Multi-station precision rotary table

Abstract

The application relates to the technical field of precision rotary tables, in particular to a multi-station precision rotary table which comprises a base, a plurality of rotating discs, a plurality of worm wheels, a plurality of worm shafts, one or more than one axial position adjusting assemblies, an adjusting shaft sleeve and a first driving assembly. The first driving assembly drives a power transmission structure composed of the plurality of worm shafts connected in sequence to rotate, so that the screw parts of the plurality of worm shafts rotate synchronously, and then drive the plurality of worm wheels and the plurality of rotating discs to rotate synchronously. Before the multi-station precision rotary table works, firstly, the adjusting shaft sleeve is manually driven to move axially, and then the plurality of worm shafts are synchronously driven to move axially, so that the position of the screw part of the worm shaft closest to the adjusting shaft sleeve in the axial direction is finely adjusted, and the positions of the screw parts of the remaining worm shafts in the axial direction are coarsely adjusted. Then, the axial position adjusting assembly is used to independently finely adjust the position of the screw part of the corresponding worm shaft in the axial direction.

Description

Technical Field

[0001] This application relates to the field of precision rotary table technology, and in particular to a multi-station precision rotary table. Background Technology

[0002] In industries such as high-end manufacturing, precision measurement, photoelectric tracking, and multi-axis robotics, multi-station precision rotary tables are core actuators for achieving synchronous rotation or multi-degree-of-freedom positioning of multiple workpieces. Multi-station precision rotary tables place extremely high demands on the synchronization accuracy, transmission rigidity, and long-term stability between multiple rotating stations. Worm gear drives are widely used as transmission mechanisms for precision rotary tables due to their advantages such as good self-locking performance, high load-bearing capacity, and large transmission ratio.

[0003] For rotary tables with a single rotary position, a transmission structure consisting of a worm gear and a worm wheel is commonly used. A bushing is installed at one end of the worm. By adjusting the axial position of the bushing, the entire worm can be moved slightly along the axis, thereby adjusting the meshing between the helical part of the worm and the worm wheel, achieving compensation for transmission backlash and precision adjustment. However, for rotary tables with multiple rotary positions, the single worm gear transmission method faces significant technical limitations. First, if multiple helical parts are machined on a single worm, due to the overall length of the worm and the axial distribution of the helical parts, installation is often difficult due to limited assembly space on the base. Even if the installation problem is overcome by using a split base or special assembly process, the integrated worm gear still has the following inherent defects: limited by the machining accuracy and assembly error of the worm, it is difficult to maintain consistent meshing between each helical part and the corresponding worm wheel, and it is also difficult to adjust them to be consistent, resulting in the synchronous rotation accuracy of multiple worm wheels failing to meet design requirements. Second, to overcome the installation and precision problems of integrated worm gears, some existing technologies use multiple worms connected in sequence to form a power transmission structure. While achieving synchronous rotation of multiple helical sections is possible, the meshing position and clearance of each worm and its corresponding worm wheel are independent. Because the axial position of each worm cannot be adjusted independently, even if all worms are moved axially simultaneously by a single bushing, only the same axial displacement compensation can be applied to all worms. Independent and precise adjustments cannot be made to address the actual meshing differences at each workstation. Therefore, the synchronous rotation accuracy between the worm wheels cannot be effectively guaranteed, hindering the widespread application of multi-station precision rotary tables in precision machining and testing equipment.

[0004] The existing technical solutions described above have the following drawbacks: they cannot make independent and precise adjustments based on the actual meshing differences at each workstation. Therefore, the synchronous rotation accuracy between the worm gears cannot be effectively guaranteed, hindering the widespread application of multi-station precision rotary tables in precision machining and testing equipment. Summary of the Invention

[0005] In order to enable independent and precise adjustment of the meshing condition of each station, this application provides a multi-station precision rotary table.

[0006] This application provides a multi-station precision rotary table, which adopts the following technical solution: A multi-station precision rotary table, comprising: Base; Multiple rotating disks are distributed along the length of the base and are mounted on the top of the base in a way that allows them to rotate around their own axis. There are multiple worm gears, distributed along the length of the base, with their top ends fixedly connected to the bottom ends of the multiple rotating disks one by one. There are multiple worms, distributed along the length of the base, and each is rotatably mounted in the base and meshes with multiple worm wheels in a one-to-one correspondence; multiple worms are connected in sequence to form a power transmission structure. The adjusting bushing is installed at one end of the base and is rotatably connected to one end of the power transmission structure, used to drive the entire power transmission structure to move axially. There is one or more axial position adjustment components; each axial position adjustment component is located at the adjacent end of every two adjacent worms, and is used to drive the helical part of the corresponding worm to move axially. The first drive assembly, mounted at the other end of the base and connected to the other end of the power transmission structure, is used to drive the power transmission structure to rotate.

[0007] By adopting the above technical solution, the first drive assembly drives the power transmission structure, which consists of multiple worm gears connected in sequence, to rotate, so that the helical parts of the multiple worm gears rotate synchronously, thereby driving multiple worm wheels and multiple rotating disks to rotate synchronously. Before the multi-station precision rotary table starts working, the adjusting sleeve is first manually driven to move axially, thereby driving multiple worm gears to move synchronously axially. This allows the axial position of the helical part of the worm gear closest to the adjusting sleeve to be finely adjusted, and the axial position of the helical parts of the remaining worm gears to be coarsely adjusted. Then, the axial position adjusting assembly of each axial position is used to independently finely adjust the axial position of the corresponding worm gear's helical part, thereby compensating for differences in meshing state caused by differences in processing and installation. Overall, driving multiple worm gears to rotate with the same drive source simplifies the structure of the multi-station precision rotary table and effectively reduces manufacturing costs. Compared to a single worm gear, multiple worm gears are easier to install and have lower maintenance costs. While ensuring the synchronous rotation of the helical parts of multiple worm gears, the synchronous rotation accuracy of multiple worm wheels and multiple rotating disks is improved, which is conducive to the promotion and use of multi-station precision rotary tables.

[0008] This application is further configured such that: one end of one of every two adjacent worms is formed with an insertion part, and one end of the other worm is formed with a first insertion hole and an adjustment groove for the insertion part to be inserted; a second insertion hole is formed inside the insertion part; Each axial position adjustment assembly includes: The adjusting nut has its inner wall screwed to the outer wall of the insertion part, and one end abuts against the end face of another worm. The adjusting bolt has its head located inside the adjusting groove and abuts against the side wall of the adjusting groove near the first insertion hole, while the outer wall of its tail is screwed to the inner wall of the second insertion hole.

[0009] By adopting the above technical solution, when the worm gear on the right side needs to move to the left, firstly, the adjusting nut is manually rotated to move the adjusting screw to the left, thereby allowing the worm gear on the right side to move to the left. Then, the adjusting bolt is manually rotated to move the adjusting bolt to the left, thereby driving the worm gear on the right side to move to the left. When the worm gear on the right side needs to move to the right, firstly, the adjusting bolt is manually rotated to move the adjusting bolt to the right, thereby allowing the worm gear on the right side to move to the right. Then, the adjusting nut is manually rotated to move the adjusting screw to the right, thereby driving the worm gear on the right side to move to the right. The adjusting nut and adjusting bolt cooperate to produce a double adjustment and double locking effect. After adjustment, the structure has good stability, is not prone to loosening, and has high adjustment accuracy, allowing for small-amplitude fine adjustments to the axial position of the helical part of the worm gear on the right side.

[0010] This application is further configured such that each axial position adjustment assembly also includes: A pin sleeve is fitted onto the outer wall of the insertion part, and the outer wall is slidably connected to the inner wall of the first insertion hole; A coupling is fitted onto the adjacent ends of two adjacent worm gears.

[0011] By adopting the above technical solution, the pin sleeve not only improves the coaxiality of the two adjacent worms and has high guiding accuracy, but also reduces the resistance encountered by the right worm when it moves. The coupling effectively enhances the stability of power transmission and torsional stiffness, enabling the two adjacent worms to rotate synchronously.

[0012] This application further specifies that: the outer wall of the adjusting bushing is screwed to the base, and the inner wall is rotatably connected to one end of the power transmission structure through a bearing.

[0013] This application further specifies that the helical portion of each worm gear is a conical structure.

[0014] This application further specifies that the first driving component includes: Mounting base, which can be detachably mounted on one end of the base; The drive motor is detachably mounted on the side of the mounting base away from the base; The input shaft passes through the mounting base, with one end fixedly connected to the output shaft of the drive motor. The driving gear is fixed to the other end of the input shaft; The transmission gear is rotatably mounted on the side of the base near the mounting seat, and its side wall meshes with the side wall of the drive gear. The driven gear is rotatably mounted on the side of the base near the mounting seat, and its side wall meshes with the side wall of the transmission gear. The drive shaft has one end fixedly connected to the driven gear, and the other end has a third insertion hole for the end of the power transmission structure to be inserted. An axial adjustment gap is reserved between the third insertion hole and the end face of the power transmission structure.

[0015] By adopting the above technical solution, the drive motor drives the input shaft to rotate, thereby driving the drive gear to rotate, which in turn drives the transmission gear, driven gear and transmission shaft to rotate, thus driving multiple worm gears to rotate synchronously.

[0016] The present application is further configured such that: a relief groove is formed on one side of the base, and a plurality of lubricating oil inflow holes and a plurality of lubricating oil outflow holes are formed on the other side.

[0017] This application further includes: There are multiple support sleeves, each corresponding to a different worm gear, and they are fitted onto the worm gear. The outer walls of each sleeve are in contact with the interior of the base.

[0018] This application further includes: The cover is detachably installed on the end of the base near the adjusting bushing.

[0019] This application further includes: The frame; the base is rotatably mounted on top of the frame; The second drive assembly, mounted at the top of the frame and connected to one end of the base, is used to drive the base to rotate.

[0020] By adopting the above technical solution, when the second drive component drives the base to rotate, multiple rotating disks and the first drive component also rotate with the base.

[0021] In summary, the beneficial technical effects of this application are as follows: 1. The first drive assembly drives a power transmission structure consisting of multiple worm gears connected in sequence to rotate, so that the helical parts of the multiple worm gears rotate synchronously, thereby driving multiple worm wheels and multiple rotating disks to rotate synchronously. Before the multi-station precision rotary table starts working, the adjusting sleeve is first manually driven to move axially, thereby driving multiple worm gears to move synchronously axially. This allows for fine adjustment of the axial position of the helical part of the worm gear closest to the adjusting sleeve, and coarse adjustment of the axial position of the helical parts of the remaining worm gears. Then, each axial position adjusting assembly independently fine-tunes the axial position of the corresponding worm gear's helical part, thereby compensating for differences in meshing state caused by machining and installation variations. Overall, driving multiple worm gears to rotate using a single drive source simplifies the structure of the multi-station precision rotary table and effectively reduces manufacturing costs. Compared to a single worm gear, multiple worm gears are easier to install and have lower maintenance costs. While ensuring the synchronous rotation of the helical parts of multiple worm gears, the synchronous rotation accuracy of multiple worm wheels and multiple rotating disks is improved, which is conducive to the promotion and use of multi-station precision rotary tables.

[0022] 2. When the right worm needs to move to the left, first, manually rotate the adjusting nut to move the adjusting screw to the left, thus allowing the right worm to move to the left. Then, manually rotate the adjusting bolt to move it to the left, thus moving the right worm to the left. When the right worm needs to move to the right, first, manually rotate the adjusting bolt to move it to the right, thus allowing the right worm to move to the right. Then, manually rotate the adjusting nut to move the adjusting screw to the right, thus moving the right worm to the right. The adjusting nut and adjusting bolt work together to produce a double adjustment and double locking effect. After adjustment, the structure has good stability, is not prone to loosening, and has high adjustment accuracy, allowing for small-amplitude fine adjustments to the axial position of the helical part of the right worm. The pin sleeve improves the coaxiality of the two adjacent worms, has high guiding accuracy, and reduces the resistance encountered by the right worm during movement. The coupling effectively enhances the stability and torsional stiffness of power transmission, enabling two adjacent worm gears to rotate synchronously.

[0023] 3. The drive motor drives the input shaft to rotate, which in turn drives the drive gear to rotate, which in turn drives the transmission gear, driven gear and transmission shaft to rotate, thereby driving multiple worm gears to rotate synchronously. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of an embodiment of a multi-station precision rotary table; Figure 2 yes Figure 1The diagram shows the combined structure of the rotary table, including the rotary disk, worm gear, worm, axial position adjustment assembly, adjustment bushing, and first drive assembly. Figure 3 yes Figure 1 A cross-sectional view of the worm gear along the axial direction in the multi-station precision rotary table shown. Figure 4 yes Figure 3 A magnified view of a portion of region A in the middle; Figure 5 yes Figure 3 A magnified view of a portion of region B in the middle; Figure 6 yes Figure 1 The diagram shows the combined structure of the worm gear, axial position adjustment assembly, and first drive assembly in the multi-station precision rotary table. Figure 7 yes Figure 3 A magnified view of a portion of region C in the middle; Figure 8 yes Figure 1 The diagram shows the structure of the base in the multi-station precision rotary table. Figure 9 yes Figure 8 The diagram shows a structural schematic of the base from another perspective.

[0025] Reference numerals: 110, base; 111, clearance groove; 112, lubricating oil inlet hole; 113, lubricating oil outlet hole; 114, receiving groove; 115, receiving cavity; 120, rotating disk; 130, worm gear; 140, worm; 141, insertion part; 1411, second insertion hole; 142, first insertion hole; 143, adjusting groove; 144, helical part; 150, axial position adjusting assembly; 151, adjusting nut; 1 52. Adjusting bolt; 153. Pin sleeve; 154. Coupling; 160. Adjusting bushing; 161. Bearing; 170. First drive assembly; 171. Mounting base; 172. Drive motor; 173. Input shaft; 174. Drive gear; 175. Transmission gear; 176. Driven gear; 177. Drive shaft; 1771. Third insertion hole; 1772. Axial adjustment clearance; 180. Support sleeve; 190. Cover. Detailed Implementation

[0026] The following is in conjunction with the appendix Figure 1-9 This application will be described in further detail.

[0027] Reference Figure 1 and Figure 2This application discloses a multi-station precision rotary table, including a base 110, multiple rotary disks 120, multiple worm gears 130, multiple worm shafts 140, one or more axial position adjustment components 150, adjustment sleeves 160, and a first drive component 170. The base 110 supports the multiple rotary disks 120, multiple worm gears 130, multiple worm shafts 140, and the first drive component 170, and accommodates the multiple worm gears 130 and multiple worm shafts 140. The multiple rotary disks 120 are distributed along the length of the base 110 and are rotatably mounted on the top of the base 110 around their own axes. It should be noted that a workpiece can be mounted on each rotary disk 120 to drive the workpiece to rotate. The multiple worm gears 130 are distributed along the length of the base 110, and their top ends are fixedly connected to the bottom ends of the multiple rotary disks 120 one-to-one. Multiple worm gears 140 are distributed along the length of the base 110 and are rotatably mounted within the base 110, meshing with multiple worm wheels 130 in a one-to-one correspondence. The multiple worm gears 140 are sequentially connected to form a power transmission structure. The multiple worm wheels 130 cooperate with the multiple worm gears 140 to drive multiple rotating disks 120 to rotate synchronously. An adjusting sleeve 160 is mounted at one end of the base 110 and rotatably connected to one end of the power transmission structure, driving the entire power transmission structure to move axially. Each axial position adjusting component 150 is located at the adjacent ends of every two adjacent worm gears 140, driving the helical portion 144 of the corresponding worm gear 140 to move axially. A first drive component 170 is mounted at the other end of the base 110 and connected to the other end of the power transmission structure, driving the power transmission structure to rotate. The first drive assembly 170 drives the power transmission structure, which consists of multiple worm gears 140 connected in sequence, to rotate, so that the helical portions 144 of the multiple worm gears 140 rotate synchronously, thereby driving multiple worm wheels 130 and multiple rotating disks 120 to rotate synchronously. Before the multi-station precision rotary table starts working, the adjusting sleeve 160 is first manually driven to move axially, thereby driving the multiple worm gears 140 to move synchronously axially. This allows the axial position of the helical portion 144 of the worm gear 140 closest to the adjusting sleeve 160 to be finely adjusted, and the axial position of the helical portions 144 of the remaining worm gears 140 to be coarsely adjusted. Then, the axial position of the corresponding helical portion 144 of the worm gear 140 is finely adjusted independently using each axial position adjusting assembly 150, thereby compensating for differences in meshing state caused by differences in processing and installation. Overall, the rotation of multiple worm gears 140 by a single drive source simplifies the structure of the multi-station precision rotary table and effectively reduces manufacturing costs. Compared to a single worm gear 140, multiple worm gears 140 are easier to install and have lower maintenance costs. While ensuring the synchronous rotation of the helical parts 144 of multiple worm gears 140, the synchronous rotation accuracy of multiple worm wheels 130 and multiple rotary tables 120 is improved, which is beneficial for the widespread use of multi-station precision rotary tables.

[0028] It should be noted that there can be two rotary disks 120, worm gears 130, and worms 140, and correspondingly, one axial position adjustment assembly 150. Alternatively, there can be three or more rotary disks 120, worm gears 130, and worms 140, and correspondingly, two or more axial position adjustment assemblies 150. However, the adjusting bushing 160 and the first drive assembly 170 are always a single unit.

[0029] For example, when there are two rotary disks 120, worm gears 130, and worms 140, and one axial position adjustment assembly 150, before the multi-station precision rotary table begins operation, the adjusting sleeve 160 is first manually driven to move axially, thereby causing the two worms 140 to move synchronously axially. This allows for fine-tuning of the axial position of the helical portion 144 of one worm 140 and coarse-tuning of the axial position of the helical portion 144 of the other worm 140. Then, the axial position adjustment assembly 150 is used to fine-tune the axial position of the helical portion 144 of the other worm 140.

[0030] Reference Figure 2 , Figure 3 and Figure 4 In one embodiment, one end of each pair of adjacent worm gears 140 has an insertion portion 141, and the other end of the other worm gear 140 has a first insertion hole 142 and an adjustment groove 143 for insertion of the insertion portion 141. The adjustment groove 143 facilitates manual operation of the adjustment bolt 152. A second insertion hole 1411 is formed inside the insertion portion 141. The adjacent ends of each pair of adjacent worm gears 140 are engaged through the insertion portion 141 and the first insertion hole 142. Each axial position adjustment assembly 150 includes an adjusting nut 151, an adjusting bolt 152, a pin sleeve 153, and a coupling 154. The inner wall of the adjusting nut 151 is screwed to the outer wall of the insertion portion 141, and one end abuts against the end face of the other worm gear 140. The head of the adjusting bolt 152 is located inside the adjusting groove 143 and abuts against the side wall of the adjusting groove 143 near the first insertion hole 142, while the outer wall of the tail is screwed to the inner wall of the second insertion hole 1411. Figure 4As shown, when the worm gear 140 on the right needs to move to the left, firstly, the adjusting nut 151 is manually rotated to move to the left, thereby allowing the worm gear 140 on the right to move to the left. Then, the adjusting bolt 152 is manually rotated to move to the left, thereby causing the worm gear 140 on the right to move to the left. When the worm gear 140 on the right needs to move to the right, firstly, the adjusting bolt 152 is manually rotated to move to the right, thereby allowing the worm gear 140 on the right to move to the right. Then, the adjusting nut 151 is manually rotated to move the adjusting screw to the right, thereby causing the worm gear 140 on the right to move to the right. The adjusting nut 151 and the adjusting bolt 152 cooperate to produce a double adjustment and double locking effect. After adjustment, the structure has good stability and is not prone to loosening. The adjustment accuracy is also high, allowing for small-amplitude fine adjustments to the axial position of the helical part 144 of the worm gear 140 on the right. A pin sleeve 153 is fitted onto the outer wall of the insertion portion 141, and the outer wall is slidably connected to the inner wall of the first insertion hole 142. The pin sleeve 153 improves the coaxiality of the two adjacent worm gears 140, provides high guiding accuracy, and reduces the resistance encountered when the right worm gear 140 moves. A coupling 154 is fitted onto the adjacent ends of the two adjacent worm gears 140. It should be noted that the coupling 154 consists of two parts: one part is fitted onto the end of one worm gear 140 where the insertion portion 141 is formed, and the other part is fitted onto the end of the other worm gear 140 where the first insertion hole 142 is formed. Before adjusting the position of the right worm gear 140 using the adjusting nut 151 and adjusting bolt 152, the two parts of the coupling 154 should be disconnected to avoid interference with the position adjustment process of the adjusting nut 151 and adjusting bolt 152. After the position adjustment is completed, the two parts of the coupling 154 are then reconnected. Coupling 154 effectively enhances the stability and torsional stiffness of power transmission, enabling two adjacent worm gears 140 to rotate synchronously.

[0031] Reference Figure 3 In one embodiment, the outer wall of the adjusting sleeve 160 is screwed to the base 110, and the inner wall is rotatably connected to one end of the power transmission structure via a bearing 161. When the adjusting sleeve 160 is manually rotated, it can move axially to drive the power transmission structure to move axially, thereby achieving the purpose of fine-tuning the position of one of the worm gears 140 and coarse-tuning the positions of the remaining worm gears 140.

[0032] Reference Figure 3 and Figure 5 In one embodiment, the helical portion 144 of each worm gear 140 is a conical structure, and the angle α between the outer wall of the helical portion 144 and the horizontal plane is 1-5°. This further improves the synchronous rotation accuracy.

[0033] Reference Figure 3 , Figure 6 and Figure 7 In one embodiment, the first drive assembly 170 includes a mounting base 171, a drive motor 172, an input shaft 173, a drive gear 174, a transmission gear 175, a driven gear 176, and a transmission shaft 177. The mounting base 171 is detachably mounted to one end of the base 110 for easy assembly and disassembly. The drive motor 172 is detachably mounted on the side of the mounting base 171 away from the base 110 for easy assembly and disassembly. The input shaft 173 passes through the mounting base 171, with one end fixedly connected to the output shaft of the drive motor 172. The drive gear 174 is fixed to the other end of the input shaft 173. The transmission gear 175 is rotatably mounted on the side of the base 110 near the mounting base 171, with its sidewall meshing with the sidewall of the drive gear 174. The driven gear 176 is rotatably mounted on the side of the base 110 near the mounting base 171, with its sidewall meshing with the sidewall of the transmission gear 175. One end of the drive shaft 177 is fixedly connected to the driven gear 176, and the other end has a third insertion hole 1771 for inserting the end of the power transmission structure. The drive motor 172 drives the input shaft 173 to rotate, which in turn drives the driving gear 174 to rotate, thereby driving the transmission gear 175, the driven gear 176, and the drive shaft 177 to rotate, thus causing multiple worm gears 140 to rotate synchronously. Furthermore, an axial adjustment clearance 1772 is provided between the third insertion hole 1771 and the end face of the power transmission structure to facilitate adjustment of the position of each worm gear 140. It should be noted that the diameter of the driven gear 176 is larger than the diameter of the driving gear 174, and the diameter of the transmission gear 175 is larger than the diameter of the driven gear 176. This allows for a larger reduction ratio within a limited space and avoids excessively large diameters for single-stage gears.

[0034] Preferably, the mounting base 171 and the base 110 are detachably connected by bolts. The drive motor 172 and the mounting base 171 are also detachably connected by bolts. The drive motor 172 can be a servo motor, which offers high motion precision. Alternatively, the drive motor 172 can be a stepper motor, which has lower manufacturing and maintenance costs.

[0035] Reference Figure 1 , Figure 8 and Figure 9 In one embodiment, a clearance groove 111 is formed on one side of the base 110, and a plurality of lubricating oil inlet holes 112 and a plurality of lubricating oil outlet holes 113 are formed on the other side. The clearance groove 111 facilitates the operation of the axial position adjustment assembly 150 by the operator. Lubricating oil can be introduced into the base 110 through each lubricating oil inlet hole 112 to reduce the resistance to the rotation of each worm gear 130. Lubricating oil in the base 110 can be discharged through each lubricating oil outlet hole 113.

[0036] Preferably, a receiving groove 114 is formed on one side of the base 110. The receiving groove 114 is used to receive the driving gear 174, the transmission gear 175, and the driven gear 176. A plurality of receiving cavities 115 are uniformly formed on the base 110 along its length. Each receiving cavity 115 is used to receive a worm gear 130.

[0037] Reference Figure 1 and Figure 2 In one embodiment, the multi-station precision rotary table further includes multiple support sleeves 180 and a cover 190. The multiple support sleeves 180 are fitted onto the worm gears 140 in a one-to-one correspondence, with their outer walls contacting the interior of the base 110, providing radial support to the corresponding worm gear 140 and reducing the possibility of bending and vibration during rotation. The cover 190 is detachably installed on the end of the base 110 near the adjusting bushing 160, serving as an isolation and sealing function.

[0038] Preferably, the cover 190 is detachably connected to the base 110 by screws.

[0039] In one embodiment, the multi-station precision rotary table further includes a frame (not shown) and a second drive assembly (not shown). A base 110 is rotatably mounted on the top of the frame. The second drive assembly is mounted on the top of the frame and connected to one end of the base 110, for driving the base 110 to rotate. It should be noted that... Figure 1 The direction of the arrow indicates the rotation direction of the base 110. When the second drive assembly drives the base 110 to rotate, the plurality of rotating disks 120 and the first drive assembly 170 also rotate with the base 110.

[0040] It should be noted that the second drive component includes a servo motor. The output shaft of the servo motor is connected to one end of the base 110 via a drive belt / chain / worm gear and pulley / sprocket / worm wheel to drive the base 110 to rotate.

[0041] The implementation principle of this embodiment is as follows: The first drive assembly 170 drives the power transmission structure, which is composed of multiple worm gears 140 connected in sequence, to rotate, so that the helical portions 144 of the multiple worm gears 140 rotate synchronously, thereby driving multiple worm wheels 130 and multiple rotating disks 120 to rotate synchronously. Before the multi-station precision rotary table starts working, firstly, the adjusting bushing 160 is manually driven to move axially, thereby driving the multiple worm gears 140 to move synchronously axially, so that the axial position of the helical portion 144 of the worm gear 140 closest to the adjusting bushing 160 can be finely adjusted, and the axial position of the helical portion 144 of the remaining worm gears 140 can be coarsely adjusted. Then, the axial position of the corresponding worm gear 140's helical portion 144 is independently finely adjusted using each axial position adjusting assembly 150, thereby compensating for differences in meshing state caused by differences in processing and installation. Overall, the rotation of multiple worm gears 140 by the same drive source simplifies the structure of the multi-station precision rotary table and effectively reduces manufacturing costs. Compared to a single worm gear 140, multiple worm gears 140 are easier to install and have lower maintenance costs. While ensuring the synchronous rotation of the helical parts 144 of multiple worm gears 140, the synchronous rotation accuracy of multiple worm wheels 130 and multiple rotary tables 120 is improved, which is beneficial for the widespread use of multi-station precision rotary tables.

[0042] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A multi-station precision rotary table, characterized in that, include: Base (110); Multiple rotating disks (120) are distributed along the length of the base (110) and are respectively mounted on the top of the base (110) in a rotatable manner around their own axis. There are multiple worm gears (130), which are distributed along the body length of the base (110) and whose top ends are fixedly connected to the bottom ends of the multiple rotating disks (120) one by one. There are multiple worm gears (140) distributed along the length of the base (110), and each is rotatably installed in the base (110) and meshes with multiple worm wheels (130) in a one-to-one correspondence; the multiple worm gears are connected in sequence to form a power transmission structure; An adjusting bushing (160) is installed at one end of the base (110) and rotatably connected to one end of the power transmission structure, used to drive the entire power transmission structure to move axially. Axial position adjustment assembly (150) is one or more; each axial position adjustment assembly (150) is disposed at the adjacent end of each pair of adjacent worms (140) and is used to drive the helical part (144) of the corresponding worm (140) to move axially; A first drive assembly (170) is installed at the other end of the base (110) and connected to the other end of the power transmission structure, for driving the power transmission structure to rotate.

2. The multi-station precision rotary table according to claim 1, characterized in that, One end of each pair of adjacent worm gears (140) is formed with an insertion portion (141), and the other end of the worm gear (140) is formed with a first insertion hole (142) and an adjustment groove (143) for insertion of the insertion portion (141); a second insertion hole (1411) is formed inside the insertion portion (141). Each of the axial position adjustment components (150) includes: The adjusting nut (151) has its inner wall screwed to the outer wall of the insertion part (141), and one end abuts against the end face of the other worm (140). The head of the adjusting bolt (152) is located in the adjusting groove (143) and abuts against the side wall of the adjusting groove (143) near the first insertion hole (142), and the outer wall of the tail is screwed to the inner wall of the second insertion hole (1411).

3. The multi-station precision rotary table according to claim 2, characterized in that, Each of the axial position adjustment components (150) further includes: A pin sleeve (153) is fitted onto the outer wall of the insertion part (141), and the outer wall is slidably connected to the inner wall of the first insertion hole (142). A coupling (154) is fitted onto the adjacent ends of two adjacent worm gears (140).

4. The multi-station precision rotary table according to any one of claims 1 to 3, characterized in that, The outer wall of the adjusting bushing (160) is screwed to the base (110), and the inner wall is rotatably connected to one end of the power transmission structure through a bearing (161).

5. The multi-station precision rotary table according to any one of claims 1 to 3, characterized in that, The helical portion (144) of each worm (140) is a conical structure.

6. The multi-station precision rotary table according to any one of claims 1 to 3, characterized in that, The first driving component (170) includes: Mounting base (171) is detachably mounted to one end of the base (110); A drive motor (172) is detachably mounted on the side of the mounting base (171) away from the base (110); An input shaft (173) is inserted into the mounting base (171), and one end is fixedly connected to the output shaft of the drive motor (172); The drive gear (174) is fixed to the other end of the input shaft (173); The transmission gear (175) is rotatably mounted on the side of the base (110) near the mounting base (171), and its side wall meshes with the side wall of the drive gear (174). The driven gear (176) is rotatably mounted on the side of the base (110) near the mounting base (171), and its side wall meshes with the side wall of the transmission gear (175). The drive shaft (177) is fixedly connected at one end to the driven gear (176), and the other end is formed with a third insertion hole (1771) for the end of the power transmission structure to be inserted, and an axial adjustment gap (1772) is reserved between the third insertion hole (1771) and the end face of the power transmission structure.

7. The multi-station precision rotary table according to any one of claims 1 to 3, characterized in that, The base (110) has a relief groove (111) on one side and a plurality of lubricating oil inflow holes (112) and a plurality of lubricating oil outflow holes (113) on the other side.

8. The multi-station precision rotary table according to any one of claims 1 to 3, characterized in that, Also includes: Multiple support sleeves (180) are fitted onto the worm gears (140) in a one-to-one correspondence with each of the worm gears (140), and their outer walls are in contact with the interior of the base (110).

9. The multi-station precision rotary table according to any one of claims 1 to 3, characterized in that, Also includes: The cover (190) is detachably mounted on one end of the base (110) near the adjusting bushing (160).

10. The multi-station precision rotary table according to any one of claims 1 to 3, characterized in that, Also includes: frame; The base (110) is rotatably mounted on the top of the frame; The second drive assembly is installed at the top of the frame and connected to one end of the base (110) to drive the base (110) to rotate.

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