CN219521164U

CN219521164U - Automatic assembling tool for stern

Info

Publication number: CN219521164U
Application number: CN202223317698.9U
Authority: CN
Inventors: 徐宇航; 陈晓红; 王亮; 谢正斌; 于贺男; 张丽丽; 满立宝; 任作伟
Original assignee: State-Owned No123 Factory
Current assignee: State-Owned No123 Factory
Priority date: 2022-12-08
Filing date: 2022-12-08
Publication date: 2023-08-15
Anticipated expiration: 2032-12-08

Abstract

The utility model provides a stern automatic assembly tool which comprises a speed reducing mechanism, a direction changing mechanism, a follow-up mechanism, an overload clutch, a stern clamping mechanism and an elastomer clamping mechanism, wherein when the stern is assembled, the stern can rotate along the forward and reverse directions along a chuck in the stern clamping mechanism around a main shaft in the direction changing mechanism and can move left and right along the axis of the main shaft, and the moving distance is determined by the lengths of guide grooves on the follow-up mechanism and the overload clutch, and the lengths of the guide grooves are larger than the lengths of external threads at the front end of the stern. The compression moment can be controlled by changing the compression degree of the adjusting spring in the follow-up mechanism and the overload clutch, and when the moment reaches 500N.m, the follow-up mechanism is separated from the claw parts of the driving clutch claw and the driven clutch claw in the overload clutch, and the stern clamped in the chuck stops rotating, so that the safety protection function is realized.

Description

Automatic assembling tool for stern

Technical Field

The utility model belongs to the technical field of ammunition assembly, and particularly relates to a stern automatic assembly tool.

Background

The stern that uses at present is selected to make with aluminum alloy material, and its structure is as shown in figure 1, and the stern head is processed to have the external screw thread that diameter is 158 millimeters, and the stern passes through external screw thread and the assembly of body afterbody. The existing assembly method is to fix the projectile body on the platform, manually rotate a torque wrench and assemble the stern on the projectile body, but the method is time-consuming and labor-consuming and has unstable assembly quality.

Disclosure of Invention

First, the technical problem to be solved

The utility model provides an automatic stern assembly fixture, which aims to solve the technical problem of how to improve assembly efficiency and assembly quality.

(II) technical scheme

In order to solve the technical problems, the utility model provides a stern automatic assembly fixture which comprises a speed reducing mechanism, a steering mechanism, a follow-up mechanism, an overload clutch, a stern clamping mechanism and an elastomer clamping mechanism; the speed reducing mechanism comprises a motor, a first belt pulley, a second belt pulley, a first worm shaft, a worm wheel, a second worm wheel shaft, a third belt pulley, a fourth belt pulley, a second belt and a third belt, the steering mechanism comprises a main shaft, a fifth belt pulley, a mechanical clutch, a key and a sixth belt pulley, the follow-up mechanism and the overload clutch comprise an active clutch claw, a passive clutch claw, a spring, an adjusting nut, a guide screw and a follow-up sleeve, and the stern clamping mechanism comprises a chuck receiving disc, a chuck and a claw; the projectile body clamping mechanism comprises a positioning block;

the motor in the speed reducing mechanism drives the first belt pulley to rotate, the first belt pulley drives the second belt pulley through the first belt, and the speed reduction is realized by utilizing the different sizes of the first belt pulley and the second belt pulley; the second belt pulley drives the first worm shaft to rotate through key connection, and the first worm shaft drives the worm wheel to rotate; two ends of a worm wheel shaft serving as a worm wheel output part are provided with a third belt pulley and a fourth belt pulley which are different in size;

two ends of a main shaft in the direction changing mechanism are respectively fixed on the workbench through bearings, and a fifth belt pulley and a sixth belt pulley are arranged on the main shaft and are respectively positioned at the inner sides of the left bearing and the right bearing; the third belt pulley and the fourth belt pulley are respectively connected with the fifth belt pulley and the sixth belt pulley through a third belt and a second belt; the mechanical clutch is sleeved on the main shaft and can slide left and right on the main shaft along a key embedded on the main shaft; when the mechanical clutch is combined with the fifth belt pulley or the sixth belt pulley, the two rotating speeds can be obtained respectively; the spindle can rotate in two different directions through forward and reverse rotation of the motor;

the follower mechanism and the overload clutch are arranged on the outer side of the right bearing; the driving clutch claw and the driven clutch claw are sequentially arranged on the main shaft from inside to outside and are connected through the end surface claw parts; the spring is arranged in the inner cylinder of the passive clutch claw, the cylinder opening is provided with an adjusting nut, the adjusting nut is arranged on the right end screw thread of the main shaft, and the spring can be compressed by rotating the adjusting nut to compress the claw parts of the passive clutch claw and the active clutch claw; the driven sleeve is provided with a guide groove and sleeved on the outer surface of the driven clutch claw, a guide screw penetrates the guide groove and is screwed into a threaded hole on the outer surface of the driven clutch claw, and the driven sleeve can move along the direction of the guide groove relative to the driven clutch claw; the right end of the follow-up sleeve is provided with a chuck-receiving disc connecting part;

the center position of the chuck receiving disc of the stern clamping mechanism is connected with the chuck receiving disc connecting part of the follow-up sleeve through a connecting key; the chuck is arranged at the right end of the chuck receiving disc through a screw, the right end of the chuck is provided with a plurality of clamping jaws, and the clamping jaws can move radially along the chuck to clamp the stern;

the positioning block of the projectile body clamping mechanism is fixed on the workbench through a screw and used for supporting and positioning the projectile body, so that the projectile body and the stern can be positioned on the same axis during assembly.

Further, the speed reducing mechanism is arranged at the lower part of the workbench, and the turning mechanism is arranged at the upper part of the workbench.

Further, the transmission ratio of the first worm shaft to the worm wheel is 1:20.

Further, the fourth pulley is larger than the third pulley.

Further, the cowhide pad is bound to the jaws by gluing or wire.

Further, the length of the guide groove on the follow-up sleeve is longer than the external thread length at the front end of the stern.

(III) beneficial effects

Drawings

FIG. 1 is a schematic view of a stern structure;

FIG. 2 is a schematic view of a stern automatic assembly tooling structure according to an embodiment of the present utility model;

fig. 3 is a working schematic diagram of a stern automatic assembly fixture according to an embodiment of the present utility model.

Detailed Description

To make the objects, contents and advantages of the present utility model more apparent, the following detailed description of the present utility model will be given with reference to the accompanying drawings and examples.

The embodiment provides a stern automatic assembly fixture, the structure and the working principle of which are respectively shown in fig. 2 and 3, and the assembly fixture mainly comprises a speed reducing mechanism, a direction changing mechanism, a follower mechanism, an overload clutch 16, a stern clamping mechanism and an elastomer clamping mechanism.

The speed reducing mechanism is disposed at the lower portion of the table 31 and mainly includes a motor 1, a first pulley 2, a first belt 3, a second pulley 4, a first worm shaft 5, a worm wheel 6, a second worm wheel shaft 7, a third pulley 8, a fourth pulley 9, a second belt 10, and a third belt 11. The direction changing mechanism is provided at the upper portion of the table 31 and mainly includes a main shaft 12, a fifth pulley 13, a mechanical clutch 14, a key 15, and a sixth pulley 17. The follower and overload clutch 16 basically includes an active clutch pawl 18, a passive clutch pawl 19, a spring 20, an adjustment nut 21, a guide screw 30 and a follower sleeve 22. The stern clamping mechanism mainly comprises a chuck receiving plate 23, a chuck 24, a claw 25 and a cowhide pad 26. The projectile body retaining mechanism basically includes a positioning block 29.

The motor 1 in the speed reducing mechanism drives the first belt pulley 2 to rotate, the first belt pulley 2 drives the second belt pulley 4 through the first belt 3, and the 1:3 speed reduction is realized by utilizing the sizes of the first belt pulley 2 and the second belt pulley 4; the second belt pulley 4 drives the first worm shaft 5 to rotate through key connection, and the first worm shaft 5 drives the worm wheel 6 to rotate. The transmission ratio of the first worm shaft 5 to the worm wheel 6 is 1:20. A worm wheel shaft 7 as an output portion of the worm wheel 6 is provided at both ends with two third pulleys 8 and fourth pulleys 9 of different sizes (the fourth pulley 9 is larger than the third pulley 8).

Two ends of a main shaft 12 in the direction changing mechanism are respectively fixed on a workbench 31 through bearings, and a fifth belt pulley 13 and a sixth belt pulley 17 are arranged on the main shaft 12 and are respectively positioned at the inner sides of the left bearing and the right bearing. The third pulley 8 and the fourth pulley 9 are connected to the fifth pulley 13 and the sixth pulley 17 of the direction changing mechanism by a third belt 11 and a second belt 10, respectively. The mechanical clutch 14 is fitted over the spindle 12, and is capable of sliding left and right on the spindle 12 along a key 15 fitted to the spindle 12. The mechanical clutch 14 can obtain two rotational speeds when coupled to the fifth pulley 13 or the sixth pulley 17, respectively. The quick-tightening device is used for quickly tightening the stern threads, and the slow-tightening device is large in torque and used for loosening the stern threads. The spindle 12 can be rotated in two different directions by the forward and reverse rotation of the motor 1.

The follower and overload clutch 16 is disposed outboard of the right bearing. Wherein, the driving clutch claw 18 and the driven clutch claw 19 are sequentially arranged on the main shaft 12 from inside to outside and are connected through end surface claw parts. The spring 20 is installed in the inner cylinder of the passive clutch claw 19, an adjusting nut 21 is arranged at the cylinder opening, the adjusting nut 21 is installed on the right end thread of the main shaft 12, and the spring 20 can be compressed by rotating the adjusting nut 21, so that the claw parts of the passive clutch claw 19 and the active clutch claw 18 are compressed. The follower sleeve 22 is sleeved on the outer surface of the driven clutch claw 19, a guide groove is formed in the follower sleeve 22, and a guide screw 30 penetrates through the guide groove and is screwed into a threaded hole on the outer surface of the driven clutch claw 19. The follower sleeve 22 is movable in the direction of the guide groove relative to the driven clutch pawl 19. The right end of the follower sleeve 22 is provided with a chuck hub connection.

The center position of the chuck receiving plate 23 of the stern clamping mechanism is connected with the chuck receiving plate connecting part of the follow-up sleeve 22 through a connecting key. The chuck 24 is installed at the right end of the chuck receiving plate 23 through a screw, a plurality of clamping claws 25 are installed at the right end of the chuck 24, and a cowhide cushion 26 is bound on the clamping claws 25 through gluing or iron wires for protecting the clamped stern 27 from being blocked, and the clamping claws 25 can move radially along the chuck 24 to clamp the stern 27.

The positioning block 29 of the projectile body clamping mechanism is fixed on the workbench 31 through screws and is used for supporting and positioning the projectile body 28, so that the projectile body 28 and the stern 27 can be located on the same axis.

When the stern assembly is carried out, the stern 27 can rotate along the forward and backward directions of the chuck 24 around the main shaft 12 and can move left and right along the axis of the main shaft 12, the moving distance is determined by the length of a guide groove on the follower sleeve 22, and the length of the guide groove is larger than the length of the external screw thread at the front end of the stern 27. The compression moment can be controlled by changing the compression degree of the adjusting spring 20, when the moment reaches 500N.m, the claw parts of the driving clutch claw 18 and the driven clutch claw 19 are separated, and the stern 27 clamped in the chuck 24 stops rotating, so that a safety protection effect is realized.

The technical parameters and design requirements in the implementation are as follows: stern thread length 28 mm, 12 knots/inch, pitch = 25.4/12 = 2.117, thread length internal knots = 28/2.117 = 13 knots, maximum torque 500n.m. For the assembly requirements, the automatic stern assembly tool provided by the utility model can complete assembly in 16 seconds when the rotating speed of the main shaft 12 is set to 48 revolutions per minute.

The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that modifications and variations could be made by those skilled in the art without departing from the technical principles of the present utility model, and such modifications and variations should also be regarded as being within the scope of the utility model.

Claims

1. The automatic stern assembly fixture is characterized by comprising a speed reducing mechanism, a steering mechanism, a follow-up mechanism, an overload clutch, a stern clamping mechanism and an elastomer clamping mechanism; the speed reducing mechanism comprises a motor, a first belt pulley, a second belt pulley, a first worm shaft, a worm wheel, a second worm wheel shaft, a third belt pulley, a fourth belt pulley, a second belt and a third belt, the steering mechanism comprises a main shaft, a fifth belt pulley, a mechanical clutch, a key and a sixth belt pulley, the follow-up mechanism and the overload clutch comprise an active clutch claw, a passive clutch claw, a spring, an adjusting nut, a guide screw and a follow-up sleeve, and the stern clamping mechanism comprises a chuck receiving disc, a chuck and a claw; the projectile body clamping mechanism comprises a positioning block;

the positioning block of the projectile body clamping mechanism is fixed on the workbench through screws and used for supporting and positioning the projectile body, so that the projectile body and the stern can be positioned on the same axis during assembly.

2. The stern automatic assembly fixture of claim 1 wherein the speed reducing mechanism is disposed at a lower portion of the work table and the direction changing mechanism is disposed at an upper portion of the work table.

3. The stern automatic assembly fixture of claim 1 wherein the first worm shaft to worm gear ratio is 1:20.

4. The stern automatic assembly fixture of claim 1 wherein the fourth pulley is larger than the third pulley.

5. The stern automatic assembly fixture of claim 1 wherein the cowhide mat is bound to the jaws by gluing or wire.

6. The stern automatic assembly fixture of claim 1 wherein the length of the guide slot in the follower sleeve is greater than the length of the external screw thread at the front end of the stern.