Clamp for grinding outer wall of valve seat

Abstract

The utility model discloses a clamp for polishing the outer wall of a valve seat. The clamp comprises a mounting part, a first rotating disc, a motor, a sleeve rod, a movable stop block, a first connecting arm, a second connecting arm and a connecting piece. Firstly, the movable check block is detached from the loop bar; then the sleeve rod is sleeved with the multiple valve seats, and the first side valve seat abuts against the fixing check block; then the movable check block is connected to the sleeve rod, the connecting position of the movable check block on the sleeve rod is adjusted, the movable check block abuts against the second side valve seat, and the valve seats are fixed to the sleeve rod. After the multiple valve seats are installed on the loop bar, the loop bar is placed between the two tips. And the movable part is moved, so that the two tips enter the two first hole positions of the sleeve rod. And the locking component limits the sliding of the movable part on the guide rail, so that the loop bar is stably supported by the two tips. The connecting piece is connected with the second end of the first connecting arm and the second end of the second connecting arm. The motor drives the first rotating disc to rotate to drive the sleeve rod and the multiple valve seats fixed to the sleeve rod to rotate together, and the surfaces of the valve seats are ground together.

Description

Technical Field

[0001] This utility model relates to valve seat processing, and in particular to a fixture for grinding the outer wall of a valve seat. Background Technology

[0002] The valve ball and valve seat are used together in an impactor. During relative upward movement, the oil pushes the valve ball upwards and enters; during relative downward movement, the oil acts downwards on the valve ball, causing it to press against the valve seat, achieving a seal. The valve seat is generally annular in shape, and its outer wall needs to be ground during manufacturing. Correspondingly, a fixture is required to hold the valve seat in place.

[0003] Currently, a three-jaw chuck is generally used as a clamp. The three jaws of the three-jaw chuck extend into the valve seat, open up to press against the inner ring of the valve seat, fix the valve seat, drive the valve seat to rotate, and engage with the grinding wheel to polish the surface of the valve seat.

[0004] The existing fixtures still have the following problems: the three-jaw chuck fixes one valve seat at a time, which makes it inconvenient to disassemble and install the valve seat and results in relatively low processing efficiency. Utility Model Content

[0005] This application provides a fixture for grinding the outer wall of a valve seat, which can solve the problems mentioned in the background art.

[0006] This application provides a fixture for grinding the outer wall of a valve seat, comprising:

[0007] The mounting section includes: a fixed part and a movable part that can be horizontally adjusted relative to the fixed part; both the fixed part and the movable part are fixedly provided with a center point.

[0008] The first turntable is rotatably connected to the fixed part; it is ring-shaped and allows the tip of the fixed part to pass through.

[0009] The motor drives the first turntable to rotate;

[0010] The sleeve has a fixed stop at the first end; both end faces have first holes for the support of the center points, so that the sleeve can be detachably connected between the two center points.

[0011] The movable stop is detachably connected to the second end of the sleeve rod, and its connection position can be adjusted along the axial direction of the sleeve rod.

[0012] The first connecting arm is fixedly connected to the sleeve rod at its first end;

[0013] The second connecting arm is hinged to the first turntable at its first end;

[0014] A connector connects the second end position of the first connecting arm and the second end position of the second connecting arm; at least one of the connection between the connector and the first connecting arm, and the connection between the connector and the second connecting arm, can be disengaged.

[0015] In some embodiments, the second end of the first connecting arm has a first socket for inserting a connector; the connector can be horizontally adjusted to a fixed position on the second connecting arm so that the connector can be inserted into or removed from the first socket.

[0016] In some embodiments, the first insertion hole is a through hole; the connector includes: a first threaded section threaded to the second connecting arm and a first smooth section that mates with the first insertion hole.

[0017] In some embodiments, the locking component of the movable part includes: a second turntable, two clamping blocks, and a stud; the second turntable is rotatably connected to the movable part about a vertical axis; the two clamping blocks are horizontally and longitudinally slidably connected to the movable part, and a slotted pin pair is provided between the second turntable and the movable part; the stud is threadedly connected to the movable part and has only vertical movement freedom between the second turntable and the movable part.

[0018] In some embodiments, the fixed part has a connecting post, the end face of the connecting post has a second hole for fixed connection of the top, and the outer wall of the connecting post is connected to a bearing for rotational connection of the first turntable.

[0019] In some embodiments, the movable stop is threaded to the sleeve.

[0020] In summary, this application discloses a fixture for grinding the outer wall of valve seats, comprising: a mounting part, a first turntable, a motor, a sleeve rod, a movable stop, a first connecting arm, a second connecting arm, and a connecting member. First, the movable stop is removed from the sleeve rod; then, multiple valve seats are fitted onto the sleeve rod, with the first-side valve seats abutting against the fixed stop; next, the movable stop is connected to the sleeve rod, and its connection position on the sleeve rod is adjusted so that it abuts against the second-side valve seats, thus fixing these valve seats to the sleeve rod. After the multiple valve seats are installed on the sleeve rod, the sleeve rod is placed between two centers. The movable part is moved so that the two centers enter the two first holes on the sleeve rod. A locking member restricts the sliding of the movable part on the guide rail, ensuring that the sleeve rod is stably supported and held by the two centers. The connecting member connects the second end position of the first connecting arm and the second end position of the second connecting arm. The motor drives the first turntable to rotate, causing the sleeve rod and the multiple valve seats fixed on the sleeve rod to rotate together, thus grinding the surface of these valve seats together. The beneficial effects include the ability to simultaneously polish the surfaces of multiple valve seats, thus improving efficiency. Attached Figure Description

[0021] To better illustrate the technical solutions in the embodiments of this application or the background art, the accompanying drawings used in the embodiments of this application or the background art will be described below.

[0022] Figure 1 This is a schematic diagram of the present application;

[0023] Figure 2 for Figure 1 An enlarged schematic diagram of part A in the middle;

[0024] Figure 3 A schematic diagram of the sleeve, fixed stop, and first connecting arm;

[0025] Figure 4 This is a top view of this application;

[0026] Figure 5 A schematic diagram of the installation of the first turntable and the top of the fixed part;

[0027] Figure 6 for Figure 4 Sectional view along the middle AA;

[0028] Figure 7 This is a schematic diagram of a slotted pin pair.

[0029] In the picture,

[0030] 1. Mounting part; 11. Fixed part; 11a. Connecting post; 12. Moving part;

[0031] 2. First turntable; 21. First part; 22. Second part;

[0032] 3. Electric motor;

[0033] 4. Sleeve rod; 4a. Fixed stop block;

[0034] 5. Movable stop;

[0035] 6. First connecting arm; 6a. First socket;

[0036] 7. Second connecting arm;

[0037] 8. Connectors;

[0038] 9. Locking component; 91. Second turntable; 91a. Connecting shaft; 91b. Guide groove; 92. Two clamping blocks; 92a. Linear guide rail; 92b. Pin; 93. Stud; 93a. Second nut;

[0039] 30. Guide rail; 31. Center point; 32. Bearing; 33. Shaft. Detailed Implementation

[0040] The following description is provided in conjunction with the accompanying drawings, which are for illustrative purposes only and not strictly to scale. Unless otherwise defined, the technical or scientific terms used in this disclosure should be understood in their ordinary sense by one of ordinary skill in the art to which this disclosure pertains. The terms "first," "second," and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described object changes. Unless otherwise specified, the embodiments in this application can be combined with each other.

[0041] Please see Figure 1 and Figure 4 A fixture for grinding the outer wall of a valve seat includes: a mounting part 1, a first turntable 2, a motor 3, a sleeve rod 4, a movable stop 5, a first connecting arm 6, a second connecting arm 7, and a connecting piece 8.

[0042] Mounting part 1 includes: a fixed part 11 and a movable part 12. The movable part 12 can be adjusted in position horizontally relative to the fixed part 11. That is, the fixed part 11 has a guide rail 30 for the movable part 12 to slide horizontally. The movable part 12 has a locking member 9 for restricting the sliding of the movable part 12 on the guide rail 30.

[0043] Both the fixed part 11 and the movable part 12 are fixedly equipped with a top 31.

[0044] In some embodiments, the locking member 9 may include a bolt and a square nut. The guide rail 30 has a convex groove, the square nut is located in the wider portion below the convex groove and is restricted from rotation, and the bolt is threaded to the square nut through the movable portion 12.

[0045] Please see Figure 6 and Figure 7 In some embodiments, the locking member 9 may include: a second turntable 91, two clamping blocks 92, and a stud 93.

[0046] The second turntable 91 is rotatably connected to the movable part 12 about a vertical axis. More specifically, the top surface of the second turntable 91 is fixed with a connecting shaft 91a, which is rotatably connected to the movable part 12 about a vertical axis via two bearings.

[0047] Two clamping blocks 92 are horizontally and longitudinally slidably connected to the movable part 12. More specifically, a linear guide rail 92a is provided between the clamping blocks and the movable part 12. A slotted pin pair is provided between the two clamping blocks 92 and the second turntable 91, that is, the second turntable 91 has two guide grooves 91b, and the distances from each position of the guide grooves 91b to the axis of the second turntable 91 are not equal; the clamping blocks are fixed with pins 92b that are inserted into the guide grooves 91b; the slotted pin pair is used to convert the rotation of the second turntable 91 into the movement of the two clamping blocks 92.

[0048] The stud 93 is threadedly connected to the movable part 12. More specifically, a second nut 93a is fixedly connected to the top surface of the movable part 12, and the second nut 93a is threadedly connected to the stud 93. The stud 93 and the second turntable 91 have only vertical movement freedom. More specifically, the stud 93 consists of a second threaded section and a second smooth section. The second threaded section is used for threaded connection with the second nut 93a, and the cross-section of the second smooth section is square. The upper end face of the connecting shaft 91a has a second insertion hole, the shape of which matches the second smooth section for insertion.

[0049] The portion of the stud 93 extending beyond the second nut 93a can be fixed with a handle. Rotating the stud 93 by a certain angle causes the second turntable 91 to rotate, which in turn causes the two clamping blocks 92 to move, thereby clamping / releasing the guide rail 30.

[0050] Compared to the locking component 9 composed of bolts and square nuts, it is simpler and more convenient to operate. When the locking component 9 restricts the sliding of the movable part 12 on the guide rail 30, the tip 31 of the movable part 12 is less likely to deviate.

[0051] Please see Figure 1 and Figure 2 The first turntable 2 is rotatably connected to the fixed part 11. The first turntable 2 is annular, through which the tip 31 of the fixed part 11 passes.

[0052] Please see Figure 5In some embodiments, the connection between the first turntable 2 and the tip 31 in the fixed portion 11 can be as follows: the fixed portion 11 has a connecting post 11a, the end face of the connecting post 11a has a second hole for the tip 31 to be fixedly connected, and the outer wall of the connecting post 11a is connected to a bearing 32 for the first turntable 2 to be rotatably connected. More specifically, the connecting post 11a is stepped, and the second hole is a through hole. There are two bearings 32, and a connecting sleeve is added between the two bearings 32 to fit together on the connecting post 11a, with the inner ring of the first bearing 32 abutting against the shoulder of the connecting post 11a. The tip 31 is inserted into the connecting post 11a and abuts against the inner ring of the second bearing 32. The part of the tip 31 that protrudes from the first side of the connecting post 11a is threadedly connected to a first nut, which is used to fix the tip 31 to the connecting post 11a. The first turntable 2 includes: a first portion 21 with a stepped hole and fitted onto the two bearings 32, and a second portion 22 threadedly connected to the inner wall of the first portion 21 and having a turntable. The outer ring of the first bearing 32 abuts against the transition plane of the stepped hole, and the second part 22 abuts against the outer ring of the second bearing 32.

[0053] Please see Figure 1 and Figure 5 The motor 3 drives the first turntable 2 to rotate. More specifically, the fixed part 11 is rotatably connected to the rotating shaft 33 around the horizontal axis, and a first belt drive is provided between the first turntable 2 and the rotating shaft 33; the motor 3 is fixedly connected to the fixed part 11, and a second belt drive is provided between the output shaft of the motor 3 and the rotating shaft 33.

[0054] Please see Figure 3 and Figure 4 Both end faces of the sleeve rod 4 have first holes for the support of the center point 31, allowing the sleeve rod 4 to be detachably connected between the two center points 31. In the connected state, the first end of the sleeve rod 4 corresponds to the first turntable 2.

[0055] Please see Figure 3 The first end of the sleeve 4 has a fixed stop 4a.

[0056] The movable stop 5 is detachably connected to the second end of the sleeve rod 4. The movable stop 5 can also be adjusted in position along the axial direction of the sleeve rod 4.

[0057] First, remove the movable stop 5 from the sleeve rod 4; then, insert multiple valve seats into the sleeve rod 4, with the first valve seat abutting against the fixed stop 4a; then, connect the movable stop 5 to the sleeve rod 4; finally, adjust the connection position of the movable stop 5 in the sleeve rod 4 so that the movable stop 5 abuts against the second valve seat, thus fixing these valve seats to the sleeve rod 4.

[0058] In some embodiments, the connection between the movable stop 5 and the sleeve 4 can be that the movable stop 5 is threadedly connected to the sleeve 4. More specifically, the sleeve 4 is sleeve-shaped, with a smaller portion being a third threaded section for the movable stop 5 to be threadedly connected.

[0059] Please see Figure 1 and Figure 7 The first end of the first connecting arm 6 is fixedly connected to the sleeve rod 4. The first end of the second connecting arm 7 is hinged to the first turntable 2.

[0060] Connector 8 connects the second end of the first connecting arm 6 and the second end of the second connecting arm 7. Connector 8 fixes the first connecting arm 6 and the second connecting arm 7 relative to each other. At least one of the connections between connector 8 and the first connecting arm 6, and between connector 8 and the second connecting arm 7, can be disengaged.

[0061] After multiple valve seats are installed on the sleeve rod 4, the sleeve rod 4 is placed between two centers 31. The movable part 12 is moved so that the two centers 31 enter the two first holes of the sleeve rod 4. The locking member 9 restricts the sliding of the movable part 12 on the guide rail 30, so that the sleeve rod 4 is stably supported by the two centers 31. The connecting piece 8 connects the second end position of the first connecting arm 6 and the second end position of the second connecting arm 7. The motor 3 drives the first turntable 2 to rotate, causing the sleeve rod 4 and the multiple valve seats fixed on the sleeve rod 4 to rotate together, and the surfaces of these valve seats are polished together.

[0062] In some embodiments, the second end of the first connecting arm 6 has a first insertion hole 6a for the connector 8 to be inserted. The connector 8 can be adjusted laterally in a fixed position on the second connecting arm 7 so that the connector 8 can be inserted into or removed from the first insertion hole 6a, that is, the connection between the connector 8 and the first connecting arm 6 can be disengaged.

[0063] Please see Figure 2 and Figure 3 Furthermore, the first insertion hole 6a is a through hole. The connector 8 includes: a first threaded section threaded to the second connecting arm 7 and a first smooth section that mates with the first insertion hole 6a. That is, a bolt can be used as the connector 8, and the bolt nut serves as the first smooth section. When the connector 8 is connected to the first connecting arm 6, an internal hexagonal socket is passed through the first insertion hole 6a, the position of the second connecting arm 7 is swung so that the internal hexagonal socket can connect to the bolt, and the internal hexagonal socket is rotated so that the nut enters the first insertion hole 6a.

Claims

1. A fixture for grinding the outer wall of a valve seat, characterized in that, include: The mounting part (1) includes: a fixed part (11) and a movable part (12) that can be horizontally adjusted relative to the fixed part (11); Both the fixed part (11) and the movable part (12) are fixedly provided with a top (31); The first turntable (2) is rotatably connected to the fixed part (11); it is ring-shaped and allows the tip (31) of the fixed part (11) to pass through; Motor (3) drives the first turntable (2) to rotate; The sleeve (4) has a fixed stop (4a) at the first end; both end faces have a first hole for the support of the tip (31), so that the sleeve (4) can be detachably connected between the two tips (31); The movable stop (5) is detachably connected to the second end of the sleeve rod (4) and its connection position can be adjusted along the axial direction of the sleeve rod (4); The first connecting arm (6) is fixedly connected to the sleeve rod (4) at its first end; The second connecting arm (7) is hinged at its first end to the first turntable (2); The connector (8) connects the second end position of the first connecting arm (6) and the second end position of the second connecting arm (7), so that the first connecting arm (6) and the second connecting arm (7) are relatively fixed; at least one of the connection between the connector (8) and the first connecting arm (6) and the connection between the connector (8) and the second connecting arm (7) can be released.

2. The fixture for grinding the outer wall of a valve seat according to claim 1, characterized in that, The second end of the first connecting arm (6) has a first socket (6a) for inserting the connector (8); the connector (8) can be adjusted horizontally to a fixed position on the second connecting arm (7) so that the connector (8) can be inserted into or removed from the first socket (6a).

3. The fixture for grinding the outer wall of a valve seat according to claim 2, characterized in that, The first insertion hole (6a) is a through hole; the connector (8) includes: a first threaded section that is threaded to the second connecting arm (7) and a first smooth section that mates with the first insertion hole (6a).

4. The fixture for grinding the outer wall of a valve seat according to claim 1, characterized in that, The locking component (9) of the movable part (12) includes: a second turntable (91), two clamping blocks (92), and a stud (93); the second turntable (91) is rotatably connected to the movable part (12) around a vertical axis; the two clamping blocks (92) are horizontally and longitudinally slidably connected to the movable part (12), and a slotted pin pair is provided between the second turntable (91); the stud (93) is threadedly connected to the movable part (12), and has only vertical movement freedom between the second turntable (91).

5. The fixture for grinding the outer wall of a valve seat according to claim 1, characterized in that, The fixed part (11) has a connecting post (11a), the end face of the connecting post (11a) has a second hole for the fixed connection of the top (31), and the outer wall of the connecting post (11a) is connected to a bearing (32) for the rotational connection of the first turntable (2).

6. The fixture for grinding the outer wall of a valve seat according to claim 1, characterized in that, The movable stop (5) is threaded to the sleeve (4).

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