CN205446432U - Rack and pinion cylinder - Google Patents

Abstract

The utility model relates to a rack and pinion cylinder, including end cover, pivot and retaining ring, the pivot is rotated and is installed on the end cover, and the retaining ring is established with the pivot card and is connected, still includes the bearing, and the bearing housing is established the pivot outside on the periphery, the lower surface of bearing and end cover contact, and the upper surface and the retaining ring of bearing contact. The utility model discloses use thrust bearing to bear the dead weight of pivot itself, power that the back pivot of ventilating in addition moved down and produces guarantees that the cylinder pivot can not take place drunkenness phenomenon from top to bottom. When the cylinder axle carries out the pivoted, can also overcome the main shaft wearing and tearing, add the protection safety cover, the counter shaft front end is protected, prevents that dust and foul from getting into, avoids the pivot at the bite that rotates the in -process.

Description

Rack-and-pinion cylinder

Technical field

This utility model relates to cylinder technical field, especially relates to a kind of rack-and-pinion cylinder.

Background technology

Traditional rack-and-pinion cylinder bore 700mm, cylinder length 1500mm, volume is bigger, heavier-weight, because of endoporus and rotating shaft serious wear, cylinder remarkable action before and after cylinder block, cylinder cannot use, and when keeping in repair cylinder, because of the reason of volume, weight and structure, keep in repair to need every time and could repair for about 10 days, every cylinder the most all needs to keep in repair more than 2 times, need numerical control borer to coordinate processing, extend maintenance cycle, add work difficulty.Rotating shaft in rack-and-pinion cylinder there is the following problem: 1. the thrust after the gravity of rotating shaft itself and cylinder ventilation all acts on jump ring, causes the abrasion of jump ring and axle to accelerate.The nose wear of cylinder axis is serious every time, should be the reason of axle abrasion, dismantles cylinder, and countershaft front end carries out repair welding processing, and processing time consuming is laborious, installs the most very time-consuming, laborious.2. rotating shaft front end does not has preventer, causes dust or dirty entrance, easily causes axle bite in rotation process, and once rotating shaft is killed with upper and lower side endoporus or weares and teares, and follow-up maintenance work is brought very big inconvenience and adds maintenance cycle.

Utility model content

The technical problems to be solved in the utility model is: the thrust after the gravity and cylinder in order to overcome prior art middle gear racks cylinders shaft itself is ventilated all acts on jump ring, causes the abrasion of jump ring and axle to accelerate.Dismounting cylinder, countershaft front end carries out repair welding processing, and processing time consuming is laborious, installs the most very time-consuming, laborious；Rotating shaft front end does not has preventer, causes dust or dirty entrance, easily causes axle problem of bite in rotation process, it is provided that a kind of rack-and-pinion cylinder.

This utility model solves its technical problem and be the technical scheme is that a kind of rack-and-pinion cylinder, including end cap, rotating shaft and back-up ring, described axis of rotation is arranged on described end cap, described back-up ring sets with described rotating shaft card and is connected, also include bearing, described bearing holder (housing, cover) is located on described rotating shaft outer circumference surface, and the lower surface of described bearing contacts with described end cap, and the upper surface of described bearing contacts with described back-up ring.

Further, described bearing is thrust bearing.

The rotating shaft front end of traditional rack-and-pinion cylinder does not has preventer, causes dust or dirty entrance.Easily cause rotating shaft bite in rotation process; the end of rotating shaft described in the utility model is also installed with protective cover; described back-up ring and described bearing are respectively positioned on the inside of described protective cover; the lower surface of described protective cover and the upper surface of described end cap; it is used for preventing dust or dirty entrance, it is to avoid rotating shaft bite in rotation process.

Further, described protective cover is fixedly mounted on the end of described rotating shaft by screw.

Further, in order to more effectively prevent dust and dirty entrance, between lower surface and the upper surface of described end cap of described protective cover, it is installed with dust ring.

Owing to thrust bearing to be added needs countershaft front end to carry out transformation processing; the flat place of rotating shaft front end is carried out built-up welding; car is to size by drawing; then thrust bearing is set on described rotating shaft outer circumference surface; back-up ring is fastened on the end of rotating shaft, dust ring is set on the outer circumference surface of thrust bearing, finally protection set is fixed in rotating shaft; and dust ring is fixed, install.

The deadweight produced according to rotating shaft itself, after also having ventilation, rotating shaft moves down the power of generation, all bears on thrust bearing, and thrust bearing can bear axial force, it is ensured that cylinder rotating shaft will not occur upper and lower play phenomenon.Cylinder rotating shaft rotates when, it is also possible to overcome spindle abrasion；Adding protection cover, countershaft front end is protected, and prevents dust and foul from entering, it is to avoid rotating shaft bite in rotation process.

The beneficial effects of the utility model are: this utility model uses thrust bearing to bear the deadweight of rotating shaft itself, and after also having ventilation, rotating shaft moves down the power of generation, it is ensured that cylinder rotating shaft will not occur upper and lower play phenomenon.Cylinder axis rotates when, it is also possible to overcome spindle abrasion；Adding protection cover, countershaft front end is protected, and prevents dust and foul from entering, it is to avoid rotating shaft bite in rotation process.

Accompanying drawing explanation

With embodiment, this utility model is further illustrated below in conjunction with the accompanying drawings.

Fig. 1 is two-dimensional representation of the present utility model；

Fig. 2 is the enlarged drawing in this utility model Fig. 1 at A；

Fig. 3 is the top view of this utility model guide ring；

Fig. 4 is the sectional view in this utility model Fig. 3 at A-A；

Fig. 5 is the top view protecting set in this utility model；

Fig. 6 is the sectional view in this utility model Fig. 5 at B-B；

Fig. 7 is the two-dimentional sectional view of thrust bearing in this utility model；

Fig. 8 is the two-dimentional sectional view of this utility model dust ring.

In figure: 1. end cap, 2. rotating shaft, 3. back-up ring, 4. thrust bearing, 5. protective cover, 6. screw, 7. dust ring.

Detailed description of the invention

Presently in connection with accompanying drawing, the utility model is described in more detail.These accompanying drawings are the schematic diagram of simplification, and basic structure of the present utility model is described the most in a schematic way, and therefore it only shows the composition relevant with this utility model.

A kind of rack-and-pinion cylinder as shown in figures 1-8, including end cap 1, rotating shaft 2 and back-up ring 3, described rotating shaft 2 is rotatably installed on described end cap 1, described back-up ring 3 sets with described rotating shaft 2 card and is connected, also include thrust bearing 4, described thrust bearing 4 is set on described rotating shaft 2 outer circumference surface, and the lower surface of described thrust bearing 4 contacts with described end cap 1, and the upper surface of described thrust bearing 4 contacts with described back-up ring 3.

Rotating shaft 2 front end of traditional rack-and-pinion cylinder does not has preventer, causes dust or dirty entrance.Easily cause rotating shaft 2 bite in rotation process; the end of rotating shaft 2 described in the utility model is also installed with protective cover 5; described back-up ring 3 and described bearing are respectively positioned on the inside of described protective cover 5; the lower surface of described protective cover 5 and the upper surface of described end cap 1; it is used for preventing dust or dirty entrance; the rotating shaft 2 bite in rotation process, described protective cover 5 is avoided to be fixedly mounted on the end of described rotating shaft 2 by screw 6.In order to more effectively prevent dust and dirty entrance, between lower surface and the upper surface of described end cap 1 of described protective cover 5, it is installed with dust ring 7.

Owing to thrust bearing 4 to be added needs countershaft 2 front end to carry out transformation processing; the flat place of rotating shaft 2 front end is carried out built-up welding; car is to size by drawing; then thrust bearing 4 is set on described rotating shaft 2 outer circumference surface; back-up ring 3 is fastened on the end of rotating shaft 2, dust ring 7 is set on the outer circumference surface of thrust bearing 4, finally protection set is fixed in rotating shaft 2; and dust ring 7 is fixed, install.

The deadweight itself produced according to rotating shaft 2, after also having ventilation, rotating shaft 2 moves down the power of generation, all bears on thrust bearing 4, and thrust bearing 4 can bear axial force, it is ensured that cylinder rotating shaft 2 will not occur upper and lower play phenomenon.Cylinder rotating shaft 2 rotates when, it is also possible to overcome spindle abrasion；Adding protection cover 5, countershaft 2 front end is protected, and prevents dust and foul from entering, it is to avoid the rotating shaft 2 bite in rotation process.

With above-mentioned according to desirable embodiment of the present utility model for enlightenment, by above-mentioned description, relevant staff can carry out various change and amendment completely in the range of without departing from this utility model technological thought.The content that the technical scope of this utility model is not limited in description, it is necessary to determine its technical scope according to right.

Claims (5)

1. a rack-and-pinion cylinder, including end cap (1), rotating shaft (2) and back-up ring (3), described rotating shaft (2) is rotatably installed on described end cap (1), described back-up ring (3) sets with described rotating shaft (2) card and is connected, it is characterized in that: also include bearing, described bearing holder (housing, cover) is located on described rotating shaft (2) outer circumference surface, the lower surface of described bearing contacts with described end cap (1), and the upper surface of described bearing contacts with described back-up ring (3).

2. rack-and-pinion cylinder as claimed in claim 1, it is characterised in that: described bearing is thrust bearing (4).

3. rack-and-pinion cylinder as claimed in claim 1; it is characterized in that: the end of described rotating shaft (2) is also installed with protective cover (5); described back-up ring (3) and described bearing are respectively positioned on the upper surface of the inside of described protective cover (5), the lower surface of described protective cover (5) and described end cap (1).

4. rack-and-pinion cylinder as claimed in claim 3, it is characterised in that: described protective cover (5) is fixedly mounted on the end of described rotating shaft (2) by screw (6).

5. rack-and-pinion cylinder as claimed in claim 3, it is characterised in that: it is installed with dust ring (7) between lower surface and the upper surface of described end cap (1) of described protective cover (5).