Lead screw module for six-axis machining center

Abstract

The utility model belongs to the technical field of lead screw modules, and discloses a lead screw module for a six-axis machining center. Comprising a first annular track, a second annular track, a first lead screw, a second lead screw, a third annular track, a fourth annular track, a fifth annular track and a sixth annular track, the second lead screw is fixed in the second annular track and is parallel to the length direction of the second annular track, the sliding seat is connected to the inner wall of the first annular track in a sliding mode and is in sliding fit with the inner wall of the second annular track, and a first threaded sleeve and a second threaded sleeve which are rotationally connected with the sliding seat are arranged on the sliding seat in a penetrating mode; the first lead screw penetrates through the first threaded sleeve and is in threaded connection with the first threaded sleeve, the second lead screw penetrates through the second threaded sleeve and is in threaded connection with the second threaded sleeve, and a rotating mechanism used for driving the first threaded sleeve or the second threaded sleeve to rotate is arranged on the sliding seat. According to the device, by arranging the rotating mechanism, movement in two directions can be achieved, and the use cost and the later maintenance cost of the device are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a lead screw module technical field, especially a lead screw module for six-axis machining center. BACKGROUND

[0002] The numerical control machining center is composed of mechanical equipment and numerical control system to be suitable for machining complicated parts, when machining the parts, the shaft on the machining center is driven to move through the lead screw module, the machining mechanism installed on the machining center is controlled to move to complete the machining of the parts.

[0003] In the Chinese utility model patent with publication number CN215748003U, a kind of lead screw module for machining center is disclosed, which is convenient to install, including first X direction lead screw structure, second X direction lead screw structure, Y direction lead screw structure, Z direction lead screw structure, first positioning structure, second positioning structure, third positioning structure, the first X direction lead screw structure, second X direction lead screw structure are arranged side by side, the Y direction lead screw structure is respectively arranged on the first X direction lead screw structure, second X direction lead screw structure by first positioning structure, second positioning structure, the Z direction lead screw structure is arranged on Y direction lead screw structure by third positioning structure.

[0004] For the above-mentioned related technology, the inventors believe that the following defects exist: the lead screw module used by the existing machining center mostly adopts motor-driven lead screw to make the slide on the track move with the machining mechanism to the required machining position for machining operation, and the six-axis machining center will use multiple lead screw modules, as in the above technology, in order to realize the movement of three-direction shafts, three groups of motors are needed, and the cost of motor is high, which increases the use cost and maintenance cost of equipment. UTILITY MODEL CONTENT

[0005] In order to solve the above problems, the utility model provides a lead screw module for six-axis machining center.

[0006] The technical purposes are achieved by the following technical scheme: a lead screw module for a six-axis machining center, comprising a first annular track, a second annular track arranged on the top of the first annular track and perpendicular to the first annular track, a first lead screw fixed to the inner wall of the first annular track and parallel to the length direction of the first annular track, a second lead screw fixed to the inner wall of the second annular track and parallel to the length direction of the second annular track, and a sliding seat slidingly connected to the inner wall of the first annular track and the inner wall of the second annular track, wherein a first threaded sleeve and a second threaded sleeve rotatingly connected to the sliding seat are arranged on the sliding seat, the first lead screw penetrates the inside of the first threaded sleeve and is threadedly connected, the second lead screw penetrates the inside of the second threaded sleeve and is threadedly connected, a rotating mechanism for driving the first threaded sleeve or the second threaded sleeve to rotate is arranged on the sliding seat, the axis of the first threaded sleeve coincides with the axis of the first lead screw, and the axis of the second threaded sleeve coincides with the axis of the second lead screw.

[0007] By adopting the above technical scheme, when in use, the staff drives the first threaded sleeve to rotate through the rotating mechanism, the first threaded sleeve is arranged on the sliding seat, the first lead screw penetrates the inside of the first threaded sleeve and is threadedly connected, the sliding seat is slidingly connected to the first annular track and the second annular track, so that the sliding seat drives the second annular track to move along the length direction of the first annular track, thereby adjusting the position of the second annular track relative to the length direction of the first annular track. The second threaded sleeve is arranged on the sliding seat, the second lead screw penetrates the inside of the second threaded sleeve and is threadedly connected, the sliding seat is slidingly connected to the second annular track, so that the second annular track and the second lead screw slide horizontally along the width direction of the first annular track, thereby adjusting the position of the second annular track relative to the width direction of the first annular track. By arranging a group of rotating mechanisms, the movement in two directions can be realized, and the use cost and the later maintenance cost of the equipment are reduced.

[0008] Further, the sliding seat is internally provided with a cavity, the rotating mechanism comprises a transmission assembly, the transmission assembly comprises a first friction wheel fixedly sleeved on the first threaded sleeve, a transmission rod movably arranged in the cavity and parallel to the first threaded sleeve, a second friction wheel and a third friction wheel fixedly sleeved on the transmission rod and mutually mirror-imaged, a worm rotatingly installed on the top of the cavity and perpendicular to the transmission rod, a fourth friction wheel fixedly sleeved on the lower end of the worm and matched with the third friction wheel, and a worm wheel fixedly sleeved on the second threaded sleeve and meshed with the worm, the first friction wheel and the second friction wheel are matched, and the rotating mechanism further comprises a driving assembly for driving the transmission rod to rotate and a moving assembly for driving the transmission rod to move so that the second friction wheel is tightly abutted against the first friction wheel or the third friction wheel is tightly abutted against the fourth friction wheel.

[0009] By adopting the technical scheme, when the position of the second annular track relative to the length direction of the first annular track is adjusted, the worker needs to drive the second friction wheel to abut against the first friction wheel through the moving assembly, and control the driving assembly to drive the transmission rod to rotate, so that the second friction wheel fixed with the transmission rod, the first friction wheel abutting against the second friction wheel, and the first threaded sleeve fixed with the first friction wheel are all rotated.

[0010] Further, the moving assembly comprises an electric push rod fixed on the inner wall of the cavity and parallel to the transmission rod, and a connecting plate fixed on the push rod end of the electric push rod and rotationally connected with the transmission rod.

[0011] By adopting the technical scheme, the worker controls the push rod end of the electric push rod to retract until the push rod end of the electric push rod retracts to the shortest position, in the process, the connecting plate fixed with the push rod end of the electric push rod, the transmission rod connected with the connecting plate, the second friction wheel and the third friction wheel fixed with the transmission rod move towards the direction close to the fourth friction wheel, which can make the third friction wheel and the fourth friction wheel abut against each other, at this time, the transmission rod is driven to rotate through the driving assembly, so as to achieve the purpose of controlling the rotation of the second threaded sleeve. The worker controls the push rod end of the electric push rod to extend until the push rod end of the electric push rod extends to the longest position, which can make the second friction wheel and the first friction wheel abut against each other, at this time, the transmission rod is driven to rotate through the driving assembly, so as to achieve the purpose of controlling the rotation of the first threaded sleeve.

[0012] Further, the driving assembly comprises a transmission sleeve rotationally installed on the inner wall of the cavity and in sliding fit with the transmission rod, and a driving motor fixed on the sliding seat and driving the transmission sleeve to rotate, a first through groove is formed in the position close to the driving motor on the top of the first annular track, the driving motor is located in the first through groove, a sliding block is fixed on the side wall of the transmission rod, and a sliding groove in sliding fit with the sliding block is formed through the side wall of the transmission sleeve.

[0013] By adopting the technical scheme, the driving motor drives the transmission sleeve to rotate after working, and under the limiting cooperation of the sliding block and the sliding groove, it is ensured that the transmission rod rotates synchronously with the transmission sleeve.

[0014] Further, the sliding block top and the sliding block bottom are movably installed with a plurality of rolling columns in rolling connection with the inner wall of the sliding groove.

[0015] By adopting the technical scheme, the sliding block moves along the inside of the sliding groove in the movement process of the transmission rod, and the roller reduces the friction of the sliding block in the movement along the inside of the sliding groove.

[0016] Further, the thickness of the third friction wheel is greater than the thickness of the fourth friction wheel.

[0017] Further, a second through groove is formed in the top of the second annular track, a maintenance door that is magnetically attracted to the sliding seat is arranged on the position of the sliding seat side wall close to the second through groove, and an auxiliary recess for facilitating the opening and closing of the maintenance door is formed in the position of the maintenance door side wall close to the second through groove.

[0018] By adopting the technical scheme, the setting of the maintenance door facilitates the subsequent maintenance of the internal components of the sliding seat.

[0019] To sum up, the utility model has the following beneficial effects: in the application, when in use, the staff drives the first threaded sleeve to rotate through the rotating mechanism, because the first threaded sleeve is arranged through the sliding seat, the first lead screw is arranged through the inside of the first threaded sleeve and is connected in threads, the sliding seat is connected in sliding with the first annular track and the second annular track, so that the sliding seat drives the second annular track to move along the length direction of the first annular track, thereby adjusting the position of the second annular track relative to the length direction of the first annular track. The second threaded sleeve is driven to rotate through the rotating mechanism, because the second lead screw is arranged through the inside of the second threaded sleeve and is connected in threads, the second threaded sleeve is arranged through the sliding seat, and the sliding seat is connected in sliding with the second annular track, so that the second annular track and the second lead screw slide horizontally along the length direction of the second annular track, thereby adjusting the position of the second annular track relative to the width direction of the first annular track. By arranging a set of rotating mechanisms, the movement in two directions can be realized, and the use cost and the later maintenance cost of the equipment are reduced. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the overall structure schematic diagram of the utility model embodiment;

[0021] Figure 2 It is Figure 1 It is the structure schematic diagram of another view;

[0022] Figure 3 The utility model embodiment is used for highlighting the structure schematic diagram of the transmission assembly;

[0023] Figure 4 It is Figure 3 The front view of

[0024] Figure 5 It is Figure 1 The enlarged schematic diagram of A in

[0025] Figure 6 It isFigure 4 Enlarged view at B.

[0026] In the figure: 1, first circular track; 2, second circular track; 3, first lead screw; 4, second lead screw; 5, sliding seat; 6, first threaded sleeve; 7, second threaded sleeve; 8, rotating mechanism; 81, transmission assembly; 811, first friction wheel; 812, transmission rod; 813, second friction wheel; 814, third friction wheel; 815, worm; 816, fourth friction wheel; 817, worm gear; 82, moving assembly; 821, electric push rod; 822, connecting plate; 83, driving assembly; 831, transmission sleeve; 832, driving motor; 9, first through slot; 10, sliding block; 11, sliding groove; 12, roller; 13, second through slot; 14, access door; 15, auxiliary groove. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application; obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application, and all other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor fall within the protection scope of the present application.

[0028] As Figures 1-6 shown, the present application discloses a six-axis machining center lead screw module, which comprises a first circular track 1, a first circular track 1, a sliding seat 5 and a rotating mechanism 8. The second circular track 2 is arranged on the top of the first circular track 1, and the length direction of the second circular track 2 is perpendicular to the length direction of the first circular track 1. The inner wall of the first circular track 1 is fixed with a first lead screw 3, and the axial direction of the first lead screw 3 is parallel to the length direction of the first circular track 1. The inner wall of the second circular track 2 is fixed with a second lead screw 4, and the axial direction of the second lead screw 4 is parallel to the length direction of the second circular track 2. The sliding seat 5 is internally provided with a cavity, and the sliding seat 5 is slidingly connected with the inner wall of the first circular track 1 and the inner wall of the second circular track 2, and a first threaded sleeve 6 and a second threaded sleeve 7 which are rotationally connected with the sliding seat 5 are arranged through the sliding seat 5. The axis of the first threaded sleeve 6 coincides with the axis of the first lead screw 3, and the first lead screw 3 penetrates the inside of the first threaded sleeve 6 and is threadedly connected. The axis of the second threaded sleeve 7 coincides with the axis of the second lead screw 4, and the second lead screw 4 penetrates the inside of the second threaded sleeve 7 and is threadedly connected. In the present embodiment, in order to achieve the purpose of six-axis machining, a group of vertically arranged linear modules can be installed on the second circular track 2, a three-degree-of-freedom rotary table (such as a WMD3-SF type high-precision three-axis electric rotary table) is installed on the linear module, and corresponding machining mechanisms are arranged on the three-degree-of-freedom rotary table (the linear module, the three-degree-of-freedom rotary table and the machining mechanisms are not shown in the figure).

[0029] The rotating mechanism 8 is arranged on the sliding base 5 and used for driving the rotation of the first threaded sleeve 6 or the second threaded sleeve 7. The rotating mechanism 8 comprises a transmission assembly 81, a driving assembly 83 and a moving assembly 82. The transmission assembly 81 comprises a first friction wheel 811, a transmission rod 812, a second friction wheel 813, a third friction wheel 814, a worm 815, a fourth friction wheel 816 and a worm wheel 817. The first friction wheel 811 is fixedly sleeved on the first threaded sleeve 6, and the transmission rod 812 is movably arranged in the cavity and parallel to the first threaded sleeve 6. The second friction wheel 813 and the third friction wheel 814 are both fixedly sleeved on the transmission rod 812 and mirror images of each other, and the first friction wheel 811 cooperates with the second friction wheel 813. The worm 815 is rotatably installed at the top of the cavity, and the worm 815 is perpendicular to the transmission rod 812. The fourth friction wheel 816 is fixedly sleeved on the lower end of the worm 815 and cooperates with the third friction wheel 814, and the thickness of the third friction wheel 814 is greater than that of the fourth friction wheel 816. The worm wheel 817 is fixedly sleeved on the second threaded sleeve 7, and the worm wheel 817 is engaged with the worm 815.

[0030] The driving assembly 83 is used for driving the rotation of the transmission rod 812, and the driving assembly 83 comprises a transmission sleeve 831 and a driving motor 832. The transmission sleeve 831 is rotatably installed on the inner wall of the cavity, and the inner wall of the transmission sleeve 831 is in sliding fit with the outer wall of the transmission rod 812. Specifically, a sliding block 10 is fixed on the side wall of the transmission rod 812, and a sliding groove 11 in sliding fit with the sliding block 10 is formed through the side wall of the transmission sleeve 831. The driving motor 832 is fixed on the sliding base 5, the output end of the driving motor 832 penetrates the side wall of the sliding base 5 and is rotatably connected, and the output end of the driving motor 832 is fixed with one end of the transmission sleeve 831. A first through groove 9 is formed in the top of the first annular track 1 close to the driving motor 832, and the driving motor 832 is located in the first through groove 9.

[0031] The moving assembly 82 is used for driving the movement of the transmission rod 812 so that the second friction wheel 813 is tightly abutted against the first friction wheel 811 or the third friction wheel 814 is tightly abutbed against the fourth friction wheel 816. The moving assembly 82 comprises an electric push rod 821 and a connecting plate 822. The electric push rod 821 is fixed on the inner wall of the cavity and parallel to the transmission rod 812. The connecting plate 822 is fixed on the push rod end of the electric push rod 821, and the transmission rod 812 penetrates the connecting plate 822 and is rotatably connected.

[0032] In use, the staff controls the extension of the push rod end of the electric push rod 821 until the push rod end of the electric push rod 821 is extended to the longest position, so that the connecting plate 822 fixed with the push rod end of the electric push rod 821, the transmission rod 812 connected with the connecting plate 822, the second friction wheel 813 and the third friction wheel 814 fixed with the transmission rod 812 move towards the direction close to the first friction wheel 811, so that the second friction wheel 813 and the first friction wheel 811 are tightly contacted, at this time, the driving motor 832 drives the transmission sleeve 831 to rotate, under the cooperation of the sliding block 10 and the sliding groove 11, the transmission rod 812 rotates synchronously with the transmission sleeve 831, under the cooperation of the second friction wheel 813 and the first friction wheel, the first threaded sleeve 6 starts to rotate, since the first threaded sleeve 6 is arranged through the sliding seat 5, the first lead screw 3 is threaded connected through the inside of the first threaded sleeve 6, and the sliding seat 5 is slidingly connected with the first annular track 1 and the second annular track 2, so that the sliding seat 5 drives the second annular track 2 to move along the length direction of the first annular track 1, thereby adjusting the position of the second annular track 2 relative to the length direction of the first annular track 1. In the process of controlling the contraction of the push rod end of the electric push rod 821, the connecting plate 822 fixed with the push rod end of the electric push rod 821, the transmission rod 812 connected with the connecting plate 822, the second friction wheel 813 and the third friction wheel 814 fixed with the transmission rod 812 move towards the direction close to the fourth friction wheel 816, until the push rod end of the electric push rod 821 is contracted to the shortest position, the third friction wheel 814 and the fourth friction wheel 816 are tightly contacted, at this time, the driving motor 832 drives the transmission sleeve 831 and the transmission rod 812 to rotate, so that the third friction wheel 814 fixed with the transmission rod 812, the fourth friction wheel 816 tightly contacted with the third friction wheel 814, the worm 815 fixed with the fourth friction wheel 816, the worm wheel 817 meshed with the worm 815 and the second threaded sleeve 7 fixed with the worm wheel 817 are all rotated, since the second lead screw 4 is threaded connected through the inside of the second threaded sleeve 7, the second threaded sleeve 7 is arranged through the sliding seat 5, and the sliding seat 5 is slidingly connected with the second annular track 2, so that the second annular track 2 and the second lead screw 4 slide horizontally along the width direction of the first annular track 1, thereby adjusting the position of the second annular track 2 relative to the width direction of the first annular track 1. By arranging a set of rotating mechanism 8, the movement in two directions can be realized, the rotating mechanism 8 replaces one set of motor in the traditional technology with the worm 815, the worm wheel 817 and the transmission rod 812, firstly, the production cost of the worm 815, the worm wheel 817 and the transmission rod 812 is relatively low, secondly, the components and connection lines of the motor are numerous, the failure rate is relatively high in the use process, and the maintenance cost is relatively large, the number of motor setting groups is reduced in the application, and the use cost and maintenance cost are reduced.

[0033] The top and bottom of the sliding block 10 are movably provided with a plurality of rollers 12 which are in rolling connection with the inner wall of the sliding groove 11.

[0034] The top of the second annular track 2 is provided with a second through groove 13, and the side wall of the sliding base 5 is provided with a maintenance door 14 which is magnetically attracted to the sliding base 5 at a position close to the second through groove 13. The side wall of the maintenance door 14 is provided with an auxiliary groove 15 which facilitates the opening and closing of the maintenance door 14 at a position close to the second through groove 13. The provision of the maintenance door 14 facilitates the subsequent maintenance of the internal components of the sliding base 5.

[0035] The above is only the preferred embodiment of the present application, and the protection scope of the present application is not limited to the above-mentioned embodiments. Any technical solution falling within the concept of the present application shall fall within the protection scope of the present application. It should be noted that, for ordinary skilled persons in the art, some improvements and refinements without departing from the principles of the present application shall also be considered as falling within the protection scope of the present application.

Claims

1. A screw module for a six-axis machining center, comprising a first circular track (1), a second circular track (2) arranged on the top of the first circular track (1) and perpendicular to the first circular track (1), a first screw (3) fixed to the inner wall of the first circular track (1) and parallel to the length direction of the first circular track (1), a second screw (4) fixed to the inner wall of the second circular track (2) and parallel to the length direction of the second circular track (2), and a sliding seat (5) slidingly connected to the inner wall of the first circular track (1) and slidingly matched with the inner wall of the second circular track (2), characterized in that: The first threaded sleeve (6) and the second threaded sleeve (7) are arranged through the slide base (5) and are rotatably connected with the slide base (5), the first lead screw (3) is arranged through the inside of the first threaded sleeve (6) and is threadedly connected, the second lead screw (4) is arranged through the inside of the second threaded sleeve (7) and is threadedly connected, the slide base (5) is provided with a rotating mechanism (8) for driving the first threaded sleeve (6) or the second threaded sleeve (7) to rotate, the axis of the first threaded sleeve (6) coincides with the axis of the first lead screw (3), and the axis of the second threaded sleeve (7) coincides with the axis of the second lead screw (4). ​ 2. The screw module for a six-axis machining center according to claim 1, characterized in that: The inside of the slide base (5) is provided with a cavity, the rotating mechanism (8) comprises a transmission assembly (81), the transmission assembly (81) comprises a first friction wheel (811) fixedly sleeved on the first threaded sleeve (6), a transmission rod (812) movably arranged in the cavity and parallel to the first threaded sleeve (6), a second friction wheel (813) and a third friction wheel (814) fixedly sleeved on the transmission rod (812) and mirror images of each other, a worm (815) rotatably installed at the top of the cavity and perpendicular to the transmission rod (812), a fourth friction wheel (816) fixedly sleeved on the lower end of the worm (815) and matched with the third friction wheel (814), and a worm wheel (817) fixedly sleeved on the second threaded sleeve (7) and meshed with the worm (815), the first friction wheel (811) and the second friction wheel (813) are matched, and the rotating mechanism (8) further comprises a driving assembly (83) for driving the transmission rod (812) to rotate and a moving assembly (82) for driving the transmission rod (812) to move so that the second friction wheel (813) is tightly pressed against the first friction wheel (811) or the third friction wheel (814) is tightly pressed against the fourth friction wheel (816).

3. The screw module for a six-axis machining center according to claim 2, characterized in that: The moving assembly (82) comprises an electric push rod (821) fixed to the inner wall of the cavity and parallel to the transmission rod (812), and a connecting plate (822) fixed to the end of the electric push rod (821) and rotatably connected with the transmission rod (812).

4. The screw module for a six-axis machining center according to claim 3, characterized in that: The driving assembly (83) comprises a transmission sleeve (831) rotatably installed on the inner wall of the cavity and slidably matched with the transmission rod (812), and a driving motor (832) fixed to the slide base (5) and driving the transmission sleeve (831) to rotate, a first through groove (9) is formed in the position close to the driving motor (832) at the top of the first annular track (1), the driving motor (832) is located in the first through groove (9), a sliding block (10) is fixed to the side wall of the transmission rod (812), and a sliding groove (11) is arranged through the side wall of the transmission sleeve (831) and slidably matched with the sliding block (10).

5. The screw module for a six-axis machining center according to claim 4, characterized in that: Rolling columns (12) are movably installed on the top of the sliding block (10) and the bottom of the sliding block (10) and are in rolling connection with the inner wall of the sliding groove (11), and a plurality of rolling columns (12) are arranged.

6. The screw module for a six-axis machining center according to claim 2, characterized in that: The thickness of the third friction wheel (814) is greater than the thickness of the fourth friction wheel (816).

7. The screw module for a six-axis machining center according to claim 1, characterized in that: The top of the second annular track (2) is provided with a second through groove (13), the position of the side wall of the sliding seat (5) close to the second through groove (13) is provided with an inspection door (14) which is magnetically attracted to the sliding seat (5), and the position of the side wall of the inspection door (14) close to the second through groove (13) is provided with an auxiliary groove (15) which facilitates the opening and closing of the inspection door (14).

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