Turntable anti-backlash structure
By using a bevel gear set and an elastic element as a transfer component in the machine tool rotary table, the problem of the fit clearance in the dual-gear drive structure was solved, achieving higher machining accuracy and transmission efficiency, extending equipment life and optimizing space utilization.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NEWAY CNC EQUIPMENT (SUZHOU) CO LTD
- Filing Date
- 2025-04-15
- Publication Date
- 2026-04-21
AI Technical Summary
The existing dual-gear drive structure of machine tool rotary tables has a clearance, which leads to rotary table indexing error and affects machining accuracy. In addition, the worm gear structure is prone to wear under high load, which increases costs and has low space utilization.
The intermediate component, consisting of a bevel gear set and an elastic element, provides preload through the elastic element, making the helical gear mesh more tightly. Combined with the bevel gear structure, it achieves backlash elimination, improving transmission efficiency and space utilization.
It effectively reduces the accuracy error during rotary table indexing, improves workpiece machining accuracy, extends service life, reduces manufacturing costs, and improves space utilization.
Smart Images
Figure CN224144103U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of boring machine rotary table technology, and in particular to a rotary table backlash elimination structure. Background Technology
[0002] Machine tool rotary tables typically employ either dual-motor drive or dual-gear drive structures to achieve rotary feed motion. While dual-motor drive structures offer better performance, they are more expensive and have a more complex control system. Therefore, dual-gear drive structures offer better cost-effectiveness.
[0003] In dual-gear drive structures, spur gears or helical gears are usually used because there is always a clearance between gears during the meshing process. Especially when using spur gears, it is easy to cause indexing errors on the turntable, which will affect the machining accuracy of the workpiece. At the same time, the gearbox usually uses a worm gear structure for further deceleration. However, the worm gears have close contact and are prone to severe wear under long-term high-speed and high-load working conditions, which will shorten their service life and increase manufacturing costs. Moreover, the space utilization rate of the worm gear is low in the limited drive gearbox. Utility Model Content
[0004] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a backlash-free turntable structure, the technical solution of which is as follows:
[0005] A backlash-free turntable structure includes a housing, a drive unit, a bevel gear set, a transfer assembly, a transmission wheel set, and an output unit. The drive unit and the output unit are mounted on the outside of the housing, while the bevel gear set and the transmission wheel set are mounted inside the housing. The drive unit is drively connected to the bevel gear set, and the output unit is drively connected to the transmission wheel set. The bevel gear set is drively connected to the transmission wheel set via the transfer assembly. The transfer assembly is rotatably mounted on the housing and includes an elastic element, the two ends of which abut against the housing and the transmission wheel set.
[0006] Furthermore, the bevel gear set includes a first bevel gear, a second bevel gear, and a shaft gear. The shaft gear is rotatably mounted on the housing. The first bevel gear is connected to the drive unit for transmission. The second bevel gear is mounted on the shaft of the shaft gear. The first helical gear and the second helical gear mesh.
[0007] Furthermore, the transfer assembly also includes a transfer gear and a drive shaft. The drive shaft is rotatably mounted on the housing, and the transfer gear is mounted on the drive shaft. The shaft gear meshes with the transfer gear.
[0008] Furthermore, the transmission wheel assembly includes a first transmission gear and a second transmission gear, the first transmission gear and the second transmission gear meshing, the first transmission gear being mounted on the transmission shaft, the elastic member having both ends abutting against the first transmission gear and the housing, and the second transmission gear being drivingly connected to the output part.
[0009] Furthermore, the transmission wheel set also includes an output shaft, which is rotatably mounted on the housing, and the second transmission gear is mounted on the output part, with the output shaft being drively connected to the output shaft.
[0010] Furthermore, the first transmission gear and the second transmission gear are helical gears.
[0011] Furthermore, there are multiple first transmission gears and multiple second transmission gears, with each first transmission gear and each second transmission gear corresponding to the other, and multiple first transmission gears are sequentially mounted on the drive shaft.
[0012] Furthermore, the housing is provided with a partition, the bevel gear set and the transmission wheel set are located on both sides of the partition, the transmission shaft passes through the partition, and the elastic element abuts against the partition and the transmission wheel set.
[0013] Furthermore, the elastic element is a butterfly spring.
[0014] Furthermore, the drive unit includes a servo motor and a reducer, the servo motor being driven by the reducer, and the reducer being driven by the first bevel gear.
[0015] The advantages of this utility model are: the preload provided by the elastic element makes the helical gear mesh more tightly, thereby achieving the effect of eliminating backlash, effectively reducing the accuracy error during turntable indexing, and improving the workpiece machining accuracy; the bevel gear structure improves the transmission effect, and the compact structure can realize the shift transmission, effectively transmit torque, and improve the space utilization rate inside the housing. Attached Figure Description
[0016] Figure 1 This is a perspective view of a turntable gap-eliminating structure according to the present invention;
[0017] Figure 2 This is a cross-sectional view of a turntable gap-eliminating structure according to the present invention;
[0018] Figure 3 This is a side view of a turntable gap-eliminating structure according to the present invention.
[0019] In the picture:
[0020] 1. Housing; 11. Partition; 2. Drive unit; 21. Motor; 22. Reducer; 3. Bevel gear set; 31. First bevel gear; 32. Second bevel gear; 33. Shaft gear; 4. Transfer assembly; 41. Drive shaft; 42. Transfer gear; 43. Elastic element; 5. Transmission wheel set; 51. First helical gear; 52. Second helical gear; 53. Output shaft; 6. Output unit. Detailed Implementation
[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / as well" as used herein includes any and all combinations of one or more of the associated listed items.
[0023] The following describes the embodiments in conjunction with the appendix. Figure 1-3 This utility model will be described in further detail.
[0024] A backlash-free turntable structure includes a housing 1, a drive unit 2, a bevel gear set 3, a transfer component 4, a transmission wheel set 5, and an output unit 6.
[0025] The housing 1 is provided with a partition 11, which divides the space and is used to install components.
[0026] The drive unit 2 includes a servo motor 21 and a reducer 22. The servo motor 21 is used to provide power, and the motor 21 and the reducer 22 are connected in a transmission connection.
[0027] The bevel gear set 3 includes a first bevel gear 31, a second bevel gear 32, and a shaft gear 33. The second bevel gear 32 is fixed on the shaft of the shaft gear 33, and the first bevel gear 31 and the second bevel gear 32 mesh.
[0028] The transfer assembly 4 includes a drive shaft 41, a transfer gear 42, and an elastic element 43. The transfer gear 42 and the elastic element 43 are mounted on the drive shaft 41. In this embodiment, the elastic element 43 is a butterfly spring.
[0029] The transmission gear set 5 includes a first helical gear 51, a second helical gear 52, and an output shaft 53. The second helical gear 52 is mounted on the output shaft 53. The first helical gear 51 and the second helical gear 52 mesh. There are multiple first helical gears 51 and second helical gears 52. The first helical gears 51 and the second helical gears 52 correspond one-to-one. Specifically, in this embodiment, there are two first helical gears 51 and two helical gears 52.
[0030] Connection relationship of a backlash-free turntable structure:
[0031] The drive unit 2 and the output unit 6 are installed on the outside of the housing 1. The bevel gear set 3, the intermediate component 4, and the transmission wheel set 5 are installed inside the housing 1. The output end of the reducer 22 is fixedly connected to the first bevel gear 31 in the bevel gear set 3, thereby transmitting the power of the servo motor 21 to the bevel gear set 3. The bevel gear set 3 and the transmission wheel set 5 are located on both sides of the partition 11. The drive shaft 41 of the intermediate component 4 passes through the partition 11. The intermediate gear 42, the elastic element 43, and the first helical gear 51 are sequentially installed on the drive shaft 41. The intermediate gear 42 meshes with the shaft gear 33. The two ends of the elastic element 43 abut against the first helical gear 51 and the partition 11. The output shaft 53 is rotatably installed on the housing 1 and is connected to the output unit 6 in a transmission manner.
[0032] Working principle of a backlash-free turntable structure:
[0033] When motor 21 starts, the reduced power is transmitted to the first bevel gear 31 via reducer 22. The rotation of the first bevel gear 31 drives the second bevel gear 32 to rotate. The second bevel gear 32 is fixed to the shaft gear 33. The intermediate gear 42 meshes with the shaft gear 33. The second bevel gear 32 drives the intermediate gear 42 through the shaft gear 33, thereby driving the first helical gear 51 on the transmission shaft 41 to rotate. The first helical gear 51 drives the second helical gear 52, thereby transmitting power to the output section 6 through the output shaft 53. The transmission shaft 41 is provided with an elastic element 43 that abuts against the first helical gear 51 and the partition 11. The compression of the elastic element 43 provides a preload force, thereby making the meshing between the first helical gear 51 and the second helical gear 52 tighter, thus achieving a backlash elimination effect, effectively reducing the accuracy error during turntable indexing, and improving the workpiece machining accuracy.
[0034] The advantages of this utility model are:
[0035] The preload provided by the elastic element 43 makes the helical gear mesh more tightly, thereby achieving the effect of eliminating backlash, effectively reducing the accuracy error during turntable indexing, and improving the machining accuracy of the workpiece; the bevel gear structure improves the transmission effect, and the compact structure can realize the shift transmission, effectively transmit torque, and improve the space utilization rate inside the housing 1.
[0036] The above embodiments only illustrate one implementation of the present utility model, and should not be construed as limiting the scope of the utility model patent. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present utility model. These are all equivalent modifications and improvements made to the above embodiments based on the essential technology of the present utility model, and all of these fall within the protection scope of the present utility model.
Claims
1. A lost motion structure for a turret, comprising a housing, characterized in that: The drive part, the bevel gear set, the transfer assembly, the transmission wheel set and the output part are arranged outside the shell, the bevel gear set and the transmission wheel set are arranged inside the shell, the drive part is in transmission connection with the bevel gear set, the output part is in transmission connection with the transmission wheel set, the bevel gear set is in transmission connection with the transmission wheel set through the transfer assembly, the transfer assembly is rotatably arranged in the shell, and the transfer assembly comprises elastic members, the two ends of the elastic members abut against the shell and the transmission wheel set.
2. The slew ring structure according to claim 1, wherein: The bevel gear set comprises a first bevel gear, a second bevel gear and a shaft gear, the shaft gear is rotatably arranged in the shell, the first bevel gear is in transmission connection with the drive part, the second bevel gear is arranged on the shaft of the shaft gear, and the first bevel gear and the second bevel gear are in meshing engagement.
3. The slew ring structure according to claim 2, wherein: The transfer assembly further comprises a transfer gear and a transmission shaft, the transmission shaft is rotatably arranged in the shell, the transfer gear is arranged on the transmission shaft, and the shaft gear is in meshing engagement with the transfer gear.
4. The slew ring structure according to claim 3, wherein: The transmission wheel set comprises a first transmission gear and a second transmission gear, the first transmission gear and the second transmission gear are in meshing engagement, the first transmission gear is arranged on the transmission shaft, the two ends of the elastic members abut against the first transmission gear and the shell, and the second transmission gear is in transmission connection with the output part.
5. The slew ring structure according to claim 4, wherein: The transmission wheel set further comprises an output shaft, the output shaft is rotatably arranged in the shell, the second transmission gear is arranged on the output part, and the output shaft is in transmission connection with the output shaft.
6. The slew ring structure of claim 4, wherein: The first transmission gear and the second transmission gear are bevel gears.
7. The slew ring structure of claim 4, wherein: The number of the first transmission gears is plural, the number of the second transmission gears is plural, the first transmission gears and the second transmission gears are in one-to-one correspondence, and the plural first transmission gears are sequentially arranged on the transmission shaft.
8. The slew ring structure of claim 1, wherein: The shell is provided with a partition layer, the bevel gear set and the transmission wheel set are arranged on the two sides of the partition layer, the transmission shaft is arranged in the partition layer, and the elastic members abut against the partition layer and the transmission wheel set.
9. The anti-backlash structure of a rotary table according to claim 1, characterized in that: The elastic members are butterfly springs.
10. The anti-backlash structure of a rotary table according to claim 2, characterized in that: The drive part comprises a servo motor and a speed reducer, the servo motor is in transmission connection with the speed reducer, and the speed reducer is in transmission connection with the first bevel gear.