Double-positioning floating type turning clamp

Abstract

The utility model aims to provide the double-positioning floating type turning clamp which is compact in structure and is used for carrying out floating pressing and limiting on the circular motor end cover. The device comprises a supporting frame and a base which is fixedly connected to the supporting frame and used for containing products, a pressing and limiting assembly is arranged in each sliding groove, and each pressing and limiting assembly comprises a pressing driving device arranged on the lower surface of the base, a guide rail set arranged in the corresponding sliding groove and a sliding base connected with the guide rail set in a sliding mode. The lower end of the sliding seat is connected with the movable end of the pressing driving device, the arc-shaped fixing block is fixedly connected to the upper end of the sliding seat, the rotating pressing block is rotatably connected with the arc-shaped fixing block, a plurality of floating springs are arranged on the lower portion of the arc-shaped fixing block, and each floating spring is fixedly connected with the first face of the rotating pressing block. Arc-shaped surfaces in contact with the product are formed on the second surfaces of the rotary pressing blocks; and the three groups of rotary pressing blocks are matched to form a limiting space for pressing and limiting the product. The turning fixture is applied to the technical field of turning fixtures of vertical lathes.

Description

Technical Field

[0001] The utility model relates to the technical field of turning fixtures for vertical lathes, and particularly relates to a double-positioning floating turning fixture. Background Art

[0002] Turning is a method of machining workpieces by using the relative rotation of the workpiece with respect to the cutting tool on a lathe. The cutting energy for turning is mainly provided by the workpiece rather than the cutting tool. Among them, the vertical lathe used for turning is suitable for machining large and heavy parts with relatively large diameters, relatively small axial dimensions, and relatively complex shapes, such as various frames, shell parts, etc. It can perform machining of inner and outer cylindrical surfaces, conical surfaces, end faces, grooves, cutting, and drilling, reaming, boring, and tapping. With the aid of accessory devices, it can also perform thread turning, end face turning, profiling, milling, and grinding. However, in the current motor end cover turning processing technology, the turning fixtures for motor end covers have problems such as single fixture size, complex structure, high production cost, loosening of the motor end cover during turning, low turning accuracy, etc. Moreover, the common claw-type metal fixtures have relatively high hardness and are also prone to causing hard damage to the surface of the motor end cover, leaving marks and affecting the quality and appearance of the motor end cover. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a double-positioning floating turning fixture with a compact structure that performs floating pressing and limiting on a circular motor end cover.

[0004] The technical solution adopted by the utility model is as follows: The utility model includes a support frame and a base fixedly connected to the support frame for placing products. The base is formed with three groups of sliding grooves, and each sliding groove is provided with a pressing and limiting assembly. The pressing and limiting assembly includes a pressing driving device arranged on the lower surface of the base, a guide rail group arranged in the sliding groove, a sliding seat slidably connected to the guide rail group, the lower end of the sliding seat is connected to the movable end of the pressing driving device, an arc-shaped fixed block fixedly connected to the upper end of the sliding seat, and a rotating pressing block rotatably connected to the arc-shaped fixed block. A plurality of floating springs are arranged at the lower part of the arc-shaped fixed block, and each floating spring is fixedly connected to the first surface of the rotating pressing block. An arc-shaped surface in contact with the product is formed on the second surface of the rotating pressing block. The three groups of rotating pressing blocks cooperate to form a limiting space for pressing and limiting the product.

[0005] Further, the base is provided with a placement seat, the placement seat is formed with an air flow channel, a plurality of air holes communicating with the air flow channel are formed on the upper surface of the placement seat, and a vacuum generating device communicating with the air flow channel is arranged on the lower surface of the base.

[0006] Further, a protruding block rotatably connected to the arc-shaped fixing block is formed on the first surface of the rotary pressing block. Mounting holes corresponding to and fixedly connected to the respective floating springs are provided on both sides of the protruding block. A pressing convex block for pressing and limiting the product is formed on the second surface of the rotary pressing block.

[0007] Further, a gasket tightly fitted with the product is fixedly connected to the surface of the arc-shaped surface.

[0008] Further, the width of the middle part of the cross-section of the arc-shaped surface is smaller than the widths of the upper and lower ends of the cross-section of the arc-shaped surface.

[0009] Further, a rotary convex block is provided in the middle of the arc-shaped fixing block. The rotary convex block is rotationally engaged with the rotary pressing block through a rotating shaft. A plurality of reserved holes corresponding to and fixedly connected to the respective floating springs are provided on both sides of the rotary convex block. A connecting plate fixedly connected to the sliding seat is formed on the outer side surface of the arc-shaped fixing block (44). The connecting plate is formed with a positioning block for guiding and cooperating with the sliding seat.

[0010] Further, the sliding seat includes a pushing member connected to the movable end of the pressing driving device, a fixed seat fixedly connected to the guide rail group, and a connecting frame connected to the arc-shaped fixing block. A positioning groove for guiding and cooperating with the positioning block is formed in the upper part of the connecting frame. A pushing block for supporting and cooperating with the arc-shaped fixing block is formed in the middle of the connecting frame.

[0011] The beneficial effects of the present utility model are as follows: Since the present utility model adopts three groups of pressing driving components arranged at equal intervals, after the three groups of pressing and limiting components are simultaneously pushed out, the product is pushed to the middle of the base. Each time the product is placed, repositioning is not required, achieving rapid centering, effectively reducing repeated positioning, and improving the processing efficiency and positioning accuracy; the height of the rotary pressing block is greater than the height of the processed product. The rotary pressing block approaches the product along the direction of the guide rail group. The arc-shaped surface design can better contact the surface of the product, and the larger contact area can provide the top thrust at multiple points. After the product reaches the middle of the base, the pressing driving device continues to push out, the rotary pressing block rotates clockwise around the rotating shaft and compresses multiple groups of floating springs, and the pressing convex block located above the rotary pressing block limits and presses the product, realizing the pressing and limiting of the product. The structure is compact and simple, quickly squeezing and limiting the circular shell, and improving the processing efficiency; the design of the air holes and air flow channels in cooperation with the vacuum generating device forms a negative pressure adsorption effect when the product is placed, and positions through the negative pressure air flow adsorption, effectively reducing the processing error caused by the radial runout of the product during processing. Description of the Drawings

[0012] Figure 1 is a schematic structural diagram of the present utility model;

[0013] Figure 2It is a schematic structural diagram of the support frame and the base of the present utility model;

[0014] Figure 3 It is a schematic structural diagram of the pressing and limiting component of the present utility model;

[0015] Figure 4 It is an exploded view of the pressing and limiting component of the present utility model;

[0016] Figure 5 It is a schematic structural diagram of the sliding seat of the present utility model;

[0017] Figure 6 It is a schematic structural diagram of the arc-shaped fixing block of the present utility model;

[0018] Figure 7 It is a schematic structural diagram of the rotating pressing block of the present utility model.

[0019] In the figure: 1. Support frame; 2. Base; 21. Placing seat; 22. Air hole; 23. Vacuum generating device; 3. Sliding groove; 4. Pressing and limiting component; 41. Pressing driving device; 42. Guide rail group; 43. Sliding seat; 431. Thrust piece; 432. Fixed seat; 433. Connecting frame; 434. Positioning groove; 435. Pushing block; 44. Arc-shaped fixing block; 441. Rotating convex block; 442. Rotating shaft; 443. Reserved hole; 444. Connecting plate; 445. Positioning block; 45. Rotating pressing block; 451. Extending block; 452. Mounting hole; 453. Pressing convex block; 46. Floating spring; 47. Arc surface; 48. Gasket. Specific embodiments

[0020] As Figures 1 to 7As shown in the figure, in this embodiment, the utility model includes a support frame 1 and a base 2 fixedly connected to the support frame 1 for placing products. The base 2 is formed with three groups of sliding grooves 3, and each sliding groove 3 is provided with a pressing and limiting component 4. The pressing and limiting component 4 includes a pressing driving device 41 arranged on the lower surface of the base 2, a guide rail group 42 arranged in the sliding groove 3, a sliding seat 43 slidably connected to the guide rail group 42. The lower end of the sliding seat 43 is connected to the movable end of the pressing driving device 41, an arc-shaped fixing block 44 fixedly connected to the upper end of the sliding seat 43, and a rotating pressing block 45 rotatably connected to the arc-shaped fixing block 44. The lower part of the arc-shaped fixing block 44 is provided with a plurality of floating springs 46, and each floating spring 46 is fixedly connected to the first surface of the rotating pressing block 45. The second surface of the rotating pressing block 45 is formed with an arc-shaped surface 47 in contact with the product. The three groups of rotating pressing blocks 45 cooperate to form a limiting space for pressing and limiting the product. The pressing driving device 41 is a telescopic cylinder. The pressing driving device 41 is used to drive the sliding seat 43 to move along the direction of the guide rail group 42. The protruding block 451 arranged in the middle of the rotating pressing block 45 is rotatably connected to the rotating convex block 441 of the arc-shaped fixing block 44 through a rotating shaft 442. The lower part of the rotating pressing block 45 is pushed out under the support of a plurality of floating springs 46. The three groups of pressing and limiting components 4 are arranged at equal intervals, and the angle between each group of pressing and limiting components is 120 degrees. The contact surface between the rotating pressing block 45 and the product is a 120-degree circular surface. After the three groups of pressing and limiting components 4 are pushed out at the same time, the product is located in the middle of the base 2. Each time a product is placed, there is no need for repositioning, which improves the processing efficiency and positioning accuracy. The height of the rotating pressing block 45 is greater than the height of the product to be processed, and the surface of the product usually forms a curved surface structure. The rotating pressing block 45 approaches the product along the direction of the guide rail group 42. The design of the arc-shaped surface 47 can better contact the surface of the product, and the larger contact area can provide a top thrust at multiple points. After the product reaches the middle, the pressing driving device 41 continues to push out, and the rotating pressing block 45 rotates clockwise around the rotating shaft 442 and compresses a plurality of groups of floating springs 46. The pressing convex block 453 located on the upper part of the rotating pressing block 45 limits and presses the product, realizing the pressing and limiting of the product. The structure is compact and simple, quickly squeezing and limiting the circular shell, and improving the processing efficiency.

[0021] In this embodiment, the base 2 is provided with a placing seat 21. The placing seat 21 is formed with an air flow channel. The upper surface of the placing seat 21 is formed with a plurality of air holes 22 communicated with the air flow channel. The lower surface of the base 2 is provided with a vacuum generating device 23 communicated with the air flow channel. The height of the placing seat 21 is greater than the height of the base 2. With the design of the air holes 22 and the air flow channel in cooperation with the vacuum generating device 23, a negative pressure adsorption effect is formed when the product is placed. The product is positioned by negative pressure air flow adsorption, effectively reducing the processing error caused by the radial runout of the product during processing.

[0022] In this embodiment, an extension block 451 rotatably connected to the arc-shaped fixed block 44 is formed on the first surface of the rotary pressing block 45. Mounting holes 452 corresponding to and fixedly connected to the respective floating springs 46 are provided on both sides of the extension block 451. A pressing convex block 453 for pressing and limiting the product is formed on the second surface of the rotary pressing block 45. A rubber layer is attached to the surface layer of the pressing convex block 453, which has a certain buffering effect when pressing and limiting the product, avoiding damage to the surface of the product.

[0023] In this embodiment, a gasket 48 closely fitted with the product is fixedly connected to the surface of the arc-shaped surface 47. The gasket 48 is made of soft rubber material, effectively reducing the rigid friction occurring when the arc-shaped surface 47 contacts and pushes against the surface of the product, and further avoiding damage to the surface of the product.

[0024] In this embodiment, the width of the middle part of the cross-section of the arc-shaped surface 47 is smaller than the width of the upper and lower ends of the cross-section of the arc-shaped surface 47. The cross-section design with a narrow middle and wide ends enables the lower part of the arc-shaped surface 47 to apply a lateral thrust to the product during rotation, avoiding the situation where the arc-shaped surface 47 slips off and the pushing and limiting fails due to the too low height of the product.

[0025] In this embodiment, a rotary convex block 441 is provided in the middle of the arc-shaped fixed block 44. The rotary convex block 441 is rotationally matched with the rotary pressing block 45 through a rotary shaft 442. A plurality of reserved holes 443 corresponding to and fixedly connected to the respective floating springs 46 are provided on both sides of the rotary convex block 441. A connecting plate 444 fixedly connected to the sliding seat 43 is formed on the outer side surface of the arc-shaped fixed block 44. The connecting plate 444 is formed with a positioning block 445 guidingly matched with the sliding seat 43. A guiding column is arranged in the reserved hole 443, and the guiding column is guidingly matched with the floating spring 46. The structure of the positioning block 445 and the positioning groove 434 enables the arc-shaped positioning block 445 and the sliding seat 43 to be quickly positioned, facilitating subsequent locking and fixing with screws.

[0026] In this embodiment, the sliding seat 43 includes a pushing member 431 connected to the movable end of the pressing driving device 41, a fixed seat 432 fixedly connected to the guide rail group 42, and a connecting frame 433 connected to the arc-shaped fixed block 44. A positioning groove 434 guidingly matched with the positioning block 445 is formed in the upper part of the connecting frame 433. A pushing block 435 supporting and cooperating with the arc-shaped fixed block 44 is formed in the middle of the connecting frame 433.

[0027] The working principle of the present utility model:

[0028] After the product is placed in the base 2, the pressing drive device 41 is pushed out. The rotating pressing block 45 moves closer to the product along the direction of the guide rail group 42. The gasket 48 on the arc surface 47 contacts the product and pushes the product towards the middle of the placing seat 21. When all three groups of gaskets 48 contact the product, the product reaches the middle of the base 2. The pressing drive device 41 continues to be pushed out. The rotating pressing block 45 rotates clockwise around the rotating shaft 442 and compresses multiple groups of floating springs 46. The pressing convex block 453 located above the rotating pressing block 45 limits and presses the product, realizing the pressing and limiting of the product. The vacuum adsorption device adsorbs and positions through negative pressure air flow, effectively reducing the processing error caused by the radial runout of the product during processing.

[0029] Although the embodiments of the present invention are described with actual solutions, they do not constitute a limitation to the meaning of the present invention. For those skilled in the art, the modifications to its implementation solutions according to this specification and the combinations with other solutions are obvious.

Claims

1. A double-positioning floating turning fixture, comprising a support frame (1) and a base (2) fixedly connected to the support frame (1) for placing a product, characterized in that: The base (2) is formed with three groups of sliding grooves (3), and a pressing and limiting assembly (4) is arranged in each sliding groove (3). The pressing and limiting assembly (4) includes a pressing driving device (41) arranged on the lower surface of the base (2), a guide rail group (42) arranged in the sliding groove (3), a sliding seat (43) slidably connected with the guide rail group (42), the lower end of the sliding seat (43) is connected with the movable end of the pressing driving device (41), an arc-shaped fixing block (44) fixedly connected to the upper end of the sliding seat (43), and a rotating pressing block (45) rotatably connected with the arc-shaped fixing block (44). A plurality of floating springs (46) are arranged at the lower part of the arc-shaped fixing block (44), and each floating spring (46) is fixedly connected with the first surface of the rotating pressing block (45). An arc-shaped surface (47) for contacting the product is formed on the second surface of the rotating pressing block (45). The three rotating pressing blocks (45) cooperate to form a limiting space for pressing and limiting the product.

2. The double-position floating turning fixture according to claim 1, wherein: The base (2) is provided with a placing seat (21), the placing seat (21) is formed with an air flow channel, a plurality of air holes (22) communicating with the air flow channel are formed on the upper surface of the placing seat (21), and a vacuum generating device (23) communicating with the air flow channel is arranged on the lower surface of the base (2).

3. A double-positioning floating turning fixture according to claim 1, characterized in that: An extending block (451) rotatably connected with the arc-shaped fixing block (44) is formed on the first surface of the rotating pressing block (45). Mounting holes (452) correspondingly fixedly connected with the corresponding floating springs (46) are arranged on both sides of the extending block (451). A pressing convex block (453) for pressing and limiting the product is formed on the second surface of the rotating pressing block (45).

4. A double-positioning floating turning fixture according to claim 1, characterized in that: A gasket (48) tightly fitting with the product is fixedly connected to the surface of the arc-shaped surface (47).

5. A double-positioning floating turning fixture according to claim 1, characterized in that: The width of the middle part of the cross-section of the arc-shaped surface (47) is smaller than the width of the upper and lower ends of the cross-section of the arc-shaped surface (47).

6. A double-positioning floating turning fixture according to claim 1, wherein: A rotating convex block (441) is arranged in the middle of the arc-shaped fixing block (44). The rotating convex block (441) is rotationally matched with the rotating pressing block (45) through a rotating shaft (442). A plurality of reserved holes (443) correspondingly fixedly connected with the corresponding floating springs (46) are respectively arranged on both sides of the rotating convex block (441). A connecting plate (444) fixedly connected with the sliding seat (43) is formed on the outer side surface of the arc-shaped fixing block (44), and a positioning block (445) for guiding and cooperating with the sliding seat (43) is formed on the connecting plate (444).

7. The double-positioning floating turning fixture according to claim 6, characterized in that: The sliding seat (43) includes a pushing member (431) connected with the movable end of the pressing driving device (41), a fixed seat (432) fixedly connected with the guide rail group (42), and a connecting frame (433) connected with the arc-shaped fixing block (44). A positioning groove (434) for guiding and cooperating with the positioning block (445) is formed at the upper part of the connecting frame (433), and a pushing block (435) for supporting and cooperating with the arc-shaped fixing block (44) is formed in the middle of the connecting frame (433).

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