A positioning fixture for producing utility knives

Abstract

The present application discloses a positioning fixture for producing utility knives, comprising a first limiting edge and a second limiting edge for limiting the outward movement of the utility blade to both sides, and also comprising a driving structure for driving the utility blade to move, wherein one or more gaps are formed at the second limiting edge, and the driving structure is arranged at the gaps of the second limiting edge; the driving structures are arranged in n numbers, wherein n is a positive integer, and the n driving structures rotate simultaneously and act on the opening grooves arranged on the surface of the utility blade in sequence, and finally move the utility blade in the forward direction by a distance of a positive integer multiple of the length of the utility blade; the driving structure forms an action part of 60° to 150° every time it rotates 360°, and the driving structure acts and drives the action part with the opening groove. The positioning fixture of the present application optimizes the structure for clamping and positioning and conveying the utility blade, and can quantitatively and stably feed the utility blade.

Description

Technical Field

[0001] The present application relates to the technical field of utility knives, and in particular to a positioning fixture for producing utility knives. Background Art

[0002] In the production line of utility knives, for example, punching and quenching require the position of the utility blade to be limited. At the same time, the utility blade needs to be fed at a certain speed and paused at the appropriate time to carry out various processes. When feeding in these processes, a positioning fixture is required to limit the position of the utility blade and feed it in a quantitative manner.

[0003] Since the blade of the utility knife is sharp and the blade is not strong enough before quenching, it is easy to be damaged when the force exerted by the ordinary clamp on the blade is large. At the same time, the existing utility knife often needs a high-precision manipulator or cylinder to grab the blade and move it forward during the clamping and limiting and quantitative feeding process. However, due to the high speed of assembly line production, long-term operation is prone to errors, failures and wear, and the replacement or repair of high-precision devices such as manipulators requires a large cost. Summary of the invention

[0004] The purpose of the present application is to provide a positioning fixture for producing utility knives.

[0005] To achieve the above objectives, the technical solution adopted in the present application is: a positioning fixture for the production of utility knives, comprising a first limiting edge and a second limiting edge for limiting the outward movement of the utility blade to both sides, and also comprising a driving structure for driving the utility blade to move, wherein one or more gaps are formed at the second limiting edge, and the driving structure is arranged at the gap of the second limiting edge; there are n driving structures in total, wherein n is a positive integer, and the n driving structures rotate simultaneously and act on the open grooves arranged on the surface of the utility blade in sequence, and finally the utility blade moves in the forward direction by a distance of a positive integer multiple of the length of the utility blade; when the driving structure rotates 360°, an action part of 60° to 150° is formed, and the driving structure acts and drives the action part with the open groove; after the previous driving structure leaves the open groove, the next driving structure is immediately connected or connected after a set interval and drives the next stage.

[0006] As a preferred embodiment, one of the driving structures is correspondingly provided with a rotating rod, and when the rotating rod rotates, the minimum value between its rotating end and the innermost side of the opening slot is greater than or equal to the rotating radius of the rotating rod; when the same rotating rod starts to act on the opening slot and finally leaves the opening slot, the angle between the driving structure and the art blade is the same in the two states; the rotating rod and the opening slot interact with each other, and after the rotating rod starts to contact the opening slot, the rotating rod rotates to make the opening slot move forward with the art blade in it, and after moving forward a distance of a set multiple of the length of the art blade, the rotating rod simultaneously rotates until it starts to leave the opening slot, thereby completing this stage of feeding.

[0007] As a further preference, the angle of rotation of the rotating rod corresponding to the interaction part between the rotating rod and the opening slot is below 120°; the rotating rod does not interact with the utility blade within the remaining angle range, and a pause interval is generated when all the rotating rods do not interact with the utility blade, and the pause interval is used for heating or cooling the utility blade or other processes.

[0008] As a preference, the driving structure is provided with one, and the rotating rod is correspondingly provided with one, and when the part where the rotating rod and the opening slot interact with each other completely passes through, the rotating rod advances a distance of a times the length of the utility blade, where a is a positive integer.

[0009] As another preferred embodiment, the driving structures are provided with two or more, all of which are provided with the same driving part for driving, and the multiple driving structures make all of the rotating rods rotate in the same direction and at the same speed; the angle range of interaction between each rotating rod and the art blade is 30°~120°; the position where the rotating rod rotates to the beginning of connecting with the opening groove is the initial action point; the angle between the rotating rod and the art blade at the initial action point is the initial angle, and the initial angles between two adjacent rotating rods have an angle difference, and the minimum value of the angle difference is the radian of the part where the rotating rod and the art blade interact, and the minimum value is also twice the complementary angle of the initial angle of the first rotating rod, so that after the previous rotating rod and the art blade have completed their action, the next rotating rod will not pass through the initial action point in advance; after each part where the rotating rod and the opening groove interact pass, the art blade moves in the forward direction by a distance of b times the length of the art blade, where b is one-n or b is a positive integer.

[0010] As a preferred embodiment, the initial angle of the rotating rod is 45°, and the rotating rods are arranged as rotating rod one and rotating rod two, and each of the rotating rods makes the utility blade advance a distance of half the length of the utility blade when the rotating rod rotates one circle; the angle difference between the rotating rod two and the rotating rod one is in the union of 90° and 180°~270°, and when the angle difference is 90°, after the opening slot of the rotating rod one and the utility blade is acted upon, a total movement of a distance of half the length of the utility blade is achieved, and when the rotating rod one leaves the opening slot When the angle difference is in the range of 180°~270°, after the rotating rod 1 rotates 90°, the rotating rod 2 needs to continue to rotate for a certain angle and then interact with the opening groove, thereby generating the pause interval. The pause interval prevents the rotating rod 1 and the rotating rod 2 from interacting with the utility blade when they interact with the utility blade, and at the same time provides pause time for other processes.

[0011] As a preference, the straight-line distance between the two rotating rods and the utility blade is the same, and the two rotating rods have the same length; the rotating rods are arranged as rotating rod one and rotating rod two, the height of the bottom surface of rotating rod one is greater than the height of the top surface of rotating rod two, and the bottoms of rotating rod one and rotating rod two are both connected to the same driving part through a rotating shaft; the utility blade is limited at a certain height above the work surface, and the height of rotating rod one and rotating rod two is at least partially within the thickness range of the utility blade.

[0012] Preferably, the first limiting edge and the second limiting edge have the same structure, and are both material structures with the function of limiting the outward movement of the utility blade; the inner edges of the first limiting edge and the second limiting edge are smooth planes or arc surfaces, so as to limit the edges of the utility blade; the first limiting edge and the second limiting edge form two limiting surfaces spaced apart from each other, and the utility blade is located between the two limiting surfaces when clamped, and the two limiting surfaces are respectively connected to the upper and lower surfaces of the utility blade to clamp the utility blade; or the first limiting edge and the second limiting edge include a plurality of rollers arranged at intervals, and the middle parts of the plurality of rollers have inner grooves to form a groove-like structure for limiting the utility blade.

[0013] Preferably, the driving part is a motor, and the multiple rotating rods are all connected to a gear structure. The motor drives a main gear, and the motor drives the main gear to rotate, thereby driving the gear structure connected to the multiple rotating rods, thereby realizing the rotation of the multiple rotating rods in the same direction and at the same speed; the gear structure includes a plurality of sub-gears directly connected to the rotating rods and a transmission gear, wherein the transmission gear is meshed and arranged between the multiple sub-gears at intervals.

[0014] As a preference, the opening groove is configured as a groove at the top or middle position of the unsharpened side of the utility blade; or the opening groove is configured as a serrated protrusion provided on the unsharpened side of the utility blade.

[0015] Compared with the prior art, the beneficial effects of this application are:

[0016] The rotating drive structure can drive the art blade to feed according to the feeding rhythm, and can produce a reasonable interval so that the art blade can complete the corresponding production process. The structure of clamping and positioning the art blade is optimized, and the art blade can be fed quantitatively and stably. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0018] Figure 2 yes Figure 1 The finished product of the Chinese-style knife blade after subsequent punching.

[0019] Figure 3 yes Figure 1 Side view of.

[0020] Figure 4 It is the state diagram of the rotating rod 1 in the initial action position state.

[0021] Figure 5 yes Figure 4 Schematic diagram of the transfer rod after it has been rotated 90°.

[0022] Figure 6 It is a schematic diagram of the driving structure in conjunction with the rotating rod.

[0023] Figure 7 It is a structural schematic diagram of another embodiment of a driving structure combined with a rotating rod.

[0024] Figure 8 It is a structural schematic diagram of a preferred embodiment of the first limiting edge and the second limiting edge.

[0025] Fig. 9 yes Figure 8 Side view of.

[0026] Fig.10 It is a structural schematic diagram of another optional embodiment of the first limiting edge and the second limiting edge.

[0027] Fig.11 yes Fig.10 Side view of.

[0028] In the figure: 1. workbench; 2. first limiting edge; 3. second limiting edge; 4. utility blade; 5. opening slot; 6. second rotating rod; 7. first rotating rod; 8. mounting hole; 9. cutting edge; 10. motor; 11. main gear; 12. secondary gear; 13. second rotation trajectory; 14. first rotation trajectory; 15. avoidance slot; 16. neutral gear. DETAILED DESCRIPTION

[0029] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0030] In the description of the present application, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of narrating the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and cannot be understood as limiting the specific scope of protection of the present application.

[0031] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0032] The terms "including" and "having" and any variations thereof in the specification and claims of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0033] Embodiment 1:

[0034] Reference Figures 1 to 11This embodiment proposes a positioning fixture for the production of utility knives, including a first limiting edge 2 and a second limiting edge 3 for limiting the outward movement of the utility blade 4 to both sides, and also includes a driving structure for driving the utility blade 4 to move, one or more gaps 16 are formed at the second limiting edge 3, and the driving structure is arranged at the gap 16 of the second limiting edge 3; there are n driving structures in total, where n is a positive integer, and the n driving structures rotate simultaneously and act on the opening groove 5 set on the surface of the utility blade 4 in sequence, and finally the utility blade 4 moves in the forward direction by a distance of a positive integer multiple of the length of the utility blade 4; when the driving structure rotates 360°, a 60° to 150° action part is formed, and the driving structure acts and drives the opening groove 5 at the action part; after the previous driving structure leaves the opening groove 5, the next driving structure is immediately connected or connected after a set interval and drives the next stage. The first limiting edge 2 and the second limiting edge 3 are actually just structures for limiting the utility blade 4. In this embodiment, the first limiting edge 2 is set to cooperate with one side of the edge end of the utility blade 4. Only by rotating the driving structure, the art blade can be driven to feed according to the feeding rhythm, and a reasonable interval can be generated so that the art blade can complete the corresponding production process.

[0035] By setting a neutral position on one side of the second limiting edge 3, a driving structure is set at the neutral position to drive the utility blade 4 to feed the material. In this process, the driving structure as a whole acts on the opening slot 5 by rotating, thereby allowing the utility blade 4 to move and feed the material. One rotation of the driving structure (i.e. 360°) is a feeding cycle, of which only 60° to 150° actually acts on the opening slot 5. The driving structure is sequentially set at the neutral position of the second limiting edge 3 to act on and drive the opening slot 5 in turn. Figure 3 The maximum drivable range of the driving structure shown will obviously not exceed 180°. When it is set to 180°, the driving structure and the opening slot 5 are likely to interfere with each other. In order to prevent such interference, we preferably adjust the upper limit of the lowering range to 150°, so that a sufficient distance can be kept between the driving structure and the utility blade 4. When the driving structure rotates, the distance it enters the opening slot 5 is small, so the required feeding distance can be achieved. Of course, Figure 3 The driving structure generally needs to have a protruding structure to interact with the opening slot 5, and this protruding structure is generally set as a rod or a block, which can be separated from the opening slot 5 after interacting with the opening slot 5, so as to facilitate the subsequent driving structure connection.

[0036] The above-mentioned protruding structure is mainly in the form of a rod body, and a driving structure is correspondingly provided with a rotating rod. When the rotating rod rotates, the minimum value between its rotating end and the innermost side of the opening slot 5 is greater than or equal to the rotating radius of the rotating rod. This value is limited so that when the rotating rod and the opening slot 5 interact with each other, the rotating rod will not be stuck and the opening slot 5 (that is, the art blade 4) will be stuck on the first limiting edge 2; when the same rotating rod starts to act on the opening slot 5 and finally leaves the opening slot 5, the angle between the driving structure and the art blade 4 in the two states is the same; the rotating rod and the opening slot 5 interact with each other, and after the rotating rod starts to contact the opening slot 5, the rotating rod rotates to make the opening slot 5 move forward with the art blade 4 in which it is located. After moving forward a distance of a set multiple of the length of the art blade 4, the rotating rod rotates at the same time until it starts to leave the opening slot 5, thereby completing the feeding at this stage.

[0037] Regarding the above “setting multiples”, a few examples are provided for illustration: if only one rotating rod is provided, the rotating radius of the rotating rod can be set larger, and the utility blade 4 can be driven to move forward a greater distance when it rotates. For example, the multiple can be set to two times, that is, when the rotating rod rotates one circle, the utility blade 4 moves forward by two lengths of the utility blade 4. In this way, when two punching positions are provided in front, for example, two utility blades 4 can be sent for processing at one time, thereby helping to improve production efficiency. However, some utility blades 4 for specific purposes may require more precise processing. In this case, the rotating radius of the rotating rod can be reduced. Each time the rotating rod acts on the opening slot 5, the utility blade 4 moves forward by half the length of the utility blade 4. In this case, the utility blade moves forward a smaller distance at a time, so a more delicate process can be performed.

[0038] Of course, in this embodiment, the "length of the utility blade 4" is obviously as follows Figure 2 The side length of the length direction of the utility blade 4 is shown. In this embodiment, the advancement or feeding of the "utility blade 4" generally refers to the feeding or advancement of the blade reel formed by connecting and winding the utility blade 4.

[0039] like Figure 2 As shown, the opening groove 5 is generally set at the top of the unsharpened side of the utility blade 4 to cut off the sharp corner of the top of the utility blade, so that it is not easy to cause harm to the operator or others when in use. It is a relatively common safety design of the utility blade 4, and therefore it is used as a known prior art in this application. Of course, in some specific cases, the opening groove 5 can also be set in the middle position of the unsharpened side of the utility blade for positioning or other purposes. The specific location of the opening groove 5 can be changed and is not a limitation to this application. In addition, the opening groove 5 is just a relatively general name. In fact, the serrated protrusion set on the unsharpened side of the utility blade 4 can also be regarded as the opening groove 5 described in this application.

[0040] The final production of the art blade 4 of this application can refer to Figure 2 ,contrast Figure 1 Utility Blade 4, Figure 2 The utility blade 4 has an additional mounting hole 8 and a cutting edge 9. The mounting hole 8 is used for mounting and positioning in the housing of the utility knife, and the cutting edge 9 is designed to remove the outermost blade of the utility knife after the outermost blade is worn. In addition, the utility blade 4 also has quenching and annealing processes to increase the strength of the utility blade 4.

[0041] Embodiment 2:

[0042] Based on Example 1, Fig.10 and Fig.11 As shown, the general structure of the first limiting edge 2 and the second limiting edge 3 is similar, and can be a strip-shaped material structure with a limit on the outward movement of the utility blade 4; the inner edges of the first limiting edge 2 and the second limiting edge 3 are relatively smooth planes or arc surfaces, so that the edge of the utility blade 4 can be limited, and the relatively smooth inner wall can reduce the wear of the utility blade 4 when it moves. The side of the utility blade 4 where the blade is sharpened is the main protection area of ​​the utility blade 4. To protect this area, the first limiting edge 2 and the second limiting edge 3 can also form two upper and lower limiting surfaces, and the utility blade 4 is between the two limiting surfaces. The two limiting surfaces are respectively connected to the upper and lower surfaces of the utility blade 4, so that the utility blade 4 can be clamped.

[0043] like Figure 8 and Fig. 9 The first limiting edge 2 and the second limiting edge 3 may also be a limiting groove structure formed by a plurality of rollers arranged at intervals and inner grooves in the middle of the plurality of rollers. The roller on one side of the first limiting edge 2 may be provided with an avoidance groove 15 to connect with the edge end of the utility blade 4.

[0044] Since other positioning structures are required in subsequent specific quenching / annealing processes to limit the position of the utility blade 4, the first limiting edge 2 and the second limiting edge 3 formed here do not need to completely and accurately clamp the utility blade 4. The clamp proposed in this application is mainly used to roughly position the utility blade 4 and drive the utility blade 4 to feed at a set rhythm.

[0045] Embodiment 3:

[0046] Based on Example 1, several specific implementation plans of the driving structure are proposed below.

[0047] First, the preferred implementation scheme of the driving structure when there is only one driving structure is proposed:

[0048] If there is one driving structure, there is a corresponding rotating rod, and the rotating rod interacts with the opening slot 5. After the rotating rod begins to contact the opening slot 5, the rotating rod rotates so that the opening slot 5 moves forward with the art blade 4 located therein. When the part where the rotating rod and the opening slot 5 interact completely passes, the total distance advanced is a times the length of the art blade 4, where a is a positive integer, and the rotating rod just rotates to start leaving the opening slot 5, thereby completing the feeding at this stage. The angle of rotation of the rotating rod corresponding to the part where the rotating rod and the opening slot 5 interact as mentioned above will not exceed 150°, and this angle is further limited to less than 120°. In the remaining angle range, the rotating rod does not interact with the art blade 4 when it rotates, and the entire art blade 4 will not move forward at this time, thereby generating a gap, which can be used to heat or cool the art blade 4 or perform other processes. Here, the distance that the art blade 4 moves forward when the rotating rod rotates one circle cannot generally be less than the length of one art blade 4. If it is less than this value, the rotating rod cannot interact with the opening slot 5 when the rotating rod rotates the next circle.

[0049] Secondly, two preferred implementation schemes of the driving structure are proposed when there are more than two driving structures.

[0050] The first type is that multiple drive structures are respectively provided with drive parts, and multiple drive parts are all controlled by an electronic control system, so as to drive and drive continuously at appropriate conditions. The electronic control is relatively accurate, but the cost is high, and the maintenance is troublesome and costly when a failure occurs.

[0051] The second type is that there are two or more drive structures, all of which are driven by the same drive unit, and multiple drive structures make all the rotating rods rotate in the same direction and at the same speed; the angle range of interaction between each rotating rod and the utility blade 4 is 30°~120°; the position where the rotating rod rotates to the beginning of connecting with the opening slot 5 is the initial action point, and the position where the corresponding rotation rotates to leave the opening slot 5 is the final action point. Obviously, Figure 5As shown in this embodiment, the initial action point and the final action point are symmetrical about the two sides of the rotation axis of the rotating rod; the angle between the rotating rod and the utility blade 4 at the initial action point is the initial angle, and the initial angles between two adjacent rotating rods have an angle difference, and the minimum value of the angle difference is the arc of the interactive part between the rotating rod and the utility blade 4. For example, the rotating rod 2 6 is behind the rotating rod 1 7, and the initial angle of the rotating rod 1 7 is 45°, then the minimum value of the initial angle of the rotating rod 2 6 is 90 degrees backward on the basis of the rotating rod 1 7. At the same time, the minimum value is also twice the complementary angle of the initial angle of the first rotating rod, so that after the previous rotating rod and the utility blade 4 have completed their action, the next rotating rod will not pass through the initial action point in advance; after each rotating rod and the opening slot 5 have passed the interactive part, the utility blade 4 moves in the forward direction by a distance of b times the length of the utility blade 4, where b is one-n or b is a positive integer.

[0052] In this embodiment, each time the rotating rod rotates one circle, the corresponding art blade 4 can be driven by a positive integer b times. Since a plurality of rotating rods are provided, the subsequent rotating rods can be connected under the premise that the rotating rods are in appropriate positions.

[0053] Reference Figure 4 and Figure 5 The first rotation track 14 of the rotating rod 1 7 and the second rotation track 13 of the rotating rod 2 6, Figure 5 The initial position of the rotating rod 7 (dashed line, corresponding to the accident action point) and the final action point after rotating 90° are clearly marked.

[0054] The following is an example of the interaction range of the rotating rod rotating one circle and the opening being 90°:

[0055] The driving part is specifically a rotation drive, and the driving part drives a rotating rod to rotate continuously. In the initial position, the angle between the rotating rod and the utility knife is 45°, that is, the initial angle of the rotating rod is 45°. The rotating rods are arranged as rotating rod one 7 and rotating rod two 6, and each rotating rod makes the utility knife 4 move forward a distance of half the length of the utility knife 4 when rotating one circle; the range of the angle difference between rotating rod two 6 and rotating rod one 7 is within the union of 90° and 180°~270°.

[0056] (1) Reference Figure 4 , Figure 5 When the angle difference is 90°, after the rotating rod 1 7 and the opening slot 5 of the utility blade 4 are completed, they move a total distance of half the length of the utility blade 4. When the rotating rod 1 7 leaves the opening slot 5, the rotating rod 2 6 enters the opening slot 5 immediately afterwards, and after the action is completed, the utility blade 4 moves forward another distance of half the length of the utility blade 4.

[0057] (2) When the angle difference is in the range of 180°~270°, after the rotating rod 1 7 rotates 90°, the rotating rod 2 6 needs to continue to rotate for a certain angle before interacting with the opening slot 5, thereby generating a pause interval. The pause interval prevents the rotating rod 1 7 and the rotating rod 2 6 from interacting with the utility blade 4, and at the same time provides a pause time for other processes. Generally speaking, the specific duration of the pause interval is the difference between the angle difference and the angle of rotation of the rotating rod 1 7 divided by the rotation speed of the rotating rod 2 6. For example, if the angle difference is 200°, after the rotating rod 1 7 rotates 90° (at this time the rotating rod 2 6 also rotates 90°), the rotating rod 2 6 rotates within 110°. When the angle is 10°, the second turning rod 6 has not reached its initial action position, while the first turning rod 7 has passed. Therefore, in this process, the first turning rod 7 and the second turning rod 6 do not act on the opening slot 5, so the art blade 4 is not driven at this time. When the second turning rod 6 rotates 110°, it reaches its initial action position. The second turning rod 6 then rotates 90°, which will allow the art blade 4 to move forward half the length of the art blade 4. At this time, compared with the initial angles of the two, the first turning rod 7 and the second turning rod 6 have rotated 90°+110°+90°, that is, 290°. At this time, the first turning rod 7 and the second turning rod 6 rotate 70° to return to their original positions. A certain interval is also generated in this stage. Therefore, by selecting different parameters, the pause time and rhythm can be adjusted to obtain the expected feeding.

[0058] like Figure 4 As shown, when the range of action of the rotating rod 1 7 and the rotating rod 2 6 corresponding to the opening slot 5 is set to 90° (assuming that the rotating rod 1 7 is located at the initial action position at this time), the angle difference can also be selected to be 270°. At this time, after the rotating rod 1 7 rotates 90° (the rotating rod 2 6 also rotates 90°), the rotating rod 2 6 will not interact with the opening slot 5 when it rotates within the range of 180°. The rotating rod 2 6 will act on the opening slot 5 only when it continues to rotate. Then, after a rotation of 90 degrees, the rotating rod 2 6 just rotates through the opening slot 5. At this time, the rotating rod 1 7 and the rotating rod 2 6 have just rotated 360° accordingly. After the rotating rod 1 7 rotates 90°, the rotating rod 1 7 continues to rotate within the range of 180°, and the rotating rod 1 7 and the rotating rod 2 6 no longer interact with the blade roll. There is only one pause interval generated in this process, but the interval time is relatively long.

[0059] The above three preferred solutions are based on the premise that the initial angle of the rotating rod 7 is 90° and the rotating rod rotates 90° during a driving process. When the initial angle and the angle of rotation during a driving process change, the specific motion state of the blade will also change accordingly.

[0060] Obviously, in this embodiment, the angle difference is avoided by taking into account the interference between the rotating rod 1 7 and the rotating rod 2 6 .

[0061] Embodiment 4:

[0062] Based on Examples 1 to 3, refer to Figure 7 In this embodiment, the straight-line distance between the two rotating rods and the utility blade 4 is the same, and the lengths of the two rotating rods are the same; the rotating rods are arranged as a rotating rod 1 7 and a rotating rod 2 6, the bottom surface of the rotating rod 1 7 is greater than the top surface of the rotating rod 2 6, and the bottoms of the rotating rod 1 7 and the rotating rod 2 6 are connected to the same driving part through a rotating shaft; the utility blade 4 is limited at a certain height above the workbench 1, and the heights of the rotating rod 1 7 and the rotating rod 2 6 are at least partially within the thickness range of the utility blade 4. At this time, the rotating rod 1 7 and the rotating rod 2 6 are as shown in FIG. Figure 7 As shown, even if the positions overlap, no interference will occur. Therefore, referring to the settings of the rotating rod 1 7 and the rotating rod 2 6 in Example 3, the preferred angle difference range of the rotating rod 1 7 and the rotating rod 2 6 in this embodiment is between 90° and 270°. Since the interference restriction between the rotating rod 1 7 and the rotating rod 2 6 is removed, a new interval of 90° to 180° is added.

[0063] Of course, the range of interaction between the rotating rod and the opening after one rotation can also be selected as 60°, for example. When a driving process is 60°, the corresponding initial position, the angle between the first rotating rod and the art blade 4 is 30°, and the corresponding angle between the rotating rod and the art blade 4 after completing this process is still 30°, but the opening direction of the angle has changed. Then when the rotating rod rotates 360°, the actual angle of interaction with the opening slot 5 is 60°. Obviously, the initial action point and the final action point when leaving are still on the same circle, and the rotating shaft of the rotating rod is the center of the circle. Similar to the principles of the previous implementation schemes, the distance that the art blade 4 advances during each driving process can be set, and multiple driving processes are accumulated to make the art blade 4 move at the set forward speed.

[0064] Obviously, when the rotating rod drives the utility blade 4 to move, the rotating rod preferably has a larger rotation radius in the initial state, so that the opening groove 5 does not need to be opened very deep, and the rotating rod can allow the utility blade 4 to move forward a relatively longer distance, which is more suitable for practical applications.

[0065] The widths of utility blades 4 of different specifications are also different. In order to adapt to the width of the utility blade 4, one side of the first limiting edge 2 can be set as a movable structure.

[0066] Embodiment 5:

[0067] Based on Examples 1 to 4, refer to Figure 6 , Figure 7, wherein the driving part is a motor 10, and multiple rotating rods are connected with a gear structure, and the motor 10 is driven to be provided with a main gear 11, and the main gear 11 driven by the motor 10 rotates, thereby driving the gear structure connected to the multiple rotating rods, so that the multiple rotating rods can rotate at the same speed. In such a transmission scheme, there is only one motor 10 for driving, even if the speed of the motor 10 and the set value have a certain error, it can still ensure that the multiple rotating rods are in a state of rotating at the same speed, thereby ensuring the stable transmission of the art blade 4. In this scheme, the transmission and synchronous rotation of the main gear 11 and the multiple sub-gears 12 can also be achieved by the cooperation of a similar sprocket + gear. The gear structure includes a plurality of sub-gears 12 directly connected to the rotating rods and a transmission gear that is one less than the number of sub-gears 12, wherein the transmission gear is arranged in meshing intervals between the multiple sub-gears 12.

[0068] like Figure 6 As shown, two rotating rods are provided, namely, rotating rod 1 7 and rotating rod 2 6. At this time, one transmission gear is correspondingly provided, and there are two sub-gears 12. The main gear 11 rotates with the motor 10, and the main gear 11 can rotate synchronously with the transmission gear, and then rotate with the two sub-gears 12. Of course, when only two rotating rods are provided, the transmission gear can be omitted, and the main gear 11 can directly drive the sub-gear 12 to rotate (in this case, Figure 6 as shown).

[0069] In addition, in some embodiments, when multiple rotating rods are provided, different types of rotating rods can also be provided at the same time to achieve further requirements (the rotating rods can also be different in this case), such as stopping at a special position and then directly passing through the entire distance of the blade without stopping. Under such requirements, for example, if a hole needs to be punched at the front 3 / 4 of the blade, that is, in actual operation, the blade needs to be advanced 3 / 4 first, then paused to punch holes, and then the remaining 1 / 4 is delivered after the punching is completed. For requirements like this, the following settings can be made:

[0070] First, set a rotating rod with a larger rotation radius and a smaller initial setting angle to obtain a larger driving stroke. In the driving stroke, the rotating rod rotates at a smaller angle, and the remaining angle after one rotation of the rotating rod is larger, so as to obtain a forward distance of 3 / 4 of the length of the art blade 4 in a smaller rotation stroke. At this time, an interval is set in the middle, and in the last section of the rotation stroke, set a rotating rod with a slightly smaller rotation radius and a smaller rotation angle (the "large" and "small" here are compared with the corresponding parameters of the previous rotating rod). At this time, the intermediate interval time is longer and can be used for punching. At the final stage of the rotation stroke, the latter rotating rod starts to rotate and drives the art blade 4 forward a distance of 1 / 4 of the length, thereby completing the feeding of the art blade 4.

[0071] The driving structure can also be configured so that multiple driving parts can individually control each rotating rod, and the rotating rod can realize customized rotation through the individually controlled driving parts. However, even if the rotation speed of multiple motors 10 is controlled by the electronic control system, in actual operation, if you want to realize assembly line production, it is inevitable that there will be rotation differences between multiple motors 10. Therefore, manual correction or other structures such as sensors are required for correction during use, or a more accurate motor 10 and control system are used, but this will increase costs and cause temporary suspension of production during correction, so it is not used as a preferred solution.

[0072] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and the specification only describe the principles of the present application. The present application may have various changes and improvements without departing from the spirit and scope of the present application, and these changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the attached claims and their equivalents.

Claims

1. A positioning fixture for utility knife production, characterized in that: The utility blade comprises a first limiting edge and a second limiting edge for limiting the outward movement of the utility blade to both sides, and a driving structure for driving the utility blade to move, wherein one or more gaps are formed at the second limiting edge, and the driving structure is arranged at the gaps of the second limiting edge; the driving structures are arranged in n numbers, wherein n is a positive integer, and the n driving structures rotate simultaneously and act on the opening grooves arranged on the surface of the utility blade in sequence, and finally the utility blade moves in the forward direction by a distance equal to a positive integer multiple of the length of the utility blade; when the driving structure rotates 360°, an action part of 60° to 150° is formed, and the driving structure acts and drives the action part with the opening groove; After the first driving structure leaves the opening slot, the second driving structure takes over immediately or takes over after a set time interval and performs the next stage of driving; A driving structure is correspondingly provided with a rotating rod. When the rotating rod rotates, the minimum value between its rotating end and the innermost side of the opening slot is greater than or equal to the rotating radius of the rotating rod. When the same rotating rod starts to act on the opening slot and finally leaves the opening slot, the angle between the driving structure and the utility blade is the same in the two states. The rotating rod and the opening slot interact with each other. After the rotating rod starts to contact the opening slot, the rotating rod rotates so that the opening slot moves forward with the utility blade in it. After moving forward a distance equal to a set multiple of the length of the utility blade, the rotating rod rotates at the same time until it starts to leave the opening slot, thereby completing the feeding at this stage. The angle of rotation of the rotating rod corresponding to the interaction portion between the rotating rod and the opening slot is below 120°; the rotating rod does not interact with the utility blade in the remaining angle range, and a pause interval is generated when all the rotating rods do not interact with the utility blade, and the pause interval is used to heat or cool the utility blade or perform other processes; The driving structures are provided with two or more numbers, all of which are provided with the same driving part for driving, and the plurality of driving structures enable all of the rotating rods to rotate in the same direction and at the same speed; the position where the rotating rod rotates to the beginning of connecting with the opening groove is the initial action point; the angle between the rotating rod and the utility blade at the initial action point is the initial angle, and the initial angles between two adjacent rotating rods have an angle difference, and the minimum value of the angle difference is the arc of the interactive part between the rotating rod and the utility blade, and the minimum value is also twice the complementary angle of the initial angle of the first rotating rod, so that after the previous rotating rod and the utility blade have completed their action, the next rotating rod will not pass through the initial action point in advance; After each portion where the rotating rod and the opening slot interact with each other passes, the utility blade moves in the forward direction by a distance of b times the length of the utility blade, where b is one-n or b is a positive integer.

2. The positioning fixture for utility knife production as claimed in claim 1, characterized in that: The angle range of interaction between each rotating rod and the utility blade is 30° to 120°.

3. The positioning fixture for utility knife production as claimed in claim 2, characterized in that: The initial angle of the rotating rod is 45°, and the rotating rods are arranged as rotating rod 1 and rotating rod 2. When each rotating rod rotates one circle, the utility blade moves forward a distance of half the length of the utility blade. The angle difference between the rotating rod 2 and the rotating rod 1 is within the union of 90° and 180°~270°. When the angle difference is 90°, after the rotating rod 1 and the opening slot of the utility blade have completed their action, they move a total distance of half the length of the utility blade. When the rotating rod 1 leaves the opening slot, , and then the rotating rod 2 enters the open slot, and after the action is completed, the utility blade moves forward a distance of half the length of the utility blade; when the angle difference is in the range of 180°~270°, after the rotating rod 1 rotates 90°, the rotating rod 2 needs to continue to rotate for a certain angle and then interact with the open slot, thereby generating the pause interval. The pause interval prevents the rotating rod 1 and the rotating rod 2 from interacting with the utility blade when they interact, and at the same time provides pause time for other processes.

4. The positioning fixture for producing utility knives according to claim 3, characterized in that: The straight-line distance between the two rotating rods and the utility blade is the same, and the two rotating rods have the same length; the rotating rods are arranged as rotating rod one and rotating rod two, the height of the bottom surface of rotating rod one is greater than the height of the top surface of rotating rod two, and the bottoms of rotating rod one and rotating rod two are both connected to the same driving part through a rotating shaft; the utility blade is limited at a certain height above the work surface, and the height of rotating rod one and rotating rod two is at least partially within the thickness range of the utility blade.

5. The positioning fixture for utility knife production as claimed in claim 1, characterized in that: The structures of the first limiting edge and the second limiting edge are the same, and both are material structures with the function of limiting the outward movement of the utility blade; the inner edges of the first limiting edge and the second limiting edge are smooth planes or arc surfaces, so as to limit the edges of the utility blade; the first limiting edge and the second limiting edge form two limiting surfaces spaced apart from each other, and when clamped, the utility blade is located between the two limiting surfaces, and the two limiting surfaces are respectively connected to the upper and lower surfaces of the utility blade to clamp the utility blade; or the first limiting edge and the second limiting edge include a plurality of rollers arranged at intervals, and the middle parts of the plurality of rollers have inner grooves to form a groove-like structure for limiting the utility blade.

6. The positioning fixture for producing utility knives according to any one of claims 2 to 4, characterized in that: The driving part is a motor, and the multiple rotating rods are all connected to a gear structure. The motor drive is provided with a main gear. The motor drives the main gear to rotate, and then drives the gear structure connected to the multiple rotating rods, thereby realizing the rotation of the multiple rotating rods in the same direction and at the same speed; the gear structure includes a plurality of sub-gears directly connected to the rotating rods and a transmission gear, wherein the transmission gear is meshed and arranged between the multiple sub-gears at intervals.

7. The positioning fixture for utility knife production as claimed in claim 1, characterized in that: The opening groove is configured as a groove at the top or middle position of the unsharpened side of the utility blade; or the opening groove is configured as a serrated protrusion on the unsharpened side of the utility blade.

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