CN217874453U - Stroke limiting valve and detection tool - Google Patents

Abstract

The utility model relates to the technical field of valve components, in particular to a stroke limiting valve and a detection tool, which comprises a valve component and a limiting valve rod component; the valve component comprises a valve body and a valve sleeve arranged in the valve body in a sliding manner, a limiting structure used for limiting the movement stroke of the valve sleeve is also arranged in the valve body, and a first reset element is arranged between the valve sleeve and the valve body; the limit valve rod assembly comprises a fixed shaft fixedly connected with the valve body, the fixed shaft is rotatably connected with a pin shaft, the pin shaft is inserted into the valve body and used for shifting the valve sleeve, and a second reset element used for resetting the pin shaft is arranged between the fixed shaft and the pin shaft; the machining precision of the limiting valve rod assembly is detected through the detection tool, so that on one hand, the assembly precision is ensured, and the motion progress of a piston rod connected with the pin shaft is further ensured; on the other hand, the interference between the pin shaft valve rod and the valve sleeve is prevented.

Description

Stroke limiting valve and detection tool

Technical Field

The utility model relates to a valve member technical field, in particular to stroke limit valve and detection frock.

Background

The existing piston rod stroke limiting valve for controlling the hydraulic valve is reset through a spring, so that the deformation of a stroke limiting valve rod is easily caused, and the reset position is not accurate easily due to the force of the spring, so that the motion precision of a piston rod is influenced.

SUMMERY OF THE UTILITY MODEL

Rely on the low problem of spring reset precision alone in order to solve prior art existence, the utility model provides an improve the stroke limit valve of motion precision and be used for detecting the detection frock of the machining precision of the spacing valve rod of stroke.

The utility model provides a technical scheme that its technical problem adopted is:

a travel limit valve comprises a valve component and a limit valve rod component;

the valve component comprises a valve body and a valve sleeve arranged in the valve body in a sliding manner, a limiting structure used for limiting the movement stroke of the valve sleeve is also arranged in the valve body, and a first resetting element is arranged between the valve sleeve and the valve body;

the limiting valve rod assembly comprises a fixing shaft fixedly connected with the valve body, the fixing shaft is rotatably connected with a pin shaft, the pin shaft is inserted into the valve body and used for shifting the valve sleeve, and a second reset element used for resetting the pin shaft is arranged between the fixing shaft and the pin shaft.

Furthermore, a valve rod is fixed on the valve body, the valve sleeve is sleeved on the valve rod, and the limiting structure comprises a step arranged on the valve rod.

Furthermore, the fixed shaft is connected with the pin shaft through a connecting plate, the connecting plate is rotatably connected with the fixed shaft, and the pin shaft is fixedly connected with the connecting plate or integrally formed.

Further, the first return element is a spring.

Further, the second reset element is a double torsion spring. The bidirectional reset of the pin shaft can be realized by adopting the double torsion springs.

The utility model provides a detect frock for detect foretell spacing valve rod assembly's machining precision, includes the detection subject, the detection subject be equipped with the fixed axle matched through-hole, the detection subject still be equipped with and be used for detecting the detection portion of round pin axle for the machining precision of fixed axle.

Furthermore, the detection part comprises a detection end face which is arranged on one side of the detection main body and is used for being attached to the end face of the pin shaft.

Has the advantages that:

(1) The stroke limiting valve of the utility model is matched with the spring by arranging the pin shaft and the torsional spring, thereby improving the motion precision of the piston rod connected with the pin shaft;

(2) The machining precision of the limiting valve rod assembly is detected through the detection tool, so that on one hand, the assembly precision is ensured, and the motion progress of a piston rod connected with the pin shaft is further ensured; on the other hand, the pin valve rod and the valve sleeve are prevented from generating interference.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic perspective view of the travel limit valve of the present invention;

fig. 2 is a cross-sectional view of the travel limit valve of the present invention along the center line of the valve stem;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

FIG. 4 is a schematic structural view of a check valve stem assembly;

FIG. 5 is a cross-sectional view of a detection tool;

fig. 6 is a schematic diagram of a check valve stem assembly.

The detection tool comprises a valve component 1, a valve body 11, a valve body 12, a valve sleeve 13, a valve rod 131, a step 14, a spring 2, a limiting valve rod component 21, a fixing shaft 22, a pin shaft 23, a connecting plate 24, a double torsion spring 3, a detection tool 31, a detection main body 32, a through hole 33 and a detection end face.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be discussed further in subsequent figures.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

For ease of description, spatially relative terms such as "over 8230 \ 8230;,"' over 8230;, \8230; upper surface "," above ", etc. may be used herein to describe the spatial relationship of one device or feature to another device or feature as shown in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary terms "at 8230; \8230; 'above" may include both orientations "at 8230; \8230;' above 8230; 'at 8230;' below 8230;" above ". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.

Referring to fig. 1 to 4, a stroke limiting valve comprises a valve component 1 and a limiting valve rod component 2; the valve component 1 comprises a valve body 11 and a valve sleeve 12 arranged in the valve body 11 in a sliding manner, a limiting structure for limiting the movement stroke of the valve sleeve 12 is further arranged in the valve body 11, and a first resetting element is arranged between the valve sleeve 12 and the valve body 11; the first return element is a spring 14. The limiting valve rod assembly 2 comprises a fixed shaft 21 fixedly connected with the valve body 11, the fixed shaft 21 is rotatably connected with a pin shaft 22, the pin shaft 22 is inserted into the valve body 11 and used for shifting the valve sleeve 12, a second reset element used for resetting the pin shaft 22 is arranged between the fixed shaft 21 and the pin shaft 22, and the second reset element is a double torsion spring 24.

The valve body 11 is fixed with a valve rod 13, the valve sleeve 12 is sleeved on the valve rod 13, and the limiting structure comprises a step 131 arranged on the valve rod 13.

The fixed shaft 21 is connected with the pin shaft 22 through a connecting plate 23, the connecting plate 23 is rotatably connected with the fixed shaft 21, and the pin shaft 22 is fixedly connected with the connecting plate 23 or integrally formed.

In fig. 2, a pin 22 and a connecting plate 23 are illustrated as an integral form, although the pin 22 may be welded to the connecting plate 23, the pin 22 is connected to a piston rod of a hydraulic valve of a hydraulic system, and then the stroke of the piston rod is limited by the stroke of the pin 22, specifically, the left end of the pin in fig. 2 is connected to the piston rod, the hydraulic system may be a hydraulic system used in an agricultural machine, and the piston rod (or a valve core) of the hydraulic valve is additionally connected to an operating structure.

In order to make spacing valve rod assembly 2 after the welding when installing to valve assembly 1, do not assemble the problem of interfering to the inside core spare of valve assembly 1 (valve rod 13 and valve barrel 12), like fig. 5 ~ 6, the utility model provides a detect frock 3 for detect foretell spacing valve rod assembly 2's machining precision, carry out strict the accuse to spacing valve rod assembly 2 welding. The detection device comprises a detection main body 31, wherein the detection main body 31 is provided with a through hole 32 matched with the fixed shaft 21, and the detection main body 31 is also provided with a detection part for detecting the processing precision of the pin shaft 22 relative to the fixed shaft 21. The detection portion can be the form of through-hole, also can be other forms, the utility model discloses in, the detection portion is used for and the detection terminal surface 33 of the laminating of round pin axle 22 terminal surface including setting up in detecting main part 31 one side. When the fixed shaft 21 is inserted into the through hole 32 and the mounting member on the fixed shaft 21 abuts against the detection body 31 (simulating the mounting position of the fixed shaft 21 and the valve body 11 of the stroke limiting valve), if the end surface of the pin 22 is attached to the detection end surface 33, the processing of the limiting valve rod assembly 2 is qualified.

Above, only be the embodiment of the preferred of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the design of the present invention, equivalent replacement or change should be included in the protection scope of the present invention.

Claims (7)

1. A stroke limit valve is characterized in that:

comprises a valve component (1) and a limiting valve rod component (2);

the valve component (1) comprises a valve body (11) and a valve sleeve (12) arranged in the valve body (11) in a sliding mode, a limiting structure used for limiting the movement stroke of the valve sleeve (12) is further arranged in the valve body (11), and a first resetting element is arranged between the valve sleeve (12) and the valve body (11);

the limiting valve rod assembly (2) comprises a fixing shaft (21) fixedly connected with the valve body (11), the fixing shaft (21) is rotatably connected with a pin shaft (22), the pin shaft (22) is inserted into the valve body (11) and used for shifting the valve sleeve (12), and a second resetting element used for resetting the pin shaft (22) is arranged between the fixing shaft (21) and the pin shaft (22).

2. The travel limit valve of claim 1, wherein: the valve body (11) on be fixed with valve rod (13), valve barrel (12) cover on valve rod (13), limit structure is including setting up step (131) on valve rod (13).

3. The travel limit valve of claim 1, wherein: the fixed shaft (21) is connected with the pin shaft (22) through a connecting plate (23), the connecting plate (23) is rotatably connected with the fixed shaft (21), and the pin shaft (22) is fixedly connected with the connecting plate (23) or integrally formed.

4. The travel limit valve of claim 1, wherein: the first return element is a spring (14).

5. The travel limit valve of claim 1, wherein: the second reset element is a double torsion spring (24).

6. The utility model provides a detect frock which characterized in that: the limiting valve rod assembly (2) for detecting the machining accuracy comprises a detecting body (31), wherein the detecting body (31) is provided with a through hole (32) matched with the fixed shaft (21), and the detecting body (31) is further provided with a detecting part for detecting the machining accuracy of the pin shaft (22) relative to the fixed shaft (21).

7. The detection tool according to claim 6, wherein: the detection part comprises a detection end face (33) which is arranged on one side of the detection main body (31) and is used for being attached to the end face of the pin shaft (22).

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