CN210500064U

CN210500064U - Oscillating stepless rack locking device

Info

Publication number: CN210500064U
Application number: CN201921475301.4U
Authority: CN
Inventors: 雷超; 贾楠; 解吉辉; 刘录锋; 孙丽丽; 杨晓东
Original assignee: China National Heavy Machinery Research Institute Co Ltd
Current assignee: China National Heavy Machinery Research Institute Co Ltd
Priority date: 2019-09-06
Filing date: 2019-09-06
Publication date: 2020-05-12
Anticipated expiration: 2029-09-06

Abstract

A swing type stepless rack locking device comprises an oil cylinder base, wherein the oil cylinder base is connected with a swing oil cylinder through a hinge shaft, the piston end of the swing oil cylinder is connected with the top end of a swing arm through a first pin shaft, one end of the bottom of the swing arm is hinged with a second pin shaft, and the other end of the bottom of the swing arm is connected with a stop oil cylinder through an oil cylinder mounting base; a slide way is arranged at the bottom of the swing arm, one end, close to the second pin shaft, in the slide way is connected with one end of a spring, and a first rack is arranged in the slide way and at the other end of the spring; a second rack is arranged below the first rack; the device drives the swing arm to swing through the oil cylinder, the first rack slides linearly in the slideway and is meshed with the second rack, so that the gear rack transmission mechanism is reliably locked at any position, and displacement can not occur under the condition of bearing large impact load; the utility model has the advantages of simple use, stepless locking, reliable locking, no need of manual intervention and the like.

Description

Oscillating stepless rack locking device

Technical Field

The utility model relates to a locking device especially relates to a stepless rack locking device of oscillating.

Background

At present, the fixed-length baffle plates for fixed length of the steel tubes in rows in the steel tube gang saw equipment at home and abroad are driven by a gear and a rack, and two locking modes mainly exist at present: one is to adopt a plurality of groups of oil cylinders to press the guide rail surface, and realize locking by establishing strong friction with the guide rail surface; the other is to lock the rack and the gear by locking the rotating shaft of the driving gear through the face gear, and the locking mode cannot realize stepless locking because of the meshing requirement of the face gear. But because at the scale in-process, the in bank steel pipe is high-speed striking scale baffle and stops realizing the scale, therefore the impact that the scale baffle received is very serious, and reliable locking can not be realized to above locking mode, appears the scale baffle and is bumped the problem that removes and locking face gear often damages.

Disclosure of Invention

In order to overcome the defects of the prior art, the utility model aims to provide a swing type stepless rack locking device, which can not generate displacement under the condition of bearing large impact load, has the advantages of simple structure, stepless locking, reliable locking, simple operation and no need of manual intervention.

In order to realize the purpose, the utility model discloses a technical scheme be:

a swing type stepless rack locking device comprises a moving part and a fixed part, wherein the moving part comprises an oil cylinder seat 1, the oil cylinder seat 1 is connected with the middle section of a swing oil cylinder 2 through a hinge shaft 12, the piston end of the swing oil cylinder 2 is connected with the top end of a swing arm 6 through a first pin shaft 3, one end of the bottom of the swing arm 6 is hinged with a second pin shaft 4, and the other end of the bottom of the swing arm 6 is connected with a stop oil cylinder 10 through an oil cylinder mounting seat 9; a slide way 7 is arranged at the bottom of the swing arm 6, one end, close to the second pin shaft 4, in the slide way 7 is connected with one end of a spring 5, and a first rack 8 is arranged in the slide way 7 and at the other end of the spring 5; the fixing component is a second rack 11 which is arranged below the first rack 8 and is matched with the first rack 8.

And a displacement sensor is arranged on the swing oil cylinder 2.

The swing oil cylinder 2 and the stop oil cylinder 10 are hydraulic oil cylinders.

The second rack 11 is fixedly mounted on the intrinsic part.

The utility model drives the swing arm 6 to swing around the second pin shaft 4 by the piston expansion on the swing oil cylinder 2 to lock and release the rack; the first rack 8 is driven by the piston of the stopping oil cylinder 10 to freely move in the slideway 7 and is meshed with the rack 11, a moving part does not need to move to the tooth width position of the rack, stepless locking of the gear rack mechanism is realized, a plurality of meshed surfaces of the rack are meshed, no gap exists between the meshed surfaces, and therefore the locking mechanism is good in stress condition and reliable in locking; the spring 5 is arranged, so that the first rack 8 is self-reset before locking, and meanwhile, the buffer function can be realized when a hydraulic system fails, and the safety of the first rack 8 and equipment is protected; whether the moving part is locked or not can be automatically judged by means of an external program through the numerical value read by the displacement sensor on the swing oil cylinder 2, so that the locking function is automated; the utility model discloses not only can be used to the locking of the scale mechanism of bank of tubes saw, also can be used to other rack and pinion actuating mechanism's that bear great load locking, have simple structure, stepless locking, locking is reliable, easy operation need not artificial intervention's advantage.

Drawings

Fig. 1 is a schematic diagram of the lifting state structure of the present invention.

Fig. 2 is a schematic diagram of the structure of the locking state of the present invention.

In the figure: 1. a cylinder block; 2. a swing oil cylinder; 3. a first pin shaft; 4. a second pin shaft; 5. a spring; 6. a swing arm; 7. a slideway; 8. a first rack; 9. an oil cylinder mounting base; 10. a stopping oil cylinder; 11. a second rack; 12. and (4) a hinge shaft.

Detailed Description

The structure principle and the working principle of the present invention are further explained below with reference to the accompanying drawings:

referring to fig. 1 and 2, the swing type stepless rack locking device comprises a moving part and a fixed part, wherein the moving part comprises an oil cylinder base 1, the oil cylinder base 1 is connected with the middle section of a swing oil cylinder 2 through a hinge shaft 12, the piston end of the swing oil cylinder 2 is connected with the top end of a swing arm 6 through a first pin shaft 3, one end of the bottom of the swing arm 6 is hinged with a second pin shaft 4, and the other end of the bottom of the swing arm 6 is connected with a stop oil cylinder 10 through an oil cylinder mounting base 9; a slide way 7 is arranged at the bottom of the swing arm 6, one end, close to the second pin shaft 4, in the slide way 7 is connected with one end of a spring 5, and a first rack 8 is arranged in the slide way 7 and at the other end of the spring 5; the fixed part is a second rack 11 which is arranged below the first rack 8 and is matched with the first rack 8, and the second rack 11 is fixedly arranged on the inherent part.

And a displacement sensor is arranged on the swing oil cylinder 2.

The utility model discloses a theory of operation does:

when the moving part needs to move, the piston of the swing oil cylinder 2 with the displacement sensor retracts to drive the swing arm 6 to lift so that the first rack 8 is separated from the second rack 11, a stop valve on a hydraulic circuit of the stop oil cylinder 10 is opened so that the first rack 8 can move freely, the stop valve returns to the initial position under the action of the spring 5, and the moving part can move normally so as to automatically align the locking position.

When the moving part moves to a position and needs to be locked, the swing oil cylinder 2 with the displacement sensor extends out and drives the swing arm 6 to swing down, and when the first rack 8 is in contact with the second rack 11, the following two conditions can be divided:

1) when the teeth of the first rack 8 and the second rack 11 are at the biting position, the teeth are automatically aligned with the second rack 11 and meshed to the right position under the pressure of the swing cylinder 2 with the displacement sensor, and at the moment, the displacement of the swing cylinder 2 with the displacement sensor is read out and used as the basis for locking the racks to the right position, so that the teeth can be used for locking at other positions. After the first rack 8 and the second rack 11 are meshed in place, a stop valve on a hydraulic circuit of the stopping oil cylinder 10 is closed, the stopping oil cylinder is locked, and the first rack 8 cannot move, so that a locking effect is achieved.

2) When the first rack 8 and the second rack 11 are at the position of the tooth top teeth, the swing arm 6 cannot move continuously under the pressure of the swing oil cylinder 2 with the displacement sensor to be meshed with the second rack 11, and the value of the swing oil cylinder 2 with the displacement sensor is read and is used as a basis for judging the situation; under the condition, a reversing valve on a hydraulic circuit of a stopping oil cylinder 10 is communicated, the hydraulic circuit drives the stopping oil cylinder 10 to extend out, a locking rack 8 is driven to move towards a hinge shaft side, at the moment, the reading value of a swing oil cylinder 2 with a displacement sensor is gradually increased, when a first rack 8 enters a position meshed with a second rack under the driving of the stopping oil cylinder 10, the reading value of the swing oil cylinder 2 with the displacement sensor is suddenly reduced, at the moment, the reversing valve on the hydraulic circuit of the stopping oil cylinder 10 is closed, a stop valve on the hydraulic circuit is opened, a moving part is switched to a free moving state, the first rack 8 is automatically aligned, and after the first rack 8 is meshed with the second rack 11 in place under the pressure of the swing oil cylinder 2 with the displacement sensor, the stop valve on the hydraulic circuit is closed, the stopping oil cylinder is locked, the first rack 8 cannot move, and the locking effect is.

The impact force of the steel pipe is finally transmitted to the second rack 11 through the meshing of the second pin shaft 4, the swing arm 6, the stop oil cylinder 10, the first rack 8 and the second rack 11, after the stop oil cylinder 10 is completely locked, the moving part cannot move, and the whole stress chain can be regarded as a rigid body, so that the mechanism is well stressed, and the problem of position deviation after being impacted can not occur. The utility model discloses not only can be used to the locking of the scale mechanism of bank of tubes saw, also can be used to other rack and pinion actuating mechanism's that bear great load locking.

Obviously, the embodiments in the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those skilled in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is intended to be covered by the claims.

Claims

1. The utility model provides a dynamic formula stepless rack locking device, comprises moving part and fixed part two parts, and wherein the moving part includes hydro-cylinder seat (1), its characterized in that: the oil cylinder seat (1) is connected with the middle section of the swing oil cylinder (2) through a hinge shaft (12), the piston end of the swing oil cylinder (2) is connected with the top end of a swing arm (6) through a first pin shaft (3), one end of the bottom of the swing arm (6) is hinged with a second pin shaft (4), and the other end of the bottom of the swing arm (6) is connected with a stop oil cylinder (10) through an oil cylinder mounting seat (9); a slide way (7) is arranged at the bottom of the swing arm (6), one end, close to the second pin shaft (4), in the slide way (7) is connected with one end of a spring (5), and a first rack (8) is arranged in the slide way (7) and at the other end of the spring (5); the fixing part is a second rack (11) which is arranged below the first rack (8) and is matched with the first rack (8).

2. A dynamic stepless rack locking device according to claim 1, characterized in that: and a displacement sensor is arranged on the swing oil cylinder (2).

3. A dynamic stepless rack locking device according to claim 1, characterized in that: the swing oil cylinder (2) and the stop oil cylinder (10) are hydraulic oil cylinders.

4. A dynamic stepless rack locking device according to claim 1, characterized in that: the second rack (11) is fixedly arranged on the inherent part.