groove ball bearings installed in the sun gears with different rotating speeds without wear of the inner and outer rings, and can also avoid the direct contact between the sun gear end faces of the adjacent planetary carrier components and the wear thereof.

[0037] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited to this, and any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model. Therefore, the protection scope of the utility model should be subject to the protection scope of the claims.

Claims

1. An axial positioning device for the planetary carrier component of a flatbed transport vehicle's travel reducer, characterized in that, include: The first sun gear and the second sun gear, the right end of the first sun gear and both ends of the second sun gear are provided with deep groove ball bearing mounting and positioning steps, and the deep groove ball bearing mounting and positioning steps are used for axial positioning of the deep groove ball bearing; A stepped interference fit sleeve is installed between the deep groove ball bearings in the first sun gear and the second sun gear, and the stepped interference fit sleeve is used to achieve axial positioning for rolling friction.

2. The axial positioning device for the planetary carrier component of the flatbed transport vehicle's travel reducer according to claim 1, characterized in that, One of the deep groove ball bearings is assembled in the first sun gear, and the deep groove ball bearing and the inner hole of the first sun gear are in clearance fit.

3. The axial positioning device for the planetary carrier component of the flatbed transport vehicle's travel reducer according to claim 2, characterized in that, The stepped interference fit sleeve is fitted into the second sun gear, and the stepped interference fit sleeve and the inner hole of the first sun gear are in an interference fit manner to lock the bearing.

4. The axial positioning device for the planetary carrier component of the flatbed transport vehicle's travel reducer according to claim 3, characterized in that, The planetary carrier component containing the first sun gear is assembled, and the left end face of the inner ring of the deep groove ball bearing contacts the right end face of the input spline bushing to serve as an axial positioning element.

5. The axial positioning device for the planetary carrier component of the flatbed transport vehicle's travel reducer according to claim 4, characterized in that, The remaining two deep groove ball bearings are respectively assembled in the second sun gear, and the deep groove ball bearings and the inner hole of the second sun gear are interference fit. The interference fit is sufficient to ensure that the deep groove ball bearings will not fall out of the inner hole of the second sun gear.

6. The axial positioning device for the planetary carrier component of the flatbed transport vehicle's travel reducer according to claim 5, characterized in that, The planetary carrier component containing the second sun gear is assembled such that the left end face of the inner ring of the deep groove ball bearing contacts the right end face of the stepped interference fit sleeve to serve as an axial positioning element.

7. The axial positioning device for the planetary carrier component of the flatbed transport vehicle's travel reducer according to claim 6, characterized in that, The gear shaft is assembled such that the left end face of the gear portion of the gear shaft contacts the right end face of the inner ring of the deep groove ball bearing to serve as an axial positioning element.

8. The axial positioning device for the planetary carrier component of the flatbed transport vehicle's travel reducer according to claim 7, characterized in that, It is installed in the drive wheel hub of a flatbed transport vehicle and is suitable for planetary gear transmission structures with two or more stages.

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