A rotary table limiting assembly of a rotary table type laser cutting machine

Abstract

This invention provides a turntable limiting component for a rotary laser cutting machine, belonging to the technical field of laser cutting equipment. It includes a turntable and a limiting mechanism; the limiting mechanism includes a spur gear meshing with the external teeth of the turntable, a mounting bracket fixed to the back of the turntable mounting plate, a left-hand threaded rod rotatably connected to the center of the mounting bracket, an internal threaded flange threaded to the threaded rod and a slider on its outer surface, an electronic limiting unit (including a proximity switch) mounted on the top of the mounting bracket, a mechanical limiting unit (including anti-collision blocks and buffer pads) located inside the mounting bracket, and an angle indicating unit (including an active conical tooth, a driven conical tooth, a pointer, and a dial) located at the front end of the mounting bracket. This invention solves the problems of existing limiting components having a small limiting range and being unable to determine the absolute angle of the turntable in the event of power failure or control system malfunction, achieving the dual functions of large-angle safety limiting and purely mechanical real-time angle indication.

Description

Technical Field

[0001] This invention relates to the field of laser cutting equipment technology, and in particular to a turntable limiting component for a turntable laser cutting machine. Background Technology

[0002] Rotary laser cutting machines achieve continuous multi-station processing through a rotating worktable. One of the core components is the rotary table limiting assembly. This assembly, installed on the side of the rotary table, limits its maximum rotation angle, preventing overtravel collisions and ensuring positioning accuracy and equipment safety during the cutting process. The limiting assembly is the "last line of defense" connecting mechanical motion and safety control; its performance directly determines the cutting machine's processing flexibility, reliability, and ease of maintenance.

[0003] Existing turntable limit components are mainly divided into two categories: electronic limiters and mechanical limiters. Electronic limiters typically rely on encoders or proximity switches to issue stop signals through the control system. Their advantages are fast response and adjustable angle, but they are susceptible to electromagnetic interference, signal delay, and power outages, posing a risk of failure. Mechanical limiters use physical blocks or pins to directly stop the turntable when it reaches its limit position. Their advantages are absolute reliability and no reliance on electricity. However, traditional mechanical limiters mostly use fixed blocks, which are limited by installation space and can generally only achieve single-turn or ±180° limit, making it difficult to meet the processing requirements of large-angle (such as 540°) continuous rotation.

[0004] Furthermore, existing limit components generally suffer from a lack of angular position sensing. Whether electronic or mechanical, they only function when the turntable reaches its limit position. During normal processing or when not in operation, operators cannot directly determine the absolute angle of the turntable. For example, when the equipment experiences an unexpected power outage or the control system malfunctions, electronic angle information is completely lost; and mechanical limit switches lack any visual indication. In such cases, operators can only manually rotate the machine to probe or remove the protective cover to observe, which is not only inefficient but also prone to causing turntable collisions or personal injury due to misjudgment. This deficiency is particularly prominent in scenarios such as equipment debugging, tooling replacement, and troubleshooting. Summary of the Invention

[0005] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0006] In view of the problems existing in the above and / or prior art, the present invention is proposed.

[0007] Therefore, the technical problem to be solved by the present invention is to overcome the shortcomings of existing limit components that cannot provide absolute angle information of the turntable when the power is off or the control system fails, and that the large angle limit range is limited.

[0008] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a turntable limiting component for a turntable laser cutting machine, comprising a turntable and a limiting mechanism; The limiting mechanism includes a spur gear meshing with the external teeth at the front end of the turntable, and a mounting bracket fixedly installed on the back of the turntable fixing plate. A threaded rod is rotatably connected to the center of the mounting bracket, and the front end of the threaded rod passes through the mounting bracket and is fixedly connected to the rear wall of the spur gear. An electronic limiting unit is fixedly installed at the top of the mounting bracket, and a mechanical limiting unit is provided inside the mounting bracket. An internal threaded flange is threadedly connected to the outer surface of the threaded section of the threaded rod, and a slider is fixedly installed on the outer surface of the internal threaded flange. An angle indicating unit is provided at the front end of the mounting bracket and located behind the spur gear.

[0009] As a preferred embodiment of the turntable limiting component of the turntable laser cutting machine of the present invention, the mounting bracket has symmetrical limiting grooves on its left and right sides, and the slider is cross-shaped with its two protruding ends slidably connected in the two limiting grooves respectively.

[0010] As a preferred embodiment of the rotary laser cutting machine turntable limiting assembly of the present invention, the electronic limiting unit includes a mounting plate fixedly installed on the upper surface of the mounting frame, the mounting plate having a mounting groove in the middle, and proximity switches being fixedly installed at the front and rear ends of the mounting groove by bolts.

[0011] As a preferred embodiment of the rotary laser cutting machine turntable limiting component of the present invention, the mechanical limiting unit includes anti-collision blocks symmetrically installed on the front and rear walls inside the mounting frame, and buffer pads are fixedly installed on the opposite surfaces of the two sets of anti-collision blocks.

[0012] In a preferred embodiment of the rotary laser cutting machine turntable limiting component of the present invention, the two anti-collision blocks are respectively located on the front and rear sides of the slider, and the horizontal distance between each anti-collision block and the slider is greater than the horizontal distance between the proximity switch on the same side and the slider.

[0013] As a preferred embodiment of the rotary laser cutting machine turntable limiting assembly of the present invention, the angle indicating unit includes an active conical tooth rotatably connected to the outer surface of the optical axis section of the threaded rod, and a protective frame fixedly installed at the front end of the mounting bracket. A scale is provided on the upper surface of the protective frame, and a pointer is rotatably connected to the center of the scale. A rotating rod is fixedly connected to the bottom end of the pointer, and the bottom end of the rotating rod penetrates the outer top wall of the protective frame and extends into it to be fixedly connected to a driven conical tooth. The driven conical tooth is engaged with the upper side of the active conical tooth.

[0014] In a preferred embodiment of the rotary laser cutting machine turntable limiting assembly of the present invention, the rotating rod is rotatably connected to the inner wall of the protective frame through a bearing, and the tip of the pointer points to the mark on the dial.

[0015] In a preferred embodiment of the rotary laser cutting machine turntable limiting component of the present invention, the threaded rod is a left-hand threaded rod.

[0016] The beneficial effects of this invention are: 1. This invention achieves a unified approach to both a wide angle range and dual safety redundancy in its limiting function. Through the passive meshing transmission of a spur gear and a left-hand threaded rod, the slider is driven to move linearly along the limiting groove. This, combined with the electronic pre-limiting of the proximity switches on both sides and the mechanical hard limiting of the anti-collision block and buffer pad, ensures that the distance between the anti-collision block and the slider is greater than the distance between the proximity switch and the slider, forming a sequential triggering logic of "electronic priority response, mechanical backup protection." This design not only breaks through the limitation of traditional fixed blocks that can only achieve limiting within ±180°, flexibly covering rotational requirements from 0° to 540° or even larger angles, but also avoids the failure risk of a single limiting method under power failure or signal interference, significantly improving the operational reliability and safety of the rotary laser cutting machine under complex working conditions.

[0017] 2. This invention innovatively integrates a purely mechanical absolute angle indicating unit. Without adding any burden to the power, sensor, or control system, it utilizes the rotational motion of the threaded rod to drive the active and driven bevel teeth and the pointer to deflect synchronously, achieving real-time visualization of the absolute angle of the turntable in conjunction with the dial. This unit can still operate reliably in extreme situations such as complete power failure or control system paralysis. Operators can directly and accurately read the current angle of the turntable through the pointer and dial, completely solving the pain point of "missing angle information" in existing limit components during debugging, maintenance, troubleshooting, and emergency manual reset. This greatly improves the maintainability and operational safety of the equipment. At the same time, it has a compact structure and low cost, and has outstanding practical value and commercial prospects. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein: Figure 1 This is a perspective view of the overall structure of the present invention; Figure 2 This is a perspective view of the limiting mechanism of the present invention; Figure 3 This is a three-dimensional side sectional view of the limiting mechanism of the present invention; Figure 4 This is a three-dimensional enlarged side sectional view of the connection between the angle indicator unit and the threaded rod of the present invention. Detailed Implementation

[0019] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0020] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0021] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0022] Example Reference Figures 1-4 The present invention provides a turntable limiting component for a turntable laser cutting machine, including a turntable 100 and a limiting mechanism 200 that works in conjunction with the turntable 100.

[0023] The limiting mechanism 200 is fixedly installed on the back of the fixed plate of the turntable 100 to limit the rotation angle of the turntable 100 and provide a visual indication of the angle. The limiting mechanism 200 is provided with a mounting bracket 202, which serves as the basic support component of the entire mechanism. The mounting bracket 202 is hollow inside and has a compact structure.

[0024] At the front end of the mounting bracket 202, a spur gear 201 is provided, which meshes with the external gear ring at the front end of the turntable 100. When the turntable 100 rotates around its axis, the spur gear 201 is driven synchronously, thereby transmitting the rotational motion of the turntable 100 to subsequent components without power loss.

[0025] A threaded rod 203 is rotatably connected at the center of the mounting bracket 202. Specifically, the threaded rod 203 is a left-hand threaded rod. The front end of the threaded rod 203 passes through the front wall of the mounting bracket 202 and is fixedly connected to the rear wall of the spur gear 201. Therefore, when the spur gear 201 rotates, it directly drives the threaded rod 203 to rotate synchronously, forming a purely mechanical transmission link from the turntable 100 to the threaded rod 203.

[0026] The threaded section of the threaded rod 203 is threadedly connected to an internally threaded flange 206, and a slider 207 is fixedly mounted on the outer surface of the internally threaded flange 206. When the threaded rod 203 rotates, the internally threaded flange 206 drives the slider 207 to perform linear reciprocating motion along the axial direction of the threaded rod 203, thereby converting the rotational motion into the linear displacement of the slider.

[0027] To ensure the guiding accuracy and stability of the slider 207 during movement, symmetrical limiting grooves 202a are provided on the left and right sides of the mounting bracket 202. Simultaneously, the slider 207 is designed with a cross-shaped structure, with its protruding ends slidingly engaged within the two limiting grooves 202a. In this way, the limiting grooves 202a not only constrain the direction of movement of the slider 207 but also withstand lateral loads, preventing the slider 207 from twisting.

[0028] An electronic limit unit 204 is fixedly mounted on the top of the mounting bracket 202. This unit sends an electrical signal in advance when the slider 207 approaches a preset position, thus achieving electronic pre-limiting. Specifically, the electronic limit unit 204 includes a mounting plate 204a, which is fixed to the upper surface of the mounting bracket 202. A long, narrow mounting groove 204b is formed in the middle of the mounting plate 204a. A proximity switch 204c is fixedly mounted at each end of the mounting groove 204b using bolts. The positions of the two proximity switches 204c correspond to the origin position and the maximum rotation angle position (e.g., 540°) of the turntable 100, respectively.

[0029] The mounting bracket 202 also houses a mechanical limiting unit 205, which provides final physical protection in case of electronic limit failure or overtravel of the turntable 100. The mechanical limiting unit 205 includes two sets of anti-collision blocks 205a, symmetrically mounted on the front and rear walls inside the mounting bracket 202. A buffer pad 205b is fixedly mounted on the opposite side of each set of anti-collision blocks 205a (i.e., the side facing the slider 207). The buffer pad 205b is made of elastic materials such as polyurethane or rubber and is used to absorb collision energy and reduce impact noise.

[0030] In terms of layout, the two anti-collision blocks 205a are located on the front and rear sides of the slider 207, respectively, and the horizontal distance between each anti-collision block 205a and the slider 207 is designed to be greater than the horizontal distance between the proximity switch 204c on the same side and the slider 207. Thus, when the slider 207 moves in a certain direction, the proximity switch 204c (electronic pre-limit) on that side will be triggered first. If the control system fails to stop the turntable 100 in time, the slider 207 will continue to move a short distance, eventually colliding physically with the anti-collision block 205a and the buffer pad 205b on that side, achieving mechanical hard limiting. This sequential logic of "electronic priority, mechanical backup" ensures dual reliability of the limit.

[0031] An angle indicating unit 208 is also provided at the front end of the mounting bracket 202 and located behind the spur gear 201. This unit is used to display the absolute angle of the turntable 100 in real time without relying on any electricity. The angle indicating unit 208 includes a driving bevel tooth 208a, which is rotatably connected to the outer surface of the optical axis section of the threaded rod 203. Therefore, when the threaded rod 203 rotates, the driving bevel tooth 208a is also driven to rotate.

[0032] A protective frame 208b is also fixedly mounted on the front end of the mounting bracket 202. The protective frame 208b is used to house and protect the internal transmission components. A dial 208c is provided on the upper surface of the protective frame 208b, and the dial 208c is marked with angle graduations from 0° to 540°. A pointer 208d is rotatably connected to the center of the dial 208c, and the tip of the pointer 208d points to the corresponding graduation mark on the dial 208c.

[0033] A rotating rod 208e is fixedly connected to the bottom end of the pointer 208d. The rotating rod 208e penetrates downward through the outer top wall of the protective frame 208b and extends into the interior of the protective frame 208b. A driven bevel tooth 208f is fixedly connected to the bottom end of the rotating rod 208e. The driven bevel tooth 208f meshes with the upper side of the driving bevel tooth 208a, thereby transmitting the rotational motion of the driving bevel tooth 208a to the pointer 208d. To reduce friction and ensure flexible rotation, the rotating rod 208e is rotatably connected to the inner wall of the protective frame 208b via a bearing.

[0034] When the turntable 100 rotates, the spur gear 201 drives the left-hand threaded rod 203 to rotate. The threaded rod 203 drives the internal threaded flange 206 and the slider 207 to perform linear motion to achieve the limiting function. On the other hand, it drives the active bevel gear 208a to rotate, which in turn drives the pointer 208d to deflect synchronously on the scale 208c through the driven bevel gear 208f and the rotating rod 208e. Since there is a fixed gear transmission ratio and thread lead relationship between the rotation angle of the threaded rod 203 and the rotation angle of the turntable 100, the deflection angle of the pointer 208d can accurately correspond to the current absolute angle of the turntable 100. Operators only need to directly observe the exposed pointer and scale to instantly and accurately know the angular position of the turntable 100 in the event of a complete power failure or control system failure, greatly improving the safety and convenience of equipment debugging, fault diagnosis, and emergency manual reset.

[0035] It should be noted that in the actual design and manufacturing process, the meshing transmission ratio between the spur gear 201 and the external gear ring at the front end of the turntable 100, the thread lead of the threaded rod 203, and the gear transmission ratio between the driving bevel gear 208a and the driven bevel gear 208f need to be pre-matched and calculated based on the maximum limiting angle of the turntable 100 (e.g., 540°). By reasonably setting the above transmission parameters, when the turntable 100 rotates from the origin position to the maximum limiting angle, the slider 207 moves linearly from one end to the other end within the mounting bracket 202, and at the same time, the pointer 208d deflects the corresponding indicating angle on the scale 208c. The matching of these transmission ratios and the selection of thread parameters are mature technologies that can be completed by those skilled in the art with the help of conventional mechanical design manuals. For example, by adjusting the gear ratio or the thread lead length, a precise linear correspondence between the rotation angle of the turntable 100 and the deflection angle of the pointer 208d can be achieved, thereby ensuring the accurate and reliable reading of the angle indicating unit 208.

[0036] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of the invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structurally equivalent but also equivalent in structure. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0037] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the invention as currently considered, or those features that are not relevant to implementing the invention) may be omitted.

[0038] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0039] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A rotary laser cutting machine rotary table limiting component, characterized in that: include, Turntable (100); and, The limiting mechanism (200) includes a spur gear (201) meshing with the external teeth at the front end of the turntable (100), and a mounting bracket (202) fixedly mounted on the back of the fixed plate of the turntable (100). A threaded rod (203) is rotatably connected at the center of the mounting bracket (202), and the front end of the threaded rod (203) passes through the mounting bracket (202) and is fixedly connected to the rear wall of the spur gear (201). An electronic limiting unit (204) is fixedly mounted at the top of the mounting bracket (202). A mechanical limiting unit (205) is provided inside the mounting bracket (202). An internal threaded flange (206) is threadedly connected to the outer surface of the threaded section of the threaded rod (203). A slider (207) is fixedly mounted on the outer surface of the internal threaded flange (206). An angle indicating unit (208) is provided at the front end of the mounting bracket (202) and on the rear side of the spur gear (201).

2. The rotary laser cutting machine rotary table limiting assembly as described in claim 1, characterized in that: The mounting bracket (202) has symmetrically provided limiting grooves (202a) on its left and right sides. The slider (207) is cross-shaped, and its two protruding parts are slidably connected in the two limiting grooves (202a).

3. The rotary laser cutting machine rotary table limiting assembly as described in claim 2, characterized in that: The electronic limit unit (204) includes a mounting plate (204a) fixedly mounted on the upper surface of the mounting bracket (202). The mounting plate (204a) has a mounting groove (204b) in the middle. Proximity switches (204c) are fixedly mounted on the front and rear ends of the mounting groove (204b) by bolts.

4. The rotary laser cutting machine rotary table limiting assembly as described in claim 3, characterized in that: The mechanical limiting unit (205) includes anti-collision blocks (205a) symmetrically installed on the front and rear walls inside the mounting frame (202), and buffer pads (205b) are fixedly installed on the opposite surfaces of the two sets of anti-collision blocks (205a).

5. The rotary laser cutting machine turntable limiting assembly as described in claim 4, characterized in that: The two anti-collision blocks (205a) are located on the front and rear sides of the slider (207) respectively, and the horizontal distance between each anti-collision block (205a) and the slider (207) is greater than the horizontal distance between the proximity switch (204c) on the same side and the slider (207).

6. The rotary laser cutting machine rotary table limiting assembly as described in claim 5, characterized in that: The angle indicating unit (208) includes an active conical tooth (208a) rotatably connected to the outer surface of the optical axis section of the threaded rod (203), and a protective frame (208b) fixedly installed at the front end of the mounting bracket (202). A scale (208c) is provided on the upper surface of the protective frame (208b). A pointer (208d) is rotatably connected to the center of the scale (208c). A rotating rod (208e) is fixedly connected to the bottom end of the pointer (208d). The bottom end of the rotating rod (208e) penetrates the outer top wall of the protective frame (208b) and extends into it, where a driven conical tooth (208f) is fixedly connected. The driven conical tooth (208f) meshes with the upper side of the active conical tooth (208a).

7. The rotary laser cutting machine turntable limiting assembly as described in claim 6, characterized in that: The rotating rod (208e) is rotatably connected to the inner wall of the protective frame (208b) via a bearing, and the tip of the pointer (208d) points to the mark on the dial (208c).

8. The rotary laser cutting machine rotary table limiting assembly as described in claim 7, characterized in that: The threaded rod (203) is a left-hand threaded rod.

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