Tightness self-adjusting cutter structure

Abstract

The utility model relates to the technical field of cutting machines, in particular to a tightness self-adjusting cutter structure which comprises two supporting sliding rails, a driving device, a sliding cutter rest, a main cutter assembly and an auxiliary cutter assembly, the sliding cutter rest comprises an upper cutter rest and a lower cutter rest, and the driving device is used for driving the sliding cutter rest to move left and right on the supporting sliding rails. The main cutter assembly comprises a main cutter, a driving part and an elastic part, the main cutter is rotationally installed on the upper cutter frame, the auxiliary cutter structure comprises an auxiliary cutter rotationally installed on the lower cutter frame, the rear side face of the main cutter makes friction contact with the front side face of the auxiliary cutter, and the elastic part is installed on the upper cutter frame and used for pushing the main cutter to be close to the auxiliary cutter; due to the fact that the elastic piece is arranged on the upper cutter rest, when the main cutter and the auxiliary cutter are abraded in the using process, the main cutter and the auxiliary cutter can be always in contact under the action of the elastic piece, the shearing effect of plates is guaranteed, meanwhile, the replacement frequency of the main cutter and the auxiliary cutter in the production process is reduced, and the production and maintenance cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of cutting machine technology, specifically to a self-adjusting cutting blade structure. Background Technology

[0002] Cutting machines are common cutting equipment in modern industrial production. They are suitable for dividing and cutting sheet materials in various industries. They do not require any molds and are controlled by system software. They can directly cut products. As long as the corresponding parameters are set on the operating platform, the computer transmits the corresponding instructions to the cutting machine, and the cutting machine will quickly cut according to the received design drawings. The automation level is high.

[0003] A circular shear is a common tool on a cutting machine. Two circular blades work together to rotate synchronously to cut materials. For example, Chinese patent document CN220902015U discloses a slitting machine with a built-in edge-shredding function. The device includes a base, a fixed wall plate, a movable wall plate, an upper cutter shaft, and a lower cutter shaft. The fixed wall plate is fixedly installed on the base, and the movable wall plate is movably set on the base. One end of the upper cutter shaft and the lower cutter shaft are installed on the fixed wall plate. An upper shearing blade is installed on the upper cutter shaft, and a lower shearing blade and an edge-shredding disc are installed on the lower cutter shaft. The edge-shredding disc is located on one side of the two outermost lower shearing blades on the lower cutter shaft, and an edge-shredding blade is installed on the edge-shredding disc. Pushing the movable wall panel causes the other ends of the upper and lower cutter shafts to extend into their support holes. The two shafts are supported by the fixed and movable wall panels. The rotation of the upper and lower cutter shafts drives the shearing blades and the edge-breaking cutter disc to rotate synchronously, completing the longitudinal shearing and cutting off the waste edges of the steel plate. After the movable wall panel is detached from the upper and lower cutter shafts, the shearing blades or edge-breaking cutter disc can be replaced.

[0004] However, the above equipment also has certain drawbacks: the equipment achieves edge cutting of the board by synchronous rotation of the shearing blade and the edge-trimming disc, but the shearing blade and the edge-trimming disc are fixedly installed in the circumferential direction of the cutter shaft. When the shearing blade and the edge-trimming disc become loose or weary during long-term use, causing the shearing gap to widen, the shearing effect of the board will deteriorate, and there may be cases where the board cannot be cut or the blade is damaged, resulting in increased production costs and affecting normal production order. Utility Model Content

[0005] This invention provides a self-adjusting cutter structure that can automatically adjust the tension between two cutters, thus avoiding reduced cutting effect due to cutter wear.

[0006] To solve the above problems, the present invention provides a self-adjusting tension cutter structure with the following technical solution:

[0007] A self-adjusting cutting blade structure includes two support slide rails, a drive device, a sliding blade holder, a main cutting blade assembly, and a secondary cutting blade assembly. The sliding blade holder includes an upper blade holder and a lower blade holder. The drive device drives the upper and lower blade holders to move synchronously left and right on the two support slide rails respectively. The main cutting blade assembly includes a main cutting blade, a drive member, and an elastic member. The main cutting blade is rotatably mounted on the upper blade holder. The drive member drives the main cutting blade to rotate. The secondary cutting blade structure includes a secondary cutting blade rotatably mounted on the lower blade holder. The rear side of the main cutting blade and the front side of the secondary cutting blade are in frictional contact to drive the secondary cutting blade to rotate synchronously in the opposite direction. The elastic member is mounted on the upper blade holder and is used to push the main cutting blade closer to the secondary cutting blade.

[0008] This utility model discloses a self-adjusting cutting blade structure. By setting an elastic element on the upper blade holder, the main cutting blade can move closer to the secondary cutting blade under the pushing action of the elastic element. When the main and secondary cutting blades are worn during use, they can always maintain contact under the action of the elastic element, thereby avoiding the increase of the gap between the main and secondary cutting blades due to wear, ensuring the shearing effect of the sheet metal, and reducing the replacement frequency of the main and secondary cutting blades during the production process, thus reducing production and maintenance costs.

[0009] Furthermore, the main cutting blade assembly also includes a fixed shaft, a tapered moving part, a fixed bearing, a movable bearing, and a retaining ring. The fixed bearing is mounted on the upper blade holder, the fixed shaft passes through the fixed bearing, the movable bearing is nested on the upper blade holder and coaxially arranged with the fixed bearing, the tapered moving part is sleeved on the rear end of the fixed shaft and adjacent to the movable bearing, the main cutting blade is sleeved on the rear end of the fixed shaft and located behind the tapered moving part, and the elastic element is located between the tapered moving part and the main cutting blade.

[0010] Furthermore, the conical moving part has a ring structure with a conical surface on its rear side, and the elastic part is a spring ring, which is sleeved on the fixed shaft to cooperate with the conical moving part to push the main cutter backward.

[0011] Furthermore, the rear end of the fixed shaft has a boss for blocking the main cutter in the axial direction of the fixed shaft; the middle part of the fixed shaft has a positioning shoulder that mates with the fixed bearing; and the middle part of the fixed shaft, located in front of the fixed bearing, has a retaining groove for installing a retaining ring.

[0012] Furthermore, the driving component includes a timing belt and a timing pulley. The timing pulley is sleeved on the front end of the fixed shaft, and the timing belt is installed on the frame of the cutting machine. The timing belt and the timing pulley are in frictional engagement so that the timing pulley rotates while the driving device moves the upper blade holder.

[0013] Furthermore, the two support slide rails extend in the left-right direction and are arranged in parallel vertically. The upper tool post is slidably mounted on the upper support slide rail, and the lower tool post is slidably mounted on the lower support slide rail.

[0014] Furthermore, the driving device includes a drive motor and a transmission structure. There are two transmission structures, which are respectively mounted on two support slide rails and fixedly connected to the upper tool post and the lower tool post, respectively, for transmitting power to drive the upper tool post and the lower tool post to move along the corresponding support slide rails. The drive motor is mounted on the support slide rails, and its output end is connected to the two transmission mechanisms to drive the upper tool post and the lower tool post to move synchronously in the left and right directions.

[0015] The beneficial effects of the self-adjusting tension cutter structure provided by this utility model are:

[0016] 1. The self-adjusting cutting blade structure of this utility model, by setting an elastic element on the upper blade holder, allows the main cutting blade to move closer to the side of the secondary cutting blade under the pushing action of the elastic element. When the main cutting blade and the secondary cutting blade are worn during use, they can always maintain contact under the action of the elastic element, thereby avoiding the increase of the gap between the main cutting blade and the secondary cutting blade due to wear, ensuring the shearing effect of the board, and reducing the replacement frequency of the main cutting blade and the secondary cutting blade during the production process, thus reducing production and maintenance costs.

[0017] 2. By setting a timing belt on the frame of the cutting machine and a timing pulley that frictionally engages with the timing belt on the upper blade holder, the main cutter can rotate while moving left and right with the upper blade holder. Compared with the method of independently driving the cutter, the setting of timing belt and timing pulley reduces the complexity of the cutter structure and further improves the stability of equipment operation. Attached Figure Description

[0018] Figure 1 A schematic diagram of a self-adjusting cutter structure provided by this utility model;

[0019] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle;

[0020] Figure 3 for Figure 1 Exploded view of the main cutting blade assembly;

[0021] Figure 4 for Figure 1 Schematic diagram of the middle auxiliary cutter assembly;

[0022] Figure 5 This is a schematic diagram of the conical moving part;

[0023] Figure 6 This is a schematic diagram of a fixed shaft.

[0024] Figure 7 A diagram illustrating the combination of the main cutter and the secondary cutter.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Support rail; 2. Drive unit; 21. Drive motor; 3. Sliding tool holder; 31. Upper tool holder; 32. Upper slider; 33. Fixing bracket; 34. Mounting plate; 35. Lower tool holder; 36. Lower slider; 37. Fixing block;

[0027] 4. Main cutter assembly; 41. Main cutter; 42. Drive unit; 421. Synchronous belt; 422. Synchronous pulley; 423. Guide pulley; 43. Elastic element; 44. Conical moving element; 441. Top ring; 45. Fixed shaft; 451. Slot; 452. Shaft shoulder; 453. Stop; 46. Fixed bearing; 47. Moving bearing; 48. Adjusting bolt; 49. Snap ring; 5. Secondary cutter assembly; 51. Rotating shaft; 52. Positioning bearing; 53. Secondary cutter. Detailed Implementation

[0028] The principles and spirit of this utility model will be explained in detail below with reference to several representative embodiments.

[0029] Embodiment 1 of a self-adjusting cutter structure provided by this utility model:

[0030] like Figures 1 to 7 As shown, a self-adjusting cutting blade structure includes two support slide rails 1, a drive device 2, a sliding blade holder 3, a main cutting blade assembly 4, and a secondary cutting blade assembly 5. The two support slide rails 1 extend horizontally and are arranged parallel vertically, and are fixedly mounted on the frame of the cutting machine (not shown in the figure). The sliding blade holder 3 includes an upper blade holder 31 and a lower blade holder 35. The upper blade holder 31 is slidably mounted on the upper support slide rail 1, and the lower blade holder 35 is slidably mounted on the lower support slide rail 1. The main cutting blade assembly 4 is fixedly mounted on the upper blade holder 31, and the secondary cutting blade assembly 5 is fixedly mounted on the lower blade holder 35. The drive structure drives the upper blade holder 31 and the lower blade holder 35 to move synchronously left and right along the support slide rails 1, so that the main cutting blade assembly 4 and the secondary cutting blade assembly 5 cooperate to achieve stable cutting of the sheet material.

[0031] The driving structure will be introduced first below, such as Figure 1As shown, the driving structure includes a drive motor 21 and a transmission structure. The transmission structure includes a transmission belt and transmission pulleys, which are located inside the support slide rails 1. Each support slide rail 1 is a rectangular frame structure. Two transmission pulleys are installed horizontally at the left and right ends of each support slide rail 1. The transmission belt is wound around the two transmission pulleys within the same support slide rail 1. The drive motor 21 is installed at the right end of the lower support slide rail 1, with its output end facing upwards. The output shaft of the drive motor 21 is fixedly connected to the transmission pulleys at the right end of each support slide rail 1 to drive the transmission belts within each support slide rail 1 to move synchronously.

[0032] The upper tool post 31 and the lower tool post 35 are described below, such as Figure 2 As shown, the upper tool holder 31 includes an upper slider 32, a fixing frame 33, and a mounting plate 34. The upper slider 32 is a rectangular block that is slidably mounted on the front side of the upper support slide rail 1. The fixing frame 33 is a rectangular frame that is fixedly mounted on the front side of the slider. The mounting plate 34 is a rectangular plate extending vertically and is fixedly mounted on the front side of the fixing frame 33. The lower tool holder 35 includes a lower slider 36 and a fixing block 37. The lower slider 36 is a rectangular block that is slidably mounted on the front side of the lower support slide rail 1. The fixing block 37 is fixedly mounted on the front side of the lower slider 36.

[0033] The main cutter component 4 is described below, such as... Figure 3 , Figure 5 , Figure 6 and Figure 7 As shown, the main cutter assembly 4 includes a main cutter 41, a drive component 42, an elastic component 43, a tapered moving component 44, a fixed shaft 45, a fixed bearing 46, a moving bearing 47, an adjusting bolt 48, and a retaining ring 49. There are two fixed bearings 46, and the mounting plate 34 has mounting holes in which both fixed bearings 46 are fixedly installed. The fixed shaft 45 extends in the front-rear direction and passes through the two fixed bearings 46. The middle of the fixed shaft 45 has a shoulder 452, and the front side of the shoulder 452 has a groove 451 extending circumferentially along the outer circumferential surface of the fixed shaft 45. The groove 451 is used to install the retaining ring 49, so as to cooperate with the shoulder 452 to position the fixed shaft 45 in the axial direction of the two fixed bearings 46.

[0034] The movable bearing 47 is movably nested on the rear side of the mounting plate 34 and coaxially arranged with the fixed shaft 45. There are three adjusting bolts 48, which are all screwed to the front side of the mounting plate 34 in the front-back direction and are evenly distributed on the mounting plate 34 around the fixed shaft 45. The installation position of the adjusting bolts 48 corresponds to the outer ring of the movable bearing 47 and is used to adjust the position of the movable bearing 47 in the axial direction.

[0035] The fixed shaft 45 has a flat section at its rear end, located behind the shoulder 452. The conical moving part 44 and the main cutter 41 are both fitted onto the fixed shaft 45 via this flat section, allowing the main cutter 41 and the conical moving part 44 to rotate synchronously with the fixed shaft 45. The conical moving part 44 is an annular structure, installed adjacent to the movable bearing 47. The front side of the conical moving part 44 has a top ring 441 corresponding to the inner ring of the movable bearing 47, which abuts against the inner ring of the movable bearing 47. The main cutter 41 is a circular cutter, positioned adjacent to the rear side of the conical moving part 44, used to cooperate with the auxiliary cutter assembly 5 in cutting the sheet metal. The elastic element 43 is a spring coil, fitted onto the fixed shaft 45 and located between the main cutter 41 and the conical moving part 44. The rear side of the conical moving part 44 is a conical surface, on which the spring coil is fitted and pushes the main cutter 41 backward under its own elastic force. The rear end of the fixed shaft 45 has a stop 453, which is used to stop the main cutter 41 at the rear end of the fixed shaft 45.

[0036] The driving component 42 includes a synchronous belt 421, a synchronous pulley 422, and guide pulleys 423. The front end of the fixed shaft 45 has a flat section, and the synchronous pulley 422 is fitted onto the front end of the fixed shaft 45, maintaining synchronous rotation between the synchronous pulley 422 and the fixed shaft 45 through the flat section. There are two guide pulleys 423, fixed to the front side of the mounting plate 34 and located on the left and right sides above the synchronous pulleys 422. The synchronous belt 421 extends in the left-right direction and is fixed to the frame of the cutting machine. The synchronous belt 421 is located above the two guide pulleys 423 and passes between the two guide pulleys 423 and around the lower side of the synchronous pulley 422 to maintain frictional contact with the synchronous pulley 422.

[0037] like Figure 2 , Figure 4 and Figure 7 As shown, the secondary cutter assembly 5 includes a rotating shaft 51, a positioning bearing 52, and a secondary cutter 53. The rotating shaft 51 is rotatably mounted on the fixed block 37 via the positioning bearing 52. The secondary cutter 53 is a circular cutter, which is fixedly mounted at the front end of the rotating shaft 51 and located below the main cutter 41. The front side of the secondary cutter 53 has a shearing surface that cooperates with the main cutter 41. The upper end of the front side of the secondary cutter 53 is in frictional contact with the lower end of the rear side of the main cutter 41, so that the main cutter 41 drives the secondary cutter 53 to rotate synchronously in the opposite direction.

[0038] The working principle of the self-adjusting tension cutter structure provided by this utility model is summarized as follows:

[0039] First, driven by the drive motor 21, the upper blade holder 31 and the lower blade holder 35 move synchronously along the two support slide rails 1. At this time, under the action of the synchronous belt 421, the synchronous wheel 422 mounted on the upper blade holder 31 rotates while moving left and right with the upper blade holder 31, and then drives the main cutter 41 to rotate through the fixed shaft 45. Under the elastic force of the spring ring, the lower end of the rear side of the main cutter 41 always abuts against the upper end of the front side of the auxiliary cutter 53, so that the auxiliary cutter 53 can rotate synchronously in the opposite direction while the main cutter 41 rotates. When the wear of the main cutter 41 or the auxiliary cutter 53 is too great and exceeds the adjustment range of the spring ring, the position of the conical moving part 44 in the axial direction can be adjusted by adjusting the adjusting bolt 48, thereby adjusting the pushing force of the spring ring on the main cutter 41, ensuring the cutting effect while reducing the replacement frequency of the main cutter 41 and the auxiliary cutter 53, and reducing production and maintenance costs.

[0040] Embodiment 2 of the self-adjusting cutter structure provided by this utility model:

[0041] Its main difference from Example 1 is:

[0042] In Embodiment 1, the driving device includes a drive motor and a transmission structure. The transmission structure includes a transmission belt and a transmission wheel. The output end of the drive motor drives the transmission belt to move through the transmission wheel, thereby driving the upper or lower tool post to move left or right.

[0043] In this embodiment, the transmission structure includes electric cylinders, with the upper and lower tool posts fixed to the output ends of the two electric cylinders respectively, and moving synchronously left and right under the drive of the electric cylinders.

[0044] Based on the above description in this specification, those skilled in the art will also understand that the following terms used, such as "upper," "lower," "front," "rear," "left," "right," "width," "horizontal," "top," "bottom," "inner," and "outer," are terms indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings of this specification. They are only for the purpose of facilitating the explanation of the present invention and simplifying the description, and do not explicitly or implicitly suggest that the device or element involved must have the specific orientation, or be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms should not be understood or interpreted as limitations on the present invention.

[0045] In addition, in the description of this specification, "multiple" means at least two, such as two, three or more, etc., unless otherwise expressly and specifically defined.

Claims

1. A self-adjusting cutter structure, characterized in that, It includes two support slide rails, a drive device, a sliding blade holder, a main cutting blade assembly, and a secondary cutting blade assembly. The sliding blade holder includes an upper blade holder and a lower blade holder. The drive device is used to drive the upper and lower blade holders to move synchronously left and right on the two support slide rails respectively. The main cutting blade assembly includes a main cutting blade, a drive member, and an elastic member. The main cutting blade is rotatably mounted on the upper blade holder. The drive member is used to drive the main cutting blade to rotate. The secondary cutting blade assembly includes a secondary cutting blade rotatably mounted on the lower blade holder. The rear side of the main cutting blade and the front side of the secondary cutting blade are in frictional contact to drive the secondary cutting blade to rotate synchronously in the opposite direction. The elastic member is mounted on the upper blade holder and is used to push the main cutting blade closer to the secondary cutting blade.

2. The self-adjusting cutter structure according to claim 1, characterized in that, The main cutting blade assembly also includes a fixed shaft, a tapered moving part, a fixed bearing, a movable bearing, and a retaining ring. The fixed bearing is mounted on the upper blade holder, the fixed shaft passes through the fixed bearing, the movable bearing is nested on the upper blade holder and coaxially arranged with the fixed bearing, the tapered moving part is sleeved on the rear end of the fixed shaft and adjacent to the movable bearing, the main cutting blade is sleeved on the rear end of the fixed shaft and located behind the tapered moving part, and the elastic element is located between the tapered moving part and the main cutting blade.

3. The self-adjusting cutter structure according to claim 2, characterized in that, The conical moving part is a ring structure with a conical surface on its rear side. The elastic element is a spring ring, which is sleeved on the fixed shaft and used to cooperate with the conical moving part to push the main cutter backward.

4. The self-adjusting cutter structure according to claim 3, characterized in that, The rear end of the fixed shaft has a boss for blocking the main cutter in the axial direction of the fixed shaft; the middle part of the fixed shaft has a positioning shoulder that mates with the fixed bearing; and the middle part of the fixed shaft, located in front of the fixed bearing, has a retaining groove for installing a retaining ring.

5. The self-adjusting cutter structure according to claim 4, characterized in that, The driving component includes a timing belt and a timing pulley. The timing pulley is sleeved on the front end of the fixed shaft, and the timing belt is installed on the frame of the cutting machine. The timing belt and the timing pulley are in frictional engagement so that the timing pulley rotates while the driving device moves the upper blade holder.

6. The self-adjusting cutter structure according to claim 1, characterized in that, The two support slide rails extend in the left-right direction and are arranged in parallel vertically. The upper tool post is slidably mounted on the upper support slide rail, and the lower tool post is slidably mounted on the lower support slide rail.

7. The self-adjusting cutter structure according to claim 6, characterized in that, The driving device includes a drive motor and a transmission structure. There are two transmission structures, which are respectively mounted on two support slide rails and fixedly connected to the upper tool post and the lower tool post, respectively. They are used to transmit power to drive the upper tool post and the lower tool post to move along the corresponding support slide rails. The drive motor is mounted on the support slide rails, and its output end is connected to the two transmission mechanisms to drive the upper tool post and the lower tool post to move synchronously in the left and right directions.

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