Hydraulic cylinder with stroke adjustment facilitated

Abstract

The utility model relates to hydraulic pressure oil cylinder technical field especially is a kind of hydraulic pressure oil cylinder convenient to stroke adjustment, including cylinder barrel and piston rod, the one end of piston rod extension cylinder barrel is provided with extension shell, the one side of extension shell is equipped with positive and negative motor, the output of positive and negative motor penetrates the inside of extension shell and is connected with driving gear, in the utility model, the length of the one end of piston rod extension cylinder barrel outside can be adjusted twice, so the stroke of hydraulic pressure oil cylinder can be quickly made up according to use demand, improve the applicability of hydraulic pressure oil cylinder, without replacing hydraulic pressure oil cylinder, it is easy to operate, convenient to use, and practicality is strong.

Description

TECHNICAL FIELD

[0001] The utility model relates to hydraulic oil cylinder technical field, concretely is a kind of hydraulic oil cylinder of stroke adjustment is convenient. BACKGROUND

[0002] Hydraulic cylinder is the hydraulic energy conversion into mechanical energy, do linear reciprocating motion (or swing motion) the hydraulic actuator, it simple structure, work reliable. When using it to realize reciprocating motion, can avoid deceleration device, and there is no transmission gap, movement is stable, so it is widely used in the hydraulic system of various machines.

[0003] But because the stroke of existing hydraulic oil cylinder is limited, the limitation in use is greater in use process, the scope of application is narrow, when needing to adjust stroke interval is greater than the total length of hydraulic oil cylinder telescopic rod, it needs to replace matching specification hydraulic oil cylinder, and it is not convenient to adjust the stroke of hydraulic oil cylinder according to actual use demand, it is more inconvenient to use.

[0004] Therefore, it is particularly important to design a kind of hydraulic oil cylinder of stroke adjustment is convenient to change the above technical defects, improve overall practicability. INVENTION CONTENTS

[0005] The utility model discloses a kind of hydraulic oil cylinder of stroke adjustment is convenient, to solve the problem raised in above background technology.

[0006] To achieve the above object, the utility model provides the following technical scheme:

[0007] A kind of hydraulic oil cylinder of stroke adjustment is convenient, including cylinder barrel and piston rod, the one end of the piston rod extending out cylinder barrel is provided with extension shell, one side of the extension shell is installed with positive and negative motor, the output of the positive and negative motor is penetrated through the inside of extension shell and is connected with driving gear, the inside of the extension shell and below driving gear is provided with the driving rack for cooperation with driving gear, the left and right sides of the driving rack are all provided with guide convex strip, the front end of the driving rack is connected with extension rod, the rear side of the extension shell and the front end of extension rod are all fixed with fixed seat, the front surface of the fixed seat located in front side is fixed with connecting ear.

[0008] As the preferred scheme of the utility model, the outside of the cylinder barrel is provided with controller, wherein controller is connected between positive and negative motor through wire, and the connection mode is electric connection.

[0009] As the preferred scheme of the utility model, the connection mode between the driving rack and driving gear is meshing connection.

[0010] As the preferred scheme of the utility model, the left and right sides in the extension shell are all provided with limiting recess that is slidably matched with guide convex strip.

[0011] As the preferred scheme of the utility model, the front end of the extension shell is provided with a through hole for the front and back movement of the extension rod.

[0012] As the preferred scheme of the utility model, the fixing seat at the rear side is fixedly connected with the front end of the piston rod through a bolt.

[0013] Compared with the prior art, the utility model has the beneficial effects that:

[0014] In the utility model, the front end of the piston rod is provided with a set of extension shells, when the normal and reverse motor on the extension shell is started, the meshing of the driving gear and the driving rack is driven, so that the driving rack moves back and forth in the extension shell, and the extension rod is driven to stretch and retract, that is, the length of the one end of the piston rod extending outside the cylinder barrel can be adjusted twice, so that the stroke of the hydraulic oil cylinder can be quickly compensated according to the use requirement, the applicability of the hydraulic oil cylinder is improved, the hydraulic oil cylinder does not need to be replaced, the operation is simple, convenient and practical. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 It is the overall structure perspective view of the utility model;

[0016] Fig. 2 It is the piston rod structure schematic view of the utility model;

[0017] Fig. 3 It is the extension shell internal structure view of the utility model.

[0018] In the drawing: 1, cylinder barrel; 2, piston rod; 3, extension shell; 301, normal and reverse motor; 302, driving gear; 303, driving rack; 304, guide convex strip; 305, extension rod; 306, fixing seat; 4, connecting ear hook. DETAILED DESCRIPTION

[0019] The technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the embodiments of the utility model, obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments, based on the embodiments in the utility model, all other embodiments obtained by the ordinary skill in the art without creative labor belong to the protection scope of the utility model.

[0020] For the convenience of understanding the utility model, the utility model will be described more fully below with reference to the relevant drawings, several embodiments of the utility model are given, however, the utility model can be realized in many different forms, and is not limited to the embodiments described herein, on the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive.

[0021] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can be intervening elements, and when an element is referred to as being "connected to" another element, it can be directly connected to the other element or there can be intervening elements, the terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the utility model belongs, the terminology used in the specification of the utility model herein is only for the purpose of describing specific embodiments and is not intended to limit the utility model, the term "and / or" used herein includes any and all combinations of one or more of the associated listed items.

[0023] Embodiments, please refer to Figs. 1-3 The utility model provides a technical scheme:

[0024] A hydraulic oil cylinder convenient for stroke adjustment, including cylinder 1 and piston rod 2, the one end of piston rod 2 extends out cylinder 1 and is provided with extension housing 3, the one side of extension housing 3 is installed with positive and negative motor 301, the output of positive and negative motor 301 is through the inside of extension housing 3 and is connected with drive gear 302, the inside of extension housing 3 and the below of drive gear 302 are provided with drive rack 303 used in cooperation with drive gear 302, the left and right sides of drive rack 303 are all provided with guide convex strip 304, the front end of drive rack 303 is connected with extension rod 305, when positive and negative motor 301 on extension housing 4 starts, drive gear 302 and drive rack 303 are engaged, so that drive rack 303 moves back and forth in the inside of extension housing 3, to drive the extension of extension rod 305, the rear side of extension housing 3 and the front end of extension rod 305 are all fixed with fixed seat 306, the front surface of fixed seat 306 on the front side is fixed with connecting ear hook 4;

[0025] The outer side of the cylinder barrel 1 is provided with a controller, the controller is connected with the forward-reverse motor 301 through wires, the connection mode is electrical connection, the connection mode between the driving rack 303 and the driving gear 302 is meshing connection, the left and right sides of the extension shell 3 are both provided with limiting grooves which are in sliding fit with the guide convex strip 304, the stroke is more stable, the front end of the extension shell 3 is provided with a through hole for the front and back movement of the extension rod 305, and the fixing seat 306 located at the rear side is fixedly connected with the front end of the piston rod 2 through bolts.

[0026] The utility model discloses a working procedure: through increasing a group of extension shell 4 at the front end of piston rod 2, when the forward-reverse motor 301 on the extension shell 4 starts, the meshing of driving gear 302 and driving rack 303 is driven, thereby making driving rack 303 move back and forth in the inside of extension shell 3, the extension rod 305 is driven to stretch out or retract, that is, the length of the one end of piston rod 2 extending outside cylinder barrel 1 can be adjusted twice, thereby the stroke of hydraulic oil cylinder can be quickly made up according to the use demand, the applicability of hydraulic oil cylinder is improved, the hydraulic oil cylinder need not be replaced, the operation is simple, convenient to use, and the practicality is strong.

[0027] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and its equivalents.

Claims

1. A hydraulic cylinder with easy stroke adjustment comprising a cylinder barrel (1) and a piston rod (2), characterized in that: The piston rod (2) extends out of one end of the cylinder (1) and is provided with an extension shell (3), one side of the extension shell (3) is mounted with a reversible motor (301), the output end of the reversible motor (301) penetrates through the inside of the extension shell (3) and is connected with a drive gear (302), the inside of the extension shell (3) and below the drive gear (302) is provided with a drive rack (303) matched with the drive gear (302), the left and right sides of the drive rack (303) are provided with guide convex strips (304), the front end of the drive rack (303) is connected with an extension rod (305), the rear side of the extension shell (3) and the front end of the extension rod (305) are fixedly provided with fixed seats (306), the front surface of the fixed seat (306) on the front side is fixedly provided with a connecting ear hook (4).

2. The hydraulic cylinder with easy stroke adjustment of claim 1, wherein: The outer side of the cylinder (1) is provided with a controller, wherein the controller is connected with the reversible motor (301) through wires, and the connection mode is electrical connection.

3. The hydraulic cylinder with easy stroke adjustment of claim 1, wherein: The connection mode between the drive rack (303) and the drive gear (302) is meshing connection.

4. The hydraulic cylinder with easy stroke adjustment of claim 1, wherein: The left and right sides of the inside of the extension shell (3) are both provided with limiting grooves which are slidably matched with the guide convex strips (304).

5. The hydraulic cylinder with easy stroke adjustment of claim 1, wherein: The front end of the extension shell (3) is provided with a through hole for the front and back movement of the extension rod (305).

6. The hydraulic cylinder with easy stroke adjustment of claim 1, wherein: The fixed seat (306) on the rear side is fixedly connected with the front end of the piston rod (2) through bolts.

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