Cutter limiting device

Abstract

The invention discloses a cut-off knife limiting device, relates to the technical field of cutting beds, and aims to solve the problem that an existing knife limiting device cannot limit forward deviation of a cut-off knife, the device comprises a rear top wheel assembly which is in rolling contact with the rear side face of the cut-off knife; the left and right side top wheel assemblies are detachably arranged at the bottom of the rear top wheel assembly and make rolling contact with the left side face and the right side face of the cutter. The front top wheel assembly is detachably arranged at the front ends of the left side top wheel assembly and the right side top wheel assembly, and the front top wheel assembly is in rolling contact with the front side face of the cutter, so that the offset of the cutter in the front direction, the rear direction, the left direction and the right direction can be limited, the cutter does not deviate from an ideal track, the cutting precision is guaranteed, and a cutter driving mechanism can be protected.

Description

Technical Field

[0001] The present invention relates to the technical field of cutting machines, and more particularly, to a cutting tool limiting device. Background Art

[0002] During the process of a cutting machine cutting fabric, especially when cutting waistband-like cut pieces, the movement trajectory of the cutting tool is usually a curve. Due to the influence of the cutting force of the fabric on the cutting tool during the cutting process, the fabric will push the cutting tool to deviate from its ideal movement trajectory, and this deviation may occur in the four directions of front, rear, left, and right. In order to ensure the cutting accuracy and quality, it is necessary to set up a cutting tool limiting device to limit the offset of the cutting tool in the above four directions, so as to ensure that the cutting tool can run along a predetermined track.

[0003] However, the existing cutting tool limiting devices have obvious limitations. They can only limit the offset of the cutting tool in the three directions of left, right, and rear, and cannot effectively limit the offset of the cutting tool in the forward direction. This defect causes the cutting tool to easily protrude forward when cutting waistband-like cut pieces. This forward protrusion phenomenon not only reduces the cutting accuracy of the cut pieces, but may even cause damage to the cut pieces. In addition, the forward thrust of the cutting tool will all act on the tool drive mechanism. Especially when cutting fabrics with greater resistance, this thrust will exacerbate the wear of the tool drive moving mechanism, resulting in an increase in the mechanism clearance, and further affecting the normal operation of the cutting head.

[0004] Therefore, how to solve the problem that the existing cutting tool limiting device cannot limit the forward offset of the cutting knife is an urgent problem to be solved by those skilled in the art at present. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a cutting tool limiting device, which can limit the offset of the cutting tool in the four directions of front, rear, left, and right, so that the cutting tool does not deviate from the ideal track, ensure the cutting accuracy, and can also protect the tool drive mechanism.

[0006] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0007] A cutting tool limiting device, comprising:

[0008] A rear top wheel assembly, which is in rolling contact with the rear side surface of the cutting tool;

[0009] A left and right side top wheel assembly, which is detachably arranged at the bottom of the rear top wheel assembly, and the left and right side top wheel assemblies are in rolling contact with the left side surface and the right side surface of the cutting tool;

[0010] A front top wheel assembly, which is detachably arranged at the front end of the left and right side top wheel assemblies, and the front top wheel assembly is in rolling contact with the front side surface of the cutting tool.

[0011] Preferably, the rear top wheel assembly includes a rear top wheel and a rear top wheel seat. The rear top wheel is rotatably connected to the rear top wheel seat. The outer wheel surface of the rear top wheel protrudes from the front end surface of the rear top wheel seat, and the outer wheel surface of the rear top wheel is in rolling contact with the rear side surface of the cutting knife.

[0012] Preferably, guard blades are provided on both sides of the rear top wheel seat. The guard blades extend along the length direction of the cutting knife, and the guard blades are in contact with both side surfaces of the cutting knife.

[0013] Preferably, the left and right side top wheel assemblies include a side top wheel seat, a left top wheel, and a right top wheel. The left top wheel and the right top wheel are arranged side by side and spaced apart at the front end of the side top wheel seat. The left top wheel and the right top wheel are both rotatably connected to the side top wheel seat. The left top wheel is in rolling contact with the left side surface of the cutting knife, and the right top wheel is in rolling contact with the right side surface of the cutting knife.

[0014] Preferably, both the left top wheel and the right top wheel are slidably connected to the side top wheel seat through a connection assembly. The connection assembly includes an adjusting bolt and a roller. Both the left top wheel and the right top wheel are connected to the adjusting bolt through a bearing. The end of the adjusting bolt is threadedly connected to the roller. The side top wheel seat is provided with a long hole for the roller to slide.

[0015] Preferably, the side top wheel seat includes a front side top wheel seat and a rear side top wheel seat. The front side top wheel seat and the rear side top wheel seat surround the outer periphery of the rear top wheel seat, and the front side top wheel seat and the rear side top wheel seat are connected by a connection bolt.

[0016] Preferably, the front top wheel assembly includes a front top wheel and a front top wheel seat. The front top wheel seat is of a U-shaped structure. The front top wheel seat is detachably arranged on the front side top wheel seat. The front top wheel is rotatably connected to the front top wheel seat. The outer wheel surface of the front top wheel protrudes from the inner end surface of the front top wheel seat, and the outer wheel surface of the front top wheel is in rolling contact with the front side surface of the cutting knife.

[0017] Preferably, sliding grooves for sliding connection with the front side top wheel seat are provided on both sides of the front top wheel seat, and sliding rails for cooperating with the sliding grooves are provided on both sides of the front side top wheel seat.

[0018] Preferably, the sliding groove can be one of a rectangular groove, a T-shaped groove, a dovetail groove, and a ball-bearing groove.

[0019] Preferably, the front top wheel seat is connected to the front side top wheel seat through a positioning pin, and the front top wheel seat is provided with a spring plunger for locking the positioning pin.

[0020] The cutter limiting device provided by the present invention includes a rear top wheel assembly, left and right side top wheel assemblies, and a front top wheel assembly. Specifically, the rear top wheel assembly is in rolling contact with the rear side of the cutter, and the rear top wheel assembly is used to limit the backward offset of the cutter. The left and right side top wheel assemblies are detachably arranged at the bottom of the rear top wheel assembly. The left and right side top wheel assemblies are in rolling contact with the left and right sides of the cutter, and the left and right side top wheel assemblies are used to limit the left and right offsets of the cutter. The front top wheel assembly is detachably arranged at the front end of the left and right side top wheel assemblies. The front top wheel assembly is in rolling contact with the front side of the cutter, and the front top wheel assembly is used to limit the forward offset of the cutter. By setting the rear top wheel assembly, left and right side top wheel assemblies, and front top wheel assembly, the offsets of the cutter in the four directions of forward, backward, left, and right are limited, so that the cutter can not deviate from the ideal track to ensure the cutting accuracy. Brief Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative work.

[0022] Figure 1 is a schematic structural diagram of the cutter limiting device provided by the present invention;

[0023] Figure 2 is a schematic structural diagram of the rear top wheel assembly provided by the present invention;

[0024] Figure 3 is an exploded view of the left and right side top wheel assemblies provided by the present invention;

[0025] Figure 4 is a partial top view of the cutter limiting device provided by the present invention;

[0026] Figure 5 is a partial schematic diagram of the cutter limiting device provided by the present invention;

[0027] Figure 6 is a schematic structural diagram of the front top wheel seat provided by the present invention;

[0028] Figure 7 is a partial exploded view of the front top wheel seat provided by the present invention.

[0029] Reference Signs:

[0030] 10 - cutter;

[0031] 1 - rear top wheel assembly, 11 - rear top wheel, 12 - rear top wheel seat, 13 - blade guard;

[0032] 2 - Left and right side top wheel assemblies, 21 - Side top wheel seat, 211 - Front side top wheel seat, 212 - Rear side top wheel seat, 213 - Connecting bolt, 22 - Left top wheel, 23 - Right top wheel, 24 - Adjusting bolt, 25 - Roller;

[0033] 3 - Front top wheel assembly, 31 - Front top wheel, 32 - Front top wheel seat, 321 - Slide groove;

[0034] 4 - Positioning pin;

[0035] 5 - Spring plunger. Specific embodiments

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0037] In the present invention, unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection", "fixation" and other terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0038] It should be noted that the following orientation words such as "up, down, front, back, left, right" are defined based on the accompanying drawings of the specification.

[0039] The core of the present invention is to provide a cutting knife limiting device, which can limit the offset of the cutting knife 10 in the front, back, left and right directions, so that the cutting knife 10 does not deviate from the ideal track, ensure the cutting accuracy, and can also protect the knife driving mechanism.

[0040] Please refer to Figure 1 , a cutting knife limiting device includes a rear top wheel assembly 1, a left and right side top wheel assembly 2 and a front top wheel assembly 3.

[0041] Specifically, the rear top wheel assembly 1 is in rolling contact with the rear side of the cutting knife 10. The rear top wheel assembly 1 is used to limit the backward offset of the cutting knife 10. The left and right side top wheel assemblies 2 are detachably arranged at the bottom of the rear top wheel assembly 1. The left and right side top wheel assemblies 2 are in rolling contact with the left side and the right side of the cutting knife 10. The left and right side top wheel assemblies 2 are used to limit the leftward and rightward offsets of the cutting knife 10. The front top wheel assembly 3 is detachably arranged at the front end of the left and right side top wheel assemblies 2. The front top wheel assembly 3 is in rolling contact with the front side of the cutting knife 10. The front top wheel assembly 3 is used to limit the forward offset of the cutting knife 10. By arranging the rear top wheel assembly 1, the left and right side top wheel assemblies 2 and the front top wheel assembly 3, the offsets of the cutting knife 10 in the front, rear, left and right directions are limited, so that the cutting knife 10 can not deviate from the ideal track, thereby ensuring the cutting accuracy.

[0042] For the cutting knife limiting device arranged in the above manner, when cutting a cutting piece, the offsets of the cutting tool in the front, rear, left and right directions are limited, so that the cutting tool does not deviate from the ideal track during operation, ensuring the cutting accuracy and protecting the tool driving mechanism.

[0043] Please refer to Figure 2 , the rear top wheel assembly 1 includes a rear top wheel 11 and a rear top wheel seat 12. The rear top wheel 11 is rotatably connected to the rear top wheel seat 12. The outer wheel surface of the rear top wheel 11 protrudes from the front end surface of the rear top wheel seat 12, and the outer wheel surface of the rear top wheel 11 is in rolling contact with the rear side of the cutting knife 10.

[0044] It should be noted that during use, the rear side of the cutting knife 10 contacts the rear top wheel 11. When the cutting knife 10 moves up and down, the rear top wheel 11 rolls up and down along the rear side of the cutting knife 10. Through the rolling contact between the rear top wheel 11 and the rear side of the cutting knife 10, the backward movement of the cutting knife 10 is restricted.

[0045] In the above situation, blade guards 13 are provided on both sides of the rear top wheel seat 12. The blade guards 13 extend along the length direction of the cutting knife 10, and the blade guards 13 are in contact with both side surfaces of the cutting knife 10.

[0046] It can be understood that by arranging the blade guards 13, the lateral swing of the cutting knife 10 during the working process can be reduced, making it more stable.

[0047] Please refer to Figure 3 and Figure 4 , the left and right side top wheel assemblies 2 include a side top wheel seat 21, a left top wheel 22 and a right top wheel 23. The left top wheel 22 and the right top wheel 23 are arranged in parallel and spaced apart at the front end of the side top wheel seat 21. The left top wheel 22 and the right top wheel 23 are both rotatably connected to the side top wheel seat 21. The left top wheel 22 is in rolling contact with the left side of the cutting knife 10, and the right top wheel 23 is in rolling contact with the right side of the cutting knife 10.

[0048] It should be noted that, when in use, the left side of the cutter 10 contacts the left top wheel 22, and the right side of the cutter 10 contacts the right top wheel 23. When the cutter 10 moves up and down, the left top wheel 22 rolls up and down along the left side of the cutter 10, and the right top wheel 23 rolls up and down along the right side of the cutter 10. The left top wheel 22 and the right top wheel 23 are in rolling contact with the left and right sides of the cutter 10, thereby limiting the movement of the cutter 10 to the left and right.

[0049] In the above embodiment, the left top wheel 22 and the right top wheel 23 are both slidably connected to the side top wheel seat 21 through a connecting assembly, the connecting assembly includes an adjusting bolt 24 and a roller 25, the left top wheel 22 and the right top wheel 23 are both connected to the adjusting bolt 24 through a bearing, the end of the adjusting bolt 24 is threadedly connected to the roller 25, and the side top wheel seat 21 is provided with a long hole for the roller 25 to slide.

[0050] When in use, the cutter 10 is placed between the left top wheel 22 and the right top wheel 23, and the left top wheel 22 and the right top wheel 23 are moved toward the side of the cutter 10, respectively, to drive the corresponding rollers 25 to move along the long hole. After the left top wheel 22 and the right top wheel 23 are moved to the side of the cutter 10, the adjusting bolts 24 corresponding to the left top wheel 22 and the right top wheel 23 are tightened to limit the position of the rollers 25 in the long hole, thereby fixing the positions of the left top wheel 22 and the right top wheel 23, so that the left top wheel 22 and the right top wheel 23 can roll along the side of the cutter 10. When the cutter 10 needs to be replaced, one of the adjusting bolts 24 can be loosened to move the corresponding top wheel away from the side of the cutter 10, and then the cutter 10 can be replaced.

[0051] In the non-working state, the rear top wheel 11 is in zero-gap contact with the back of the cutter 10, and the gaps between the left top wheel 22 and the right top wheel 23 and the side of the cutter 10 are no more than 0.05 mm, and the gaps are adjustable.

[0052] Please refer to Figure 3 and Figure 5 The side top wheel seat 21 includes a front top wheel seat 211 and a rear top wheel seat 212 , the front top wheel seat 211 and the rear top wheel seat 212 are arranged around the outer periphery of the rear top wheel seat 12 , and the front top wheel seat 211 and the rear top wheel seat 212 are connected by connecting bolts 213 .

[0053] It should be noted that, by providing the side top wheel seat 21 as a detachable structure, it is convenient to install and remove the side top wheel seat 21 from the rear top wheel seat 12 .

[0054] Please refer to Figure 4 and Figure 6, the front crown wheel assembly 3 includes a front crown wheel 31 and a front crown wheel seat 32. The front crown wheel seat 32 is of a U-shaped structure and is detachably provided on the front side crown wheel seat 211. The front crown wheel 31 is rotatably connected to the front crown wheel seat 32. The outer wheel surface of the front crown wheel 31 protrudes from the inner end surface of the front crown wheel seat 32, and the outer wheel surface of the front crown wheel 31 is in rolling contact with the front side surface of the cutting knife 10.

[0055] It can be understood that during use, the front side of the cutting knife 10 contacts the front crown wheel 31. When the cutting knife 10 moves up and down, the front crown wheel 31 rolls up and down along the front side of the cutting knife 10. Through the rolling contact between the front crown wheel 31 and the front side of the cutting knife 10, the forward movement of the cutting knife 10 is restricted.

[0056] As a preferred embodiment, sliding grooves 321 for sliding connection with the front side crown wheel seat 211 are provided on both sides of the front crown wheel seat 32, and slide rails for cooperating with the sliding grooves 321 are provided on both sides of the front side crown wheel seat 211.

[0057] It should be noted that by providing the sliding grooves 321 on both sides of the front crown wheel seat 32 and the slide rails on both sides of the front side crown wheel seat 211, the slide rails slide along the sliding grooves 321 to limit the positions of the front crown wheel seat 32 and the front side crown wheel seat 211, realizing the efficient connection between the two.

[0058] In the above situation, the sliding groove 321 can be one of a rectangular groove, a T-shaped groove, a dovetail groove, and a ball-bearing sliding groove 321.

[0059] It can be understood that when the sliding groove 321 is set as a rectangular groove, the structure is simple and easy to manufacture; when the sliding groove 321 is set as a T-shaped groove, better lateral stability can be provided; when the sliding groove 321 is set as a dovetail groove, it has a self-locking function and can prevent the components from accidentally sliding out; when the sliding groove 321 is set as a ball-bearing sliding groove 321, the friction is reduced through the balls, making the sliding smoother and more efficient.

[0060] Please refer to Figure 1 and Figure 7 , the front crown wheel seat 32 and the front side crown wheel seat 211 are connected by a positioning pin 4, and a spring plunger 5 for locking the positioning pin 4 is provided on the front crown wheel seat 32.

[0061] It should be noted that the front crown wheel seat 32 and the front side crown wheel seat 211 are inserted and connected by a slideway and positioned by the positioning pin 4. The positioning pin 4 has a locking structure, and the locking structure is a spring plunger 5. The spring plunger 5 can enable the positioning pin 4 to perform a one-way positioning part operation. It is not necessary to rotate a long distance of the thread to press the parts, so as to improve the work efficiency. Moreover, the assembly and disassembly are fast and the work is reliable, which can ensure that the positioning pin 4 will not shake or come out during work.

[0062] There are two grooves at both ends of the optical axis part of the positioning pin 4, and the spring plunger 5 is installed in the screw hole on the upper surface of the front top wheel seat 32. Insert the positioning pin 4 into the front top wheel seat 32. The positioning pin 4 jacks up the spring plunger 5. After the positioning pin 4 is inserted in place, the two grooves on the optical axis part of the positioning pin 4 are located directly below the spring plunger 5. The spring plunger 5 resets and falls under the action of elastic force, and the axial direction of the positioning pin 4 is limited by the spring plunger 5. To pull out the positioning pin 4, an additional force to pull out the positioning pin 4 is required to drive the positioning pin 4 to jack up the spring plunger 5 and pull out the positioning pin 4 from the front top wheel seat 32. During the process, the spring plunger 5 resets and falls under the action of elastic force.

[0063] When in use, insert the positioning pin 4, and the spring plunger 5 will lock the positioning pin 4 to fix the positions of the front top wheel seat 32 and the front side top wheel seat 211; pull out the positioning pin 4, and the locking relationship between the front top wheel seat 32 and the front side top wheel seat 211 can be unlocked, and the front top wheel seat 32 can be disassembled. In this way, the quick disassembly of the front top wheel seat 32 can be realized.

[0064] In summary, for the cutter limiting device provided by the present invention, the rear top wheel assembly 1 is composed of the rear top wheel 11 and the rear top wheel seat 12 and is the basic component of the whole device; the left and right side top wheel assemblies 2 are integrally installed on the rear top wheel assembly 1; the front top wheel assembly 3 is integrally installed on the left and right side top wheel assemblies 2 and has the function of quick disassembly and assembly.

[0065] The direction of the up and down movement of the front top wheel 31 relative to the cutter 10 during operation is fixed and does not move with the cutter 10. During operation, the front top wheel 31 always presses against the front side of the cutter 10 to ensure that the cutter 10 does not move forward during the operation; the front top wheel assembly 3 has the function of quick disassembly and assembly combination.

[0066] It should be noted that in this specification, relational terms such as first and second are only used to distinguish one entity from several other entities, and do not necessarily require or imply any actual relationship or order between these entities.

[0067] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0068] The above provides a detailed introduction to a cutter limiting device provided by the present invention. Specific examples are used in this article to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can still be made to the present invention, and these improvements and modifications also fall within the protection scope of the present invention.

Claims

1. A cutting knife limiting device, characterized in that: include: A rear top wheel assembly (1) is in rolling contact with the rear side of the cutting knife (10); Left and right top wheel assemblies (2) are detachably arranged at the bottom of the rear top wheel assembly (1), and the left and right top wheel assemblies (2) are in rolling contact with the left and right sides of the cutting knife (10); A front top wheel assembly (3) is detachably arranged at the front ends of the left and right top wheel assemblies (2), and the front top wheel assembly (3) is in rolling contact with the front side surface of the cutting knife (10).

2. The cutting knife limiting device according to claim 1, characterized in that: The rear top wheel assembly (1) comprises a rear top wheel (11) and a rear top wheel seat (12), the rear top wheel (11) being rotatably connected to the rear top wheel seat (12), the outer wheel surface of the rear top wheel (11) protruding from the front end surface of the rear top wheel seat (12), and the outer wheel surface of the rear top wheel (11) rollingly contacts the rear side surface of the cutting knife (10).

3. The cutting knife limiting device according to claim 2, characterized in that: Blade guards (13) are provided on both sides of the rear top wheel seat (12), the blade guards (13) extending along the length direction of the cutter (10), and the blade guards (13) contact two side surfaces of the cutter (10).

4. The cutting knife limiting device according to claim 2, characterized in that: The left and right top wheel assemblies (2) comprise a side top wheel seat (21), a left top wheel (22) and a right top wheel (23); the left top wheel (22) and the right top wheel (23) are arranged in parallel and at intervals at the front end of the side top wheel seat (21); the left top wheel (22) and the right top wheel (23) are both rotatably connected to the side top wheel seat (21); the left top wheel (22) is in rolling contact with the left side surface of the cutter (10); and the right top wheel (23) is in rolling contact with the right side surface of the cutter (10).

5. The cutting knife limiting device according to claim 4, characterized in that: The left top wheel (22) and the right top wheel (23) are both slidably connected to the side top wheel seat (21) via a connecting assembly, the connecting assembly comprising an adjusting bolt (24) and a roller (25), the left top wheel (22) and the right top wheel (23) are both connected to the adjusting bolt (24) via a bearing, the end of the adjusting bolt (24) is threadedly connected to the roller (25), and the side top wheel seat (21) is provided with a long hole for the roller (25) to slide.

6. The cutting knife limiting device according to claim 4, characterized in that: The side top wheel seat (21) comprises a front top wheel seat (211) and a rear top wheel seat (212); the front top wheel seat (211) and the rear top wheel seat (212) are arranged around the outer periphery of the rear top wheel seat (12); and the front top wheel seat (211) and the rear top wheel seat (212) are connected via connecting bolts (213).

7. The cutting knife limiting device according to claim 6, characterized in that: The front top wheel assembly (3) comprises a front top wheel (31) and a front top wheel seat (32); the front top wheel seat (32) is a U-shaped structure; the front top wheel seat (32) is detachably arranged on the front top wheel seat (211); the front top wheel (31) is rotatably connected to the front top wheel seat (32); an outer wheel surface of the front top wheel (31) protrudes from an inner end surface of the front top wheel seat (32); and the outer wheel surface of the front top wheel (31) is in rolling contact with the front side surface of the cutting knife (10).

8. The cutting knife limiting device according to claim 7, characterized in that: Slide grooves (321) slidably connected to the front top wheel seat (211) are provided on both sides of the front top wheel seat (32), and slide rails matching the slide grooves (321) are provided on both sides of the front top wheel seat (211).

9. The cutting knife limiting device according to claim 8, characterized in that: The slide groove (321) may be one of a rectangular groove, a T-shaped groove, a dovetail groove, and a slide groove with a ball bearing.

10. The cutting knife limiting device according to any one of claims 7 to 9, characterized in that: The front top wheel seat (32) is connected to the front top wheel seat (211) via a positioning pin (4), and the front top wheel seat (32) is provided with a spring plunger (5) for locking the positioning pin (4).

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