Multi-shaft power head with PU friction wheel
By using PU friction wheels instead of gears in multi-axis power heads, the noise and rapid heating problems caused by gear transmission are solved, and the power head with lower noise, higher accuracy and longer life is achieved.
Patent Information
- Application Number
- CN202422227808.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-11
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-09-11
AI Technical Summary
The existing multi-axis power heads are mostly driven by gears, causing noise and rapid heating, which can easily cause damage to the power head.
Instead of traditional gears, PU friction wheels are used to transfer torque through the outer diameter surface, reducing noise and improving machining accuracy.
It effectively reduces noise and temperature increase, extends the service life of the power head, and improves processing accuracy.
Smart Images
Figure CN223028491U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of multi-axis power heads, and particularly relates to a multi-axis power head with a PU friction wheel. Background Technique
[0002] A power head is a power component that can achieve the main motion and feed motion and has an automatic workpiece cycle. It is a relatively simple variable-speed transmission mechanism with various forms. The basic principle is that a motor drives a gear speed-changing mechanism, which can realize functions such as boring, milling, and drilling. The power head is also called a power tool holder, which refers to a tool holder installed on a power turret and driven by a servo motor. This kind of tool holder is generally applied to a turning-milling compound machine, and a few can also be applied to a machining center with a power turret. Most of the existing multi-axis power heads use gears for transmission inside. The driving gear meshes with multiple driven gears, and the multiple driven gears rotate around a driving gear. Gears will generate noise during operation, and the friction between the gears will cause the temperature inside the power head to rise rapidly, easily causing damage to the power head. For this reason, we propose a multi-axis power head with a PU friction wheel. Content of the Utility Model
[0003] In order to solve the above problems, the utility model provides a multi-axis power head with a PU friction wheel. The utility model solves the problem that most of the existing multi-axis power heads use gears for transmission inside. The driving gear meshes with multiple driven gears, and the multiple driven gears rotate around a driving gear. Gears will generate noise during operation, and the friction between the gears will cause the temperature inside the power head to rise rapidly, easily causing damage to the power head.
[0004] A multi-axis power head with a PU friction wheel in the utility model includes a bottom plate. In the middle above the bottom plate, there is a power box. In the middle on one side above the power box, there is a motor. The rotating shaft of the motor penetrates through the power box and is fixedly connected to a driving shaft. On the side of the driving shaft in the power box away from the motor, there is a first PU wheel. On both sides below the driving shaft in the power box, there are transmission shafts. On the transmission shafts, there are second PU wheels that match the first PU wheel. On both sides below the transmission shafts in the power box, there are output shafts. On the output shafts, there are third PU wheels that match the second PU wheel. The side of the output shaft away from the motor extends to the outside of the power box.
[0005] In the above solution, the first PU wheel is in mutual contact with the second PU wheels on both sides below it, and the second PU wheels are in mutual contact with the third PU wheels on both sides below them.
[0006] In the above solution, both ends of the driving shaft are movably connected to the power box through a rear main shaft bearing seat and a front main shaft bearing seat respectively. On the side of the front main shaft bearing seat away from the driving shaft, there is a main shaft end cover.
[0007] In the above solution, both ends of the transmission shaft are movably connected to the side wall of the power box, and a transmission shaft end cover is provided on the side of the power box away from the motor where the transmission shaft is located.
[0008] In the above solution, an output shaft bearing seat is provided at one end of the output shaft close to the motor. The output shaft bearing seat is fixedly connected to the power box. A tapered roller bearing is provided between the output shaft and the output shaft bearing seat. An output shaft rear seal cover is provided on the side of the tapered roller bearing close to the motor, and a shaft tail end sealing ring is provided between the output shaft rear seal cover and the output shaft bearing seat.
[0009] In the above solution, one end of the output shaft away from the motor is movably connected to the power box through a deep groove ball bearing. An output shaft seal flange is provided on the side of the power box away from the motor where the deep groove ball bearing is located. An output shaft front seal cover is provided on the side of the output shaft seal flange away from the deep groove ball bearing, and a shaft front end sealing ring is provided between the output shaft front seal cover and the output shaft seal flange.
[0010] In the above solution, a plurality of equally spaced mounting holes are provided on both sides of the bottom plate.
[0011] The advantages and beneficial effects of the present utility model are as follows: The present utility model provides a multi-axis power head with a PU friction wheel. The PU friction wheel transmits torque by tightly attaching to the outer diameter surface, producing lower noise than the conventional gear meshing for torque transmission. At the same time, there is no influence on the accuracy of the processed hole due to the small tooth gaps in the gear transmission, resulting in a significant improvement in the surface roughness of the hole wall. It is suitable for manufacturing a high-precision light-cutting multi-axis processing power box to replace the traditional gear. The surface of the friction wheel is glued with PU, reducing the complicated procedures of gear processing, lowering the manufacturing cost, and the machining accuracy of the outer diameter of the friction wheel is also much lower than that of hobbing. PU has good friction coefficient and heat resistance, and can fully adapt as a new option to replace the gear of the multi-axis small-torque power box. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.
[0013] Figure 1 It is a structural schematic diagram of the present utility model;
[0014] Figure 2 It is a first cross-sectional view of the present utility model;
[0015] Figure 3 It is a second cross-sectional view of the present utility model;
[0016] Figure 4 This is the third cross-sectional view of the present utility model.
[0017] In the figure: 1. Base plate; 2. Power box; 3. Motor; 4. Driving shaft; 5. First PU wheel; 6. Transmission shaft; 7. Second PU wheel; 8. Output shaft; 9. Third PU wheel; 10. Rear bearing seat of main shaft; 11. Front bearing seat of main shaft; 12. End cover of main shaft; 13. End cover of transmission shaft; 14. Bearing seat of output shaft; 15. Tapered roller bearing; 16. Seal ring at the tail end of the shaft; 17. Rear seal cover of output shaft; 18. Deep groove ball bearing; 19. Sealing flange of output shaft; 20. Seal ring at the front end of the shaft; 21. Front seal cover of output shaft; 22. Mounting hole. Specific embodiments
[0018] The following combines the accompanying drawings and embodiments to further describe the specific embodiments of the present utility model. The following embodiments are only used to more clearly illustrate the technical solution of the present utility model, and cannot be used to limit the protection scope of the present utility model.
[0019] As Figures 1-4 shown, the present utility model is a multi-axis power head with PU friction wheels, including a base plate 1. In the middle above the base plate 1, there is a power box 2. In the middle on one side above the power box 2, there is a motor 3. The rotating shaft of the motor 3 penetrates through the power box 2 and is fixedly connected to the driving shaft 4. On the side of the driving shaft 4 away from the motor 3 inside the power box 2, there is a first PU wheel 5. On both sides below the driving shaft 4 inside the power box 2, there are transmission shafts 6. On the transmission shafts 6, there are second PU wheels 7 that match the first PU wheel 5. On both sides below the transmission shafts 6 inside the power box 2, there are output shafts 8. On the output shafts 8, there are third PU wheels 9 that match the second PU wheels 7. The side of the output shaft 8 away from the motor 3 extends outside the power box 2. When the motor 3 is working, the motor 3 drives the driving shaft 4 and the first PU wheel 5 to rotate. Under the action of friction, the two second PU wheels 7 that are in contact with the first PU wheel 5 can drive the transmission shafts 6 to rotate. When the transmission shafts 6 rotate, under the action of friction, the two third PU wheels 9 that are in contact with the second PU wheels 7 can drive the output shafts 8 to rotate. PU has good friction coefficient and heat resistance, and can be adapted as a new option to replace the gears of a multi-axis small-torque power box, and the friction coefficient is little affected by the lubricating fluid. The first PU wheel 5, the second PU wheel 7, and the third PU wheel 9 are all friction wheels with PU strips glued on the surface.
[0020] The first PU wheel 5 is in mutual contact with the second PU wheels 7 on both sides below it, and the second PU wheels 7 are in mutual contact with the third PU wheels 9 on both sides below them. Through the mutually contacting first PU wheel 5 and second PU wheels 7, and the second PU wheels 7 and third PU wheels 9, the first PU wheel 5, the second PU wheels 7, and the third PU wheels 9 can be mutually driven under the action of friction.
[0021] Both ends of the driving shaft 4 are movably connected to the power box 2 through the rear bearing seat 10 of the main shaft and the front bearing seat 11 of the main shaft respectively. A main shaft end cover 12 is provided on one side of the front bearing seat 11 of the main shaft away from the driving shaft 4.
[0022] Both ends of the transmission shaft 6 are movably connected to the side wall of the power box 2. A transmission shaft end cover 13 is provided on one side of the power box 2 away from the motor 3 and on the side of the transmission shaft 6.
[0023] One end of the output shaft 8 close to the motor 3 is provided with an output shaft bearing seat 14. The output shaft bearing seat 14 is fixedly connected to the power box 2. A tapered roller bearing 15 is provided between the output shaft 8 and the output shaft bearing seat 14. An output shaft rear seal cover 17 is provided on one side of the tapered roller bearing 15 close to the motor 3. A shaft end seal ring 16 is provided between the output shaft rear seal cover 17 and the output shaft bearing seat 14. The shaft end seal ring 16 can seal between the output shaft rear seal cover 17 and the output shaft bearing seat 14.
[0024] One end of the output shaft 8 away from the motor 3 is movably connected to the power box 2 through a deep groove ball bearing 18. An output shaft seal flange 19 is provided on one side of the power box 2 away from the motor 3 and on the side of the deep groove ball bearing 18. An output shaft front seal cover 21 is provided on one side of the output shaft seal flange 19 away from the deep groove ball bearing 18. A shaft front seal ring 20 is provided between the output shaft front seal cover 21 and the output shaft seal flange 19. The shaft front seal ring 20 can seal between the output shaft front seal cover 21 and the output shaft seal flange 19.
[0025] A plurality of equally spaced mounting holes 22 are provided on both sides of the bottom plate 1. The multi-axis power head can be fixedly installed through the mounting holes 22.
[0026] Specifically, in the present utility model, when the motor 3 is working, the motor 3 drives the driving shaft 4 and the first PU wheel 5 to rotate. Under the action of friction, the two second PU wheels 7 in contact with the first PU wheel 5 can drive the transmission shaft 6 to rotate. When the transmission shaft 6 rotates, under the action of friction, the two third PU wheels 9 in contact with the second PU wheels 7 can drive the output shaft 8 to rotate. Thus, the four output shafts 8 can rotate simultaneously driven by the third PU wheels 9. PU has good friction coefficient and heat resistance, can be adapted as a new option to replace the gears of the power box with multi-axis and small torque, and the friction coefficient is little affected by the lubricating fluid.
[0027] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. A multi-axis power head with PU friction wheels, comprising a base plate (1), characterized in that: A power box (2) is provided in the middle of the upper part of the bottom plate (1), a motor (3) is provided in the middle of one side above the power box (2), a rotating shaft of the motor (3) passes through the power box (2) and is fixedly connected to a driving shaft (4), the driving shaft (4) is located in the power box (2) and is provided with a first PU wheel (5) on the side away from the motor (3), a transmission shaft (6) is provided on both sides below the driving shaft (4) in the power box (2), a second PU wheel (7) matching the first PU wheel (5) is provided on the transmission shaft (6), an output shaft (8) is provided on both sides below the transmission shaft (6) in the power box (2), a third PU wheel (9) matching the second PU wheel (7) is provided on the output shaft (8), and the output shaft (8) extends to the outside of the power box (2) away from the side of the motor (3).
2. A multi-axis power head with PU friction wheels according to claim 1, characterized in that: The first PU wheel (5) is in contact with the second PU wheels (7) on both sides below it, and the second PU wheel (7) is in contact with the third PU wheels (9) on both sides below it.
3. A multi-axis power head with PU friction wheels according to claim 1, characterized in that: The two ends of the driving shaft (4) are movably connected to the power box (2) through a main shaft rear bearing seat (10) and a main shaft front bearing seat (11), respectively. A main shaft end cover (12) is provided on the side of the main shaft front bearing seat (11) away from the driving shaft (4).
4. The multi-axis power head with PU friction wheels according to claim 1, characterized in that: The two ends of the transmission shaft (6) are movably connected to the side walls of the power box (2), and the power box (2) is provided with a transmission shaft end cover (13) on the side of the transmission shaft (6) away from the motor (3).
5. The multi-axis power head with PU friction wheels according to claim 1, characterized in that: An output shaft bearing seat (14) is provided at one end of the output shaft (8) close to the motor (3); the output shaft bearing seat (14) is fixedly connected to the power box (2); a tapered roller bearing (15) is provided between the output shaft (8) and the output shaft bearing seat (14); an output shaft rear sealing cover (17) is provided at one side of the tapered roller bearing (15) close to the motor (3); and a shaft tail end sealing ring (16) is provided between the output shaft rear sealing cover (17) and the output shaft bearing seat (14).
6. A multi-axis power head with PU friction wheels according to claim 5, characterized in that: The end of the output shaft (8) away from the motor (3) is movably connected to the power box (2) via a deep groove ball bearing (18); the power box (2) is provided with an output shaft sealing flange (19) located on the side of the deep groove ball bearing (18) away from the motor (3); the side of the output shaft sealing flange (19) away from the deep groove ball bearing (18) is provided with an output shaft front sealing cover (21); and a shaft front end sealing ring (20) is provided between the output shaft front sealing cover (21) and the output shaft sealing flange (19).
7. The multi-axis power head with PU friction wheels according to claim 1, characterized in that: A plurality of mounting holes (22) arranged at equal distances are provided on both sides of the bottom plate (1).