High-precision roller type machine tool protective door

Abstract

The utility model provides a high accuracy roller formula machine tool protective door, including the protective door of L shape, the upper and lower ends of protective door are provided with upper roller and lower roller respectively, lower roller is clamped lower guide rail, upper roller is clamped upper guide rail, lower roller is provided with annular recess, lower guide rail is located the downside of lower roller, and is clamped in recess, the end face of upper guide rail is the U shape that opens upwards, and upper roller is equipped with two kinds, namely horizontal roller of horizontal arrangement and vertical roller of vertical arrangement, horizontal roller abuts the groove wall of upper guide rail, vertical roller abuts the groove bottom of upper guide rail, horizontal roller abuts U shape groove wall, and the freedom degree of vertical direction is restrained, prevents protective door to sway when operating, vertical roller abuts U shape groove bottom, bears main load and guarantees the positioning accuracy of vertical direction, and the stability of movement and guiding accuracy are improved significantly with double roller cooperation mechanism, overcome the defect that traditional roller guide rail gap is big, is easy to sway.

Description

Technical Field

[0001] This utility model relates to the field of machine tool protective door technology, specifically a high-precision roller-type machine tool protective door. Background Technology

[0002] Machine tools are core equipment in modern manufacturing, and their operational stability and precision directly affect machining quality. To prevent chips and coolant from splashing and to reduce noise, machine tools are typically equipped with L-shaped safety doors. These safety doors need to be opened and closed frequently, so their smoothness, reliability, and precision of movement are crucial.

[0003] Currently, to improve the smoothness of security door movement, the industry generally uses high-precision linear guides as guide components. Linear guides have advantages such as low friction coefficient, smooth movement, high precision, and good rigidity, effectively ensuring the smoothness and stability of the security door during frequent sliding. However, linear guides are very expensive, which directly increases the overall manufacturing cost of the machine.

[0004] To reduce costs, existing technologies have introduced a structure using rollers to engage guide rails, replacing linear guide rails. This solution uses V-shaped or U-shaped rollers that mesh with guide rails of corresponding shapes to achieve guiding and load-bearing functions, at a significantly lower cost than linear guide rails. However, this traditional roller-guide rail structure has obvious drawbacks: the fit between the rollers and the guide rail is relatively inaccurate, resulting in large movement gaps. This not only leads to poor stability during movement but also makes it prone to shaking and abnormal noises during operation.

[0005] Therefore, how to design a protective door guide mechanism that can significantly reduce costs while improving guiding accuracy and stability has become a technical problem that urgently needs to be solved in this field. Utility Model Content

[0006] To address the technical problems in the background art, this utility model discloses a high-precision roller-type machine tool protective door.

[0007] This utility model provides a high-precision roller-type machine tool protective door, including an L-shaped protective door. The upper and lower ends of the protective door are respectively provided with an upper roller and a lower roller. The lower roller is engaged with a lower guide rail, and the upper roller is engaged with an upper guide rail. The lower roller is provided with an annular groove, and the lower guide rail is located on the lower side of the lower roller and is engaged in the groove. The end face of the upper guide rail is U-shaped with an upward opening. The upper rollers are of two types: horizontally arranged horizontal rollers and vertically arranged vertical rollers. The horizontal roller abuts against the groove wall of the upper guide rail; The vertical roller abuts against the bottom of the groove of the upper guide rail.

[0008] Furthermore, a horizontal roller and a vertical roller are grouped together and placed adjacent to each other.

[0009] Furthermore, adjacent horizontal and vertical rollers are mounted on the same upper support.

[0010] Furthermore, the upper support is U-shaped with an opening facing downwards; a downward through-hole is provided on one side of the upper support; a horizontal roller is installed at the through-hole.

[0011] Furthermore, the bottom of the lower guide rail cavity is provided with an upwardly protruding support bar; the vertical roller abuts against the support bar.

[0012] Furthermore, the width of the support bar is greater than the width of the vertical roller, and there is a gap between the support bar and the side wall of the lower guide rail.

[0013] Furthermore, a retaining groove is provided at the lower end of the protective door; the retaining groove extends in the direction of movement of the protective door; and the lower roller is disposed in the retaining groove.

[0014] Furthermore, the protective door consists of a vertically arranged lower gate frame and an upper gate frame connected to the upper end of the lower gate frame; a downwardly inclined connecting plate is connected to the inner side of the lower gate frame near its lower end; the connecting plate and the lower area of ​​the lower gate frame form an inverted V-shaped retaining groove; the lower roller is located at the lower end of the connecting plate, on the side facing the lower gate frame.

[0015] Furthermore, a reinforcing plate connects the connecting plate and the lower gantry.

[0016] Furthermore, the reinforcing plate is composed of an upper plate, a middle plate, and a lower plate connected in sequence; the end of the upper plate is fixedly connected to the lower gantry; the middle plate is arranged at an angle and fits against the side of the connecting plate; the lower plate is arranged vertically; and the lower roller is installed on the side of the lower plate directly opposite the connecting plate.

[0017] The beneficial effects of this utility model are: 1. The horizontal rollers abut against the U-shaped groove wall, constraining the vertical degree of freedom and preventing the protective door from swaying during operation; the vertical rollers abut against the bottom of the U-shaped groove, bearing the main load and ensuring the vertical positioning accuracy; the double roller cooperation mechanism significantly improves the stability and guiding accuracy of the movement, overcoming the defects of large gaps and easy swaying of traditional roller guide rails.

[0018] 2. The tight fit between the rollers and the guide rails reduces collisions and vibrations caused by gaps, lowers operating noise, and extends the service life of the mechanism by dispersing stress through surface contact. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is the right view of this utility model; Figure 3 yes Figure 2 Enlarged view of point A in the middle; Figure 4 yes Figure 2 Enlarged view of point B in the middle; Figure 5 This is the front view of the upper scroll wheel; In the diagram: 1. Protective door; 2. Upper roller; 3. Lower roller; 4. Lower guide rail; 5. Upper guide rail; 6. Upper support; 11. Bar groove; 12. Lower gantry; 13. Upper gantry; 14. Connecting plate; 15. Reinforcing plate; 16. Lower support; 21. Horizontal roller; 22. Vertical roller; 31. Groove; 51. Support bar; 61. Notch; 141. Extension plate; 142. Support plate; 151. Upper plate; 152. Middle plate; 153. Lower plate. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0022] like Figure 1 and Figure 2 As shown, this utility model discloses a high-precision roller-type machine tool protective door, including an L-shaped protective door 1, which is composed of a vertically arranged lower frame 12 and a horizontally arranged upper frame 13.

[0023] like Figure 3 As shown, a lower roller 3 is provided at the lower end of the lower mast 12, which is engaged with a horizontally arranged lower guide rail 4 mounted on the machine tool frame. The lower roller 3 is located at both ends of the lower mast 12 at symmetrical positions. The lower roller 3 is provided with an annular groove 31 with a U-shaped cross-section. The lower guide rail 4 is a vertically arranged steel plate, which is engaged in the groove 31 to guide the movement of the lower roller 3. The groove wall of the groove 31 forms a flared V-shape, which serves as a guide to guide the lower guide rail 4 into the groove 31.

[0024] Since the lower roller 3 is exposed to the external environment, dust and impurities can easily enter the groove 31, and processing debris can also easily enter the groove 31 under the action of gravity, thus affecting the movement stability of the lower roller 3. Therefore, a baffle 11 is provided at the lower end of the protective door 1; the baffle 11 extends in the movement direction of the protective door 1; the lower roller 3 is located in the baffle 11.

[0025] The specific structure of the retaining groove 11 is as follows: a downwardly inclined connecting plate 14 is connected to the inner side of the lower gantry 12 near its lower end; the connecting plate 14 and the lower area of ​​the lower gantry 12 form an inverted V-shaped retaining groove 11. To improve the structural stability of the connecting plate 14, a reinforcing plate 15 is connected between the connecting plate 14 and the lower gantry 12. The reinforcing plate 15 is composed of an upper plate 151, a middle plate 152, and a lower plate 153 connected in sequence; the upper plate 151 is arranged horizontally, and its end is fixedly connected to the lower gantry 12 by welding; the middle plate 152 is arranged at an inclination and fits against the side of the connecting plate 14, and its joint is fixed by welding; the lower plate 153 is arranged vertically. A U-shaped, downward-opening lower support 16 is installed at the lower end of the lower plate 153, on the side opposite to the connecting plate 14. The lower roller 3 is installed inside the lower support 16, and the lower end of the lower roller 3 extends downward beyond the lower plate 153 and the lower support 16, allowing it to engage with the lower guide rail 4 without obstruction. With this arrangement, the lower roller 3 is protected not only by the lower support 16 but also by the retaining groove 11, making it difficult for dust and other impurities to enter the groove 31, thus enabling the lower roller 3 to operate stably for a long time.

[0026] Since the weight of the protective door 1 is mainly borne by the lower roller 3, the lower roller 3 is prone to damage. The initial deformation of the lower roller 3 is small and difficult to detect visually; therefore, continued use of the lower roller 3 increases the risk of greater problems, such as the protective door 1 falling off. To solve this problem, this embodiment also incorporates the following design: a vertically arranged extension plate 141 is connected to the lower end of the connecting plate 14, and an L-shaped support plate 142 is installed on the side of the extension plate 141 facing the lower plate 153; the lower end of the support plate 142 is horizontally arranged and extends towards the lower plate 153. The lower guide rail 4 is located directly above the horizontal portion of the lower end of the support plate 142, and the lower guide rail 4 is clearance-fitted with the horizontal portion of the lower end of the support plate 142. With this configuration, when the lower roller 3 is damaged, it will abut against the support plate 142, generating friction and noise. Therefore, the support plate 142 can be used to detect whether the lower roller 3 is damaged.

[0027] Two upper rollers 2 are symmetrically installed at both ends of the lower side of the upper gantry 13, and are engaged with the upper guide rail 5, which is horizontally arranged and installed on the upper end of the machine tool frame. The specific structure of the upper rollers 2 engaging with the upper guide rail 5 is as follows: Figure 4 As shown, the end face of the upper guide rail 5 is U-shaped with an upward opening. The upper roller 2 consists of horizontally arranged adjacent horizontal rollers 21 and vertically arranged vertical rollers 22, all mounted on an upper support 6 with a U-shaped end face and a downward opening. To provide movement space for the horizontal rollers 21, as shown... Figure 5 As shown, a downward through notch 61 is provided at the lower end of one side of the upper support 6, and the horizontal roller 21 is located at the notch 61. The horizontal roller 21 abuts against the groove wall of the upper guide rail 5; the vertical roller 22 abuts against the bottom of the groove of the upper guide rail 5.

[0028] Because the bottom of the groove of the upper guide rail 5 is uneven, it will affect the movement stability of the vertical roller 22; moreover, the bottom of the groove is far from the groove opening, and the vertical roller 22 may not be able to reach the bottom of the groove. Therefore, the bottom of the inner cavity of the upper guide rail 5 is provided with an integrally formed, upwardly protruding, and horizontally arranged support bar 51; the vertical roller 22 abuts against the support bar 51.

[0029] If the support bar 51 is too wide, it will increase the material usage and cause material waste; if the support bar 51 is too narrow, it will affect the movement stability of the vertical roller. Therefore, the width of the support bar 51 is greater than the width of the vertical roller 22, and there is a gap between the support bar 51 and the side wall of the lower guide rail 4.

[0030] Compared to existing technologies, the advantages of this embodiment are: 1. The horizontal roller 21 abuts against the U-shaped groove wall, constraining the vertical degree of freedom and preventing the protective door 1 from swaying during operation; the vertical roller 22 abuts against the bottom of the U-shaped groove, bearing the main load and ensuring the vertical positioning accuracy; the double roller cooperation mechanism significantly improves the stability and guiding accuracy of the movement, overcoming the defects of large gaps and easy swaying of traditional roller guide rails. 2. The tight cooperation between the rollers and the guide rails reduces collisions and vibrations caused by gaps, reduces operating noise, and extends the service life of the mechanism by dispersing stress through surface contact.

[0031] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A high-precision roller-type machine tool protective door, comprising an L-shaped protective door (1), wherein an upper roller (2) and a lower roller (3) are respectively provided at the upper and lower ends of the protective door (1), the lower roller (3) is engaged with a lower guide rail (4), and the upper roller (2) is engaged with an upper guide rail (5), characterized in that: The lower roller (3) is provided with an annular groove (31), and the lower guide rail (4) is located on the lower side of the lower roller (3) and is engaged in the groove (31); The end face of the upper guide rail (5) is U-shaped with an upward opening. The upper roller (2) is configured in two types: horizontal roller (21) arranged horizontally and vertical roller (22) arranged vertically. The horizontal roller (21) abuts against the groove wall of the upper guide rail (5); The vertical roller (22) abuts against the bottom of the groove of the upper guide rail (5).

2. The high-precision roller-type machine tool protective door according to claim 1, characterized in that: A horizontal roller (21) and a vertical roller (22) are set together and are adjacent to each other.

3. A high-precision roller-type machine tool protective door according to claim 2, characterized in that: The adjacent horizontal rollers (21) and vertical rollers (22) are mounted on the same upper support (6).

4. A high-precision roller-type machine tool protective door according to claim 3, characterized in that: The upper support (6) is U-shaped with the opening facing downwards; The upper support (6) has a downward through notch (61) on one side. The horizontal roller (21) is installed at the notch (61).

5. A high-precision roller-type machine tool protective door according to claim 1, characterized in that: The bottom of the inner cavity of the upper guide rail (5) is provided with an upwardly protruding support bar (51). The vertical roller (22) abuts against the support bar (51).

6. A high-precision roller-type machine tool protective door according to claim 5, characterized in that: The width of the support bar (51) is greater than the width of the vertical roller (22), and there is a gap between the support bar (51) and the side wall of the lower guide rail (4).

7. A high-precision roller-type machine tool protective door according to claim 1, characterized in that: The lower end of the protective door (1) is provided with a retaining groove (11). The retaining groove (11) extends in the moving direction of the protective door (1); The lower roller (3) is disposed in the retaining groove (11).

8. A high-precision roller-type machine tool protective door according to claim 7, characterized in that: The protective door (1) consists of a vertically arranged lower door frame (12) and an upper door frame (13) connected to the upper end of the lower door frame (12); The lower gantry (12) is connected to a downwardly inclined connecting plate (14) on its inner side near its lower end. The lower regions of the connecting plate (14) and the lower gantry (12) form an inverted V-shaped retaining groove (11). The lower roller (3) is located at the lower end of the connecting plate (14), on the side facing the lower gantry (12).

9. A high-precision roller-type machine tool protective door according to claim 8, characterized in that: A reinforcing plate (15) is connected between the connecting plate (14) and the lower gantry (12).

10. A high-precision roller-type machine tool protective door according to claim 9, characterized in that: The reinforcing plate (15) is composed of an upper plate (151), a middle plate (152) and a lower plate (153) connected in sequence; The end of the upper plate (151) is fixedly connected to the lower gantry (12); The middle plate (152) is arranged at an angle and fits against the side of the connecting plate (14); The lower plate (153) is arranged vertically; The lower roller (3) is installed on the side of the lower plate (153) directly opposite the connecting plate (14).

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