A three-guide rail headstock crane structure

Abstract

The application discloses a three-guide rail main shaft box overhead crane structure and relates to the technical field of numerical control machine tool machining. The three-guide rail main shaft box overhead crane structure comprises a saddle and a main shaft box. The saddle is fixed with a sliding block, the main shaft box is fixed with a sliding rail, the sliding block is provided with a movable section, the movable section is rotationally connected to the sliding block, and the movable section has a first state of vertically supporting the sliding block to receive the sliding rail and a second state of being combined with the outer wall of the sliding rail after receiving the sliding rail. The three-guide rail main shaft box overhead crane structure can force the edge of the end of the sliding rail to move to the edge of the sliding groove in the process of the sliding rail being inserted into the sliding groove, thereby guiding the sliding rail to be inserted into the sliding groove and reducing the difficulty of installation between the sliding block and the sliding rail. After the movable section is switched to the second state, the movable section is combined with the outer wall of the sliding rail, so that the rigidity of the main shaft box is improved.

Description

Technical Field

[0001] This invention relates to the field of CNC machine tool processing technology, specifically to a three-guide rail spindle box overhead crane structure. Background Technology

[0002] The overhead gantry / cradle five-axis machining center is a high-precision CNC machining equipment widely used in aerospace, automotive manufacturing, mold making, and other fields. Its main feature is its ability to perform complex machining in multiple axes, providing high efficiency and high precision.

[0003] For example, the patent document with authorization announcement number CN220971642U, authorization announcement date May 17, 2024, and titled "A Five-Axis Machine Tool with More Flexible Chip Removal," includes a bed and a column. The top of the bed is fixedly connected to the column, and the top of the column is movably connected to a crossbeam. This device solves the problem of machine tool layout on site, especially in situations where factory space is limited, and the flexible arrangement can make the machine tool more practical.

[0004] In the existing technology, five-axis machine tools are equipped with multiple sets of sliders and slide rails. When installing the sliders and slide rails, they need to be aligned and move relative to each other along the axis. Obviously, the installation of multiple sets of sliders on a five-axis machine tool is quite cumbersome. Summary of the Invention

[0005] The purpose of this invention is to provide a three-rail spindle box crane structure to overcome the above-mentioned shortcomings in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A three-rail headstock crane structure includes a saddle and a headstock. A slider is fixed on the saddle, and a slide rail is fixed on the headstock. The slider is provided with:

[0008] The movable segment is rotatably connected to the slider, and the movable segment has a first state in which it is perpendicular to the slider to receive the slide rail and a second state in which it is in contact with the outer wall of the slide rail after receiving the slide rail.

[0009] In the above-mentioned three-rail main spindle box crane structure, slide rails are fixed on three sides of the main spindle box, and six sliders are correspondingly arranged on the saddle.

[0010] In the above-mentioned three-rail spindle box crane structure, a torsion spring is provided between the movable section and the slider.

[0011] In the aforementioned three-rail spindle box overhead crane structure, a lubrication mechanism is provided on the movable section.

[0012] The above-mentioned three-rail spindle box crane structure includes a connecting part that is rotatably connected to the slider and a lubrication part that is slidably connected to the connecting part. Two separation parts are also slidably connected to the connecting part.

[0013] In the above-mentioned three-rail spindle box crane structure, when the lubrication part is attached to the connecting part, the two separation parts approach each other and are attached to the side of the lubrication part away from the connecting part, so as to support the slide rail through the two separation parts; when the movable section is attached to the slide rail, the two separation parts are far away from each other, and the lubrication part is far away from the connecting part, so as to attach the slide rail through the lubrication part and the two separation parts.

[0014] In the above-mentioned three-rail spindle box crane structure, a first elastic element is provided between the connecting part and the lubrication part.

[0015] In the above-mentioned three-rail spindle box crane structure, the connecting part is provided with a movable groove, and the separating part is fixed with an L-shaped rod, one end of which is slidably connected in the movable groove.

[0016] In the above-mentioned three-rail spindle box crane structure, a second elastic element is provided in the movable groove to force the L-shaped rod to retract into the movable groove. The L-shaped rod has a wedge-shaped portion, and a driving element is slidably connected to the slider. The driving element has a wedge-shaped surface, and the connecting part has a through groove communicating with the movable groove. When the movable section is in the second state, the driving element can be inserted into the through groove to force the L-shaped rod to extend out of the movable groove through the wedge-shaped portion and the wedge-shaped surface.

[0017] In the above-mentioned three-guide rail spindle box overhead crane structure, the through groove passes through the connecting part. After the driving member forces the L-shaped rod to extend out of the movable groove so that the two separating parts and the lubrication part are misaligned, the side wall of the driving member abuts against the wedge-shaped part and the end abuts against the lubrication part, so that when the driving member penetrates into the through groove, it can force the lubrication part away from the connecting part.

[0018] In the above technical solution, the present invention provides a three-rail spindle box crane structure. When the slide rail is inserted into the slide groove, it abuts against the movable section in the first state and forces the movable section to rotate to the second state. During the process, the movable section can force the edge of the slide rail end to move to the edge of the slide groove, thereby guiding the slide rail to be inserted into the slide groove, thus reducing the difficulty of installation between the slider and the slide rail. After the movable section switches to the second state, it fits against the outer wall of the slide rail. In this way, multiple movable sections can act as extensions of the slider to improve the stability of the connection between the slide rail and the slider, and further improve the rigidity of the spindle box. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0020] Figure 1 This is a schematic diagram of the overall structure provided for an embodiment of the present invention;

[0021] Figure 2 A top view provided for an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the first state structure of the active segment provided in another embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the second state structure of the active segment provided in another embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram of the first state structure of the active segment provided in another embodiment of the present invention;

[0025] Figure 6 This is a schematic diagram of the second state structure of the active segment provided in another embodiment of the present invention;

[0026] Figure 7 This is a schematic diagram of a support structure provided in another embodiment of the present invention;

[0027] Figure 8 A schematic diagram of a lubrication mechanism provided in another embodiment of the present invention;

[0028] Figure 9 This is a schematic diagram of the internal structure of the movable groove provided in another embodiment of the present invention;

[0029] Figure 10 This is a schematic diagram of a wedge-shaped part structure provided in another embodiment of the present invention;

[0030] Figure 11 This is a schematic diagram of a wedge-shaped surface structure provided in another embodiment of the present invention;

[0031] Figure 12 This is a schematic diagram of the trigger section structure provided in another embodiment of the present invention;

[0032] Figure 13 This is a schematic diagram of a baffle structure provided in another embodiment of the present invention.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1. Saddle; 2. Spindle box; 3. Slider; 4. Slide rail; 5. Moving section; 6. Stop; 7. Lubrication mechanism; 8. Connecting part; 9. Lubrication part; 10. Separating part; 11. Bracket; 12. First elastic element; 13. Moving groove; 14. L-shaped rod; 15. Second elastic element; 16. Wedge-shaped part; 17. Driving element; 18. Wedge-shaped surface; 19. Through groove; 20. Sliding part; 21. Slide rod; 22. Baffle; 23. Third elastic element; 24. Trigger part; 25. Slot. Detailed Implementation

[0035] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0036] Reference Figure 1-13 This invention provides a three-rail main spindle box crane structure, including a saddle 1 and a main spindle box 2. A slider 3 is fixed on the saddle 1, and a slide rail 4 is fixed on the main spindle box 2. A movable section 5 is provided on the slider 3. The movable section 5 is rotatably connected to the slider 3. The movable section 5 has a first state of being perpendicular to the slider 3 to receive the slide rail 4 and a second state of being in contact with the outer wall of the slide rail 4 after receiving the slide rail 4.

[0037] Specifically, the cradle five-axis machine tool, also known as a five-axis machining center, is a high-tech, high-precision machining center specifically designed for processing complex curved surfaces. It features high efficiency and high precision. The gantry crane design refers to the cradle five-axis machine tool being equipped with a gantry crane structure. The spindle box 2 of the cradle five-axis machine tool is mounted on the gantry structure, allowing the workpiece held on the machine tool to be processed using the cutting tools on the spindle box 2. The cradle five-axis machine tool is equipped with multiple sets of sliders 3 and slide rails 4. Generally, one slider 3 slides on one slide rail 4, but two sliders 3 can also slide on it. Multiple slide rails 4 can be fixed on the spindle box 2, and correspondingly, multiple sliders 3 can be fixed on the saddle 1, allowing the spindle box 2 to slide stably along the Z-axis on the saddle 1. Corresponding slide rails 4 can also be installed between the saddle 1 and the gantry structure, as well as between the gantry structure and the main body of the cradle five-axis machine tool, to allow the spindle box 2 to move in multiple directions. All of the above are existing technologies and will not be elaborated upon here. The innovation of this embodiment of the invention lies in that the slider 3 has a groove along its axial direction that is adapted to the slide rail 4, and the slide rail 4 is slidably connected in the groove; the movable section 5 is rotatably connected to the slider 3, and has a first state perpendicular to the slider 3 (e.g., Figure 3 (as shown) and the second state (as shown) parallel to slider 3 to form the extension of slider 3. Figure 4As shown), a rotating structure (such as a motor) can be provided on the slider 3 to force the movable segment 5 to rotate between the first state and the second state; multiple movable segments 5 can be provided on the slider 3, and multiple movable segments 5 simultaneously in the second state can form multiple extensions of the slider 3 to indirectly extend the length of the slider 3; when the movable segment 5 is in the second state, one end of it is in contact with the end of the slider 3, and when the movable segment 5 is in the first state, one end of it is on the extension of the slide groove axis, so that the slide rail 4 will abut against the movable segment 5 in the first state during the insertion of the slide groove; if multiple movable segments are provided on the slider 3 5. The slide rail 4 can simultaneously force multiple movable segments 5 in the first state to switch to the second state. During the process, multiple movable segments 5 can force the edge of the slide rail 4 end to move to the edge of the slide groove, thereby guiding the slide rail 4 to insert into the slide groove, thus reducing the difficulty of installation between the slider 3 and the slide rail 4. After switching to the second state, multiple movable segments 5 simultaneously fit against the outer wall of the slide rail 4. This allows multiple movable segments 5 to act as extensions of the slider 3 to improve the stability of the connection between the slide rail 4 and the slider 3, and further improve the rigidity of the spindle box 2 (to minimize the shaking of the spindle box 2 and the slide rail 4 on the saddle 1).

[0038] In another embodiment of the present invention, slide rails 4 are fixed on three sides of the spindle box 2, and six sliders 3 are correspondingly provided on the saddle 1. Specifically, one slide rail 4 on the spindle box 2 is simultaneously slidably connected to two sliders 3 on the saddle 1, thereby improving the stability of the spindle box 2. In the prior art, two slide rails 4 are generally provided between the spindle box 2 and the saddle 1, and the two slide rails 4 are concentrated on the side of the spindle box 2 near the saddle 1. Furthermore, the drive screw of the spindle box 2 is generally located on the side of the spindle box 2 near the saddle 1. This arrangement makes the rigidity of the spindle box 2 relatively weak, and the distance between the spindle centerline (the force center of the tool cutting on the spindle box 2) and the Z-axis center and the X-axis center (the driving force center during cutting) is relatively large. The vibration amplitude of the tool on the spindle box 2 is too large. In this embodiment, three slide rails 4 are set on the spindle box 2, and the three slide rails 4 are respectively set on the three sides of the spindle box 2 (one side close to the saddle 1 and two sides adjacent to that side). At the same time, the drive screw of the spindle box 2 is deflected by 45 degrees from the position of the spindle box 2 close to the saddle 1, so that the drive screw of the spindle box 2 is in the position between two adjacent slide rails 4. This reduces the distance between the spindle center and the Z-axis center and X-axis center, making the structure more compact, thereby increasing the rigidity of the spindle box 2 and minimizing the vibration amplitude of the tool on the spindle box 2.

[0039] Furthermore, a torsion spring (not shown) is provided between the movable segment 5 and the slider 3. Specifically, in the above embodiment, a rotating structure is required on the movable segment 5 to drive the movable segment 5 to rotate on the slider 3. In this embodiment, a stop block 6 is provided on the slider 3. The torsion spring can force the movable segment 5 to rotate to the first state and abut against the stop block 6. When the end of the slide rail 4 abuts against the movable segment 5 in the first state, the movable segment 5 can overcome the elastic force of the torsion spring and rotate to the second state. The advantage of this arrangement is that the torsion spring keeps the movable segment 5 in the first state under normal conditions, and passively switches it to the second state when it is abutted by the slide rail 4.

[0040] Preferably, the movable segment 5 is provided with a lubrication mechanism 7. When the movable segment 5 is in the second state, the side wall of the movable segment 5 abuts against the outer side of the slide rail 4. In order to reduce the friction between the two, a lubrication mechanism 7 is provided on the side wall of the movable segment 5. The lubrication mechanism 7 can be a ball lubrication mechanism 7 in the prior art (this is prior art and will not be described in detail here), so that when the slide rail 4 moves relative to the slider 3, it can drive the balls to rotate, thereby reducing the friction. Furthermore, lubricating oil can be filled between several balls to further reduce the friction between the movable segment 5 and the slide rail 4.

[0041] In the above embodiments, the movable segment 5 adopts an integral structure. In another embodiment provided by the present invention, the movable segment 5 adopts a split structure. Further, the movable segment 5 includes a connecting part 8 rotatably connected to the slider 3 and a lubrication part 9 slidably connected to the connecting part 8. Two separation parts 10 are also slidably connected to the connecting part 8. Specifically, a bracket 11 is constructed on the slider 3, a stop block 6 is constructed on the bracket 11, the connecting part 8 is rotatably connected to the bracket 11, and the lubrication part 9 is slidably connected to the side of the connecting part 8 away from the bracket 11 (slidably arranged along the width direction of the connecting part 8). A lubrication mechanism 7 is arranged on the lubrication part 9 (a circulation channel is constructed on the side of the lubrication part 9 away from the connecting part 8, and several balls are arranged in the circulation channel. The friction can be reduced by the several balls abutting against the outer wall of the slide rail 4, such as...). Figure 8 As shown (this is prior art, and will not be described in detail here); two separation parts 10 are provided, and both separation parts 10 are slidably connected to the connecting part 8 (slidably disposed along the length direction of the connecting part 8); in this embodiment, a torsion spring is located between the connecting part 8 and the bracket 11, so as to force the connecting part 8, the lubrication part 9 and the separation part 10 to rotate to a position perpendicular to the slider 3, and to force the connecting part 8 to abut against the stop block 6 (e.g. Figure 5(As shown); Two sets of driving structures can be provided on the connecting part 8. One set of driving structures (such as an electric push rod or a cylinder) drives the lubrication part 9 to move along the connecting part 8, and the other set of driving structures (such as a lead screw structure) drives the two separating parts 10 to move closer to or further away from each other. With this arrangement, when the lubrication part 9 is in contact with the connecting part 8, the two separating parts 10 move closer to each other and are in contact with the side of the lubrication part 9 away from the connecting part 8, so as to support the slide rail 4 through the two separating parts 10; when the movable section 5 is in contact with the slide rail 4, the two separating parts 10 move further away from each other, and the lubrication part 9 moves away from the connecting part 8, so as to fit the slide rail 4 through the lubrication part 9 and the two separating parts 10.

[0042] In the above embodiment, the lubrication mechanism 7 can reduce the friction between the movable section 5 and the slide rail 4 when the movable section 5 is in the second state. However, when the movable section 5 is in the first state, the lubrication mechanism 7 directly bearing the slide rail 4 will cause damage to the lubrication mechanism 7, and there is also a risk of lubricating oil leakage in the lubrication mechanism 7. In this embodiment, two integral movable sections 5 are arranged opposite each other on the slider 3. The lubrication mechanism 7 is not provided on the two integral movable sections 5. A split movable section 5 is provided between the two integral movable sections 5 so as to guide the slide rail 4 through multiple movable sections 5 (e.g., Figure 5 and Figure 6 As shown, Figure 7 The two integral movable sections 5 are omitted in the text. For the split movable section 5, when the movable section 5 is in the first state, the two separate parts 10 are close to each other and fit against the side of the lubrication part 9 away from the connecting part 8. At this time, the slide rail 4 can be supported by the two separate parts 10 when it is inserted into the slide groove. After the movable section 5 switches to the second state, the two separate parts 10 are controlled to move away from each other until the distance between the two separate parts 10 is the same as the width of the lubrication part 9. Then, the lubrication part 9 is controlled to move away from the connecting part 8, so that the lubrication part 9 can fit against the outer wall of the slide rail 4. The advantage is that by changing the position of the lubrication part 9 and the separate parts 10, the movable section 5 can support the slide rail 4 through the separate parts 10 when it is in the first state, and can abut against the outer wall of the slide rail 4 through the lubrication part 9 when it is in the second state. At the same time, the two separate parts 10 also fit against the outer wall of the slide rail 4. This protects the lubrication mechanism 7 on the lubrication part 9 during the process of supporting the slide rail 4, and ensures the use of the lubrication mechanism 7 after supporting the slide rail 4, thus minimizing the friction between the movable section 5 and the slide rail 4.

[0043] As an alternative to the two sets of driving structures that drive the lubrication section 9 and the separation section 10, preferably, a first elastic element 12 is provided between the connecting section 8 and the lubrication section 9. A movable groove 13 is constructed on the connecting section 8, and an L-shaped rod 14 is fixed on the separation section 10, with one end of the L-shaped rod 14 slidably connected within the movable groove 13. A second elastic element 15 is provided within the movable groove 13 to force the L-shaped rod 14 into the movable groove 13. A wedge-shaped portion 16 is constructed on the L-shaped rod 14, and a driving element 17 is slidably connected to the slider 3. A wedge-shaped surface 18 is constructed on the driving element 17, and a through groove 19 communicating with the movable groove 13 is constructed on the connecting section 8. When the movable section 5 is in the second state, the driving element 17 can be inserted into the through groove 19 to force the L-shaped rod 14 out of the movable groove 13 through the wedge-shaped portion 16 and the wedge-shaped surface 18. Specifically, the lubrication part 9 has a sliding part 20, and the connecting part 8 has a fitting groove. The sliding part 20 is slidably connected in the fitting groove. The first elastic member 12 can be a spring structure from the prior art, with one end fixed to the inner wall of the fitting groove and the other end fixed to the sliding part 20, so that the lubrication part 9 is forced away from the connecting part 8 by the first elastic member 12. The sliding part 20 has a limited stroke in the fitting groove, so that the sliding stroke of the lubrication part 9 is the same as the thickness of the separating part 10. The movable groove 13 is arranged along the length direction of the connecting part 8, and the two separating parts... Each of the two L-shaped rods 14 is fixed to the separating part 10. One end of the L-shaped rod 14 is fixed to the side wall of the separating part 10, and the other end extends into the movable groove 13, so that the separating part 10 can slide along the movable groove 13 via the L-shaped rod 14. The two L-shaped rods 14 are staggered in the height direction of the connecting part 8 to avoid interference between the two separating parts 10 when they are close to or far from each other. The second elastic element 15 can be a spring structure from the prior art. One end of the spring is fixed to the inner wall of the movable groove 13, and the other end is fixed to the outer wall of the L-shaped rod 14, so that the second elastic element can slide along the movable groove 13 via the L-shaped rod 14. The elastic element 15 forces the L-shaped rod 14 into the movable groove 13; two second elastic elements 15 are provided in the movable groove 13 to force the two L-shaped rods 14 into the movable groove 13 respectively; the through groove 19 communicates with the movable groove 13; the driving element 17 is a plate-shaped structure; a sliding rod 21 is constructed on the slider 3; the sliding rod 21 is inserted into the driving plate, so that the driving element 17 can slide along the width direction of the connecting part 8 (when the movable section 5 is in the second state) and be connected to the slider 3 (a linear driving structure such as a lead screw can be provided on the slider 3 to drive the driving element 17 along the sliding part 8). The rod 21 slides (the linear drive structure is not shown and will not be described here). When the movable section 5 is in the second state, the drive member 17 slides along the slide rod 21 and can be inserted into the through groove 19 and the movable groove 13. The drive member 17 is constructed with two wedge-shaped surfaces 18. When the drive member 17 is inserted into the through groove 19, the two wedge-shaped parts 16 are respectively on the moving stroke of the two wedge-shaped surfaces 18, so that the two L-shaped rods 14 are forced to move away from each other along the movable groove 13 through the two wedge-shaped surfaces 18 and the two wedge-shaped parts 16, thereby driving the two separating parts 10 to move away from each other (e.g., Figure 11 (as shown); conversely, after the driving member 17 moves out of the through slot 19, the two L-shaped rods 14 can be retracted into the movable slot 13 under the action of the two second elastic members 15, thereby driving the two separating parts 10 to move closer to each other (as shown). Figure 9 and Figure 10 (As shown).

[0044] With this configuration, when the movable section 5 is in the first state, the two second elastic members 15 can drive the two separating parts 10 to move closer to each other, thereby causing the two separating parts 10 to fit against the side of the lubricating part 9 away from the connecting part 8. This restricts the lubricating part 9 to the end near the connecting part 8 during its sliding stroke, minimizing damage to the lubrication mechanism 7 (and minimizing lubricant leakage from the lubrication mechanism 7). Simultaneously, the two separating parts 10 can support the slide rail 4. After the slide rail 4 is inserted into the slide groove to force the movable section 5 to switch to the second state, the driving member 17 corresponds to the through groove 19. When the driving member 17 is inserted into the through groove 19, it can... The two wedge-shaped surfaces 18 abut against the two wedge-shaped parts 16 respectively, forcing the two L-shaped rods 14 away from each other, thereby driving the two separating parts 10 away from each other until the distance between the two separating parts 10 is the same as the width of the lubrication part 9. Under the action of the first elastic member 12, the lubrication part 9 moves to the end away from the connecting part 8 in its sliding stroke, so that the lubrication part 9 and the two separating parts 10 abut against the outer wall of the slide rail 4. This improves the stability between the slider 3 and the slide rail 4 (that is, improves the rigidity between the spindle box 2 and the saddle 1) while reducing the friction between the slide rail 4 and the moving section 5 by using the lubrication mechanism 7 on the lubrication part 9.

[0045] Furthermore, the through groove 19 penetrates the connecting portion 8. After the driving member 17 forces the L-shaped rod 14 to extend out of the movable groove 13 to misalign the two separating portions 10 with the lubrication portion 9, the side wall of the driving member 17 abuts against the wedge-shaped portion 16 and the end abuts against the lubrication portion 9, so that when the driving member 17 penetrates into the through groove 19, it can force the lubrication portion 9 away from the connecting portion 8. Specifically, in the above embodiment, the first elastic member 12 is used to force the lubricating part 9 away from the connecting part 8. In this embodiment, the first elastic member 12 is used to force the lubricating part 9 closer to the connecting part 8. The through groove 19 penetrates the connecting part 8 along the width direction of the connecting part 8, so that when the driving member 17 is inserted into the through groove 19, it can pass through the movable groove 13 and abut against the lubricating part 9. The two side walls on opposite sides of the driving member 17 are respectively connected to two wedge surfaces 18, that is, one wedge surface 18 extends to one side wall and the other wedge surface 18 extends to the other side wall. When the driving member 17 passes through the movable groove 13, the wedge part 16 first abuts against the corresponding wedge surface 18, and then the wedge part 16 and the wedge surface 18 abut against each other and relative to each other. The wedge 16 moves from the position of contacting the wedge surface 18 to the position of contacting the side wall of the drive member 17. At this time, the end of the drive member 17 contacts the lubricating part 9 (after the two separation parts 10 and the lubricating part 9 are misaligned, the lubricating part 9 remains in contact with the connecting part 8 under the action of the first elastic member 12). Then the drive member 17 continues to penetrate the through groove 19, which can force the lubricating part 9 away from the connecting part 8 while maintaining the position of the two separation parts 10 (during the process, the first elastic member 12 stores elastic potential energy), so that the lubricating part 9 and the two separation parts 10 are in contact with the outer wall of the slide rail 4. The advantage of this arrangement is that after the slide rail 4 is inserted into the slide groove, the movable section 5 rotates to the second state. At this time, the driving member 17 is inserted into the through groove 19, which can first force the two separating parts 10 to move away from each other, so that the two separating parts 10 are misaligned with the lubricating part 9. Then, the driving member 17 continues to be inserted into the through groove 19, which can force the lubricating part 9 to overcome the elastic force of the first elastic member 12 and move away from the connecting part 8, so that the lubricating part 9 is attached to the outer wall of the slide rail 4. In this way, the friction between the slide rail 4 and the movable section 5 is reduced by the lubrication mechanism 7 (at this time, the pressure between the two integral movable sections 5 and the two separating parts 10 and the outer wall of the slide rail 4 is small, and the friction is small, while the pressure between the lubricating part 9 and the outer wall of the slide rail 4 is large under the resistance of the driving member 17. However, the lubricating part 9 is provided with the lubrication mechanism 7, which can reduce the friction while improving the stability between the slide rail 4 and the slider 3).

[0046] In another embodiment of the present invention, the slider 3 is further provided with a connecting groove, a baffle 22 is slidably connected in the connecting groove, and a third elastic member 23 is provided in the connecting groove. One end of the third elastic member 23 is fixed to the inner wall of the connecting groove, and the other end is fixed to the baffle 22, so that the baffle 22 is forced out of the connecting groove and held in the sliding groove by the third elastic member 23; the driving member 17 is provided with a trigger part 24, the end of the trigger part 24 is constructed in a wedge shape, the baffle 22 extends to the moving stroke of the trigger part 24, and a slot 25 is constructed on the baffle 22. When the driving member 17 drives the two separating parts 10 to misalign with the lubrication part 9, the trigger part 24... 4. The wedge-shaped end of the trigger part 24 abuts against the baffle 22 and forces the baffle 22 into the connecting groove. When the driving member 17 abuts against the lubrication part 9 to force the lubrication part 9 to adhere to the outer wall of the slide rail 4, the trigger part 24 moves to the position corresponding to the slot 25, so that the baffle 22 can tend to move out of the connecting groove under the action of the third elastic member 23. At this time, there is a certain distance between the wedge-shaped end of the trigger part 24 and the slot 25, so that the baffle 22 can adhere to the outer wall of the slide rail 4 under the action of the third elastic member 23 (the part of the baffle 22 corresponding to the slide rail 4 is adapted to the shape of the outer wall of the slide rail 4). At the same time, the wedge-shaped end of the trigger part 24 is engaged by the slot 25. The advantage of this configuration is that when the end of the slide rail 4 is inserted into the slide groove, the movable section 5 switches to the second state. At this time, the baffle 22 extends into the slide groove under the action of the third elastic element 23 to prevent the slide rail 4 from continuing to be inserted into the slide groove. This avoids the slide rail 4 moving directly out of the slide groove under gravity when the slider 3 and the slide rail 4 are installed in a vertical state (such as when the slide rail 4 between the spindle box 2 and the saddle 1 is vertically set). Subsequently, the control drive element 17 can be inserted into the through groove 19 to drive the two separating parts 10 to separate from the lubrication part 9 and drive the lubrication part 9 to adhere to the outer wall of the slide rail 4. During the process, the trigger part 24 can also force the baffle 22 to retract into the connecting groove and move out of the slide groove (such as when the slide rail 4 is restricted by other structures). After the power unit of the spindle box 2 is installed, until the end of the trigger part 24 corresponds to the position of the slot 25, the baffle 22 tends to extend out of the connecting groove and abut against the outer wall of the slide rail 4 under the action of the third elastic member 23. Thus, the baffle 22 of the elastic member cleans the outer wall of the slide rail 4, and tries to prevent impurities adhering to the slide rail 4 from entering between the slider 3 and the slide rail 4. When the baffle 22 abuts against the outer wall of the slide rail 4, the slot 25 engages the wedge-shaped end of the trigger part 24. This restricts the position of the drive member 17, keeping the drive member 17 in the through groove 19. This restricts the relative position between the slider 3, the drive member 17, the connecting part 8, the lubrication part 9 and the separation part 10, so that the moving section 5 runs stably.

[0047] It should be noted that the slide rail 4 is detachably connected to the spindle box 2, and the slider 3 is detachably connected to the saddle 1. That is, in various embodiments of the present invention, the slider 3 and the slide rail 4 can be installed on the spindle box 2 first, and then the slider 3 can be installed on the saddle 1. Alternatively, the slider 3 and the slide rail 4 can be installed on the spindle box 2 and the saddle 1 respectively, and then the slide rail 4 and the slider 3 can be adapted and installed by hoisting.

[0048] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A three-rail headstock crane structure, comprising a saddle and a headstock, wherein a slider is fixed on the saddle and a slide rail is fixed on the headstock, characterized in that, The slider is provided with: The movable section is rotatably connected to the slider, and the movable section has a first state in which it is perpendicular to the slider to receive the slide rail and a second state in which it is in contact with the outer wall of the slide rail after receiving the slide rail. The movable section includes a connecting part that is rotatably connected to the slider and a lubricating part that is slidably connected to the connecting part. Two separating parts are also slidably connected to the connecting part. When the lubricating part is attached to the connecting part, the two separating parts approach each other and are attached to the side of the lubricating part away from the connecting part, so as to support the slide rail through the two separating parts; when the moving section is attached to the slide rail, the two separating parts are far apart from each other, and the lubricating part is far away from the connecting part, so as to attach the slide rail through the lubricating part and the two separating parts.

2. The three-rail spindle box overhead crane structure according to claim 1, characterized in that, A first elastic element is provided between the connecting part and the lubrication part.

3. The three-rail spindle box crane structure according to claim 2, characterized in that, The connecting part has a movable groove, and the separating part has an L-shaped rod fixed on it, with one end of the L-shaped rod slidably connected in the movable groove.

4. The three-rail spindle box crane structure according to claim 3, characterized in that, The movable groove is provided with a second elastic element for forcing the L-shaped rod to retract into the movable groove. The L-shaped rod has a wedge-shaped portion. A driving element is slidably connected to the slider. The driving element has a wedge-shaped surface. The connecting portion has a through groove communicating with the movable groove. When the movable section is in the second state, the driving element can be inserted into the through groove to force the L-shaped rod to extend out of the movable groove through the wedge-shaped portion and the wedge-shaped surface.

5. The three-rail spindle box overhead crane structure according to claim 4, characterized in that, The through groove passes through the connecting part. After the driving member forces the L-shaped rod to extend out of the movable groove so that the two separating parts and the lubrication part are misaligned, the side wall of the driving member abuts against the wedge-shaped part and the end abuts against the lubrication part, so that when the driving member goes deep into the through groove, it can force the lubrication part away from the connecting part.

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