Main shaft mechanism with quick-disassembly and quick-assembly sealing structure and gear processing machine tool

Abstract

According to the main shaft mechanism with the quick-disassembly and quick-assembly sealing structure and the gear processing machine tool, when a built-in direct-drive motor breaks down and needs to be maintained, due to the fact that the sealing gland for sealing the disassembly and assembly opening is detachably connected with the tool rest shell through the bolt, and the rear end of the main shaft is detachably connected with the first locking piece, the main shaft can be conveniently disassembled and assembled; the first annular sealing piece is locked on the rear end bearing seat through the first locking piece, and the first annular sealing piece is in sliding sealing contact with the rear end bearing seat and / or the first locking piece and / or the rear end of the main shaft. The second bearing assembly, the first locking piece and the first annular sealing piece can be disassembled along with the rear-end bearing seat, so that a sealing structure formed by the first sealing assembly can be quickly disassembled in time, conveniently and quickly, and the direct-drive motor can be taken out from the interior of the knife rest shell to be maintained; maintenance personnel can conveniently maintain the built-in direct-drive motor, and the maintenance efficiency can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of machine tool equipment, and in particular relates to a spindle mechanism and a gear processing machine tool with a quick-disassembly and quick-installation sealing structure. Background Art

[0002] The spindle of a CNC machine tool refers to the axis on the machine tool that drives the workpiece or tool to rotate. The spindle mechanism of a CNC machine tool is usually composed of a spindle, bearings, and transmission parts. At present, the spindle mechanism of a gear processing machine tool generally uses a built-in direct-drive motor directly connected to the spindle mechanism in order to eliminate the reverse clearance caused by the gear transmission and solve the problems of low transmission efficiency and poor transmission accuracy between the motor and the spindle mechanism. However, since the direct-drive motor is built into the tool holder housing, and the sealing structure between the spindle mechanism and the tool holder housing generally has the defect of complex structure, it is difficult to achieve quick disassembly and quick installation. Therefore, when the built-in direct-drive motor fails, it is usually difficult to quickly disassemble and install the sealing structure in a timely and convenient manner, which makes it inconvenient for maintenance personnel to repair the built-in direct-drive motor, reducing maintenance efficiency. Utility Model Content

[0003] Based on the above-mentioned problems existing in the prior art, one of the purposes of the embodiments of the utility model is to provide a spindle mechanism with a quick-release and quick-install sealing structure to solve the problem that the sealing structure between the spindle mechanism and the tool holder housing in the prior art is generally complex in structure and difficult to disassemble in a timely and convenient manner, which makes it inconvenient for maintenance personnel to repair the built-in direct-drive motor and reduces maintenance efficiency.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide a spindle mechanism with a quick-release and quick-install sealing structure, comprising:

[0005] A tool holder housing has a columnar mounting cavity inside, the front end of the tool holder housing has a necking opening communicating with the mounting cavity, and the rear end of the tool holder housing has a disassembly opening communicating with the mounting cavity;

[0006] A spindle, accommodated in the tool holder housing;

[0007] A first bearing assembly, used for rotatably mounting the nose end of the spindle in the necking opening;

[0008] A second bearing assembly, used for rotatably mounting the rear end of the main shaft in the disassembly opening; and

[0009] A first sealing assembly is used to seal the rear end of the main shaft, the first sealing assembly includes a rear end bearing seat rotatably mounted on the rear end of the main shaft, a first annular seal that presses and seals the second bearing assembly in the annular sealing cavity of the rear end bearing seat, a first locking member for locking the first annular seal on the rear end bearing seat, a sealing gland for closing the disassembly and assembly port and confining the rear end bearing seat in the disassembly and assembly port, and a bolt for detachably mounting the sealing gland on the tool holder housing, the rear end of the main shaft is detachably connected to the first locking member, and the first annular seal is in sliding sealing contact with the rear end bearing seat and / or the first locking member and / or the rear end of the main shaft.

[0010] Furthermore, the spindle mechanism with a quick-release and quick-install sealing structure also includes a second sealing assembly for sealing the nose end of the spindle, the second sealing assembly includes a second annular seal and a third annular seal for pressing and sealing the first bearing assembly in the necking mouth, the second annular seal is arranged at the connection between the necking mouth and the mounting cavity, the second annular seal is clamped and fixed between the stator assembly and the inner side wall of the tool holder housing, the third annular seal is arranged at the mouth of the necking mouth, the second sealing assembly also includes a second locking piece for locking the third annular seal to the nose end of the spindle, and the nose end of the spindle is threadedly connected to the second locking piece.

[0011] Furthermore, the second locking member is a locking nut, and the nose end of the main shaft is provided with an external thread that matches the internal thread of the locking nut.

[0012] Furthermore, the second locking member includes a locking nut and a supporting protrusion extending radially outward from one end of the locking nut, and a first step groove for the supporting protrusion to abut is provided on the corresponding end surface of the third annular seal, and the supporting protrusion is accommodated in the first step groove and is in liquid-tight contact with the third annular seal.

[0013] Furthermore, the third annular seal includes an annular sealing body for inserting into the necking opening to press against the first bearing assembly and an annular sealing cover extending radially outward from one end of the annular sealing body, wherein the annular sealing cover is arranged at the mouth of the necking opening and is in liquid-tight contact with the necking opening.

[0014] Furthermore, the first step groove is arranged on the end surface of the annular sealing cover facing the supporting convex ring, and a second step groove is arranged on the annular sealing cover adjacent to the first step groove, and a first sealing ring is arranged in the second step groove, and the locking nut is inserted into the second step groove to press the first sealing ring into the second step groove.

[0015] Furthermore, a third step groove is provided on the annular sealing cover adjacent to the second step groove, and an end of the locking nut away from the supporting convex ring is inserted into the third step groove.

[0016] Furthermore, the first end surface of the rear end bearing seat is provided with a first annular groove for accommodating and positioning the first annular seal, the outer circumferential surface of the first annular seal is in liquid-tight contact with the inner surface of the first annular groove, the first locking member includes an internally threaded sleeve sleeved on the rear end of the main shaft and an external pressing end cover extending radially outward from the first end of the internally threaded sleeve, the second end of the internally threaded sleeve is inserted into the first annular groove so that the outer circumferential surface of the internally threaded sleeve is in liquid-tight contact with the inner circumferential surface of the first annular seal, and the pressing end cover is covered on the notch of the first annular groove to press and seal the first annular seal in the first annular groove.

[0017] Furthermore, the internal threaded sleeve is provided with an inner pressure end cover for cooperating with and resisting the rear end of the main shaft, the inner pressure end cover is in liquid-sealed contact with the rear end of the main shaft, and the second end of the rear end bearing seat extends radially inward and is provided with a sealing reinforcement ring for being sleeved on the rear end of the main shaft, and the sealing reinforcement ring, the center ring hole of the rear end bearing seat, the first annular seal and the rear end of the main shaft enclose a closed annular sealing cavity.

[0018] Based on the above problems existing in the prior art, a second object of the embodiments of the present utility model is to provide a gear processing machine tool having a spindle mechanism with a quick-release and quick-install sealing structure in any of the above solutions.

[0019] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: to provide a gear processing machine tool, including the spindle mechanism with the quick-release and quick-installation sealing structure provided by any of the above-mentioned solutions.

[0020] Compared with the prior art, the above one or more technical solutions in the embodiments of the present invention have at least one of the following beneficial effects:

[0021] The spindle mechanism and gear processing machine tool with quick-release and quick-install sealing structure in the embodiment of the utility model, when the built-in direct-drive motor fails and needs to be repaired, since the sealing cover that closes the disassembly and assembly port is detachably connected to the tool holder housing by bolts, and the rear end of the spindle is detachably connected to the first locking piece, the first annular seal is locked on the rear end bearing seat by the first locking piece, and the first annular seal is in sliding sealing contact with the rear end bearing seat and / or the first locking piece and / or the rear end of the spindle, it is only necessary to remove the sealing cover from the disassembly and assembly port of the tool holder housing, and the second bearing assembly, the first locking piece and the first annular seal can be removed together with the rear end bearing seat, so that the sealing structure formed by the first sealing assembly can be quickly disassembled in a timely and convenient manner, so that the disassembly and assembly port of the tool holder housing is in an open state, and the direct-drive motor can be taken out from the inside of the tool holder housing for maintenance, thereby overcoming the defect that it is inconvenient for maintenance personnel to repair the built-in direct-drive motor, which is conducive to improving maintenance efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0023] Figure 1 A schematic cross-sectional view of the main shaft mechanism with a quick-release and quick-install sealing structure provided by the utility model;

[0024] Figure 2 for Figure 1 A schematic diagram of the partially enlarged structure;

[0025] Figure 3 for Figure 1 A schematic diagram of the partially enlarged structure;

[0026] Figure 4 An assembly diagram of the second sealing assembly provided by the utility model;

[0027] Figure 5 A schematic cross-sectional view of the third annular seal provided by the utility model;

[0028] Figure 6 A schematic cross-sectional view of the second locking member provided by the utility model;

[0029] Figure 7 An assembly diagram of the first sealing component provided by the utility model;

[0030] Figure 8A schematic cross-sectional view of the rear end bearing seat provided by the utility model;

[0031] Fig. 9 A schematic cross-sectional view of the first locking member provided by the utility model;

[0032] Fig.10 A schematic cross-sectional view of the main shaft mechanism with a quick-release and quick-install sealing structure provided by the utility model;

[0033] Fig.11 An assembly diagram of the broach mechanism and the spindle provided by the utility model;

[0034] Fig.12 An assembly diagram of the tool holder housing and the tool holder seat provided by the utility model;

[0035] Fig.13 This is a schematic cross-sectional structural diagram of the tool holder housing provided by the utility model.

[0036] Among them, the reference numerals in the figure are:

[0037] 1-tool holder housing; 11-installation cavity; 12-neck opening; 13-disassembly opening; 14-mouth; 15-dovetail guide rail;

[0038] 2-main axis; 21-nose end; 22-rear end; 23-sliding hole;

[0039] 3-first sealing assembly; 31-rear end bearing seat; 311-first annular groove; 312-sealing reinforcement ring; 313-center annular hole; 32-first annular sealing member; 33-first locking member; 331-inner threaded sleeve; 332-external pressing end cover; 333-inner pressing end cover; 34-sealing gland;

[0040] 4-second sealing assembly; 41-second annular sealing member; 42-third annular sealing member; 421-annular sealing body; 422-annular sealing cover; 423-first step groove; 424-second step groove; 425-third step groove; 43-second locking member; 431-locking nut; 432-holding convex ring;

[0041] 5-direct drive motor; 51-stator assembly; 52-rotor assembly;

[0042] 6- broach mechanism; 61- broach shaft; 611- diameter expansion section; 62- elastic member; 63- first abutting member; 64- second abutting member;

[0043] 7-knife release mechanism; 71-hydraulic cylinder; 72-knife top rod;

[0044] 8- measuring assembly; 81- measuring element; 82- sealing element;

[0045] 9-tool holder seat; 91-dovetail slide;

[0046] 10- inertia mechanism; 20- cooling circulation channel; 30- gas transmission channel;

[0047] 40-first bearing assembly; 401-first bearing;

[0048] 50-second bearing assembly; 501-second bearing;

[0049] 60-wire box assembly; 601-box body; 602-terminal block; 603-outlet seal; 604-outlet hole;

[0050] 70-first sealing ring; 80-sealing groove. DETAILED DESCRIPTION

[0051] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0052] It should be noted that when an element is referred to as being "connected 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.

[0053] In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", and "third" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0054] In the description of the present invention, it should be understood that the terms "center", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a dedicated orientation, be constructed and operated in a dedicated orientation, and therefore cannot be understood as a limitation on the present invention.

[0055] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0056] Reference throughout the specification to "one embodiment" or "an embodiment" means that the specialized features, structures, or characteristics described in connection with the embodiment are included in at least one embodiment of the present application. Thus, the phrases "in one embodiment," "in some embodiments," or "in some of these embodiments" appear in various places throughout the specification, not all of which refer to the same embodiment. Furthermore, in one or more embodiments, the specialized features, structures, or characteristics may be combined in any suitable manner.

[0057] Please also read Figures 1 to 9 The spindle mechanism with a quick-release and quick-install sealing structure provided by the embodiment of the utility model is now described. The spindle mechanism with a quick-release and quick-install sealing structure provided by the embodiment of the utility model comprises a tool holder housing 1, a spindle 2, a first bearing assembly 40, a second bearing assembly 50 and a first sealing assembly 3. It should be noted that, please further refer to Figure 1 The direct drive motor 5 in the embodiment of the utility model comprises a stator assembly 51 fixedly arranged inside the tool holder housing 1 and a rotor assembly 52 sleeved on the main shaft 2, wherein the rotor assembly 52 is located inside the stator assembly 51, and the rotor assembly 52 is spaced apart from the stator assembly 51. When the built-in direct drive motor 5 needs to be repaired, the first sealing assembly 3 must be removed from the tool holder housing 1, so that the direct drive motor 5 can be taken out from the tool holder housing 1 for repair.

[0058] Please refer to further Figure 1 and Fig.13 The tool holder housing 1 has a columnar mounting cavity 11 inside, the front end of the tool holder housing 1 has a necking opening 12 connected to the mounting cavity 11, and the rear end 22 of the tool holder housing 1 has a disassembly opening 13 connected to the mounting cavity 11. The spindle 2 is accommodated in the tool holder housing 1, and the nose end 21 of the spindle 2 and the rear end 22 of the spindle 2 extend to the outside of the tool holder housing 1 from the necking opening 12 and the disassembly opening 13 respectively. The first bearing assembly 40 rotatably mounts the nose end 21 of the spindle 2 in the necking opening 12, and the second bearing assembly 50 rotatably mounts the rear end 22 of the spindle 2 in the disassembly opening 13, thereby realizing the rotatable installation of the spindle 2 on the tool holder housing 1 and enhancing the stability of the installation of the spindle 2. Please refer to further reference. Figure 2The first sealing assembly 3 is used to seal the rear end 22 of the main shaft 2. The first sealing assembly 3 includes a rear end bearing seat 31 rotatably sleeved on the rear end 22 of the main shaft 2, a first annular seal 32 that presses and seals the second bearing assembly 50 in the annular sealing cavity of the rear end bearing seat 31, and a first locking member 33 for locking the first annular seal 32 on the rear end bearing seat 31, a sealing gland 34 for closing the disassembly opening 13 and limiting the rear end bearing seat 31 in the disassembly opening 13, and a bolt for detachably mounting the sealing gland 34 on the tool holder housing 1. The outer peripheral wall of the rear end bearing seat 31 is connected to the disassembly opening 13. The mounting opening 13 fits tightly to seal the mounting opening 13 of the tool holder housing 1. The rear end 22 of the spindle 2 is detachably connected to the first locking piece 33 by screws. The first annular seal 32 is in sliding sealing contact with the rear end bearing seat 31 and / or the first locking piece 33 and / or the rear end 22 of the spindle 2. Not only is the structure simple and compact, but it can also seal the rear end 22 of the spindle 2 without affecting the high-speed rotation of the direct-drive motor 5 to drive the spindle 2, thereby preventing oil from leaking into the tool holder housing 1 and causing oil to corrode the direct-drive motor 5, causing the direct-drive motor 5 to be short-circuited and damaged, thereby affecting the normal operation of the direct-drive motor 5. When the built-in direct-drive motor 5 fails and the direct-drive motor 5 accommodated in the tool holder housing 1 needs to be repaired, it is only necessary to remove the sealing cover 34 from the disassembly and assembly port 13 of the tool holder housing 1, and then the second bearing assembly 50, the first locking member 33 and the first annular seal 32 can be removed together with the rear end bearing seat 31, so that the sealing structure formed by the first sealing assembly 3 can be quickly disassembled in a timely and convenient manner, so that the disassembly and assembly port 13 of the tool holder housing 1 is in an open state, and the direct-drive motor 5 can be taken out from the tool holder housing 1 for maintenance, thereby overcoming the defect that it is inconvenient for maintenance personnel to repair the built-in direct-drive motor 5, which is conducive to improving maintenance efficiency. After the direct drive motor 5 is repaired, it only needs to connect the sealing cover 34 to the disassembly and assembly port 13 of the tool holder housing 1 by bolts, so that the second bearing assembly 50, the first locking member 33 and the first annular seal 32 together with the rear end bearing seat 31 can be confined in the disassembly and assembly port 13 of the tool holder housing 1, so that the sealing structure formed by the first sealing assembly 3 can be quickly installed in a timely and convenient manner.

[0059] Compared with the prior art, the spindle mechanism with a quick-release and quick-install sealing structure provided by the embodiment of the utility model has a structure that when the built-in direct-drive motor 5 fails and needs to be repaired, since the sealing gland 34 that closes the disassembly and assembly port 13 is detachably connected to the tool holder housing 1 by bolts, and the rear end of the spindle is detachably connected to the first locking member 33, the first annular sealing member 32 is locked on the rear end bearing seat 31 by the first locking member 33, and the first annular sealing member is in sliding sealing contact with the rear end bearing seat and / or the first locking member and / or the rear end of the spindle, it is only necessary to press the sealing gland 34 to remove the sealing member 32, and the sealing member 32 is in sliding sealing contact with the rear end bearing seat and / or the first locking member and / or the rear end of the spindle. By removing the cover 34 from the disassembly and assembly port 13 of the tool holder housing 1, the second bearing assembly 50, the first locking member 33 and the first annular seal 32 together with the rear end bearing seat 31 can be removed, so that the sealing structure formed by the first sealing assembly 3 can be quickly disassembled in a timely and convenient manner, so that the disassembly and assembly port 13 of the tool holder housing 1 is in an open state, and the direct drive motor 5 can be taken out from the inside of the tool holder housing 1 for maintenance, thereby overcoming the defect that it is inconvenient for maintenance personnel to repair the built-in direct drive motor 5, which is conducive to improving maintenance efficiency.

[0060] Please refer to Figure 1 , Figure 2 and Figure 3In some embodiments, the spindle mechanism with a quick-release and quick-install sealing structure also includes a second sealing assembly 4 for sealing the nose end 21 of the spindle 2. The second sealing assembly 4 includes a second annular seal 41 and a third annular seal 42 for pressing and sealing the first bearing assembly 40 in the necking mouth 12. The second annular seal 41 is arranged at the connection between the necking mouth 12 and the mounting cavity 11. The second annular seal 41 is clamped and fixed between the stator assembly 51 and the inner side wall of the tool holder housing 1. The third annular seal 42 is arranged at the mouth 14 of the necking mouth 12. The second sealing assembly 4 also includes a second locking piece 43 for locking the third annular seal 42 to the nose end 21 of the spindle 2. The nose end 21 of the spindle 2 is threadedly connected to the second locking piece 43. In this embodiment, the sealing structure formed by the second sealing component 4 seals the first bearing component 40 in the necking opening 12 of the tool holder housing 1. Not only is the structure simple and compact, but it can also seal the nose end 21 of the spindle 2 without affecting the high-speed rotation of the direct-drive motor 5 driving the spindle 2, preventing oil from leaking into the tool holder housing 1 and causing the oil to corrode the direct-drive motor 5, causing the direct-drive motor 5 to be short-circuited and damaged, and affecting the normal operation of the direct-drive motor 5. When the spindle 2 is worn and / or the direct-drive motor 5 fails, it is only necessary to remove the second locking member 43 from the nose end 21 of the spindle 2 and remove the rear end bearing seat 31 from the disassembly opening 13 of the tool holder housing 1, so that the spindle 2 and the direct-drive motor 5 sleeved on the spindle 2 can be pulled out from the disassembly opening 13 of the tool holder housing 1, thereby facilitating the replacement of the spindle 2 and / or the maintenance of the direct-drive motor 5. In addition, a sealing groove 80 is provided on the second annular seal 41, and a second sealing ring is provided in the sealing groove 80, which is beneficial to the sealing of the contact between the second annular seal 41 and the main shaft 2, and further prevents oil from leaking into the tool holder housing 1 and causing oil to corrode the direct drive motor 5, causing the direct drive motor 5 to be short-circuited and damaged, thereby affecting the normal operation of the direct drive motor 5.

[0061] Please refer to Figure 3 , Figure 4 , Figure 5 and Figure 6 In some embodiments, the second locking piece 43 is a locking nut 431, and the nose end 21 of the main shaft 2 is provided with an external thread that cooperates with the internal thread of the locking nut 431, so as to facilitate the disassembly and connection of the second locking piece 43 and the nose end 21 of the main shaft 2, thereby facilitating the quick disassembly and quick installation of the sealing structure formed by the second sealing assembly 4.

[0062] Please refer to Figure 3 , Figure 4 , Figure 5 and Figure 6In some embodiments, the second locking member 43 includes a locking nut 431 and a supporting protrusion 432 extending radially outward from one end of the locking nut 431. A first step groove 423 for the supporting protrusion 432 to abut is provided on the corresponding end surface of the third annular seal 42. The supporting protrusion 432 is accommodated in the first step groove 423 and is in liquid-tight contact with the third annular seal 42. When the supporting protrusion 432 of the second locking member 43 is accommodated in the first step groove 423 and is in liquid-tight contact with the third annular seal 42, it is not only conducive to improving the tightness of the second locking member 43 against the third annular seal 42, but also can form a labyrinth seal structure to improve the sealing effect.

[0063] Please refer to Figure 3 , Figure 4 , Figure 5 and Figure 6 In some embodiments, the third annular seal 42 includes an annular sealing body 421 for inserting into the necking opening 12 to press against the first bearing assembly 40 and an annular sealing cover 422 extending radially outward from one end of the annular sealing body 421. The annular sealing cover 422 is covered on the mouth 14 of the necking opening 12 and is in liquid-tight contact with the necking opening 12, so as to form a labyrinth sealing structure and improve the sealing effect.

[0064] Please refer to Figure 3 , Figure 4 , Figure 5 and Figure 6 In some embodiments, the first step groove 423 is provided on the end surface of the annular sealing cover 422 facing the abutting convex ring 432, and a second step groove 424 is provided on the annular sealing cover 422 adjacent to the first step groove 423, and a first sealing ring 70 is provided in the second step groove 424. The locking nut 431 is inserted into the second step groove 424 to press the first sealing ring 70 into the second step groove 424, which is not only conducive to improving the tightness of the second locking member 43 against the first sealing ring 70, but also can form a labyrinth sealing structure to improve the sealing effect.

[0065] Please refer to Figure 3 , Figure 4 , Figure 5 and Figure 6In some embodiments, a third step groove 425 is provided on the annular sealing cover 422 near the second step groove 424, and the end of the locking nut 431 away from the supporting convex ring 432 is inserted into the third step groove 425, which can form a labyrinth seal structure and improve the sealing effect. It should be noted that the first step groove 423, the second step groove 424 and the third step groove 425 are all annular step grooves, and the second step groove 424 connects the first step groove 423 and the third step groove 425, which can form a labyrinth seal groove structure with good sealing performance.

[0066] Please refer to Figure 2 , Figure 7 , Figure 8 and Fig. 9 In some embodiments, the first end surface of the rear end bearing seat 31 is provided with a first annular groove 311 for accommodating and positioning the first annular seal 32, the outer circumference of the first annular seal 32 is in liquid-tight contact with the inner surface of the first annular groove 311, and the first locking member 33 includes an internal thread sleeve 331 sleeved on the rear end 22 of the main shaft 2 and an external pressing end cover 332 radially extending outward from the first end of the internal thread sleeve 331, and the second end of the internal thread sleeve 331 is inserted into the first annular groove 311, so that the outer circumference of the internal thread sleeve 331 is in liquid-tight contact with the inner circumference of the first annular seal 32. At the same time, the external pressing end cover 332 is covered on the notch of the first annular groove 311 to press and seal the first annular seal 32 in the first annular groove 311. The above structural arrangement can form a labyrinth seal structure and help improve the sealing effect.

[0067] Please refer to Figure 2 , Figure 7 , Figure 8 and Fig. 9 In some embodiments, an inner pressing end cover 333 for cooperating with the rear end 22 of the main shaft 2 is provided in the internal threaded sleeve 331, and the inner pressing end cover 333 is in liquid-tight contact with the rear end 22 of the main shaft 2. The second end of the rear end bearing seat 31 extends radially inward and is provided with a sealing reinforcement ring 312 for being sleeved on the rear end 22 of the main shaft 2. The sealing reinforcement ring 312, the center annular hole 313 of the rear end bearing seat 31, the first annular seal 32 and the rear end 22 of the main shaft 2 are enclosed to form a closed annular sealing cavity, and the second bearing assembly 50 is accommodated in the annular sealing cavity, which is conducive to preventing oil from leaking into the interior of the tool holder housing 1 and causing oil to corrode the direct drive motor 5, causing the direct drive motor 5 to be short-circuited and damaged and affecting the normal operation of the direct drive motor 5.

[0068] Please refer to Figure 1 , Fig.10 and Fig.12In some embodiments, the spindle mechanism with a quick-release and quick-install sealing structure also includes a wire box assembly 60 disposed on the tool holder housing 1. The wire box assembly 60 includes a box body 601, a terminal row 602 disposed inside the box body 601, a wire electrically connected to the terminal row 602, and an outlet wire seal 603 and / or an inlet wire seal disposed in the outlet wire hole 604 and / or the inlet wire hole. The outlet wire seal 603 and / or the inlet wire seal are used to seal the outlet wire hole 604 and / or the inlet wire hole, which can prevent oil and water from entering the box body 601 and causing short-circuit damage to electrical components. Specifically, the box body 601 is disposed on the sealing gland 34. When the sealing gland 34 closes the disassembly and assembly port 13 on the tool holder housing 1, the box body 601 can be installed on the tool holder housing 1 through the sealing gland 34.

[0069] Please refer to Figures 10 to 13 The spindle mechanism with a quick-release and quick-install sealing structure provided by the embodiment of the utility model also includes a direct-drive motor 5. The tool holder housing 1 has a columnar mounting cavity 11 inside. The spindle 2 is accommodated in the tool holder housing 1. The nose end 21 of the spindle 2 and the rear end 22 of the spindle 2 extend to the outside of the tool holder housing 1 respectively. The direct-drive motor 5 is accommodated in the tool holder housing 1. On the one hand, the compactness of the spindle mechanism structure is improved, and on the other hand, it is conducive to reducing the volume of the spindle mechanism structure. The direct-drive motor 5 includes a stator assembly 51 fixedly arranged inside the tool holder housing 1 and a rotor assembly 52 sleeved on the spindle 2. The rotor assembly 52 is located in the stator assembly 51, and the rotor assembly 52 is spaced apart from the stator assembly 51. The rotor assembly 52 includes a permanent magnet and a rotor bracket. The rotor bracket is sleeved on the main shaft 2, and the permanent magnet is sleeved on the rotor bracket, and the permanent magnet is fixed on the rotor bracket. The permanent magnet can provide the necessary air gap magnetic field for the direct drive motor 5. The winding on the stator assembly 51 is connected to three-phase alternating current. After the current is passed, a rotating magnetic field is formed in the winding. Since the permanent magnet is installed on the rotor bracket, the magnetic poles of the permanent magnet are fixed. According to the principle that like poles attract each other and opposite poles repel each other, the rotating magnetic field generated in the stator assembly 51 drives the permanent magnet to rotate. Since the permanent magnet is fixedly connected to the rotor bracket, the rotor bracket is driven to rotate, thereby converting electrical energy into mechanical energy. Among them, the rotor assembly 52 is fixedly connected to the main shaft 2, and the central axis of the rotor assembly 52 is colinear with the central axis of the main shaft 2, so that when the direct drive motor 5 is working, the rotor assembly 52 can directly drive the main shaft 2 to rotate synchronously, which greatly reduces the complexity of the power transmission system, ensures that the rotor assembly 52 and the main shaft 2 have good concentricity, and there is no need for the drive motor and the main shaft mechanism to be connected through gear transmission and there is no reverse clearance, which has high transmission efficiency and high transmission accuracy.

[0070] Please refer to Figure 1 , Figure 2 , Fig.10 and Fig.11In some embodiments, the first bearing assembly 40 includes at least two first bearing units, each of which includes two first bearings 401 arranged in pairs and side by side, and the second bearing assembly 50 includes at least one second bearing unit, each of which includes two second bearings 501 arranged in pairs and side by side, so that the main shaft 2 has the characteristics of high speed and high rigidity when rotating.

[0071] Please refer to Fig.10 and Fig.11 In some embodiments, the spindle mechanism with a quick-release and quick-install sealing structure further includes a broaching mechanism 6 for locking the tool to the nose end 21 of the spindle 2. The spindle 2 is provided with a sliding hole 23 extending axially therethrough. The broaching mechanism 6 includes a broaching shaft 61 slidably disposed in the sliding hole 23 along the axial direction, an elastic member 62 for pushing the broaching shaft 61 toward the broaching position, a first abutting member 63 slidably sleeved on the broaching shaft 61 and fixedly connected to the spindle 2, and a second abutting member 64 fixedly sleeved on the broaching shaft 61. The broaching shaft 61 has a penetrating air delivery channel 30 along its axial direction. Specifically, the elastic member 62 is a spring sleeved on the broaching shaft 61, the first end of the spring abuts against the first abutting member 63, and the second end of the spring abuts against the second abutting member 64. Furthermore, in order to facilitate the installation of the spring and reduce the friction between the broaching shaft 61 and the sliding hole 23, the second abutting member 64 is a locking nut, and an external thread matching the locking nut is provided at a position on the broaching shaft 61 corresponding to the locking nut, the locking nut is screwed onto the broaching shaft 61, and the locking nut is slidably disposed in the sliding hole 23. Furthermore, in order to reduce the friction between the broaching shaft 61 and the sliding hole 23, an expanded diameter section 611 is provided at one end of the broaching shaft 61 away from the locking nut, and the expanded diameter section 611 is slidably disposed in the sliding hole 23, and a gap is provided between the portion of the broaching shaft 61 between the expanded diameter section 611 and the locking nut and the sliding hole 23.

[0072] Please refer to Fig.10 and Fig.11 In some embodiments, the spindle mechanism with a quick-release and quick-install sealing structure also includes a knife loosening mechanism 7 for pushing the knife broaching shaft 61 toward the knife loosening position. The knife loosening mechanism 7 is disposed on the tool holder housing 1 at a position adjacent to the rear end 22 of the spindle 2. The knife loosening mechanism 7 includes a hydraulic cylinder 71 fixedly connected to the tool holder housing 1 and a knife push rod 72 for pushing the knife broaching shaft 61 toward the knife loosening position. The knife push rod 72 is connected to the piston rod of the hydraulic cylinder 71. When in use, the knife broaching function of the knife loosening mechanism 7 is realized by driving the knife push rod 72 through the hydraulic cylinder 71. When the hydraulic cylinder 71 releases pressure and stops driving the knife push rod 72, the spring can push the knife broaching shaft 61 to the knife broaching position, thereby realizing the knife broaching function of the automatic knife broaching mechanism 6.

[0073] Please refer to Fig.10 and Fig.11In some embodiments, the spindle mechanism with a quick-release and quick-install sealing structure further includes an inertia mechanism 10, which is sleeved on the spindle 2 and located between the first bearing assembly 40 and the rotor assembly 52, which can both increase the inertia of the spindle 2 during operation and reduce the inertia impact when the spindle 2 is started and stopped. A cooling circulation channel 20 for circulating coolant is provided on the tool holder housing 1 and / or the stator assembly 51, and a measuring assembly 8 for measuring various performance parameters of the spindle 2 is provided at a position corresponding to the rear end 22 of the spindle 2 on the tool holder housing 1, and the measuring assembly 8 includes a measuring element 81 provided on the first locking member 33 and a sealing element 82 for sealing the measuring assembly 8.

[0074] Please refer to Fig.12 In some of the embodiments, the spindle mechanism with a quick-release and quick-install sealing structure also includes a tool holder seat 9 supporting the tool holder housing 1, a dovetail guide rail 15 is provided on the tool holder housing 1, and a dovetail groove 91 that slides with the dovetail guide rail 15 is provided on the tool holder seat 9.

[0075] The embodiment of the utility model also provides a gear processing machine tool, which includes a spindle mechanism with a quick-release and quick-installation sealing structure provided in any of the above embodiments. Since the gear processing machine tool has all the technical features of the spindle mechanism with a quick-release and quick-installation sealing structure provided in any of the above embodiments, it has the same technical effect as the spindle mechanism with a quick-release and quick-installation sealing structure.

[0076] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A spindle mechanism with a quick-release and quick-install sealing structure, characterized in that: include: A tool holder housing has a columnar mounting cavity inside, the front end of the tool holder housing has a necking opening communicating with the mounting cavity, and the rear end of the tool holder housing has a disassembly opening communicating with the mounting cavity; A spindle, accommodated in the tool holder housing; A first bearing assembly, used for rotatably mounting the nose end of the spindle in the necking opening; A second bearing assembly, used for rotatably mounting the rear end of the main shaft in the disassembly opening; and A first sealing assembly is used to seal the rear end of the main shaft, the first sealing assembly includes a rear end bearing seat rotatably mounted on the rear end of the main shaft, a first annular seal that presses and seals the second bearing assembly in the annular sealing cavity of the rear end bearing seat, a first locking member for locking the first annular seal on the rear end bearing seat, a sealing gland for closing the disassembly and assembly port and confining the rear end bearing seat in the disassembly and assembly port, and a bolt for detachably mounting the sealing gland on the tool holder housing, the rear end of the main shaft is detachably connected to the first locking member, and the first annular seal is in sliding sealing contact with the rear end bearing seat and / or the first locking member and / or the rear end of the main shaft.

2. The spindle mechanism with a quick-release and quick-install sealing structure according to claim 1, characterized in that: The spindle mechanism with a quick-release and quick-install sealing structure also includes a second sealing component and a direct-drive motor for sealing the nose end of the spindle. The direct-drive motor includes a stator component fixedly arranged inside the tool holder housing and a rotor component sleeved on the spindle. The second sealing component includes a second annular seal and a third annular seal for pressing and sealing the first bearing component in the necking mouth. The second annular seal is arranged at the connection between the necking mouth and the mounting cavity. The second annular seal is clamped and fixed between the stator component and the inner side wall of the tool holder housing. The third annular seal is arranged at the mouth of the necking mouth. The second sealing component also includes a second locking piece for locking the third annular seal to the nose end of the spindle. The nose end of the spindle is threadedly connected to the second locking piece.

3. The spindle mechanism with a quick-release and quick-install sealing structure according to claim 2, characterized in that: The second locking member is a locking nut, and the nose end of the main shaft is provided with an external thread that matches the internal thread of the locking nut.

4. The spindle mechanism with a quick-release and quick-install sealing structure according to claim 2, characterized in that: The second locking member includes a locking nut and a supporting protrusion extending radially outward from one end of the locking nut. A first step groove for the supporting protrusion to abut is provided on the corresponding end surface of the third annular seal. The supporting protrusion is accommodated in the first step groove and is in liquid-tight contact with the third annular seal.

5. The spindle mechanism with a quick-release and quick-install sealing structure according to claim 4, characterized in that: The third annular seal includes an annular sealing body for inserting into the necking opening to press against the first bearing assembly and an annular sealing cover extending radially outward from one end of the annular sealing body, wherein the annular sealing cover is arranged at the mouth of the necking opening and is in liquid-tight contact with the necking opening.

6. The spindle mechanism with a quick-release and quick-install sealing structure according to claim 5, characterized in that: The first step groove is arranged on the end surface of the annular sealing cover facing the supporting convex ring, and a second step groove is arranged on the annular sealing cover adjacent to the first step groove. A first sealing ring is arranged in the second step groove, and the locking nut is inserted into the second step groove to press the first sealing ring into the second step groove.

7. The spindle mechanism with a quick-release and quick-install sealing structure according to claim 6, characterized in that: A third step groove is provided on the annular sealing cover adjacent to the second step groove, and an end of the locking nut away from the supporting convex ring is inserted into the third step groove.

8. The spindle mechanism with a quick-release and quick-install sealing structure according to any one of claims 1 to 7, characterized in that: The first end surface of the rear end bearing seat is provided with a first annular groove for accommodating and positioning the first annular seal, the outer circumferential surface of the first annular seal is in liquid-tight contact with the inner surface of the first annular groove, the first locking member includes an internal threaded sleeve sleeved on the rear end of the main shaft and an external pressing end cover extending radially outward from the first end of the internal threaded sleeve, the second end of the internal threaded sleeve is inserted into the first annular groove so that the outer circumferential surface of the internal threaded sleeve is in liquid-tight contact with the inner circumferential surface of the first annular seal, and the pressing end cover is covered on the notch of the first annular groove to press and seal the first annular seal in the first annular groove.

9. The spindle mechanism with a quick-release and quick-install sealing structure according to claim 8, characterized in that: The internal threaded sleeve is provided with an inner pressure end cover for cooperating with and resisting the rear end of the main shaft, and the inner pressure end cover is in contact with the rear end liquid seal of the main shaft. The second end of the rear end bearing seat extends radially inward and is provided with a sealing reinforcement ring for being sleeved on the rear end of the main shaft. The sealing reinforcement ring, the central annular hole of the rear end bearing seat, the first annular seal and the rear end of the main shaft enclose a closed annular sealing cavity.

10. A gear processing machine tool, characterized in that: It comprises a spindle mechanism with a quick-release and quick-install sealing structure as claimed in any one of claims 1 to 9.

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