CN203214473U

CN203214473U - Oil cylinder

Info

Publication number: CN203214473U
Application number: CN 201320220459
Authority: CN
Inventors: 肖敏; 陈贤圣
Original assignee: Changsha Zhonglian Fire Fighting Machinery Co ltd; Zoomlion Heavy Industry Science and Technology Co Ltd
Current assignee: Changsha Zhonglian Fire Fighting Machinery Co ltd; Zoomlion Heavy Industry Science and Technology Co Ltd
Priority date: 2013-04-26
Filing date: 2013-04-26
Publication date: 2013-09-25
Anticipated expiration: 2023-04-26

Abstract

The utility model provides a hydro-cylinder, include: a cylinder barrel; the piston is arranged in the cylinder barrel, and a rack and a sliding chute are arranged on the piston; the gear is pivotally connected with the cylinder barrel and meshed with the rack; the guide block is installed on the inner side of the cylinder barrel and is located in the sliding groove. When the moment that makes the rack rotatory is acted on the rack, at rack reciprocating motion's in-process, because the effect of spout and guide block, the rack can only be along the axis reciprocating motion of cylinder, and can not rotate around the axis of hydro-cylinder, the rack can not take place rotatoryly promptly, consequently, can guarantee the exact meshing between gear and the rack, thereby can not influence the transmission precision of gear pair, produce impact and abnormal sound when having reduced the meshing, the driven reliability has been improved, and simultaneously, the vice wearing and tearing aggravation of gear has still been reduced, and service life is prolonged.

Description

Oil cylinder

Technical field

The utility model relates to Hydraulic Field, more specifically, relates to a kind of oil cylinder.

Background technique

The gear rack oil cylinder is the very wide device of a kind of application, and its effect is to make the linear reciprocating motion of tooth bar be converted into rotatablely moving of gear, and it is widely used in the mechanism of swirl gear, swing mechanism and other discontinuous rotations of engineering machinery.

Show the structural representation of a kind of oil cylinder of the prior art as Fig. 1.As shown in Figure 1, this oil cylinder comprises cylinder barrel 1, piston 2 and gear 5, and piston 2 is provided with the tooth bar 3 with gear 5 engagements.When the left end oil-feed of oil cylinder, tooth bar 3 moves right, thereby driven gear 5 is rotated counterclockwise.When the right-hand member oil-feed of oil cylinder, tooth bar 3 is to left movement, thereby driven gear 5 turns clockwise.Like this, the linear reciprocating motion of tooth bar 3 is converted into rotatablely moving of gear 5.

Oil cylinder among Fig. 1 is when motion, if make tooth bar 3 rotating moment in tooth bar 3 effects, can make tooth bar 3 around the axis rotation of piston 2, so that can not correctly mesh between gear 5 and the tooth bar 3, thereby cause the transmission accuracy of gear pair to descend, produce during engagement and impact and abnormal sound, reduced the reliability of transmission, simultaneously, also can make gear pair wearing and tearing aggravation, influence working life.

The model utility content

The utility model aim to provide a kind of simple in structure, can prevent tooth bar rotation, reduce mesh impact and abnormal sound, the oil cylinder of reliability height, long service life.

For solving the problems of the technologies described above, according to an aspect of the present utility model, provide a kind of oil cylinder, comprising: cylinder barrel; Piston, piston are arranged in the cylinder barrel, and piston is provided with tooth bar and chute; Gear, gear is connected pivotly with cylinder barrel, and the wheel and rack engagement; Guide pad, guide pad are installed in the inboard of cylinder barrel, and guide pad is positioned at chute.

Further, the length of chute is greater than the stroke of piston.

Further, the radial cross section centering corresponding to the gyration center place of gear of piston is passed guide pad.

Further, guide pad is connected with cylinder barrel by screw.

Further, the cross section of chute comprises two sides and a base, and two sides are connected with the two ends on base respectively, and guide pad has the shape that matches with chute.

Further, two sides are parallel to each other.

Further, the straight line at two side places intersects.

Further, chute and tooth bar arrange symmetrically about the axis of piston.

Further, chute is arranged on the position of departing from tooth bar place diameter on the piston.

When effect on the tooth bar makes the tooth bar rotating moment, in the reciprocating process of tooth bar, because the effect of chute and guide pad, tooth bar can only be along the axis to-and-fro motion of cylinder barrel, and can not rotate around the axis of oil cylinder, be that tooth bar can not rotate, therefore, can guarantee the correct engagement between the wheel and rack, thereby can not influence the transmission accuracy of gear pair, produce when having reduced engagement and impact and abnormal sound, improved the reliability of transmission, simultaneously, also reduce gear pair wearing and tearing aggravation, prolonged working life.

Description of drawings

The accompanying drawing that constitutes the application's a part is used to provide further understanding of the present utility model, and illustrative examples of the present utility model and explanation thereof are used for explaining the utility model, do not constitute improper restriction of the present utility model.In the accompanying drawings:

Fig. 1 has schematically shown the structural representation of oil cylinder of the prior art;

Fig. 2 has schematically shown the structural representation of the oil cylinder in the utility model;

Fig. 3 schematically shown piston and guide pad the A of Fig. 2 to scheme of installation;

Fig. 4 has schematically shown the partial sectional view among the embodiment; And

Fig. 5 has schematically shown the partial sectional view among another embodiment.

Reference character among the figure: 1, cylinder barrel; 2, piston; 3, tooth bar; 4, chute; 5, gear; 6, guide pad; 7, screw; 8, side; 9, base.

Embodiment

Below in conjunction with accompanying drawing embodiment of the present utility model is elaborated, but the multitude of different ways that the utility model can be defined by the claims and cover is implemented.

Please refer to Fig. 2 to Fig. 4, the utility model provides a kind of oil cylinder, comprising: cylinder barrel 1; Piston 2, piston 2 are arranged in the cylinder barrel 1, and piston 2 is provided with tooth bar 3 and chute 4; Gear 5, gear 5 is connected pivotly with cylinder barrel 1, and gear 5 and tooth bar 3 engagements; Guide pad 6, guide pad 6 is installed in the inboard of cylinder barrel 1, and guide pad 6 is positioned at chute 4.

When effect on the tooth bar 3 makes tooth bar 3 rotating moment, in tooth bar 3 reciprocating processes, because the effect of chute 4 and guide pad 6, tooth bar 3 can only be along the axis to-and-fro motion of cylinder barrel 1, and can not rotate around the axis of oil cylinder, be that tooth bar 3 can not rotate, therefore, can guarantee the correct engagement between gear 5 and the tooth bar 3, thereby can not influence the transmission accuracy of gear pair, produce when having reduced engagement and impact and abnormal sound, improved the reliability of transmission, simultaneously, also reduce gear pair wearing and tearing aggravation, prolonged working life.

Preferably, the length of chute 4 is greater than the stroke of piston 2.Obviously, the length of chute 4 also can equal the stroke of piston 2.When the length of chute 4 during greater than the stroke of piston 2, can prevent in piston 2 movement processes problem that the end of chute 4 and guide pad 6 bump.

In a preferred embodiment, the radial cross section centering corresponding to the gyration center place of gear 5 of piston 2 is passed guide pad 6, for example guide pad 6 be positioned at gear 5 under.Certainly, guide pad 6 also can be positioned at other position.In addition, the quantity of guide pad 6 also can be a plurality of, for example two etc.

Preferably, guide pad 6 is connected with cylinder barrel 1 by screw 7.For example, can on cylinder barrel 1 and guide pad 6, offer the screw of two or more correspondences respectively, like this, just can guide pad 6 be fixed on the cylinder barrel 1 by screw 7.

Preferably, the cross section of chute 4 comprises that 9, two sides 8 of two sides 8 and a base are connected with the two ends on base 9 respectively, and guide pad 6 has the shape that matches with chute 4.Preferably, please refer to Fig. 4, two sides 8 are parallel to each other.Preferably, please refer to Fig. 5, the straight line at two side 8 places intersects.Obviously, other form also can be adopted in side 8 and base 9, for example camber line etc.

Preferably, in the embodiment shown in fig. 4, chute 4 arranges symmetrically with the axis of tooth bar 3 about piston 2, for example, chute 4 be arranged on piston 2 under, tooth bar 3 be arranged on piston 2 directly over.Preferably, in the embodiment shown in fig. 5, chute 4 is arranged on the position of departing from tooth bar 3 place diameters on the piston 2, and at this moment, chute 4 asymmetricly arranges with tooth bar 3, and the axis with respect to piston 2 between the two has an angle.

Need to prove that the position of chute 4 can be opened in the side of tooth bar 3 or other can open the position of chute, the shape of guide pad 6 also can be other shapes.

The above is preferred embodiment of the present utility model only, is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.

Claims

1. an oil cylinder is characterized in that, comprising:

Cylinder barrel (1);

Piston (2), described piston (2) are arranged in the described cylinder barrel (1), and described piston (2) is provided with tooth bar (3) and chute (4);

Gear (5), described gear (5) is connected pivotly with described cylinder barrel (1), and described gear (5) and described tooth bar (3) engagement;

Guide pad (6), described guide pad (6) is installed in the inboard of described cylinder barrel (1), and described guide pad (6) is positioned at described chute (4).

2. oil cylinder according to claim 1 is characterized in that, the length of described chute (4) is greater than the stroke of described piston (2).

3. oil cylinder according to claim 1 is characterized in that, the radial cross section centering corresponding to the gyration center place of described gear (5) of described piston (2) is passed described guide pad (6).

4. oil cylinder according to claim 1 is characterized in that, described guide pad (6) is connected with described cylinder barrel (1) by screw (7).

5. oil cylinder according to claim 1, it is characterized in that, the cross section of described chute (4) comprises two sides (8) and a base (9), described two sides (8) are connected with the two ends of described base (9) respectively, and described guide pad (6) has the shape that matches with described chute (4).

6. oil cylinder according to claim 5 is characterized in that, described two sides (8) are parallel to each other.

7. oil cylinder according to claim 5 is characterized in that, the straight line at described two sides (8) place intersects.

8. oil cylinder according to claim 1 is characterized in that, described chute (4) arranges symmetrically with the axis of described tooth bar (3) about described piston (2).

9. oil cylinder according to claim 1 is characterized in that, described chute (4) is arranged on the position of departing from described tooth bar (3) place diameter on the described piston (2).