CN216780832U

CN216780832U - Coaxiality positioning device

Info

Publication number: CN216780832U
Application number: CN202123000712.8U
Authority: CN
Inventors: 张冲; 张宁; 李利军; 邓元岗; 许建梅
Original assignee: China Railway Baoji Bridge Group Co Ltd
Current assignee: China Railway Baoji Bridge Group Co Ltd
Priority date: 2021-12-01
Filing date: 2021-12-01
Publication date: 2022-06-21
Anticipated expiration: 2031-12-01

Abstract

The utility model discloses a coaxiality positioning device which comprises a positioning shaft, wherein two ends of the positioning shaft are respectively provided with a screw rod, the screw rods are movably arranged on the positioning shaft, can rotate and axially limit the movement of the screw rods; the screw rod is in threaded connection with a gland, a guide piece which limits the rotation of the gland and guides the gland to move along the axial direction of the positioning shaft is arranged between the gland and the positioning shaft, an expansion sleeve is sleeved on the positioning shaft and connected with the gland, and conical surfaces which can enable the expansion sleeve to expand and cling to the inner wall of the hole to be positioned are arranged on the expansion sleeve and/or the positioning shaft; because the gland is connected with the expansion sleeve, the expansion sleeve can be driven to move when the expansion sleeve is installed, and the expansion sleeve can be pulled out from the part through the gland when the positioning device is disassembled, so that the disassembly and the assembly are more rapid and convenient.

Description

Coaxiality positioning device

Technical Field

The utility model relates to the field of tools, in particular to a device for coaxiality positioning.

Background

The suspension type track beam is usually provided with the hole for hoist at both ends, suspends in midair through the round pin axle and installs on the stand, and the hole for hoist at track beam both ends has tolerance and axiality requirement. In the prior art, welding is generally carried out by integral processing after welding or by penetrating a positioning shaft. The rail beam belongs to a large structural member, the size is large, the weight is heavy, a large machine tool or a special machine tool is required to be adopted for integral processing, the transferring and clamping are extremely inconvenient, the processing efficiency is low, and the cost is high. Due to the large tolerance of the single diameter of the hoisting hole, the hoisting hole is usually formed by

The coaxiality requirement of the two holes is 0.5mm, the distance between the two hoisting holes is large, if a common positioning process shaft is adopted, the maximum positioning diameter of the positioning shaft can only be manufactured according to the lower deviation value of the holes, the holes have the deviation value of 0.4mm, the coaxiality of the two hoisting holes is difficult to guarantee by shaft penetration welding, and the process shaft is difficult to disassemble due to the fact that the welding deformation easily causes the clamping of the process shaft after welding. Patents 201420718112.6, 201420854342.5 and 202022018062.9 all disclose a tool for positioning hole coaxiality, in which coaxiality positioning is realized by expanding a spring sleeve, wherein patents 201420854342.5 and 202022018062.9 adopt thread fit tensioning to realize expanding the spring sleeve, and the error of coaxiality is large due to the error of the thread fit, and in the two technical schemes, the spring sleeve is still left in a part hole after the tool is removed and needs to be removed independently; although patent 201420718112.6 has avoided the error problem through screw-thread fit, has improved the axiality, the spring housing dismouting still needs appurtenance to demolish, and to the part of special pass some, appurtenance is unable practical moreover, and dismantling of spring housing has also become great problem.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems in the prior art, the utility model provides a positioning device which has high coaxiality positioning precision and is convenient to disassemble and assemble, and the technical scheme adopted by the utility model is as follows:

a coaxiality positioning device comprises a positioning shaft, wherein two ends of the positioning shaft are respectively provided with a screw rod, the screw rods are movably arranged on the positioning shaft and can rotate and axially limit the movement of the screw rods; the screw rod on threaded connection have a gland and location axle between be equipped with the rotatory guide that just guides the gland along location axle axial displacement of restriction gland location epaxial cover be equipped with the inflation cover, the inflation cover link together with the gland inflation cover and/or location epaxial be equipped with and enable the inflation cover expand to open and paste the toper face of tight downthehole wall of locating.

Furthermore, the screw rod is provided with a locking nut, and the end part of the screw rod is provided with a hexagonal head.

Furthermore, a threaded hole is formed in the end portion of the positioning shaft, a nut seat used for installing a screw is connected to the threaded hole in a threaded mode, and a unthreaded hole is formed in the nut seat.

Furthermore, the screw rod comprises a polished rod section and a threaded section, the polished rod section is arranged in the polished hole, the diameter of the threaded section is larger than that of the polished hole, and a limiting part for limiting the screw rod to be separated from the polished hole is arranged at one end, extending into the positioning shaft, of the screw rod.

Furthermore, a limiting surface is arranged at one end, close to the nut seat, in the positioning shaft, and a limiting part is arranged at one end, extending into the positioning shaft, of the screw rod.

Furthermore, the limiting part is a nut or a baffle.

Further, the guide member is a key groove and a key.

Furthermore, the expansion sleeve comprises a connecting flange and an expansion sheet, and the gland is connected with the connecting flange through a screw.

Furthermore, the connecting flange and the expansion sheet are at least provided with three combined sections and then are in a tubular shape, and the gland is provided with a group of waist-shaped holes for connecting the connecting flanges through screws.

Furthermore, the connecting flange is an integral body, and the expansion sheet is at least provided with three arc-shaped sheets which are combined to form a pipe shape.

According to the technical scheme, the expansion sleeve and the shaft are matched to expand to achieve hole aligning positioning, the gland is matched through threads, the gland only plays a role in driving the expansion sleeve to move, the expansion positioning process is achieved through the expansion sleeve and the positioning shaft in a sliding fit mode, positioning accuracy is improved, the gland and the expansion sleeve are connected, the expansion sleeve can be driven to move when the gland and the expansion sleeve are installed, the expansion sleeve can be pulled out of a part through the gland when the gland and the expansion sleeve are detached, and dismounting and mounting are more rapid and convenient.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an exploded view of the present invention;

FIG. 3 is a schematic diagram of a practical state of the present invention;

FIG. 4 is an enlarged view of a portion of FIG. 3 in accordance with the present invention;

FIG. 5 is a schematic view of the gland structure of the present invention;

FIG. 6 is a schematic structural view of embodiment 1 of the expansion shell of the present invention;

FIG. 7 is a schematic structural view of embodiment 2 of the expansion shell of the present invention;

FIG. 8 is a schematic view of the screw assembling structure of embodiment 1 of the present invention;

fig. 9 is a schematic view of a screw assembly structure according to embodiment 2 of the present invention.

Detailed Description

In order to clearly understand the technical solution of the present invention, the following detailed description is made with reference to the accompanying drawings and specific embodiments:

the coaxiality positioning device shown in fig. 1 and fig. 3 comprises a positioning shaft 1, two ends of the positioning shaft 1 are respectively provided with a screw rod 2, a gland 3 is connected on the screw rod 2 in a threaded manner, an expansion sleeve 5 is sleeved on the positioning shaft 1, the expansion sleeve 5 is connected with the gland 3, wherein the screw rod 2 can rotate at two ends of the positioning shaft 1 but is limited in the axial direction of the positioning shaft 1, the specific implementation mode is further detailed later, a guide part 4 is arranged between the gland 3 and the positioning shaft 1, the guide part 4 can adopt the matching mode of a key groove and a key shown in fig. 4, the gland 3 can be limited to rotate by the guide part 4, meanwhile, the gland 3 can linearly move along the axial direction of the positioning shaft 1 under the action of the guide part 4 when the screw rod 2 is rotated, because one end of the expansion sleeve 5 is connected with the gland 3, the expansion sleeve 5 can drive the expansion sleeve 5 to axially move along the positioning shaft 1 when the gland 3 moves, be equipped with conical surface 6 on inflation cover 5 or location axle 1, just can expand expansion deformation with inflation cover 5 through conical surface 6 when inflation cover 5 removes to make inflation cover 5 paste and take location part A hole inner wall, because all be equipped with inflation cover 5 at location axle 1 both ends, the inflation cover 5 at location axle 1 both ends is expanded the back and is fixed a position two holes, these two inflation covers 5 are located a location axle 1 together, make two inflation covers 5 keep the axiality, and then make the hole that inflation cover 5 was located have fine axiality. Treat that the work piece welding is accomplished and dismantle this positioner, because gland 3 links together with inflation cover 5, it can drive inflation cover 5 to withdraw from together to twist screw rod 2 and make gland 3 withdraw from, has avoided follow-up loaded down with trivial details step that still need to demolish inflation cover 5, and it is more troublesome to demolish inflation cover 5 through appurtenance moreover, because inflation cover 5 tensioning back is pressed from both sides tightly by location axle 1 and the hole of awaiting the location and is difficult to take out, consequently adopt this kind of structure to make things convenient for the installation and can demolish fast promptly, it is more convenient to use.

The expansion sleeve 5 shown in fig. 6 comprises a connecting flange 16 and a group of expansion pieces 17, wherein the connecting flange 16 is a complete circular ring, the expansion pieces 17 are arc-shaped pieces which are combined to form a circular tube shape, and only the expansion pieces 17 deform and expand during expansion.

The expansion sleeve 5 shown in fig. 7 is an improvement on the embodiment shown in fig. 6, the connecting flange 16 is also divided into a plurality of parts, each part corresponds to the expansion sheet 17, the connecting flange 16 and the expansion sheet 17 are in a tubular shape after combination, the connecting flange 16 can be expanded along with the deformation of the expansion sleeve 5 under the structure, and the connecting flange 16 needs to be connected with the gland 3 by screws, so that waist-shaped holes 18 are arranged on the gland 3 for connecting hole positions of the screws as shown in fig. 5, and the screws can move in the waist-shaped holes 18 when the expansion of the connecting flange 16 moves, thereby ensuring that the expansion sleeve 5 is always connected with the gland 3.

The installation mode of the screw 2 is to provide two embodiments, both of the two embodiments need to provide an internal thread at the end of the positioning shaft 1 and install the nut seat 10, so a threaded hole 9 is provided at the end of the positioning shaft 1 for installing the nut seat 10, an unthreaded hole 11 is provided in the nut seat 10, as shown in fig. 8, the screw 2 is provided with a threaded section 13 and a polished rod section 12, the polished rod section 12 is provided in the unthreaded hole 11, a limit part 14 (a baffle plate or a nut) is connected at one end of the screw 2 extending into the positioning shaft 1, when the nut is installed, the screw 2 needs to be locked by an opening pin, so the screw 2 cannot be separated from the nut seat 10, in the structure, because the positioning shaft 1 is tubular, in order to prevent the screw 2 from falling into the positioning shaft 1, the diameter of the threaded section 13 is larger than the diameter of the unthreaded hole 11, and thus the screw 2 is prevented from moving into the positioning shaft 1. In another implementation, as shown in fig. 9, the positioning shaft 1 is solid, and only one end of the screw rod 2 extending into the positioning shaft 1 needs to be connected with a limiting member 14 (a blocking piece or a nut), and when the screw rod 2 moves into the positioning shaft 1, the movement of the screw rod is limited by a limiting surface 15 in the positioning shaft 1 to be blocked. In the above two embodiments, a hexagonal head 8 (inner hexagonal head or outer hexagonal head) is provided on the screw 2, and the screw 2 is rotated in the nut seat 10 by screwing the screw 2, so that the gland 3 is driven to move axially along the positioning shaft 1.

In order to avoid looseness of the gland 3 after the expansion sleeve 5 is tightly pressed, a locking nut 7 is further arranged on the screw rod 2, and the gland 3 is locked by the locking nut 7 after the gland 3 is screwed in place.

Claims

1. A axiality positioner, includes location axle (1), its characterized in that: two ends of the positioning shaft (1) are respectively provided with a screw (2), the screw (2) is movably arranged on the positioning shaft (1) and can rotate and axially limit the movement of the screw (2); screw rod (2) on threaded connection have gland (3) and location axle (1) between be equipped with restriction gland (3) rotation and guide gland (3) along location axle (1) axial displacement's guide (4) location axle (1) on the cover be equipped with inflation cover (5), inflation cover (5) link together with gland (3) inflation cover (5) and/or location axle (1) on be equipped with and enable inflation cover (5) to expand to open and paste tight conical surface (6) of locating the downthehole wall.

2. A concentricity positioning apparatus as defined in claim 1, wherein: the screw rod (2) is provided with a locking nut (7), and the end part of the screw rod (2) is provided with a hexagonal head (8).

3. A coaxiality positioning device according to claim 1 or 2, wherein: the end part of the positioning shaft (1) is provided with a threaded hole (9), the threaded hole (9) is internally connected with a nut seat (10) for installing a screw rod (2), and the nut seat (10) is provided with a unthreaded hole (11).

4. A coaxiality positioning apparatus according to claim 3, wherein: the screw rod (2) include polished rod section (12) and screw thread section (13), polished rod section (12) section arrange in unthreaded hole (11), screw thread section (13) diameter be greater than unthreaded hole (11) diameter screw rod (2) stretch into the one end of location axle (1) install and restrict screw rod (2) and break away from locating part (14) of unthreaded hole (11).

5. A coaxiality positioning apparatus according to claim 3, wherein: a limiting surface (15) is arranged at one end, close to the nut seat (10), in the positioning shaft (1), and a limiting part (14) is arranged at one end, extending into the positioning shaft (1), of the screw rod (2).

6. A coaxiality positioning apparatus according to claim 4 or 5, wherein: the limiting piece (14) is a nut or a baffle.

7. A concentricity positioning apparatus as defined in claim 1, wherein: the guide piece (4) is a key groove and a key.

8. A concentricity positioning apparatus as defined in claim 1, wherein: the expansion sleeve (5) comprises a connecting flange (16) and an expansion sheet (17), and the gland (3) is connected with the connecting flange (16) through screws.

9. A concentricity positioning device as defined in claim 8, wherein: the connecting flange (16) and the expansion sheet (17) are at least provided with three combined parts and then are in a tubular shape, and the gland (3) is provided with a group of waist-shaped holes (18) for connecting the connecting flanges (16) through screws.

10. A concentricity positioning device as defined in claim 8, wherein: the connecting flange (16) is an integral body, and the expansion sheet (17) is at least provided with three arc sheets which are combined to be tubular.