Three-ejector-pin clamp

Abstract

The utility model discloses a three-ejector-pin clamp, which relates to the field of blade clamps and comprises a bottom plate, an ejector tail seat and a center seat are arranged on the bottom plate, a center pin is movably connected onto the center seat through threads, at least two ejector tail pins are movably connected onto the ejector tail seat through threads, and the axial directions of the ejector tail pins and the center pin are parallel to the bottom plate. The tail ejector pin and the center pin are oppositely arranged; and the moving directions of the tail ejector pin and the center pin are along the axial directions of the tail ejector pin and the center pin. The blade blank can be clamped in a suspended mode, the axial direction of a blank body can be determined without repeated adjustment, and it is guaranteed that the axial direction of the blank body is basically parallel to the plane where the clamp base is located.

Description

TECHNICAL FIELD

[0001] The utility model relates to vane clamp field especially three top needle clamps. BACKGROUND

[0002] The embryo of the vane has the basic shape of the vane, that is, the embryo body is a curved surface; before processing the vane, it needs to be clamped to ensure the stability of the vane processing. When clamping, the axial direction of the embryo body and the plane where the clamp base is located need to be basically parallel to determine the subsequent processing reference. However, since the embryo itself is a curved surface, it is difficult to determine the axial direction of the embryo body if the embryo is placed directly on the ground, and it is difficult to ensure that the axial direction of the embryo body and the plane where the clamp base is located are basically parallel, and it is not convenient to install the clamp; therefore, the technical personnel in the field think of lifting the embryo through a lifting tool to be suspended in the air, adjusting the axial direction of the embryo body so that it is basically parallel to the plane where the clamp base is located; but this needs to be adjusted and measured repeatedly, the process is relatively complicated, and the efficiency is seriously affected, therefore, a new clamp needs to be designed to solve the technical problem. SUMMARY

[0003] The utility model discloses to solve the above-mentioned technical problems, provide a kind of three top needle clamps, embryo of vane can be suspended clamping, without repeatedly adjusting can determine the axial direction of the embryo body, to ensure that the axial direction of the embryo body and the plane where the clamp base is located are basically parallel.

[0004] The utility model discloses the technical scheme as follows: a kind of three top needle clamps, including bottom plate, top tail base and tip seat are provided on bottom plate, tip seat is movably connected with top pin by screw thread on top tail base, at least two top tail pins are movably connected with top tail base by screw thread, the axial direction of top tail pin and top pin is parallel with bottom plate, and top tail pin and top pin are oppositely arranged;The active direction of top tail pin and top pin is along its own axial direction.

[0005] Further, tip seat and top tail base are collectively referred to as seat body, top pin and top tail pin are collectively referred to as top pin, through hole is formed in the position where seat body and top pin are connected, back plate is fixed on seat body, top pin is threadedly connected with back plate, and the needle tip end of top pin passes through the through hole.

[0006] Further, the inner wall of the through hole and the top pin are provided with a bushing, and the bushing is fixedly connected with the through hole, and the bushing is slidably connected with the top pin.

[0007] Further, the top pin is provided with a limiting plate, the limiting plate is located between the back plate and the bushing, a spring is arranged between the limiting plate and the bushing or between the limiting plate and the back plate, and the spring is sleeved on the top pin.

[0008] Further, the top tail pin and the top pin are provided with a rotating handle.

[0009] Further, the top tail needle and all the top point needles are in the same plane.

[0010] Further, the top tail needle is two, and the projection of the top point needle is at the midpoint of the connecting line of the two top tail needles.

[0011] Further, the top tail seat and the bottom plate are detachably connected through screws; or / and the top tail seat and the bottom plate are detachably connected through screws.

[0012] Further, the bottom plate is provided with a plurality of threaded holes, the plurality of threaded holes are arranged along the axial direction of the top point needle, and the screw can be threadedly connected with the threaded hole after passing through the top tail seat.

[0013] Further, the bottom plate is provided with a key groove and a plurality of threaded holes, the length direction of the key groove is along the axial direction of the top tail needle, the bottom of the top tail seat is provided with a flat key matched with the key groove, and the plurality of threaded holes are arranged along the axial direction of the top point needle, and the screw can be threadedly connected with the threaded hole after passing through the top tail seat.

[0014] Therefore, the beneficial effects of the present application are as follows:

[0015] The embryo material is lifted and suspended by the cooperation of the top tail needle and the top point needle, and the axial direction of the embryo material is parallel to the bottom plate after being suspended, so that the axial direction of the embryo material is basically parallel to the base of the clamp when the clamp clamps the embryo material. BRIEF DESCRIPTION OF DRAWINGS

[0016] The present application will be described by examples and with reference to the accompanying drawings.

[0017] Fig. 1 It is a top view structural schematic diagram of the present application;

[0018] Fig. 2 It is a side view structural schematic diagram of the present application;

[0019] Marked in the figure: 1-bottom plate; 2-top point seat; 21-top point needle; 3-top tail seat; 31-top tail needle; 4-bush; 5-rotating handle; 6-through hole; 7-limiting plate; 8-key groove; 9-spring; 10-back plate; 11-threaded hole. DETAILED DESCRIPTION

[0020] In the description of the present specification, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship of the product in use of the specification, and are only for the convenience of describing the specification and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the specification.

[0021] In addition, in the description of the present specification, the terms "horizontal", "vertical" and the like do not mean that the components must be absolutely horizontal or vertical, but can be slightly inclined. For example, "horizontal" only means that it is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0022] In the description of the present specification, it should also be noted that unless otherwise explicitly specified and limited, if the terms "arrangement", "installation", "connection", "connection" appear, they should be understood in a broad sense. For example, the connection can be a fixed connection, or a detachable connection, or an integral connection; can be a mechanical connection, or an electrical connection; can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements.

[0023] Embodiment 1

[0024] As shown in Figs. 1-2 A three-point pin clamp, comprising a base plate 1, a top tail seat 3 and a top pin seat 2 are arranged on the base plate 1, a top pin 21 is movably connected to the top pin seat 2 through threads, and at least two top tail pins 31 are movably connected to the top tail seat 3 through threads, the axial directions of the top tail pins 31 and the top pin 21 are parallel to the base plate 1, and the top tail pins 31 are arranged opposite to the top pin 21; the moving direction of the top tail pins 31 and the top pin 21 is along the axial direction of itself.

[0025] In this embodiment, when the three-point pin clamp is used to clamp the blank, the blank needs to be placed between the top tail seat 3 and the top pin seat 2, the blank is lifted or lifted, the blank is moved so that one end of the blank is in contact with the top tail pin 31, and in the process, the degree or position of the threaded connection of the top tail seat 3 and the top tail pin 31 can be adjusted to ensure that all the top tail pins 31 are in contact with one end of the blank; then the top pin 21 is rotated, the degree or position of the threaded connection of the top pin 21 and the top pin seat 2 is adjusted, so that the top pin 21 is tightly pressed against the other end of the blank; through the cooperation of the top tail pin 31 and the top pin 21, the blank is clamped.

[0026] For example, for the material brand 14Cr12Ni3Mo2VN blade blank; when the blade blank is obtained from the blank manufacturer, the blade blank has a center hole at the blade tip, and two positioning holes at the blade root, i.e. the tailstock center aligns with the two positioning hole positions at the blade root, and the center aligns with the center hole at the blade tip.

[0027] As can be clearly understood from the above description, the tailstock center 31 must be multiple to ensure the stability of the clamping, and to avoid the axis collinear causing the blank to rotate.

[0028] In this embodiment, since the tailstock center 31 and the center 21 are both movable, they can achieve clamping of multiple specifications.

[0029] In summary, by cooperating the tailstock center 31 and the center 21, the blank is lifted and suspended, and after being suspended, the blank is also in a parallel state with the base plate 1. When clamping the blank with a clamp, the base of the clamp is placed on the base plate 1 to clamp, which can ensure that the axial body of the blank is basically parallel to the base of the clamp.

[0030] Embodiment 2

[0031] On the basis of embodiment 1, a specific implementation manner is further proposed.

[0032] A feasible implementation manner is that the connection structure between the tailstock seat 3 and the tailstock center 31 and the connection structure between the center seat 2 and the center 21 are basically the same. For the convenience of unified description, the center seat 2 and the tailstock seat 3 are collectively referred to as a seat body, and the center 21 and the tailstock center 31 are collectively referred to as a center. A through hole 6 is formed at the position where the seat body and the center are connected. The seat body is fixed with a back plate 10, and the center is threadedly connected with the back plate 10 and the needle tip end of the center penetrates through the through hole 6. Through this structure, the thread connection between the center and the seat body can be realized.

[0033] A feasible implementation manner is that a bushing 4 is arranged between the inner wall of the through hole 6 and the center, and the bushing 4 is fixedly connected with the through hole 6 and slidably connected with the center. The bushing 4 compensates for the gap between the center and the inner wall of the through hole 6, avoids the shaking of the center, and ensures the stability of the clamping of the blank.

[0034] A feasible implementation manner is that a limiting plate 7 is arranged on the center. The limiting plate 7 is located between the back plate 10 and the bushing 4. A spring 9 is arranged between the limiting plate 7 and the bushing 4 or between the limiting plate 7 and the back plate 10. The spring 9 is sleeved on the center. The spring 9 always has elastic force, which can apply elastic force to the center to increase the pre-tightening force of the thread connection between the center and the back plate 10, and avoid the loosening of the center when clamping the blank.

[0035] A feasible implementation, the top tail needle 31 and the top needle 21 are provided with rotating handles 5, facilitating the rotation of the top tail needle 31 and the top needle 21.

[0036] A feasible implementation, the top tail needle 31 and all the top needle 21 are in the same plane, so that the top pressing force on the blank is in the same plane, avoiding the generation of torque, improving the stability of the top pressing and clamping; in fact, it is difficult to be in the same plane, therefore, the error in the height direction is less than 0.1mm, avoiding the generation of excessive vertical torque.

[0037] A feasible implementation, the top tail needle 31 is 2, the projection of the top needle 21 is at the midpoint of the connecting line of the two top tail needles 31; so that the top pressing force distribution provided by the top tail needle 31 and the two sides of the top pressing force provided by the top needle 21 also avoid the generation of rotating torque, improve the stability of the top pressing and clamping; similarly, in fact, it is difficult to make the projection of the top needle 21 at the midpoint of the connecting line of the two top tail needles 31, therefore, the error of left and right deviation is less than 0.1mm.

[0038] It should be noted that "the top tail needle 31 and all the top needle 21 are in the same plane" and "the projection of the top needle 21 is at the midpoint of the connecting line of the two top tail needles 31" cooperate with each other to solve the stability problem of the blank top pressing and clamping.

[0039] A feasible implementation, the top seat 2 and the bottom plate 1 are detachably connected through screws, facilitating assembly and reducing space occupation when not in use.

[0040] A feasible implementation, a plurality of threaded holes 11 are formed on the bottom plate 1, the plurality of threaded holes 11 are arranged along the axial direction of the top needle 21, the top seat 2 and the bottom plate 1 are connected through screws and different threaded holes 11, the position of the connection between the top seat 2 and the bottom plate 1 is changed, further realizing the clamping of the blade blank of different sizes.

[0041] A feasible implementation, the top tail seat 3 and the bottom plate 1 are detachably connected through screws, also facilitating assembly and reducing space occupation when not in use.

[0042] A feasible implementation, a key groove 8 and a plurality of threaded holes 11 are formed on the bottom plate 1, the length direction of the key groove 8 is along the axial direction of the top tail needle 31, the bottom of the top tail seat 3 has a flat key matched with the key groove 8, the plurality of threaded holes 11 are arranged along the axial direction of the top needle 21, and the screw can be threadedly connected with the threaded hole 11 after passing through the top tail seat 3; the flat key can constrain the top tail seat 3 to shake in the direction perpendicular to the overall axis, improving the position stability; at the same time, the connection position of the top tail seat 3 and the bottom plate 1 is changed, further realizing the clamping of the blade blank of different sizes.

[0043] The present application is not limited to the foregoing specific embodiments. The present application extends to any new feature or combination of features disclosed in this specification, as well as any new method or process disclosed in this specification or any new combination of steps of the disclosed methods or processes.

Claims

1. A three-pin chuck, characterized by: The application relates to a top tail and top point needle device, which comprises a bottom plate (1), a top tail seat (3) and a top point seat (2) arranged on the bottom plate (1), a top point needle (21) threadedly movably connected to the top point seat (2), and at least two top tail needles (31) threadedly movably connected to the top tail seat (3), the axial directions of the top tail needles (31) and the top point needle (21) are parallel to the bottom plate (1), and the top tail needles (31) are arranged opposite to the top point needle (21); the moving directions of the top tail needles (31) and the top point needle (21) are along the axial directions of the top tail needles (31) and the top point needle (21).

2. The tri-pin clamp of claim 1, wherein: The top point seat (2) and the top tail seat (3) are collectively referred to as a seat body, the top point needle (21) and the top tail needle (31) are collectively referred to as a top needle, a through hole (6) is arranged at the position where the seat body and the top needle are connected, a back plate (10) is fixed to the seat body, the top needle is threadedly connected to the back plate (10), and the needle tip end of the top needle penetrates through the through hole (6).

3. The tri-pin clamp of claim 2, wherein: A bushing (4) is arranged between the inner wall of the through hole (6) and the top needle, and the bushing (4) is fixedly connected to the through hole (6) and slidably connected to the top needle.

4. The tri-pod clamp of claim 3, wherein: A limiting plate (7) is arranged on the top needle, the limiting plate (7) is located between the back plate (10) and the bushing (4), a spring (9) is arranged between the limiting plate (7) and the bushing (4) or between the limiting plate (7) and the back plate (10), and the spring (9) is sleeved on the top needle.

5. The tri-peg clamp of claim 1, wherein: The top tail needle (31) and the top point needle (21) are provided with rotating handles (5).

6. The tri-peg clamp of claim 1, wherein: The top tail needle (31) and all the top point needles (21) are located in the same plane.

7. The tri-peg clamp of claim 1, wherein: The top tail needle (31) is two, and the projection of the top point needle (21) is at the midpoint of the connecting line of the two top tail needles (31).

8. The tri-peg clamp of claim 1, wherein: The top point seat (2) and the bottom plate (1) are detachably connected through screws; or / and the top tail seat (3) and the bottom plate (1) are detachably connected through screws.

9. The tri-pod clamp of claim 8, wherein: A plurality of threaded holes (11) are arranged on the bottom plate (1) and along the axial direction of the top point needle (21), and screws can be threadedly connected to the threaded holes (11) after penetrating through the top point seat (2).

10. The tri-pod clamp of claim 8, wherein: A key groove (8) and a plurality of threaded holes (11) are arranged on the bottom plate (1), the length direction of the key groove (8) is along the axial direction of the top tail needle (31), the bottom of the top tail seat (3) is provided with a flat key matched with the key groove (8), the plurality of threaded holes (11) are arranged along the axial direction of the top point needle (21), and screws can be threadedly connected to the threaded holes (11) after penetrating through the top tail seat (3).

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