Automatic accessory head tensioning device for overbridge type planer type milling machine

Abstract

The utility model discloses an automatic tensioning device of an accessory head for a platform bridge type planer type milling machine, which belongs to the technical field of platform bridge type planer cars, and comprises a ram, four mounting grooves are arranged at one end of the ram and are arranged in a rectangular shape, and the other end of the ram is connected with the mounting grooves. And puller modules are fixed to the inner sides of the four mounting grooves, and oil cylinders are fixed to the upper ends of the puller modules. According to the automatic tensioning device for the accessory head of the platform bridge type planer type milling machine, the four puller modules are arranged, so that pulling force is dispersed, the pulling force is distributed more uniformly, and the problem that the stability and the firmness degree of connection are affected due to the fact that stress is concentrated when an existing automatic tensioning device for the accessory head of the platform bridge type planer type milling machine is used for fixing the accessory head through one or two automatic tensioning devices is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of overbridge gantry vehicles, and more specifically, it particularly relates to an automatic tensioning device for an accessory head of an overbridge gantry milling machine. Background Technique

[0002] Lathe accessories are auxiliary devices used to expand the processing performance and application range of machine tools. They play an important role in machining. By simplifying the workpiece installation work and reducing the auxiliary time required for installing the workpiece, using fixtures can make the workpiece installation stable, improve the stiffness of the workpiece during machining, thereby increasing the cutting amount, reducing the machine operation time, and further improving productivity. For the existing automatic tensioning device for the accessory head of an overbridge gantry milling machine, a single or double automatic tensioning devices are used to fix the accessory head, and the force is relatively concentrated, thus affecting the stability and firmness of the connection. Therefore, an automatic tensioning device for the accessory head of an overbridge gantry milling machine is proposed. Content of the Utility Model

[0003] Aiming at the deficiencies of the prior art, the utility model provides an automatic tensioning device for an accessory head of an overbridge gantry milling machine. By arranging four pull head modules, the pulling force is dispersed, making the pulling distribution more uniform, so as to solve the problem that a single or double automatic tensioning devices are used to fix the accessory head in the above background technique, resulting in relatively concentrated force and affecting the stability and firmness of the connection.

[0004] To achieve the above objectives, the utility model is realized through the following technical solutions: An automatic tensioning device for an accessory head of an overbridge gantry milling machine, including a ram, one end of the ram is provided with four installation grooves, the four installation grooves are arranged in a rectangular shape, and a pull head module is fixed inside the four installation grooves, and an oil cylinder is fixed at the upper end of the pull head module;

[0005] The pull head module includes a straight cylinder fixed to the inner side of the installation groove. A first groove is provided in the lower part of the inner side of the straight cylinder. A sleeve is fixed inside the first groove. A second groove is provided in the middle of the inner side of the sleeve. A convex block is fixed in the middle of the inner side of the second groove. A third groove is provided in the lower part of the inner side of the sleeve. A pull rod is slidably connected to the upper part of the inner side of the sleeve. A first gasket is fixed to the upper end of the pull rod. The top surface of the first gasket abuts against the output end of the oil cylinder. A second gasket is fixed to the upper part of the outer side of the pull rod. The top surface of the second gasket abuts against the bottom surface of the first gasket. A disc spring abuts against the bottom surface of the second gasket. The lower end of the disc spring abuts against a third washer. The bottom surface of the third washer abuts against the top surface of the sleeve. A connecting piece is fixed to the lower end of the pull rod. A chuck is fixed to the lower end of the connecting piece. A plurality of expansion joints are provided on the outer side of the chuck. A first inclined surface and a second inclined surface are also provided on the outer side of the chuck. The outer side of the first inclined surface is in sliding contact with the outer side of the convex block. The outer side of the second inclined surface is in sliding contact with the inner side of the third groove.

[0006] As a preferred technical solution of the present invention, the inner diameter of the first groove is larger than the inner diameter of the straight cylinder.

[0007] As a preferred technical solution of the present invention, the inner diameter of the second groove is larger than the inner diameter of the sleeve.

[0008] As a preferred technical solution of the present invention, the inner diameter of the third groove is larger than the inner diameter of the second groove.

[0009] As a preferred technical solution of the present invention, the outer diameter of the first gasket is the same as the inner diameter of the straight cylinder, and the outer side of the first gasket is in sliding contact with the inner side of the straight cylinder.

[0010] As a preferred technical solution of the present invention, the outer diameter of the second gasket is the same as the inner diameter of the straight cylinder, and the outer side of the second gasket is in sliding contact with the inner side of the straight cylinder.

[0011] As a preferred technical solution of the present invention, the inner diameter of the third washer is larger than the outer diameter of the pull rod, and the outer diameter of the third washer is smaller than the inner diameter of the sleeve.

[0012] The present invention provides an automatic tensioning device for an accessory head of an overpass type gantry milling machine, which has the following beneficial effects:

[0013] 1. For the automatic tensioning device for the accessory head of the overpass type gantry milling machine, by arranging four pull head modules, the pulling force is dispersed, so that the pulling distribution is more uniform, thus solving the problem that the existing automatic tensioning device for the accessory head of the overpass type gantry milling machine uses a single or double automatic tensioning devices to fix the accessory head, and the force is relatively concentrated, thus affecting the connection stability and firmness.

[0014] 2. The automatic tensioning device for the accessory head of the overpass gantry milling machine has a reasonable and compact structural design and good use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 FIG. 1 is a front view structural schematic diagram of the automatic tensioning device for the accessory head of the overpass gantry milling machine of the present utility model.

[0016] Figure 2 FIG. 2 is a top view structural schematic diagram of the automatic tensioning device for the accessory head of the overpass gantry milling machine of the present utility model.

[0017] Figure 3 FIG. 3 is a sectional schematic diagram of the automatic tensioning device for the accessory head of the overpass gantry milling machine of the present utility model.

[0018] Figure 4 FIG. 4 is a sectional structural schematic diagram of the pull head module of the automatic tensioning device for the accessory head of the overpass gantry milling machine of the present utility model.

[0019] Figure 5 FIG. 5 is Figure 4 an enlarged schematic diagram of part A in the automatic tensioning device for the accessory head of the overpass gantry milling machine of the present utility model.

[0020] In the figures: 1. Ram; 2. Installation groove; 3. Pull head module; 4. Oil cylinder; 31. Straight cylinder; 32. First groove; 33. Sleeve; 34. Second groove; 35. Convex block; 36. Third groove; 37. Tie rod; 38. First packing ring; 39. Second packing ring; 310. Belleville spring; 311. Third washer; 312. Connecting piece; 313. Chuck; 314. Expansion joint; 315. First inclined surface; 316. Second inclined surface. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The following further describes in detail the embodiments of the present utility model with reference to the drawings and examples. The following examples are used to illustrate the present utility model, but cannot be used to limit the scope of the present utility model.

[0022] In the description of the present utility model, unless otherwise specified, "a plurality of" means two or more; the orientation or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0023] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "connected" and "connected to" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0024] Please refer to Figures 1 to 5 , the present utility model provides a technical solution: an automatic tensioning device for an accessory head of an overbridge gantry milling machine, including a ram 1. Four mounting grooves 2 are opened at one end of the ram 1. The four mounting grooves 2 are arranged in a rectangle. A draw head module 3 is fixedly mounted inside the four mounting grooves 2. An oil cylinder 4 is fixedly mounted at the upper end of the draw head module 3. The draw head module 3 includes a straight cylinder 31 fixedly mounted inside the mounting groove 2. A first groove 32 is opened at the lower part inside the straight cylinder 31. A sleeve 33 is fixedly mounted inside the first groove 32. A second groove 34 is opened at the middle part inside the sleeve 33. A convex block 35 is fixedly mounted at the middle part inside the second groove 34. A third groove 36 is opened at the lower part inside the sleeve 33. A pull rod 37 is slidably connected to the upper part inside the sleeve 33. A first washer 38 is fixedly mounted at the upper end of the pull rod 37. The top surface of the first washer 38 abuts against the output end of the oil cylinder 4. A second washer 39 is fixedly mounted on the outer side of the pull rod 37 at the upper part. The top surface of the second washer 39 abuts against the bottom surface of the first washer 38. A disc spring 310 abuts against the bottom surface of the second washer 39. The lower end of the disc spring 310 abuts against a third washer 311. The bottom surface of the third washer 311 abuts against the top surface of the sleeve 33. A connecting member 312 is fixedly mounted at the lower end of the pull rod 37. A chuck 313 is fixedly mounted at the lower end of the connecting member 312. A plurality of expansion joints 314 are opened on the outer side of the chuck 313. A first inclined surface 315 and a second inclined surface 316 are also opened on the outer side of the chuck 313. The outer side of the first inclined surface 315 is in sliding contact with the outer side of the convex block 35. The outer side of the second inclined surface 316 is in sliding contact with the inner side of the third groove 36. The inner diameter of the first groove 32 is larger than the inner diameter of the straight cylinder 31. The inner diameter of the second groove 34 is larger than the inner diameter of the sleeve 33. The inner diameter of the third groove 36 is larger than the inner diameter of the second groove 34. The outer diameter of the first washer 38 is the same as the inner diameter of the straight cylinder 31. The outer side of the first washer 38 is in sliding contact with the inner side of the straight cylinder 31. The outer diameter of the second washer 39 is the same as the inner diameter of the straight cylinder 31. The outer side of the second washer 39 is in sliding contact with the inner side of the straight cylinder 31. The inner diameter of the third washer 311 is larger than the outer diameter of the pull rod 37. The outer diameter of the third washer 311 is smaller than the inner diameter of the sleeve 33;

[0025] When installing the attachment head, insert the connecting piece of the attachment head into the drawbar module 3 on the ram 1. The output end of the oil cylinder 4 moves upward, and the disc spring 310 pushes the second washer 39 on the drawbar 37, causing the drawbar 37 to move upward and drive the chuck 313 to move upward through the connecting piece 312, so that the chuck 313 moves from the third groove 36 to the second groove 34. Since the inner diameter of the third groove 36 is larger than that of the second groove 34, the moving space becomes smaller. The second inclined surface 316 on the chuck 313 slides with the third groove 36 on the sleeve 33, thereby pressing the chuck 313 to close towards the middle along the expansion joint 314, thus clamping the connecting piece of the attachment head. At the same time, the first inclined surface 315 on the chuck 313 slides with the convex block 35 on the second groove 34, thereby pressing the chuck 313 to close towards the middle along the expansion joint 314, making the pressure distribution more uniform, thereby improving the connection stability. When disassembling the attachment head, the output end of the oil cylinder 4 pushes the first washer 38 on the drawbar 37, causing the drawbar 37 to move downward along the straight cylinder 31 and compress the disc spring 310. During this process, the chuck 313 moves from the third groove 36 to the second groove 34, and the moving space becomes larger, causing the chuck 313 to open towards the surroundings along the expansion joint 314, thus loosening the connecting piece of the attachment head. Through the above process, by setting four drawbar modules 3, the pulling force is dispersed, making the pulling distribution more uniform, thus solving the problem that the existing automatic tensioning device for the attachment head of the overbridge gantry milling machine uses a single or double automatic tensioning devices to fix the attachment head, and the force is relatively concentrated, thus affecting the connection stability and firmness.

[0026] Specific usage method and function of this embodiment: When the utility model installs the attachment head, insert the connecting piece of the attachment head into the drawbar module 3 on the ram 1. The output end of the oil cylinder 4 moves upward, and the disc spring 310 pushes the second washer 39 on the drawbar 37, causing the drawbar 37 to move upward and drive the chuck 313 to move upward through the connecting piece 312, so that the chuck 313 moves from the third groove 36 to the second groove 34. Since the inner diameter of the third groove 36 is larger than that of the second groove 34, the moving space becomes smaller. The second inclined surface 316 on the chuck 313 slides with the third groove 36 on the sleeve 33, thereby pressing the chuck 313 to close towards the middle along the expansion joint 314, thus clamping the connecting piece of the attachment head. At the same time, the first inclined surface 315 on the chuck 313 slides with the convex block 35 on the second groove 34, thereby pressing the chuck 313 to close towards the middle along the expansion joint 314, making the pressure distribution more uniform, thereby improving the connection stability. When disassembling the attachment head, the output end of the oil cylinder 4 pushes the first washer 38 on the drawbar 37, causing the drawbar 37 to move downward along the straight cylinder 31 and compress the disc spring 310. During this process, the chuck 313 moves from the third groove 36 to the second groove 34, and the moving space becomes larger, causing the chuck 313 to open towards the surroundings along the expansion joint 314, thus loosening the connecting piece of the attachment head.

[0027] The above are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, making equivalent substitutions or changes, shall be covered by the protection scope of the present utility model.

Claims

1. An automatic tensioning device for an accessory head of a bridge-type gantry milling machine, comprising a ram (1), characterized in that: One end of the ram (1) is provided with four mounting grooves (2), the four mounting grooves (2) are arranged in a rectangular shape, a slider module (3) is fixed inside the four mounting grooves (2), and an oil cylinder (4) is fixed at the upper end of the slider module (3); The slider module (3) comprises a straight tube (31) fixed to the inner side of the mounting groove (2), a first groove (32) is provided at the inner lower part of the straight tube (31), a sleeve (33) is fixed at the inner side of the first groove (32), a second groove (34) is provided at the inner middle part of the sleeve (33), a protrusion (35) is fixed at the inner middle part of the second groove (34), a third groove (36) is provided at the inner lower part of the sleeve (33), a pull rod (37) is slidably connected to the inner upper part of the sleeve (33), a first gasket (38) is fixed at the upper end of the pull rod (37), the top surface of the first gasket (38) is in contact with the output end of the oil cylinder (4), a second gasket (39) is fixed at the outer upper part of the pull rod (37), the top surface of the second gasket (39) is in contact with the output end of the oil cylinder (4), and a second gasket (39) is fixed at the outer upper part of the pull rod (37). The bottom surface of the pull rod (37) abuts against the bottom surface of the first gasket (38); the bottom surface of the second gasket (39) abuts against a butterfly spring (310); the lower end of the butterfly spring (310) abuts against a third gasket (311); the bottom surface of the third gasket (311) abuts against the top surface of the sleeve (33); the lower end of the pull rod (37) is fixed with a connecting piece (312); the lower end of the connecting piece (312) is fixed with a chuck (313); a plurality of expansion joints (314) are provided on the outer side of the chuck (313); a first inclined surface (315) and a second inclined surface (316) are also provided on the outer side of the chuck (313); the outer side of the first inclined surface (315) is in sliding contact with the outer side of the protrusion (35); the outer side of the second inclined surface (316) is in sliding contact with the inner side of the third groove (36).

2. The automatic tensioning device for the accessory head of the overhead bridge type gantry milling machine according to claim 1 is characterized in that: The inner diameter of the first groove (32) is greater than the inner diameter of the straight cylinder (31).

3. The automatic tensioning device for the accessory head of the overhead bridge type gantry milling machine according to claim 1, characterized in that: The inner diameter of the second groove (34) is greater than the inner diameter of the sleeve (33).

4. The automatic tensioning device for the accessory head of the overhead bridge type gantry milling machine according to claim 1, characterized in that: The inner diameter of the third groove (36) is greater than the inner diameter of the second groove (34).

5. The automatic tensioning device for the accessory head of the overhead bridge type gantry milling machine according to claim 1, characterized in that: The outer diameter of the first gasket (38) is the same as the inner diameter of the straight cylinder (31), and the outer side of the first gasket (38) is in sliding contact with the inner side of the straight cylinder (31).

6. The automatic tensioning device for the accessory head of the overhead bridge type gantry milling machine according to claim 1, characterized in that: The outer diameter of the second gasket (39) is the same as the inner diameter of the straight cylinder (31), and the outer side of the second gasket (39) is in sliding contact with the inner side of the straight cylinder (31).

7. The automatic tensioning device for the accessory head of the overhead bridge type gantry milling machine according to claim 1, characterized in that: The inner diameter of the third washer (311) is greater than the outer diameter of the pull rod (37), and the outer diameter of the third washer (311) is smaller than the inner diameter of the sleeve (33).

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