Handheld ultrasonic drill

Abstract

The utility model discloses a handheld ultrasonic drill, which relates to the technical field of drilling processing equipment, and comprises a shell, a containing cavity with an opening facing the front side is arranged 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 utility model, 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 utility model relates to borehole processing equipment technical field, especially hand -held ultrasonic drill. BACKGROUND

[0002] As a kind of drilling tool, hand -held ultrasonic drill is often used in aviation industry carbon fiber woven belt, unidirectional belt and the drilling work of carbon fiber composite material and kevlar bulletproof material.

[0003] The existing hand -held ultrasonic drill, ultrasonic transducer and variable amplitude rod are usually arranged at the front end position of hand -held ultrasonic drill, compared with ordinary hand -held air drill, the axial length of this type of hand -held ultrasonic drill is longer, so that the overall volume of existing hand -held ultrasonic drill is large, and the quality is heavy, using this type of ultrasonic drill, it is easy to cause single hand operation to be more tired, and work efficiency is reduced, and the center of gravity of this type of hand -held ultrasonic drill moves forward, often needs to be configured auxiliary handle, for operator to hold with both hands, operation is very inconvenient. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of hand -held ultrasonic drill, the center of gravity of hand -held ultrasonic drill is matched with handle position by optimizing the structure of hand -held ultrasonic drill, realize the single hand holding of hand -held ultrasonic drill, solve the problem that existing hand -held ultrasonic drill easily leads to single hand operation tired.

[0005] In order to realize the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A kind of hand -held ultrasonic drill, including shell, the shell is provided with containing cavity, the containing cavity is provided with drive unit and ultrasonic transducer assembly connected in sequence from rear side to front side;And,

[0007] The shell is provided with handle, and the center of gravity of the hand -held ultrasonic drill is in the projection cylinder of the handle, the projection cylinder is the column body that the horizontal projection of the handle extends along vertical direction.

[0008] In some embodiments, the center of gravity of the hand -held ultrasonic drill is arranged in the handle.

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

[0010] In some embodiments, the drive unit includes a reduction assembly and a drive assembly connected in sequence from front to back, a cavity is provided between the drive assembly and the side wall of the containing 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 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 sequentially communicated.

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

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

[0014] the second air inlet channel extends to the side of the deceleration assembly and communicates with the first air inlet channel; and / or,

[0015] the second air outlet channel extends to the side of the deceleration assembly and communicates with the first air outlet channel.

[0016] In some embodiments, the shell is provided with a third air outlet channel arranged around the deceleration assembly and communicating the first air outlet channel and the second air outlet channel.

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

[0018] In some embodiments, the accommodating cavity is further provided with an electric transmission assembly arranged around the ultrasonic transducer assembly, the handle comprises a connecting portion for connecting with the shell, the front end of the connecting portion extends below the ultrasonic transducer assembly, and,

[0019] the connecting portion is provided with a wire passage, one end of the wire passage communicates with the electric transmission assembly, and the other end communicates with the first air outlet channel.

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

[0021] In some embodiments, the handle and the shell are integrally formed.

[0022] In some embodiments, the handheld ultrasonic drill further comprises a damper, a guide, and a guide support, wherein,

[0023] the damper is fixed to the shell, and the movable end of the damper extends forward.

[0024] The guide is fixed to the shell and extends forward and parallel to the movable end of the damper;

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

[0026] Compared with the prior art, the handheld ultrasonic drill has the beneficial effects that:

[0027] The handheld ultrasonic drill has the center of gravity arranged in the projection column of the handle, so that the center of gravity of the handheld ultrasonic drill does not deviate from the holding position of the user when the user holds the handheld ultrasonic drill, the torque between the gravity of the handheld ultrasonic drill and the holding position of the user is greatly reduced, the handheld ultrasonic drill as a whole is more in line with human engineering mechanics, and the situation that the wrist is twisted when the user holds the ultrasonic drill with one hand is avoided, which is beneficial to realize one-handed holding of the handheld ultrasonic drill and solve the problem that the existing handheld ultrasonic drill is prone to causing fatigue of one-handed operation.

[0028] Moreover, the first air inlet channel, the second air inlet channel, the first air outlet channel and the second air outlet channel are any extended to the side of the speed reduction assembly, so that the speed reduction assembly can be cooled, the heat generation of the speed reduction assembly is reduced, and the working efficiency of the speed reduction assembly is improved.

[0029] Moreover, the first air outlet channel is used as part of the wiring channel, so that the wiring path of the handheld ultrasonic drill is more reasonable, and the structure of the handheld ultrasonic drill is more compact.

[0030] Moreover, the cooperation structure of the guide bracket, the damper and the guide is optimized, so that the cooperation structure of the guide bracket, the damper and the guide is more compact, the guide bracket is prevented from enlarging the radial dimension of the handheld ultrasonic drill, the volume of the handheld ultrasonic drill is prevented from being increased, the structure of the handheld ultrasonic drill is compact and light in weight in a comprehensive manner, one-handed operation of the handheld ultrasonic drill is realized, and the processing efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a schematic view of the handheld ultrasonic drill in the embodiment of the utility model;

[0032] Figure 2 is a schematic view of the projection column in the embodiment of the utility model;

[0033] Figure 3 is a sectional view of the handheld ultrasonic drill in the embodiment of the utility model;

[0034] Figure 4 isFigure 3 Enlarged view of middle A;

[0035] Figure 5 is a cross-sectional schematic view of the shell in the embodiment of the present application;

[0036] Figure 6 is another angle cross-sectional schematic view of the shell in the embodiment of the present application;

[0037] Figure 7 is another schematic view of the handheld ultrasonic drill in the embodiment of the present application;

[0038] Figure 8 is Figure 7 a cross-sectional schematic view of the structure shown.

[0039] In the figure, 100, handheld ultrasonic drill; 1, shell; 2, containing cavity; 3, drive unit; 3a, pneumatic motor; 3b, speed reducer; 4, ultrasonic transducer assembly; 4a, transducer housing; 4b, transducer; 5, handle; 5a, handle body; 5b, connecting part; 6, projection cylinder; 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 pressing ring; 21, wire passing channel; 22, start button; 23, damper; 24, guide; 25, guide bracket; 26, buffer pad; 27, cavity; 28, mounting inner shell; 29, air passing channel. DETAILED DESCRIPTION

[0040] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the present application, but not to limit the scope of the present application.

[0041] In the description of the present application, 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 "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0042] In the description of the utility model, it should be understood that the directions or positional relationships indicated by the terms "height", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like in the utility model are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model.

[0043] In the description of the utility model, it should be understood that the terms "first", "second" in the utility model are only used for description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features.

[0044] Embodiment

[0045] Reference Figures 1-8 One embodiment of the utility model provides a handheld ultrasonic drill 100, it includes the shell 1, the containing cavity 2 that is provided with the opening towards the front side in the shell 1, the drive unit 3 and the ultrasonic transducer assembly 4 that are arranged in order from the rear side to the front side are provided in the containing cavity 2;And, the shell 1 is provided with handle 5, and the gravity center of handheld ultrasonic drill 100 is in the projection cylinder 6 of handle 5, and the projection cylinder 6 is the cylinder that the horizontal projection of handle 5 extends along the vertical direction.

[0046] In the embodiment, define the side that drill bit 9 faces as front side / forward end when the handheld ultrasonic drill 100 is generally used, and the side opposite to it as rear side / rear end, and define the side that handle 5 is on as lower / underside / bottom when the handheld ultrasonic drill 100 is generally used, and the side opposite to it as upper / upper side / top.

[0047] It can be understood that the gravity center of the handheld ultrasonic drill 100 refers to the gravity center position of the handheld ultrasonic drill 100 when the drill bit 9 is not assembled. The weight of the handheld ultrasonic drill 100 is usually much greater than the weight of the drill bit 9, therefore, when the gravity center of the handheld ultrasonic drill 100 is in the projection cylinder 6 of handle 5, the gravity center position of the handheld ultrasonic drill 100 assembled with the drill bit 9 will not change greatly, and its gravity center is generally still in the projection cylinder 6 of 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 is a curved surface generated by taking the outer contour line of the horizontal projection of the handle 5 as the directrix and taking the vertical straight line, i.e., the straight line perpendicular to the horizontal plane, as the generatrix, and moving the generatrix along the directrix in parallel, i.e., the projection cylinder is a cylinder extending in the vertical direction along the horizontal projection of the handle.

[0049] It should be noted that the shell 1 and the handle 5 can be integrally formed or can be designed in a split manner, i.e., a detachable design. In the case where the shell 1 and the handle 5 are designed in a split manner, the horizontal projection of the handle 5 is the projection of the handle 5 detached from the shell 1 on the horizontal plane, and in the case where the shell 1 and the handle 5 are integrally formed, the horizontal projection of the handle 5 is the projection of the handle 5 region on the horizontal plane, which includes the projection of the connection position of the handle 5 and the shell 1 on the horizontal plane, i.e., the projection cylinder 6 is a cylinder extending in the vertical direction along the horizontal projection of the handle.

[0050] The center of gravity of the handheld ultrasonic drill 100 is arranged in the projection cylinder 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 distance between the center of gravity of the handheld ultrasonic drill 100 and the position of the handle 5, so that when the gravity of the handheld ultrasonic drill 100 acts on the handle 5, no or only a small torque is applied to the user's hand, and 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 pneumatic drill, the user can avoid the situation that the wrist is twisted when holding the ultrasonic drill with one hand by holding the handheld ultrasonic drill 100 through the handle 5, and the one-handed holding of the handheld ultrasonic drill 100 is realized. 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 one-handed holding by the user.

[0051] It can be understood that based on performance requirements, the handheld ultrasonic drill 100 will be configured with driving units 3 and ultrasonic transducer assemblies 4 of different models and different specifications, and the weights of the driving units 3 and the ultrasonic transducer assemblies 4 of different models and different specifications will be different. In order to enable the center of gravity of the handheld ultrasonic drill 100 to be located in the projection cylinder 6 of the handle 5, the position of the handle 5 can be arranged below the driving unit 3 and the ultrasonic transducer assembly 4, or only below the driving unit 3.

[0052] For example, the front end of the handle 5 extends below the ultrasonic transducer assembly 4, and the rear end of the handle 5 extends below the drive unit 3. In this way, the weight of the handle 5 on both sides can be balanced, and 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 uneven weight distribution of the handheld ultrasonic drill 100, thereby ensuring that the handheld ultrasonic drill 100 is labor-saving to operate, and the user experience is improved.

[0053] It should be noted that the handle 5 of the present example includes a handle body 5a and a connecting portion 5b for connecting the handle body 5a to the housing 1. Therefore, extending the front end of the handle 5 below the ultrasonic transducer assembly 4 and extending the rear end of the handle 5 below the drive unit 3 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 extends below the ultrasonic transducer assembly 4, and the rear end of the handle body 5a extends below the drive unit 3, or the front end of the connecting portion 5b extends below the ultrasonic transducer assembly 4, and the rear end of the connecting portion 5b extends below the drive unit 3.

[0054] Reference Figures 1-6 As an example of the present embodiment, the accommodation cavity 2 is a cylindrical space extending in the front-rear 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 horn 7, which extends out of the accommodation cavity 2 and is provided with a drill chuck 8 for mounting a drill bit 9. The drill chuck 8 can drive the drill bit 9 to rotate, so that the drill bit 9 performs drilling work. In the present example, the housing 1 and the handle 5 are integrally formed, and the transducer 4b assembly is also mounted in the housing 1, which can relatively improve the overall rigidity of the handheld ultrasonic drill 100.

[0055] The drive unit 3 includes a pneumatic motor 3a and a speed reducer 3b connected in sequence from the rear side to the front side. The speed reducer 3b is connected to the output end of the pneumatic motor 3a and is located on the front side of the pneumatic motor 3a. The pneumatic motor 3a serves as a drive assembly, which is connected to the outside of the housing 1 through a gas flow channel to introduce an external gas source. The output end of the pneumatic motor 3a can rotate relative to the housing 1 to output power, which is transmitted to the drill chuck 8 through the speed reducer 3b and the ultrasonic transducer assembly 4. When the pneumatic motor 3a outputs power, the drill chuck 8 rotates, thereby driving the drill bit 9 to rotate and perform drilling action.

[0056] The speed reducer 3b serves as a speed reduction assembly, which is mainly used to adjust the rotational speed of the pneumatic motor 3a. It 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 further description is given here.

[0057] The gas flow channel is located inside the housing 1 and the handle 5, thereby supplying airflow from an external air source to the pneumatic motor 3a. (Reference) Figures 1-6 As an example of the gas flow channel in this embodiment, the handle 5 is provided with a first air inlet channel 11 and a first air outlet channel 12 arranged at intervals, and the outer shell 1 is provided with a second air inlet channel 13 and a second air outlet channel 14. The second air inlet channel 13 and the second air outlet channel 14 are arranged at intervals relative to the receiving cavity 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 receiving cavity 2. 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 in this embodiment as an example, the receiving cavity 2 is a cylindrical space that houses the drive unit 3 and the ultrasonic transducer assembly 4. The second air inlet channel 13 and the second air outlet channel 14, which are located inside the outer shell, are not part of the receiving cavity 2. Of course, as gas channels, the second air inlet channel 13 and the second air outlet channel 14 need to have walls that guide the direction of gas flow. Therefore, in the handheld ultrasonic drill 100 of this embodiment, the second air inlet channel 13 and the second air outlet channel 14 share part of the wall with the receiving cavity 2.

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

[0060] By setting up a first air intake channel 11, a second air intake channel 13, a first air outlet channel 12, and a second air outlet channel 14, and arranging the second air intake channel 13 and the second air outlet channel 14 at intervals relative to the receiving cavity 2, and with at least one of the second air intake channel 13 and the second air outlet channel 14 extending to the reducer 3b, at least a portion of the airflow will circulate around the pneumatic motor 3a and the reducer 3b, so that the airflow driving the pneumatic motor 3a can be used as a cooling airflow to carry 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 in this embodiment is located at the rear end. Therefore, in some handheld ultrasonic drills 100, a third air inlet channel 10 is provided between the rear end of the drive unit 3 and the receiving cavity 2. Furthermore, 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 airflow can flow to the rear end of the pneumatic motor 3a, thereby achieving the purpose of removing the heat generated by the operation of the pneumatic motor 3a and the reducer 3b.

[0062] It is understood that the pneumatic motor 3a in this embodiment does not have an outer wall on the outer periphery of the blades. Therefore, the pneumatic motor 3a in this embodiment needs to be equipped with a cavity 27 so that the blades of the pneumatic motor 3a can fit into the inner wall of the receiving cavity 2. The cavity 27 is arranged on the periphery of the pneumatic motor 3a. The airflow flowing into the cavity 27 through the second air intake 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 located on the periphery. In this type of handheld ultrasonic drill 100, a third air inlet channel 10 is not required between the rear end of the drive unit 3 and the receiving cavity 2. Instead, a corresponding hole / channel is usually provided on the side wall of the second air inlet channel 13 near the pneumatic motor 3a to allow airflow to flow from the second air inlet channel 13 into the receiving cavity 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 a third air intake 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, if the pneumatic motor 3a has an outer wall that cooperates with the blade, there is no need to set a cavity 27 between the pneumatic motor 3a and the side wall of the receiving cavity 2. In this case, if the air inlet of the pneumatic motor 3a is set on the rear side, then a third air inlet channel 10 will be set between the rear end of the drive unit 3 and the receiving cavity 2. The airflow can flow sequentially 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 to cool the pneumatic motor 3a and the reducer 3b. In this type of handheld ultrasonic drill 100, the structure 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 is the same as that of the handheld ultrasonic drill 100 in this embodiment. Moreover, after the airflow passes through the third air inlet channel 10, it will enter the interior of the pneumatic motor and drive the pneumatic motor 3a to move. This will not be described in detail here. Of course, if the pneumatic motor 3a is not equipped with an outer wall that mates with the blade, then a cavity 27 needs to be provided between the pneumatic motor 3a and the side wall of the receiving cavity 2. In this case, if the air inlet of the pneumatic motor 3a is located 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 receiving cavity 2. This type of handheld ultrasonic drill 100 is configured as follows. Figures 1-6 The structure shown allows airflow to flow sequentially along the first intake channel 11, the second intake channel 13, the cavity 27, the third intake channel 10, the second exhaust channel 14, and the first exhaust channel 12, driving the pneumatic motor 3a to operate and cooling the pneumatic motor 3a and the reducer 3b.

[0065] It is important to note that the pneumatic motor 3a is not necessarily the only 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 sequentially 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, or sequentially 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, or sequentially 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, to cool the drive assembly and the reducer 3b. It is important to note that in this type of handheld ultrasonic drill 100, the airflow does not enter the interior of the electric motor, but flows on the outside of the electric motor to carry away the heat generated by the electric motor's operation.

[0066] It should be noted that, in order to install the drive unit 3 within the receiving cavity 2 and to divide the drive unit 3 into a second air intake channel 13 and a second air outlet channel 14 on both sides, a mounting inner shell 28 extending from the rear to the front is typically provided within the receiving cavity 2. The mounting inner shell 28 cooperates with the outer shell 1 to form the receiving cavity 2, that is, the mounting inner shell 28 serves as part of the sidewall forming the receiving cavity 2. The second air intake channel 13 and the second air outlet channel 14 are formed between the mounting inner shell 28 and the outer shell 1. To allow airflow to flow from the location of the pneumatic motor 3a into the second air outlet channel 14, an air passage 29 may be provided on the mounting inner shell 28. The air passage 29 connects the cavity 27 and the second air outlet channel 14.

[0067] It should be noted that the outer casing 1 does not necessarily contain an inner casing 28. In some handheld ultrasonic drills 100, the drive unit 3 has its own casing, which mates with the inner wall of the outer casing 1 for connection and fixation. In this type of handheld ultrasonic drill 100, the receiving cavity 2 is the entire internal space of the outer casing 1, and the second air inlet channel 13 and the second air outlet channel 14 are usually located inside the wall of the outer casing 1, so that the second air inlet channel 13 and the second air outlet channel 14 are arranged at intervals relative to the receiving cavity 2.

[0068] Based on the performance requirements of the handheld ultrasonic drill 100, the arrangement positions of the handle 5, the ultrasonic transducer assembly 4, and the drive unit 3 may be adjusted. In different models of the handheld ultrasonic drill 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 side-by-side arrangement. The relative positions between the first air inlet channel 11 and the first air outlet channel 12 are not strictly limited. The first air outlet channel 12 only needs to connect to the outside and be able to directly discharge gas. For example, the first air outlet channel 12 can be located in front of or behind the first air inlet channel 11; or, it can be located to the left or right of the first air inlet channel 11. Generally, placing the first air outlet channel 12 in front of the first air inlet channel 11 allows it to be closer to the ultrasonic transducer assembly 4, which is beneficial for the airflow to carry away the heat generated by the ultrasonic transducer assembly 4 during operation.

[0069] The second air intake 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. This allows airflow to 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. (Reference) Figures 1-6As an example of this embodiment, the second air intake channel 13 is disposed below the drive unit 3, and the second air outlet channel 14 is disposed above the drive unit 3. This helps to shorten the travel 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 located above the drive unit 3, since the first air outlet channel 12 is located inside the handle 5, and the handle 5 is located below the outer casing 1, this results in a certain distance between the first air outlet channel 12 and the second air outlet channel 14, making direct communication between them inconvenient. Therefore, other airflow channels can be provided inside the outer casing 1 to assist gas flow. (Reference) Figures 1-6 As an example of this embodiment, a third air outlet channel 15 is provided inside the housing 1. The third air outlet channel 15 is arranged around the drive unit 3 to connect the first air outlet channel 12 and the second air outlet channel 14. Depending on 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 exhaust channel 15 is an annular channel. After the gas flows into the third exhaust channel 15 from the second exhaust channel 14, it flows on the outer periphery of the drive unit 3, cooling the outer periphery of the drive unit 3. The handheld ultrasonic drill 100 of this embodiment will now be described with the third exhaust channel 15 surrounding the reducer 3b.

[0072] This 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 location of the reducer 3b in the drive unit 3. (Reference) Figures 1-6 As an example of this embodiment, the first air intake channel 11 extends below the reducer 3b of the drive unit 3 and communicates with the second air intake channel 13; and the first air outlet channel 12 extends below the reducer 3b of the drive unit 3 and communicates with the second air outlet channel 14. In this way, when gas flows in from the first air intake channel 11 and flows sequentially along the second air intake channel 13, the third air intake channel 10, the second air outlet channel 14, and the first air outlet channel 12, the gas is always near 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 may only have the first air intake channel 11 arranged below the drive unit 3, or only the first air outlet channel 12 arranged below the drive unit 3, as long as the heat generated by the drive unit 3 during operation can be carried away by the gas in time.

[0073] The receiving cavity 2 is equipped with an electrical transmission component that supplies power to the ultrasonic transducer assembly 4. This component can be located on the outside of the transducer housing 4a. The electrical transmission component can be a wireless transmission component or a brush assembly. (Reference)Figures 1-6 This embodiment uses a wireless transmission component for illustration. Specifically, the wireless transmission component includes a wireless receiving unit 16 and a wireless transmitting unit 17. Both the wireless receiving unit 16 and the wireless transmitting unit 17 surround the outer periphery of the transducer housing 4a, with the wireless receiving unit 16 positioned in front of the wireless transmitting unit 17. The output end of the reducer 3b is fixedly connected to the transducer housing 4a. From the rear to the front, a rear bearing 18, a wireless receiving unit 16, a front bearing 19, and a bearing pressure ring 20 are sequentially mounted on the outer periphery of the rear end of the transducer housing 4a. The rear bearing 18 is positioned between the rear end of the ultrasonic transducer assembly 4 and the outer shell 1. The wireless transmitting unit 17 is positioned between the rear bearing 18 and the wireless receiving unit 16 and is fitted onto the side wall of the outer shell 1.

[0074] The outer rings of both the front bearing 19 and the rear bearing 18 are fitted against the inner wall of the receiving cavity 2 to determine the relative position between the transducer housing 4a and the outer shell 1. Constrained by the front bearing 19 and the rear bearing 18, the transducer housing 4a can rotate around the central axis of the receiving cavity 2, preventing radial runout during rotation. Furthermore, the third exhaust channel 15 is located close to the rear bearing 18, allowing the airflow passing through the channel to 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 extra wiring channel outside the gas flow channel would undoubtedly increase the size of this handheld ultrasonic drill 100. Therefore, it is advisable to utilize the gas flow channel to arrange the wires of the electrical transmission component, so that the handheld ultrasonic drill 100 can form an integrated pneumatic and electrical structure.

[0076] refer to Figures 1-6 As an example of this embodiment, the handle 5 includes a connecting portion 5b for connecting to the housing 1. The front end of the connecting portion 5b extends below the ultrasonic transducer assembly 4, and the connecting 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 air outlet channel 12. By using the wire passage 21 for wiring, the wires are concealed in the gas flow channel, eliminating the need for additional wire channels inside the housing 1, saving space in the housing 1, and contributing to the compact structure of this handheld ultrasonic drill 100.

[0077] Through the cooperation of the drive unit 3 and the ultrasonic transducer assembly 4, the handheld ultrasonic drill 100 enables the drill bit 9 to vibrate at high frequency. Furthermore, utilizing the high-frequency vibrating drill bit 9, the handheld ultrasonic drill 100 can process difficult-to-machine materials such as carbon fiber braided tape, unidirectional tape, and other carbon fiber composite materials used in the aerospace industry, as well as Kevlar bulletproof materials. Of course, the handheld ultrasonic drill 100 can also be operated solely by the drive unit 3 to move the drill bit 9. Correspondingly, the handheld ultrasonic drill 100 can be equipped with a start button 22 to control the opening and closing of the ultrasonic transducer assembly 4. (Reference)Figures 1-6 As an example of this embodiment, the start button 22 is detachably connected to the handle 5, making it easy for the user to press the start button 22 when holding the handheld ultrasonic drill 100. The start button 22 is electrically connected to the wireless transmission unit 17 via the first air outlet channel 12 and the wire passage 21. In this way, the wires and air inlet pipes of the handheld ultrasonic drill 100 are led out from the lower end of the handle 5. Compared with the structure where the wires are led out from the top of the handheld drill, the wiring arrangement of the handheld ultrasonic drill 100 is simpler and the wiring is less prone to interference.

[0078] The front end of this handheld ultrasonic drill 100 can be equipped with a guide structure to guide the movement path of the drill bit 9. Furthermore, to prevent the user from operating the handheld ultrasonic drill 100 at excessively high speeds, a buffer device can be configured on the guide structure to ensure stable operation of the handheld ultrasonic drill 100. (Reference) Figures 7-8 As an example of this embodiment, the handheld ultrasonic drill 100 also includes a damper 23, a guide 24, and a guide bracket 25. An end cap is mounted on the front end of the outer casing 1, and a locking ring is fitted onto the front end of the end cap. The locking ring is fixed to the outer casing 1 or the end cap by fasteners such as screws. The damper 23 is mounted on the locking ring, thus connecting and fixing the damper 23 to the outer casing 1. The movable end of the damper 23 extends forward and is fixedly connected to the guide bracket 25. Furthermore, the damper 23 is positioned at the upper part of the outer casing 1 and can also be used to adjust the handheld ultrasonic drill. The center of gravity of drill 100; the guide member 24 is a rod-shaped structure, the rear end of the guide member 24 is locked between the locking ring and the end cap, so that the guide member 24 is connected and fixed to the outer shell 1, and the front end of the guide member 24 extends forward and passes through the guide bracket 25, and is parallel to the movable end of the damper 23; the guide bracket 25 is set at the front end of the outer shell 1, and the guide bracket 25 is slidably sleeved on the guide member 24. Specifically, the guide bracket 25 is connected to the movable end of the damper 23 and sleeved on the guide member 24, so as 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 making 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 towards the workpiece side with the handle 5. The guide member 24 moves towards the workpiece side through the sliding sleeve in the guide bracket 25. The damper 23 controls the forward movement speed of the handheld ultrasonic drill 100, thereby controlling the processing speed of the drill bit 9.

[0080] It should be noted that the damper 23, guide 24 and guide bracket 25 configured in this handheld ultrasonic drill 100 should be compatible with the structure of this handheld ultrasonic drill 100 so that after the damper 23, guide 24 and guide bracket 25 are configured in this handheld ultrasonic drill 100, 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 an amplitude transformer 7 to amplify the amplitude of the ultrasonic transducer assembly 4. The front end of the amplitude transformer 7 typically extends outside the receiving cavity 2 to facilitate 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 fit the amplitude transformer 7. For example, refer to... Figures 7-8 As an example of this embodiment, the guide bracket 25 is arranged around the amplitude transformer 7, and the guide bracket 25 is provided with a through hole for the drill bit 9 to pass through. Furthermore, there are three guide members 24 arranged around the through hole. Of course, in other handheld ultrasonic drills 100 equipped with guide brackets 25, the guide bracket 25 usually also has a channel for the drill bit 9 to pass through, thus facilitating the interaction between the guide bracket 25 and the drill bit 9.

[0082] In summary, the handheld ultrasonic drill 100 provided in this embodiment of the present invention places 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 shift from the user's holding position, which greatly reduces the torque between the weight of the handheld ultrasonic drill 100 and the user's holding position. This makes the handheld ultrasonic drill 100 more ergonomic and avoids wrist twisting when the user holds the ultrasonic drill with one hand. It is beneficial to realize one-handed holding of the handheld ultrasonic drill 100 and solves the problem that existing handheld ultrasonic drills 100 are prone to causing fatigue when operating with one hand.

[0083] Furthermore, the handheld ultrasonic drill 100 is equipped 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, with the second air inlet channel 13 and the second air outlet channel 14 arranged at intervals relative to the receiving cavity, and at least one of the second air inlet channel 13 and the second air outlet channel 14 extending to the deceleration assembly. In this way, at least part of the airflow will flow to the vicinity of the drive assembly and the deceleration assembly, thereby carrying away the heat generated by the operation of the drive assembly and the deceleration assembly to the outside, and preventing the heat generated by the operation of the drive assembly and the deceleration assembly from accumulating in the receiving cavity 2.

[0084] Furthermore, by setting up a wiring channel 21 and using the first air outlet channel 12 as part of the wiring channel, the wiring path of the handheld ultrasonic drill 100 is more reasonable, and the structure of the handheld ultrasonic drill 100 is more compact and small.

[0085] Furthermore, by optimizing the cooperative structure of the guide bracket 25, damper 23, and guide member 24, the handheld ultrasonic drill 100 achieves a more compact cooperative structure, preventing the guide bracket 25 from increasing the radial dimension of the handheld ultrasonic drill 100 and thus increasing its volume. Overall, this results in a compact and lightweight handheld ultrasonic drill 100, enabling single-handed operation and improving processing efficiency.

[0086] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A hand-held ultrasonic drill, characterized in that, The hand-held ultrasonic drill comprises a shell, a containing cavity arranged in the shell, a drive unit and an ultrasonic transducer assembly arranged in the containing cavity from rear to front, wherein the drive unit comprises a reduction assembly and a drive assembly arranged from front to rear. The hand-held ultrasonic drill further comprises a handle, and a gravity center of the hand-held ultrasonic drill is arranged in a projection cylinder of the handle.

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

3. The hand-held ultrasonic drill according to claim 1 or 2, characterized in that The handle comprises a connecting part for connecting with the shell, a front end of the connecting part extends to below the ultrasonic transducer assembly, and a rear end of the connecting part extends to below the drive unit.

4. The hand-held ultrasonic drill of claim 1, wherein, The drive assembly is provided with a cavity between the drive assembly and a side wall of the containing cavity, and The handle is provided with a first air inlet channel and a first air outlet channel arranged at intervals, 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 containing 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 sequentially communicated.

5. The hand-held ultrasonic drill of claim 4, wherein, The first air inlet channel extends to below the reduction assembly and is communicated with the second air inlet channel; and / or The first air outlet channel extends to below the reduction assembly and is communicated with the second air outlet channel; and / or The second air inlet channel extends to a side of the reduction assembly and is communicated with the first air inlet channel; and / or The second air outlet channel extends to a side of the reduction assembly and is communicated with the first air outlet channel.

6. The hand-held ultrasonic drill of claim 4, wherein, The shell is provided with a third air outlet channel, the third air outlet channel is arranged around the reduction assembly and is communicated with the first air outlet channel and the second air outlet channel.

7. The hand-held ultrasonic drill of claim 4, wherein, The second air inlet channel is arranged below the drive unit, and the second air outlet channel is arranged above the drive unit.

8. The hand-held ultrasonic drill of claim 4, wherein, The containing cavity is further provided with an electric transmission assembly arranged around the ultrasonic transducer assembly, the handle comprises a connecting part for connecting with the shell, a front end of the connecting part extends to below the ultrasonic transducer assembly, and The connecting part is provided with a wire passing channel, one end of the wire passing channel is communicated with the electric transmission assembly, and the other end of the wire passing channel is communicated with the first air outlet channel.

9. The hand-held ultrasonic drill of claim 8, wherein, The handle is provided with a start button, the start button is electrically connected with the ultrasonic transducer assembly through the first air outlet channel, the wire passing channel and the ultrasonic transducer assembly, and the start button is detachably connected with the handle.

10. The hand-held ultrasonic drill of claim 1, wherein, The handle and the shell are integrally formed.

11. The hand-held ultrasonic drill of claim 1 wherein, The hand-held ultrasonic drill further comprises a damper, a guide and a guide support, wherein The damper is fixed to the shell, and a movable end of the damper extends forward; The guide is fixed to the shell, and the guide extends forward and is parallel to the movable end of the damper; The guide support is arranged at a front end of the shell, the guide support is connected to the movable end of the damper, and the guide support is slidably sleeved on the guide.

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