Safety door switch protection device for vertical machining center
By introducing a precise gap design between the safety guide sleeve and the guide column on the safety door of the vertical machining center, the problem of insufficient manufacturing precision caused by sheet metal welding is solved, ensuring that the switch insert can be smoothly inserted, improving the reliability and service life of the safety door switch, and reducing operating costs.
Patent Information
- Application Number
- CN202522597251.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-08
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-12-08
AI Technical Summary
The safety doors of existing machining centers are mostly manufactured using sheet metal welding technology, which makes it difficult to guarantee the manufacturing and movement accuracy of the door body. The switch inserts and plug holes are easily scratched, which can lead to deformation of the inserts, inability to insert into the hole, or damage to the switch, affecting the safety linkage logic and production efficiency.
The structure combines a safety guide sleeve and a safety guide post. Through precise gap design, the switch insert is pre-positioned to avoid scratching the insert against the socket and ensure that the insert smoothly enters the socket.
It improves the triggering reliability and service life of safety door switches, reduces equipment maintenance and spare parts replacement costs, and ensures the stability of safety linkage logic during the operation of the machining center.
Smart Images
Figure CN224927565U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of safety door switch protection technology, specifically a safety door switch protection device for a vertical machining center. Background Technology
[0002] In the wave of intelligent manufacturing, vertical machining centers have been widely used in high-precision industries such as aerospace and automotive manufacturing. As a core component ensuring the safety of personnel and equipment, the installation requirements for safety door switches are becoming increasingly urgent with the improvement of industry safety awareness. The core function of this switch is to establish a rigid linkage logic of "door status - equipment operation": when the safety door is opened, the rotation of the equipment spindle and the feed motion of each axis must be stopped immediately or reduced to safe parameters to prevent the risk of accidental contact by personnel; only when the safety door is fully closed and the switch is effectively triggered can the spindle and each axis resume normal machining. Therefore, its reliability and stability directly determine the safety protection level of the machining center.
[0003] However, most existing machining center safety doors are manufactured using sheet metal welding processes. Due to welding deformation and the rigidity of sheet metal, the manufacturing and movement accuracy of the door body is difficult to guarantee, and problems such as swaying and misalignment during closing are prone to occur. More importantly, the fit between the switch insert and the switch base depends entirely on the door body accuracy and lacks an independent positioning and guiding structure. This causes the insert to easily rub against the insertion hole during the closing process, which can lead to problems such as insert deformation, inability to insert into the hole, or even switch damage. This not only interrupts the production process and increases maintenance and spare parts costs, but may also cause the safety linkage logic to become disordered due to switch failure, creating a major safety hazard of equipment malfunction.
[0004] Therefore, developing a cost-effective and highly protective safety door switch protection device has become an urgent need to address the aforementioned pain points and improve the safety performance and production efficiency of machining centers. Utility Model Content
[0005] The purpose of this utility model is to provide a safety door switch protection device for vertical machining centers, which solves the following technical problems: Existing machining center safety doors are mostly manufactured using sheet metal welding processes. Due to welding deformation and sheet metal rigidity limitations, the manufacturing and movement accuracy of the door body is difficult to guarantee, and problems such as swaying and misalignment during closing are prone to occur. More importantly, the cooperation between the switch insert and the switch base depends entirely on the door body accuracy and lacks an independent positioning and guiding structure. This causes the insert to easily scrape against the insertion hole during the closing process, which in turn leads to problems such as insert deformation, inability to enter the hole, or even switch damage. This not only interrupts the production process and increases maintenance and spare parts costs, but may also cause safety linkage logic disorder due to switch failure, creating a major safety hazard of equipment malfunction.
[0006] The objective of this utility model can be achieved through the following technical solutions: A safety door switch protection device for a vertical machining center includes a left front door and a right front door. A switch insert and a safety guide sleeve are installed on one side of the upper surface of the left front door. A switch base adapted to the switch insert and a safety guide post adapted to the safety guide sleeve are installed on one side of the upper surface of the right front door. The switch base has a plug hole adapted to the switch insert.
[0007] As a further embodiment of this utility model: the thickness of the switch insert is 2mm and the width is 13mm.
[0008] As a further embodiment of this utility model: the safety guide sleeve and the switch insert are installed on the same side of the left front door, and the through hole diameter of the safety guide sleeve is φ8.0mm.
[0009] As a further embodiment of this utility model: the insertion hole is rectangular, and the width of the insertion hole is 15.3mm and the height is 4.4mm.
[0010] As a further embodiment of this utility model: the diameter of the safety guide post is φ7.5mm, and there is a clearance fit between the safety guide post and the safety guide sleeve.
[0011] As a further embodiment of this utility model: the center line of the switch insert in the thickness direction is aligned with the center line of the plug hole in the vertical direction, and the gap between the upper and lower edges of the switch insert and the upper and lower edges of the plug hole is 1.2mm; the center line of the switch insert in the width direction is aligned with the center line of the plug hole in the left and right direction, and the gap between the left and right sides of the switch insert and the left and right sides of the plug hole is 1.15mm.
[0012] As a further embodiment of this utility model: when the safety guide sleeve and the safety guide post are installed, their center lines are aligned, and the gap between them is 0.25mm.
[0013] As a further embodiment of this utility model: when the left front door and the right front door are closed, the safety guide post is inserted into the safety guide sleeve before the switch insert and forms a positioning.
[0014] The beneficial effects of this utility model are: (1) This utility model achieves pre-positioning of the switch insert before insertion by using the conical combination structure of the safety guide sleeve and the safety guide column and the precise gap design. This effectively avoids the problem of insufficient manufacturing precision caused by the welding of the sheet metal of the machining center door, and avoids the situation where the switch insert scrapes against the insertion hole, deforms or cannot be inserted into the hole, thus maximizing the protection of the safety door switch from damage. At the same time, at the cost of a small increase in cost, it greatly improves the triggering reliability and service life of the safety door switch, thereby improving the safety protection quality of the product, reducing the operating costs of equipment maintenance and spare parts replacement, and ensuring the stability of the safety linkage logic during the operation of the machining center.
[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description
[0016] The present invention will be further described below with reference to the accompanying drawings.
[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This utility model is a safety door device. Figure 1 A schematic diagram of the structure of part A in the enlarged view; Figure 3 This is a schematic diagram of the structure of the safety door opening insert and switch base of this utility model; Figure 4 This is a structural schematic diagram of the safety door guide sleeve and guide post of this utility model.
[0018] In the diagram: 1. Front left door; 2. Front right door; 3. Switch insert; 4. Switch base; 5. Safety guide sleeve; 6. Safety guide post; 7. Socket hole. Detailed Implementation
[0019] The embodiments of this utility model are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar symbols denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.
[0020] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0021] In the field of safety door switch technology, existing machining center doors are basically made of sheet metal welding, which makes it difficult to guarantee manufacturing precision. The safety door switch inserts are easily deformed by external forces, resulting in low reliability. Unreliable installation can cause the inserts to fail to fit into the holes, leading to switch damage. To address this, a method has been developed that effectively protects safety door switches, significantly improves their reliability, enhances product quality, and reduces operating costs with only a small increase in cost.
[0022] Example 1: Please refer to Figure 1 - Figure 4 As shown, a safety door switch protection device for a vertical machining center includes a left front door 1 and a right front door 2. A switch insert 3 is installed on one side of the upper surface of the left front door 1. The switch insert 3 has a thickness of 2mm and a width of 13mm. A safety guide sleeve 5 is installed on one side of the upper surface of the left front door 1. The safety guide sleeve 5 is on the same side as the switch insert 3. The through hole diameter of the safety guide sleeve 5 is φ8.0mm. A switch base 4 is installed on one side of the upper surface of the right front door 2. The switch base 4 is compatible with the switch insert 3. A safety guide post 6 is installed on one side of the upper surface of the right front door 2. The switch base 4 has a plug hole 7 that is compatible with the switch insert. The plug hole 7 is rectangular, with a width of 15.3 mm and a height of 4.4 mm. The safety guide post 6 has a diameter of φ7.5 mm and is compatible with the safety guide sleeve 5.
[0023] The thickness of the safety switch insert 3 is 2.0mm. The height dimension of the safety switch socket 4, which mates with the insertion hole 7, is 4.4mm. During installation, the center line of the safety switch insert 3 in the thickness direction should be aligned with the upper and lower center lines of the square insertion hole 7 of the safety switch socket 4. This results in a gap of 1.2mm between the upper and lower edges of the switch insert 3 and the upper and lower edges of the square hole in the socket in the height direction ((4.4mm-2.0mm) / 2=1.2mm). This is the ideal configuration. However, considering the possibility of safety margin of error, the gap between the upper and lower edges should be approximately 1.2mm. Similarly, the same applies to the width direction. During installation, align the center line of the safety switch insert 3 in the width direction with the center line of the square plug hole 7 of the safety switch socket 4. This way, the gap between the left and right sides of the switch insert 3 and the left and right sides of the square plug hole 7 of the switch socket 4 in the width direction is 1.15mm ((15.3mm-13.0mm) / 2=1.15mm). Considering the existence of safety error, the gap on the left and right sides is approximately 1.15mm.
[0024] When installing the safety guide sleeve 5 and the safety guide post 6, their center lines are aligned and the gap is 0.25 ((8.0mm-7.5mm) / 2=0.25mm). The gap is 0.25mm in all 360° directions. Since the safety guide sleeve 5 and the safety guide post 6 are in a clearance fit when the door is closed, the gap between the safety guide sleeve 5 and the safety guide post 6 around the perimeter is approximately 0.25mm after assembly.
[0025] Working principle: When the left front door 1 and right front door 2 of the machining center are closed, before the safety switch insert 3 enters the socket of the safety switch base 4, the safety guide post 6 has already inserted a certain distance into the safety guide sleeve 5. Since the switch insert 3 and the safety guide sleeve 5 are both installed on the left front door 1 and their relative positions are fixed, and the switch base 4 and the safety guide post 6 are installed on the right front door 2 and their relative positions are also fixed, this means that the safety guide sleeve 5 and the safety guide post 6 have pre-positioned the safety switch insert 3 and the safety switch base 4 before they are joined. This ensures that when the safety switch insert 3 is inserted into the safety switch base 4, the gap between the upper and lower sides of the switch insert 3 and the upper and lower sides of the square insertion hole 7 of the safety switch base 4 is approximately... The gaps between the left and right sides of the switch insert 3 and the left and right sides of the square insertion hole 7 of the safety switch base 4 are approximately (2.3mm-0.5mm) / 2=0.9mm. Both of these gaps are much larger than the 0.25mm gap between the safety guide sleeve 5 and the safety guide post 6. This effectively ensures that the safety switch insert 3 can be safely inserted into the square insertion hole 7 of the safety switch base 4 each time the door is closed, thereby effectively protecting the safety door switch, preventing the edges of the switch insert 3 and the insertion hole 7 from scraping or misaligning, ensuring the reliability of the safety switch triggering, and thus ensuring the safety protection effect during the operation of the machining center.
[0026] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A safety door switch protection device for a vertical machining center, characterized in that, Includes a left front door (1) and a right front door (2). A switch insert (3) and a safety guide sleeve (5) are installed on one side of the upper surface of the left front door (1). A switch base (4) adapted to the switch insert (3) and a safety guide post (6) adapted to the safety guide sleeve (5) are installed on one side of the upper surface of the right front door (2). A plug hole (7) adapted to the switch insert (3) is provided on the switch base (4).
2. The safety door switch protection device for a vertical machining center according to claim 1, characterized in that, The thickness of the switch insert (3) is 2mm and the width is 13mm.
3. The safety door switch protection device for a vertical machining center according to claim 1, characterized in that, The safety guide sleeve (5) and the switch insert (3) are installed on the same side of the left front door (1), and the through hole diameter of the safety guide sleeve (5) is φ8.0mm.
4. The safety door switch protection device for a vertical machining center according to claim 1, characterized in that, The insertion hole (7) is rectangular, and the width of the insertion hole (7) is 15.3 mm and the height is 4.4 mm.
5. The safety door switch protection device for a vertical machining center according to claim 1, characterized in that, The diameter of the safety guide post (6) is φ7.5mm, and there is a clearance fit between the safety guide post (6) and the safety guide sleeve (5).
6. The safety door switch protection device for a vertical machining center according to claim 1, characterized in that, The center line of the switch insert (3) in the thickness direction is aligned with the center line of the plug hole (7) in the vertical direction, and the gap between the upper and lower edges of the switch insert (3) and the upper and lower edges of the plug hole (7) is 1.2mm; the center line of the switch insert (3) in the width direction is aligned with the center line of the plug hole (7) in the left and right direction, and the gap between the left and right sides of the switch insert (3) and the left and right sides of the plug hole (7) is 1.15mm.
7. The safety door switch protection device for a vertical machining center according to claim 1, characterized in that, When the safety guide sleeve (5) and the safety guide post (6) are installed, their center lines are aligned and the gap between them is 0.25mm.
8. The safety door switch protection device for a vertical machining center according to claim 1, characterized in that, When the left front door (1) and the right front door (2) are closed, the safety guide post (6) is inserted into the safety guide sleeve (5) before the switch insert (3) and forms a positioning.