Backflow prevention power handle

Abstract

The utility model discloses an anti-backflow power handle which comprises an installation assembly, a driving mechanism and an air pressure adjusting assembly, and an installation cavity is formed in the installation assembly. The driving mechanism comprises a driving assembly, a clamping assembly and a grinding piece, the driving assembly and the clamping assembly are both mounted in the mounting cavity, the driving assembly is connected with the clamping assembly, and the clamping assembly is used for clamping the grinding piece and can be driven by the driving assembly to drive the grinding piece to rotate; the air pressure adjusting assembly comprises a ventilation part and an air blowing part, the ventilation part is arranged on the installation assembly and communicates between the installation cavity and the external environment of the installation assembly, the air blowing part is installed in the installation cavity and comprises an air inlet side and an air outlet side, and the ventilation part is located between the driving assembly and the air inlet side. The anti-backflow power handle solves the problem that liquid such as blood and body fluid easily flows to an inner cavity of the handle in the high-speed running process of a grinding head of the anti-backflow power handle.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a backflow prevention power handle. BACKGROUND

[0002] A medical power handle is a device that uses a high-speed motor to drive a rotating chuck to perform operations such as polishing, planing, and boring on a surgical site (e.g., a spine, a bone, etc.) by clamping different grinding heads. The power handle generally includes a clamping component for clamping a grinding head and a power component installed in the inner cavity of the handle, etc. The power component can drive the grinding head clamped by the clamping component to rotate at high speed.

[0003] During the high-speed operation of the grinding head of the power handle, blood, body fluid, and other liquids tend to flow into the inner cavity of the handle, i.e., backflow. These liquids can contaminate and even damage the power component in the inner cavity, resulting in a high maintenance rate. CONTENT OF THE UTILITY MODEL

[0004] The main purpose of the present application is to provide a backflow prevention power handle to solve the problem that during the high-speed operation of the grinding head of the power handle in the background art, blood, body fluid, and other liquids tend to flow into the inner cavity of the handle.

[0005] According to one aspect of the present application, a backflow prevention power handle is provided, comprising:

[0006] An installation assembly, wherein an installation cavity is arranged in the installation assembly;

[0007] A driving mechanism, wherein the driving mechanism comprises a driving assembly, a clamping assembly, and a grinding piece, the driving assembly and the clamping assembly are both installed in the installation cavity, the driving assembly is connected with the clamping assembly, and the clamping assembly is used for clamping the grinding piece and can drive the grinding piece to rotate under the driving of the driving assembly;

[0008] An air pressure adjusting assembly, wherein the air pressure adjusting assembly comprises a ventilation component and a blowing component, the ventilation component is arranged in the installation assembly and is connected between the installation cavity and the external environment of the installation assembly, the blowing component is installed in the installation cavity, the blowing component comprises an air inlet side and an air outlet side, and the ventilation component is located between the driving assembly and the air inlet side.

[0009] Further, the ventilation component comprises:

[0010] A first flow guide channel, wherein the first flow guide channel is arranged in the installation assembly, and the first flow guide channel is connected with one side of the installation cavity close to the driving assembly;

[0011] A second flow channel is arranged in the mounting assembly and connected with the mounting cavity, and the second flow channel is located between the first flow channel and the air inlet side.

[0012] Further, the mounting cavity comprises a first through hole, a second through hole and a third through hole, and the mounting assembly comprises:

[0013] A first housing component, the first through hole is arranged in the first housing component, and the driving assembly is mounted in the first through hole;

[0014] A mounting component connected with the first housing component, the second through hole is arranged in the mounting component and communicates with the first through hole;

[0015] A second housing component connected with the mounting component away from the first housing component, the third through hole is arranged in the second housing component and communicates with the second through hole, and the clamping assembly is mounted in the second through hole and the third through hole and connected with the driving assembly;

[0016] Wherein, the first flow channel is arranged in the mounting component and communicates with the second through hole, and the second flow channel is arranged in the second housing component and communicates with the third through hole.

[0017] Further, the first flow channel comprises a first air hole and a first gap, and the mounting component comprises:

[0018] A rotating sleeve mounted between the first housing component and the second housing component, the second through hole is arranged in the rotating sleeve, and the first air hole is arranged through the side wall of the rotating sleeve and communicates with the second through hole;

[0019] A knob sleeved outside the rotating sleeve and rotatable relative to the rotating sleeve around the axis of the rotating sleeve, and the first gap is formed between the knob and the first housing component and the rotating sleeve, and the first gap communicates with the first air hole.

[0020] Further, the first air hole comprises a plurality of first air holes, and the plurality of first air holes are arranged in the rotating sleeve close to the first housing component along the circumference of the rotating sleeve.

[0021] Further, the third through hole comprises a first hole section and a second hole section, and the second housing component comprises:

[0022] A first shell connected to the mounting component away from the first housing component, the first hole segment is arranged in the first shell and communicates with the second through hole, and the second flow guide channel is arranged in the side wall of the first shell and communicates with the side of the first hole segment close to the second through hole;

[0023] A second shell connected to the first shell away from the mounting component, the second hole segment is arranged in the second shell and communicates with the first hole segment.

[0024] Further, the second flow guide channel includes an inclined hole, along the axial direction of the first hole segment, the inclined hole is inclined away from the mounting component.

[0025] Further, the first included angle between the central axis of the inclined hole and the central axis of the first hole segment is between 55 degrees and 65 degrees; and / or, the inclined hole includes a plurality of, along the circumferential direction of the first hole segment, a plurality of the inclined holes are arranged in the side wall of the first shell.

[0026] Further, the clamping assembly includes a clamping body connected to the driving assembly, the blowing component is located on the side of the third through hole away from the mounting component, and the blowing component includes:

[0027] Mounting part;

[0028] Fan blade, the fan blade includes a plurality of, along the axial direction of the third through hole, a plurality of the fan blades are spaced apart and mounted on the end of the clamping body away from the driving assembly through the mounting part.

[0029] Further, the mounting part includes a mounting sleeve, a fourth through hole is arranged in the mounting sleeve along the axial direction of the clamping body, and the fan blade is arranged on the outer surface of the mounting sleeve away from the fourth through hole along the radial direction of the clamping body, and the clamping body includes:

[0030] Second transmission shaft connected to the driving assembly;

[0031] Transmission sleeve connected to the second transmission shaft away from the driving assembly, the side of the transmission sleeve away from the second transmission shaft is matched with the fourth through hole and is sleeved in the fourth through hole.

[0032] In this application, the anti-backflow power handle includes a mounting assembly, a drive mechanism, and a pneumatic adjustment assembly. The drive mechanism includes a drive assembly, a clamping assembly, and a grinding piece. Both the drive assembly and the clamping assembly are installed within the mounting cavity of the mounting assembly. The drive assembly is connected to the clamping assembly, which clamps the grinding piece and can rotate it under the drive of the drive assembly. During the rotation of the grinding piece on the clamping assembly driven by the drive assembly, a negative pressure is formed in the mounting cavity of the anti-backflow power handle. Liquids such as blood and body fluids tend to flow into the mounting cavity under this negative pressure. To prevent liquids from flowing back into the mounting cavity, the anti-backflow power handle of this application also includes a pneumatic adjustment assembly. The air pressure regulating component includes a ventilation component and an air blowing component. The ventilation component is located within the mounting component and connects the mounting cavity to the external environment. When negative pressure is generated within the mounting cavity, the ventilation component can introduce airflow from the external environment into the mounting cavity to counteract the negative pressure. The air blowing component is installed within the mounting cavity and includes an inlet side and an outlet side. The ventilation component is located between the drive component and the inlet side. Thus, while connecting the mounting cavity to the external environment through the ventilation component, the air blowing component accelerates the flow rate of external airflow through the ventilation component into the mounting cavity, thereby quickly eliminating negative pressure and ensuring that the air pressure within the mounting cavity is not less than the atmospheric pressure of the external environment. This prevents liquid from flowing back into the mounting cavity along the gap between the grinding part and the mounting component, thus avoiding contamination or even damage to the drive component and clamping component within the mounting cavity by liquid during the surgical procedure. This improves the service life of the drive component and clamping component and significantly reduces the maintenance rate. Attached Figure Description

[0033] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0034] Figure 1 This is a schematic diagram of the anti-backflow power handle disclosed in this application;

[0035] Figure 2 for Figure 1 A schematic diagram of the structure after removing the knob;

[0036] Figure 3 Top view of the power handle to prevent backflow;

[0037] Figure 4 for Figure 3 AA section view;

[0038] Figure 5 for Figure 4 Enlarged schematic diagram of part B;

[0039] Figure 6 for Figure 4An enlarged schematic view of the middle C portion;

[0040] Figure 7 A structural schematic view of the blowing component;

[0041] Figure 8 A structural schematic view of the straight machine type handle;

[0042] Figure 9 A Figure 8 D-D sectional view.

[0043] Wherein, the above drawings include the following reference signs:

[0044] 10, mounting assembly; 101, mounting cavity; 1011, first through hole; 1012, second through hole; 1013, third through hole; 11, first housing component; 12, mounting component; 121, rotating sleeve; 1211, guide hole; 122, knob; 123, limiting piece; 13, second housing component; 131, first outer shell; 132, first hole section; 133, second outer shell; 134, second hole section; 20, driving assembly; 21, connecting rod; 22, first transmission shaft; 23, gear transmission component; 30, clamping assembly; 31, clamping body; 310, clamping hole; 311, second transmission shaft; 312, transmission sleeve; 32, abutting piece; 33, sleeve; 331, limiting protrusion; 34, first elastic piece; 40, grinding piece; 50, air pressure adjusting assembly; 51, first flow guide channel; 511, first air hole; 512, first gap; 52, second flow guide channel; 521, inclined hole; 53, blowing component; 531, mounting sleeve; 5311, fourth through hole; 532, fan blade. DETAILED DESCRIPTION

[0045] It should be noted that the embodiments and features in the embodiments in the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with embodiments.

[0046] It should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form, unless the context clearly indicates otherwise, and it should also be understood that, when the terms "comprise" and / or "include" are used in the specification, there is a presence of a feature, step, operation, device, component and / or combination thereof.

[0047] The relative arrangement of parts and steps, numerical expressions, and numerical values set forth in the examples herein are not intended to limit the scope of the present application unless specifically stated otherwise. It is to be understood that the actual dimensions of the various parts shown in the drawings are not necessarily to scale. Techniques, methods, and devices known to those of ordinary skill in the relevant art can not be discussed in detail - but should be considered as if discussed in detail herein. In all examples shown and discussed herein, any specific values are to be interpreted as merely exemplary and not limiting. Other examples of exemplary embodiments can have different values. It is noted that like numbers and letters on the figures identify like parts throughout the several figures, and that, where possible, like reference numerals are used throughout the several figures, and that, where possible, like reference numerals are used throughout the several figures, and that, where possible, further discussion of a part, which has been discussed in relation to one figure, is not necessary in relation to subsequent figures.

[0048] The existing anti-reflux power handle is prone to cause blood, body fluid and other liquids to flow back to the inner cavity of the handle, thereby polluting and even damaging the power components. In view of this, the inventor of the present application has found through in-depth research that, in the process of high-speed operation of the grinding head of the anti-reflux power handle, negative pressure is formed in the inner cavity of the handle, causing blood, body fluid and other liquids to flow to the inner cavity of the handle under the action of the negative pressure, that is, causing backflow. In order to solve the problem that blood, body fluid and other liquids are prone to flow to the inner cavity of the handle, the present application provides an anti-reflux power handle, please see Figures 1 to 9 The anti-reflux power handle comprises a mounting assembly 10, a driving mechanism and a gas pressure adjusting assembly 50, and the mounting assembly 10 is provided with a mounting cavity 101.

[0049] As shown in Figure 4 The driving mechanism comprises a driving assembly 20, a clamping assembly 30 and a grinding piece 40. The driving assembly 20 and the clamping assembly 30 are both mounted in the mounting cavity 101. The driving assembly 20 is connected with the clamping assembly 30, and the clamping assembly 30 is used for clamping the grinding piece 40 and can drive the grinding piece 40 to rotate under the driving of the driving assembly 20. The anti-reflux power handle in the embodiment can be one of a bending machine type handle and a straight machine type handle. The bending machine type handle is a handle with a bending structure at the handle section where the driving assembly 20 is located, and the bending machine type handle can be used in cooperation with an endoscope to be inserted into a human body at a to-be-operated site. The straight machine type handle can be directly inserted into the human body for operation. As shown in Figures 1 to 7 When the anti-reflux power handle is a bending machine type handle, the driving assembly 20 can comprise a connecting rod 21, a first transmission shaft 22 and a gear transmission part 23, and one end of the connecting rod 21 is connected with the first transmission shaft 22. The first transmission shaft 22 is connected with the clamping assembly 30 through the gear transmission part 23. The connecting rod 21 can be connected with the output shaft of the motor, so as to drive the first transmission shaft 22 to rotate around the axis thereof under the driving of the motor. The gear transmission part 23 is used for transmitting the rotary kinetic energy of the first transmission shaft 22 to the clamping assembly 30, so as to drive the clamping assembly 30 to rotate. As shown inFigure 8 and Figure 9 As shown in FIG. 1, when the backflow prevention power handle is a straight handle, the gear transmission part 23 can be omitted, and the first transmission shaft 22 and the clamping assembly 30 can be directly connected together.

[0050] The air pressure adjusting assembly 50 includes a venting part and a blowing part 53. The venting part is arranged on the mounting assembly 10 and is communicated between the mounting cavity 101 and the external environment of the mounting assembly 10. When a negative pressure is generated in the mounting cavity 101, the venting part can guide the external airflow into the mounting cavity 101 to offset the negative pressure. The blowing part 53 is arranged in the mounting cavity 101. The blowing part 53 includes an air inlet side and an air outlet side, and the venting part is located between the driving assembly 20 and the air inlet side. The blowing part 53 not only can accelerate the flow rate of the airflow guided into the mounting cavity 101 by the venting part, thereby quickly eliminating the negative pressure environment in the mounting cavity 101, but also can blow the liquid away from the driving assembly 20, thereby further ensuring that the liquid will not flow back.

[0051] It can be seen that, in the embodiment, the anti-backflow power handle comprises the mounting assembly 10, the driving mechanism and the air pressure adjusting assembly 50, the driving mechanism comprises the driving assembly 20, the clamping assembly 30 and the grinding piece 40, the driving assembly 20 and the clamping assembly 30 are both mounted in the mounting cavity 101 of the mounting assembly 10, the driving assembly 20 is connected with the clamping assembly 30, the clamping assembly 30 is used for clamping the grinding piece 40 and can drive the grinding piece 40 to rotate under the driving of the driving assembly 20. In the process of driving the grinding piece 40 on the clamping assembly 30 to rotate by the driving assembly 20, negative pressure will be formed in the mounting cavity 101 of the anti-backflow power handle, and blood, body fluid and other liquids are easy to flow to the mounting cavity 101 under the action of the negative pressure. To avoid the backflow of the liquids to the mounting cavity 101, the anti-backflow power handle of the embodiment is further provided with the air pressure adjusting assembly 50. The air pressure adjusting assembly 50 comprises the air passage component and the air blowing component 53, the air passage component is arranged on the mounting assembly 10 and is communicated between the mounting cavity 101 and the external environment of the mounting assembly 10, when negative pressure is generated in the mounting cavity 101, the air passage component can guide the airflow of the external environment into the mounting cavity 101 to offset the negative pressure, the air blowing component 53 is mounted in the mounting cavity 101, the air blowing component 53 comprises the air inlet side and the air outlet side, and the air passage component is located between the driving assembly 20 and the air inlet side. Thus, while the mounting cavity 101 and the external environment are communicated through the air passage component, the flow rate of the external airflow guided into the mounting cavity 101 through the air passage component can be accelerated through the air blowing component 53, so as to quickly eliminate the negative pressure, so that the air pressure in the mounting cavity 101 is not less than the atmospheric pressure of the external environment, so that the liquids will not backflow to the mounting cavity 101 through the gap between the grinding piece 40 and the mounting assembly 10, thereby avoiding the pollution and even damage of the liquids to the driving assembly 20, the clamping assembly 30 and the like in the mounting cavity 101 in the process of the operation, the service life of the driving assembly 20 and the clamping assembly 30 can be improved, and the maintenance rate is greatly reduced.

[0052] The venting component can be a device such as a venting pipe connected with the mounting assembly 10, but in order to reduce the assembly difficulty of the backflow prevention power handle, the venting component in the embodiment includes a first flow guide channel 51 and a second flow guide channel 52. The first flow guide channel 51 is arranged in the mounting assembly 10 and is in communication with the side of the mounting cavity 101 close to the driving assembly 20. The second flow guide channel 52 is arranged in the mounting assembly 10 and is connected with the mounting cavity 101, and is located between the first flow guide channel 51 and the air inlet side. In the embodiment, the corresponding first flow guide channel 51 and second flow guide channel 52 are directly arranged in the mounting assembly 10, without the need to increase additional pipe devices to connect the external environment with the mounting cavity 101, so that the assembly difficulty is low and the cost is low. Moreover, the first flow guide channel 51 can timely guide the airflow of the external environment to the side of the mounting cavity 101 close to the driving assembly 20, so as to avoid the liquid backflow at the driving assembly 20. The second flow guide channel 52 is arranged between the first flow guide channel 51 and the air inlet side of the air blowing component 53, and can guide the external airflow to the side of the mounting cavity 101 away from the driving assembly 20 through the first flow guide channel 51, so as to improve the filling efficiency of the mounting cavity 101 by the airflow.

[0053] The clamping assembly 30 has a first state of clamping the grinding piece 40 and a second state of loosening the grinding piece 40. Specifically, the clamping assembly 30 in the embodiment includes a clamping body 31, an abutting piece 32, and a pressing component. The clamping body 31 is connected with the driving assembly 20, and the clamping body 31 is provided with a clamping hole 310, the axial direction of the clamping hole 310 is parallel to the axial direction of the third through hole 1013, and at least part of the grinding piece 40 can be arranged in the clamping hole 310. The abutting piece 32 is connected with the clamping body 31 and can reciprocate along the radial direction of the third through hole 1013. The pressing component is sleeved on the outside of the clamping body 31, is located between the air blowing component 53 and the driving assembly 20, and can reciprocate along the axial direction of the third through hole 1013 relative to the clamping body 31, and the pressing component can be moved to contact the abutting piece 32 to make the abutting piece 32 abut the grinding piece 40 in the clamping hole 310. The pressing component includes a sleeve 33 and a first elastic piece 34, the sleeve 33 is sleeved on the clamping body 31 and can move along the axial direction of the sleeve 33 relative to the clamping body 31. The first elastic piece 34 includes a plurality of disc springs, the plurality of disc springs are stacked along the axial direction of the sleeve 33 and are sleeved on the clamping body 31, the plurality of disc springs have a compression state of elastic deformation and are abutted between the sleeve 33 and the driving assembly 20 to apply a force to the sleeve 33 to move towards the abutting piece 32. The first elastic piece 34 can also be a compression spring. The abutting piece 32 is arranged on the clamping body 31 and is located on the side of the sleeve 33 away from the first elastic piece 34, the first elastic piece 34 can push the sleeve 33 to move to contact the abutting piece 32, so that the abutting piece 32 moves along the radial direction of the sleeve 33 towards the inside of the clamping body 31 to abut the grinding piece 40, thereby clamping the side of the grinding piece 40 close to the clamping body 31 in the clamping hole 310, and the sleeve 33 can be moved away from the abutting piece 32 to separate from the abutting piece 32 under the adjustment of the mounting component 12, thereby loosening the grinding piece 40 so that the grinding piece 40 can be taken out of the clamping hole 310.

[0054] As Figure 5As shown, the clamping body 31 in the embodiment includes a second transmission shaft 311 and a transmission sleeve 312. The second transmission shaft 311 is connected with the driving assembly 20, and the transmission sleeve 312 is connected with the second transmission shaft 311. The clamping hole 310 is arranged in the transmission sleeve 312 along the axial direction of the second transmission shaft 311. A plurality of holes are arranged in the side wall of the transmission sleeve 312 along the radial direction of the second transmission shaft 311, and the plurality of holes are arranged in the circumferential direction of the transmission shaft and are in communication with the clamping hole 310. The abutting piece 32 is a column body matched with the holes. The column body is arranged in the holes and can move reciprocatingly along the radial direction of the transmission shaft. When the grinding piece 40 is located in the clamping hole 310, the side of the column body away from the grinding piece 40 is outside the holes and abuts against the inner wall surface of the sleeve 33. The inner surface of the sleeve 33 near the abutting piece 32 is provided with an inner tapered surface, and the diameter of the inner tapered surface gradually increases in the direction away from the driving assembly 20. One end of the column body near the inner tapered surface is provided with an outer tapered surface, and the length of the outer tapered surface along the radial direction of the column body gradually decreases in the direction away from the clamping hole 310. The sleeve 33 is pushed by the elastic force of the disc spring to make the inner tapered surface of the sleeve 33 abut against the outer tapered surface of the column body, so that the first state is reached to clamp the grinding piece 40. The sleeve 33 can be compressed by an external force (such as the pushing force applied by the mounting component 12) to move in the direction away from the abutting piece 32 to separate the inner tapered surface from the outer tapered surface, so that the second state is reached to loosen the grinding piece 40.

[0055] The mounting cavity 101 in the embodiment includes a first through hole 1011, a second through hole 1012 and a third through hole 1013. The mounting assembly 10 includes a first shell component 11, a mounting component 12 and a second shell component 13. The first through hole 1011 is arranged in the first shell component 11, the driving assembly 20 is mounted in the first through hole 1011, and the mounting component 12 is connected with the first shell component 11. The second through hole 1012 is arranged in the mounting component 12 and is in communication with the first through hole 1011. The second shell component 13 is connected with the side of the mounting component 12 away from the first shell component 11, the third through hole 1013 is arranged in the second shell component 13 and is in communication with the second through hole 1012, and the clamping assembly 30 is mounted in the second through hole 1012 and the third through hole 1013 and is connected with the driving assembly 20. The mounting component 12 is used to adjust the clamping assembly 30 reciprocatingly between the first state and the second state. The specific adjustment mode is to drive the sleeve 33 to move along the axial direction of the second through hole 1012 to move close to or away from the abutting piece 32. In the embodiment, the first flow channel 51 is arranged in the mounting component 12 and is in communication with the second through hole 1012, and the second flow channel 52 is arranged in the second shell component 13 and is in communication with the third through hole 1013. Not only does this make the machining of the first flow channel 51 and the second flow channel 52 more convenient, but also the arrangement of the vent component is realized at the same time when the mounting assembly 10 is assembled, which is efficient and convenient for assembly and makes the overall structure of the anti-backflow power handle compact and reliable.

[0056] The first flow channel 51 comprises a first air hole 511 and a first gap 512. The mounting component 12 in the embodiment comprises a rotating sleeve 121 and a knob 122. The rotating sleeve 121 is mounted between the first housing component 11 and the second housing component 13. The rotating sleeve 121 can be connected to the first housing component 11 and the second housing component 13 in a threaded manner, which is convenient and stable in structure. The second through hole 1012 is arranged in the rotating sleeve 121 to provide sufficient space for mounting the clamping assembly 30. The first air hole 511 is arranged in the sidewall of the rotating sleeve 121 and communicates with the second through hole 1012. The sidewall of the rotating sleeve 121 is further provided with a guide hole 1211 that communicates with the second through hole 1012. As shown in Figure 2 The guide hole 1211 extends in a spiral manner. The mounting component 12 further comprises a rolling element and a limiting element 123. The knob 122 is sleeved on the outside of the rotating sleeve 121 and can rotate relative to the rotating sleeve 121 about the axis of the rotating sleeve 121. The knob 122 has the first gap 512 with the first housing component 11 and the rotating sleeve 121. The first gap 512 communicates with the first air hole 511 to form the first flow channel 51, thereby realizing the communication between the mounting cavity 101 and the external environment through the first flow channel 51.

[0057] The rolling element is located in the guide hole 1211, and the limiting element 123 is arranged between the clamping assembly 30 and the rolling element and can move along the axial direction of the second through hole 1012. The limiting element 123 has a first position at which the clamping assembly 30 is located in the first state and a second position at which the clamping assembly 30 is located in the second state. The knob 122 drives the rolling element to move the limiting element 123 between the first position and the second position. Thus, the first air hole 511 is arranged in the rotating sleeve 121, and the knob 122 has the first gap 512 with the first housing component 11 and the rotating sleeve 121 when the knob 122 is mounted, which is convenient to process and can obtain the corresponding first flow channel 51 at the same time of assembling the mounting component 12.

[0058] The rolling element in the embodiment can be a steel ball. As shown in Figure 5As shown, the limiting member 123 is a sleeve ring sleeved on the sleeve 33, the sleeve ring is provided with a first sliding groove close to the surface of the steel ball, the first sliding groove extends along the circumference of the sleeve ring, the inner wall surface of the knob 122 is provided with a second sliding groove, the length of the second sliding groove extends along the axial direction of the sleeve ring, the steel ball passes through the guide hole 1211 and is movably embedded in the first sliding groove and the second sliding groove. The sleeve 33 is provided with a limiting protrusion 331 close to one end of the disc spring, and the sleeve ring is located on the side away from the disc spring. The steel ball moves in the axial direction in the second sliding groove, and moves in the circumferential direction in the first sliding groove through the guidance of the guide hole 1211. In the process of the circumferential rotation of the external knob 122, the sleeve ring is driven to move in the axial direction of the sleeve ring by the steel ball, and when the sleeve ring abuts against the limiting protrusion 331, the sleeve 33 is driven to move away from the abutting member 32, so as to conveniently loosen and remove the grinding member 40. When the sleeve 33 abuts against the abutting member 32 under the abutment of the disc spring to clamp the grinding member 40, a gap not less than 0.02 mm (such as a gap of 0.02 mm, 0.03 mm, etc.) can be reserved between the sleeve ring and the limiting protrusion 331 along the axial direction of the sleeve 33, so that the sleeve 33 cannot rotate with the clamping body 31.

[0059] The first air holes 511 in the embodiment include a plurality of first air holes 511 arranged at intervals on the side of the rotating sleeve 121 close to the first housing component 11 along the circumferential direction of the rotating sleeve 121. Thus, the mounting cavity 101 is communicated with the external environment through the plurality of first air holes 511 at the same time, and the negative pressure in the mounting cavity 101 is more efficiently offset.

[0060] The third through hole 1013 in the embodiment includes a first hole section 132 and a second hole section 134. The second shell component 13 includes a first shell 131 and a second shell 133. The first shell 131 is connected to the mounting component 12 away from the first shell component 11, the first hole section 132 is arranged in the first shell 131 and communicates with the second through hole 1012, and the second flow guide channel 52 is arranged in the side wall of the first shell 131 and communicates with the side of the first hole section 132 close to the second through hole 1012. The second shell 133 is connected to the first shell 131 away from the mounting component 12, the second hole section 134 is arranged in the second shell 133 and communicates with the first hole section 132, and the second hole section 134 is provided for the grinding piece 40 to pass through the clamping hole 310. Specifically, the first shell 131 can be threadedly connected to the end of the rotating sleeve 121 of the mounting component 12 away from the first shell component 11, which is convenient and firm to assemble. In the embodiment, the second flow guide channel 52 is arranged in the side wall of the first shell 131, which can ensure that the second flow guide channel 52 communicates with the mounting cavity 101 when the second shell component 13 is assembled, thereby improving the efficiency of assembly. Moreover, since the second flow guide channel 52 is located between the first flow guide channel 51 and the air inlet side, the first flow guide channel 51 and the second flow guide channel 52 can accelerate the external airflow to be guided to the mounting cavity 101 more efficiently and quickly, thereby effectively offsetting the negative pressure environment of the mounting cavity 101. When part of the liquid flows along the inner wall surface of the second shell component 13 to the second flow guide channel 52, the liquid can be discharged from the mounting cavity 101 through the second flow guide channel 52, thereby further improving the reliability and stability of the driving assembly 20 and the clamping assembly 30 in the mounting cavity 101.

[0061] The second flow guide channel 52 includes an inclined hole 521, which is inclined away from the mounting component 12 along the axis of the first hole section 132. Thus, during high-speed rotation of the grinding piece 40, the liquid agitated along the inner wall surface of the second shell component 13 (i.e., the inner wall surface of the first hole section and the second hole section 134) flowing toward the driving assembly 20 will be discharged by the inclined hole 521. Since the inclined hole 521 is inclined away from the mounting component 12, the liquid entering the inclined hole 521 can be discharged and dripped to the outside of the anti-backflow power handle under the action of gravity during downward work of the grinding piece 40, thereby achieving better liquid discharge effect.

[0062] The first angle between the central axis of the inclined hole 521 and the central axis of the first hole section 132 is greater than 0° and less than 90°. Figure 5The first included angle is between 55 degrees and 65 degrees. The first included angle can specifically include one of 55 degrees, 56 degrees, 57 degrees, 58 degrees, 59 degrees, 60 degrees, 61 degrees, 62 degrees, 63 degrees, 64 degrees, 65 degrees, and other decimal angle values between 55 degrees and 65 degrees. Thus, by setting the size of the first included angle within the above range of angle values, the embodiment ensures that the inclined hole 521 can more conveniently and quickly discharge the liquid, further improving the liquid discharge effect of the second flow channel 52. The first included angle in the embodiment can be preferably 60 degrees.

[0063] The inclined hole 521 includes a plurality of, for example, Figure 2 As shown, along the circumference of the first hole section 132, the plurality of inclined holes 521 are arranged at intervals in the side wall of the first outer shell 131. Thus, the inclined hole 521 is arranged in the side wall of the first outer shell 131, which is not only convenient to process, but also can improve the liquid discharge effect and efficiency by arranging a plurality of inclined holes 521 along the circumference of the first hole section 132, avoiding the backflow of the liquid along the inner wall surface of the first outer shell 131 into the rotating sleeve 121 of the mounting component 12.

[0064] The clamping assembly 30 includes a clamping body 31 connected with the driving assembly 20, and the clamping body 31 is used to clamp the grinding piece 40, for example, Figure 5 and Figure 7 As shown, the air blowing component 53 is located on the side of the third through hole 1013 away from the mounting component 12, specifically in the second hole section 134 of the third through hole 1013. The air blowing component 53 in the embodiment includes a mounting part and a plurality of fan blades 532, which are arranged at intervals on the side of the clamping body 31 away from the driving assembly 20 along the axial direction of the third through hole 1013. Thus, the clamping body 31 rotates under the drive of the driving assembly 20, and at the same time drives the fan blades 532 to rotate. Without increasing additional wind-driven electrical appliances, the air flow in the mounting cavity 101 can be stirred during the rotation of the fan blades 532 to generate wind force blowing away from the driving assembly 20, which is low in cost and convenient to assemble. These wind forces can blow the liquid carried by the surface of the grinding piece 40 and the inner surface of the second shell component 13 away from the driving assembly 20 along the second hole section 134, improve the exchange of gas between the mounting cavity 101 and the external environment to offset the negative pressure, and further avoid the liquid from entering the clamping assembly 30 and the driving assembly 20 from the inner wall surface of the second hole section 134 and the surface of the grinding piece 40, thereby improving the service life of the clamping assembly 30 and the driving assembly 20. That is, the air blowing component 53 located in the second hole section 134 can timely blow out the liquid that may enter the mounting cavity 101 along with the grinding piece 40, further ensuring that the liquid does not enter the mounting cavity 101.

[0065] The mounting portion in the embodiment includes a mounting sleeve 531, and the clamping assembly 30 includes a clamping body 31, an abutting piece 32, and a pressing component. The clamping body 31 is connected with the driving assembly 20, the clamping body 31 is provided with a clamping hole 310, the axial direction of the clamping hole 310 is parallel to the axial direction of the third through hole 1013, the fourth through hole 5311 is provided in the mounting sleeve 531 along the axial direction of the clamping body 31, the fan blade 532 is arranged on the outer surface of the mounting sleeve 531 away from the fourth through hole 5311 along the radial direction of the clamping body 31, and the end of the clamping body 31 away from the driving assembly 20 is matched with the fourth through hole 5311 and is sleeved in the fourth through hole 5311. The abutting piece 32 is connected with the clamping body 31 and can reciprocate along the radial direction of the third through hole 1013. The pressing component is sleeved outside the clamping body 31, is located between the mounting sleeve 531 and the driving assembly 20, and can reciprocate along the axial direction of the third through hole 1013 relative to the clamping body 31, and the pressing component can be moved to be in contact with the abutting piece 32 so that the abutting piece 32 abuts the grinding piece 40 in the clamping hole 310.

[0066] Specifically, when the clamping body 31 includes a second transmission shaft 311 and a transmission sleeve 312, the second transmission shaft 311 is connected with the driving assembly 20. The transmission sleeve 312 is connected with the side of the second transmission shaft 311 away from the driving assembly 20, and the side of the transmission sleeve 312 away from the second transmission shaft 311 is matched with the fourth through hole 5311 and is sleeved in the fourth through hole 5311. In the embodiment, the fan blade 532 is arranged on the surface of the mounting sleeve 531, the mounting sleeve 531 is sleeved on the transmission sleeve 312 of the clamping body 31 through the fourth through hole 5311, and the installation of the blowing component 53 is realized, so that the assembly is convenient and efficient.

[0067] When the mounting sleeve 531 is sleeved with the transmission sleeve 312 of the clamping body 31, an inner thread can be arranged in the fourth through hole 5311 of the mounting sleeve 531, and the outer surface of the transmission sleeve 312 is arranged with an outer thread matched with the inner thread, so that the mounting sleeve 531 and the transmission sleeve 312 are screwed together through the cooperation of the inner thread and the outer thread, the assembly is more efficient and convenient, and the connection strength and stability between the mounting sleeve 531 and the clamping body 31 can be ensured without increasing a locking piece.

[0068] For purposes of the description hereinafter, the terms "upper", "lower", "right", "left", "rear", "front", "vertical" and "horizontal" as can be perceived herein relative to the accompanying drawings refer to the orientation of the components being described. However, it is to be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device described herein relative to the other device or structure is inverted, then a spatially relative term such as "above" can be interpreted as meaning "below" or "below" can be interpreted as meaning "above". The device can also be oriented in other ways (rotated at 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly. The devices can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0069] In addition, it should be pointed out that the use of "first", "second" and the like words to qualify parts, is only for the convenience of distinguishing the corresponding parts, and the above words have no special meaning unless otherwise stated, and therefore cannot be understood as limiting the scope of protection of the present application.

[0070] The preferred embodiments of the present application have been described above with the purpose of enabling not to limit the scope of protection of the present application, but of enabling a person skilled in the art to make various modifications and changes to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. An anti-backflow power handle characterized in that, The utility model relates to a kind of installation components and grinding device, including: Installation component (10), installation cavity (101) are arranged in the installation component (10); Driving mechanism, the driving mechanism includes driving assembly (20), clamping assembly (30) and grinding piece (40), the driving assembly (20) and the clamping assembly (30) are installed in the installation cavity (101), the driving assembly (20) is connected with the clamping assembly (30), the clamping assembly (30) is used to clamp the grinding piece (40) and can drive the grinding piece (40) rotation under the driving of the driving assembly (20); Air pressure adjusting assembly (50), the air pressure adjusting assembly (50) includes air passage component and air blowing component (53), the air passage component is arranged in the installation component (10) and is communicated between the installation cavity (101) and the external environment of the installation component (10), the air blowing component (53) is installed in the installation cavity (101), and the air blowing component (53) includes air inlet side and air outlet side, and the air passage component is between the driving assembly (20) and the air inlet side.

2. The anti-backflow power handle of claim 1, wherein, The utility model relates to a kind of installation components and grinding device, including: First flow channel (51), the first flow channel (51) is arranged in the installation component (10), and the first flow channel (51) is communicated with the side of the installation cavity (101) close to the driving assembly (20); Second flow channel (52), the second flow channel (52) is arranged in the installation component (10) and is connected with the installation cavity (101), and the second flow channel (52) is between the first flow channel (51) and the air inlet side.

3. The anti-backflow power handle of claim 2, wherein, The utility model relates to a kind of installation components and grinding device, including: First shell component (11), the first through hole (1011) is arranged in the first shell component (11), and the driving assembly (20) is installed in the first through hole (1011); Mounting component (12), the mounting component (12) is connected with the first shell component (11), and the second through hole (1012) is arranged in the mounting component (12) and is communicated with the first through hole (1011); Second shell component (13), the second shell component (13) is connected with the side of the mounting component (12) away from the first shell component (11), and the third through hole (1013) is arranged in the second shell component (13) and is communicated with the second through hole (1012), and the clamping assembly (30) is installed in the second through hole (1012) and the third through hole (1013) and is connected with the driving assembly (20); Wherein, the first flow channel (51) is arranged in the mounting component (12) and is communicated with the second through hole (1012), and the second flow channel (52) is arranged in the second shell component (13) and is communicated with the third through hole (1013).

4. The anti-backflow power handle of claim 3, wherein, The first flow channel (51) comprises a first air hole (511) and a first gap (512), and the mounting component (12) comprises: A rotating sleeve (121) is mounted between the first housing component (11) and the second housing component (13), the second through hole (1012) is arranged in the rotating sleeve (121), and the first air hole (511) is arranged in the side wall of the rotating sleeve (121) and communicates with the second through hole (1012); A knob (122) is sleeved on the outside of the rotating sleeve (121) and can rotate relative to the rotating sleeve (121) around the axis of the rotating sleeve (121), and the first gap (512) is formed between the knob (122) and the first housing component (11) and the rotating sleeve (121), and the first gap (512) communicates with the first air hole (511).

5. The anti-backflow power handle of claim 4, wherein, The first air hole (511) comprises a plurality of first air holes (511) arranged in the rotating sleeve (121) near the first housing component (11) in the circumferential direction.

6. The anti-backflow power handle of claim 3, wherein, The third through hole (1013) comprises a first hole section (132) and a second hole section (134), and the second housing component (13) comprises: A first housing (131) is connected to the side of the mounting component (12) away from the first housing component (11), the first hole section (132) is arranged in the first housing (131) and communicates with the second through hole (1012), and the second flow channel (52) is arranged in the side wall of the first housing (131) and communicates with the side of the first hole section (132) near the second through hole (1012); A second housing (133) is connected to the side of the first housing (131) away from the mounting component (12), and the second hole section (134) is arranged in the second housing (133) and communicates with the first hole section (132).

7. The anti-backflow power handle of claim 6, wherein, The second flow channel (52) comprises an inclined hole (521), which is inclined away from the mounting component (12) in the axial direction of the first hole section (132).

8. The anti-backflow power handle of claim 7, wherein, The first included angle between the central axis of the inclined hole (521) and the central axis of the first hole section (132) is between 55 degrees and 65 degrees; and / or, the inclined hole (521) comprises a plurality of inclined holes (521) arranged in the side wall of the first housing (131) in the circumferential direction of the first hole section (132).

9. The anti-backflow power handle of any one of claims 3 to 5, wherein, The clamping assembly (30) comprises a clamping body (31) connected to the driving assembly (20), the air blowing component (53) is located on the side of the third through hole (1013) away from the mounting component (12), and the air blowing component (53) comprises: A mounting portion; A plurality of fan blades (532) are spaced apart and mounted to the clamping body (31) away from the driving assembly (20) by the mounting portion along the axial direction of the third through hole (1013).

10. The anti-backflow power handle of claim 9, wherein, The mounting portion comprises a mounting sleeve (531) with a fourth through hole (5311) penetratingly arranged therein along the axial direction of the clamping body (31), and the fan blades (532) are arranged on the outer surface of the mounting sleeve (531) away from the fourth through hole (5311) along the radial direction of the clamping body (31), and the clamping body (31) comprises: A second transmission shaft (311) connected with the driving assembly (20); A transmission sleeve (312) connected with the second transmission shaft (311) away from the driving assembly (20), and the side of the transmission sleeve (312) away from the second transmission shaft (311) is adapted to and sleeved in the fourth through hole (5311).

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