Device for finely adjusting piston rod end

Abstract

The utility model provides a device for finely adjusting a piston rod end, which comprises a piston rod, a fixed seat, a spring, a movable seat and an adjusting nut, the piston is sleeved on the piston rod and arranged in a cylinder barrel, and a control end of the piston rod extends out of the cylinder barrel and sequentially penetrates through the fixed seat, the spring and the movable seat. The outer side of the movable seat is fixed through an adjusting nut, the fixed seat abuts against the outer end face of the cylinder barrel, the movable seat is of a cylindrical structure, the fixed seat is sleeved with the movable seat, a cavity for containing the spring is formed between the movable seat and the fixed seat, the spring is extruded by the fixed seat and the movable seat, and the movable seat is connected with the piston rod through threads. According to the device for finely adjusting the end of the piston rod, the stroke of the end of the piston rod can be determined through the movable seat and the fixed seat, and fine adjustment of the stroke is achieved by adjusting the distance between the movable seat and the fixed seat.

Description

TECHNICAL FIELD

[0001] The utility model relates to hydraulic control technical field especially relates to a device of fine adjustment to piston rod end. BACKGROUND

[0002] The existing hydraulic cylinder stroke adjustment mostly adopts the screw adjustment mode, for example, the prior art CN101608647A discloses the device and method for adjusting the stroke of the hydraulic cylinder, which designs the adjusting bolt on one end of the piston rod to adjust the stroke of the piston rod, but the adjusting mechanism is fixed adjustment, and its adjusting precision is limited. SUMMARY

[0003] The utility model discloses to solve the technical problems to provide a device of fine adjustment to piston rod end, solve the problem of fine adjustment to the stroke of the piston rod of the hydraulic cylinder.

[0004] In order to solve the above technical problem, the utility model provides a device of fine adjustment to piston rod end, including piston rod, cylinder barrel, piston, fixed seat, spring, movable seat and adjusting nut, the piston sleeve is connected on the piston rod, and the piston is placed in the cylinder barrel, the control end of the piston rod is out of the cylinder barrel, wherein, the control end of the piston rod passes through the fixed seat, the spring and the movable seat in proper order, and is fixed on the outside of movable seat through adjusting nut, the fixed seat is in abutment with the outer end surface of the cylinder barrel, the movable seat is the cylindrical structure, the movable seat is connected on the outside of the fixed seat, to form the cavity of accommodating spring between the movable seat and the fixed seat, the spring is extruded by the fixed seat and the movable seat, the movable seat is connected with the piston rod through the screw.

[0005] The fixed seat is matched with the piston rod or is connected with the piston rod in sliding.

[0006] The fixed seat is fixedly connected with the outer end of the cylinder barrel.

[0007] The fixed seat is equipped with the recess of accommodating spring, the inside center of the movable seat is equipped with the boss, the boss is in abutement with the spring, and the radial dimension of the boss is less than the recess, so that the boss can enter the recess.

[0008] The boss and the outer wall of the movable seat form annular groove, so that the front end of the fixed seat can enter the annular groove.

[0009] The root size of the fixed seat is greater than the end size, and the root and the end are matched with the step surface of the movable seat respectively.

[0010] The proximal end surface of the movable seat and the proximal end surface of the root are respectively provided with scales.

[0011] The distal end of the movable seat is provided with a transverse blind hole or a through hole for inserting an external pin and then rotating the movable seat.

[0012] The end part of the adjusting nut and the piston rod is respectively provided with a radial pin hole, and the pin hole on the piston rod has a greater axial length, so that the adjusting nut can be inserted into the pin holes of the adjusting nut and the piston rod through the pin after rotating a certain distance.

[0013] The proximal end of the movable seat refers to the end close to the cylinder, and the distal end refers to the end away from the cylinder.

[0014] The device for fine-tuning the end of the piston rod provided by the utility model can determine the stroke of the end of the piston rod through the movable seat and the fixed seat, and fine-tune the stroke by adjusting the distance between the movable seat and the fixed seat; since the external connection positions of the movable seat and the fixed seat are respectively provided with scales, the rotation distance after rotating the movable seat can be obtained from the outside, and the amplitude of the fine-tuning stroke can be known, thereby providing a reference for high-precision control of the stroke of the hydraulic oil cylinder. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 The device for fine-tuning the end of the piston rod is a structural schematic view.

[0016] Fig. 2 The device for fine-tuning the end of the piston rod is a structural schematic view.

[0017] In the drawings:

[0018] 1-piston rod, 2-cylinder, 3-piston, 4-fixed seat, 5-spring, 6-movable seat, 7-adjusting nut, 8-scale. DETAILED DESCRIPTION

[0019] In order to make the above-mentioned purpose, features and advantages of the utility model more obvious and easy to understand, the specific implementation of the utility model will be described in detail below. In the following description, a lot of specific details are set forth in order to fully understand the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0020] It should be noted that when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. Where, when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements can also be present. As used herein the terms "vertical", "horizontal", "left", "right" and similar terms are used for explanation purposes only.

[0021] 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 this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0022] Reference Figs. 1-2 As shown in the drawings, the application provides a device for fine adjustment of the end of a piston rod, comprising a piston rod 1, a cylinder barrel 2, a piston 3, a fixed seat 4, a spring 5, a movable seat 6 and an adjusting nut 7.

[0023] The piston 3 is sleeved on the piston rod 1, the right side of the piston rod 3 is a power output end, the left side is a stroke control end, the left end is externally threaded, and the adjusting nut and the movable seat are connected to the external threads.

[0024] The piston 3 is placed in the cylinder barrel 2, the left side of the piston is a piston cap, which is in sliding connection with the inner wall of the cylinder barrel 2, and the right side is a smaller cylindrical structure, which is in sliding connection with the sealing end on the right side of the cylinder barrel 2. The two sides of the piston cap divide the cylinder barrel 2 into two chambers, which are used to fill hydraulic oil.

[0025] The control end of the piston rod 1 extends out of the cylinder barrel 2, wherein the control end of the piston rod 1 passes through the fixed seat 4, the spring 5 and the movable seat 6 in sequence, and is fixed on the outside of the movable seat through the adjusting nut 7, the fixed seat 4 abuts against the outer end face of the cylinder barrel 2, the movable seat 6 is a cylindrical structure, the movable seat 6 is sleeved on the outside of the fixed seat 4 to form a chamber accommodating the spring 5 between the movable seat 6 and the fixed seat 4, the spring 5 is squeezed by the fixed seat 4 and the movable seat 6, and the movable seat 6 is connected with the piston rod through threads. The movable seat 6 is fixedly connected with the piston rod 1 and can perform telescopic movement with the piston rod 1; the spring 5 provides elastic support for the movable seat 6 to facilitate the reset of the movable seat 6. The adjusting nut 7 is fixed on the outside of the movable seat 6 to limit the movable seat 6, so that the position of the movable seat 6 on the piston rod 1 can be adjusted and locked through the adjusting nut.

[0026] The fixed seat 4 is in clearance fit or sliding connection with the piston rod 1.

[0027] The fixed seat 4 is fixedly connected with the outer end of the cylinder barrel, so that the fixed seat 4 is not fixedly positioned and cannot rotate during the adjustment of the movable seat 6.

[0028] The fixed seat 4 is provided with a groove for accommodating the spring 5, and the groove is cylindrical and can accommodate the piston rod and the spring.

[0029] The movable seat 6 is provided with a boss in the inner center, the boss abuts against the spring, and the radial dimension of the boss is smaller than that of the groove, so that the boss can enter the groove.

[0030] The boss and the outer wall of the movable seat 6 form an annular groove, so that the front end of the fixed seat can enter the annular groove.

[0031] The root of the fixed seat 4 has a dimension larger than that of the tip, and the root and the tip are respectively matched with the stepped surface of the movable seat.

[0032] The distal end of the movable seat is provided with a transverse blind hole or a through hole, so as to be inserted by an external pin and then rotate the movable seat.

[0033] The adjusting nut 7 and the end of the piston rod 1 are respectively provided with radial pin holes, and the pin hole on the piston rod has a larger axial length, so that the adjusting nut can be inserted into the pin holes of the adjusting nut and the piston rod after rotating a certain distance.

[0034] The proximal end of the movable seat refers to the end close to the cylinder barrel, and the distal end refers to the end away from the cylinder barrel.

[0035] The device for fine adjustment of the end of the piston rod can determine the stroke of the end of the piston rod through the movable seat and the fixed seat, and can fine adjust the stroke by adjusting the distance between the movable seat and the fixed seat.

[0036] The technical features of the above-described embodiments can be combined in any manner, and to make the description concise, all possible combinations of the technical features in the above-described embodiments are not described, however, as long as the combinations of the technical features do not exist contradictions, they should be considered as the scope of the present application.

[0037] The above embodiments only express several embodiments of the utility model, the description is more specific and detailed, but it cannot be understood as the limitation of the utility model patent range. It should be pointed out that for ordinary skilled person in the art, without departing from the utility model concept, several modifications and improvements can be made, which belong to the protection range of the utility model. Therefore, the protection range of the utility model patent should be subject to the appended claims.

Claims

1. A device for fine adjustment of a piston rod end, characterized in that The piston rod, cylinder, piston, fixed seat, spring, movable seat and adjusting nut, the piston sleeve is connected to the piston rod, the piston is placed in the cylinder, the control end of the piston rod extends out of the cylinder, wherein the control end of the piston rod passes through the fixed seat, the spring and the movable seat in sequence, and is fixed by the adjusting nut outside the movable seat, the fixed seat abuts against the outer end surface of the cylinder, the movable seat is a cylindrical structure, the movable seat is sleeved outside the fixed seat to form a spring containing cavity between the movable seat and the fixed seat, the spring is extruded by the fixed seat and the movable seat, and the movable seat is connected with the piston rod through threads.

2. The apparatus of claim 1, wherein, The fixed seat is in clearance fit or sliding connection with the piston rod.

3. The apparatus of claim 1, wherein, The fixed seat is fixedly connected with the outer end of the cylinder.

4. The apparatus of claim 1, wherein, The fixed seat is provided with a spring containing groove, the inner center of the movable seat is provided with a boss, the boss abuts against the spring, and the radial dimension of the boss is smaller than that of the groove, so that the boss can enter the groove.

5. The apparatus of claim 4, wherein, The boss and the outer wall of the movable seat form an annular groove, so that the front end of the fixed seat can enter the annular groove.

6. The apparatus of claim 5, wherein, The root size of the fixed seat is greater than the tip size, and the root and the tip are matched with the stepped surface of the movable seat respectively.

7. The apparatus of claim 6, wherein, The root and the proximal end surface of the movable seat are respectively provided with scales.

8. The apparatus of claim 7, wherein, The distal end of the movable seat is provided with a transverse blind hole or a through hole, so as to be inserted by an external pin, and then the movable seat is rotated.

9. The apparatus of claim 1, wherein, The adjusting nut and the end of the piston rod are respectively provided with radial pin holes, and the pin hole on the piston rod is longer in the axial length of the piston rod, so that the adjusting nut can be inserted into the pin holes of the adjusting nut and the piston rod after rotating a certain distance.

10. The apparatus of claim 8, wherein, The proximal end of the movable seat refers to the end close to the cylinder, and the distal end refers to the end away from the cylinder.

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