Pneumatic hinge knife

Abstract

The utility model discloses a kind of pneumatic hinge knives, it is related to flexible bending technical field, including knife shell body, setting up guide slot mouth in the top of knife shell body, inside is provided with switching chamber and push chamber;Switching chamber and push chamber are communicated;Rotary swing knife, installed in switching chamber;The body of rotary swing knife is installed with rotating combination shaft in switching chamber, rotating combination shaft connects knife shell body and rotary swing knife;The center of gravity of rotary swing knife and rotating combination shaft is not co-vertical axis arrangement;Piston combination, installed in push chamber;The end of piston combination is used for laterally movable and abuts the upper side wall of rotary swing knife;Pneumatic hole is set up on knife shell body, pneumatic hole is communicated to push chamber, pneumatic joint is installed outside pneumatic hole, to solve the inconvenient rotary action structure of traditional hinge knife and the problem of long bending response time influence.

Description

Technical Field

[0001] This utility model relates to the field of flexible bending technology, specifically a pneumatic hinge knife. Background Technology

[0002] In industrial processing, bending operations of flexible materials are frequently required. However, traditional bending machines cannot meet manufacturing requirements in terms of bending degree and accuracy, and the bent parts often return to their original shape. While manual bending can prevent the bent parts from deforming and returning to their original shape, it is difficult to guarantee accuracy and bending angle. Therefore, for the bending process of flexible materials, bending equipment is a very important innovation to solve this problem.

[0003] Flexible bending centers can bend complex shapes such as right angles, non-right angles, arcs, and upward and downward bends. They can complete multi-sided bending in one positioning and are used in metal forming fields of different industries and workpieces. Currently, flexible bending centers are gradually replacing CNC bending machines.

[0004] Existing hinge cutters, such as the flexible bending center slide rail pneumatic hinge cutter CN202210900263.2, achieve the function of a hinge cutter, but in actual analysis, they are multi-link mechanisms with complex structures. Moreover, the hinge cutter itself slides up and down along the slide rail groove rather than rotating, which is not suitable for occasions that require rotation.

[0005] The applicant applied for and was granted license CN202422003933.8 last year for a flexible bending center rotary hinge cutter, which can realize the workpiece rotation bending action. However, the rotation of the hinge cutter is achieved by extruding the connecting pin, and the motor drives the gear rack to drive the extruding connecting pin to change the direction of the hinge cutter. This method has a long response time on high-frequency bending machines, which is not conducive to mass production.

[0006] To address these issues, we provide a pneumatic hinge knife. Utility Model Content

[0007] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a pneumatic hinge knife to solve the problems of inconvenient rotation mechanism and long bending response time of traditional hinge knives.

[0008] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a pneumatic hinge knife, comprising:

[0009] The blade housing body has a guide groove at the top and an internal connecting cavity and a pushing cavity; the connecting cavity and the pushing cavity are connected.

[0010] A rotating blade is installed in the transition cavity; the blade body of the rotating blade is mounted with a rotating assembly shaft in the transition cavity, and the rotating assembly shaft connects the blade housing body and the rotating blade; the center of gravity of the rotating blade and the center of the rotating assembly shaft are not set on the same vertical axis.

[0011] A piston assembly is installed inside the push chamber; the end of the piston assembly is used to laterally move and abut against the upper side wall of the rotating blade;

[0012] A pneumatic hole is provided on the blade housing body, which is connected to the push chamber, and a pneumatic connector is fitted to the pneumatic hole.

[0013] In a further technical solution, the adapter cavity is divided into an upper cavity and a lower cavity, which are connected and inclined.

[0014] The upper cavity extends to the side wall of the blade body and has an elongated hole. A baffle is provided at the bottom of the elongated hole, and the baffle moves in contact with the rotating blade.

[0015] The bottom and sides of the lower cavity extend outwards into the blade casing body;

[0016] A connecting hole is provided between the upper cavity and the pushing cavity.

[0017] In a further technical solution, the rotating blade includes a rotating plate and a working blade body. The top of the rotating plate is a long diameter section, the bottom of which is connected to the rotating assembly shaft, and the upper sidewall is in movable contact with the piston assembly. The rotating plate and the working blade body are respectively provided with a connecting long hole one and a connecting long hole two, which are connected by a long rod bolt.

[0018] One side of the working blade body extends out of the blade housing, while the other side is arc-shaped and fits against the bottom of the rotating plate.

[0019] In a further technical solution, stepped holes are also provided in the blade shell body on both sides of the upper cavity; the stepped holes are connected to the upper cavity.

[0020] The rotating assembly shaft includes a hinge pin, which is sleeved with the rotating oscillating blade; the end of the hinge pin is located in a set of stepped holes, and the end of the hinge pin in another set of stepped holes is fitted with a countersunk screw and a washer is sleeved on the outside.

[0021] In a further technical solution, the piston assembly includes an end cap and a piston body;

[0022] The pushing cavity extends away from the side wall of the elongated hole and is fitted with an end cap, which is detachably connected to the blade housing body.

[0023] The horizontal cross section of the piston body is cross-shaped, and the diameter of the end facing the transition cavity is smaller than the inner diameter of the connecting hole;

[0024] A connecting spring is fitted onto the piston body, and the diameter of the connecting spring is larger than the inner diameter of the connecting hole.

[0025] In a further technical solution, the vertically distributed outer diameter of the piston body is adapted to the inner wall of the pushing chamber, and positioning ring one and positioning ring two are respectively provided; a guide ring is installed inside positioning ring one, and an O-ring one is installed inside positioning ring two;

[0026] The end cap is provided with a positioning ring three and an O-ring two is installed on it;

[0027] A self-lubricating bearing is fixedly installed inside the connecting hole, and the corresponding end of the piston body is adapted to the interior of the self-lubricating bearing.

[0028] In a further technical solution, a fixing hole is provided on the blade housing body, and the fixing hole extends to the outside of the self-lubricating bearing; the fixing hole is a stepped hole, and a sealing bolt is installed inside it.

[0029] In a further technical solution, a pad is installed at the bottom of the lower cavity, and the pad is located above the working blade body; the pad is fixed to the bottom of the blade body by mounting positioning bolts.

[0030] In a further technical solution, the rotating plate is inclined on the side facing the baffle, and the rotating plate is at a right angle on the side facing the piston assembly; the right-angled top cutter body is also provided with a position hole, and when the top of the working cutter body is in contact with the pad, the position hole is connected to the connecting elongated hole.

[0031] Compared with existing technologies, it has the following advantages:

[0032] This invention features a two-part design: a piston assembly and a rotating blade. This achieves pneumatic control of the blade's oscillation, offering a simpler and more straightforward structure compared to linkage mechanisms, while also providing better practicality. Furthermore, the pneumatic circuit controls the lateral movement of the piston assembly, making it suitable for existing production processes. Compared to mechanical control of the rotating blade's oscillation, it also boasts advantages in size and ease of manufacturing. Finally, the pneumatic response time is superior, resulting in a more compact production cycle.

[0033] This invention achieves a rotating blade by using a split working blade body and a rotating plate, with a long screw connecting the working blade body and the rotating plate. One side of the working blade body and the bottom side of the rotating plate are arc-shaped, and a convex-concave connecting part is provided between them to prevent deflection. The other side of the working blade body is also arc-shaped, which is beneficial for bending the workpiece. Attached Figure Description

[0034] Figure 1This is a three-dimensional structural diagram of the pneumatic hinge knife of this utility model;

[0035] Figure 2 This is a schematic diagram of the structure of the blade shell body of this utility model. Figure 1 ;

[0036] Figure 3 This is a schematic diagram of the structure of the blade shell body of this utility model. Figure 2 ;

[0037] Figure 4 This is a side view of the blade housing body of this utility model;

[0038] Figure 5 for Figure 4 AA section view;

[0039] Figure 6 This is a rear view of the blade casing body of this utility model;

[0040] Figure 7 This is a cross-sectional view of the present invention.

[0041] Figure 8 This is a schematic diagram of the rotating oscillating knife of this utility model;

[0042] Figure 9 This is a cross-sectional view of the rotating oscillating knife of this utility model.

[0043] Figure 10 This is a side view of the other side of the pneumatic hinge knife of this utility model;

[0044] Figure 11 for Figure 10 CC section view;

[0045] Figure 12 for Figure 11 Enlarged view of part E;

[0046] Figure 13 for Figure 11 DD cross-sectional view;

[0047] Figure 14 This is an internal schematic diagram of the rotating pendulum blade falling according to this utility model.

[0048] In the picture:

[0049] 1. Blade housing body; 11. Guide groove; 12. Adapter cavity; 13. Push cavity; 14. Elongated hole; 15. Baffle part; 16. Connecting hole; 17. Stepped hole; 18. Fixing hole; 19. Sealing bolt; 110. Positioning hole; 111. Pneumatic hole;

[0050] 121. Upper cavity; 122. Lower cavity;

[0051] 2. Rotate the oscillating blade; 21. Rotating plate; 22. Working blade body; 23. Connecting long hole one; 24. Connecting long hole two; 25. Long rod bolt;

[0052] 3. Rotating assembly shaft; 31. Hinge pin; 32. Countersunk screw; 33. Washer;

[0053] 4. Piston assembly; 41. End cap; 42. Piston body; 43. Connecting spring; 44. Guide ring; 45. O-ring one; 46. O-ring two; 47. Self-lubricating bearing;

[0054] 5. Pneumatic connector; 6. Gasket. Detailed Implementation

[0055] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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.

[0056] Example 1

[0057] Please see Figure 1-7 14, provides a technical solution for this utility model, a pneumatic hinge knife, such as Figure 1 As shown, it includes:

[0058] Blade body 1, such as Figure 2 As shown, a guide slot 11 is provided on the top of the blade housing body 1, and a transfer cavity 12 and a push cavity 13 are provided inside; the transfer cavity 12 and the push cavity 13 are connected; the guide slot is a horizontal and vertical strip-shaped groove, which is used to connect to the external guide rail for lateral movement.

[0059] like Figure 1 As shown, the rotating blade 2 is installed in the transition cavity 12; the blade of the rotating blade 2 is mounted with a rotating combination shaft 3 in the transition cavity 12, and the rotating combination shaft 3 connects the blade housing body 1 and the rotating blade 2; the center of gravity of the rotating blade 2 and the center of the rotating combination shaft 3 are not on the same vertical axis.

[0060] The piston assembly 4 is mainly installed inside the push chamber 13; its end extends to the outer wall of the blade housing. The piston assembly 4 includes a fixed part and a movable part. The movable part is used for lateral movement to abut against the upper side wall of the rotating blade 2; the fixed part is as follows... Figure 1 End closure is performed during this process.

[0061] A pneumatic hole 111 is provided on the blade housing body 1, such as Figure 6As shown, the pneumatic hole 111 connects to the pushing cavity 13, and a pneumatic connector 5 is installed outside the pneumatic hole 111. In actual use, the pneumatic connector connects to an external air circuit to allow air to enter and exit the gap in the pushing cavity, thereby realizing the reciprocating push and pull of the moving part and driving the rotation of the rotating blade. The rotating blade rotates within the transition cavity around the rotating assembly shaft, with the blade housing extending from the bottom to achieve the rotational action and complete the pressing action of the hinge blade. The blade housing is integrally hardened to HRC46-50.

[0062] like Figure 5 As shown, the adapter cavity 12 is divided into an upper cavity 121 and a lower cavity 122, which are connected and inclined.

[0063] The upper cavity 121 extends to the side wall of the blade casing body 1 and has an elongated hole 14, such as... Figure 3 As shown, a baffle 15 is provided at the bottom of the elongated hole 14, and the baffle 15 is in movable contact with the rotating swashplate 2;

[0064] The bottom and sides of the lower cavity 122 are connected to the outside of the blade housing body 1; a connecting hole 16 is provided between the upper cavity 121 and the push cavity 13.

[0065] The connecting hole is a small-diameter hole relative to the transition cavity and the pushing cavity, through which the constrained piston assembly passes to perform a moving contact action. The bottom side of the lower cavity connects to the blade housing body for rotating the swing blade. This utility model sets the center of gravity of the rotating swing blade and the center of the rotating assembly shaft to be non-coaxial, in order to achieve an eccentric rotating swing blade. In the initial state, it naturally deflects under the action of gravity, such as... Figure 14 As shown, one side of the rotating blade is restricted from rotating by the baffle.

[0066] This invention features a two-part design: a piston assembly and a rotating blade. This achieves pneumatic control of the blade's oscillation, offering a simpler and more straightforward structure compared to linkage mechanisms, while also providing better practicality. Furthermore, the pneumatic circuit controls the lateral movement of the piston assembly, making it suitable for existing production processes. Compared to mechanical control of the rotating blade's oscillation, it also boasts advantages in size and ease of manufacturing. Finally, the pneumatic response time is superior, resulting in a more compact production cycle.

[0067] Example 2

[0068] like Figure 8 and 9 As shown, this is another embodiment of the present invention. Based on embodiment 1, the rotating blade 2 includes a rotating plate 21 and a working blade body 22. The top of the rotating plate 21 is the long diameter portion, and the bottom of the long diameter portion is as shown... Figure 8 At the opening position shown, it is connected to the rotating assembly shaft 3, and the upper side wall is in movable contact with the piston assembly 4;

[0069] like Figure 9 As shown, this is a cross-sectional view of the rotating blade. The rotating plate 21 and the working blade body 22 are respectively provided with a first connecting long hole 23 and a second connecting long hole 24. The first connecting long hole 23 and the second connecting long hole 24 are connected by a long rod bolt 25. One side of the working blade body 22 extends to the outside of the blade housing body 1, and the other side is arc-shaped and fits against the bottom of the rotating plate 21.

[0070] This invention achieves a rotating blade by using a split working blade body and a rotating plate, connected by a long screw. One side of the working blade body and the bottom side of the rotating plate are arc-shaped, with a convex-concave connection between them to prevent deflection. The other side of the working blade body is also arc-shaped, facilitating bending of the workpiece. The working blade body is laser-hardened to HRC55-60.

[0071] Example 3

[0072] like Figure 10-14 As shown, another embodiment of the present invention is provided. Based on embodiment 2, stepped holes 17 are also provided in the blade body 1 on both sides of the upper cavity 121; the stepped holes 17 are connected to the upper cavity 121.

[0073] The rotating assembly shaft 3 includes a hinge pin 31, which is sleeved with the rotating oscillating blade 2. The end of the hinge pin 31 is located in one set of stepped holes 17, and the end of the hinge pin 31 in another set of stepped holes 17 is fitted with a countersunk screw 32, and a washer 33 is sleeved on the outside. The countersunk screw is used to connect and fix the washer installed in the corresponding stepped hole, restricting the rotating assembly shaft to be located in the two sets of stepped holes.

[0074] like Figure 11 and 12 As shown, the piston assembly 4 includes an end cap 41 and a piston body 42;

[0075] The pushing cavity 13 extends away from the sidewall of the elongated hole 14 and is fitted with an end cap 41, which is detachably connected to the blade housing body 1. The piston body 42 has a cross-shaped horizontal cross section, and the diameter of the end facing the transition cavity 12 is smaller than the inner diameter of the connecting hole 16. The cross-shaped piston body has one long end and one short end laterally, and is cylindrical in the longitudinal direction. The long end laterally is spherical and requires high-frequency quenching to achieve a surface hardness of HRC42-45.

[0076] A connecting spring 43 is sleeved on the piston body 42, and the diameter of the connecting spring 43 is larger than the inner diameter of the connecting hole 16. The connecting spring is a rectangular spring.

[0077] like Figure 12The piston body 42 has a vertically distributed outer diameter that matches the inner wall of the pushing chamber 13, and is provided with a positioning ring one and a positioning ring two. A guide ring 44 is installed inside the positioning ring one, and an O-ring one 45 is installed inside the positioning ring two. A positioning ring three is provided on the end cap 41, and an O-ring two 46 is installed thereon. A self-lubricating bearing 47 is fixedly installed in the connecting hole 16, and the corresponding end of the piston body 42 matches the interior of the self-lubricating bearing 47. The guide ring extends to fit against the inner wall of the pushing chamber, maintaining its direction; the O-ring one keeps the two pushing chambers separated, ensuring the pneumatic pushing effect. The end cap seals the pushing chamber and also allows for easy removal of the piston body for maintenance.

[0078] refer to Figure 7 As shown, the blade housing body 1 has a fixing hole 18, which extends into the connecting hole 16. A self-lubricating bearing 47 is installed in the connecting hole 16. The fixing hole 18 is a stepped hole 17, and a sealing bolt 19 is installed inside it.

[0079] like Figure 11 As shown, a pad 6 is installed at the bottom of the lower cavity 122, and the pad 6 is located above the working blade body 22; the pad 6 is fixed to the bottom of the blade body 1 by mounting positioning bolts.

[0080] like Figure 11 and 14 The rotating plate 21 is inclined towards the side facing the baffle portion 15, and the rotating plate 21 is at a right angle towards the side facing the piston assembly 4; the right-angled top blade body 1 is also provided with a position hole 110, and when the top of the working blade 22 is in contact with the pad plate 6, the position hole 110 is connected to the connecting elongated hole 23. An upward positioning bolt is installed on the pad plate for fixation.

[0081] When in use, air is supplied to the pneumatic connector through the pneumatic pipeline. Due to the cross-shaped piston body, it moves laterally under pressure, and the ball head extends out of the self-lubricating bearing, maintaining the direction and lubrication of the ball head and preventing blockage during movement. The ball head moves against the rotating blade, driving the rotating blade to rotate along the axis of the rotating assembly shaft, thus realizing the rotational oscillation of the rotating blade.

[0082] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

Claims

1. A pneumatic hinge knife, characterized in that, include: The blade body (1) has a guide groove (11) at the top and a connecting cavity (12) and a pushing cavity (13) inside; the connecting cavity (12) and the pushing cavity (13) are connected. Rotary swing blade (2) is installed in the transition cavity (12); the blade of the rotating swing blade (2) is installed in the transition cavity (12) with a rotating combination shaft (3), and the rotating combination shaft (3) connects the blade body (1) and the rotating swing blade (2); the center of gravity of the rotating swing blade (2) and the center of the rotating combination shaft (3) are not on the same vertical axis; Piston assembly (4) is installed in push chamber (13); one end of piston assembly (4) is used to laterally move and abut against the upper side wall of rotating swing blade (2); A pneumatic hole (111) is provided on the blade body (1), the pneumatic hole (111) is connected to the push cavity (13), and a pneumatic connector (5) is fitted to the pneumatic hole (111).

2. The pneumatic hinge knife according to claim 1, characterized in that, The transfer cavity (12) is divided into an upper cavity (121) and a lower cavity (122), which are connected and inclined. The upper cavity (121) extends to the side wall of the blade body (1) and has an elongated hole (14). A baffle (15) is provided at the bottom of the elongated hole (14), and the baffle (15) is in contact with the rotating swing blade (2). The bottom and sides of the lower cavity (122) are connected outward to the outside of the blade body (1); A connecting hole (16) is provided between the upper cavity (121) and the pushing cavity (13).

3. A pneumatic hinge knife according to claim 2, characterized in that, The rotating swashplate (2) includes a rotating plate (21) and a working blade body (22). The top of the rotating plate (21) is a long diameter section, the bottom of which is connected to the rotating assembly shaft (3), and the upper side wall is in movable contact with the piston assembly (4). The rotating plate (21) and the working blade body (22) are respectively provided with a connecting long hole one (23) and a connecting long hole two (24), which are connected by a long bolt (25). One side of the working blade body (22) extends to the outside of the blade housing body (1), and the other side is arc-shaped and fits against the bottom of the rotating plate (21).

4. A pneumatic hinge knife according to claim 3, characterized in that, Stepped holes (17) are also provided in the blade body (1) on both sides of the upper cavity (121); the stepped holes (17) are connected to the upper cavity (121); The rotating combination shaft (3) includes a hinge pin (31), which is sleeved with the rotating swing blade (2); the end of the hinge pin (31) is located in a set of stepped holes (17), and the end of the hinge pin (31) in another set of stepped holes (17) is fitted with a countersunk screw (32) and a washer (33) is sleeved on the outside.

5. A pneumatic hinge knife according to claim 4, characterized in that, The piston assembly (4) includes an end cap (41) and a piston body (42). The pushing cavity (13) extends away from the side wall of the elongated hole (14) and is equipped with an end cap (41), which is detachably connected to the blade body (1). The horizontal cross section of the piston body (42) is cross-shaped, and the end facing the transition cavity (12) is spherical with a diameter smaller than the inner diameter of the connecting hole (16); A connecting spring (43) is fitted onto the piston body (42), and the diameter of the connecting spring (43) is larger than the inner diameter of the connecting hole (16).

6. A pneumatic hinge knife according to claim 5, characterized in that, The outer diameter of the piston body (42) is vertically distributed and is adapted to the inner wall of the push chamber (13), and is provided with positioning ring one and positioning ring two respectively; a guide ring (44) is installed in positioning ring one, and an O-ring (45) is installed in positioning ring two. The end cap (41) is provided with a positioning ring three and an O-ring two (46) is installed. A self-lubricating bearing (47) is fixedly installed inside the connecting hole (16), and the corresponding end of the piston body (42) is adapted to the interior of the self-lubricating bearing (47).

7. A pneumatic hinge knife according to claim 5, characterized in that, The blade housing body (1) has a fixing hole (18) which extends to the outside of the self-lubricating bearing (47); the fixing hole (18) is a stepped hole (17) and a sealing bolt (19) is installed inside.

8. A pneumatic hinge knife according to claim 5, characterized in that, A pad (6) is installed at the bottom of the lower cavity (122), and the pad (6) is located above the working blade body (22); the pad (6) is fixed to the bottom of the blade body (1) by mounting positioning bolts.

9. A pneumatic hinge knife according to claim 6, characterized in that, The rotating plate (21) is inclined on the side facing the baffle (15), and the rotating plate (21) is perpendicular to the side facing the piston assembly (4); The right-angled top blade body (1) is also provided with a position hole (110). When the top of the working blade body (22) is attached to the pad (6), the position hole (110) is connected to the connecting long hole (23).

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