Efficient power supply structure of ultrasonic spindle and cutter handle

Abstract

The utility model relates to an efficient power supply structure of an ultrasonic spindle and a cutter handle, and relates to the field of ultrasonic spindles. According to the technical scheme, the efficient and high-protection-level power supply structure between the ultrasonic spindle and the cutter handle is provided, and the dustproof and waterproof performance of the structure is improved while normal power supply is guaranteed. Specifically, the mode of a power supply structure between the ultrasonic main shaft and the knife handle is improved, a stacking mode mainly adopted at present is optimized into an internal and external structure mode, all layers of mounting surfaces are wrapped in the main shaft shell, exposure of the mounting surfaces is reduced, and the waterproof and dustproof performance of the ultrasonic main shaft is improved. In addition, the ultrasonic spindle and the cutter handle are directly connected through the bearing and the wire, and compared with induction type power supply, the utilization efficiency of electric energy is greatly improved, and the upper limit of power is higher.

Description

Technical Field

[0001] This utility model relates to the field of ultrasonic spindle technology, and in particular to a high-efficiency power supply structure for ultrasonic spindles and tool holders. Background Technology

[0002] An ultrasonic spindle is a machining device that uses high-frequency vibrations generated by ultrasonic waves to improve traditional machining processes. It combines the characteristics of ultrasound with the function of a spindle, powering the tool holder via the spindle. A piezoelectric transducer in the tool holder converts electrical energy into mechanical energy, which is then concentrated at the tool edge. This vibration of the tool alters the stress state during machining, improving efficiency and quality. During machining with an ultrasonic spindle, the tool simultaneously rotates at high speed and vibrates at high frequency. Compared to traditional machining methods, ultrasonic spindles offer significant advantages when machining hard, brittle, and difficult-to-machine materials such as cemented carbide and ceramics, and are currently widely used in various fields.

[0003] In related technologies, patent CN110170668A discloses an ultrasonic power supply spindle, which includes a housing, a rotating shaft, a first bearing, a second bearing, and an electrical connector, with the power supply part installed in a stacked manner on the end face of the spindle; patent CN110212385A discloses an ultrasonic power supply spindle, in which the power supply unit is also connected to the spindle body in a stacked manner; while patent CN112317774B discloses a non-contact ultrasonic spindle structure.

[0004] However, although the ultrasonic spindle structure disclosed above is easy to modify, the assembly surfaces need to fit tightly to achieve the effect of waterproofing and dustproofing. Therefore, it is easy for cutting fluid to seep into the spindle in the normal use environment, leading to spindle failure or even damage. At the same time, this non-contact ultrasonic spindle structure has the problem of low efficiency in induced current transmission. Summary of the Invention

[0005] The purpose of this invention is to provide a high-efficiency power supply structure for an ultrasonic spindle and tool holder, so as to solve the problems existing in the prior art.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A high-efficiency power supply structure for an ultrasonic spindle and a tool holder, wherein the ultrasonic spindle is electrically connected to a third electrode contact and a fourth electrode contact on the tool holder via a first electrode contact and a second electrode contact, respectively, and the ultrasonic spindle comprises:

[0008] The spindle housing has a spindle axially arranged on its inner side, and the tool holder mating end is sealed between the spindle housing and the spindle by a fixed front cover and a moving front cover;

[0009] An end cap, located between the spindle housing and the mandrel, and sealed to the mandrel in a labyrinthine configuration; and

[0010] An aero-mounted plug, which is installed on the main shaft housing, includes a first electrode and a second electrode. The first electrode is electrically connected to the first electrode contact via a first bearing, and the second electrode is electrically connected to the second electrode contact via a second bearing.

[0011] The first bearing and the second bearing are both located between the spindle housing and the mandrel, and along the axial direction of the mandrel, they are located between the end cover and the fixed front cover.

[0012] In one possible implementation, the first electrode contact and the second electrode contact are disposed on the insulating gasket of the front cover.

[0013] In one possible implementation, one side of the second bearing is insulated from the end cap by a first insulating ring, and the inner ring of the second bearing is insulated from the spindle by a second insulating ring.

[0014] In one possible implementation, the outer ring of the second bearing is fitted with a second insulating cap, which insulates it from the spindle housing.

[0015] In one possible implementation, the second bearing is insulated from the first bearing by a third insulating ring.

[0016] In one possible implementation, the outer ring of the first bearing is fitted with a first insulating cover to insulate it from the spindle housing; the inner ring of the first bearing is insulated from the spindle by the moving front cover.

[0017] In one possible implementation, the first electrode is connected to a first copper contact via a wire, and the first copper contact is electrically connected to the outer ring of the first bearing.

[0018] In one possible implementation, the second electrode is connected to a second copper contact via a wire, and the second copper contact is electrically connected to the outer ring of the second bearing.

[0019] In one possible implementation, the spindle housing is further provided with an air curtain inlet, which allows airflow to pass through the first bearing and then enter the gap between the fixed front cover and the moving front cover via an air pipe connector.

[0020] In one possible implementation, the front cover is further provided with a handle catch for positioning the handle.

[0021] The beneficial effects of the technical solution provided by this utility model include at least the following:

[0022] This technical solution provides a high-efficiency, high-protection-level power supply structure between an ultrasonic spindle and a tool holder, improving its dustproof and waterproof performance while ensuring normal power supply. Specifically, this invention improves the power supply structure between the ultrasonic spindle and the tool holder, optimizing it from the currently predominantly layered method to an internal and external structure. Each layer is encased within the spindle housing, reducing exposed mounting surfaces and improving the ultrasonic spindle's dustproof and waterproof performance. Furthermore, the power supply between the ultrasonic spindle and the tool holder uses a direct connection between bearings and wires, significantly improving energy utilization efficiency and increasing the maximum power output compared to inductive power supply. Attached Figure Description

[0023] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0024] Figure 1 The diagram shows a cross-sectional view of the ultrasonic spindle and tool holder high-efficiency power supply structure provided by an exemplary embodiment of the present invention when the ultrasonic spindle is at a first angle.

[0025] Figure 2 It shows Figure 1 A magnified view of part A in the diagram.

[0026] Figure 3 This illustration shows an assembly diagram of an ultrasonic spindle and tool holder, illustrating an efficient power supply structure for an ultrasonic spindle and tool holder provided in an exemplary embodiment of the present invention.

[0027] Figure 4 The diagram shows a schematic of the tool holder, which is part of an exemplary embodiment of the present invention, providing a high-efficiency power supply structure for an ultrasonic spindle and tool holder.

[0028] Figure 5 The diagram shows a cross-sectional view of the ultrasonic spindle in a second angle, illustrating an exemplary embodiment of the present invention, of a high-efficiency power supply structure for an ultrasonic spindle and tool holder.

[0029] In the diagram: 1. Mandrel; 2. Spindle housing; 3. First insulating ring; 4. Second insulating ring; 5. Air connector; 6. Fixed front cover; 7. Third insulating ring; 8. Tool holder catch; 9. Moving front cover; 10. First insulating cover; 11. Second insulating cover; 12. End cover; 13. First electrode; 14. First copper contact; 15. First bearing; 16. Insulating gasket; 17. Second bearing; 18. Second copper contact; 19. Second electrode; 20. First electrode contact; 21. Second electrode contact; 22. Third electrode contact; 23. Fourth electrode contact; 24. Air curtain inlet. Detailed Implementation

[0030] 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.

[0031] In this specification, identical components are represented by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to directions in the accompanying drawings of this utility model, while the terms "bottom surface," "top surface," "inner," and "outer" refer to directions towards or away from a specific component, respectively. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "multiple" means two or more.

[0032] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0033] Figure 1 The diagram shows a cross-sectional view of the ultrasonic spindle in a first angle, illustrating the high-efficiency power supply structure for the ultrasonic spindle and tool holder provided in an exemplary embodiment of the present invention. Figure 2 It shows Figure 1 A magnified view of part A in the diagram. Figure 3 This illustration shows an assembly diagram of an ultrasonic spindle and tool holder, illustrating an efficient power supply structure for an ultrasonic spindle and tool holder according to an exemplary embodiment of the present invention. Figure 4This illustration shows a schematic diagram of a tool holder with an efficient power supply structure for an ultrasonic spindle and tool holder according to an exemplary embodiment of the present invention. In this efficient power supply structure, the ultrasonic spindle is electrically connected to the third electrode contact 22 and the fourth electrode contact 23 on the tool holder via a first electrode contact 20 and a second electrode contact 21, respectively. The ultrasonic spindle includes a spindle housing 2, an end cap 12, and a mounting plate 5. A spindle 1 is axially arranged on the inner side of the spindle housing 2. The tool holder mating end of the spindle housing 2 is sealed between the spindle housing 2 and the spindle 1 via a fixed front seal 6 and a moving front seal 9, preventing external factors such as cutting fluid from interfering with the working environment of the internal components. The cover 12 is located between the spindle housing 2 and the spindle 1, and is sealed to the spindle 1 in a labyrinth structure. The connector 5 is installed on the spindle housing 2. The connector 5 includes a first electrode 13 and a second electrode 19. The first electrode 13 is electrically connected to the first electrode contact 20 via the first bearing 15, and the second electrode 19 is electrically connected to the second electrode contact 21 via the second bearing 17. This design not only ensures the effective transmission of electrical energy, but also allows the electrical connection to remain stable when the spindle 1 rotates relative to the spindle housing 2. The first bearing 15 and the second bearing 17 are both located between the spindle housing 2 and the spindle 1, and are located between the end cover 12 and the fixed front cover 6 along the axial direction of the spindle 1.

[0034] Specifically, the first electrode contact 20 and the second electrode contact 21 are disposed on the insulating gasket 16 of the front cover 9.

[0035] In detail, the second bearing 17 is insulated from the end cap 12 by a first insulating ring 3 on one side, and the inner ring of the second bearing 17 is insulated from the spindle 1 by a second insulating ring 4. The outer ring of the second bearing 17 is fitted with a second insulating cover 11, which insulates it from the spindle housing 2. The second bearing 17 and the first bearing 15 are insulated from each other by a third insulating ring 7. The outer ring of the first bearing 15 is fitted with a first insulating cover 10, which insulates it from the spindle housing 2; the inner ring of the first bearing 15 is insulated from the spindle 1 by a moving front cover 9, and the moving front cover 9 is fixedly connected to the spindle 1.

[0036] As a supplementary explanation, along the axial direction of the mandrel 1, the front cover 6, the first insulating cover 10, the second insulating cover 11, and the end cover 12 are arranged in sequence to abut against each other.

[0037] In this embodiment, the spindle 1 is transitionally assembled with the first insulating ring 3 and the moving front cover 9. When the spindle 1 rotates, it drives them to rotate together, thereby causing the inner rings of the first bearing 15 and the second bearing 17 to rotate. The spindle housing 2 is transitionally assembled with the fixed front cover 6, the first insulating cover 10, the second insulating cover 11, and the end cover 12, keeping them stationary and ensuring the required airtightness and waterproof performance of the ultrasonic spindle. The spindle 1, the spindle housing 2, and the insulators that are transitionally fitted to them are separated by the first bearing 15 and the second bearing 17, ensuring smooth relative rotation. The bearings ensure electrical connection between the inner and outer rings through rolling elements, thereby realizing the electrical connection from the first electrode 13 and the second electrode 19 of the insert 5 to the first electrode contact 20 and the second electrode contact 21 on the insulating pad 16.

[0038] Furthermore, the first electrode 13 is connected to the first copper contact 14 via a wire, and the first copper contact 14 is electrically connected to the outer ring of the first bearing 15. The second electrode 19 is connected to the second copper contact 18 via a wire, and the second copper contact 18 is electrically connected to the outer ring of the second bearing 17.

[0039] It is worth mentioning that the spindle 1 and the main spindle housing 2, as well as their respective transition fit insulators, are separated by the first bearing 15 and the second bearing 17, which ensures smooth relative rotation and reliable operation of the entire structure.

[0040] Furthermore, the front cover 9 is also equipped with a handle catch 8 for positioning the handle.

[0041] In this embodiment, the tool holder catch 8 guides the tool holder to be correctly installed in the predetermined position through its precise geometric shape and size matching, and maintains a stable connection under working conditions of high-speed rotation and high-frequency vibration.

[0042] It should be noted that, Figure 5 The diagram shows a cross-sectional view of the ultrasonic spindle and tool holder high-efficiency power supply structure provided by an exemplary embodiment of the present invention when the ultrasonic spindle is at a second angle. The spindle housing 2 is also provided with an air curtain inlet 24. The air curtain inlet 24 passes through the first bearing 15 and enters the gap between the fixed front cover 6 and the moving front cover 9 through the air pipe connector.

[0043] In this embodiment, the airflow from the air pipe connector first passes through the spindle housing 2 and the second insulating cover 11 into the interior of the ultrasonic spindle, and then passes through the first bearing 15 before entering the gap between the fixed front cover 6 and the moving front cover 9, forming positive pressure to prevent liquid from entering the spindle and causing short circuits, component corrosion, and other problems.

[0044] Next, the working principle of a high-efficiency power supply structure for an ultrasonic spindle and tool holder involved in the embodiments of this utility model will be explained.

[0045] In the high-efficiency power supply structure of the ultrasonic spindle and tool holder provided in this technical solution, the tool holder is equipped with two electrode contacts (third electrode contact 22 and fourth electrode contact 23), while the ultrasonic spindle is provided with two corresponding electrode contact points (first electrode contact 20 and second electrode contact 21).

[0046] First, when the ultrasonic generator supplies power to the ultrasonic knife handle through the connector 5, current flows in from the first electrode 13 of the connector 5 and is connected to the first copper contact 14 through a wire, and then transmitted to the outer ring of the first bearing 15. The first bearing 15 achieves electrical conduction between the inner and outer rings through its internal rolling elements, and the inner ring is then connected to the first electrode contact 20 on the insulating pad 16 through a wire.

[0047] Subsequently, the current passes through the first electrode contact 20 and connects with the corresponding third electrode contact 22 on the tool holder, enters the internal circuit of the tool holder, and finally flows out through the fourth electrode contact 23 on the tool holder.

[0048] Next, the outflowing current reaches the second electrode contact 21, which is electrically connected to the inner ring of the second bearing 17 via a wire. The second bearing 17 also achieves electrical connection between the inner and outer rings through rolling elements, and its outer ring is connected to the second copper contact 18.

[0049] Finally, the second copper contact 18 transmits current to the second electrode 19 of the connector 5 via a wire, thereby forming an electrical circuit with the ultrasonic generator.

[0050] It is worth mentioning that, in order to ensure safety and insulation performance, all wires are wrapped with an insulating sheath, which effectively prevents current leakage and other potential safety hazards.

[0051] In summary, this technical solution provides a highly efficient and high-protection-level power supply structure between the ultrasonic spindle and the tool holder, improving its dustproof and waterproof performance while ensuring normal power supply. Specifically, this invention improves the power supply structure between the ultrasonic spindle and the tool holder, optimizing the currently predominantly layered approach to an internal and external structure. Each layer is encased within the spindle housing, reducing exposed mounting surfaces and enhancing the ultrasonic spindle's dustproof and waterproof performance. Furthermore, the power supply between the ultrasonic spindle and the tool holder utilizes a direct connection between bearings and wires, significantly improving energy utilization efficiency and increasing the maximum power output compared to inductive power supply.

[0052] In the embodiments disclosed in this utility model, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments disclosed in this utility model according to the specific circumstances.

[0053] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. An efficient power supply structure of an ultrasonic spindle and a tool holder, characterized in that, The ultrasonic spindle is electrically connected with the third electrode contact (22) and the fourth electrode contact (23) on the tool holder through the first electrode contact (20) and the second electrode contact (21) respectively, and the ultrasonic spindle comprises: The spindle shell (2) is provided with the mandrel (1) axially on the inner side, and the tool holder butt joint end ensures the sealing between the spindle shell (2) and the mandrel (1) through the fixed front cover (6) and the movable front cover (9); The end cover (12) is located between the spindle shell (2) and the mandrel (1) and is sealed in a labyrinth structure with the mandrel (1); and The navigation plug (5) is installed on the spindle shell (2) and comprises a first electrode (13) and a second electrode (19), the first electrode (13) is electrically connected with the first electrode contact (20) through the first bearing (15), and the second electrode (19) is electrically connected with the second electrode contact (21) through the second bearing (17); The first bearing (15) and the second bearing (17) are located between the spindle shell (2) and the mandrel (1) and are located between the end cover (12) and the fixed front cover (6) in the axial direction of the mandrel (1).

2. The high efficiency power supply structure of the ultrasonic spindle and tool holder according to claim 1, characterized in that, The first electrode contact (20) and the second electrode contact (21) are provided on the insulating pad (16) of the movable front cover (9).

3. The high efficiency power supply structure of the ultrasonic spindle and tool holder according to claim 1, characterized in that, One side of the second bearing (17) is insulated and separated from the end cover (12) through the first insulating ring (3), and the inner ring of the second bearing (17) is insulated and separated from the mandrel (1) through the second insulating ring (4).

4. The high efficiency power supply structure of the ultrasonic spindle and the tool holder according to claim 3, characterized in that, The outer ring of the second bearing (17) is matched with the second insulating cover (11) to be insulated and separated from the spindle shell (2).

5. The high efficiency power supply structure of the ultrasonic spindle and tool holder according to claim 3, characterized in that, The second bearing (17) and the first bearing (15) are insulated and separated through the third insulating ring (7).

6. The high efficiency power supply structure of the ultrasonic spindle and the tool holder according to claim 5, characterized in that, The outer ring of the first bearing (15) is matched with the first insulating cover (10) to be insulated and separated from the spindle shell (2), and the inner ring of the first bearing (15) is insulated and separated from the mandrel (1) through the movable front cover (9).

7. The high efficiency power supply structure of the ultrasonic spindle and tool holder according to claim 1, characterized in that, The first electrode (13) is connected to the first copper contact (14) through a wire, and the first copper contact (14) is electrically connected with the outer ring of the first bearing (15).

8. The high efficiency power supply structure of the ultrasonic spindle and tool holder according to claim 1, characterized in that, The second electrode (19) is connected to the second copper contact (18) through a wire, and the second copper contact (18) is electrically connected with the outer ring of the second bearing (17).

9. The high efficiency power supply structure of the ultrasonic spindle and tool holder according to claim 1, characterized in that, The spindle shell (2) is also provided with an air curtain inlet (24), and the air curtain inlet (24) is connected through an air pipe joint to make the airflow pass through the first bearing (15) and then enter the gap between the fixed front cover (6) and the movable front cover (9).

10. The high efficiency power supply structure of an ultrasonic spindle and a tool holder according to claim 1, characterized in that, The movable front cover (9) is also provided with a tool holder clamping piece (8) for positioning the tool holder.

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