A knife handle with air flotation function

Abstract

A toolholder with an air flotation function belongs to the field of mechanical processing. It aims to solve the problem of how to control the load force of a machining tool during machining, thereby ensuring machining stability. The toolholder housing of the present invention includes a power input portion and a power output portion. A cavity is provided in the power output portion, and the air flotation toolholder is inserted into the cavity and slidably connected to the inner wall of the cavity. The air flotation toolholder divides the cavity into an upper air cavity and a lower air cavity. An exhaust hole is provided on the power output portion and is connected to the upper air cavity. The toolholder housing and the air flotation toolholder are provided with connected air inlet holes and are connected to the lower air cavity. The rotary valve rotor end and the rotary valve stator end are sleeved on the air flotation toolholder, the rotary valve rotor end is fixedly connected to the air flotation toolholder, and the rotary valve stator end is rotatably connected to the rotary valve rotor end. The rotary valve stator end, the rotary valve rotor end, and the air flotation toolholder are provided with connected air ducts, so that an air film is formed between the air flotation toolholder and the toolholder housing. The present invention is used for mechanical processing.

Description

Technical Field

[0001] The invention belongs to the field of mechanical processing, and in particular relates to a tool handle with an air flotation function. Background Art

[0002] During machining, excessive feed speeds often lead to excessive load forces between the tool and the workpiece, which can damage or destroy the tool or workpiece. Similarly, in ultrasonic machining, excessive load forces can cause the ultrasonic amplitude to attenuate or even decrease to zero, impacting machining efficiency and accuracy. Therefore, controlling the load forces during machining is crucial to ensuring machining stability. Summary of the Invention

[0003] The present invention aims to solve the problem of how to control the load force of the machining tool during the machining process and thereby ensure machining stability; the present application provides a tool holder with an air flotation function, which realizes the adjustment of the load force between the machining tool and the workpiece by floating the tool holder up and down.

[0004] The technical solution adopted by the present invention to solve the above technical problems is:

[0005] A knife handle with an air flotation function, comprising a knife handle shell, an air flotation knife handle, a rotary air valve rotor end, and a rotary air valve stator end; the knife handle shell comprises a power input portion and a power output portion arranged axially in sequence, the power output portion having a cavity therein, the power input end of the air flotation knife handle being inserted into the cavity and being slidably connected to the inner wall of the cavity of the power output portion; the air flotation knife handle divides the cavity in the power output portion into an upper air cavity and a lower air cavity; the power output portion is provided with an exhaust hole, which is connected to the upper air cavity to achieve exhaust of the upper air cavity; the knife handle shell and the air flotation knife handle are provided with connected air inlet holes, which are also connected to the lower air cavity, so that the air flotation knife handle floats up and down;

[0006] The rotary air valve rotor end and the rotary air valve stator end are sequentially mounted on the power output end of the air floating knife handle from the inside to the outside, the rotary air valve rotor end is fixedly connected to the power output end of the air floating knife handle, and the rotary air valve stator end is rotatably connected to the rotary air valve rotor end; the rotary air valve stator end, the rotary air valve rotor end and the air floating knife handle are sequentially provided with interconnected air passages, so that an air film is formed between the air floating knife handle and the knife handle shell.

[0007] Preferably, an annular groove is formed at the top of the power input portion of the tool handle housing and serves as a tool handle rivet for connection with the main spindle end of the machine tool.

[0008] Preferably, a certain gap is left between the handle shell and the air-floating handle for filling with gas.

[0009] Preferably, an axially arranged groove is provided on each of the opposite side walls on the power input end of the air-floating knife handle, and two oppositely arranged long strip protrusions are axially arranged on the inner wall of the cavity in the knife handle shell. The long strip protrusions are located in the groove, and a gap is left between the two for gas diffusion. The gap is connected to the gap between the knife handle shell and the air-floating knife handle.

[0010] Preferably, two annular grooves are sequentially provided on the inner end surface of the stator end of the rotary valve from top to bottom, and form two annular air channels with the outer end surface of the rotor end of the rotary valve; two air inlets are provided on the upper end surface of the stator end of the rotary valve, and each air inlet corresponds to an annular air channel;

[0011] The rotor end of the rotary valve is radially provided with two communicating air passages, each communicating air passage corresponding to an annular air passage on the stator end of the rotary valve;

[0012] The air-floating knife handle is provided with two axial airway blind holes penetrating the step surface of the air-floating knife handle, and the air-floating knife handle is provided with two radial air outlet pipes which are arranged opposite to each other and penetrating the groove. Each airway blind hole corresponds to an air outlet pipe setting, and each airway blind hole is connected to a connecting airway on the rotor end of the rotary air valve through a pipe.

[0013] Preferably, two keyways arranged opposite to each other are axially opened on the inner wall of the cavity in the handle shell, and two sliding keys matching the keyways are provided on the power input end of the air-floating handle. The handle shell and the air-floating handle are slidably connected through the cooperation of the keyways and the sliding keys; the connecting line of the two grooves on the air-floating handle is arranged perpendicular to the connecting line of the two sliding keys on the air-floating handle.

[0014] Preferably, an air inlet hole is axially opened on the power input part of the handle shell and passes through the top of the power input part and the upper air cavity; an air inlet blind hole is axially opened on the top of the air-floating handle, and at least two exhaust holes are opened radially on the air-floating handle. The air inlet hole on the handle shell, the air inlet blind hole on the air-floating handle, the exhaust hole on the air-floating handle and the lower air cavity are connected in sequence; wherein a pipe is provided in the upper air cavity for connecting the air inlet hole on the handle shell with the air inlet blind hole on the air-floating handle.

[0015] Preferably, the pipe is a corrugated metal pipe, one end of the corrugated metal pipe is fixedly connected to the air inlet hole of the handle shell, and the other end of the corrugated metal pipe is fixedly connected to the air inlet blind hole of the air-floating handle.

[0016] The beneficial effects of the present invention compared with the prior art are:

[0017] 1. This application divides the tool handle into two parts, namely the tool handle shell and the air-floating tool handle. The tool handle shell and the air-floating tool handle are slidably connected, and an air cavity is provided between the two for pushing the air-floating tool handle to move up and down. By adjusting the amount of gas in the air cavity, the load force of the air-floating tool handle and the processing tool can be adjusted.

[0018] 2. The present application provides an air film between the handle shell and the air-floating handle to reduce the friction between the handle shell and the air-floating handle, thereby facilitating the air-floating handle to float up and down better. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are incorporated in and constitute a part of this application and are used to provide a further understanding of the present invention.

[0020] Figure 1 It is a schematic diagram of the external structure of the present invention.

[0021] Figure 2 Schematic diagram of the internal structure of the present invention Figure 1 .

[0022] Figure 3 Schematic diagram of the internal structure of the present invention Figure 2 , where (a) is a schematic diagram of the airway arrangement of the left and right air injection pipelines; (b) is a schematic diagram of the air film formed between the handle shell and the air-floating handle.

[0023] Figure 4 Schematic diagram of the installation between the handle housing and the air-floating handle.

[0024] Explanation of reference numerals: 1-handle housing; 1-1-power input portion; 1-1-1-annular groove; 1-1-2-keyway; 1-1-3-long strip protrusion; 1-2-power output portion; 1-3-upper air cavity; 1-4-lower air cavity; 1-5-exhaust hole; 1-6-inlet hole; 2-air-floating handle; 2-1-power input end; 2-1-1-sliding key; 2-1-2-groove; 2-2-power output end; 2-3-inlet blind hole; 2 -4-exhaust hole; 2-5-left airway blind hole; 2-6-right airway blind hole; 2-7-left air outlet pipe; 2-8-right air outlet pipe; 3-rotor end of rotary air valve; 3-1-left connecting airway; 3-2-right connecting airway; 4-stator end of rotary air valve; 4-1-upper annular airway; 4-2-lower annular airway; 4-3-left air inlet; 4-4-right air inlet; 5-pipeline; 6-left airway pipe; 7-right airway pipe; 8-annular cavity. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0026] See also Figure 1 , the embodiment of the present application provides a knife handle with an air flotation function, which includes a knife handle shell 1, an air flotation knife handle 2, a rotary air valve rotor end 3 and a rotary air valve stator end 4; the knife handle shell 1 includes a power input part 1-1 and a power output part 1-2 arranged axially in sequence, and a cavity is opened in the power output part 1-2, and the power input end 2-1 of the air flotation knife handle 2 is inserted into the cavity from the end of the power output part 1-2 of the knife handle shell 1 away from the power input part 1-1, and is slidably connected with the inner wall of the cavity of the power output part 1-2; the air flotation knife handle 2 divides the cavity in the power output part 1-2 into an upper air cavity 1-3 and a lower air cavity 1-4; the power output part 1-2 is provided with an exhaust hole 1-5, which is connected to the upper air cavity 1-3 to realize the exhaust of the upper air cavity 1-3; the knife handle shell 1 and the air flotation knife handle 2 are provided with connected air inlet holes, which are connected to the lower air cavity 1-4, so that the air flotation knife handle 2 floats up and down;

[0027] The rotary air valve rotor end 3 and the rotary air valve stator end 4 are sequentially mounted on the power output end 2-2 of the air floating knife handle 2 from the inside to the outside, the rotary air valve rotor end 3 is fixedly connected to the power output end 2-2 of the air floating knife handle 2, and the rotary air valve stator end 4 is rotatably connected to the rotary air valve rotor end 3; the rotary air valve stator end 4, the rotary air valve rotor end 3 and the air floating knife handle 2 are sequentially provided with interconnected air passages, so that an air film is formed between the air floating knife handle 2 and the knife handle shell 1 to reduce the friction between the two.

[0028] It should be noted that, in this embodiment, the tool holder is installed on the machine tool through the rotating air valve stator end 4, and the main shaft of the machine tool is fixedly connected to the tool holder shell 1; the main shaft of the machine tool transmits the rotational torque to the tool holder shell 1, the air-floating tool holder 2 and the processing tool in sequence. Since the upper air cavity 1-3 and the lower air cavity 1-4 with adjustable air volume are formed between the air-floating tool holder 2 and the tool holder shell 1, when the processing tool load is too large or the load is not constant during the processing, the air-floating tool holder 2 floats up and down by increasing the air volume of the lower air cavity 1-4 or continuously adjusting the air volume of the lower air cavity 1-4, so that the load between the processing tool and the workpiece is relatively constant, thereby ensuring the processing quality of the workpiece.

[0029] In this embodiment, an opening is opened at the bottom end of the power output part 1-2 of the handle shell 1, and the power input end 2-1 of the air-floating handle 2 is inserted into the cavity from the opening at the bottom end of the handle shell 1 and sealed to prevent the gas in the lower air cavity 1-4 from leaking.

[0030] In this embodiment, the cross-section of the power input end 2-1 of the air-floating knife handle 2 is T-shaped, and an upper air cavity 1-3 is formed between the upper end surface of the power input end 2-1 of the air-floating knife handle 2 and the top wall of the cavity of the knife handle shell 1; an annular lower air cavity 1-4 is formed between the lower end surface of the power input end 2-1 of the air-floating knife handle 2 and the bottom wall of the cavity of the knife handle shell 1, and a step is provided on the power output end 2-2 of the air-floating knife handle 2, and the rotary air valve rotor end 3 and the rotary air valve stator end 4 are installed at the step of the air-floating knife handle 2, and the rotary air valve rotor end 3 and the power output end 2-2 of the air-floating knife handle 2 form a sealed annular cavity 8; the bottom end of the power output end 2-2 of the air-floating knife handle 2 is provided with a spring chuck hole for installing processing tools.

[0031] In this embodiment, a valve is provided on the exhaust hole 1-5 to facilitate adjustment of the exhaust volume in the upper air cavity 1-3.

[0032] See also Figure 1 The top of the power input part 1-1 of the tool handle housing 1 is provided with an annular groove 1-1-1, which is connected to the main spindle end of the machine tool as a tool handle rivet.

[0033] See also Figure 4 A certain gap is left between the handle shell 1 and the air-floating handle 2 for filling with gas and forming an air film to reduce the friction between the two.

[0034] See also Figure 4 On the power input end of the air-floating knife handle 2, there is an axially arranged groove 2-1-2 on each of the opposite side walls, and on the inner wall of the cavity in the knife handle shell 1, there are two axially arranged long strip protrusions 1-1-3 opposite to each other. The long strip protrusions 1-1-3 are located in the groove 2-1-2, and a gap is left between the two for gas diffusion. The gap is connected to the gap between the knife handle shell 1 and the air-floating knife handle 2.

[0035] In this embodiment, the cooperation between the long strip protrusion 1-1-3 on the handle shell 1 and the groove 2-1-2 on the air-floating handle 2 guides the gas, allowing the gas to diffuse to both sides and fill the gap between the handle shell 1 and the air-floating handle 2, ensuring uniform formation of the gas film. Figure 3 , two annular grooves are sequentially formed on the inner end surface of the rotary valve stator end 4 from top to bottom, and two annular air channels are formed with the outer end surface of the rotary valve rotor end 3, which are respectively set as the upper annular air channel 4-1 and the lower annular air channel 4-2. Two air inlets are formed on the upper end surface of the rotary valve stator end 4, which are respectively set as the left air inlet 4-3 and the right air inlet 4-4. The left air inlet 4-3 is connected to the lower annular air channel 4-2, and the right air inlet 4-4 is connected to the upper annular air channel 4-1;

[0036] The rotary valve rotor end 3 is radially provided with two communicating air passages, namely a left communicating air passage 3-1 and a right communicating air passage 3-2; wherein the left communicating air passage 3-1 is connected to the upper annular air passage 4-1 of the rotary valve stator end 4, and the right communicating air passage 3-2 is connected to the lower annular air passage 4-2 of the rotary valve stator end 4;

[0037] The air-floating knife handle 2 has two axially-opened airway blind holes that penetrate the step surface of the air-floating knife handle 2, which are respectively set as the left airway blind hole 2-5 and the right airway blind hole 2-6. The air-floating knife handle 2 has two radially-opened air outlet pipes that are oppositely arranged and penetrate the two grooves 2-1-2, which are respectively set as the left air outlet pipe 2-7 and the right air outlet pipe 2-8. The left air outlet pipe 2-7 corresponds to the groove 2-1-2 on the left side of the air-floating knife handle 2, and the right air outlet pipe 2-8 corresponds to the groove 2-1-2 on the right side of the air-floating knife handle 2; the left airway blind hole 2-5 is connected to the left air outlet pipe 2-7; the right airway blind hole 2-6 is connected to the right air outlet pipe 2-8;

[0038] The left connecting airway 3 - 1 is connected to the left airway blind hole 2 - 5 via a left airway pipe 6 , and the right connecting airway 3 - 2 is connected to the right airway blind hole 2 - 6 via a right airway pipe 7 .

[0039] In this embodiment, since the stator end 4 of the rotary valve is fixed and the rotor end 3 of the rotary valve is rotating, in order to ensure that the connecting air channel on the rotor end 3 of the rotary valve is always connected to the air channel on the stator end 4 of the rotary valve, the air channel on the stator end 4 of the rotary valve is set as an annular air channel, so that the rotor end 3 of the rotary valve can communicate with the air channel on the stator end 4 of the rotary valve no matter what angle it rotates to.

[0040] In this embodiment, the left air path pipe 6 and the right air path pipe 7 are both in the annular cavity 8, one end of the left air path pipe 6 is fixedly connected to the left connecting air channel 3-1, and the other end of the left air path pipe 6 is fixedly connected to the left air channel blind hole 2-5; one end of the right air path pipe 7 is fixedly connected to the right connecting air channel 3-2, and the other end of the right air path pipe 7 is fixedly connected to the right air channel blind hole 2-6. Since the rotary air valve rotor end 3 and the air flotation knife handle 2 rotate together, it does not affect the installation and fixation of the left air path pipe 6 and the right air path pipe 7, and the left air path pipe 6 and the right air path pipe 7 also rotate together.

[0041] In this embodiment, the left air inlet 4-3 of the rotary valve stator end 4, the lower annular air channel 4-2 of the rotary valve stator end 4, the right connecting air channel 3-2 of the rotary valve rotor end 3, the right air path pipeline 7, the right air channel blind hole 2-6 of the air flotation knife handle 2 and the right air outlet pipeline 2-8 of the air flotation knife handle 2 are connected in sequence to form a right air injection pipeline; the right air inlet 4-4 of the rotary valve stator end 4, the upper annular air channel 4-1 of the rotary valve stator end 4, the left connecting air channel 3-2 of the rotary valve rotor end 3 The channel 3-1, the left air path pipeline 6, the left air channel blind hole 2-5 of the air-floating knife handle 2 and the left air outlet pipeline 2-7 of the air-floating knife handle 2 are connected in sequence to form a left air injection pipeline; the right air injection pipeline is arranged opposite to the left air injection pipeline, and continuously injects gas into the long strip protrusion on the knife handle shell 1 and the groove 2-1-2 of the air-floating knife handle 2 respectively, and the gas flows to both sides and stays in the gap between the knife handle shell 1 and the air-floating knife handle 2, reducing the friction between the knife handle shell 1 and the air-floating knife handle 2.

[0042] See also Figure 1 Two keyways 1-1-2 are arranged opposite to each other on the inner wall of the cavity in the tool handle shell 1, and two sliding keys 2-1-1 matching the keyways 1-1-2 are arranged on the outer wall of the power input end 2-1 of the air-floating tool handle 2. The tool handle shell 1 and the air-floating tool handle 2 are slidably connected through the cooperation of the keyways 1-1-2 and the sliding keys 2-1-1, and a gap is left between the keyways 1-1-2 and the sliding keys 2-1-1 in the radial direction; the connecting line of the two grooves 2-1-2 on the air-floating tool handle 2 is perpendicular to the connecting line of the two sliding keys 2-1-1 on the air-floating tool handle 2; the axial length of the keyway 1-1-2 is less than the axial height of the cavity and greater than the length of the sliding keys 2-1-1, so as to ensure that the air-floating tool handle 2 can slide a certain distance in the axial direction, realize the load adjustment of the air-floating tool handle 2, and also limit the maximum load force and minimum load force between the machining tool and the workpiece.

[0043] In this embodiment, when the load between the machining tool and the workpiece is relatively large, a certain amount of gas is injected into the lower air chamber 1-4, increasing the pressure within the lower air chamber 1-4. The air-floating toolholder 2 slides upward under the action of the relatively large pressure within the lower air chamber 1-4, driving the machining tool upward. At this point, the load between the machining tool and the workpiece is reduced to a set value. If the load between the machining tool and the workpiece is too large, the sliding key 2-1-1 of the air-floating toolholder 2 can slide to the top of the keyway 1-1-2, at which point the minimum load force between the machining tool and the workpiece is achieved. When the load between the machining tool and the workpiece is relatively small, the gas within the lower air chamber 1-4 is withdrawn, causing the air-floating toolholder 2 to slide downward due to the gravity of itself and the machining tool, increasing the load between the machining tool and the workpiece. When the sliding key 2-1-1 of the air-floating toolholder 2 slides to the bottom of the keyway 1-1-2, the maximum load force between the machining tool and the workpiece is achieved.

[0044] See also Figure 1 The power input part 1-1 of the shank shell 1 has an axial air inlet hole 1-6 that runs through the top of the power input part 1-1 and the upper air cavity 1-3; the top of the air-floating shank 2 has an axial air inlet blind hole 2-3, and the air-floating shank 2 has at least two exhaust holes 2-4 in the radial direction. The air inlet hole 1-6 on the shank shell 1, the air inlet blind hole 2-3 on the air-floating shank 2, the exhaust hole 2-4 on the air-floating shank 2 and the lower air cavity 1-4 are connected in sequence; wherein a pipe 5 is provided in the upper air cavity 1-3 for connecting the air inlet hole 1-6 on the shank shell 1 with the air inlet blind hole 2-3 on the air-floating shank 2.

[0045] Furthermore, the pipe 5 is a corrugated metal tube, one end of which is fixedly connected to the air inlet hole 1-6 of the handle housing 1, and the other end of which is fixedly connected to the air inlet blind hole 2-3 of the air-floating handle 2.

[0046] In this embodiment, when the load between the machining tool and the workpiece is adjusted by the tool handle shell 1 and the air-floating tool handle 2, since relative displacement will occur between the tool handle shell 1 and the air-floating tool handle 2, the air inlet hole 1-6 of the tool handle shell 1 and the air inlet blind hole 2-3 of the air-floating tool handle 2 can be ensured to be always in a connected state by compensating the length of the corrugated metal tube.

[0047] In this embodiment, the gas that moves upward to reduce the load force of the machining tool enters the lower air cavity 1-4 through the air inlet hole 1-6 on the tool handle shell 1, the air inlet blind hole 2-3 and the exhaust hole 2-4 on the air-floating tool handle 2 in sequence, so that the pressure of the gas in the lower air cavity 1-4 increases and the air-floating tool handle 2 moves upward.

[0048] The working process of the present invention is further described below to further demonstrate the working principle and advantages of the present invention:

[0049] First, install the machining tool on the power output end 2-2 of the air-floating tool holder 2, and install the power input end of the tool holder housing 1 on the machine tool spindle;

[0050] Secondly, gas is injected into the left air inlet 4-3 and the right air inlet 4-4 of the rotary valve stator end 4 at the same time, and the gas passes through the right connecting air duct 3-2 of the rotary valve rotor end 3, the right air path pipeline 7, the right air duct blind hole 2-6 of the air floating knife handle 2 and the right air outlet pipeline 2-8 of the air floating knife handle 2 in sequence and enters the gap between the groove of the air floating knife handle 2 on the left and the long strip protrusion of the knife handle shell 1, and the gas in the gap diffuses to both sides and diffuses into the gap between the knife handle shell 1 and the air floating knife handle 2; at the same time, the gas The gas passes through the upper annular air channel 4-1 of the rotary valve stator end 4, the left connecting air channel 3-1 of the rotary valve rotor end 3, the left air path pipeline 6, the left air channel blind hole 2-5 of the air-floating knife handle 2 and the left air outlet pipeline 2-7 of the air-floating knife handle 2 in sequence and enters the gap between the groove of the air-floating knife handle 2 on the right and the long strip protrusion of the knife handle shell 1. The gas in the gap diffuses to both sides and diffuses into the gap between the knife handle shell 1 and the air-floating knife handle 2. At this time, the space between the knife handle shell 1 and the air-floating knife handle 2 is filled with gas to form an air film.

[0051] Finally, start the machine tool, and the machine tool spindle transmits the rotational torque to the tool holder housing 1, the air-floating tool holder 2 and the processing tool in turn, and feeds the workpiece; open the valve on the exhaust hole 1-5, and ventilate the air to the air inlet hole 1-6 on the tool holder housing 1. The gas passes through the pipe 5, the air inlet blind hole 2-3 on the air-floating tool holder 2, the exhaust hole 2-4 on the air-floating tool holder 2 and enters the lower air cavity 1-4 in turn. The pressure in the lower air cavity 1-4 increases, and the air-floating tool holder 2 is lifted up. The gas in the upper air cavity 1-3 is discharged through the exhaust hole 1-5 valve.

[0052] When the load force between the machining tool and the workpiece is less than the set load threshold, the valve on the exhaust hole 1-5 is turned down, and the air intake in the lower air cavity 1-4 is adjusted at the same time, so that the pressure of the lower air cavity 1-4 on the air-floating tool holder 2 adapts to the tool load force and maintains the relative position of the tool unchanged.

[0053] When the load force between the machining tool and the workpiece exceeds the set threshold, the valve on the exhaust hole 1-5 is adjusted to a large amount of air to the air inlet hole 1-6 on the tool holder shell 1, the pressure in the lower air cavity 1-4 is increased, and the air-floating tool holder 2 is lifted up again, reducing the actual feed of the tool, thereby reducing the load force between the machining tool and the workpiece, thereby achieving the purpose of protecting the tool and the workpiece.

[0054] This application divides the tool handle into two parts, namely the tool handle shell and the air-floating tool handle. The tool handle shell and the air-floating tool handle are slidingly connected, and an air cavity is provided between the two for pushing the air-floating tool handle to move up and down. By adjusting the amount of gas in the air cavity, the load force of the air-floating tool handle and the processing tool can be adjusted.

[0055] In the present application, an air film is provided between the handle shell and the air-floating handle to reduce the friction between the handle shell and the air-floating handle, thereby facilitating the air-floating handle to float up and down better.

[0056] Although the present invention is described herein with reference to specific embodiments, it should be understood that these embodiments are merely illustrative of the principles and applications of the invention. It should be understood that many modifications may be made to the illustrative embodiments, and that other arrangements may be devised, without departing from the spirit and scope of the invention as defined by the appended claims. It should be understood that the various dependent claims and features described herein may be combined in ways other than those described in the original claims. It should also be understood that features described in conjunction with individual embodiments may be employed in conjunction with other described embodiments.

Claims

1. A knife handle with air flotation function, characterized by: It comprises a handle shell (1), an air-floating handle (2), a rotary air valve rotor end (3) and a rotary air valve stator end (4); the handle shell (1) comprises a power input part (1-1) and a power output part (1-2) arranged in sequence in the axial direction, a cavity is defined in the power output part (1-2), the power input end (2-1) of the air-floating handle (2) is inserted into the cavity and is slidably connected to the inner wall of the cavity of the power output part (1-2); the The air-floating knife handle (2) divides the cavity in the power output part (1-2) into an upper air cavity (1-3) and a lower air cavity (1-4); the power output part (1-2) is provided with an exhaust hole (1-5), which is connected to the upper air cavity (1-3) to achieve exhaust of the upper air cavity (1-3); the knife handle housing (1) and the air-floating knife handle (2) are provided with connected air inlet holes, which are connected to the lower air cavity (1-4), so that the air-floating knife handle (2) floats up and down; The rotary air valve rotor end (3) and the rotary air valve stator end (4) are sequentially mounted on the power output end (2-2) of the air-floating knife handle (2) from the inside to the outside, the rotary air valve rotor end (3) is fixedly connected to the power output end (2-2) of the air-floating knife handle (2), and the rotary air valve stator end (4) is rotatably connected to the rotary air valve rotor end (3); the rotary air valve stator end (4), the rotary air valve rotor end (3) and the air-floating knife handle (2) are sequentially provided with interconnected air passages, so that an air film is formed between the air-floating knife handle (2) and the knife handle shell (1).

2. The knife handle with air flotation function according to claim 1, characterized in that: An annular groove (1-1-1) is formed at the top end of the power input portion (1-1) of the tool handle housing (1) and serves as a tool handle rivet for connection with the main spindle end of a machine tool.

3. The knife handle with air flotation function according to claim 1, characterized in that: A gap is left between the handle shell (1) and the air-floating handle (2) for filling with gas.

4. The knife handle with air flotation function according to claim 3, characterized in that: An axially arranged groove (2-1-2) is respectively formed on the opposite side walls of the power input end of the air-floating knife handle (2); two oppositely arranged long strip protrusions (1-1-3) are axially arranged on the inner wall of the cavity in the knife handle shell (1); the long strip protrusions (1-1-3) are located in the groove (2-1-2), and a gap for gas diffusion is left between the two protrusions; the gap is communicated with the gap between the knife handle shell (1) and the air-floating knife handle (2).

5. The knife handle with air flotation function according to claim 4, characterized in that: The inner end surface of the rotary valve stator end (4) is provided with two annular grooves from top to bottom, and two annular air channels are formed with the outer end surface of the rotary valve rotor end (3); the upper end surface of the rotary valve stator end (4) is provided with two air inlets, each air inlet corresponding to an annular air channel; The rotary valve rotor end (3) is radially provided with two communicating air passages, each communicating air passage corresponding to an annular air passage on the rotary valve stator end (4); The air-floating knife handle (2) is provided with two airway blind holes axially extending through the step surface of the air-floating knife handle (2), and the air-floating knife handle (2) is provided with two air outlet pipes radially extending through the groove (2-1-2) and arranged opposite to each other. Each airway blind hole corresponds to an air outlet pipe, and each airway blind hole is connected to a connecting airway on the rotor end (3) of the rotary air valve through a pipe.

6. The knife handle with air flotation function according to claim 4, characterized in that: Two keyways (1-1-2) arranged opposite to each other are axially opened on the inner wall of the cavity in the handle shell (1); two sliding keys (2-1-1) matching the keyways (1-1-2) are arranged on the power input end (2-1) of the air-floating handle (2); the handle shell (1) and the air-floating handle (2) are slidably connected through the cooperation of the keyways (1-1-2) and the sliding keys (2-1-1); a line connecting the two grooves (2-1-2) on the air-floating handle (2) and a line connecting the two sliding keys (2-1-1) on the air-floating handle (2) are arranged perpendicularly.

7. The knife handle with air flotation function according to claim 1, characterized in that: An air inlet (1-6) is axially opened on the power input part (1-1) of the handle shell (1) and penetrates the top end of the power input part (1-1) and the upper air cavity (1-3); an air inlet blind hole (2-3) is axially opened on the top end of the air-floating handle (2); at least two air exhaust holes (2-4) are radially opened on the air-floating handle (2); the air inlet hole (1-6) on the handle shell (1), the air inlet blind hole (2-3) on the air-floating handle (2), the air exhaust hole (2-4) on the air-floating handle (2) and the lower air cavity (1-4) are sequentially connected; wherein a pipe (5) is provided in the upper air cavity (1-3) for connecting the air inlet hole (1-6) on the handle shell (1) with the air inlet blind hole (2-3) on the air-floating handle (2).

8. The knife handle with air flotation function according to claim 7, characterized in that: The pipe (5) is a corrugated metal pipe, one end of which is fixedly connected to the air inlet hole (1-6) of the handle housing (1), and the other end of which is fixedly connected to the air inlet blind hole (2-3) of the air-floating handle (2).

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