Reciprocating drive mechanism and cutting knife

Abstract

The application provides a reciprocating driving mechanism and a cutting knife, and relates to the technical field of cutting knives. The reciprocating driving mechanism comprises an eccentric shaft, a first bearing, a sliding clamping groove and a movable rod. The eccentric shaft comprises a reference shaft section and an eccentric section. The first bearing is sleeved on the eccentric section. The outer ring of the first bearing is provided with two parallel planes. The sliding clamping groove is clamped on the two sides of the two planes and is in sliding fit with the first bearing. The axial direction of the movable rod is parallel to the length direction of the cutting knife body. The movable rod and the cutting knife body keep synchronous movement in the axial direction. The sliding clamping groove is fixedly connected with the movable rod. The extension direction of the sliding clamping groove and the axial direction of the movable rod form a first angle. The first angle is 75-105 degrees. A guide mechanism is used for guiding the axial movement of the movable rod. A first power mechanism is used for driving the eccentric shaft to rotate around the axis of the reference shaft section. The application offsets most of the movement perpendicular to the axial direction of the movable rod, thereby improving the neatness of the cut in the cloth cutting process.

Description

Technical Field

[0001] This application relates to the field of cutting tool technology, and in particular to a reciprocating drive mechanism and a cutting tool. Background Technology

[0002] A cutting machine is a processing device that cuts materials by driving the reciprocating motion of blades. The trajectory of the reciprocating motion of the blades determines the efficiency and quality of the material cutting. Therefore, the mechanism that drives the blades to reciprocate is particularly important in a cutting machine.

[0003] For example, Chinese invention patent application CN116852187A discloses an automatic sharpening mechanical cutting bed. Its cutting blade transmission mechanism uses a crank mechanism to drive the sliding of the blade shank assembly relative to the blade shank fixing seat. A swing mechanism is provided to limit the movement in the blade thickness direction, reducing vibration in that direction and thus improving the neatness of the cut during fabric cutting. However, during operation, the crank connecting rod of its crank mechanism is affected by the swing of the crank connecting rod, still causing uncontrollable vibration in the cutting blade, specifically vibration in the blade width direction. Utility Model Content

[0004] This application provides a reciprocating drive mechanism and a cutting tool to at least solve the above-mentioned technical problems existing in the prior art.

[0005] According to a first aspect of this application, a reciprocating drive mechanism is provided for driving the reciprocating motion of a cutting blade body, comprising: An eccentric shaft, the eccentric shaft comprising a reference shaft segment and an eccentric segment; The first bearing is sleeved on the eccentric section, and the outer ring of the first bearing has two parallel planes. A sliding groove, which is clamped on both sides of the two planes and forms a sliding fit with the first bearing; The movable rod has its axis parallel to the length direction of the cutter body, and the movable rod and the cutter body move synchronously along the axis; the sliding groove is fixedly connected to the movable rod, and the extension direction of the sliding groove forms a first angle with the axis of the movable rod; the first angle is 75° to 105°. A guiding mechanism is used to guide the movable rod to move axially; The first power mechanism is used to drive the eccentric shaft to rotate around the axis of the reference shaft segment.

[0006] In some embodiments of the first aspect of this application, the following are included: A bearing sleeve, wherein the reference shaft section is disposed within the bearing sleeve, and a plurality of bearings are disposed between the bearing sleeve and the reference shaft section; Mounting plate, the bearing sleeve is disposed through the mounting plate.

[0007] In some embodiments of the first aspect of this application, a movable box is included, wherein a hollow cavity is provided in the middle of the movable box, and the hollow cavity extends through the axial direction of the movable rod; the movable box opens toward the eccentric shaft and is fastened to the mounting plate; the first bearing, the sliding groove, and the movable rod are disposed in the hollow cavity.

[0008] In some embodiments of the first aspect of this application, the guiding mechanism includes a first guide sleeve and a second guide sleeve disposed on the outer periphery of the movable rod, and the first guide sleeve and the second guide sleeve are fixedly disposed on the movable box.

[0009] In some embodiments of the first aspect of this application, the first power mechanism includes: First motor; The first pulley is mounted on the output shaft of the first motor; The second pulley is disposed on the reference shaft section; The first belt is fitted over the outside of the first pulley and the second pulley.

[0010] In some embodiments of the first aspect of this application, a bracket is included, the bracket being connected to a mounting plate via a sliding mechanism; the sliding mechanism includes a slide rail and a slider, one of which is fixed to the bracket and the other to the mounting plate; the extension direction of the slide rail is parallel to the axial direction of the movable rod.

[0011] In some embodiments of the first aspect of this application, a second power mechanism is provided between the bracket and the mounting plate to drive them to slide relative to each other along the extension direction of the slide rail; the second power mechanism includes: Nuts are used to secure the device to the mounting plate. A screw is rotatably mounted on a bracket, and the screw is threadedly engaged with a nut. Second motor; The third pulley is mounted on the output shaft of the second motor; The fourth pulley is mounted on the screw. The second belt is fitted onto the outside of the third and fourth pulleys.

[0012] In some embodiments of the first aspect of this application, the bracket is provided with a groove extending in the same direction as the slide rail, and the bearing sleeve passes through the groove.

[0013] In some embodiments of the first aspect of this application, a cutter shaft is provided at the end of the movable rod, and a cutter clamp for fixing the cutter body is provided at the end of the cutter shaft; a fixing seat is provided at the connection between the movable rod and the cutter shaft, and the fixing seat is provided with: A tool bar guide block is disposed in a fixed base and slides with the fixed base along the extension direction of the movable rod; the tool bar guide block is fixedly connected to the movable rod. A rotating tool holder is coaxially arranged with the tool bar guide block, and a second bearing is provided between the tool bar guide block and the rotating tool holder to allow the tool bar guide block and the rotating tool holder to rotate axially; the rotating tool holder is fixedly connected to the tool shaft.

[0014] According to a second aspect of this application, a cutting tool is provided, including a cutting tool body and a reciprocating drive mechanism as described in the first aspect of this application.

[0015] Compared with the prior art, this application has the following advantages: This application mounts a first bearing on an eccentric shaft, which revolves around the eccentric shaft. A flat surface is then provided on the outer ring of the first bearing to achieve a sliding fit between the first bearing and the sliding groove. Since the extension direction of the sliding groove is at an angle of 75° to 105° to the extension direction of the movable rod, the sliding fit between the first bearing and the sliding groove can largely cancel out the movement perpendicular to the axial direction of the movable rod, thereby avoiding vibration in that direction and preserving the axial movement of the movable rod. Finally, the movable rod reciprocates with the revolution of the first bearing, transmitting this reciprocating motion to the cutting blade body, thus improving the neatness of the cut during the fabric cutting process.

[0016] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this application, nor is it intended to limit the scope of this application. Other features of this application will become readily apparent from the following description. Attached Figure Description

[0017] The above and other objects, features, and advantages of exemplary embodiments of this application will become readily apparent from the following detailed description taken in conjunction with the accompanying drawings. Several embodiments of this application are illustrated in the drawings by way of example and not limitation, in which: In the accompanying drawings, the same or corresponding reference numerals indicate the same or corresponding parts.

[0018] Figure 1 The overall structure of this application is shown in the schematic diagram. Figure 1 .

[0019] Figure 2 The overall structure of this application is shown in the schematic diagram. Figure 2 .

[0020] Figure 3 A cross-sectional view of this application is shown.

[0021] Figure 4 It shows Figure 3 Enlarged view of a portion of point A in the middle.

[0022] Figure 5 It shows Figure 3 Enlarged view of section B in the middle.

[0023] Figure 6 A schematic diagram of the first bearing structure of this application is shown.

[0024] Figure 7 A partial schematic diagram of the drive mechanism of this application is shown.

[0025] Figure 8 A schematic diagram of the working state of the drive mechanism of this application is shown.

[0026] Figure 9 A schematic diagram of the installation position of the sliding mechanism of this application is shown.

[0027] Explanation of reference numerals in the attached figures: 10. Eccentric shaft; 11. Reference shaft section; 12. Eccentric section; 13. Bearing sleeve; 14. Bearing; 20. First bearing; 21. Plane; 30. Sliding card slot; 40. Movable rod; 41. First guide sleeve; 42. Second guide sleeve; 50. First power mechanism; 51. First motor; 52. Second pulley; 53. First belt; 60. Movable box; 61. Hollow cavity; 70. Mounting plate; 701. Fixing base; 71. Slide rail; 72. Slider; 73. Nut; 74. Screw; 75. Second motor; 76. Third pulley; 77. Fourth pulley; 78. Second belt; 80. Bracket; 81. Slide rail; 90. Cutting blade body; 91. Cutting shaft; 92. Cutting blade clamp; 93. Cutting blade guide block; 94. Rotating cutting blade clamp; 95. Second bearing. Detailed Implementation

[0028] To make the objectives, features, and advantages of this application more apparent and understandable, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0029] Example 1: This embodiment provides a reciprocating drive mechanism for driving the cutter body to reciprocate, with the aim of reducing vibrations other than axial reciprocating motion during the cutting process, thereby improving the stability of the axial reciprocating motion of the cutter and improving the neatness of the cut during the fabric cutting process.

[0030] Please refer to Figure 3 , Figure 4 and Figure 7 The reciprocating drive mechanism includes the following parts: An eccentric shaft 10 includes a reference shaft segment 11 and an eccentric segment 12. The axes of the reference shaft segment 11 and the eccentric segment 12 do not coincide. Therefore, when the reference shaft segment 11 rotates around its axis, the eccentric segment 12 will generate a corresponding eccentric rotation, that is, a combination of revolution and rotation.

[0031] In order to install the eccentric shaft 10, this embodiment also includes a bearing sleeve 13 and a mounting plate 70.

[0032] The reference shaft section 11 is disposed within the bearing sleeve 13, and a plurality of bearings 14 are disposed between the bearing sleeve 13 and the reference shaft section 11 to support the smooth rotation of the eccentric shaft 10.

[0033] The bearing sleeve 13 is disposed through the mounting plate 70, and the bearing sleeve 13 and the mounting plate 70 are fixedly connected.

[0034] The first bearing 20 is sleeved on the eccentric section 12, such as Figure 6 As shown, the outer ring of the first bearing 20 has two parallel planes 21. These two planes 21 may be machined from the outer ring of the bearing 20. In other embodiments, the two planes 21 may also be welded to the outer ring of the bearing 20.

[0035] The sliding groove 30 is clamped on both sides of the two planes 21 and forms a sliding fit with the first bearing 20; The movable bar is 40; please continue to refer to it. Figure 3 and Figure 4 The axial direction of the movable rod 40 is parallel to the length direction of the cutter body 90. The movable rod 40 and the cutter body 90 move synchronously along the axial direction, so that the reciprocating motion of the cutter body 90 can be achieved by driving the movable rod 40 to reciprocate. The sliding groove 30 is fixedly connected to the movable rod 40, and as shown... Figure 8 As shown, the extension direction of the sliding groove 40 forms a first angle α with the axis of the movable rod 40; the first angle α is close to 90°, and the specific value range is from 75° to 105°.

[0036] The movable rod 40 can be directly fixed to the cutter body 90, or it can be indirectly connected through other mechanisms, as long as it can transmit axial movement.

[0037] It is worth mentioning that, Figure 8 In the diagram, dotted line a represents the axial direction of the movable rod 40, and dotted line b represents the extension direction of the sliding groove 30.

[0038] Thus, due to the presence of the two planes 21, the first bearing 20 can slide freely relative to the sliding groove 30 along its extension direction to counteract the vibration perpendicular to the axis of the movable rod 40.

[0039] like Figure 4 and Figure 8 As shown, when the eccentric shaft 10 rotates, the first bearing 20 undergoes eccentric motion, including revolution and rotation, where the rotation is canceled out by the relative rotation of the inner and outer rings of the first bearing 20 itself. Since the first bearing 20 can slide freely relative to the sliding groove 30, the motion perpendicular to the extension direction of the movable rod 40 during revolution is also eliminated, leaving only the motion in the extension direction of the movable rod 40 to be transmitted to the movable rod 40, ultimately causing the movable rod 40 to undergo stable axial reciprocating motion.

[0040] by Figure 8 For example, the dashed line and the solid line represent the two states of the eccentric movement of the first bearing 20. Compared with the solid line, the lateral movement (perpendicular to the axis of the movable rod 40) of the dashed line position is eliminated by the sliding of the sliding groove 30, while the vertical movement is transmitted to the sliding groove 30, driving the sliding groove 30 and the movable rod 40 fixed thereto to perform vertical (along the axis of the movable rod 40) reciprocating motion. Finally, this axial reciprocating motion is transmitted to the cutting blade body 90, improving the neatness of the cut during the fabric cutting process.

[0041] To install mechanisms such as the first bearing 20, sliding groove 30, and movable rod 40, such as... Figure 3 and Figure 4 As shown, this embodiment also includes a movable box 60, in which a hollow cavity 61 is provided in the middle. The hollow cavity 61 extends through the axial direction of the movable rod 40 and opens toward the eccentric shaft 10 and is fastened to the mounting plate 70. The first bearing 20, the sliding groove 30, and the movable rod 40 are disposed in the hollow cavity 61.

[0042] A guiding mechanism is used to guide the movable rod 40 to move axially.

[0043] The guiding mechanism includes a first guide sleeve 41 and a second guide sleeve 42 disposed on the outer periphery of the movable rod 40. The first guide sleeve 41 and the second guide sleeve 42 are fixedly disposed on the movable box 60 and are respectively located on both sides of the sliding groove 30 along the axial direction of the movable rod 40.

[0044] The first power mechanism 50 is used to drive the eccentric shaft 10 to rotate around the axis of the reference shaft segment 11.

[0045] Please refer to Figure 2 The first power mechanism 50 includes: First motor 51; The first pulley is mounted on the output shaft of the first motor 51. Figure 2 The middle is blocked by the first motor 51; The second pulley 52 is disposed on the reference shaft section 11; The first belt 53 is fitted on the outside of the first pulley and the second pulley 52.

[0046] When the first motor 51 is working, the rotational motion of its output shaft is transmitted to the reference shaft section 11 in sequence through the first pulley, the first belt 53, and the second pulley 52, thereby achieving the purpose of driving the eccentric shaft 10 to rotate around the axis of the reference shaft section 11.

[0047] Under the operation of the first power mechanism 50, the eccentric shaft 10 rotates around the axis of the reference shaft segment 11, driving the first bearing 20 to rotate eccentrically. With the sliding cooperation of the first bearing 20 and the sliding groove 30, the vibration perpendicular to the axis of the movable rod 40 is eliminated, so that the movable rod 40 can make a pure axial reciprocating motion. Finally, the axial reciprocating motion is transmitted to the cutting blade body 90, improving the neatness of the cut during the cutting process.

[0048] Example 2: Based on Embodiment 1, in order to achieve height adjustment of the cutter body 90, Embodiment 2 further includes a bracket 80.

[0049] The bracket 80 is plate-shaped and is arranged side by side with the mounting plate 70.

[0050] The bracket and the mounting plate are connected by a sliding mechanism; the sliding mechanism includes a slide rail and a slider, one of which is fixed to the bracket and the other is fixed to the mounting plate; the extension direction of the slide rail is parallel to the axis of the movable rod.

[0051] The bracket 80 and the mounting plate 70 are connected by a sliding mechanism. To improve the stability of their relative sliding, multiple sets of the sliding mechanism can be provided. Please refer to... Figure 3 and Figure 9 Two sets of sliding mechanisms are set between the bracket 80 and the mounting plate 70, and another set of sliding mechanisms is set on the side of the bracket 80.

[0052] Each set of sliding mechanisms includes a slide rail 71 and a slider 72, one of which is fixed to the bracket 80 and the other is fixed to the mounting plate 70; the extending direction of the slide rail 71 is parallel to the axis of the movable rod 40.

[0053] Thus, the relative displacement of the slide rail 71 and the slider 72 can be achieved through the relative sliding of the slide rail 71 and the slider 72, ultimately realizing the adjustment of the working height of the cutter body 90 on the mounting plate 70.

[0054] The first power mechanism 50 is located on the back of the bracket 80. In order to accommodate the movement of the bearing sleeve 13 during the height adjustment of the mounting plate 70, the bracket 80 is provided with a slide groove 81 extending in the same direction as the slide rail 71, and the bearing sleeve 13 passes through the slide groove 81.

[0055] To automate the adjustment of the working height, a second power mechanism is provided between the bracket 80 and the mounting plate 70 to drive them to slide relative to each other along the extension direction of the slide rail.

[0056] Please refer to Figure 1 and Figure 2 The second power mechanism includes: Nut 73 is fixedly mounted on mounting plate 70; The screw 74 is rotatably mounted on the bracket 80, and the screw 74 is threadedly engaged with the nut 73; Second motor 75; The third pulley 76 is mounted on the output shaft of the second motor 75; The fourth pulley 77 is mounted on the screw 74; The second belt 78 is fitted on the outside of the third pulley 76 and the fourth pulley 77.

[0057] When the second motor 75 is working, the rotation of its output shaft is transmitted to the screw 74 in sequence through the third pulley 76, the second belt 78, and the fourth pulley 77. After the screw 74 and the nut 73 are threaded together, the rotation of the screw 74 is converted into the lifting motion of the nut 73, and finally the mounting plate 70 is equivalent to the lifting motion of the bracket 80.

[0058] In other embodiments, it is sometimes necessary to reverse the direction of the cutter body 90. In this case, it is necessary to enable the movable rod 40 and the cutter body 90 to rotate freely relative to each other while transmitting axial movement.

[0059] To achieve the above objectives, please refer to Figure 3 and Figure 5 The end of the movable rod 40 is provided with a cutter shaft 91, and the end of the cutter shaft 91 is provided with a cutter clamp 92 for fixing the cutter body 90.

[0060] A fixing seat 701 is provided at the connection between the movable rod 40 and the cutter shaft 91, and the fixing seat 701 is fixedly mounted on the mounting plate 70. The fixing seat 701 contains: The tool holder guide block 93 is disposed within the fixed base 701 and is movably engaged with the fixed base 701. The movable engagement includes a sliding engagement along the extension direction of the movable rod 40 and a rotational engagement along the circumferential direction of the movable rod 40. The tool holder guide block 93 is fixedly connected to the movable rod 40.

[0061] A rotating blade holder 94 is coaxially arranged with the blade guide block 93. A second bearing 95 is provided between the blade guide block 93 and the rotating blade holder 94, allowing the blade guide block 93 and the rotating blade holder 94 to rotate axially. Specifically, the outer ring of the second bearing 95 is fixedly connected to the blade guide block 93, and the inner ring of the second bearing 95 is fixedly connected to the rotating blade holder 94. The rotating blade holder 94 is fixedly connected to the blade shaft 91. Thus, the cutting blade body 90 and the movable rod 40 can rotate freely along the axis and can transmit axial reciprocating motion.

[0062] Example 3: Please refer to Figure 1 and Figure 2 A cutting tool is provided, including a cutting tool body 90 and a reciprocating drive mechanism as described in Embodiment 1 or Embodiment 2.

[0063] It should be understood that the various forms of processes shown above can be used to rearrange, add, or delete steps. For example, the steps described in this application can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this application can be achieved, and this is not limited herein.

[0064] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0065] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A reciprocating drive mechanism for driving a cutting blade body to reciprocate, characterized in that, include: An eccentric shaft, the eccentric shaft comprising a reference shaft segment and an eccentric segment; The first bearing is sleeved on the eccentric section, and the outer ring of the first bearing has two parallel planes. A sliding groove, which is clamped on both sides of the two planes and forms a sliding fit with the first bearing; The movable rod has its axis parallel to the length direction of the cutter body, and the movable rod and the cutter body move synchronously along the axis; the sliding groove is fixedly connected to the movable rod, and the extension direction of the sliding groove forms a first angle with the axis of the movable rod; the first angle is 75° to 105°. A guiding mechanism is used to guide the movable rod to move axially; The first power mechanism is used to drive the eccentric shaft to rotate around the axis of the reference shaft segment.

2. The reciprocating drive mechanism according to claim 1, characterized in that, include: A bearing sleeve, wherein the reference shaft section is disposed within the bearing sleeve, and a plurality of bearings are disposed between the bearing sleeve and the reference shaft section; Mounting plate, the bearing sleeve is disposed through the mounting plate.

3. The reciprocating drive mechanism according to claim 2, characterized in that, The device includes a movable box, in which a hollow cavity is provided in the middle, and the hollow cavity extends through the axial direction of the movable rod; the movable box opens towards the eccentric shaft and is fastened to the mounting plate; the first bearing, the sliding groove, and the movable rod are disposed in the hollow cavity.

4. A reciprocating drive mechanism according to claim 3, characterized in that, The guiding mechanism includes a first guide sleeve and a second guide sleeve disposed on the outer periphery of the movable rod, and the first guide sleeve and the second guide sleeve are fixedly disposed on the movable box.

5. A reciprocating drive mechanism according to claim 3, characterized in that, The first power mechanism includes: First motor; The first pulley is mounted on the output shaft of the first motor; The second pulley is disposed on the reference shaft section; The first belt is fitted over the outside of the first pulley and the second pulley.

6. A reciprocating drive mechanism according to claim 2, characterized in that, The device includes a bracket, which is connected to a mounting plate via a sliding mechanism. The sliding mechanism includes a slide rail and a slider, one of which is fixed to the bracket and the other is fixed to the mounting plate. The extension direction of the slide rail is parallel to the axis of the movable rod.

7. A reciprocating drive mechanism according to claim 6, characterized in that, A second power mechanism is provided between the bracket and the mounting plate to drive them to slide relative to each other along the extension direction of the slide rail; the second power mechanism includes: Nuts are used to secure the device to the mounting plate. A screw is rotatably mounted on a bracket, and the screw is threadedly engaged with a nut. Second motor; The third pulley is mounted on the output shaft of the second motor; The fourth pulley is mounted on the screw. The second belt is fitted onto the outside of the third and fourth pulleys.

8. A reciprocating drive mechanism according to claim 6, characterized in that, The bracket is provided with a slide groove extending in the same direction as the slide rail, and the bearing sleeve passes through the slide groove.

9. A reciprocating drive mechanism according to claim 2, characterized in that, The movable rod is equipped with a cutter shaft at its end, and a cutter clamp for fixing the cutter body is provided at the end of the cutter shaft; a fixing seat is provided at the connection between the movable rod and the cutter shaft, and the fixing seat contains: A tool bar guide block is disposed in a fixed base and slides with the fixed base along the extension direction of the movable rod; the tool bar guide block is fixedly connected to the movable rod. A rotating tool holder is coaxially arranged with the tool bar guide block, and a second bearing is provided between the tool bar guide block and the rotating tool holder to allow the tool bar guide block and the rotating tool holder to rotate axially; the rotating tool holder is fixedly connected to the tool shaft.

10. A cutting knife, characterized in that, It includes a cutting blade body and a reciprocating drive mechanism as described in any one of claims 1 to 9.

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