CN215469545U

CN215469545U - Shafting structure of power head of walking machine

Info

Publication number: CN215469545U
Application number: CN202121853758.1U
Authority: CN
Inventors: 刘小松
Original assignee: Shenzhen Shute Machinery Co ltd
Current assignee: Shenzhen Shute Machinery Co ltd
Priority date: 2021-08-10
Filing date: 2021-08-10
Publication date: 2022-01-11
Anticipated expiration: 2031-08-10

Abstract

The utility model discloses a shafting structure of a power head of a walking machine, which comprises a power tool shaft and a box body for mounting the power tool shaft, wherein the box body is provided with a through hole for mounting the power tool shaft; the power tool shaft comprises a center shaft, and a gear assembly, a first bearing assembly, a second bearing assembly and a chuck assembly which are sequentially arranged on the center shaft. The tool shaft axial positioning device is simple in structure, adopts a through hole installation mode, avoids the problem of low installation precision of the traditional stepped hole, and meanwhile, the axial positioning step of the power tool shaft is fixed on the box body in a welding mode, so that the power tool shaft is ensured to be more accurate in installation and positioning, and the machining precision is ensured.

Description

Shafting structure of power head of walking machine

Technical Field

The utility model relates to the technical field of a walking machine device, in particular to a shafting structure of a power head of a walking machine.

Background

The rotary power cutter of the heart-walking machine is a standard configuration of heart-walking machine equipment, and a plurality of power cutter shafts are generally arranged on one power head. In order to meet the processing requirements of high precision and high efficiency, the rigidity and precision of the power tool shaft are very high. The shafting structure of the conventional power head of the walking machine adopts an angular contact ball bearing with poor rigidity, and the bearing mounting hole is a stepped hole, so that the precision after mounting is difficult to ensure.

Thus, the prior art has yet to be improved and enhanced.

SUMMERY OF THE UTILITY MODEL

In view of the defects of the prior art, the utility model aims to provide a shafting structure of a power head of a walking machine, and aims to solve the problem that the installation precision of the shafting structure of the power head of the walking machine is poor.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a shafting structure of a power head of a walking machine comprises a power tool shaft and a box body for mounting the power tool shaft, wherein a through hole for mounting the power tool shaft is formed in the box body; the power tool shaft comprises a center shaft, and a gear assembly, a first bearing assembly, a second bearing assembly and a chuck assembly which are sequentially arranged on the center shaft.

The gear assembly comprises a driving gear and a gear inner spacer sleeve, the driving gear is used for driving a power tool shaft, the driving gear is arranged on the central shaft through a connecting key, and the gear inner spacer sleeve and the axial positioning step are sequentially sleeved on the central shaft.

And a round nut for limiting is arranged on the other side of the driving gear.

The first bearing assembly comprises a first bearing, an outer bearing spacer bush and an inner bearing spacer bush, the first bearing and the inner bearing spacer bush are sleeved on the central shaft, the first bearing is arranged on one side of the inner bearing spacer bush, and the outer bearing spacer bush is sleeved on the outer side of the inner bearing spacer bush.

The second bearing assembly comprises a second bearing and a first sealing piece, the second bearing is sleeved on the central shaft and is arranged on the other side of the bearing inner spacer, and the supporting seat is connected with the central shaft through the first sealing piece.

The first sealing element is a double-lip framework oil seal.

The outside cover of supporting seat is equipped with and is used for sealed second sealing member, the second sealing member is O type sealing washer.

The chuck component comprises a chuck, the chuck is fixed at the end part of the central shaft through a nut, and the central shaft is provided with a mounting hole for mounting the chuck.

The axial positioning step is connected with the box body in a laser welding mode.

The first bearing and the second bearing are tapered roller bearings.

Compared with the prior art, the shafting structure of the power head of the walking machine comprises a power tool shaft and a box body for mounting the power tool shaft, wherein the box body is provided with a through hole for mounting the power tool shaft, one end of the power tool shaft is welded on the box body, and the other end of the power tool shaft is fixed on the box body through a support seat in a threaded connection manner; the power tool shaft comprises a center shaft, and a gear assembly, a first bearing assembly, a second bearing assembly and a chuck assembly which are sequentially arranged on the center shaft. The tool shaft fixing device is simple in structure, adopts a through hole installation mode, avoids the problem of low installation precision of the traditional stepped hole, and meanwhile, the power tool shaft is fixed on the box body in a welding and screwing mode, so that the installation and positioning of the power tool shaft are more accurate, and the machining precision is ensured.

Drawings

Fig. 1 is a schematic axial structure diagram of the power head of the walking machine provided by the utility model.

Fig. 2 is a sectional view of a shafting structure of the power head of the walking machine provided by the utility model.

Detailed Description

In order to make the objects, technical solutions and effects of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

It will be understood that when an element is referred to as being "on," "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present.

It should be noted that the terms of orientation such as left, right, up and down in the embodiments of the present invention are only relative to each other or are referred to the normal use state of the product, and should not be considered as limiting.

The utility model provides a shafting structure of a power head of a walking machine, and please refer to fig. 1 and fig. 2, the shafting structure comprises a power tool shaft 1 and a box body 100 for mounting the power tool shaft 1, wherein a through hole for mounting the power tool shaft 1 is arranged on the box body 100, one end of the power tool shaft 1 is provided with an axial positioning step 101, the axial positioning step 101 is welded on the box body 100, and the other end of the power tool shaft 1 is fixed on the box body 100 through a support seat 2 in a threaded connection manner; the power tool shaft 1 includes a center shaft 11, and a gear assembly 12, a first bearing assembly 13, a second bearing assembly 14, and a chuck assembly 15, which are sequentially disposed on the center shaft 11. The tool shaft mounting device is simple in structure, adopts a through hole mounting mode, avoids the problem of low mounting precision of the traditional stepped hole, and meanwhile, the axial positioning step 101 of the power tool shaft 1 is fixed on the box body 100 through welding, so that the mounting and positioning of the power tool shaft 1 are more accurate, and the machining precision is ensured.

The gear assembly 12 includes a driving gear 121 for driving the power tool shaft 1 and an inner gear spacer 122, the driving gear 121 is disposed on the central shaft 11 through a connecting key, and the inner gear spacer 122 and the axial positioning step 101 are sequentially sleeved on the central shaft 11. One side of the driving gear 121 is provided with a round nut for limiting. The round nut is located above the driving gear 121, the upper end face of the round nut is flush with the upper end face of the central shaft 11, the gear inner spacer 122 and the axial positioning step 101 are located below the driving gear 121, and the round nut is a YSR precision round nut.

The first bearing assembly 13 includes a first bearing, an outer bearing spacer 132 and an inner bearing spacer 133, the first bearing and the inner bearing spacer 133 are sleeved on the central shaft 11, the first bearing is disposed on one side of the inner bearing spacer 133, and the outer bearing spacer 132 is sleeved on the outer side of the inner bearing spacer 133. The second bearing assembly 14 includes a second bearing sleeved on the center shaft 11 and disposed on the other side of the bearing inner spacer 133, and a first sealing member 142, and the support seat 2 is connected to the center shaft 11 through the first sealing member 142.

The first sealing element 142 is a double-lip framework oil seal, and particularly, the first sealing element 142 is a TC double-lip framework oil seal, a TC double-lip framework oil seal and an externally-provided annular thread line, is easy to install, can strengthen and prevent external leakage and complement the fact that a cavity is slightly machined but not perfectly round, and has good sealing performance while not affecting load; the double-lip framework oil seal comprises a sealing lip and a dustproof lip, and the dustproof lip can prevent dust and impurities from entering the power tool shaft 1 from the position between the supporting seat 2 and the central shaft 11 so as to prevent the sealing lip from being damaged and enable the sealing lip to lose the sealing effect.

A second sealing element 21 for sealing is sleeved on the outer side of the supporting seat 2, the second sealing element 21 is an O-shaped sealing ring, an annular sealing groove is formed in the supporting seat 2, the second sealing element 21 is arranged in the annular sealing groove, and the outer ring of the second sealing element 21 is in contact with the box body 100; by means of said second seal 21, dust and impurities are prevented from entering between the housing 100 and the power tool shaft 1.

The chuck assembly 15 includes a chuck 151, the chuck 151 is fixed to an end of the central shaft 11 by a nut 152, and a mounting hole for mounting the chuck 151 is formed on the central shaft 11.

The axial positioning step 101 is connected with the box body 100 in a laser welding mode, and the laser welding mode is adopted, so that almost no heat is generated in the welding process, and the precision of the bearing after installation is easily ensured.

The first bearing 131 and the second bearing 141 are tapered roller bearings, and the first bearing 131 and the second bearing 141 are oppositely disposed at the upper and lower ends of the bearing outer spacer 132 and the bearing inner spacer 133. The traditional shafting structure adopts 5 7902 angular contact ball bearings, so that the price is high, and the two P4-grade tapered roller bearings are adopted in the bearing device, so that the bearing consumption is less, and the cost is low; the rolling body and the ferrule of the tapered roller bearing are in surface contact, so that the tapered roller bearing is larger in bearing and higher in rigidity, and the bearing is simpler in pre-tightening, pre-pressing and theoretical clearance during installation.

In summary, the shafting structure of the power head of the walking machine provided by the utility model comprises a power tool shaft and a box body for mounting the power tool shaft, wherein the box body is provided with a through hole for mounting the power tool shaft, one end of the power tool shaft is provided with an axial positioning step, the axial positioning step is welded on the box body, and the other end of the power tool shaft is fixed on the box body through a support seat in a threaded connection manner; the power tool shaft comprises a center shaft, and a gear assembly, a first bearing assembly, a second bearing assembly and a chuck assembly which are sequentially arranged on the center shaft. The tool shaft axial positioning device is simple in structure, adopts a through hole installation mode, avoids the problem of low installation precision of the traditional stepped hole, and meanwhile, the axial positioning step of the power tool shaft is fixed on the box body in a welding mode, so that the power tool shaft is ensured to be more accurate in installation and positioning, and the machining precision is ensured.

It should be understood that the technical solutions and the inventive concepts according to the present invention may be equally replaced or changed by those skilled in the art, and all such changes or substitutions should fall within the protection scope of the appended claims.

Claims

1. A shafting structure of a power head of a walking machine is characterized by comprising a power tool shaft and a box body for mounting the power tool shaft, wherein the box body is provided with a through hole for mounting the power tool shaft; the power tool shaft comprises a center shaft, and a gear assembly, a first bearing assembly, a second bearing assembly and a chuck assembly which are sequentially arranged on the center shaft.

2. The shafting structure of the walk heart quick-witted unit head of claim 1, characterized in that, the gear subassembly includes drive gear and the interior spacer sleeve of gear that is used for driving power cutter axle, drive gear sets up on the center pin through the connector key, the interior spacer sleeve of gear and axial positioning step are located on the center pin in proper order.

3. The shafting structure of the walk heart machine unit head of claim 2, characterized in that, the other side of drive gear is provided with round nut for spacing.

4. The shafting structure of the walk-center machine power head of claim 1, wherein the first bearing assembly comprises a first bearing, a bearing outer spacer sleeve and a bearing inner spacer sleeve, the first bearing and the bearing inner spacer sleeve are sleeved on the central shaft, the first bearing is arranged on one side of the bearing inner spacer sleeve, and the bearing outer spacer sleeve is sleeved on the outer side of the bearing inner spacer sleeve.

5. The shafting structure of the walk center machine unit head of claim 4, wherein the second bearing assembly comprises a second bearing and a first sealing member, the second bearing is sleeved on the center shaft and is arranged on the other side of the bearing inner spacer, and the supporting seat is connected with the center shaft through the first sealing member.

6. The shafting structure of the walk heart quick-witted unit head of claim 5, characterized in that, the first sealing member is two lip skeleton oil seals.

7. The shafting structure of the walk center machine power head of claim 2, wherein a second sealing member for sealing is sleeved on the outer side of the supporting seat, and the second sealing member is an O-shaped sealing ring.

8. A shafting arrangement for a walk-in machine power head according to claim 1, characterized in that the chuck assembly comprises a chuck, the chuck being secured to the end of a central shaft by means of a nut, the central shaft being provided with mounting holes for mounting the chuck.

9. The shafting structure of the walk center machine power head of claim 4, characterized in that the axial positioning step is connected with the box body by means of laser welding.

10. A shafting arrangement for a walk-in motor power head according to claim 5, characterized in that said first and second bearings are tapered roller bearings.