Handheld ultrasonic drill

Abstract

The invention discloses a handheld ultrasonic drill, and relates to the technical field of drilling machining equipment, the handheld ultrasonic drill comprises a shell, a containing cavity with an opening facing the front side is formed in the shell, and a driving unit and an ultrasonic transducer assembly which are sequentially arranged from the rear side to the front side are arranged in the containing cavity; moreover, the shell is provided with a handle, the gravity center of the handheld ultrasonic drill is located in a projection cylinder of the handle, and the projection cylinder is a cylinder formed by extending the horizontal projection of the handle in the vertical direction. According to the handheld ultrasonic drill provided by the invention, the gravity center of the handheld ultrasonic drill is arranged in the projection column body of the handle, so that the torque between the gravity of the handheld ultrasonic drill and the holding position of a user is greatly reduced, the situation that the wrist is twisted when the user holds the ultrasonic drill by a single hand is avoided, and the handheld ultrasonic drill can be held by the single hand; the problem that an existing handheld ultrasonic drill is prone to causing fatigue of single-hand operation is solved.

Description

Technical Field

[0001] The invention 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 carbon fiber composite materials such as carbon fiber woven tapes, unidirectional tapes, and Kevlar bulletproof materials.

[0003] The existing handheld ultrasonic drills usually have ultrasonic transducers and horns disposed at the front end of the handheld ultrasonic drills. Compared with ordinary handheld pneumatic drills, the axial length of this type of handheld ultrasonic drills is longer, which makes the overall volume of the existing handheld ultrasonic drills large and heavy. Using this type of ultrasonic drills can easily lead to fatigue in single-handed operation and reduced work efficiency. Moreover, the center of gravity of this type of handheld ultrasonic drills is moved forward, and auxiliary handles are often required for the operator to hold with both hands, which is very inconvenient to operate. Summary of the invention

[0004] The object of the present invention is to provide a handheld ultrasonic drill, which optimizes the structure of the handheld ultrasonic drill so that the center of gravity of the handheld ultrasonic drill matches the position of the handle, thereby realizing one-handed holding of the handheld ultrasonic drill and solving the problem that the existing handheld ultrasonic drill easily causes fatigue in one-handed operation.

[0005] In order to achieve the above object, the present invention adopts the following technical solution:

[0006] A handheld ultrasonic drill comprises a housing, wherein a receiving cavity is arranged in the housing, wherein a driving unit and an ultrasonic transducer assembly are arranged in the receiving cavity and are connected in sequence from the rear side to the front side; and

[0007] The housing is provided with a handle, and the center of gravity of the handheld ultrasonic drill is located in a projection column of the handle, and the projection column is a column formed by the horizontal projection of the handle extending in the vertical direction.

[0008] In some embodiments, the center of gravity of the handheld ultrasonic drill is disposed within the handle.

[0009] In some embodiments, the handle includes a connecting portion for connecting to the housing, a front end of the connecting portion extends to below the ultrasonic transducer assembly, and a rear end of the connecting portion extends to below the driving unit.

[0010] In some embodiments, the driving unit includes a deceleration assembly and a driving assembly connected in sequence from front to back, a cavity is provided between the driving assembly and the side wall of the accommodating cavity, and,

[0011] The handle is provided with a first air inlet channel and a first air outlet channel arranged at intervals, and the shell is provided with a second air inlet channel and a second air outlet channel, the second air inlet channel and the second air outlet channel are arranged at intervals relative to the accommodating cavity, and the first air inlet channel, the second air inlet channel, the cavity, the second air outlet channel, and the first air outlet channel are connected in sequence.

[0012] In some embodiments, the first air intake passage extends below the deceleration assembly and communicates with the second air intake passage; and / or,

[0013] The first air outlet passage extends to below the deceleration assembly and communicates with the second air outlet passage; and / or,

[0014] The second air intake passage extends to the reduction assembly side and communicates with the first air intake passage; and / or,

[0015] The second air outlet passage extends to the speed reduction assembly side and is communicated with the first air outlet passage.

[0016] In some embodiments, a third air outlet channel is disposed in the housing, and the third air outlet channel is arranged around the deceleration component and connects the first air outlet channel with the second air outlet channel.

[0017] In some embodiments, the second air inlet channel is disposed below the driving unit, and the second air outlet channel is disposed above the driving unit.

[0018] In some embodiments, an electric transmission assembly arranged around the ultrasonic transducer assembly is further installed in the accommodating cavity, the handle includes a connecting portion for connecting to the housing, the front end of the connecting portion extends to the bottom of the ultrasonic transducer assembly, and,

[0019] The connecting portion is provided with a wire passage, one end of the wire passage is connected to the electrical transmission component, and the other end is connected to the first air outlet channel.

[0020] In some embodiments, the handle is provided with a start button, the start button is electrically connected to the ultrasonic transducer assembly via the first air outlet channel and the wire passage, and the start button is detachably connected to the handle.

[0021] In some embodiments, the handle is integrally formed with the housing.

[0022] In some embodiments, the handheld ultrasonic drill further includes a damper, a guide member and a guide bracket, wherein:

[0023] The damper is fixed to the housing, and the movable end of the damper extends toward the front side;

[0024] The guide member is fixed to the housing, and the guide member extends toward the front side and is parallel to the movable end of the damper;

[0025] The guide bracket is arranged at the front end of the shell, and the guide bracket is connected to the movable end of the damper, and the guide bracket is slidably sleeved on the guide member.

[0026] Compared with the prior art, the handheld ultrasonic drill implemented by the present invention has the following beneficial effects:

[0027] The handheld ultrasonic drill provided by the present invention arranges the center of gravity of the handheld ultrasonic drill within the projection column of the handle, so that when the user holds the handheld ultrasonic drill, the center of gravity of the handheld ultrasonic drill will not deviate from the user's holding position, which greatly reduces the torque between the gravity of the handheld ultrasonic drill and the user's holding position, making the handheld ultrasonic drill more ergonomic as a whole, avoiding the situation where the wrist is twisted when the user holds the ultrasonic drill with one hand, which is conducive to the one-handed holding of the handheld ultrasonic drill, and solving the problem that the existing handheld ultrasonic drill is prone to cause fatigue in one-handed operation.

[0028] Moreover, the handheld ultrasonic drill can cool the reduction assembly, reduce the heat generated by the reduction assembly, and improve the working efficiency of the reduction assembly by extending any of the first air inlet channel, the second air inlet channel, the first air outlet channel, and the second air outlet channel to the side of the reduction assembly.

[0029] Moreover, the handheld ultrasonic drill is provided with a wire passage and uses the first air outlet passage as a part of the wiring passage, so that the wiring path of the handheld ultrasonic drill is more reasonable and the structure of the handheld ultrasonic drill is more exquisite and compact.

[0030] Moreover, the handheld ultrasonic drill optimizes the matching structure of the guide bracket, the damper and the guide member to make the matching structure of the guide bracket, the damper and the guide member more compact, thereby avoiding the guide bracket from expanding the radial size of the handheld ultrasonic drill, which leads to an increase in the volume of the handheld ultrasonic drill. The handheld ultrasonic drill is compact in structure and light in weight, and can be operated with one hand, thereby improving processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a schematic diagram of a handheld ultrasonic drill according to an embodiment of the present invention;

[0032] Figure 2 is a schematic diagram of a projection cylinder in an embodiment of the present invention;

[0033] Figure 3 is a cross-sectional schematic diagram of a handheld ultrasonic drill according to an embodiment of the present invention;

[0034] Figure 4 yes Figure 3A magnified view of middle;

[0035] Figure 5 is a schematic cross-sectional view of a housing in an embodiment of the present invention;

[0036] Figure 6 is a schematic cross-sectional view of a housing at another angle in an embodiment of the present invention;

[0037] Figure 7 is another schematic diagram of a handheld ultrasonic drill according to an embodiment of the present invention;

[0038] Figure 8 yes Figure 7 Schematic cross-section of the structure shown.

[0039] In the figure, 100, hand-held ultrasonic drill; 1, shell; 2, accommodating cavity; 3, driving unit; 3a, pneumatic motor; 3b, reducer; 4, ultrasonic transducer assembly; 4a, transducer shell; 4b, transducer; 5, handle; 5a, handle body; 5b, connecting part; 6, projection column; 7, amplitude rod; 8, drill chuck; 9, drill bit; 10, third air inlet channel; 11, first air inlet channel; 12, first air outlet channel; 13, second air inlet channel; 14, second air outlet channel; 15, third air outlet channel; 16, wireless receiving unit; 17, wireless transmitting unit; 18, rear bearing; 19, front bearing; 20, bearing pressure ring; 21, wire-passing channel; 22, start button; 23, damper; 24, guide; 25, guide bracket; 26, buffer pad; 27, cavity; 28, install inner shell; 29, air passage. DETAILED DESCRIPTION

[0040] The specific implementation of the present invention is further described in detail below 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.

[0041] In the description of the present invention, 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 invention can be understood according to the specific circumstances.

[0042] 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.

[0043] 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 should not 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.

[0044] Example

[0045] refer to Figure 1-8 An embodiment of the present invention provides a handheld ultrasonic drill 100, which includes a shell 1, a housing 2 with an opening toward the front side is provided in the shell 1, and a driving unit 3 and an ultrasonic transducer assembly 4 are arranged in sequence from the back side to the front side in the housing 2; and the shell 1 is provided with a handle 5, and the center of gravity of the handheld ultrasonic drill 100 is located in a projection column 6 of the handle 5, and the projection column 6 is a column extending in the vertical direction from the horizontal projection of the handle 5.

[0046] In this embodiment, when the handheld ultrasonic drill 100 is generally used, the side to which the drill bit 9 faces is defined as the front side / front end, and the side opposite thereto is defined as the rear side / rear end. Furthermore, when the handheld ultrasonic drill 100 is generally used, the side to which the handle 5 is located is defined as the lower side / bottom, and the side opposite thereto is defined as the upper side / upper end.

[0047] It is understandable that the center of gravity of the handheld ultrasonic drill 100 refers to the center of gravity position of the handheld ultrasonic drill 100 when the handheld ultrasonic drill 100 is not equipped with the drill bit 9. The weight of the handheld ultrasonic drill 100 is generally much greater than the weight of the drill bit 9. Therefore, when the center of gravity of the handheld ultrasonic drill 100 is located at the projection column 6 of the handle 5, the center of gravity position of the handheld ultrasonic drill 100 equipped with the drill bit 9 will not change significantly, and its center of gravity is generally still located within the projection column 6 of the handle 5.

[0048] It should be noted that the projection cylinder 6 of the handle 5 refers to the space surrounded by the projection cylinder of the handle 5, wherein the projection cylinder of the handle 5 takes the outer contour line of the horizontal projection of the handle 5 as the directrix and the straight line in the vertical direction, that is, the straight line perpendicular to the horizontal plane as the generatrix, and the generatrix is ​​moved parallel to the directrix to generate the curved surface, that is, the projection cylinder is a cylinder extending in the vertical direction from the horizontal projection of the handle.

[0049] It should be noted that the housing 1 and the handle 5 can be integrally formed or separately designed, i.e., detachable. In the case where the housing 1 and the handle 5 are separately designed, the horizontal projection of the handle 5 is the projection of the handle 5 removed from the housing 1 on the horizontal plane, while in the case where the housing 1 and the handle 5 are integrally formed, the horizontal projection of the handle 5 is the projection of the handle 5 area on the horizontal plane, which includes the projection of the connection position of the handle 5 and the housing 1 on the horizontal plane, i.e., the projection column 6 is a column extending in the vertical direction from the horizontal projection of the handle.

[0050] The center of gravity of the handheld ultrasonic drill 100 is arranged in the projection column 6 of the handle 5, so that when the user holds the handheld ultrasonic drill 100, the gravity of the handheld ultrasonic drill 100 falls on the user's hand through the handle 5, and there is no interval between the center of gravity of the handheld ultrasonic drill 100 and the position of the handle 5. When the gravity of the handheld ultrasonic drill 100 acts on the handle 5, no torque is applied to the user's hand or only a very small torque is applied. The user's hand only needs to bear the weight of the handheld ultrasonic drill 100 without bearing additional torque. Compared with the existing handheld air drill, the user holds the handheld ultrasonic drill 100 through the handle 5, which can avoid the situation that the user's wrist twists when holding the ultrasonic drill with one hand, and realizes the one-handed holding of the handheld ultrasonic drill 100. Of course, arranging the center of gravity of the handheld ultrasonic drill 100 in the handle 5 can ensure that no torque is generated between the gravity of the handheld ultrasonic drill 100 and the handle 5, which is more conducive to the user's one-handed holding.

[0051] It is understandable that, based on performance requirements, the handheld ultrasonic drill 100 may be equipped with drive units 3 and ultrasonic transducer assemblies 4 of different models and specifications, and the weights of drive units 3 and ultrasonic transducer assemblies 4 of different models and specifications may be different. In order to allow the center of gravity of the handheld ultrasonic drill 100 to be located within the projection column 6 of the handle 5, the handle 5 may be located below the drive unit 3 and the ultrasonic transducer assembly 4, or only below the drive unit 3.

[0052] For example, the front end of the handle 5 is extended to below the ultrasonic transducer assembly 4, and the rear end of the handle 5 is extended to below the drive unit 3. Such an arrangement can properly balance the weight of the front and rear sides of the handle 5, so that the weight distribution of the handheld ultrasonic drill 100 is more balanced. When the user operates the handheld ultrasonic drill 100, the wrist will not be twisted due to the uneven weight distribution of the handheld ultrasonic drill 100, thereby ensuring that the handheld ultrasonic drill 100 is labor-saving to operate, thereby improving the user experience.

[0053] It should be noted that the handle 5 of this example includes a handle body 5a and a connecting portion 5b, and the connecting portion 5b is used to connect the handle body 5a to the housing 1. Therefore, the front end of the handle 5 is extended to the bottom of the ultrasonic transducer assembly 4, and the rear end of the handle 5 is extended to the bottom of the drive unit 3, which can be achieved by adjusting the position of the handle body 5a or adjusting the position of the connecting portion 5b, for example, the front end of the handle body 5a is extended to the bottom of the ultrasonic transducer assembly 4, and the rear end of the handle body 5a is extended to the bottom of the drive unit 3, or the front end of the connecting portion 5b is extended to the bottom of the ultrasonic transducer assembly 4, and the rear end of the connecting portion 5b is extended to the bottom of the drive unit 3.

[0054] refer to Figure 1-6 As an example of this embodiment, the accommodating chamber 2 is a cylindrical space extending in the front-to-back direction. The ultrasonic transducer assembly 4 includes a transducer housing 4a, and a transducer 4b is arranged in the transducer housing 4a. The front end of the transducer housing 4a is connected to a variable amplitude rod 7, which extends out of the accommodating chamber 2 and is equipped with a drill chuck 8 to install a drill bit 9. The drill chuck 8 can drive the drill bit 9 to rotate so that the drill bit 9 performs drilling operations. In this example, the housing 1 and the handle 5 are of an integrally formed design, and the transducer 4b assembly is also installed in the housing 1, which can relatively improve the overall rigidity of the handheld ultrasonic drill 100.

[0055] The driving unit 3 includes a pneumatic motor 3a and a reducer 3b connected in sequence from the rear side to the front side, and the reducer 3b is connected to the output end of the pneumatic motor 3a and is located in front of the pneumatic motor 3a. The pneumatic motor 3a is a driving component, which 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 pneumatic motor 3a can rotate relative to the housing 1 to output power, and is transmitted to the drill chuck 8 through the reducer 3b and the ultrasonic transducer assembly 4. When the pneumatic motor 3a outputs power, the drill chuck 8 rotates accordingly, thereby driving the drill bit 9 to rotate to achieve the drilling action.

[0056] The reducer 3b is a reduction component, which is mainly used to adjust the speed output by the pneumatic motor 3a, and can adopt a planetary gear structure, wherein the outer ring sun gear of the planetary gear structure can be interference-fitted with the inner wall of the housing 1 and fixed on the inner wall of the housing 1. No additional drawings are provided here for illustration.

[0057] The gas flow channel is arranged inside the housing 1 and the handle 5 so as to supply the gas flow provided by the external gas source to the pneumatic motor 3a. Figure 1-6As an example of the gas flow channel of the present embodiment, a first air inlet channel 11 and a first air outlet channel 12 arranged at intervals are provided in the handle 5, and a second air inlet channel 13 and a second air outlet channel 14 are provided in the shell 1. The second air inlet channel 13 and the second air outlet channel 14 are arranged at intervals relative to the accommodating chamber 2, and the second air inlet channel 13 and the second air outlet channel 14 extend to the reducer 3b side; a cavity 27 is formed between the pneumatic motor 3a and the side wall of the accommodating chamber 2, and the first air inlet channel 11, the second air inlet channel 13, the cavity 27, the second air outlet channel 14, and the first air outlet channel 12 are connected in sequence to form a gas flow channel.

[0058] It should be noted that in the handheld ultrasonic drill 100 described as an example in this embodiment, the accommodating chamber 2 is a cylindrical space that accommodates the driving unit 3 and the ultrasonic transducer assembly 4, and the second air inlet channel 13 and the second air outlet channel 14 arranged inside the housing are not components of the accommodating chamber 2. Of course, as gas channels, the second air inlet channel 13 and the second air outlet channel 14 need to have a wall body that guides the flow direction of the gas, so in the handheld ultrasonic drill 100 of this embodiment, the second air inlet channel 13, the second air outlet channel 14 and the accommodating chamber 2 share part of the wall body.

[0059] The second air inlet channel 13 and / or the second air outlet channel 14 can extend to the side of the reducer 3b, so as to cool the reducer 3b and improve the working efficiency of the reducer 3b. It should be noted that the handheld ultrasonic drill 100 can adjust the position of the second air inlet channel 13 and / or the second air outlet channel 14 to adjust the air flow through the reducer 3b. For example, in some handheld ultrasonic drills 100, only the second air inlet channel 13 can be extended to the side of the reducer 3b, or only the second air outlet channel 14 can be extended to the side of the reducer 3b.

[0060] By setting a first air inlet channel 11, a second air inlet channel 13, a first air outlet channel 12 and a second air outlet channel 14, and making the second air inlet channel 13 and the second air outlet channel 14 spaced apart relative to the accommodating chamber 2, and at least one of the second air inlet channel 13 and the second air outlet channel 14 extending to the reducer 3b, at least part of the airflow will flow around the pneumatic motor 3a and the reducer 3b, so that the airflow that drives the pneumatic motor 3a is used as a cooling airflow to take away the heat generated by the operation of the pneumatic motor 3a and the reducer 3b to the outside.

[0061] It should be noted that the air inlet of the pneumatic motor 3a of the present embodiment is arranged at the rear end. Therefore, in some handheld ultrasonic drills 100, a third air inlet channel 10 will be arranged between the rear end of the drive unit 3 and the accommodating cavity 2, and the first air inlet channel 11, the second air inlet channel 13, the third air inlet channel 10, the cavity 27, the second air outlet channel 14, and the first air outlet channel 12 are connected in sequence to form a gas flow channel, so that the air flow can flow to the rear end of the pneumatic motor 3a, thereby achieving the purpose of taking away the heat generated by the operation of the pneumatic motor 3a and the reducer 3b.

[0062] It is understandable that the pneumatic motor 3a of this embodiment is not provided with an outer wall on the outer peripheral side of the blade, so the pneumatic motor 3a of this embodiment needs to be provided with a cavity 27 so that the blades of the pneumatic motor 3a can match with the inner wall of the accommodating chamber 2. The cavity 27 is arranged on the peripheral side of the pneumatic motor 3a, and the airflow flowing to the cavity 27 through the second air inlet channel 13 will drive the impeller of the pneumatic motor 3a to rotate, so that the pneumatic motor 3a works.

[0063] It should be noted that in other pneumatic motors 3a, the air inlet of the pneumatic motor 3a can also be arranged on the peripheral side. In this type of handheld ultrasonic drill 100, there is no need to arrange the third air inlet channel 10 between the rear end of the drive unit 3 and the accommodating chamber 2. Usually, a corresponding hole / channel is arranged on the side wall of the second air inlet channel 13 close to the pneumatic motor 3a, so that the airflow flows from the second air inlet channel 13 into the accommodating chamber 2, so that the airflow enters the cavity 27, and drives the pneumatic motor 3a to operate.

[0064] It should be noted that, in some handheld ultrasonic drills 100 , only the third air inlet channel 10 may be provided, and the cavity 27 may be selectively configured according to the performance of the handheld ultrasonic drill 100 . For example, in the case where the pneumatic motor 3a itself is provided with an outer side wall that matches the blades, there is no need to set a cavity 27 between the pneumatic motor 3a and the side wall of the accommodating chamber 2. At this time, if the air inlet of the pneumatic motor 3a is set on the rear side, then a third air inlet channel 10 will be provided between the rear end of the drive unit 3 and the accommodating chamber 2. The airflow can flow along the first air inlet channel 11, the second air inlet channel 13, the third air inlet channel 10, the pneumatic motor 3a, the second air outlet channel 14, and the first air outlet channel 12 in sequence to cool the pneumatic motor 3a and the reducer 3b. In this type of handheld ultrasonic drill 100, the structures of the first air inlet channel 11, the second air inlet channel 13, the third air inlet channel 10, the second air outlet channel 14, and the first air outlet channel 12 are the same as those of the handheld ultrasonic drill 100 exemplified in this embodiment. Moreover, after the airflow passes through the third air inlet channel 10, it will enter the interior of the pneumatic motor to drive the pneumatic motor 3a to operate, which will not be repeated here. Of course, in the case where the air motor 3a is not provided with an outer side wall that matches the blade, a cavity 27 needs to be provided between the air motor 3a and the side wall of the accommodating chamber 2. At this time, if the air inlet of the air motor 3a is provided at the rear side, a third air inlet channel 10 will be provided between the rear end of the drive unit 3 and the accommodating chamber 2. This type of handheld ultrasonic drill 100 constitutes Figure 1-6 In the structure shown, the air flow flows along the first air inlet channel 11, the second air inlet channel 13, the cavity 27, the third air inlet channel 10, the second air outlet channel 14, and the first air outlet channel 12 in sequence, driving the pneumatic motor 3a to operate and cooling the pneumatic motor 3a and the reducer 3b.

[0065] It should be noted that the pneumatic motor 3a is not an inevitable choice for the drive assembly. In some handheld ultrasonic drills 100, the drive assembly can also be an electric motor. In this type of handheld ultrasonic drill 100, the airflow can flow along the first air inlet channel 11, the second air inlet channel 13, the third air inlet channel 10, the second air outlet channel 14, and the first air outlet channel 12 in sequence, or along the first air inlet channel 11, the second air inlet channel 13, the cavity 27, the second air outlet channel 14, and the first air outlet channel 12 in sequence, or along the first air inlet channel 11, the second air inlet channel 13, the cavity 27, the third air inlet channel 10, the second air outlet channel 14, and the first air outlet channel 12 in sequence to cool the drive assembly and the reducer 3b. It should be noted that in this type of handheld ultrasonic drill 100, the airflow will not enter the interior of the electric motor, but will flow outside the electric motor to take away the heat from the operation of the electric motor.

[0066] It should be noted that, in order to install the drive unit 3 in the accommodating chamber 2 and divide the second air inlet channel 13 and the second air outlet channel 14 on both sides of the drive unit 3, an installation inner shell 28 extending from the rear side to the front side is usually provided in the accommodating chamber 2, and the installation inner shell 28 cooperates with the outer shell 1 to form the accommodating chamber 2, that is, the installation inner shell 28 is used as a part of the side wall of the accommodating chamber 2, and the second air inlet channel 13 and the second air outlet channel 14 are formed between the installation inner shell 28 and the outer shell 1. In order to allow the air flow to flow from the position of the pneumatic motor 3a into the second air outlet channel 14, an air passage 29 may be provided on the installation inner shell 28, and the air passage 29 connects the cavity 27 with the second air outlet channel 14.

[0067] It should be noted that the housing 1 does not necessarily have an inner housing 28. In some handheld ultrasonic drills 100, the drive unit 3 itself has a housing, and cooperates with the inner wall of the housing 1 to achieve connection and fixation. In this type of handheld ultrasonic drill 100, the accommodating chamber 2 is the entire internal space of the housing 1, and the second air inlet channel 13 and the second air outlet channel 14 are usually arranged inside the wall of the housing 1, so that the second air inlet channel 13 and the second air outlet channel 14 are arranged at intervals relative to the accommodating chamber 2.

[0068] According to the performance requirements of the handheld ultrasonic drill 100, the arrangement position of the handle 5, the arrangement position of the ultrasonic transducer assembly 4 and the arrangement position of the drive unit 3 will be adjusted. In different models of handheld ultrasonic drills 100, the first air inlet channel 11 and the first air outlet channel 12 can be arranged in a front-to-back arrangement or in a left-to-right parallel arrangement. There is no strict restriction on the relative position between the first air inlet channel 11 and the first air outlet channel 12. The first air outlet channel 12 only needs to be connected to the outside and can directly discharge the gas. For example, the first air outlet channel 12 can be arranged on the front side of the first air inlet channel 11 or on the rear side of the first air inlet channel 11; or, the first air outlet channel 12 can be arranged on the left side of the first air inlet channel 11 or on the right side of the first air inlet channel 11. Generally speaking, the first air outlet channel 12 is arranged on the front side of the first air inlet channel 11, so that the first air outlet channel 12 is closer to the ultrasonic transducer assembly 4, which is conducive to the airflow to take away the heat generated by the operation of the ultrasonic transducer assembly 4.

[0069] The second air inlet channel 13 and the second air outlet channel 14 are formed on the inner wall of the housing 1 and are arranged at intervals relative to the drive unit 3, so that the airflow can flow around the drive unit 3, especially around the reducer 3b, to cool the reducer 3b, reduce the heat generated by the reducer 3b, and improve the working efficiency of the reducer 3b. Figure 1-6As an example of this embodiment, the second air inlet channel 13 is arranged below the driving unit 3, and the second air outlet channel 14 is arranged above the driving unit 3, which is beneficial to shorten the distance between the gas flow and the pneumatic motor 3a and avoid excessive attenuation of the gas flow rate.

[0070] Of course, when the second air outlet channel 14 is disposed above the drive unit 3, since the first air outlet channel 12 is disposed in the handle 5, and the handle 5 is disposed below the housing 1, this will cause the first air outlet channel 12 to be spaced a certain distance from the second air outlet channel 14, and the two are not convenient to be directly connected. Therefore, other air flow channels can be disposed in the housing 1 to assist gas circulation. Figure 1-6 As an example of this embodiment, a third air outlet channel 15 is provided in the housing 1, and the third air outlet channel 15 is arranged around the driving unit 3 to connect the first air outlet channel 12 with the second air outlet channel 14, wherein, according to the performance requirements of the handheld ultrasonic drill 100, the third air outlet channel 15 can be arranged around the pneumatic motor 3a, or around the reducer 3b.

[0071] The third gas outlet channel 15 is an annular channel. After the gas flows from the second gas outlet channel 14 into the third gas outlet channel 15, it flows on the outer peripheral side of the driving unit 3 to cool the outer peripheral side of the driving unit 3. Next, the handheld ultrasonic drill 100 of this embodiment will be further described with the third gas outlet channel 15 being arranged around the reducer 3b.

[0072] The handheld ultrasonic drill 100 can also adjust the position of the first air inlet channel 11 and / or the first air outlet channel 12 to allow more gas to flow through the position of the reducer 3b of the drive unit 3. Figure 1-6 As an example of this embodiment, the first air inlet channel 11 extends to the bottom of the reducer 3b of the drive unit 3 and is connected to the second air inlet channel 13; and the first air outlet channel 12 extends to the bottom of the reducer 3b of the drive unit 3 and is connected to the second air outlet channel 14. In this way, when the gas flows in from the first air inlet channel 11 and flows along the second air inlet channel 13, the third air inlet channel 10, the second air outlet channel 14, and the first air outlet channel 12 in sequence, the gas is always in the vicinity of the drive unit 3, which can effectively cool the reducer 3b and the pneumatic motor 3a. Of course, in other examples, the handheld ultrasonic drill 100 can also only arrange the first air inlet channel 11 below the drive unit 3, or only arrange the first air outlet channel 12 below the drive unit 3, as long as the heat generated by the operation of the drive unit 3 can be taken away by the gas in time.

[0073] The accommodating cavity 2 is equipped with an electric transmission component for providing electric energy to the ultrasonic transducer component 4, which can be arranged on the outside of the transducer housing 4a, wherein the electric transmission component can be a wireless transmission component or a brush component. Figure 1-6 This embodiment is described with a wireless transmission component. Specifically, the wireless transmission component includes a wireless receiving unit 16 and a wireless transmitting unit 17, wherein the wireless receiving unit 16 and the wireless transmitting unit 17 are both surrounded by the outer peripheral side of the transducer housing 4a, and the wireless receiving unit 16 is arranged at the front side of the wireless transmitting unit 17. The output end of the reducer 3b is fixedly connected to the transducer housing 4a. The outer periphery of the rear end of the transducer housing 4a is sequentially sleeved with a rear bearing 18, a wireless receiving unit 16, a front bearing 19 and a bearing pressing ring 20 from the rear side to the front side, and the rear bearing 18 is arranged between the rear end of the ultrasonic transducer assembly 4 and the housing 1, and the wireless transmitting unit 17 is arranged between the rear bearing 18 and the wireless receiving unit 16, and is fitted on the side wall of the housing 1.

[0074] The outer rings of the front bearing 19 and the rear bearing 18 are both fitted with the inner wall of the accommodating chamber 2 to determine the relative position between the transducer housing 4a and the housing 1. Under the constraints of the front bearing 19 and the rear bearing 18, the transducer housing 4a can rotate around the central axis of the accommodating chamber 2 to avoid radial runout when the transducer housing 4a rotates. Moreover, the third air outlet channel 15 is close to the rear bearing 18, so that the airflow flowing through the gas flow channel can also cool the rear bearing 18.

[0075] It should be noted that the electrical transmission component needs to be connected to an external power source to obtain electrical energy. Adding an additional wiring channel outside the gas flow channel will undoubtedly increase the volume of the handheld ultrasonic drill 100. Therefore, it is possible to consider using the gas flow channel to arrange the wires of the electrical transmission component so that the handheld ultrasonic drill 100 forms a gas-electric integrated structure.

[0076] refer to Figure 1-6 As an example of this embodiment, the handle 5 includes a connection portion 5b for connecting to the housing 1, the front end of the connection portion 5b extends to the bottom of the ultrasonic transducer assembly 4, and the connection portion 5b is provided with a wire passage 21, one end of the wire passage 21 is connected to the ultrasonic transducer assembly 4, and the other end is connected to the first gas outlet channel 12. The wire passage 21 is used for wiring, so that the wires are hidden in the gas flow channel, and there is no need to arrange additional channels for the wires in the housing 1, which can save space in the housing 1 and is conducive to the compact structure of the handheld ultrasonic drill 100.

[0077] By cooperating with the driving unit 3 and the ultrasonic transducer assembly 4, the handheld ultrasonic drill 100 can make the drill bit 9 achieve high-frequency vibration. Moreover, by utilizing the high-frequency vibrating drill bit 9, the handheld ultrasonic drill 100 can process carbon fiber composite materials such as carbon fiber braided tapes and unidirectional tapes in the aviation industry, as well as Kevlar bulletproof materials and other difficult-to-process materials. Of course, the handheld ultrasonic drill 100 can also drive the drill bit 9 to move only through the driving unit 3. Correspondingly, the handheld ultrasonic drill 100 can be equipped with a start button 22 for controlling the opening and closing of the ultrasonic transducer assembly 4. Reference Figure 1-6 As an example of this embodiment, the start button 22 is detachably connected and arranged in the handle 5, so that the user can touch the start button 22 when holding the handheld ultrasonic drill 100. The start button 22 is electrically connected to the wireless transmitting unit 17 through the first air outlet channel 12 and the wire passage 21. In this way, the wires and the air inlet pipe of the handheld ultrasonic drill 100 are both led out from the lower end of the handle 5. Compared with the structure in which the wires are led out from the top of the handheld drill, the line layout of the handheld ultrasonic drill 100 is simpler and the lines are not easily interfered.

[0078] The front end of the handheld ultrasonic drill 100 may be provided with a guide structure to guide the movement path of the drill bit 9, and in order to prevent the user from operating the handheld ultrasonic drill 100 to advance too fast, a buffer device may be configured on the guide structure to facilitate the stable advancement of the handheld ultrasonic drill 100. Figure 7-8 As an example of this embodiment, the handheld ultrasonic drill 100 further includes a damper 23, a guide member 24 and a guide bracket 25, wherein an end cover is installed at the front end of the housing 1, and a locking ring is sleeved on the front end of the end cover, and the locking ring is fixed to the housing 1 or the end cover by a fastener, such as a screw, and the damper 23 is installed on the locking ring, so that the damper 23 is connected and fixed to the housing 1, and the movable end of the damper 23 extends to the front side and is fixedly connected to the guide bracket 25, and the damper 23 is arranged at the upper position of the housing 1, and can also be used to adjust the handheld ultrasonic drill 100. The center of gravity of the drill 100; the guide member 24 is a rod-shaped structure, the rear end of the guide member 24 is clamped between the lock ring and the end cover, so that the guide member 24 is connected and fixed to the housing 1, and the front end of the guide member 24 extends forward, is inserted into the guide bracket 25, and is parallel to the movable end of the damper 23; the guide bracket 25 is arranged at the front end of the housing 1, and the guide bracket 25 is slidably mounted on the guide member 24. Specifically, the guide bracket 25 is connected to the movable end of the damper 23 and is mounted on the guide member 24 to move relative to the guide member 24.

[0079] A buffer pad 26 is installed at the front end of the guide bracket 25. The buffer pad 26 contacts the workpiece to prevent the workpiece surface from hard contact with the guide bracket 25. When the user operates the handheld ultrasonic drill 100 to drill, the buffer pad 26 is positioned on the workpiece, the handheld ultrasonic drill 100 moves toward the workpiece with the handle 5, the guide member 24 passes through the sliding sleeve in the guide bracket 25 and moves toward the workpiece, and the damper 23 controls the speed at which the handheld ultrasonic drill 100 moves forward, thereby controlling the processing speed of the drill bit 9.

[0080] It should be noted that the damper 23, the guide member 24 and the guide bracket 25 configured in the handheld ultrasonic drill 100 should be compatible with the structure of the handheld ultrasonic drill 100, so that after the handheld ultrasonic drill 100 is configured with the damper 23, the guide member 24 and the guide bracket 25, the center of gravity of the handheld ultrasonic drill 100 is still within the projection column 6 of the handle 5.

[0081] In some handheld ultrasonic drills 100, the ultrasonic transducer assembly 4 is connected to a horn 7 to amplify the amplitude of the ultrasonic transducer assembly 4. The front end of the horn 7 usually extends outside the accommodating cavity 2 to facilitate the connection of the drill bit 9. In this type of handheld ultrasonic drill 100, the structure of the guide bracket 25 needs to be adjusted to match the horn 7. For example, referring to Figure 7-8 As an example of this embodiment, the guide bracket 25 is arranged around the horn 7, and a through hole is arranged on the guide bracket 25 for the drill bit 9 to pass through, and the number of the guide members 24 is three, and the three guide members 24 are arranged around the through hole. Of course, in other handheld ultrasonic drills 100 provided with the guide bracket 25, the guide bracket 25 is usually also provided with a channel for the drill bit 9 to pass through, so that the guide bracket 25 and the drill bit 9 can cooperate with each other.

[0082] In summary, the handheld ultrasonic drill 100 provided in the embodiment of the present invention arranges the center of gravity of the handheld ultrasonic drill 100 within the projection column 6 of the handle 5. In this way, when the user holds the handheld ultrasonic drill 100, the center of gravity of the handheld ultrasonic drill 100 will not deviate from the user's holding position, which greatly reduces the torque between the gravity of the handheld ultrasonic drill 100 and the user's holding position, making the handheld ultrasonic drill 100 more ergonomic as a whole, avoiding the situation where the wrist is twisted when the user holds the ultrasonic drill with one hand, which is conducive to the one-handed holding of the handheld ultrasonic drill 100, and solving the problem that the existing handheld ultrasonic drill 100 is easy to cause fatigue in one-handed operation.

[0083] Moreover, the handheld ultrasonic drill 100 is provided with a first air inlet channel 11, a second air inlet channel 13, a first air outlet channel 12 and a second air outlet channel 14, and the second air inlet channel 13 and the second air outlet channel 14 are arranged with respect to the accommodating cavity at intervals, and at least one of the second air inlet channel 13 and the second air outlet channel 14 extends to the reduction assembly. In this way, at least part of the airflow will flow around the driving assembly and the reduction assembly, thereby taking away the heat generated by the operation of the driving assembly and the reduction assembly to the outside, thereby preventing the heat generated by the operation of the driving assembly and the reduction assembly from accumulating in the accommodating cavity 2.

[0084] Moreover, the handheld ultrasonic drill 100 is provided with a wire passage 21 and uses the first air outlet passage 12 as a part of the wiring passage, so that the wiring path of the handheld ultrasonic drill 100 is more reasonable and the structure of the handheld ultrasonic drill 100 is more exquisite and compact.

[0085] Moreover, the handheld ultrasonic drill 100 optimizes the matching structure of the guide bracket 25, the damper 23 and the guide member 24 to make the matching structure of the guide bracket 25, the damper 23 and the guide member 24 more compact, thereby preventing the guide bracket 25 from expanding the radial dimension of the handheld ultrasonic drill 100 and causing the volume of the handheld ultrasonic drill 100 to increase. As a result, the handheld ultrasonic drill 100 has a compact structure and a light weight, so that the handheld ultrasonic drill 100 can be operated with one hand, thereby improving the processing efficiency.

[0086] 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 principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A handheld ultrasonic drill, characterized in that: It comprises a housing, wherein a housing is provided in the housing, wherein a driving unit and an ultrasonic transducer assembly are provided in the housing from the rear side to the front side in sequence; and The housing is provided with a handle, and the center of gravity of the handheld ultrasonic drill is located in a projection column of the handle, and the projection column is a column formed by the horizontal projection of the handle extending in the vertical direction.

2. The handheld ultrasonic drill according to claim 1, characterized in that: The center of gravity of the handheld ultrasonic drill is arranged in the handle.

3. The handheld ultrasonic drill according to claim 1 or 2, characterized in that: The handle comprises a connecting portion for connecting to the housing, a front end of the connecting portion extends to below the ultrasonic transducer assembly, and a rear end of the connecting portion extends to below the driving unit.

4. The handheld ultrasonic drill according to claim 1, characterized in that: The driving unit comprises a deceleration assembly and a driving assembly connected in sequence from front to back, a cavity is provided between the driving assembly and the side wall of the accommodating cavity, and, The handle is provided with a first air inlet channel and a first air outlet channel arranged at intervals, and the shell is provided with a second air inlet channel and a second air outlet channel, the second air inlet channel and the second air outlet channel are arranged at intervals relative to the accommodating cavity, and the first air inlet channel, the second air inlet channel, the cavity, the second air outlet channel, and the first air outlet channel are connected in sequence.

5. The handheld ultrasonic drill according to claim 4, characterized in that: The first air intake passage extends to below the deceleration assembly and communicates with the second air intake passage; and / or, The first air outlet passage extends to below the deceleration assembly and communicates with the second air outlet passage; and / or, The second air intake passage extends to the reduction assembly side and communicates with the first air intake passage; and / or, The second air outlet passage extends to the speed reduction assembly side and is communicated with the first air outlet passage.

6. The handheld ultrasonic drill according to claim 4, characterized in that: A third air outlet passage is disposed in the housing. The third air outlet passage is arranged around the deceleration assembly and is connected with the first air outlet passage and the second air outlet passage.

7. The handheld ultrasonic drill according to claim 4, characterized in that: The second air inlet channel is disposed below the driving unit, and the second air outlet channel is disposed above the driving unit.

8. The handheld ultrasonic drill according to claim 4, characterized in that: An electric transmission assembly arranged around the ultrasonic transducer assembly is also installed in the accommodating cavity, the handle includes a connecting portion for connecting to the housing, the front end of the connecting portion extends to the bottom of the ultrasonic transducer assembly, and, The connecting portion is provided with a wire passage, one end of the wire passage is connected to the electrical transmission component, and the other end is connected to the first air outlet channel.

9. The handheld ultrasonic drill according to claim 8, characterized in that: The handle is provided with a start button, the start button is electrically connected to the ultrasonic transducer assembly via the first air outlet channel and the wire passage, and the start button is detachably connected to the handle.

10. The handheld ultrasonic drill according to claim 1, characterized in that: The handle is integrally formed with the housing.

11. The handheld ultrasonic drill according to claim 1, characterized in that: The handheld ultrasonic drill also includes a damper, a guide member and a guide bracket, wherein: The damper is fixed to the housing, and the movable end of the damper extends toward the front side; The guide member is fixed to the housing, and the guide member extends toward the front side and is parallel to the movable end of the damper; The guide bracket is arranged at the front end of the shell, and the guide bracket is connected to the movable end of the damper, and the guide bracket is slidably sleeved on the guide member.

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