An automatic centering fixture for a gear pump body

Abstract

This utility model belongs to the technical field of gear pump body centering fixtures. It discloses an automatic centering fixture for gear pump bodies, including a main fixture base plate mounted and fixed on a four-axis rotary table. The four-axis rotary table drives the main fixture base plate to rotate and adjust in the forward and backward directions. Two positioning blocks A, arranged horizontally, are fixed to the upper surface of the main fixture base plate with screws. Two positioning blocks B, which cooperate with the corresponding positioning blocks A, are also fixed to the upper surface of the main fixture base plate with screws. This utility model uses pneumatic control to symmetrically rotate the two grippers, which not only greatly improves positioning accuracy but also automatically corrects the position of the workpiece blank, thereby avoiding workpiece positional deviation.

Description

Technical Field

[0001] This utility model relates to the field of gear pump body centering fixture technology, specifically an automatic centering fixture for gear pump bodies. Background Technology

[0002] Existing gear pump body centering fixtures use a vise and a simple copying jig for clamping, which results in unstable positioning accuracy and easy workpiece position deviation. Based on this, we propose an automatic centering fixture for gear pump bodies. Utility Model Content

[0003] The purpose of this utility model is to provide an automatic centering fixture for gear pump bodies to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an automatic centering fixture for a gear pump body, comprising a fixture main base plate mounted and fixed on a four-axis turntable of a device, the four-axis turntable of the device being used to drive the fixture main base plate to rotate and adjust in the front and back directions, the upper surface of the fixture main base plate having two positioning blocks A distributed in the left and right directions fixed by screws, and the upper surface of the fixture main base plate also having two positioning blocks B that cooperate with the corresponding positioning blocks A fixed by screws;

[0005] Also includes:

[0006] There are four fixed seats, which are fixed on the upper surface of the main base plate of the fixture. The fixed seats cooperate with each other. The fixed seats are rotatably mounted with grippers through the opening of the mounting slot. The front and rear sides of the main base plate of the fixture are fixedly mounted with cylinders through cylinder connecting plates. The cylinders and the main base plate of the fixture are fixedly mounted through the cylinder connecting plates.

[0007] The output rod has a U-shaped structure and is fixedly installed at the output end of the cylinder. The cylinder is used to provide the driving force for the output rod to move. Both ends of the upper surface of the output rod are in contact with vertically sliding wedges that penetrate the main base plate of the clamp. The tops of the two wedges on the same output rod are respectively in contact with the bottom sides of the two jaws that are far apart from each other. The weight of the side of the two jaws that are far apart from each other and are on the same horizontal line is greater than the weight of the other side.

[0008] Preferably, both positioning block A and positioning block B are U-shaped structures, and positioning block A and positioning block B together form a product placement cavity, which is used for the workpiece blank.

[0009] Preferably, the gripper is located between the corresponding positioning block A and positioning block B. Bearing A is embedded and fixed on the inner wall of the front side and the inner wall of the mounting groove. A rotating shaft fixedly installed on the outer side of the gripper is fixedly mounted on the inner side of the inner ring of bearing A. The gripper can be rotated and installed in the mounting groove through bearing A and the rotating shaft on the outer side of the gripper.

[0010] Preferably, the main base plate of the fixture has multiple guide holes that slide and engage with the outer side of the corresponding wedge, and the guide holes provide guidance for the vertical movement of the wedge.

[0011] Preferably, the bottom of the main base plate of the fixture has two guide blocks A that are slidably fitted to the outer side of the corresponding output rod, and the bottom of the main base plate of the fixture also has two guide blocks B that are slidably fitted to the outer side of the corresponding output rod.

[0012] Preferably, both sides of the top of the output rod are provided as inclined surfaces, and the inclined surfaces slide in contact with the bottom of the wedge.

[0013] Preferably, the cylinder is also equipped with an air pipe, through which the cylinder is connected to an air source.

[0014] Compared with the prior art, this utility model uses pneumatic control to make two grippers rotate symmetrically, which not only greatly improves the positioning accuracy, but also automatically corrects the position of the workpiece blank, thereby avoiding the phenomenon of workpiece position deviation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0016] Figure 2 This is a top view of the structure of this utility model;

[0017] Figure 3 This is a bottom view of the structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the assembly structure of the main base plate of the fixture in this utility model on the four-axis rotary table of the equipment.

[0019] In the diagram: 100, four-axis rotary table of the equipment; 1, main base plate of the fixture; 2, positioning block A; 3, positioning block B; 4, gripper; 5, cylinder; 6, fixed seat; 7, cylinder connecting plate; 8, air pipe; 9, output rod; 10, guide block A; 11, guide block B; 12, wedge. Detailed Implementation

[0020] 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.

[0021] like Figure 1-4As shown, the automatic centering fixture for a gear pump body proposed in this embodiment includes a fixture main base plate 1 mounted and fixed on a four-axis rotary table 100 of the equipment. The four-axis rotary table 100 is used to drive the fixture main base plate 1 to rotate and adjust in the front and back directions. Two positioning blocks A2 distributed in the left and right directions are fixed to the upper surface of the fixture main base plate 1 by screws. Two positioning blocks B3 that cooperate with the corresponding positioning blocks A2 are also fixed to the upper surface of the fixture main base plate 1 by screws. Positioning blocks A2 and positioning blocks B3 are both U-shaped structures, and positioning blocks A2 and positioning blocks B3 together form a product placement cavity. The product placement cavity is used for workpiece blanks.

[0022] Also includes:

[0023] There are four fixed seats 6, which are fixed on the upper surface of the main base plate 1 of the fixture. The fixed seats 6 cooperate with each other. The fixed seats 6 are rotatably mounted with the gripper 4 through the opening of the mounting groove. The gripper 4 is located between the corresponding positioning block A2 and positioning block B3. The inner wall of the front side and the inner wall of the mounting groove are both embedded and fixed with bearing A. The inner ring of the bearing A is fixedly fitted with a rotating shaft fixedly mounted on the outer side of the gripper 4. The rotation of the gripper 4 in the mounting groove is realized through the bearing A and the rotating shaft on the outer side of the gripper 4. The front and rear sides of the main base plate 1 of the fixture are fixedly mounted with cylinder 5 through cylinder connecting plate 7. The cylinder 5 and the main base plate 1 of the fixture are fixedly mounted through cylinder connecting plate 7. The cylinder 5 is also mounted with air pipe 8. The cylinder 5 is connected to the air source through air pipe 8.

[0024] The output rod 9 has a U-shaped structure and is fixedly installed with the output end of the cylinder 5. The cylinder 5 is used to provide the driving force for the output rod 9 to move. Both ends of the upper surface of the output rod 9 are in contact with the vertically sliding wedges 12 that slide through the main base plate 1 of the clamp. The main base plate 1 of the clamp has multiple guide holes that slide with the outer side of the corresponding wedges 12. The guide holes provide guidance for the vertical movement of the wedges 12. The top two sides of the output rod 9 are set as inclined surfaces, which slide in contact with the bottom of the wedges 12. The tops of the two wedges 12 on the same output rod 9 respectively abut against the bottom sides of the two grippers 4 that are far apart from each other. The weight of the side of the two grippers 4 that are far apart from each other and are on the same horizontal line is greater than the weight of the other side. The bottom of the main base plate 1 of the clamp has two guide blocks A10 that slide and fit with the outer side of the corresponding output rod 9. The bottom of the main base plate 1 of the clamp also has two guide blocks B11 that slide and fit with the outer side of the corresponding output rod 9.

[0025] The usage method of this embodiment is as follows: In use, firstly, two workpiece blanks are placed into their respective product placement cavities and brought into contact with the upper surface of the main base plate 1 of the fixture. Then, the two cylinders 5 are started, and the output end of the cylinder 5 drives the output rod 9 to move horizontally. The output rod 9 presses upward on the wedge 12 through its top inclined surface, causing the wedge 12 to slide upward in the guide hole on the main base plate 1 of the fixture. The tops of the two wedges 12 on the same output rod 9 press upward on the jaws 4, causing the jaws 4 to rotate in the mounting groove on the fixed seat 6. Thus, the two jaws 4, with their ends close to each other, fix the workpiece blanks downward in the product placement cavity. During the clamping and fixing process, the position of the workpiece blanks can also be automatically corrected. As can be seen from the above, this embodiment, by pneumatically controlling the two jaws 4 to rotate symmetrically, not only greatly improves the positioning accuracy, but also automatically corrects the position of the workpiece blanks, thereby avoiding the phenomenon of workpiece position deviation.

[0026] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An automatic centering fixture for a gear pump body, comprising a main fixture base plate (1) mounted and fixed on a four-axis rotary table (100) of the equipment, characterized in that: The upper surface of the main base plate (1) of the clamp has two positioning blocks A (2) that are distributed in the left and right directions, which are fixed by screws. The upper surface of the main base plate (1) of the clamp also has two positioning blocks B (3) that cooperate with the corresponding positioning blocks A (2) by screws. Also includes: There are four fixed seats (6) and they are fixed on the upper surface of the main base plate (1) of the fixture. The two fixed seats (6) cooperate with each other. The fixed seats (6) are rotated and installed with grippers (4) through the opening of the mounting slot. The front and rear sides of the main base plate (1) are fixedly installed with cylinders (5) through cylinder connecting plates (7). The output rod (9) has a U-shaped structure and is fixedly installed with the output end of the cylinder (5). Both ends of the upper surface of the output rod (9) are in contact with the vertical sliding wedges (12) that penetrate the main base plate (1) of the fixture. The tops of the two wedges (12) on the same output rod (9) are respectively in contact with the bottom side of the two jaws (4) that are far apart from each other. The weight of the side of the two jaws (4) that are far apart from each other on the same horizontal line is greater than the weight of the other side.

2. The automatic centering fixture for a gear pump body according to claim 1, characterized in that: Both the positioning block A (2) and the positioning block B (3) are U-shaped structures, and together they form a product placement cavity.

3. The automatic centering fixture for a gear pump body according to claim 1, characterized in that: The gripper (4) is located between the corresponding positioning block A (2) and positioning block B (3). The bearing A is embedded and fixed on the inner wall of the front side and the inner wall of the mounting groove. A rotating shaft fixedly installed on the outer side of the gripper (4) is fixedly mounted on the inner side of the inner ring of the bearing A. Through the rotating shaft on the outer side of the bearing A and the gripper (4), the gripper (4) can be rotated and installed in the mounting groove.

4. The automatic centering fixture for a gear pump body according to claim 1, characterized in that: The main base plate (1) of the fixture has multiple guide holes that slide and engage with the outer side of the corresponding wedge (12).

5. The automatic centering fixture for a gear pump body according to claim 1, characterized in that: The bottom of the main base plate (1) of the fixture has two guide blocks A (10) that slide and fit with the outer side of the corresponding output rod (9), and the bottom of the main base plate (1) of the fixture also has two guide blocks B (11) that slide and fit with the outer side of the corresponding output rod (9).

6. The automatic centering fixture for a gear pump body according to claim 1, characterized in that: The top two sides of the output rod (9) are both set as inclined surfaces, and the inclined surfaces slide in contact with the bottom of the wedge (12).

7. The automatic centering fixture for a gear pump body according to claim 1, characterized in that: The cylinder (5) is also equipped with an air pipe (8), which connects the cylinder (5) to the air source through the air pipe (8).

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