A spindle box device for CNC machine tools

Abstract

The present invention discloses a spindle box device for a CNC machine tool, relating to the technical field of machining machine tools. The spindle box device comprises a spindle box mechanism, a box base, and a spindle lifting mechanism. The box base comprises a main base and lateral positioning bases. The lateral positioning bases are provided on both sides of the main base to form a lifting space between the main base and the lateral positioning bases on both sides. The spindle box mechanism comprises a spindle box body and a lateral adjustment seat driven by the spindle lifting mechanism. The lateral positioning base is provided with a positioning ram. The spindle box body is provided with lateral positioning surfaces on both sides to respectively correspond to the positioning rams of the lateral positioning bases on both sides. The spindle box body is mounted on the lateral adjustment seat. The spindle box body is pressed against the positioning ram on either side by the lateral adjustment seat to guide the up and down movement of the spindle box body. The present invention is simple to maintain and has a long maintenance cycle.

Description

Technical Field

[0001] The present invention relates to the technical field of machining machine tools, in particular to a spindle box device for numerically controlled machine tools. Background Art

[0002] In large-scale processing machine tools, the spindle box is generally large in size. In high-precision machining applications, the lifting drive of the spindle box generally requires directional guidance to avoid lateral deviation of the spindle box, which may affect the machining accuracy and damage the drive components.

[0003] Furthermore, due to routine machining operations, the headstock requires frequent lifting and lowering. Consequently, both the existing rail guide structure and the headstock wear out, causing the guide structure to separate from the headstock structure, resulting in a loss of directional lifting guidance. Consequently, maintenance requires not only disassembly of the rail guide structure but also repair of the worn portion of the headstock, resulting in a highly technical and time-consuming maintenance process. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a spindle box device for a numerically controlled machine tool, which is simple to maintain and has a long maintenance cycle.

[0005] In order to solve the above technical problems, the present invention provides a spindle box device for a CNC machine tool, comprising a spindle box mechanism, a box base for mounting the spindle box mechanism, and a spindle lifting mechanism for driving the spindle box mechanism to rise and fall;

[0006] Wherein, the box body base includes a main base and a lateral positioning base, and the lateral positioning bases are provided on both sides of the main base, so that a lifting space for the spindle box mechanism to move up and down is formed between the main base and the lateral positioning bases on both sides;

[0007] The spindle box mechanism includes a spindle box body and a lateral adjustment seat driven by the spindle lifting mechanism. The lateral positioning base is provided with a positioning slide. Lateral positioning surfaces are provided on both sides of the spindle box body to respectively correspond to the positioning slides of the lateral positioning bases on both sides. The spindle box body is installed on the lateral adjustment seat. The spindle box body is pressed toward the positioning slide on either side through the lateral adjustment seat to guide the up and down movement of the spindle box body.

[0008] As an improvement of the above scheme, the surface of the positioning slide is provided with a lubrication groove, the lateral positioning base is provided with an oil supply channel for receiving lubricating oil, the positioning slide is provided with an oil receiving channel connected to the lubrication groove, and the oil supply channel is connected to the lubrication groove through the oil receiving channel.

[0009] As an improvement of the above-mentioned scheme, the lubrication groove includes a horizontal lubrication groove and a connecting lubrication groove. Along the length direction of the positioning slide, a plurality of the horizontal lubrication grooves are spaced apart on the positioning slide, and adjacent horizontal lubrication grooves are connected through the connecting lubrication groove so that the lubricating oil can flow from top to bottom through the contact stroke range of the lateral positioning surface on the positioning slide.

[0010] As an improvement to the above solution, the connecting lubrication groove is arranged obliquely;

[0011] Between adjacent horizontal lubrication grooves, the upper end of the connecting lubrication groove is connected to the right end of the upper horizontal lubrication groove, and the lower end of the connecting lubrication groove is connected to the left end of the lower horizontal lubrication groove.

[0012] As an improvement to the above solution, the lateral adjustment seat includes a movable seat connected to the spindle housing and a lifting seat driven by the spindle lifting mechanism, the lifting seat is provided with a plurality of horizontally arranged transverse slide rails, and the transverse slide rails are longitudinally spaced apart and distributed on the lifting seat;

[0013] The movable seat is provided with a transverse sliding groove which is adapted to the transverse sliding rail so as to be slidably connected to the lifting seat.

[0014] As an improvement of the above solution, the lateral adjustment seat further includes a pressing locking member, which includes a locking shaft and an eccentric wheel for laterally pressing the transverse slide rail;

[0015] The top surface of the movable seat is provided with two adjustment through holes, and the transverse slide rail is located between the two adjustment through holes;

[0016] Each of the transverse sliding grooves is connected to the adjusting through hole, so that after the locking shaft is inserted into the adjusting through hole, the locking shaft is rotated to make the eccentric wheel come into contact with one side end face of the transverse sliding rail, so that the lateral positioning surface on one side is pressed toward the positioning slide on the corresponding side.

[0017] As an improvement of the above-mentioned solution, the locking shaft is provided with a positioning ring for limiting the depth of the locking shaft inserted into the adjusting hole. The diameter of the positioning ring is larger than the adjusting hole, so that when the locking shaft is inserted until the positioning ring conflicts with the top surface of the movable seat, the eccentric wheel corresponds to the transverse sliding groove.

[0018] As an improvement to the above solution, the locking shaft is provided with a locking gear, and the top surface of the movable seat is provided with a self-locking worm engaged with the locking gear, so that the locking shaft is driven to rotate by rotating the self-locking worm.

[0019] As an improvement to the above solution, the oil receiving channel is connected to the upper end of the lubrication groove, and the lower end of the lubrication groove is connected to an oil suction channel, and the oil suction channel is provided with a sponge for absorbing oil.

[0020] As an improvement to the above solution, the oil suction channel is arranged at an angle, the upper end of the oil suction channel is connected to the lubrication groove, and the lower end of the oil suction channel is connected to the oil collecting container;

[0021] The oil in the oil collecting container is pumped back to the oil delivery channel by an oil pump.

[0022] The implementation of the present invention has the following beneficial effects:

[0023] The present invention discloses a spindle box device for a numerically controlled machine tool, comprising a spindle box mechanism, a box body base, and a mechanism for driving a spindle to lift. The box body base includes a main base and a lateral positioning base. The lateral positioning bases are provided on both sides of the main base, so that a lifting space for the spindle box mechanism to move up and down is formed between the main base and the lateral positioning bases on both sides. Therefore, the lateral positioning bases on both sides can be used to guide the spindle box to be lifted and lowered.

[0024] Moreover, the spindle box mechanism includes a spindle box body and a lateral adjustment seat driven by the spindle lifting mechanism. The lateral positioning base is provided with a positioning slide. Lateral positioning surfaces are provided on both sides of the spindle box body to respectively correspond to the positioning slides of the lateral positioning bases on both sides. The setting of the positioning slide can greatly reduce the wear of the spindle box body, and during maintenance, only the positioning slide that is excessively worn needs to be replaced.

[0025] At the same time, the spindle box is installed on the lateral adjustment seat, and the spindle box is pressed toward the positioning slide on either side through the lateral adjustment seat to guide the up and down movement of the spindle box. With such an arrangement, the maintenance of the lateral positioning of the spindle box can be accelerated by alternately pressing the positioning slide on one side. At the same time, there can also be enough time to repair the replaced positioning slide to reduce maintenance costs without affecting production use. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the three-dimensional structure of the spindle box device of the present invention;

[0027] Figure 2 It is a schematic diagram of the structural decomposition of the spindle box device of the present invention;

[0028] Figure 3 It is a schematic cross-sectional view of the lateral positioning base of the present invention;

[0029] Figure 4 It is a structural schematic diagram of the positioning ram of the present invention;

[0030] Figure 5 It is a schematic cross-sectional view of the lateral adjustment seat of the present invention;

[0031] Figure 6 It is a schematic diagram of the top structure of the lateral adjustment seat of the present invention. DETAILED DESCRIPTION

[0032] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention will be described in further detail below with reference to the accompanying drawings.

[0033] See also Figure 1 、 2 and 3. The present invention provides a spindle box device for a CNC machine tool, comprising a spindle box mechanism, a box base for mounting the spindle box mechanism, and a spindle lifting mechanism 1 for driving the spindle box mechanism to rise and fall;

[0034] The box body base includes a main base 2 and a lateral positioning base 3. The lateral positioning bases 3 are provided on both sides of the main base 2, so that a lifting space a for the spindle box mechanism to move up and down is formed between the main base 2 and the lateral positioning bases 3 on both sides;

[0035] The spindle box mechanism includes a spindle box body 5 and a lateral adjustment seat 6 driven by the spindle lifting mechanism 1. The lateral positioning base 3 is provided with a positioning ram 7. The spindle box body 5 is provided with lateral positioning surfaces 51 on both sides to correspond to the positioning rams 7 of the lateral positioning base 3 on both sides. The spindle box body 5 is mounted on the lateral adjustment seat 6. The spindle box body 5 is pressed against the positioning ram 7 on either side by the lateral adjustment seat 6 to guide the vertical movement of the spindle box body 5. Preferably, the positioning ram 7 is made of a low-friction and wear-resistant material such as Teflon.

[0036] Specifically, see Figure 3 and Figure 4 The surface of the positioning ram 7 is provided with a lubrication groove 71. The lateral positioning base 3 is provided with an oil delivery channel 31 for receiving lubricating oil. The positioning ram 7 is provided with an oil receiving channel 72 connected to the lubrication groove 71. The oil delivery channel 31 is connected to the lubrication groove 71 through the oil receiving channel 72. The provision of the lubrication groove 71 can further reduce wear on the spindle housing 5 and the positioning ram 7, while also further reducing the operating resistance of the spindle housing 5.

[0037] For details, see Figure 4The lubrication groove 71 includes a horizontal lubrication groove 711 and a connecting lubrication groove 712. Along the length direction of the positioning slide 7, the positioning slide 7 is provided with a plurality of the horizontal lubrication grooves 711 at intervals. The adjacent horizontal lubrication grooves 711 are connected by the connecting lubrication groove 712, so that the lubricating oil can flow from top to bottom through the contact stroke range of the lateral positioning surface 51 on the positioning slide 7, thereby ensuring that the contact between the spindle box 5 and the positioning slide 7 during the lifting process can be lubricated by the lubrication groove 71.

[0038] To provide more comprehensive lubrication of the spindle housing 5 and improve the overall fluidity of the lubricating oil in the lubrication grooves 71, the connecting lubrication grooves 712 are arranged at an angle. Between adjacent horizontal lubrication grooves 711, the upper end of the connecting lubrication groove 712 connects to the right end of the upper horizontal lubrication groove 711, and the lower end of the connecting lubrication groove 712 connects to the left end of the lower horizontal lubrication groove 711. Similarly, between adjacent horizontal lubrication grooves 711, the upper end of the connecting lubrication groove 712 connects to the left end of the upper horizontal lubrication groove 711, and the lower end of the connecting lubrication groove 712 connects to the right end of the lower horizontal lubrication groove 711.

[0039] In order to allow the lubricating oil to flow through the entire lubrication groove 71 by gravity, the oil receiving channel 72 is connected to the upper end of the lubrication groove 71. The upper end of the lubrication groove 71 is the highest point of the lubrication groove 71. Therefore, when the lubricating oil flows into the upper end of the lubrication groove 71, it can use gravity to spread and flow completely through the entire lubrication groove 71.

[0040] Furthermore, in order to prevent the lubricating oil from overflowing the lubricating groove 71 and to further improve the lubricating effect of the lubricating groove 71 , the lower end of the lubricating groove 71 is connected to an oil suction channel 73 , and the oil suction channel 73 is provided with a sponge 74 for absorbing oil.

[0041] Under the action of the sponge 74, the fluidity of the lubricating oil can be maintained to a certain extent. On the other hand, the setting of the sponge 74 has the effect of slowly sucking the lubricating oil to avoid the lubricating oil from flowing too quickly.

[0042] Moreover, the oil suction channel 73 is arranged at an angle, the high end of the oil suction channel 73 is connected to the lubrication groove 71, and the low end of the oil suction channel 73 is connected to the oil collecting container 8. Therefore, the inclined setting of the oil suction channel 73 helps to guide the lubricating oil to the oil collecting container 8.

[0043] The lateral positioning base 3 is equipped with an oil reservoir 9 for releasing lubricating oil. This reservoir 9 is connected to the oil delivery channel 31 to release lubricating oil to the lubrication groove 71. Preferably, the lubricating oil in the oil collection container 8 can be pumped back to the oil reservoir 9 via an oil pump 81 to circulate oil to the oil delivery channel 31. Furthermore, the sponge 74 provides a filtering function to extend the service life of the lubricating oil. The oil collection container 8 and the oil pump 81 are connected by an oil pipe (not shown).

[0044] See also Figure 5 and Figure 6 The lateral adjustment seat 6 includes a movable seat 61 connected to the spindle housing 5 and a lifting seat 62 driven by the spindle lifting mechanism 1. The lifting seat 62 is provided with a plurality of horizontally arranged transverse slide rails 621, and the transverse slide rails 621 are longitudinally spaced and distributed on the lifting seat 62; the movable seat 61 is provided with a transverse slide groove 611 corresponding to the transverse slide rail 621 to be slidably connected to the lifting seat 62. Therefore, maintenance personnel can translate the movable seat 61 so that the spindle housing 5 contacts the unworn positioning slide 7 on the other side. Preferably, the spindle lifting mechanism 1 is a screw transmission mechanism, which generally includes a screw driven by a servo motor and a nut seat threadedly connected to the screw, and the nut seat is connected to the lifting seat 62. Preferably, the positioning slide 7 can be connected to the lateral positioning base 3 by screw connection to facilitate the replacement and maintenance of the positioning slide 7.

[0045] In order to facilitate the regulation of the contact pressure between the spindle housing 5 and the positioning ram 7, the lateral adjustment seat 6 further includes a pressing locking member, which includes a locking shaft 63 and an eccentric wheel 64 for laterally pressing the transverse slide rail 621;

[0046] The top surface of the movable seat 61 is provided with two adjustment holes 612, and the transverse slide rail 621 is located between the two adjustment holes 612. Each transverse slide groove 611 is connected to the adjustment hole 612. After the locking shaft 63 is inserted into the adjustment hole 612, the locking shaft 63 is rotated to cause the eccentric wheel 64 to contact one end surface of the transverse slide rail 621, so that the lateral positioning surface 51 on one side is pressed against the positioning ram 7 on the corresponding side. Therefore, the contact pressure between the spindle housing 5 and the positioning ram 7 can be controlled by driving and rotating the locking shaft 63.

[0047] Moreover, the locking shaft 63 is provided with a positioning ring 65 for limiting the depth of the locking shaft 63 inserted into the adjusting hole 612. The diameter of the positioning ring 65 is larger than the adjusting hole 612, so that when the locking shaft 63 is inserted until the positioning ring 65 conflicts with the top surface of the movable seat 61, the eccentric wheel 64 corresponds to the transverse slide groove 611, thereby facilitating the maintenance personnel's convenient assembly operation.

[0048] The locking shaft 63 is equipped with a locking gear 66. A self-locking worm 67 is mounted on the top surface of the movable seat 61 and meshes with the locking gear 66. Rotation of the self-locking worm 67 drives the locking shaft 63. This arrangement prevents excessive wear of the positioning ram 7 and excessive displacement of the spindle housing 5. Accordingly, the movable seat 61 is equipped with a shaft seat for mounting the self-locking worm.

[0049] Preferably, the outer contour of the eccentric wheel 64 is provided with a contact layer with a slight deformation property, and the contact layer can be made of a material with a small elastic deformation, such as hard plastic or polyurethane.

[0050] Preferably, the two adjustment holes 612 are both equipped with the pressing locking parts. After pressing and fixing one of the pressing locking parts, the self-locking worm 67 of the pressing locking part on the other side is screwed to make the meshing between the self-locking worm 67 and the locking gear 66 in a mutually tightened state to eliminate the influence of the virtual position.

[0051] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A spindle box device for a CNC machine tool, characterized in that: It includes a spindle box mechanism, a box base for installing the spindle box mechanism, and a spindle lifting mechanism for driving the spindle box mechanism to rise and fall; Wherein, the box body base includes a main base and a lateral positioning base, and the lateral positioning bases are provided on both sides of the main base, so that a lifting space for the spindle box mechanism to move up and down is formed between the main base and the lateral positioning bases on both sides; The spindle box mechanism includes a spindle box body and a lateral adjustment seat driven by the spindle lifting mechanism, the lateral positioning base is provided with a positioning slide, and lateral positioning surfaces are provided on both sides of the spindle box body to respectively correspond to the positioning slides of the lateral positioning bases on both sides. The spindle box body is mounted on the lateral adjustment seat, and the spindle box body is pressed toward the positioning slide on either side through the lateral adjustment seat to guide the spindle box body to move up and down; The surface of the positioning ram is provided with a lubrication groove, the lateral positioning base is provided with an oil delivery channel for accessing the lubricating oil, the positioning ram is provided with an oil receiving channel communicating with the lubrication groove, and the oil delivery channel is communicated with the lubrication groove through the oil receiving channel; The lateral adjustment seat includes a movable seat connected to the spindle housing and a lifting seat driven by the spindle lifting mechanism, the lifting seat is provided with a plurality of horizontally arranged transverse slide rails, and the transverse slide rails are longitudinally spaced apart and distributed on the lifting seat; The movable seat is provided with a transverse slide relative to the horizontal slide rail adapted to slideably connected to the lifting seat; The lateral adjustment seat further includes a pressing locking member, which includes a locking shaft and an eccentric wheel for laterally pressing the transverse slide rail; The top surface of the movable seat is provided with two adjustment through holes, and the transverse slide rail is located between the two adjustment through holes; Each of the transverse slide grooves is connected to the adjustment through-hole, so that after the locking shaft is inserted into the adjustment through-hole, by rotating the locking shaft, the eccentric wheel is in contact with one end surface of the transverse slide rail, so that the lateral positioning surface on one side is pressed against the positioning ram on the corresponding side; The locking shaft is provided with a positioning ring for limiting the depth of the locking shaft inserted into the adjustment hole, the diameter of the positioning ring being larger than the adjustment hole, so that when the locking shaft is inserted until the positioning ring contacts the top surface of the movable seat, the eccentric wheel corresponds to the transverse slide groove; The locking shaft is provided with a locking gear, and the top surface of the movable seat is provided with a self-locking worm engaged with the locking gear, so that the locking shaft is driven to rotate by rotating the self-locking worm.

2. The spindle box device for a CNC machine tool according to claim 1, characterized in that: The lubrication groove includes a horizontal lubrication groove and a connecting lubrication groove. Along the length direction of the positioning slide, the positioning slide is provided with a plurality of horizontal lubrication grooves at intervals. Adjacent horizontal lubrication grooves are connected by the connecting lubrication groove so that the lubricating oil flows from top to bottom through the contact stroke range of the lateral positioning surface on the positioning slide.

3. The spindle box device for a CNC machine tool according to claim 2, characterized in that: The connecting lubrication groove is arranged obliquely; Between adjacent horizontal lubrication grooves, the upper end of the connecting lubrication groove is connected to the right end of the upper horizontal lubrication groove, and the lower end of the connecting lubrication groove is connected to the left end of the lower horizontal lubrication groove.

4. The spindle box device for a CNC machine tool according to claim 2, characterized in that: The oil receiving channel is communicated with the upper end of the lubricating groove, and the lower end of the lubricating groove is communicated with an oil suction channel, and the oil suction channel is provided with a sponge for absorbing oil.

5. The spindle box device for a CNC machine tool according to claim 4, characterized in that: The oil suction channel is arranged at an angle, the upper end of the oil suction channel is connected to the lubrication groove, and the lower end of the oil suction channel is connected to the oil collecting container; The lubricating oil in the oil collecting container is pumped back to the oil delivery channel by an oil pump.

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