Pneumatic gear and rack rotary pressing mechanism

Abstract

The utility model discloses a pneumatic gear and rack rotating and pressing mechanism and belongs to the field of machining. Comprising a gear shaft, a hexagon thin nut A, a pressing plate, a sleeve, a set screw A, a hexagon thin nut B, an air cylinder, a set screw B, a hexagon thin nut C, a clamp body, a bearing plate, a workpiece and a push rod. A push rod at the front end of the cylinder is mounted in a clamp body hole; the sleeve is installed on the upper end face of the clamp body, the gear shaft is installed in the sleeve and penetrates through a clamp body hole, and the pressing plate is installed at the upper end of the gear shaft. And the gear shaft is meshed with the push rod in the clamp body. The gear shaft is driven to rotate through linear motion of the air cylinder and the push rod, the gear shaft and the pressing plate rotate up and down due to the fact that the spiral groove is formed in the outer diameter of the gear shaft, and clamping and loosening actions are achieved. The pressing device is compact in structure, convenient to operate, rigid in pressing, safe and reliable. Automatic rotating operation is guaranteed, and quick pressing of the parts is achieved.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical processing and relates to a pressing mechanism, and more particularly to a pneumatic gear and rack rotary pressing mechanism. Background Technology

[0002] As is well known, fixtures are essential clamping equipment in machining. During fixture design, pneumatic clamping devices are sometimes required, especially for machining large and medium-sized mechanical parts. Manual clamping is time-consuming and labor-intensive. Furthermore, if the clamping position of the machined part is far from the operator, manual operation becomes even more difficult.

[0003] For example, the State Intellectual Property Office of China granted a utility model patent on March 4, 2022, entitled "A Gear and Rack Pressing Mechanism," with an application date of August 19, 2021, application number 202121945611.5, and publication number CN 215942660 U. This utility model discloses a gear and rack pressing mechanism, including a drive module and a pressing module. The drive module includes a mounting bracket, a gear, a rack, a floating joint, and a cylinder. The gear is mounted on one side of the mounting bracket via a connecting shaft. The rack is longitudinally arranged and meshes with the gear. The cylinder is longitudinally arranged, and its top drive end is connected to the rack via a floating joint. The pressing module includes a pressing mounting block, a flipping block, a tongue block, a pressing transmission block, a linear slide rail, a movable pressing block, and a pressing head. To achieve the pressing function, this utility model uses multiple parts such as a cylinder, a gear and rack mechanism, a flipping block, rollers, a slide rail, and a limiting block, resulting in a relatively complex structure. Furthermore, this invention achieves elastic clamping, which has a certain buffering effect and is suitable for applications requiring elastic clamping. In contrast, rigid clamping is necessary for general machining applications to prevent tool breakage and dimensional inaccuracies during processing.

[0004] Therefore, it is necessary to provide a pneumatic gear and rack rotary clamping mechanism that is compact, easy to operate, safe and reliable, and that ensures automatic rotation operation and achieves rapid rigid clamping of parts. Utility Model Content

[0005] The purpose of this utility model is to provide a pneumatic gear and rack rotary clamping mechanism that is compact in structure, easy to operate, rigidly clamping, and safe and reliable.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a pneumatic gear and rack rotation clamping mechanism, comprising: a gear shaft, a hexagonal thin nut A, a pressure plate, a sleeve, a set screw A, a hexagonal thin nut B, a cylinder, a set screw B, a hexagonal thin nut C, a clamping body, a support plate, a workpiece, and a push rod; the cylinder is installed on the side of the clamping body, and the push rod at the front end of the cylinder is installed in the hole of the clamping body; the sleeve is installed on the upper end face of the clamping body, and the gear shaft is installed inside the sleeve and passes through the hole of the clamping body, with a pressure plate installed at its upper end; a helical rack is machined on one side of the outer diameter of the push rod, and a guide groove is machined on the other side; the helical gear at the lower end of the gear shaft meshes with the helical rack on the push rod inside the clamping body.

[0007] A pressure plate is installed on the upper part of the gear shaft, which is tightened with a hexagonal thin nut A. The gear shaft passes through the sleeve and is installed in the hole of the clamp body. The helical gear meshes with the helical rack of the push rod. A helical groove is machined on the outer diameter of the middle part of the gear shaft, and a helical gear is machined on the lower part.

[0008] The sleeve is fixed to the upper plane of the clamp body, and a set screw A is installed on the sleeve, which is tightened with a hexagonal thin nut B.

[0009] The fixture body is provided with a support plate, the workpiece is placed on the support plate, and a set screw B is installed on the side of the fixture body. The head of the set screw B is installed in the guide groove of the push rod and is tightened with a hexagonal thin nut C. There is a set of cross holes inside the fixture body.

[0010] The workpiece is placed on the support plate, and the pressure plate presses the workpiece down.

[0011] The advantages of this utility model, due to the adoption of the technical solution described above, are as follows: This utility model drives the gear shaft to rotate through the linear motion of the cylinder and push rod. Because there is a helical groove on the outer diameter of the gear shaft, the gear shaft, along with the pressure plate, rotates up and down, achieving clamping and releasing actions. This utility model has a compact structure, is easy to operate, provides rigid clamping, and is safe and reliable. It ensures both automatic rotation operation and rapid clamping of parts. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the main structure of a pneumatic gear and rack rotary clamping mechanism according to the present invention;

[0013] Figure 2 This is a top view schematic diagram of a pneumatic gear and rack rotary pressing mechanism according to the present invention;

[0014] Figure 3 for Figure 2 A schematic diagram of the A*-A* cross-sectional structure;

[0015] Figure 4 for Figure 1 A schematic diagram of the B*-B* cross-sectional structure.

[0016] In the diagram: 1. Gear shaft, 2. Hexagonal thin nut A, 3. Pressure plate, 4. Sleeve, 5. Set screw A, 6. Hexagonal thin nut B, 7. Cylinder, 8. Set screw B, 9. Hexagonal thin nut C, 10. Clamp body, 11. Support plate, 12. Workpiece, 13. Push rod, Helical groove D, Helical gear E, Helical rack F, Guide groove G. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments. For example... Figure 1-4 As shown, a pneumatic gear and rack rotation clamping mechanism includes: a gear shaft 1, a hexagonal thin nut A 2, a pressure plate 3, a sleeve 4, a set screw A 5, a hexagonal thin nut B 6, a cylinder 7, a set screw B8, a hexagonal thin nut C 9, a clamping body 10, a support plate 11, a workpiece 12, and a push rod 13. The cylinder 7 is mounted on the side of the clamping body 10, and the push rod 13 at the front end of the cylinder 7 is installed in a hole in the clamping body 10. The sleeve 4 is mounted on the upper end face of the clamping body 10, and the gear shaft 1 passes through the sleeve 4 and is installed in the hole in the clamping body 10. The pressure plate 3 is mounted on the upper end of the gear shaft 1. The helical gear E at the lower end of the gear shaft 1 meshes with the helical rack F on the push rod 13 within the clamping body 10. The workpiece 12 is placed on the plane of the support plate 11. The helical rack F is machined on one side of the outer diameter of the push rod 13, and a guide groove G is machined on the other side.

[0018] A pressure plate 3 is mounted on the upper part of the gear shaft 1 and tightened with a hexagonal thin nut A 2. A helical groove D is machined on the outer diameter of the middle part, and a helical gear E is machined on the lower part. The gear shaft 1 passes through the sleeve 4 and is installed in the hole of the clamp body 10. The helical gear E meshes with the helical rack F of the push rod 13. A set screw A 5 is mounted on the sleeve 4. The head of the set screw A 5 is installed in the helical groove of the gear shaft 1 and tightened with a hexagonal thin nut B 6, which causes the gear shaft 1 to move up and down and rotate along the helical groove D, thereby realizing the up and down and rotational movement of the pressure plate 3, clamping and releasing the workpiece 12.

[0019] The clamping body 10 is equipped with a support plate 11, and the workpiece 12 is placed on the support plate 11. The clamping body 10 is equipped with a set screw B8 on its side. The head of the set screw B8 is installed in the guide groove G of the push rod 13 and is tightened with a hexagonal thin nut C9, so that the push rod 13 moves linearly along the guide groove G.

[0020] Its working principle is as follows: The workpiece 12 is placed on the plane of the support plate 11. The control cylinder 7, together with the push rod 13, moves backward. The helical rack F on the push rod 13 meshes with the helical gear E at the lower part of the gear shaft 1. The gear shaft 1 drives the pressure plate 3 to rotate clockwise and move downward, pressing the workpiece 12. After processing, the control cylinder 7, together with the push rod 13, moves forward. The gear shaft 1 drives the pressure plate 3 to rotate counterclockwise and move upward, and the pressure plate 3 rotates to release the workpiece 12.

[0021] This invention utilizes a cylinder to drive a gear and rack mechanism to rotate, thereby causing the pressure plate to move up and down and rotate to achieve the clamping and loosening of the workpiece. It features a compact structure, convenient operation, rigid clamping, and is safe and reliable. It ensures both automatic rotational operation of the mechanism and rapid clamping and loosening of the workpiece.

Claims

1. A pneumatic gear and rack rotary clamping mechanism, comprising: Gear shaft (1), hexagonal thin nut A (2), pressure plate (3), sleeve (4), set screw A (5), hexagonal thin nut B (6), cylinder (7), set screw B (8), hexagonal thin nut C (9), clamp body (10), support plate (11), workpiece (12), push rod (13); characterized in that: the cylinder (7) is installed on the side of the clamp body (10), and the push rod (13) at the front end of the cylinder (7) is installed in the hole of the clamp body (10); the sleeve (4) is installed on the upper end face of the clamp body (10), the gear shaft (1) is installed in the sleeve (4) and passes through the hole of the clamp body (10), and the pressure plate (3) is installed on its upper end; the push rod (13) has a helical rack (F) machined on one side of its outer diameter and a guide groove (G) machined on the other side, and the helical gear (E) at the lower end of the gear shaft (1) meshes with the helical rack (F) on the push rod (13) in the clamp body (10).

2. The pneumatic gear and rack rotary clamping mechanism according to claim 1, characterized in that: The upper part of the gear shaft (1) is fitted with a pressure plate (3) and tightened with a hexagonal thin nut A (2). The gear shaft (1) passes through the sleeve (4) and is installed in the hole of the clamp body (10). The outer diameter of the middle part of the gear shaft (1) is machined with a spiral groove (D) and the lower part is machined with a helical gear (E). The helical gear (E) meshes with the helical rack (F) of the push rod (13).

3. The pneumatic gear and rack rotary clamping mechanism according to claim 1, characterized in that: The sleeve (4) is fixed on the upper plane of the clamp body (10), and a set screw A (5) is installed on the sleeve (4), which is tightened with a hexagonal thin nut B (6).

4. The pneumatic gear and rack rotary clamping mechanism according to claim 1, characterized in that: The fixture body (10) is provided with a support plate (11), the workpiece (12) is placed on the support plate (11), the fixture body (10) is provided with a set screw B (8) on the side, the head of the set screw B (8) is installed in the guide groove (G) of the push rod (13) and tightened with a hexagonal thin nut C (9), and there is a set of cross holes inside the fixture body (10).

5. The pneumatic gear and rack rotary clamping mechanism according to claim 4, characterized in that: The workpiece (12) is placed on the support plate (11), and the pressure plate (3) presses the workpiece (12) tightly.

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