Centering device for large-diameter shaft and mounting hole
阅读说明:本技术 大直径轴与安装孔的对中装置 (Centering device for large-diameter shaft and mounting hole ) 是由 赵俊 高益多 方强 于 2019-11-01 设计创作,主要内容包括:本发明公开了一种大直径轴与安装孔的对中装置,包括箱体、传动机构和顶撑杆同步移动机构,传动机构包括彼此啮合的1个大圆锥齿轮和4个小圆锥齿轮,大圆锥齿轮的转动轴中部通过大圆锥齿轮轴承支撑在箱体的顶板中心上,大圆锥齿轮的转动轴一端端头与顶尖一端固定连接。小圆锥齿轮分别位于箱体四周的侧板内,小圆锥齿轮一端通过小圆锥齿轮轴承分别支撑在箱体四侧的侧板中心上。顶撑杆同步移动机构的一端分别与小圆锥齿轮一端的轴管螺纹连接,顶撑杆支撑调节机构分别设置在顶撑杆同步移动机构的一端外。本发明缩短了装配工时,提高了大直径轴装配效率,且提高了大直径轴安装的安全性,有效地提高了装配效率。(The invention discloses a centering device for a large-diameter shaft and a mounting hole, which comprises a box body, a transmission mechanism and a top brace rod synchronous moving mechanism, wherein the transmission mechanism comprises 1 large bevel gear and 4 small bevel gears which are meshed with each other, the middle part of a rotating shaft of the large bevel gear is supported on the center of a top plate of the box body through a large bevel gear bearing, and one end of the rotating shaft of the large bevel gear is fixedly connected with one end of a top tip. The small bevel gears are respectively positioned in the side plates at the periphery of the box body, and one ends of the small bevel gears are respectively supported on the centers of the side plates at the four sides of the box body through small bevel gear bearings. One end of the top stay bar synchronous moving mechanism is respectively in threaded connection with the axle tube at one end of the small bevel gear, and the top stay bar supporting and adjusting mechanisms are respectively arranged outside one end of the top stay bar synchronous moving mechanism. The invention shortens the assembly time, improves the assembly efficiency of the large-diameter shaft, improves the installation safety of the large-diameter shaft and effectively improves the assembly efficiency.)
1. A centering device for a large-diameter shaft and a mounting hole is characterized by comprising a box body, a transmission mechanism and a jacking rod synchronous moving mechanism, wherein one side of the box body is open, the transmission mechanism comprises 1 large bevel gear and 4 small bevel gears, the center of the large bevel gear vertically extends upwards to form a rotating shaft penetrating out of a top plate, the middle part of the rotating shaft is supported on the center of the top plate of the box body through a large bevel gear bearing, one end of a crank is sleeved on a prism at one end of the rotating shaft, and one end of the rotating shaft is fixedly connected with one end of a jacking rod; the small bevel gears are respectively positioned in side plates at the periphery of the box body, one end of each small bevel gear extends out of a shaft tube with a threaded through hole in the center, the shaft tubes are respectively supported on the centers of the side plates at the periphery of the box body through small bevel gear bearings, and the large bevel gear is meshed with the 4 small bevel gears; one end of the top stay bar synchronous moving mechanism is respectively in threaded connection with the axle tube at one end of the small bevel gear, and the top stay bar supporting and adjusting mechanisms are respectively arranged outside one end of the top stay bar synchronous moving mechanism.
2. The centering device for the large-diameter shaft and the mounting hole according to claim 1, wherein the synchronous moving mechanism for the top supporting rod comprises a screw, a moving rod and the top supporting rod, an axial through hole is formed in the center of the screw, and the middle part of the top supporting rod is vertically and fixedly connected with one end of the moving rod; the other end of the movable rod extends into the axial through hole of the screw rod and is in clearance fit with the axial through hole; one end of each screw is screwed into the corresponding shaft tube at one end of the small bevel gear, and the other end of each screw radially extends out of the limiting convex shoulder; when the screw rods return to the limit position in the box body, one ends of the 4 screw rods are vertically intersected in a cross shape, and a limit convex shoulder at the other end of each screw rod abuts against the outer side of a side plate of the box body; the top stay bar supporting and adjusting mechanism is arranged on the outer side of the other end of the screw rod.
3. The centering device for the large-diameter shaft and the mounting hole as claimed in claim 2, wherein the screw is provided at an outer side thereof with a through-long guide groove, one end of the guide key is fixed to an outer side of the side plate of the corresponding housing, respectively, and the other end of the guide key is fitted into the guide groove.
4. The centering device for large-diameter shaft and mounting hole of claim 1, wherein said top stay has a semicircular cross section; and the straightness tolerance of the top stay bar and the verticality tolerance of the top stay bar and the movable bar are all 0.02 mm.
5. The centering device for the large-diameter shaft and the mounting hole according to claim 2, wherein the supporting and adjusting mechanism for the top supporting rod comprises a cover plate, a locking pin, a compression spring, a pull ring and a plurality of locking pin holes arranged at intervals on the moving rod, the other end of the screw rod is provided with a stepped transverse hole, one end of the locking pin is inserted into the stepped transverse hole, and the one end of the locking pin extends into the locking pin hole at the corresponding position on the moving rod to lock the moving rod at the required extending length; one end of the pressure spring is abutted against a radial boss in the middle of the locking pin, the other end of the pressure spring is abutted against the inner side face of the cover plate, the cover plate is fixed on the outer side face of the other end of the screw rod, and the pull ring is hinged with the other end of the locking pin.
6. The centering device for the large-diameter shaft and the mounting hole according to claim 2, wherein the end of the screw rod is conical, and the cone apex angle of the cone is 90 °; when the 4 screws are retracted to the limit position in the box body, the conical tops of the cones at one ends of the 4 screws abut against each other.
7. The centering device for the large-diameter shaft and the mounting hole according to claim 1, wherein the intersection of the side plates around the box body is a round angle.
Technical Field
The invention relates to an assembly tool for a shaft and a hole, in particular to a centering device for a large-diameter shaft and a hole with the diameter of more than 150mm and the assembly precision of not more than 0.05mm, and belongs to the technical field of fitter assembly tools.
Background
In the assembly of mechanical devices or components, the assembly of shafts and bores is most common. In the assembly of a shaft and a hole of a small-sized device or a small-sized component, a small-diameter shaft with a light weight can be directly installed in the installation hole by a fitter with bare hands. The assembly of a large-diameter shaft with the diameter of more than 150mm and a mounting hole is generally assisted by a lifting appliance and a lifting platform. When the large-diameter shaft with high assembly precision requirement is installed in the mounting hole, the centering point of the shaft center of the large-diameter shaft and the shaft center of the mounting hole is often difficult to find by naked eyes of an operator, and the assembly efficiency is seriously influenced.
Disclosure of Invention
The invention aims to provide a centering device for a large-diameter shaft and a mounting hole, which is simple in structure and convenient to use, reduces labor intensity and improves assembly efficiency.
The invention is realized by the following technical scheme:
a centering device for a large-diameter shaft and a mounting hole comprises a box body, a transmission mechanism and a top support rod synchronous moving mechanism, wherein one side of the box body is open, the transmission mechanism comprises 1 large bevel gear and 4 small bevel gears, the center of the large bevel gear vertically extends upwards to form a rotating shaft penetrating out of a top plate, the middle part of the rotating shaft is supported on the center of the top plate of the box body through a large bevel gear bearing, one end of a crank is sleeved on a prism at one end of the rotating shaft, and one end of the rotating shaft is fixedly connected with one end of a top; the small bevel gears are respectively positioned in side plates at the periphery of the box body, one end of each small bevel gear extends out of a shaft tube with a threaded through hole in the center, the shaft tubes are respectively supported on the centers of the side plates at the four sides of the box body through small bevel gear bearings, and the large bevel gear is meshed with the 4 small bevel gears; one end of the top stay bar synchronous moving mechanism is respectively in threaded connection with the axle tube at one end of the small bevel gear, and the top stay bar supporting and adjusting mechanisms are respectively arranged outside one end of the top stay bar synchronous moving mechanism.
The object of the invention is further achieved by the following technical measures.
Furthermore, the top support rod synchronous moving mechanism comprises a screw rod, a moving rod and a top support rod, an axial through hole is formed in the center of the screw rod, and the middle of the top support rod is vertically and fixedly connected with one end of the moving rod; the other end of the movable rod extends into the axial through hole of the screw rod and is in clearance fit with the axial through hole; one end of each screw is screwed into the corresponding shaft tube at one end of the small bevel gear, and the other end of each screw radially extends out of the limiting convex shoulder; when the screw rods return to the limit position in the box body, one ends of the 4 screw rods are vertically intersected in a cross shape, and a limit convex shoulder at the other end of each screw rod abuts against the outer side of a side plate of the box body; the top stay bar supporting and adjusting mechanism is arranged on the outer side of the other end of the screw rod.
Furthermore, the outer side of the screw rod is provided with a through long guide groove, one end of each guide key is fixed on the outer side of the corresponding side plate of the box body, and the end head of the other end of each guide key is embedded into the guide groove.
Further, the cross section of the top supporting rod is semicircular; and the straightness tolerance of the top stay bar and the verticality tolerance of the top stay bar and the movable bar are all 0.02 mm.
Furthermore, the top support rod supporting and adjusting mechanism comprises a cover plate, a locking pin, a pressure spring, a pull ring and a plurality of locking pin holes which are arranged at intervals on the moving rod, a step transverse hole is formed in the end head of the other end of the screw rod, one end of the locking pin is inserted into the step transverse hole, and the end head of one end of the locking pin extends into the locking pin hole in the corresponding position on the moving rod to lock the moving rod at the required extending length; one end of the pressure spring is abutted against a radial boss in the middle of the locking pin, the other end of the pressure spring is abutted against the inner side face of the cover plate, the cover plate is fixed on the outer side face of the other end of the screw rod, and the pull ring is hinged with the other end of the locking pin.
Furthermore, the end of one end of the screw rod is conical, and the cone vertex angle of the cone is 90 degrees; when the 4 screws are retracted to the limit position in the box body, the conical tops of the cones at one ends of the 4 screws abut against each other.
Furthermore, the intersection of the side plates around the box body is a fillet.
The invention has simple structure and convenient alignment of the large-diameter shaft and the mounting hole, and adopts a structure that 1 large bevel gear on the inner side of the top plate of the box body is simultaneously meshed with 4 small bevel gears on the inner sides of the peripheral side plates. When the crank is rotated to drive the large bevel gear to rotate, the corresponding screw rods in the small bevel gears are pushed to synchronously extend outwards through the equidirectional rotation of the 4 small bevel gears meshed with the large bevel gear at the same time until the 4 supporting rods firmly support the inner wall of the mounting hole, and the tip of the tip points indicate the axis of the mounting hole. Therefore, the axis direction of the large-diameter shaft hung by the hanger can be adjusted, the center hole of the end face of the lower end of the large-diameter shaft is aligned to the tip of the tip, and the large-diameter shaft can be conveniently installed in the installation hole. The invention shortens the assembly time, improves the assembly efficiency of the large-diameter shaft, improves the installation safety of the large-diameter shaft and effectively improves the assembly efficiency. The invention can adjust the extension length of the moving rod according to the different diameters of the mounting hole, and can be made into different sizes to meet the mounting requirements of large-diameter shafts matched with different hole diameters, thereby improving the universality of the invention.
Advantages and features of the present invention will be illustrated and explained by the following non-restrictive description of preferred embodiments thereof, given by way of example only with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic representation of the use of the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
fig. 3 is an enlarged view of a portion i of fig. 2.
Detailed Description
The invention is further illustrated by the following figures and examples.
As shown in fig. 1 to 3, the present embodiment includes a
One end of the top stay
The other end of the
As shown in fig. 3, the stay
The using process of the invention is as follows:
the extension length of the 4 moving
In addition to the above embodiments, the present invention may have other embodiments, and any technical solutions formed by equivalent substitutions or equivalent transformations fall within the scope of the claims of the present invention.
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