Machining jig for valve seat

Abstract

The utility model relates to the field of clamps, and particularly discloses a machining jig for a valve seat, which comprises a three-jaw chuck, a sliding groove is arranged on the upper surface of the three-jaw chuck, a sliding block is arranged in the sliding groove, a limiting mechanism is arranged above the sliding block, the limiting mechanism comprises an outer sleeve and an extension pull rod, a pressing sheet is arranged at the upper end of the extension pull rod, and a clamping groove is arranged on the outer sleeve. A position adjusting sliding groove is formed in the outer side of the outer sleeve, a spring is installed at the position, located in the outer sleeve, of the lower end of the extension pull rod, a press-fit bolt is arranged at the position, located in the position adjusting sliding groove, of the outer side of the lower end of the extension pull rod, and a mountain-shaped pressing plate is installed on the outer side of the press-fit bolt. The pressing piece at the end of the extension pull rod is integrally pressed at the upper end of the valve seat, so that the pressing gasket on the outer side of the pressing bolt is integrally pressed on the mountain-shaped pressing plate to be extruded on the outer side of the outer sleeve, the outer sleeve and the extension pull rod are positioned, and the extension pull rod can be fixed under the action of a clamping protrusion and a limiting mechanism. And transverse and longitudinal limiting treatment is realized.

Description

Technical Field

[0001] This utility model relates to the field of fixtures, specifically a machining fixture for valve seats. Background Technology

[0002] The valve seat is a detachable component inside the valve, used to support the valve core in the fully closed position and form a sealing pair. Generally, the valve seat diameter is the maximum flow diameter of the valve. The length and outer diameter of the valve seat vary, and a three-jaw chuck is usually used to position the valve seat during processing.

[0003] However, when using a three-jaw chuck to position a valve seat with a long length, the contact area between the chuck's jaws and the valve seat is limited, which can easily lead to loosening of the clamp. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a machining fixture for valve seats, thus solving the problems mentioned in the background.

[0005] This utility model provides the following technical solution: a machining fixture for valve seats, including a three-jaw chuck, a groove is formed on the upper surface of the three-jaw chuck, a slider is installed inside the groove, a limiting mechanism is provided above the slider, the limiting mechanism includes: an outer tube and an extension rod, a pressure plate is installed at the upper end of the extension rod, an adjustment groove is formed on the outer side of the outer tube, a spring is installed at the lower end of the extension rod inside the outer tube, a pressing bolt is provided at the outer side of the lower end of the extension rod inside the adjustment groove, and a mountain-shaped pressure plate is installed on the outer side of the pressing bolt.

[0006] As a further improvement of this utility model: a pressing washer is installed on one side of the mountain-shaped pressing plate on the pressing bolt, and an adjustment thread is provided on the lower outer side of the outer sleeve.

[0007] As a further improvement of this utility model: the upper surface of the slider is provided with a snap-fit ​​protrusion, and the upper surface of the snap-fit ​​protrusion is provided with a mounting screw hole corresponding to the position of the outer sleeve.

[0008] As a further improvement of this utility model, the mountain-shaped pressure plate is movably connected to the pressing bolt.

[0009] As a further embodiment of this utility model: the spring is fixedly connected to the outer sleeve and the extension rod, and the pressure plate is fixedly connected to the extension rod.

[0010] As a further improvement of this utility model, the pressing gasket is fixedly connected to the pressing bolt.

[0011] As a further embodiment of this utility model: the slider is slidably connected to the slide groove, a drive gear plate is installed below the slider inside the three-jaw chuck, and an adjustment socket is installed below the slide groove outside the three-jaw chuck.

[0012] As a further improvement of this utility model: the outer sleeve is movably connected to the mounting screw hole through the adjusting thread, and the snap-fit ​​protrusion is fixedly connected to the slider.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] By pressing the pressure plate at the end of the extension rod onto the upper part of the valve seat, the pressure pad on the outside of the pressure bolt is pressed against the mountain-shaped pressure plate on the outside of the outer sleeve, thereby positioning the outer sleeve and the extension rod. In conjunction with the snap-fit ​​protrusion and the limiting mechanism, lateral and longitudinal limiting are achieved.

[0015] By pulling the extension rod from the inside to the outside of the outer sleeve, the control spring is stretched and deformed. Then, the pressure plate at the end of the extension rod is pressed against the upper position of the valve seat, which can adjust the limiting mechanism to limit the valve seat at different heights. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a machining fixture for valve seats;

[0017] Figure 2 This is a schematic diagram of a limiting mechanism in a machining fixture for valve seats;

[0018] Figure 3 An exploded view of a limiting mechanism in a machining fixture for a valve seat;

[0019] Figure 4 A top view of a three-jaw chuck in a machining fixture for valve seats;

[0020] Figure 5 This is a front view of a three-jaw chuck in a machining fixture for valve seats.

[0021] In the diagram: 1. Three-jaw chuck; 2. Slide groove; 3. Slider; 4. Adjustment socket; 5. Limiting mechanism; 301. Snap-fit ​​protrusion; 302. Mounting screw hole; 501. Outer sleeve; 502. Extension rod; 503. Pressure plate; 504. Adjustment thread; 505. Adjustment slide groove; 506. Mountain-shaped pressure plate; 507. Pressing bolt; 508. Pressing washer; 509. Spring. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] like Figure 1-5 As shown, this embodiment provides a machining fixture for a valve seat, including a three-jaw chuck 1. A groove 2 is formed on the upper surface of the three-jaw chuck 1, and a slider 3 is installed inside the groove 2. A limiting mechanism 5 is provided above the slider 3. The limiting mechanism 5 includes an outer sleeve 501 and an extension rod 502. A pressure plate 503 is installed at the upper end of the extension rod 502, and the pressure plate 503 is fixedly connected to the extension rod 502. An adjustment groove 505 is formed on the outer side of the outer sleeve 501, and the lower end of the extension rod 502 is located at the outer sleeve 501. A spring 509 is installed inside the 1. The spring 509 is fixedly connected to the outer sleeve 501 and the extension rod 502. The lower outer side of the extension rod 502 is located inside the adjustment groove 505 and a pressing bolt 507 is provided. A mountain-shaped pressure plate 506 is installed on the outside of the pressing bolt 507. The mountain-shaped pressure plate 506 is movably connected to the pressing bolt 507. The slider 3 is slidably connected to the groove 2. A drive gear plate is installed below the slider 3 inside the three-jaw chuck 1. An adjustment socket 4 is installed below the groove 2 outside the three-jaw chuck 1.

[0024] like Figure 2-3 As shown, in this embodiment, a pressing washer 508 is installed on the pressing bolt 507 on one side of the mountain-shaped pressing plate 506. The pressing washer 508 is fixedly connected to the pressing bolt 507. An adjusting thread 504 is provided on the lower outer side of the outer sleeve 501. A snap-fit ​​protrusion 301 is installed on the upper surface of the slider 3. A mounting screw hole 302 is opened on the upper surface of the snap-fit ​​protrusion 301 corresponding to the position of the outer sleeve 501. The outer sleeve 501 is movably connected to the mounting screw hole 302 through the adjusting thread 504. The snap-fit ​​protrusion 301 is fixedly connected to the slider 3.

[0025] The working principle of this utility model is as follows: When in use, the valve seat to be limited is placed above the three-jaw chuck 1. A torque is applied to the adjusting socket 4, causing the bevel gear inside the adjusting socket 4 to mesh with the gear plate inside the three-jaw chuck 1, driving the slider 3 to slide inside the groove 2. The locking protrusion 301 on the upper surface of the slider 3 contacts the inner wall of the valve seat. When the valve seat to be positioned and clamped is long, the limiting mechanism 5 can be installed in the mounting screw hole 3 by engaging the adjusting threads 504 on the lower outer side of the outer sleeve 501. Inside 02, by pulling the extension rod 502 outward from the inside of the outer sleeve 501, the control spring 509 is stretched and deformed. Then, the pressure plate 503 at the end of the extension rod 502 is pressed onto the upper end of the valve seat. Then, by applying torque to the pressing bolt 507, the pressing pad 508 on the outside of the pressing bolt 507 is pressed onto the mountain-shaped pressure plate 506 on the outside of the outer sleeve 501, thereby achieving the positioning of the outer sleeve 501 and the extension rod 502. In conjunction with the action of the snap-fit ​​protrusion 301 and the limiting mechanism 5, the lateral and longitudinal limiting processes are achieved.

[0026] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A machining fixture for valve seats, comprising a three-jaw chuck (1), characterized in that, The upper surface of the three-jaw chuck (1) is provided with a sliding groove (2), and a slider (3) is installed inside the sliding groove (2). A limiting mechanism (5) is provided above the slider (3). The limiting mechanism (5) includes: an outer tube (501) and an extension rod (502). A pressure plate (503) is installed at the upper end of the extension rod (502). An adjustment groove (505) is provided on the outer side of the outer tube (501). A spring (509) is installed at the lower end of the extension rod (502) inside the outer tube (501). A pressing bolt (507) is provided at the lower end of the extension rod (502) inside the adjustment groove (505). A mountain-shaped pressure plate (506) is installed on the outer side of the pressing bolt (507).

2. A machining fixture for a valve seat according to claim 1, characterized in that, A pressing washer (508) is installed on the pressing bolt (507) on one side of the mountain-shaped pressing plate (506), and an adjustment thread (504) is provided on the lower outer side of the outer sleeve (501).

3. A machining fixture for a valve seat according to claim 2, characterized in that, The upper surface of the slider (3) is provided with a snap-fit ​​protrusion (301), and the upper surface of the snap-fit ​​protrusion (301) is provided with a mounting screw hole (302) corresponding to the position of the outer sleeve (501).

4. A machining fixture for a valve seat according to claim 1, characterized in that, The mountain-shaped pressure plate (506) is movably connected to the pressing bolt (507).

5. A machining fixture for a valve seat according to claim 1, characterized in that, The spring (509) is fixedly connected to the outer tube (501) and the extension rod (502), and the pressure plate (503) is fixedly connected to the extension rod (502).

6. A machining fixture for a valve seat according to claim 2, characterized in that, The pressing gasket (508) is fixedly connected to the pressing bolt (507).

7. A machining fixture for a valve seat according to claim 1, characterized in that, The slider (3) is slidably connected to the slide groove (2). A drive gear plate is installed below the slider (3) inside the three-jaw chuck (1). An adjustment socket (4) is installed below the slide groove (2) outside the three-jaw chuck (1).

8. A machining fixture for a valve seat according to claim 3, characterized in that, The outer sleeve (501) is movably connected to the mounting screw hole (302) through the adjusting thread (504), and the snap-fit ​​protrusion (301) is fixedly connected to the slider (3).

Images