阅读说明：本技术 一种感应活塞杆结构 (Induction piston rod structure ) 是由 夏增富 夏瑜键 于 2019-08-17 设计创作，主要内容包括：一种感应活塞杆结构,包括杆体,杆体的一端与活塞相连接,杆体的另一端是能与活塞驱动机构相连接的传动端,在杆体的外壁上轴向间隔地设置有能与感应针相顶触而测量杆体移动距离的感应槽,相邻感应槽的间距均相同,相邻感应槽的间距为1～4mm。其优点在于：杆体上的感应槽类似设置在杆体表面的刻度尺,但杆体移动距离的具体测量通过感应针在感应槽上移动发生电位变化的方式进行,相比肉眼直接观察杆体刻度,精确度更高,测量效率也更高,而且采用感应槽与感应针的组合无需使用光栅尺,因而能利用成本远低于光栅尺的方法实现对活塞杆移动距离的精确测量。(The utility model provides an induction piston rod structure, includes the body of rod, and the one end of the body of rod is connected with the piston, and the other end of the body of rod is the transmission end that can be connected with piston actuating mechanism, is provided with the response groove that can push up mutually with the response needle and measure body of rod displacement on the outer wall of the body of rod axially at an interval, and the interval homogeneous phase in adjacent response groove is the same, and the interval in adjacent response groove is 1 ~ 4 mm. The advantages are that: the similar scale that sets up on body of rod surface of rod of the response groove on the body of rod, but body of rod displacement's concrete measurement is gone on through the mode that the response needle moved the emergence potential change on the response groove, compares the naked eye direct observation body of rod scale, and the accuracy is higher, and measurement efficiency is also higher, adopts the combination of response groove and response needle to need not to use grating chi moreover, therefore can utilize the cost to be far less than the method realization of grating chi to piston rod displacement's accurate measurement.)

1. The utility model provides an induction piston rod structure, includes the body of rod (1), the one end of the body of rod (1) is connected with piston (3), the other end of the body of rod (1) is transmission end (12) that can be connected with piston actuating mechanism, its characterized in that: be provided with on the outer wall of the body of rod (1) axially at interval and can push up with response needle (2) mutually and touch and measure body of rod (1) displacement's response groove (11), interval (L) homogeneous phase in adjacent response groove, interval (L) in adjacent response groove is 1 ~ 4 mm.

2. An inductive piston rod structure according to claim 1, characterized in that: the induction groove (11) is an annular groove, and the distance (L) between every two adjacent annular grooves is 2 mm.

3. An inductive piston rod structure according to claim 2, characterized in that: the rod body (1) is composed of a transmission section (A), an induction section (B) and a connecting section (C), the diameter of the induction part (B) is larger than that of the transmission section (A) and that of the connecting section (C) respectively, and the surface of the induction section (B) is a smooth round surface processed through polishing.

4. An inductive piston rod structure according to claim 3, characterized in that: and a chromium layer which is wear-resistant and corrosion-resistant is plated on the surface of the induction section (B).

5. An inductive piston rod structure according to any one of claims 2 to 4, characterized in that: the joint of the induction groove (11) and the outer wall of the rod body is an arc angle which can reduce the abrasion of the induction needle (2).

6. An inductive piston rod structure according to any one of claims 1 to 4, characterized in that: the rod body (1) and the piston (3) are of an integral structure, the piston (3) comprises a first cylinder (31) connected with the rod body (1) and a second cylinder (32) capable of extending into the oil cylinder, the diameter of the second cylinder (32) is larger than that of the first cylinder (31), and the diameter of the first cylinder (31) is larger than that of the rod body (1).

7. An inductive piston rod structure according to claim 6, characterized in that: the side wall of the second cylinder (32) is provided with side wall annular grooves capable of mounting sealing rings at intervals in the axial direction.

8. An inductive piston rod structure according to claim 7, characterized in that: the side wall annular groove has the specific structure that an annular side wall concave part (321) is arranged on the side wall of the second column body (32), copper rings (4) welded on the side wall concave part (321) through electric arc welding fusion are arranged on the bottom surface of the side wall concave part (321), and gaps between every two adjacent copper rings (4) are the side wall annular groove.

9. An inductive piston rod structure according to claim 8, characterized in that: the thickness of the copper ring (4) is larger than the depth of the side wall concave part (321).

10. An inductive piston rod structure according to any one of claims 1 to 4, characterized in that: the upper portion of response needle (2) is connected on the support of body of rod top, the top of response needle (2) passes through the circuit and constitutes the return circuit with control module, body of rod displacement display and power.

Technical Field

The invention relates to the technical field of piston rod manufacturing, in particular to an induction piston rod structure.

Background

The existing Chinese patent application with the application number of CN201210179416.5 entitled "Hydraulic oil Cylinder with measurable piston rod Displacement" discloses a hydraulic oil cylinder with measurable piston rod Displacement, which comprises a cylinder body, wherein a piston and a piston rod are arranged in the cylinder body, the two ends of the cylinder body are respectively connected with a cylinder head and a cylinder tail, one end of the cylinder head is connected with a hanging head, the piston rod is provided with a scale interval, and the scale interval is arranged at one end close to the hanging head. This hydraulic cylinder of measurable quantity piston rod displacement volume owing to set up the scale interval on the piston rod, can read out the displacement volume of piston rod from the scale interval directly perceivedly at the during operation, simplified installation and debugging work, convenient operation, the flexibility is better, has value to popularize and use. However, the precision of the scale value of the piston rod used by the hydraulic oil cylinder is low, and the precise control of the displacement of the piston rod cannot be realized, so the structure of the piston rod of the hydraulic oil cylinder needs to be further improved.

In the prior art, a grating ruler is needed to realize accurate control of the displacement of the piston rod, and the cost of the grating ruler is high, so that the method needs to be further improved.

Disclosure of Invention

The present invention provides an inductive piston rod structure with low manufacturing cost and capable of accurately measuring the displacement of the piston rod, aiming at the current situation of the prior art.

The technical scheme adopted by the invention for solving the technical problems is as follows: this response piston rod structure, including the body of rod, the one end of the body of rod is connected with the piston, the other end of the body of rod is the transmission end that can be connected with piston actuating mechanism, its characterized in that: the outer wall of the rod body is provided with induction grooves which can be contacted with the induction needles at intervals in the axial direction to measure the moving distance of the rod body, the intervals of the adjacent induction grooves are the same, and the intervals of the adjacent induction grooves are 1-4 mm.

As a refinement, the induction grooves may preferably be annular grooves, the spacing between adjacent annular grooves being 2 mm.

In a further improvement, the rod body preferably comprises a transmission section, an induction section and a connection section, the diameter of the induction part is respectively larger than that of the transmission section and that of the connection section, and the surface of the induction section is a polished smooth round surface.

In a further improvement, the surface of the induction section may preferably be plated with a wear-resistant and corrosion-resistant chromium layer.

As an improvement, the joint of the sensing groove and the outer wall of the rod body can be preferably an arc angle which can reduce the abrasion of the sensing needle.

As an improvement, the rod body and the piston may preferably be an integral structure, and the piston includes a first cylinder connected to the rod body and a second cylinder capable of extending into the oil cylinder, wherein the diameter of the second cylinder is greater than that of the first cylinder, and the diameter of the first cylinder is greater than that of the rod body.

In a further development, side-wall annular grooves, in which sealing rings can be fitted, can preferably be arranged axially spaced apart on the side walls of the second cylinder.

In a further improvement, the specific structure of the side wall annular groove may preferably be that an annular side wall concave part is arranged on the side wall of the second column, a copper ring welded on the side wall concave part by electric arc welding is arranged on the bottom surface of the side wall concave part, and a gap between adjacent copper rings is the side wall annular groove.

In a further refinement, the thickness of the copper ring may preferably be greater than the depth of the sidewall recess.

As an improvement, the upper part of the induction needle can be preferably connected to a bracket above the rod body, and the top of the induction needle forms a loop with the control module, the rod body moving distance display and the power supply through a circuit.

Compared with the prior art, the invention has the advantages that: the induction piston rod is simple in structure and low in manufacturing cost, the induction groove in the rod body is similar to a graduated scale arranged on the surface of the rod body, but the concrete measurement of the moving distance of the rod body is carried out in a mode that the induction needle moves on the induction groove to change the potential, compared with the mode that the rod body scale is directly observed by naked eyes, the precision is higher, the measurement efficiency is higher, and the combination of the induction groove and the induction needle is adopted, so that the grating scale is not needed, the accurate measurement of the moving distance of the piston rod can be realized by a method with the cost far lower than that of the grating scale, the measurement precision is high, and the measurement; with body of rod matched with piston surface through electric arc welding fusion welding have the copper ring, realize the direct bonding on copper ring and piston surface, overcome the technical difficult problem that the piston surface increases the copper ring, thereby cover solid sealing ring in the clearance between the copper ring and increased the leakproofness of piston, the result of use is more outstanding.

Drawings

FIG. 1 is a state diagram illustrating the use of an embodiment of the present invention;

FIG. 2 is a perspective view of an embodiment of the present invention;

FIG. 3 is an exploded view of the structure of FIG. 2;

FIG. 4 is a top view of FIG. 2;

FIG. 5 is a cross-sectional view taken along line A-A of FIG. 4;

FIG. 6 is an enlarged view of portion I of FIG. 1;

fig. 7 is an enlarged view of a portion II in fig. 5.

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

As shown in fig. 1 to 7, the sensing piston rod structure of this embodiment includes the body of rod 1, the one end of the body of rod 1 is connected with piston 3, the other end of the body of rod 1 is transmission end 12 that can be connected with piston actuating mechanism be provided with axially spaced on the outer wall of the body of rod 1 and can push up with response needle 2 and touch and measure the response groove 11 of the body of rod 1 displacement, and the interval L of adjacent response groove is equal the same, the interval L of adjacent response groove is 1 ~ 4 mm. The induction groove 11 is an annular groove, and the distance L between adjacent annular grooves is 2 mm. The rod body 1 is composed of a transmission section A, an induction section B and a connecting section C, the diameter of the induction part B is larger than that of the transmission section A and that of the connecting section C respectively, and the surface of the induction section B is a polished smooth round surface. And a wear-resistant and corrosion-resistant chromium layer is plated on the surface of the induction section B. The joint of the induction groove 11 and the outer wall of the rod body is an arc angle which can reduce the abrasion of the induction needle 2.

The rod body 1 and the piston 3 are integrally made into an integral structure, the piston 3 comprises a first cylinder 31 connected with the rod body 1 and a second cylinder 32 capable of extending into the oil cylinder, the diameter of the second cylinder 32 is larger than that of the first cylinder 31, and the diameter of the first cylinder 31 is larger than that of the rod body 1. The side wall of the second column 32 is provided with side wall annular grooves capable of mounting a seal ring at intervals in the axial direction. The side wall annular groove has the specific structure that an annular side wall concave part 321 is arranged on the side wall of the second column body 32, a copper ring 4 welded on the side wall concave part 321 through electric arc welding fusion by a copper wire is arranged on the bottom surface of the side wall concave part 321, and a gap between every two adjacent copper rings 4 is the side wall annular groove. The thickness of the copper ring 4 is greater than the depth of the side wall recess 321. The upper portion of response needle 2 is connected on the support of body of rod top, the top of response needle 2 constitutes the return circuit through circuit and control module, body of rod displacement display and power. The specific circuit structure of the control module and the rod body movement distance display belongs to the prior art, and therefore, the detailed description is omitted.

The working principle is as follows: the body of rod is advancing or the in-process of retreating, and the response needle can take place the potential variation in response trench position department, and control circuit record potential variation number of times, because the interval of adjacent response groove is the same, therefore control module can calculate the accurate displacement distance of the body of rod according to the potential variation number of times to move through the body of rod and show apart from the display.

The similar scale that sets up on body of rod surface in response groove, but body of rod displacement's concrete measurement is gone on through the mode that the response needle moved the emergence potential change on response groove, compares the naked eye direct observation body of rod scale, and the accuracy is higher, and adopts the combination of response groove and response needle to need not to use grating chi, therefore can utilize the cost to be far less than the method realization of grating chi to piston rod displacement's accurate measurement.