Clamping device for valve seat grinding

Abstract

The utility model relates to the technical field of valve seat machining equipment, in particular to a clamping device for valve seat grinding, which comprises a fixed mounting seat, a movable mounting seat and a chuck, the movable mounting seat is arranged below the fixed mounting seat, the chuck is arranged below the movable mounting seat, and a first connecting piece is rotatably mounted on the fixed mounting seat. A first connecting piece is rotatably mounted on the fixed mounting seat, a second connecting piece is rotatably mounted on the movable mounting seat, the first connecting piece and the second connecting piece are connected through a shaft sleeve and can move relatively in the axial direction, the chuck is fixedly connected to the lower end of the second connecting piece, and a pressure adjusting mechanism is arranged between the fixed mounting seat and the movable mounting seat. The chuck is mounted through the first connecting piece, the second connecting piece and the shaft sleeve, so that the chuck can rotate relative to the mounting seat and can axially move, and the requirements of valve seat grinding and pressure adjustment are met.

Description

Technical Field

[0001] The utility model relates to the technical field of valve seat processing equipment, in particular to a clamping device for grinding a valve seat. Background Art

[0002] In the production line of pump and valve enterprises, the valve core and valve seat grinding process is to fix the valve core on an automatically rotating workbench, apply grinding fluid on the grinding surface of the valve seat, and have the worker hold the valve seat and press it on the surface of the rotating valve core for several minutes of grinding. The human arm cannot accurately control the grinding pressure applied to the contact surface of the valve core and the valve seat, resulting in poor final grinding effect. The air tightness of the produced pumps and valves does not meet the requirements, and there are great production safety risks when the hand-held valve seat is pressed on the rotating valve core.

[0003] The Chinese utility model patent with authorization announcement number CN208262567U discloses a valve seat grinding and clamping clamp with adjustable positive pressure, including an upper mounting plate and a lower mounting plate arranged in parallel, a clamping mechanism for clamping the valve seat is installed below the lower mounting plate, a rotating wheel that can be raised and lowered along the axial direction is installed at the position of the upper mounting plate corresponding to the clamping mechanism, and an elastic member is provided between the rotating wheel and the clamping mechanism, which respectively contacts the two and passes through the lower mounting plate. However, the clamp rotates with the valve seat as a whole during grinding, has a large rotational inertia, and is inconvenient to adjust the pressure during the grinding process. Utility Model Content

[0004] The utility model aims to provide a clamping device for grinding a valve seat to solve the problems raised by the background technology.

[0005] The above-mentioned purpose of the utility model is achieved through the following technical solutions: a clamping device for valve seat grinding, comprising: a fixed mounting seat, a movable mounting seat arranged below the fixed mounting seat and a chuck arranged below the movable mounting seat, a first connecting member is rotatably mounted on the fixed mounting seat, a second connecting member is rotatably mounted on the movable mounting seat, the first connecting member and the second connecting member are connected by a shaft sleeve and the two can move axially relative to each other, the chuck is fixedly connected to the lower end of the second connecting member, and a pressure regulating mechanism is arranged between the fixed mounting seat and the movable mounting seat.

[0006] Preferably, the pressure regulating mechanism includes an upper support seat fixed on the fixed mounting seat, a lower support seat fixed on the movable mounting seat, a rotation adjustment seat screwed on the outer side of the upper support seat, and a first spring connected between the rotation adjustment seat and the lower support seat.

[0007] Preferably, the middle parts of the upper support seat and the lower support seat are both provided with through holes, and the first connecting member and the second connecting member are inserted into the corresponding through holes.

[0008] Preferably, the upper support seat and the lower support seat are both T-shaped structures and are coaxially arranged with the first connecting member and the second connecting member.

[0009] Preferably, an axially through-hole is provided in the shaft sleeve, and the first connecting member and the second connecting member are both inserted into the hole.

[0010] Preferably, a second spring is provided at at least one end of the sleeve, one end of the second spring presses against the end of the sleeve, and the other end presses against the first connecting member or the second connecting member.

[0011] Preferably, guide rods are connected between the fixed mounting seat and the movable mounting seat, and the guide rods are evenly distributed around the circumference.

[0012] Preferably, the lower end of the guide rod is movably inserted into the movable mounting seat, and a first nut and a second nut are screwed onto the guide rod, the first nut and the second nut are respectively arranged on the upper and lower sides of the movable mounting seat, and a third spring is connected between the first nut and the movable mounting seat.

[0013] Beneficial effects of the utility model:

[0014] The utility model installs the chuck by means of the first connecting piece, the second connecting piece and the shaft sleeve, so that the chuck can rotate relative to the mounting seat and can move axially, thus meeting the requirements of valve seat grinding and pressure regulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0016] Figure 2 It is a cross-sectional view of Example 1 of the utility model;

[0017] Figure 3 This is a schematic diagram of the installation of the shaft sleeve in Embodiment 2 of the present utility model;

[0018] In the figure: 1-fixed mounting seat, 2-movable mounting seat, 3-chuck, 4-first connecting piece, 5-second connecting piece, 6-sleeve, 7-pressure adjustment mechanism, 701-upper support seat, 702-lower support seat, 703-rotation adjustment seat, 704-first spring, 8-second spring, 9-guide rod, 10-first nut, 11-second nut, 12-third spring. DETAILED DESCRIPTION

[0019] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0020] This specific embodiment is merely an explanation of the present utility model, and it is not a limitation of the present utility model. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but as long as it is within the scope of the claims of the present utility model, it shall be protected by the patent law. Embodiment 1:

[0021] like Figure 1 and Figure 2 As shown, a clamping device for valve seat grinding includes: a fixed mounting seat 1, a movable mounting seat 2 arranged below the fixed mounting seat 1, and a chuck 3 arranged below the movable mounting seat 2, a first connecting member 4 is rotatably mounted on the fixed mounting seat 1, a second connecting member 5 is rotatably mounted on the movable mounting seat 2, the first connecting member 4 and the second connecting member 5 are connected to each other through a shaft sleeve 6 and the two can move axially relative to each other, the chuck 3 is fixedly connected to the lower end of the second connecting member 5, wherein the chuck 3 is a conventional three-jaw chuck, and the first connecting member 4 and the second connecting member 5 are respectively mounted on the fixed mounting seat 1 and the movable mounting seat 2 through bearings.

[0022] An axially through-hole is provided in the shaft sleeve 6, and the first connecting member 4 and the second connecting member 5 are both inserted in the hole. The hole is a spline hole or a regular polygon hole, and the cross-sectional shape of the first connecting member 4 and the second connecting member 5 matches the shape of the hole.

[0023] A pressure regulating mechanism 7 is arranged between the fixed mounting seat 1 and the movable mounting seat 2. The pressure regulating mechanism 7 includes an upper support seat 701 fixed on the fixed mounting seat 1, a lower support seat 702 fixed on the movable mounting seat 2, a rotating adjustment seat 703 screwed on the outer side of the upper support seat 701, and a first spring 704 connected between the rotating adjustment seat 703 and the lower support seat 702.

[0024] A through hole is provided in the middle of the upper support seat 701 and the lower support seat 702, and the first connecting member 4 and the second connecting member 5 are inserted into the corresponding through holes.

[0025] The upper support seat 701 and the lower support seat 702 are both T-shaped structures and are coaxially arranged with the first connecting member 4 and the second connecting member 5 .

[0026] A guide rod 9 is connected between the fixed mounting seat 1 and the movable mounting seat 2, and the guide rods 9 are evenly distributed around the circumference.

[0027] The upper end of the guide rod 9 is fixed on the fixed mounting seat 1, and the lower end of the guide rod 9 is movably inserted into the movable mounting seat 2. A first nut 10 and a second nut 11 are screwed on the guide rod 9. The first nut 10 and the second nut 11 are respectively arranged on the upper and lower sides of the movable mounting seat 2. A third spring 12 is connected between the first nut 10 and the movable mounting seat 2.

[0028] During grinding, the chuck 3 clamps the valve seat, the valve seat presses the valve core downward, and then the rotary adjustment seat 703 is rotated to adjust the pressure between the valve seat and the valve core. Then the transmission shaft is connected to the first connecting piece 4, and the second connecting piece 5, the chuck 3 and the valve seat are driven to rotate through the shaft sleeve 6. Embodiment 2:

[0029] like Figure 3 As shown, a second spring 8 is provided at the upper end of the sleeve 6, one end of the second spring 8 presses against the end of the sleeve 6, and the other end presses against the first connecting member 4, so as to prevent the sleeve 6 from axial movement. Embodiment 3:

[0030] The difference from Embodiment 2 is that a second spring 8 is provided at the upper end of the sleeve 6 , one end of the second spring 8 presses against the end of the sleeve 6 , and the other end presses against the second connecting member 5 .

Claims

1. A clamping device for valve seat grinding, comprising: A fixed mounting seat (1), a movable mounting seat (2) arranged below the fixed mounting seat (1), and a chuck (3) arranged below the movable mounting seat (2), characterized in that a first connecting member (4) is rotatably mounted on the fixed mounting seat (1), a second connecting member (5) is rotatably mounted on the movable mounting seat (2), the first connecting member (4) and the second connecting member (5) are connected to each other via a shaft sleeve (6) and the two can move axially relative to each other, the chuck (3) is fixedly connected to the lower end of the second connecting member (5), and a pressure regulating mechanism (7) is arranged between the fixed mounting seat (1) and the movable mounting seat (2).

2. A valve seat grinding clamping device according to claim 1, characterized in that: The pressure regulating mechanism (7) comprises an upper support seat (701) fixed on the fixed mounting seat (1), a lower support seat (702) fixed on the movable mounting seat (2), a rotation adjustment seat (703) screwed to the outside of the upper support seat (701), and a first spring (704) connected between the rotation adjustment seat (703) and the lower support seat (702).

3. A valve seat grinding clamping device according to claim 2, characterized in that: The middle parts of the upper support seat (701) and the lower support seat (702) are both provided with through holes, and the first connecting member (4) and the second connecting member (5) are inserted into the corresponding through holes.

4. A valve seat grinding clamping device according to claim 3, characterized in that: The upper support seat (701) and the lower support seat (702) are both T-shaped structures, and are coaxially arranged with the first connecting member (4) and the second connecting member (5).

5. The valve seat grinding clamping device according to claim 1, characterized in that: The shaft sleeve (6) is provided with an axially penetrating sleeve hole, and the first connecting member (4) and the second connecting member (5) are both inserted into the sleeve hole.

6. A valve seat grinding clamping device according to claim 5, characterized in that: At least one end of the shaft sleeve (6) is provided with a second spring (8), one end of the second spring (8) presses against the end of the shaft sleeve (6), and the other end presses against the first connecting member (4) or the second connecting member (5).

7. A valve seat grinding clamping device according to claim 1, characterized in that: A guide rod (9) is connected between the fixed mounting seat (1) and the movable mounting seat (2), and the guide rods (9) are evenly distributed around the circumference.

8. A valve seat grinding clamping device according to claim 7, characterized in that: The lower end of the guide rod (9) is movably inserted into the movable mounting seat (2); a first nut (10) and a second nut (11) are screwed onto the guide rod (9); the first nut (10) and the second nut (11) are respectively arranged on upper and lower sides of the movable mounting seat (2); a third spring (12) is connected between the first nut (10) and the movable mounting seat (2).

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