Handheld ultrasonic drill

Abstract

The utility model discloses a handheld ultrasonic drill which comprises a shell, a driving unit and an ultrasonic unit which are arranged along a first direction are arranged in the shell, the driving unit is connected with the ultrasonic unit, the ultrasonic unit comprises a transducer shell and a transducer, the transducer shell comprises a first mounting section and a second mounting section which are arranged from front to back along the first direction, and the transducer shell is connected with the transducer. An inner cavity for accommodating the transducer is formed in the first mounting section; a sleeving part is arranged on one side, close to the inner cavity, of the second mounting section; the sleeving part is provided with a first groove with an opening facing the inner side wall of the shell, the electric transmission assembly is arranged in the first groove, and the electric transmission assembly is electrically connected with the transducer. According to the handheld ultrasonic drill provided by the utility model, the sleeving part is arranged, so that the transducer shell forms the first groove which is sunken inwards, the receiving unit is embedded into the first groove, and the handheld ultrasonic drill can not reduce the specification and size of the ultrasonic unit or increase the overall radial size, so that the overall assembly of the handheld ultrasonic drill is compact.

Description

Technical Field

[0001] The utility model relates to the technical field of drilling processing equipment, in particular to a handheld ultrasonic drill. Background Art

[0002] As a drilling tool, handheld ultrasonic drills are often used in the aviation industry to make holes in difficult-to-process materials such as titanium alloys, carbon fiber braided tapes, unidirectional tapes and other carbon fiber composite materials, and Kevlar bulletproof materials.

[0003] The existing handheld ultrasonic drill needs to be equipped with an electrical signal transmission structure, such as a wireless transmission receiving unit and a wireless transmission transmitting unit, on the outer peripheral side of the shell corresponding to the inner cavity where the transducer is located, which will result in a large radial space requirement for the handheld ultrasonic drill, making the overall volume of the existing handheld ultrasonic drill large and heavy. Using this type of ultrasonic drill can easily lead to tiring one-handed operation and reduced work efficiency. In addition, an auxiliary handle may be required for the operator to hold with both hands, making one-handed operation impossible.

[0004] If the diameter of the transducer housing is reduced to reduce the weight and volume of the handheld drill, the diameter of the piezoelectric material must be reduced accordingly, which will affect the performance of the handheld ultrasonic drill, such as output power. Utility Model Content

[0005] The utility model aims to provide a handheld ultrasonic drill. By optimizing the radial structure of the handheld ultrasonic drill, the weight of the handheld ultrasonic drill can meet the requirement of single-handed holding and the power requirement, so as to solve the problems that the existing handheld ultrasonic drill is large in size and heavy in weight, which easily leads to fatigue in single-handed operation, reduced work efficiency or requires the operator to hold with both hands, resulting in inconvenience in operation.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A handheld ultrasonic drill comprises a shell, wherein the shell comprises a left shell body and a right shell body, wherein the left shell body and the right shell body are spliced ​​to each other to form a cavity, wherein a driving unit and an ultrasonic unit arranged along a first direction are arranged in the cavity, and an electric transmission component is also arranged in the cavity, wherein:

[0008] The driving unit is connected to the ultrasonic unit to drive the ultrasonic unit to rotate relative to the housing, and

[0009] The ultrasonic unit comprises a transducer housing and a transducer, wherein:

[0010] The transducer housing comprises a first mounting section and a second mounting section arranged from front to rear along a first direction, wherein an inner cavity for accommodating the transducer is arranged in the first mounting section; and a sleeve portion is arranged on a side of the second mounting section close to the inner cavity; the sleeve portion is provided with a first groove opening toward the inner side wall of the housing, the electrical transmission component is built into the first groove, and the electrical transmission component is electrically connected to the transducer.

[0011] In some embodiments, the driving unit includes a fixed wall and a driving block, the driving block is rotatably connected to the interior of the fixed wall, and the front end of the driving block is provided with an output end that can rotate relative to the housing to output power; and

[0012] A deceleration unit is also connected between the driving unit and the ultrasonic unit; and the deceleration unit includes a connecting frame, a first transmission member and a second transmission member, wherein:

[0013] The connecting frame seals the front end of the driving unit, and the rear end of the connecting frame is fixedly connected to the front end of the fixed wall; the second transmission member is rotationally connected to the connecting frame, and is simultaneously transmission-connected to the first transmission member and the output end; the first transmission member is also fixedly connected to the ultrasonic unit.

[0014] In some embodiments, the reduction unit and the drive block together constitute a planetary gear structure, the first transmission member constitutes the outer ring gear of the planetary gear structure, the second transmission member constitutes the planetary gear of the planetary gear structure, and the drive block constitutes the sun gear of the planetary gear structure.

[0015] In some embodiments, taking the first direction as the axial direction of the output end, in the radial direction of the output end, the fixed wall and / or the connecting frame are fixedly connected to the inner side wall of the housing.

[0016] In some embodiments, a flange is provided on a side of the second mounting section close to the reduction unit; the first transmission member is connected to the inner circumference or the outer circumference of the flange and is fixedly connected to the flange.

[0017] In some embodiments, a first connecting hole is provided on the flange, and a second connecting hole corresponding to the first connecting hole is provided on the second transmission member, and the first connecting hole and the second connecting hole are connected to each other.

[0018] In some embodiments, the second mounting section is further provided with a third groove extending toward the front end to the interior of the sleeve portion; the front end of the connecting frame extends into the third groove and is rotatably connected to the transducer housing.

[0019] In some embodiments, the electrical transmission component is a wireless transmission component, the wireless transmission component includes a receiving unit and a transmitting unit, the receiving unit is disposed in the first groove, and,

[0020] The inner side wall of the housing is provided with a second groove arranged opposite to the first groove, and the emitting unit is installed in the second groove.

[0021] In some embodiments, a left gun handle portion is provided on the left outer shell, and a right gun handle portion is provided on the right outer shell; when the left outer shell and the right outer shell are spliced ​​with each other, the left gun handle portion and the right gun handle portion are spliced ​​with each other to form a gun handle portion for holding.

[0022] In some embodiments, the housing is provided with a first gas path connected to the drive unit; and a trigger housing and a trigger core are provided in the housing, wherein:

[0023] The trigger housing is provided with a first through hole and a second through hole which are interconnected, and the second through hole is used to introduce airflow into the first through hole;

[0024] The trigger core is arranged in the first through hole, and an air passage perpendicular to the second through hole is arranged in the trigger core, the air passage is communicated with the first air path, and the trigger core is provided with an air inlet hole communicated with the air passage, and,

[0025] The first through hole has a first position and a second position, the first position enables the air inlet to communicate with the second through hole, and the second position enables the air inlet to be isolated from the second through hole;

[0026] The trigger core is configured to be able to reciprocate between the first position and the second position in the first through hole.

[0027] In some embodiments, a trigger member capable of extending out and retracting into the housing is disposed on the housing, and the trigger member is connected to the trigger core to drive the trigger core to reciprocate between the first position and the second position.

[0028] In some embodiments, an elastic member is disposed in the airway, the elastic member extends out of the airway and abuts against the inner wall of the shell; when the trigger core is in the first position, the elastic member can squeeze the trigger core to move the trigger core toward the second position.

[0029] Compared with the prior art, the handheld ultrasonic drill implemented by the utility model has the following beneficial effects:

[0030] The handheld ultrasonic drill provided by the utility model forms a first groove that is recessed inwardly in the transducer housing through a sleeve portion disposed at the rear end of the transducer housing, and the first groove is located in the second mounting section, behind the first mounting section, and does not affect the size of the inner cavity. By having the electric transmission component built into the first groove formed by the sleeve portion, the handheld ultrasonic drill can be configured with the electric transmission component without reducing the size of the ultrasonic unit or increasing the overall radial size of the handheld ultrasonic drill, so that the overall assembly of the handheld ultrasonic drill is compact, the weight of the handheld ultrasonic drill is relatively reduced, and the handheld ultrasonic drill can be operated with one hand, thereby improving processing efficiency.

[0031] Moreover, the handheld ultrasonic drill uses a reduction unit disposed at the front end of the drive unit so that the connecting frame of the reduction unit is fixedly connected to the fixed wall of the drive unit in a first direction, and the connecting frame seals the front end of the drive unit to form an axial seal and an axial support, thereby enabling the connecting frame to serve as a radial support structure and an axial support structure of the reduction unit itself, and to serve as a seal required for the front end of the drive unit, thereby omitting the original front end seal of the drive unit, thereby reducing the axial size of the handheld ultrasonic drill and relatively further reducing the weight of the handheld ultrasonic drill. Overall, the handheld ultrasonic drill has a compact structure, light weight, and a high degree of integration, so that the handheld ultrasonic drill can be operated with one hand, thereby improving processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a schematic diagram of a handheld ultrasonic drill in an embodiment of the utility model;

[0033] Figure 2 yes Figure 1 A schematic diagram of the interior of the structure shown;

[0034] Figure 3 yes Figure 2 A partial enlarged view of middle A;

[0035] Figure 4 is a cross-sectional schematic diagram of a handheld ultrasonic drill in an embodiment of the utility model;

[0036] Figure 5 yes Figure 4 A partial enlarged view of B in the middle;

[0037] Figure 6 yes Figure 5 A partial enlarged view of middle C;

[0038] Figure 7 yes Figure 4 A partial enlarged view of D in the middle;

[0039] Figure 8 It is a schematic diagram of the cooperation between the planet carrier and the planetary gear in the embodiment of the utility model;

[0040] Fig. 9 It is a partial schematic diagram of the transducer housing in the embodiment of the utility model;

[0041] Fig.10 It is a schematic diagram of the trigger core in the second position in the embodiment of the utility model.

[0042] In the figure, 100, a handheld ultrasonic drill;

[0043] 1. Shell; 1a. Grip; 1b. Cavity; 1c. Second groove; 1d. Left shell; 10d. Left grip; 1e. Right shell; 10e. Right grip;

[0044] 2. driving unit; 2a. fixed wall; 20a. air flow inlet; 2b. driving block; 20b. output shaft;

[0045] 3. reduction unit; 3a. planet carrier; 30a. connecting shaft; 3b. ring gear; 30b. second connecting hole; 3c. planet gear;

[0046] 4, ultrasonic unit; 4a, transducer housing; 40a, inner cavity; 40b, flange; 400b, first connecting hole; 40c, sleeve portion; 400c, first groove; 40d, third groove; 40e, first mounting section; 40f, second mounting section; 4b, transducer;

[0047] 5. Wireless transmission component; 5a. Receiving unit; 50a. Receiving magnet; 5b. Transmitting unit; 50b. Transmitting magnet; 5c. Air gap;

[0048] 6. Drill chuck; 7. Drill bit; 8. First bearing; 9. Second bearing; 10. Third bearing; 11. First gap; 12. Second gap; 13. Trigger housing; 13a. First through hole; 13b. Second through hole; 13c. Air pipe connecting part; 14. Trigger core; 14a. Air passage; 14b. Air inlet hole; 15. First air path; 16. Second air path; 17. Air inlet hose; 18. Nut; 19. Trigger member; 20. Elastic member. DETAILED DESCRIPTION

[0049] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0050] In the description of the present utility model, it should be understood that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element. The terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0051] In the description of the present invention, it should be understood that the terms "height", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like used in the present invention to indicate the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0052] In the description of the present invention, it should be understood that the terms "first" and "second" are used in the present invention for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0053] Example

[0054] refer to Figure 1-Figure 10 One embodiment of the utility model provides a handheld ultrasonic drill 100, which includes a housing 1, the housing 1 having a gun handle 1a for a user to hold, and a cavity 1b formed in the housing 1. The cavity 1b is equipped with a driving unit 2, a deceleration unit 3, and an ultrasonic unit 4 arranged along a first direction, and also includes an electric transmission component, wherein the ultrasonic unit 4 includes a transducer housing 4a and a transducer 4b. In this embodiment, the cavity 1b is a columnar space extending along the length direction, so the first direction is the length direction of the cavity 1b.

[0055] The driving unit 2 is connected to the outside of the housing 1 through a gas flow channel to introduce an external gas source, so that the output end of the driving unit 2 can rotate relative to the housing 1 to output power, and transmit it to the drill chuck 6 through the reduction unit 3 and the ultrasonic unit 4. When the driving unit 2 outputs power, the drill chuck 6 rotates accordingly, thereby driving the drill bit 7 to rotate and realize the drilling action.

[0056] It is understandable that the drive unit 2, as a component providing operating power, can be an electric component or a pneumatic component. The drive unit 2 obtains operating power by introducing an external air source, which is only an example of the present invention. In other embodiments, the drive unit 2 can also obtain external electrical energy and realize power output by electric drive.

[0057] refer to Figure 1-Figure 10 , the ultrasonic unit 4 of this embodiment is arranged at the front end of the deceleration unit 3 and is coaxially connected to the deceleration unit 3. Specifically, the ultrasonic unit 4 includes a transducer housing 4a and a transducer 4b, wherein the transducer housing 4a includes a first mounting section 40e and a second mounting section 40f arranged from front to back along a first direction, and an inner cavity 40a for accommodating the transducer 4b is arranged in the first mounting section 40e. A sleeve portion 40c is arranged on one side of the second mounting section 40f close to the inner cavity, i.e., on the front end of the second mounting section 40f; the sleeve portion 40c is provided with a first groove 400c opening toward the inner side wall of the housing, and the electric transmission component is built into the first groove 400c, and the electric transmission component is electrically connected to the transducer 4b.

[0058] Specifically, the front end of the transducer 4b is connected to a horn extending out of the cavity 1b, and a drill chuck 6 and a drill bit 7 are installed at the front end of the horn. The drill chuck 6 is connected to the front end of the ultrasonic unit 4, and locks the drill bit 7, so that the drill chuck 6 can drive the drill bit 7 to rotate, so that the drill bit 7 performs a drilling operation.

[0059] The transducer 4b includes a piezoelectric vibrator and other components for converting electromagnetic energy into mechanical energy, and a horn connected to the front end thereof is used to amplify the mechanical amplitude. The transducer housing 4a is disposed in the housing 1. Generally speaking, the piezoelectric vibrator is installed in the inner cavity 40a, and the horn extends from the cavity 1b to the outside of the housing 1 and is connected to the drill chuck 6. The specific configuration of the transducer 4b can be specifically configured according to the application scenario of the handheld ultrasonic drill 100 and the target to be processed, and will not be described in detail here.

[0060] The electrical transmission component is used to receive and transmit a high-frequency alternating current signal matching the ultrasonic unit 4, which can be wired transmission or wireless transmission. In this embodiment, the electrical transmission component adopts a wireless transmission component 5, which includes a receiving unit 5a and a transmitting unit 5b. The receiving unit 5a is arranged on the outer peripheral side of the second installation section 40f of the ultrasonic unit 4, and the transmitting unit 5b is arranged on the outer peripheral side of the receiving unit 5a, and the transmitting unit 5b is arranged opposite to the receiving unit 5a; specifically,

[0061] The receiving unit 5a includes a receiving coil (not shown) and a receiving magnet 50a for receiving the magnetic field generated by the transmitting unit 5b. The receiving unit 5a is arranged on the outer peripheral side of the second mounting section 40f and is electrically connected to the transducer 4b.

[0062] The transmitting unit 5b includes a transmitting coil (not shown) and a transmitting magnet 50b that generates a magnetic field based on the current of the transmitting coil. The transmitting unit 5b is arranged on the outer peripheral side of the receiving unit 5a. The transmitting unit 5b is arranged opposite to the receiving unit 5a and an air gap 5c is formed.

[0063] It is understandable that after the transmitting unit 5b is electrically connected to the external power supply, an electromagnetic field will be generated, which in turn causes the receiving unit 5a to excite the electromagnetic field to generate electricity, causing the transducer 4b to operate. The performance and specification design of the receiving unit 5a and the transmitting unit 5b can be set according to the process parameters required by the handheld electric drill, and will not be repeated here. Of course, the receiving unit and the transmitting unit can also be relatively arranged along the first direction, that is, the transmitting unit is not arranged on the outer peripheral side of the receiving unit, but the transmitting unit and the receiving unit are arranged in sequence along the first direction.

[0064] refer to Figure 1-Figure 10 In this embodiment, the transducer housing 4a is arranged in the cavity 1b, and an inner cavity 40a is arranged in the transducer housing 4a; the transducer 4b is arranged in the inner cavity 40a, and the amplitude rod connected to the front end of the transducer 4b extends out of the front end of the housing 1.

[0065] A sleeve portion 40c is provided on one side of the second mounting section 40f close to the inner cavity 40, and the sleeve portion 40c is located behind the inner cavity 40a, and the sleeve portion 40c is provided with a first groove 400c with an opening toward the inner side wall of the housing 1, that is, the first groove 400c is recessed toward the inside of the transducer housing 4a; the receiving unit 5a is installed in the first groove 400c. In addition, the inner side wall of the housing 1 is provided with a second groove 1c recessed toward the outer side of the housing 1 in the radial direction of the cavity 1b, and the second groove 1c is arranged opposite to the first groove 400c, that is, the inner side wall of the housing 1 is provided with a second groove 1c opposite to the first groove 1c, the openings of the two grooves are arranged oppositely, and the transmitting unit 5b is installed in the second groove 1c.

[0066] It should be noted that the receiving unit 5a is installed in the first groove 400c, that is, the wireless transmission component 5 is partially built in the first groove 400c. According to the size specifications of the wireless transmission component 5, if the first groove 400c cannot accommodate the entire wireless transmission component 5, correspondingly, the inner wall of the housing 1 needs to open a second groove 1c to cooperate with the installation of the transmitting unit 5b of the wireless transmission component 5. The first groove 400c and the second groove 1c are both annular, which is also the structure illustrated in this embodiment. According to the process parameters of the wireless transmission component 5, in other embodiments, the sleeve portion 40c can also be recessed deeper toward the inside of the transducer housing 4a, so that the first groove 400c has a greater depth, which is sufficient to accommodate the entire wireless transmission component 5, or the wireless transmission component 5 itself has a smaller size, so that the entire wireless transmission component 5 is sufficient to be accommodated in the first groove 400c, and the wireless transmission component 5 can be built in the first groove 400c as a whole, or the receiving unit and the transmitting unit can be arranged from front to back along the first direction, and both are built in the first groove 400c, which is not shown separately here.

[0067] Since the sleeve portion 40c is arranged at the rear of the inner cavity 40a, not on the outer peripheral side of the inner cavity 40a corresponding to the transducer 4b, and the transducer 4b is arranged in the inner cavity 40a, the recess of the sleeve portion 40c toward the inside of the transducer housing 4a does not affect the radial dimensions of the transducer 4b and the transducer housing 4a, and the first groove 400c formed based on the recess of the sleeve portion 40c is suitable for the installation of the receiving unit 5a, avoiding the receiving unit 5a from being sleeved on the outer peripheral side of the transducer housing 4a corresponding to the inner cavity 40a, thereby expanding the radial dimension of the handheld ultrasonic drill 100.

[0068] It is understandable that the relative size of the specifications of the piezoelectric vibrator and the specifications of the receiving unit 5a may affect the ultrasonic effect. For example, when the outer diameter of the piezoelectric vibrator is much larger than the outer diameter of the receiving unit 5a, since the coil and the magnet in the receiving unit 5a have size requirements, if the radial size of the receiving unit 5a is small, in order to ensure the transmission of electrical signals, the axial size of the receiving unit 5a must be relatively large. This situation will result in a larger axial size of the handheld ultrasonic drill 100. At the same time, in order to make full use of the space of the cavity 1b, the outer diameter of the receiving unit 5a is preferably close to the outer diameter of the transducer housing 4a. Since the receiving unit 5a is installed in the first groove 400c, the outer diameter of the first groove 400c is close to the outer diameter of the transducer housing 4a.

[0069] Moreover, the receiving unit 5a is installed in the first groove 400c, which can ensure that during the rotation of the transducer housing 4a, the relative axial position and radial position of the receiving unit 5a and the transducer housing 4a will not change, thereby ensuring effective electrical connection between the receiving unit 5a and the transducer 4b.

[0070] The transmitting unit 5b installed in the second groove 1c can also limit its relative axial position and radial position with the receiving unit 5a through the second groove 1c, so that when the transducer housing 4a rotates, the relative axial position and radial position of the receiving unit 5a and the transmitting unit 5b will not change, thereby ensuring effective electrical transmission between the receiving unit 5a and the transmitting unit 5b.

[0071] Therefore, the handheld ultrasonic drill 100 of the present embodiment is equipped with a wireless transmission component 5, without reducing the radial size of the ultrasonic transducer 100, that is, without reducing the output power, so that the overall assembly of the handheld ultrasonic drill 100 is compact, the weight of the handheld ultrasonic drill 100 is relatively reduced, and the handheld ultrasonic drill 100 can be operated with one hand, thereby improving the processing efficiency.

[0072] It should be noted that the axial direction in this embodiment refers to the length direction of the cavity 1b, that is, the first direction. The radial direction in this embodiment refers to the radial direction of the cavity 1b.

[0073] In some embodiments, reference Figure 1-Figure 2 The drive unit 2 includes a fixed wall 2a and a drive block 2b, wherein the fixed wall 2a is fixedly connected to the inner wall forming the cavity 1b to form a radial support for the drive unit 2, and the front end of the fixed wall 2a is fixedly connected to the rear end of the connecting frame of the reduction unit 3 to form an axial support; the rear end of the fixed wall 2a is provided with an airflow inlet 20a to introduce the external airflow into the interior of the fixed wall 2a to drive the drive block 2b to rotate. The drive block 2b is rotationally connected to the interior of the fixed wall 2a, and the output shaft 20b at the front end of the drive block 2b is extended and arranged along the first direction, so the axial direction referred to in this embodiment is also the axial direction of the output shaft 20b. Of course, the airflow inlet 20a can also be provided on the side wall of the fixed wall 2a.

[0074] refer to Figure 2 The reduction unit 3 of this embodiment is arranged at the front end of the driving unit 2 and connected to the output shaft 20b of the driving unit 2. The reduction unit 3 includes a connecting frame, a first transmission member and a second transmission member. The connecting frame seals the front end of the driving unit 2, and the rear end of the connecting frame is fixedly connected to the front end of the fixed wall 2a; the second transmission member is rotatably connected to the connecting frame, and the second transmission member is simultaneously transmission-connected to the first transmission member and the output end, and the first transmission member is also fixedly connected to the ultrasonic unit 4. Specifically, refer to Figures 2 to 5As an example of the present invention, the reduction unit 3 and the driving block together constitute a planetary gear structure, which includes a planetary carrier 3a as a connecting frame, a ring gear 3b constituting a first transmission member of the planetary gear structure, and a second transmission member constituting a planetary gear 3c of the planetary gear structure, and the driving block 2b constitutes a sun gear of the planetary gear structure, and a gear is sleeved at the front end of the output shaft 20b as an output end, thereby constituting a sun gear of the planetary gear structure, wherein,

[0075] The rear end of the planet carrier 3a is arranged in the radial direction of the output shaft 20b of the drive unit 2 and is fixedly connected to the inner wall forming the cavity 1b to form a radial support, that is, the planet carrier 3a is fixed relative to the housing 1;

[0076] Moreover, the planetary carrier 3a is axially aligned with the output shaft 20b of the drive unit 2, i.e., in the first direction, the output shaft 20b of the drive block 2b extends into the planetary carrier 3a and is rotationally connected to the planetary carrier 3a; the planetary carrier 3a seals the front end of the drive unit 2, and the rear end of the planetary carrier 3a is fixedly connected to the front end of the fixed wall 2a, forming a seal and axial support for the front end of the drive unit 2.

[0077] The planetary gear 3c is rotationally connected to the planetary carrier 3a, and is transmission-connected to the ring gear 3b and the output shaft 20b. The planetary gear 3c is simultaneously meshed with the sun gear and the ring gear 3b for transmission. The ring gear 3b, the planetary gear 3c and the gears of the sun gear are rotationally connected to the planetary carrier 3a. The ring gear 3b and the planetary gear 3b receive power output by the sun gear formed by the driving block 2b and can rotate relative to the housing 1. In addition, the ring gear 3b is also fixedly connected to the rear end of the ultrasonic unit 4 to drive the ultrasonic unit 4 to rotate.

[0078] Since the rear end of the planet carrier 3a is fixedly connected to the front end of the fixed wall 2a, the planet carrier 3a and / or the fixed wall 2a are fixedly installed on the inner wall of the housing 1 to achieve radial support.

[0079] It is understandable that the operating principle of the drive unit is to introduce external airflow from the air inlet, and the external airflow will flow along the radial and axial directions of the drive block 2b, and push the drive block 2b to rotate, and finally flow to the exhaust holes on the outer peripheral side of the drive unit 2, that is, the exhaust holes on the outer peripheral side of the fixed wall 2a. Specifically, the blades of the drive block 2b divide the space surrounded by the fixed wall 2a into multiple compartments, and the compressed airflow can make the blades and rotor of the drive block 2b rotate continuously in the closed compartments, that is, output power. If the compartments are not closed, the airflow will be mixed in each compartment, thereby affecting the continuous rotation of the blades. Therefore, in order to prevent the gas from mixing between the compartments of the drive unit 2, affecting the power output of the drive unit 2, or leaking from the drive unit 2, the front and rear ends of the drive unit 2 are provided with sealing structures. The handheld ultrasonic drill 100 of this embodiment is provided with a planetary carrier 3a on the output shaft 20b side of the driving unit 2. The planetary carrier 3a seals the front end of the driving unit 2, and the planetary carrier 3a is directly fixedly connected to the front end of the fixed wall 2a, that is, the planetary carrier 3a replaces the front end seal of the driving unit 2, and the rear end of the planetary carrier 3a is arranged adjacent to the front end of the driving block 2b. The airflow in the driving unit 2 cannot flow from the connection position between the planetary carrier 3a and the fixed wall 2a to the reduction unit 3, and the rear end of the planetary carrier 3a fits with the front end of the driving block 2b or forms a very small gap 21. In this way, the front end of the driving block 2b and the rear end of the planetary carrier 3a are friction-free, and the resistance of the airflow passing through the gap is large. The airflow is basically discharged from the exhaust hole on the outer peripheral side of the driving unit 2, and will not be mixed in each compartment, nor will it accumulate between the front end of the driving block 2b and the rear end of the planetary carrier 3a. Thus, the front end of the driving unit 2 is sealed, ensuring that the driving block 2b can rotate stably. Therefore, the planetary frame 3a can play a sealing role for the drive unit 2, that is, the original front end seal of the drive unit is omitted, so that the axial size of the handheld ultrasonic drill 100 is relatively reduced. In this application, the rear end sealing structure of the drive unit 2 is the same as that in the prior art, and will not be expanded here. In addition, the planetary frame 3a is fixedly connected to the front end of the fixed wall 2a to form an axial support. Combined with the radial support formed by the fixed connection between the planetary frame 3a and the inner wall forming the cavity 1b, it can provide axial and radial bidirectional fixation and support for the drive unit 2 and the reduction unit 3, so that the handheld ultrasonic drill 100 does not need to set too many support structures and fixed structures, making the handheld ultrasonic drill 100 compact. In addition, the number of seals is reduced, and the one-time assembly process is also reduced, simplifying the assembly process of the handheld ultrasonic drill 100.

[0080] In some embodiments, reference Figure 2-Figure 6A first bearing 8 is arranged at the rear end of the planet carrier 3a, the output shaft 20b of the drive unit 2 is passed through the inner ring of the first bearing 8, and the planet carrier 3a is connected to the outer peripheral side of the outer ring of the first bearing 8. This is an example of the planet carrier 3a providing radial support for the output shaft 20b of the drive unit 2, so that the output shaft 20b of the drive unit 2 is positioned in the radial direction. Moreover, the output shaft 20b of the drive unit 2 is connected to the planet carrier 3a through the first bearing 8, which can ensure that when the drive unit 2 outputs power through the output shaft 20b, the planet carrier 3a remains fixed, ensuring the stability of the radial structure of the handheld ultrasonic drill 100. At the same time, the first bearing 8 also plays a role in sealing the drive unit 2 and the reduction unit 3, so that when the drive unit 2 is pneumatically driven, the external airflow cannot flow to the reduction unit 3.

[0081] The number of the planetary gears 3c can be three or more, and the plurality of planetary gears 3c can be evenly arranged around the sun gear formed by the drive block 2b. Furthermore, by setting the gear ratio of the sun gear, the planetary gears 3c and the ring gear 3b, the reduction unit 3 can adjust the rotation speed of the output shaft 20b of the drive unit 2 to a desired value, so that the ultrasonic unit 4 can drive the drill chuck 6 and the drill bit 7 to rotate at a desired rotation speed and output a desired torque.

[0082] In some embodiments, reference Figure 2-Figure 5 The ring gear 3b is arranged on the outer peripheral side of the front end of the planet carrier 3a, and a first gap 11 is provided between the ring gear 3b and the inner wall forming the cavity 1b, so that when the ring gear 3b rotates relative to the housing 1, there is no friction between the ring gear 3b and the inner wall forming the cavity 1b, thereby ensuring that the ring gear 3b can rotate smoothly and can better transmit the power output by the driving unit 2 to the ultrasonic unit 4.

[0083] In some embodiments, reference Figure 2-Figure 5, the front end of the planet carrier 3a is provided with a second bearing 9, specifically, the front end of the planet carrier 3a is provided with a connecting shaft 30a extending toward the front end, the connecting shaft 30a is passed through the inner ring of the second bearing 9, and the ultrasonic unit 4 is connected to the outer peripheral side of the outer ring of the second bearing 9. By providing the second bearing 9, the planet carrier 3a can provide axial fixation and radial support for the ultrasonic unit 4, so that in the axial rotating body formed by the rotating part of the driving unit 2, the rotating part of the reduction unit 3 and the rotating part of the ultrasonic unit 4 (the rotating part of the driving unit 2 is the driving block, and the rotating part of the reduction unit 3 is the ring gear 3b and the transmission gear 3c), the rear end thereof has the axial fixation formed by the cooperation of the fixed wall 2a and the planet carrier 3a, the radial support formed by the fixed connection between the planet carrier 3a and the housing 1, and the radial support and axial fixation formed by the cooperation of the planet carrier 3a, the second bearing 9 and the transducer housing 4a in the middle of the axial rotating body, so that the axial rotating body formed by the rotating part of the driving unit 2 and the reduction unit 3 and the ultrasonic unit 4 has a compact and stable structure. Moreover, the outer wall of the driving unit 2 and the planetary carrier 3a of the reduction unit 3 are fixedly mounted on the inner wall of the housing 1, so that the entire handheld ultrasonic drill 100 can be compact and stable. In addition, the connecting shaft 30a can be coaxially arranged with the output shaft 20b of the driving unit 2, so that the driving unit 2 and the rotating unit of the reduction unit 3 can coaxially output power, so that the ultrasonic unit 4 and the drill chuck 6 can rotate smoothly.

[0084] It is understandable that the second bearing 9 can realize positioning and support in two vertical directions, and can bear both radial load and axial load. In this way, the handheld ultrasonic drill 100 can limit the axial position and radial position of the ultrasonic unit 4 only by the second bearing 9, further making the structure of the handheld ultrasonic drill 100 compact. As an example of the present invention, the second bearing 9 can select a thrust combined needle roller bearing.

[0085] In this embodiment, the outer contour of the transducer housing 4a is a cylindrical structure, and a second gap 12 is provided between the outer peripheral side of the transducer housing 4a and the outer shell 1. The size of the second gap 12 can be the same as that of the first gap 11, so that the transducer housing 4a can rotate smoothly relative to the outer shell 1 under the drive of the reduction unit 3.

[0086] In some embodiments, reference Figure 2-Figure 10The front end of the first mounting section 40e is provided with a third bearing 10, and the third bearing 10 is connected to the inside of the housing 1 to form a radial support for the front end of the transducer housing 4a; the first mounting section 40e of the transducer housing 4a is arranged in the inner ring of the third bearing 10, and is rotatably connected to the housing 1 through the third bearing 10. By providing the third bearing 10, in the axial rotating body formed by the rotating part of the driving unit 2, the rotating part of the reduction unit 3 and the rotating part of the ultrasonic unit 4, in addition to the rear end and the middle part, the front end of the axial rotating body also has radial support, ensuring the structural stability of the axial rotating body in the radial direction, and by arranging radial supports at the front end, the middle part and the rear end of the axial rotating body, it can be ensured that the axial rotating body has no vibration in the radial direction during the operation of the handheld ultrasonic drill 100, avoiding the influence of radial vibration of the axial rotating body on the ultrasonic processing of the drill bit 7.

[0087] In some embodiments, reference Figure 2-Figure 10 A flange 40b is provided on one side of the second mounting section 40f close to the reduction unit 3, and the ring gear 3b constituting the first transmission member is sleeved on the outer side of the flange and fixedly connected to the flange 40b; the flange 40b extends along the first direction toward the reduction unit 3 and extends to the inside of the ring gear 3b, and the flange 40b is provided with a first connection hole 400b arranged along the radial direction of the cavity 1b, and the ring gear 3b is provided with a second connection hole 30b corresponding to the first connection hole 400b, and the first connection hole 400b and the second connection hole 30b are connected to each other. By inserting fasteners (not shown in the figure) into the first connection hole 400b and the second connection hole 30b, the transducer housing 4a can be fixedly connected to the ring gear 3b to achieve force transmission. Of course, the flange can also be sleeved on the outer side of the ring gear of the first transmission and fixedly connected thereto.

[0088] It is understandable that the number of the first connection hole 400b and the second connection hole 30b can be multiple, and the multiple first connection holes 400b and the second connection holes 30b are evenly arranged on the second mounting section 40f of the transducer housing 4a and the peripheral side of the gear ring 3b. The multiple first connection holes 400b and the multiple second connection holes 30b cooperate with each other, which can make the force transmission between the transducer housing 4a and the gear ring 3b more uniform. Moreover, when the drill bit 7 performs the drilling work, the drill bit 7 will bear a large circumferential reaction force, so that the connection position of the transducer housing 4a and the gear ring 3b will bear a certain circumferential shear force. Through the cooperation of the multiple first connection holes 400b and the multiple second connection holes 30b, multiple fasteners are arranged between the transducer housing 4a and the gear ring 3b. In this way, the multiple fasteners can disperse the circumferential shear force, avoid stress concentration at some positions of the transducer housing 4a and the gear ring 3b, and cause the connection structure to be cut off.

[0089] Furthermore, the flange 40b is sleeved with the gear ring 3b, that is, the transducer housing 4a partially extends into the interior of the gear ring 3b and is connected and fixed to the gear ring 3b, thereby reducing the axial length of the transducer housing 4a and the gear ring 3b without increasing the radial length of the transducer housing 4a and the gear ring 3b, thereby further reducing the axial size of the handheld ultrasonic drill 100 and maintaining the radial size without expanding.

[0090] In some embodiments, reference Figure 2-Figure 10 The second mounting section 40f is provided with a third groove 40d extending toward the front end, and the third groove 40d passes through the flange 40b and extends into the sleeve portion 40c; the connecting shaft 30a at the front end of the reduction unit 3 is passed through the third groove 40d and is rotatably connected to the transducer housing 4a.

[0091] It can be understood that, by providing a third groove 40d extending toward the front end in the second mounting section 40f of the transducer housing 4a, the reduction unit 3, especially the connecting shaft 30a of the planetary carrier 3a, can be inserted into the third groove 40d, and the front end of the second mounting section 40f is provided with a first groove 400c for installing the receiving unit 5a, and the connecting portion of the planetary carrier 3a and the transducer housing 4a and the wireless transmission component 5 occupy different radial positions of the same axial space in the cavity 1b (that is, the axial size and radial size are basically not increased), and the two do not affect each other, combined with the sealed connection between the planetary carrier 3a and the fixed wall 2a (omitting the drive unit 2, relatively reducing the axial size), and the embedded connection between the transducer housing 4a and the gear ring 3b (the embedded connection is also in a different radial position in the same axial space as the connection between the planet carrier 3a and the transducer housing 4a, so the axial size is not increased), so that the reasonable arrangement of the interior of the handheld ultrasonic drill 100 is completed without basically increasing the axial and radial sizes, or relatively reducing the axial size, and without affecting the output power, thereby avoiding the increase in weight and forward shifting of the center of gravity of the handheld ultrasonic drill 100, so that the handheld ultrasonic drill 100 has the ability to be held and operated by one hand, and the work efficiency is guaranteed.

[0092] Moreover, the connecting shaft 30a of the planetary carrier 3a is inserted into the third groove 40d, so that the connecting shaft 30a and the second bearing 9 installed on the connecting shaft 30a are both wrapped by the transducer housing 4a, and the transducer housing 4a is sleeved on the outer peripheral side of the second bearing 9, so that the transducer housing 4a can cooperate with the second bearing to limit the radial runout of the connecting shaft 30a, thereby ensuring that the radial connection between the reduction unit 3 and the ultrasonic unit 4 is stable during the drilling operation of the handheld ultrasonic drill 100.

[0093] In some embodiments, reference Figure 1-Figure 2The housing 1 includes a left housing 1d and a right housing 1e, wherein the left housing 1d and the right housing 1e are two half-shells with similar internal structures, and the left housing 1d and the right housing 1e are spliced ​​together to form a cavity 1b for installing the drive unit 2, the deceleration unit 3, the ultrasonic unit 4 and the wireless transmission component 5. In addition, a left gun handle portion 10d is provided on the left housing 1d, and a right gun handle portion 10e is provided on the right housing 1e; when the left housing 1d and the right housing 1e are spliced ​​together, the left gun handle portion 10d and the right gun handle portion 10e are spliced ​​together to form a gun handle portion 1a for holding.

[0094] The housing 1 of the handheld ultrasonic drill 100 is formed by two half shells, so that the left housing 1d and the right housing 1e can be more easily processed in internal structure than an integrated structure, and the ribs, air-avoiding structures, and channel structures inside the left housing 1d and the right housing 1e can be easily adjusted, so that the housing 1 is lighter, thereby reducing the weight of the handheld ultrasonic drill 100. Moreover, the gun handle portion 1a of the housing 1 is formed by splicing the left housing 1d and the right housing 1e, and the gun handle portion 1a and the housing 1 have good connection integrity, which is conducive to holding the handheld ultrasonic drill 100 with one hand for operation.

[0095] Based on the pneumatically driven structure of the driving unit 2 of this embodiment, the housing 1 of this embodiment may be provided with a first air path 15 connected to the driving unit 2 to input airflow so that the output end of the driving unit 2 rotates relative to the housing 1. The driving unit 2 can adjust the speed of the driving unit 2 by adjusting the amount of air introduced. Figure 1-Figure 10 A trigger housing 13 and a trigger core 14 are provided in the housing 1, wherein:

[0096] The trigger housing 13 is provided with a first through hole 13a and a second through hole 13b which are interconnected, and the second through hole 13b is used to introduce airflow into the first through hole 13a;

[0097] The trigger core 14 is disposed in the first through hole 13a and can reciprocate between the first position and the second position in the first through hole 13a. In addition, an air passage 14a perpendicular to the second through hole 13b is disposed in the trigger core 14. The air passage 14a is connected to the first air path 15, and the trigger core 14 is provided with an air inlet hole 14b connected to the air passage 14a.

[0098] The first through hole 13a has a first position and a second position, wherein the first position enables the air inlet 14b to communicate with the second through hole 13b, and the second position enables the air inlet 14b to be isolated from the second through hole 13b, and,

[0099] When the trigger core 14 is in the first position, the air inlet 14b is connected to the second through hole 13b, so that the air passage 14a is connected to the second through hole 13b, forming a second air path 16;

[0100] When the trigger core 14 is in the second position, the air inlet hole 14b is isolated from the second through hole 13b, so that the air passage 14a is not connected to the second through hole 13b.

[0101] refer to Figure 4 , Figure 7 The first through hole 13a and the second through hole 13b are perpendicular to each other. When the trigger core 14 moves to the position shown in the figure, the air inlet hole 14b is completely connected with the second through hole 13b. At this time, the trigger core 14 is in the first position, the second through hole 13b, the air inlet hole 14b, and the air channel 14a are connected to form a second air path 16, and based on the port where the air channel 14a is connected to the first air path 15, the external air flow flows along the second air path 16 → the first air path 15 → the drive unit 2, providing operating power for the drive unit 2.

[0102] refer to Fig.10 When the trigger core 14 moves to the position shown in the figure, the air inlet 14b is isolated from the second through hole 13b, and the port of the second through hole 13b is closed by the trigger core 14. At this time, the trigger core 14 is in the second position, and the airway 14a is not connected to the second through hole 13b.

[0103] It is understandable that the distance that the trigger core 14 reciprocates in the first through hole 13a along the length direction of the first through hole 13a is not limited to the distance between the first position and the second position. The first position and the second position are only used to describe the optional positions that can achieve the connection and disconnection of the second gas path 16 during the movement of the trigger core 14 in the first through hole 13a.

[0104] The external airflow is introduced from the second through hole 13b of the trigger housing 13. As an example of the present invention, the trigger housing 13 may be provided with an air pipe connection portion 13c at the hole wall of the second through hole 13b to install an air intake hose 17. The use of the air intake hose 17 can reduce the pipeline design of the housing 1, thereby reducing the weight of the handheld ultrasonic drill 100. The outer peripheral side of the trigger housing 13 may be provided with a thread, and the nut 18 may be screwed together to lock the air intake hose 17 at the hole wall of the second through hole 13b. The external airflow passes into the second through hole 13b through the air intake hose 17, and when the trigger core 14 is in the first position, the second air path 16 formed based on the connection between the airway 14a and the second through hole 13b flows to the first air path 15 and enters the drive unit 2.

[0105] As another example of the present invention, a third air path (not shown here) may also be provided in the housing 1 to introduce external airflow into the drive unit 2. In this case, the trigger housing 13 does not need to be screwed and locked with the matching nut 18, and the trigger housing 13 may only be a structure with a cylindrical outer contour, and the external airflow introduced by the third air path is delivered to the trigger core 14 through the second through hole 13b provided therein.

[0106] In some embodiments, reference Figure 1-Figure 4 , Fig.10 The housing 1 is provided with a trigger member 19 which can be extended and retracted into the housing 1 . The trigger member 19 is connected to the trigger core 14 to drive the trigger core 14 to reciprocate between the first position and the second position.

[0107] By pushing the trigger core 14 to move through the trigger member 19, the user can conveniently adjust the amount of external air introduced.

[0108] refer to Figure 4 When the trigger member 19 pushes the trigger core 14 to move to the left, the trigger core 14 will gradually move from the second position to the first position as the trigger member 19 pushes. In this process, the air inlet 14b will gradually switch from being isolated from the second through hole 13b to being partially connected to the second through hole 13b. When the air inlet 14b is partially connected to the second through hole 13b, the air inlet 14b, the second through hole 13b, and the air passage 14a form the second air path 16, and the external airflow can then flow along the second air path 16 → the first air path 15 → the drive unit 2, and enter the interior of the drive unit 2.

[0109] As the trigger member 19 is further pushed, the communicating area between the air inlet 14b and the second through hole 13b will further expand until the trigger core 14 is pushed to the first position by the trigger member 19. At this time, the air inlet 14b is completely connected with the second through hole 13b, and the communicating area between the air inlet 14b and the second through hole 13b reaches the maximum value, and the air intake volume of the external airflow also reaches the maximum value. Therefore, by moving the trigger member 19, the handheld ultrasonic drill 100 can realize continuous adjustment of the air intake volume of the external airflow, and achieve the purpose of continuously adjusting the rotation speed of the driving unit 2.

[0110] It can be understood that in the process of external airflow flowing along the second air path 16 → the first air path 15 → the drive unit 2, the external airflow in the second air path 16 enters the airway 14a from the second through hole 13b through the air inlet hole 14b, and the air inlet direction of the external airflow is perpendicular to the moving direction of the trigger core 14. In this way, it can be ensured that when the air intake amount of the external airflow is adjusted, the airflow pressure will not exert a force on the trigger core 14 to make the trigger core 14 return to the second position, so that the user does not need to overcome the resistance of the external airflow when pulling the trigger member 19. Moreover, the air intake direction of the external airflow is perpendicular to the moving direction of the trigger core 14. It can be ensured that when the external airflow enters the first air path 15, the pressure on the trigger member 19 will not drop suddenly, causing the drill bit 7 to vibrate or shake, thereby causing the precision of the machining to decrease or damaging the machined parts.

[0111] In some embodiments, reference Figure 4 , Figure 7 , Fig.10 An elastic member 20 is disposed in the housing 1, one end of the elastic member 20 is disposed in the air passage 14a and abuts against the end of the air passage 14a, and the other end of the elastic member 20 extends out of the air passage 14a and abuts against the inner side wall of the housing 1, or is fixed to the inner side wall of the housing 1, so that when the trigger core 14 moves toward the first position, the elastic member 20 can squeeze the trigger core 14 and exert a force on the trigger core 14 to move toward the second position. In this way, after the user releases the trigger member 19, the elastic member 20 can drive the trigger core 14 to move toward the second position, so that the trigger core 14 automatically resets to the second position, thereby isolating the connection between the air passage 14a and the second through hole 13b.

[0112] In summary, the embodiment of the utility model provides a handheld ultrasonic drill 100, which is provided with a sleeve portion 40c at the front end of the second mounting section 40f of the transducer housing 4a, and is recessed inward to form a first groove 400c, and the first groove 400c is located at the rear of the inner cavity 40a, and does not affect the size of the inner cavity 40a. By embedding the receiving unit 5a of the wireless transmission component 5 in the first groove 400c formed by the sleeve portion 40c, the handheld ultrasonic drill 100 can be configured with the wireless transmission component 5 without reducing the size of the ultrasonic unit 4 or increasing the overall radial size of the handheld ultrasonic drill 100, so that the handheld ultrasonic drill 100 is assembled compactly as a whole. Moreover, the handheld ultrasonic drill 100 seals the front end of the driving unit 2 through the reduction unit 3 disposed at the front end of the driving unit 2, and the planetary carrier 3a is fixedly connected to the fixed wall 2a of the driving unit 2 in the axial direction of the output end of the driving unit 2, that is, the rear end of the planetary carrier 3a is disposed adjacent to the front end of the driving block 2b, forming an axial seal and an axial support, thereby enabling the planetary carrier 3a to serve as a radial support structure and an axial support structure of the reduction unit 3 itself, and to serve as a seal required for the front end of the driving unit 2, omitting the original front end seal of the driving unit 2, thereby reducing the axial size of the handheld ultrasonic drill 100, reducing the weight of the handheld ultrasonic drill 100, and reducing the assembly process of the handheld ultrasonic drill 100 for assembling the seal, simplifying the assembly process of the handheld ultrasonic drill 100, and comprehensively making the handheld ultrasonic drill 100 compact in structure, light in weight, and highly integrated, so that the handheld ultrasonic drill 100 can be operated with one hand, thereby improving processing efficiency.

[0113] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A handheld ultrasonic drill, characterized in that: The invention comprises a shell, wherein the shell comprises a left shell body and a right shell body, wherein the left shell body and the right shell body are spliced ​​with each other to form a cavity, wherein a driving unit and an ultrasonic unit arranged along a first direction are arranged in the cavity, and an electric transmission component is also arranged in the cavity, wherein: The driving unit is connected to the ultrasonic unit to drive the ultrasonic unit to rotate relative to the housing, and The ultrasonic unit comprises a transducer housing and a transducer, wherein: The transducer housing comprises a first mounting section and a second mounting section arranged from front to rear along a first direction, wherein an inner cavity for accommodating the transducer is arranged in the first mounting section; and a sleeve portion is arranged on a side of the second mounting section close to the inner cavity; the sleeve portion is provided with a first groove opening toward the inner side wall of the housing, the electrical transmission component is built into the first groove, and the electrical transmission component is electrically connected to the transducer.

2. The handheld ultrasonic drill according to claim 1, characterized in that: The driving unit includes a fixed wall and a driving block, wherein the driving block is rotatably connected to the interior of the fixed wall, and a front end of the driving block is provided with an output end that can rotate relative to the housing to output power; and A deceleration unit is also connected between the driving unit and the ultrasonic unit; and the deceleration unit includes a connecting frame, a first transmission member and a second transmission member, wherein: The connecting frame seals the front end of the driving unit, and the rear end of the connecting frame is fixedly connected to the front end of the fixed wall; the second transmission member is rotationally connected to the connecting frame, and is simultaneously transmission-connected to the first transmission member and the output end; the first transmission member is also fixedly connected to the ultrasonic unit.

3. The handheld ultrasonic drill according to claim 2, characterized in that: The reduction unit and the driving block together constitute a planetary gear structure, the first transmission member constitutes an outer ring gear of the planetary gear structure, the second transmission member constitutes a planetary gear of the planetary gear structure, and the driving block constitutes a sun gear of the planetary gear structure.

4. The handheld ultrasonic drill according to claim 2, characterized in that: With the first direction being the axial direction of the output end, in the radial direction of the output end, the fixed wall and / or the connecting frame are fixedly connected to the inner side wall of the outer shell.

5. The handheld ultrasonic drill according to claim 2, characterized in that: A flange is provided on one side of the second mounting section close to the reduction unit; the first transmission member is connected to the inner circumference or the outer circumference of the flange and is fixedly connected to the flange.

6. The handheld ultrasonic drill according to claim 5, characterized in that: The flange is provided with a first connecting hole, the second transmission member is provided with a second connecting hole corresponding to the first connecting hole, and the first connecting hole and the second connecting hole are connected to each other.

7. The handheld ultrasonic drill according to claim 2, characterized in that: The second mounting section is further provided with a third groove extending toward the front end to the interior of the sleeve portion; the front end of the connecting frame extends into the third groove and is rotatably connected to the transducer housing.

8. The handheld ultrasonic drill according to claim 1, characterized in that: The electrical transmission component is a wireless transmission component, and the wireless transmission component includes a receiving unit and a transmitting unit, and the receiving unit is arranged in the first groove, and The inner side wall of the housing is provided with a second groove arranged opposite to the first groove, and the emitting unit is installed in the second groove.

9. The handheld ultrasonic drill according to claim 1, characterized in that: The left outer shell is provided with a left gun handle portion, and the right outer shell is provided with a right gun handle portion; when the left outer shell and the right outer shell are spliced ​​with each other, the left gun handle portion and the right gun handle portion are spliced ​​with each other to form a gun handle portion for holding.

10. The handheld ultrasonic drill according to claim 1, characterized in that: The housing is provided with a first gas path connected to the drive unit; and a trigger housing and a trigger core are provided in the housing, wherein: The trigger housing is provided with a first through hole and a second through hole which are interconnected, and the second through hole is used to introduce airflow into the first through hole; The trigger core is arranged in the first through hole, and an air passage perpendicular to the second through hole is arranged in the trigger core, the air passage is communicated with the first air path, and the trigger core is provided with an air inlet hole communicated with the air passage, and, The first through hole has a first position and a second position, the first position enables the air inlet to communicate with the second through hole, and the second position enables the air inlet to be isolated from the second through hole; The trigger core is configured to be able to reciprocate between the first position and the second position in the first through hole.

11. The handheld ultrasonic drill according to claim 10, characterized in that: The housing is provided with a trigger member capable of extending out and retracting into the housing, and the trigger member is connected to the trigger core to drive the trigger core to reciprocate between the first position and the second position.

12. The handheld ultrasonic drill according to claim 11, characterized in that: An elastic member is arranged in the air passage, and the elastic member extends out of the air passage and abuts against the inner wall of the shell; when the trigger core is located at the first position, the elastic member can squeeze the trigger core to move the trigger core toward the second position.

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