A main shaft structure for a gear grinding machine

Abstract

This invention discloses a spindle structure for a gear grinding machine, belonging to the field of turning technology. It mainly includes a disassembly and assembly assembly, a housing, a mandrel, and connecting rods. The mandrel is rotatably fitted onto the housing. A connecting rod is provided at each end of the mandrel, and a disassembly and assembly assembly is provided at each end of the mandrel. Each disassembly and assembly assembly includes a connecting sleeve, a connector, a sliding head, a connecting nozzle, a stabilizing plate, a slip ring, and an extension arm. The end of the mandrel has a coaxial insertion hole. When the connecting rod is inserted into the insertion hole of the mandrel, a pressure chamber is formed between the insertion hole and the connecting rod. The connecting sleeve is fitted onto the mandrel, and its inner cavity communicates with the pressure chamber. The sliding head slides axially along the mandrel onto the housing. The stabilizing plate is mounted on the connecting rod. The slip ring is connected to the sliding head and is located near the inner end of the stabilizing plate. The extension arm is connected to the sliding head and is located near the outer end of the stabilizing plate. This spindle structure for a gear grinding machine can solve the problem of vibration caused by multiple cutting tools.

Description

Technical Field

[0001] This invention relates to the field of turning technology, and more specifically to a spindle structure for a gear grinding machine. Background Technology

[0002] Traditional single-head electric spindles for gear grinding machines often require multiple clamping and switching processes during machining, which is time-consuming. Existing double-head electric spindles perfectly solve these problems. Because its two spindle heads can be equipped with two different sizes of grinding wheel heads, different processes can be performed simultaneously, improving the working efficiency of the gear grinding machine. However, when one grinding wheel head is working, the other end is idle. Compared with traditional single-head electric spindles, the grinding wheel head increases the rotational inertia and mass of the spindle, which can easily increase the spindle runout and thus affect the machining accuracy.

[0003] Therefore, it is necessary to provide a new spindle structure for gear grinding machines. Summary of the Invention

[0004] Based on the aforementioned problems in the existing technology, the purpose of this invention is to provide a spindle structure for a gear grinding machine that can solve the problem of vibration caused by multiple cutting tools.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A spindle structure for a gear grinding machine is provided, including a disassembly and assembly assembly, a housing, a mandrel, and connecting rods. The mandrel passes through and rotatably engages with the housing. A connecting rod is provided at each end of the mandrel, and a disassembly and assembly assembly is provided at each end of the mandrel. Each disassembly and assembly assembly includes a connecting sleeve, a connector, a sliding head, a connecting nozzle, a stabilizing disc, a slip ring, and an extension arm. An insertion hole is coaxially provided at the end of the mandrel. When the connecting rod is inserted into the insertion hole of the mandrel, there is a gap between the connecting rod and the insertion hole of the mandrel. The partition has a pressure chamber. The connecting sleeve is fitted onto the mandrel, and the connecting sleeve has an inner cavity that communicates with the pressure chamber. The sliding head slides along the axial direction of the mandrel onto the housing. The stabilizing disc is mounted on the connecting rod. The slip ring is connected to the sliding head and is close to the inner end of the stabilizing disc. The extension arm is connected to the sliding head and is close to the outer end of the stabilizing disc. The connector is mounted on the outer end of the connecting sleeve and communicates with the inner cavity of the connecting sleeve. The connecting nozzle is mounted on the sliding head and points towards the outer end of the connecting sleeve.

[0006] Furthermore, the slip ring is elastically telescopically connected to the sliding head along the axial direction of the spindle, and the slip ring slides on the sliding head along the axial direction of the spindle. An elastic element is installed between the slip ring and the sliding head, and the elastic element applies a spring force to the slip ring to drive it to move closer to the stabilizing disk.

[0007] Furthermore, the connecting rod is provided with a locking piece at one end corresponding to the mandrel, and the insertion hole of the mandrel is provided with an alignment groove suitable for the locking piece to pass through. The insertion hole of the mandrel and the bottom of the alignment groove are provided with a connected slot. When the locking piece is aligned with the alignment groove and inserted, the locking piece is received in the slot.

[0008] Furthermore, a retaining ring is installed on the side of the stabilizing disk near the extension arm. The inner circumference of the retaining ring is provided with a first retaining surface. A retaining boss is protruding on the end face of the extension arm near the stabilizing disk. A second retaining surface is provided on the outer circumference of the retaining boss. When the first retaining surface and the second retaining surface overlap radially, the interference fit between the first retaining surface and the second retaining surface generates contact friction.

[0009] Furthermore, the mandrel has a connecting positioning groove in the insertion hole and at the bottom of the slot, and the end of the connecting rod has a positioning tip. When the positioning tip of the connecting rod is inserted into the positioning groove of the mandrel, the mandrel and the connecting rod are coaxially positioned.

[0010] Furthermore, the connecting rod has a locating shoulder protruding from its periphery. When the connecting rod is inserted into the insertion hole of the mandrel, the locating end face of the locating shoulder seals against the end face of the mandrel. At the same time, a pressure chamber is formed between the outer peripheral wall of the connecting rod and the inner peripheral wall of the insertion hole of the mandrel. The outer peripheral wall of the mandrel has a through hole communicating with the pressure chamber. The connecting sleeve has a first sleeve opening at one end near the mandrel. The sleeve opening fits onto the mandrel, and the outer end of the through hole communicates with the inner cavity of the connecting sleeve. The connecting sleeve has a second sleeve opening at one end away from the mandrel. The outer peripheral wall of the locating shoulder has a sealing surface. When the connecting rod is inserted into the insertion hole of the mandrel, the second sleeve opening fits onto the sealing surface of the connecting rod.

[0011] Furthermore, the connecting rod has a beveled surface protruding on the sealing surface, and the angle formed between the beveled surface and the axis of the mandrel faces the mandrel. The inner surface of the connecting sleeve is covered with a sealing layer, and the connecting sleeve has a corner surface located on the inner edge of the sleeve opening. When the connecting rod and the mandrel are inserted into the insertion hole and the sleeve opening is fitted onto the sealing surface of the connecting rod, the beveled surface and the corner surface abut against each other.

[0012] Furthermore, the mandrel has a clearance groove in the insertion hole and at the top of the alignment groove, which is connected to the alignment groove. The minimum diameter of the clearance groove is greater than the maximum diameter of the locking piece.

[0013] Furthermore, the end face of the extension arm near the stabilizing disk is provided with a pushing surface.

[0014] Furthermore, the connector is a cylindrical structure with openings at both ends. The connector has an outward-facing interface one and an inward-facing interface two. Interface one is suitable for insertion when the connecting nozzle is aligned. A plug is movably provided on the inner side of interface two. When the connecting nozzle is inserted into interface one and the plug is pushed away from interface two, the connector connects to the inner cavity of the connecting sleeve. When the connecting nozzle is withdrawn from interface one, the plug seals on interface two and automatically disconnects the connection between the connector and the inner cavity of the connecting sleeve. The plug has a spherical structure, and the side of the plug away from interface two elastically abuts against the reset member.

[0015] The beneficial effects of this invention are as follows: This invention provides a spindle structure for a gear grinding machine, including a disassembly and assembly assembly, a housing, a mandrel, and a connecting rod. The mandrel passes through and rotatably fits onto the housing. A connecting rod is provided at each end of the mandrel, and a disassembly and assembly assembly is provided at each end of the mandrel. The disassembly and assembly assembly includes a connecting sleeve, a connector, a sliding head, a connecting nozzle, a stabilizing disc, a slip ring, and an extension arm. An insertion hole is coaxially provided at the end of the mandrel. When the connecting rod is inserted into the insertion hole of the mandrel, a pressure chamber is formed between the insertion hole of the connecting rod and the insertion hole of the mandrel. The connecting sleeve is fitted onto the mandrel, and the interior of the connecting sleeve has an inner cavity that communicates with the pressure chamber. The sliding head slides along the axial direction of the mandrel onto the housing. The stabilizing disc is mounted on the connecting rod. The slip ring is connected to the sliding head and is close to the inner end of the stabilizing disc. The extension arm is connected to the sliding head and is close to the outer end of the stabilizing disc. The connector is installed on the outer end of the connecting sleeve and communicates with the inner cavity of the connecting sleeve. The connecting nozzle is installed on the sliding head and points towards the connecting sleeve. On the outer end, when the connecting rod needs to be installed and fixed to the mandrel, the sliding head moves closer to the mandrel, allowing the extension arm to move the stabilizing plate to the insertion hole of the connecting rod into the mandrel and into place. At the same time, the connecting nozzle is inserted into the connector of the connecting sleeve. The connecting nozzle is used to draw a vacuum, thereby creating a low pressure in the pressure chamber. Under the action of the pressure difference, the connecting rod is forced to lock and connect to the end of the mandrel. Furthermore, when it is necessary to solve the problem of increased rotational inertia and mass of the mandrel caused by an idle tool on the other end, the connecting nozzle is connected to the connector and the pressure chamber is adjusted to depressurize or increase pressure. Then, the sliding head can be moved away from the mandrel, thereby pushing the connecting rod away from the mandrel through the slip ring on one side. Thus, since the idle tool on one end of the mandrel is disconnected from the mandrel, the problem of increased rotational inertia and mass of the mandrel caused by the idle tool is solved. This effectively solves the problem that the idle tool on the other end increases the rotational inertia and mass of the mandrel compared to traditional single-head electric spindles, avoiding increased mandrel runout and affecting machining accuracy. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a three-dimensional structural diagram of a spindle structure for a gear grinding machine provided in an embodiment of the present invention.

[0018] Figure 2 This is a cross-sectional schematic diagram of a gear grinding machine spindle structure provided in an embodiment of the present invention, in the first working state.

[0019] Figure 3 for Figure 2 A partial view of a spindle structure for a gear grinding machine is shown.

[0020] Figure 4 for Figure 3 An enlarged schematic diagram of region A in the middle.

[0021] Figure 5 for Figure 3 Enlarged schematic diagram of region B in the middle.

[0022] Figure 6 for Figure 3 A magnified view of region C in the middle.

[0023] Figure 7 This is an exploded view of the disassembly and assembly components provided in an embodiment of the present invention.

[0024] Figure 8 This is a three-dimensional structural diagram of the mandrel provided in an embodiment of the present invention.

[0025] Figure 9 This is a three-dimensional structural diagram of the connecting rod provided in an embodiment of the present invention.

[0026] Figure 10 for Figure 3 The diagram shows a spindle structure for a gear grinding machine in the second working state.

[0027] Figure 11 for Figure 10 A magnified diagram of region D in the middle.

[0028] Figure 12 for Figure 3 The diagram shows a spindle structure for a gear grinding machine in its third working state.

[0029] Figure 13 for Figure 12 A magnified view of region E in the middle.

[0030] Figure 14 for Figure 3 The diagram shows a spindle structure for a gear grinding machine in its fourth operating state.

[0031] Figure 15 for Figure 14 A magnified diagram of region F in the middle.

[0032] The reference numerals in the figures are as follows: 10. Assembly / Disassembly component; 1. Connecting sleeve; 11. Sleeve opening one; 12. Sleeve opening two; 121. Corner surface; 14. Sealing layer; 2. Connector; 21. Interface one; 22. Interface two; 23. Plug; 24. Reset component; 3. Sliding head; 4. Connecting nozzle; 41. Plug; 42. Inlet / outlet; 5. Stabilizing plate; 51. Snap ring; 511. Snap-fit ​​surface one; 6. Slip ring; 7. Extension arm 71. Pushing surface; 72. Snap-fit ​​boss; 721. Snap-fit ​​surface two; 8. Elastic element; 9. Pressure chamber; 20. Sleeve; 30. Mandrel; 301. Alignment groove; 302. Snap groove; 303. Through hole; 304. Circumvention groove; 305. Positioning groove; 40. Connecting rod; 401. Positioning center; 402. Locking piece; 403. Positioning shoulder; 404. Positioning end face; 405. Sealing surface; 406. Angled surface. Detailed Implementation

[0033] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0034] It should be noted that when a component is referred to as "connected to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0035] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0036] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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 specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0037] Throughout this specification, reference to "an embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment is included in at least one embodiment of this application. Therefore, the phrases "in one embodiment," "in some embodiments," or "in some of these embodiments" appear in various places throughout the specification, and not all refer to the same embodiment. Furthermore, in one or more embodiments, a particular feature, structure, or characteristic may be combined in any suitable manner.

[0038] Please refer to Figures 1 to 15As shown, the spindle structure for a gear grinding machine provided by the present invention will now be described. This spindle structure includes a disassembly / assembly assembly 10, a housing 20, a mandrel 30, and connecting rods 40. The mandrel 30 passes through and rotatably engages with the housing 20. A connecting rod 40 is provided at each end of the mandrel 30, and a cutting tool (not shown) is mounted on the connecting rod 40, allowing two cutting tools to be mounted simultaneously at both ends of the mandrel 30, enabling composite machining without tool changes. Each end of the mandrel 30 is provided with a disassembly / assembly assembly 10, which includes a connecting sleeve 1, a connector 2, a sliding head 3, a connecting nozzle 4, a stabilizing disc 5, a slip ring 6, and an extension arm. 7. The end of the mandrel 30 is coaxially provided with a insertion hole. When the connecting rod 40 is inserted into the insertion hole of the mandrel 30, a pressure chamber 9 is formed between the connecting rod 40 and the insertion hole of the mandrel 30. The connecting sleeve 1 is sleeved on the mandrel 30, and the interior of the connecting sleeve 1 has an inner cavity that communicates with the pressure chamber 9. The sliding head 3 slides along the axial direction of the mandrel 30 and is fitted onto the sleeve 20. The stabilizing disk 5 is installed on the connecting rod 40. The slip ring 6 is connected to the sliding head 3 and is close to the inner end of the stabilizing disk 5. The extension arm 7 is connected to the sliding head 3 and is close to the outer end of the stabilizing disk 5. The connector 2 is installed on the outer side of the connecting sleeve 1. The end side and the connector 2 connect to the inner cavity of the connecting sleeve 1. The connecting nozzle 4 is installed on the sliding head 3 and points to the outer end side of the connecting sleeve 1. So when the connecting rod 40 needs to be installed and fixed to the mandrel 30, the sliding head 3 moves closer to the mandrel 30, which allows the extension arm 7 to drive the stabilizing plate 5 to move until the connecting rod 40 is inserted into the insertion hole of the mandrel 30 and into place. At the same time, the connecting nozzle 4 is inserted into the connector 2 of the connecting sleeve 1. The connecting nozzle 4 is used to draw a vacuum, thereby creating a low pressure in the pressure chamber 9. Under the action of the pressure difference, the connecting rod 40 is forced to lock and connect to the end of the mandrel 30. And when it is necessary to solve the problem of the idle tool on the other end causing an increase When dealing with issues related to the rotational inertia and mass of the spindle 30, the pressure chamber 9 is depressurized or pressurized by connecting the nozzle 4 to the connector 2 and adjusting the pressure. Subsequently, the sliding head 3 can move away from the spindle 30, thereby pushing the connecting rod 40 away from the spindle 30 through the slip ring 6 on one side. As a result, the idle tool at one end of the spindle 30 is disconnected from the spindle 30, solving the problem of increased rotational inertia and mass of the spindle 30 caused by the idle tool. This effectively solves the problem of increased rotational inertia and mass of the spindle compared to traditional single-head electric spindles caused by the idle tool at the other end, avoiding increased spindle runout and affecting machining accuracy.

[0039] like Figure 3 As shown, when the sliding head 3 moves close to the spindle 30, the extension arm 7 drives the stabilizing plate 5 to insert the connecting rod 40 into the insertion hole of the spindle 30 and into place. At the same time, it drives the connecting nozzle 4 to insert into the connector 2 of the connecting sleeve 1. The connecting nozzle 4 is used to draw a vacuum to form a low pressure in the pressure chamber 9, which forces the connecting rod 40 to lock and connect to the end of the spindle 30. Then the sliding head 3 needs to move away from the spindle 30 until the connecting nozzle 4 is pulled out from the connector 2, and the spindle 30 can then operate normally.

[0040] like Figure 5 As shown, in some embodiments, the slip ring 6 is a ball-bearing structure. In this embodiment, the slip ring 6 has a fixed end and a movable end that can rotate relative to each other. A ball is sandwiched between the fixed end and the movable end. The ball is axially limited between the fixed end and the movable end by a ball retainer. The slip ring 6 is located off-center from the axis of the connecting rod 40. The fixed end of the slip ring 6 is connected to the sliding head 3. The movable end of the slip ring 6 faces the inner end face of the stabilizing disk 5, that is, the movable end of the slip ring 6 faces the end of the stabilizing disk 5 near the spindle 30. The connecting rod 40 is inserted and locked to the end of the spindle 30. Then the sliding head 3 moves away from the spindle 30 and is pulled out of the connector 2 from the connecting nozzle 4. At the same time, the movable end of the slip ring 6 abuts against the stabilizing plate 5. On the one hand, the slip ring 6 can abut against the stabilizing plate 5 to apply a supporting force to the connecting rod 40 at a position away from the axis, stabilizing the rotational movement of the connecting rod 40 and effectively reducing the vibration of the connecting rod 40. On the other hand, when it is necessary to push the connecting rod 40 away from the spindle 30, the slip ring 6 can also apply an elastic pushing force to the stabilizing plate 5 to drive the connecting rod 40 away from the spindle 30. In this way, the slip ring 6 can not only push the connecting rod 40 to move, but also provide support for the connecting rod 40 when it rotates with the spindle 30, thereby resisting the vibration of the connecting rod 40, the tool, and the spindle 30.

[0041] like Figure 3 As shown, in some embodiments, the slip ring 6 is elastically telescopically connected to the sliding head 3 along the axial direction of the spindle 30. Specifically, the slip ring 6 is slidably fitted onto the sliding head 3 along the axial direction of the spindle 30, and an elastic element 8 is installed between the slip ring 6 and the sliding head 3. The elastic element 8 applies a spring force to the slip ring 6, driving the slip ring 6 to move closer to the stabilizing disk 5, thereby ensuring that the slip ring 6 always maintains abutting contact with the stabilizing disk 5. In addition, as... Figure 14 and Figure 15 As shown, when the connecting rod 40 is disengaged from the spindle 30, the slip ring 6, under the elastic force of the elastic element 8, will clamp the slip ring 6 and the extension arm 7 on the opposite end faces of the stabilizing disk 5, preventing the stabilizing disk 5 from disengaging from the connection between it and the sliding head 3.

[0042] like Figure 8 and Figure 9As shown, in some embodiments, the end of the connecting rod 40 corresponding to the mandrel 30 is provided with a locking piece 402. The insertion hole of the mandrel 30 is provided with an alignment groove 301 suitable for the locking piece 402 to pass through. When the locking piece 402 is aligned with the alignment groove 301 and inserted, rotating the mandrel 30 causes the locking piece 402 to shift relative to the alignment groove 301, thereby axially limiting the locking piece 402 on the mandrel 30, thus further improving the connection reliability between the connecting rod 40 and the mandrel 30. It should be understood that the design of locking the connecting rod 40 and the mandrel 30 through the pressure chamber 9 in this embodiment, on the one hand, enables the connecting rod 40 and the mandrel 30 to be axially positioned accurately and consistently. On the other hand, the axial abutment between the connecting rod 40 and the mandrel 30 can resist the circumferential deflection displacement of the connecting rod 40 relative to the mandrel 30 through frictional resistance. Specifically, the insertion hole of the mandrel 30 and the bottom of the alignment groove 301 are provided with a communicating slot 302, such as... Figure 3 As shown, when the locking piece 402 is aligned with and inserted into the alignment slot 301, the locking piece 402 is received in the slot 302.

[0043] like Figure 5 As shown, in some embodiments, in order to achieve the rotation of the connecting rod 40 relative to the spindle 30 to achieve the alignment or offset of the locking plate 402 and the alignment groove 301, a retaining ring 51 is installed on the side of the stabilizing disk 5 near the extension arm 7. The inner circumference of the retaining ring 51 is provided with a first retaining surface 511, and a retaining boss 72 is protruding on the end face of the extension arm 7 near the stabilizing disk 5. The outer circumference of the retaining boss 72 is provided with a second retaining surface 721. When the first retaining surface 511 and the second retaining surface 721 coincide radially, the interference fit between the first retaining surface 511 and the second retaining surface 721 generates contact friction force, such as... Figure 5 As shown, when the sliding head 3 moves away from the spindle 30 and disengages from the first engagement surface 511 and the second engagement surface 721, the sliding head 3 no longer affects the rotation of the connecting rod 40 and the stabilizing disk 5, such as... Figure 10 As shown, when the sliding head 3 moves close to the spindle 30 and the connecting nozzle 4 is inserted into the connector 2 to adjust the pressure chamber 9, the second snapping surface 721 on the extension arm 7 and the first snapping surface 511 of the snapping ring 51 on the stabilizing disc 5 are inserted and interference-fitted. At this time, because the axial clamping force between the connecting rod 40 and the spindle 30 disappears due to the pressure chamber 9 being depressurized, the connecting rod 40 can deflect relative to the spindle 30. By controlling the rotation of the spindle 30, the spindle 30 is rotated relative to the connecting rod 40 until the locking piece 402 is aligned with the alignment groove 301. Figure 14As shown, the sliding head 3 then moves away from the spindle 30, which in turn moves the connecting rod 40 away from the spindle 30 until the locking piece 402 disengages from the alignment groove 301. Then, the spindle 30 only rotates the connecting rod 40 at the other end. Similarly, when it is necessary to insert the connecting rod 40 into the slot 302 and lock it axially, simply rotate the spindle 30 until the alignment groove 301 aligns with the locking piece 402 of the connecting rod 40, and the sliding head 3 moves closer to the spindle 30 until the locking piece 402 passes through the alignment groove 301 and enters the slot 302. Subsequently, the spindle 30 rotates again until the alignment groove 301 and the locking piece 402 are deflected, thus axially limiting the locking piece 402 and the connecting rod 40 on the spindle 30. It is understood that, in order to achieve precise alignment between the locking piece 402 and the alignment groove 301, a position sensor is installed between the housing 20 and the spindle 30 to monitor the rotational position of the spindle 30. It is understood that the position sensor can be a potentiometer, an optical encoder, a Hall effect sensor, a magnetoresistive sensor, etc.

[0044] like Figure 10 and Figure 11 As shown, in some embodiments, the end face of the extension arm 7 near the stabilizing disk 5 is provided with a pushing surface 71, and when the pushing surface 71 of the extension arm 7 abuts against the stabilizing disk 5, a thrust is applied to the stabilizing disk 5 to move close to the spindle 30.

[0045] In some embodiments, the retaining ring 51 is made of a material with a certain degree of elasticity, so that when the retaining ring 51 and the retaining boss 72 are pressed together, the retaining ring 51 will produce a small amount of elastic deformation, so that the retaining ring 51 and the retaining boss 72 are in close contact and have sufficient frictional resistance to temporarily lock the stabilizing disk 5 and the extension arm 7.

[0046] like Figure 2 As shown, in some embodiments, a communicating clearance groove 304 is provided in the insertion hole of the mandrel 30 and at the top of the alignment groove 301. The minimum diameter of the clearance groove 304 is greater than the maximum diameter of the locking piece 402, so that when the locking piece 402 moves out of the alignment groove 301 and is located in the clearance groove 304, the rotation of the mandrel 30 relative to the connecting rod 40 will not cause the two to collide.

[0047] like Figure 2 As shown, in some embodiments, the mandrel 30 has a communicating positioning groove 305 in the insertion hole and at the bottom of the slot 302, and the end of the connecting rod 40 has a positioning tip 401, so that when the positioning tip 401 of the connecting rod 40 is inserted into the positioning groove 305 of the mandrel 30, the mandrel 30 and the connecting rod 40 are coaxially positioned.

[0048] like Figure 2As shown, in some embodiments, the connecting rod 40 has a locating shoulder 403 protruding from its periphery. When the connecting rod 40 is inserted into the insertion hole of the spindle 30, the locating end face 404 of the locating shoulder 403 seals against the end face of the spindle 30. At the same time, the pressure chamber 9 is formed between the outer peripheral wall of the connecting rod 40 and the inner peripheral wall of the insertion hole of the spindle 30. The outer peripheral wall of the spindle 30 has a through hole 303 communicating with the pressure chamber 9. The connecting sleeve 1 has a sleeve opening 11 at one end near the spindle 30. The sleeve opening 11 is fitted onto the spindle 30, and the outer end of the through hole 303 communicates with the inner cavity of the connecting sleeve 1. The connecting sleeve 1 has a sleeve opening 12 at one end away from the spindle 30. The outer peripheral wall of the locating shoulder 403 has a sealing surface 405. When the insertion hole is in place, the sleeve 12 is fitted onto the sealing surface 405 of the connecting rod 40. On the one hand, the abutting end face between the connecting rod 40 and the spindle 30 is covered in the inner cavity of the connecting sleeve 1. On the other hand, when the connecting rod 40 needs to be stably connected to the spindle 30, the connecting rod 40 needs to have a sufficiently long section inserted into the insertion hole of the spindle 30. Through the abutting of the sleeve 12 of the connecting sleeve 1 and the sealing surface 405 of the connecting rod 40, and the positioning tip 401 at the end of the connecting rod 40 and the positioning groove 305 of the spindle 30, the two points on the connecting rod 40 spaced apart along the axial direction are radially positioned with the spindle 30. This helps to improve the coaxiality of the connecting rod 40 and the spindle 30 when they are inserted, as well as to improve the radial bending resistance of the connecting rod 40.

[0049] like Figure 6 As shown, in some embodiments, the connecting rod 40 has a protruding inclined surface 406 on the sealing surface 405. The angle formed between the inclined surface 406 and the axis of the spindle 30 faces the spindle 30. The inner surface of the connecting sleeve 1 is covered with a sealing layer 14. The connecting sleeve 1 has a corner surface 121 on the inner edge of the sleeve opening 12. When the connecting rod 40 and the spindle 30 are inserted into the insertion hole and the sleeve opening 12 is fitted onto the sealing surface 405 of the connecting rod 40, the inclined surface 406 and the corner surface 121 abut against each other. When a negative pressure is formed in the inner cavity of the connecting sleeve 1, the sealing layer 14 is forced to deform. The corner surface 121 on the sealing layer 14 will deform and squeeze the inclined surface 406 of the positioning shoulder 403, making the seal between the sealing surface 405 of the outer peripheral wall of the connecting rod 40 and the sleeve opening 12 of the connecting sleeve 1 more reliable.

[0050] like Figure 4As shown, in some embodiments, the connector 2 is a cylindrical structure with openings at both ends, such that the connector 2 has an outward-facing interface 21 and an inward-facing interface 22. Interface 21 is suitable for insertion when the connector 4 is aligned. A plug 23 is movably provided on the inner side of interface 22. When the connector 4 is inserted into interface 21 and the plug 23 is pushed away from interface 22, the connector 2 connects to the inner cavity of the connecting sleeve 1. When the connector 4 is withdrawn from interface 21, the plug 23 seals on interface 22 and automatically disconnects the connection between the connector 2 and the inner cavity of the connecting sleeve 1. Specifically, the plug 23 has a spherical structure. The side of the plug 23 away from interface 22 elastically abuts against the reset member 24. The reset member 24 applies an elastic force to the plug 23, forcing the plug 23 to continuously seal interface 22.

[0051] like Figure 4 As shown, in some embodiments, the connector 4 includes a plug 41 for mating with the connector 2, and an inlet / outlet 42 for connecting a pipe, wherein the medium conveyed by the inlet / outlet 42 may be, but is not limited to, gas or liquid.

[0052] In some embodiments, the outer side of the housing 20 is also equipped with a drive unit for driving the sliding heads 3 of the two disassembly and assembly components 10 to perform linear motion. The drive unit may be a linear motor module, a lead screw drive module, etc.

[0053] In some embodiments, the pressure in the pressure chamber 9 can be adjusted to have a positive pressure difference, thereby causing the connecting rod 40 to move away from the spindle 30. This, combined with the pushing force of the slip ring 6 on the stabilizing disk 5, causes the connecting rod 40 to move away from the spindle 30.

[0054] In some embodiments, to prevent excessive resistance during cutting and the deflection of the connecting rod 40 relative to the spindle 30, a limiting structure is provided in the slot 302 relative to the side of the locking piece 402. This eliminates the effect of the reaction force applied by the workpiece to the connecting rod 40 when the tool on the connecting rod 40 contacts the workpiece and applies a reaction force along the first direction of rotation to the connecting rod 40, through the abutment between the locking piece 402 and the limiting structure.

[0055] 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 within the protection scope of the present invention.

Claims

1. A spindle structure for a gear grinding machine, characterized in that: The device includes a disassembly assembly, a housing, a mandrel, and connecting rods. The mandrel passes through and rotatably engages with the housing. A connecting rod is located at each end of the mandrel, and a disassembly assembly is located at each end of the mandrel. Each disassembly assembly includes a connecting sleeve, a connector, a sliding head, a connecting nozzle, a stabilizing disc, a slip ring, and an extension arm. The end of the mandrel has a coaxial insertion hole. When the connecting rod is inserted into the insertion hole of the mandrel, a pressure chamber is formed between the connecting rod and the insertion hole of the mandrel. The connecting sleeve is fitted onto the mandrel and has an internal cavity that connects to the pressure chamber. The sliding head slides axially along the mandrel onto the housing. The stabilizing disc is mounted on the connecting rod. The slip ring is connected to the sliding head and is located near the inner end of the stabilizing disc. The extension arm is connected to the sliding head and is located near the outer end of the stabilizing disc. The connector is mounted on the outer end of the connecting sleeve and connects to the inner cavity of the connecting sleeve. The connecting nozzle is mounted on the sliding head and points towards the outer end of the connecting sleeve.

2. The spindle structure for a gear grinding machine according to claim 1, characterized in that: The slip ring is elastically telescopically connected to the sliding head along the axial direction of the spindle. The slip ring slides on the sliding head along the axial direction of the spindle, and an elastic element is installed between the slip ring and the sliding head. The elastic element applies a spring force to the slip ring to drive it to move closer to the stabilizing disk.

3. The spindle structure for a gear grinding machine according to claim 1, characterized in that: The connecting rod is provided with a locking piece at one end corresponding to the mandrel. The insertion hole of the mandrel is provided with an alignment groove suitable for the locking piece to pass through. The insertion hole of the mandrel and the bottom of the alignment groove are provided with a connecting slot. When the locking piece is aligned with the alignment groove and inserted, the locking piece is received in the slot.

4. The spindle structure for a gear grinding machine according to claim 1, characterized in that: A retaining ring is installed on the side of the stabilizing disk near the extension arm. The inner circumference of the retaining ring is provided with a first retaining surface. A retaining boss is provided on the end face of the extension arm near the stabilizing disk. A second retaining surface is provided on the outer circumference of the retaining boss. When the first retaining surface and the second retaining surface coincide radially, the interference fit between the first retaining surface and the second retaining surface generates contact friction.

5. The spindle structure for a gear grinding machine according to claim 1, characterized in that: The mandrel has a locating groove in the insertion hole and at the bottom of the slot. The end of the connecting rod has a locating tip. When the locating tip of the connecting rod is inserted into the locating groove of the mandrel, the mandrel and the connecting rod are coaxially positioned.

6. The spindle structure for a gear grinding machine according to claim 1, characterized in that: The connecting rod has a locating shoulder protruding from its periphery. When the connecting rod is inserted into the insertion hole of the mandrel, the locating end face of the locating shoulder seals against the end face of the mandrel. At the same time, a pressure chamber is formed between the outer peripheral wall of the connecting rod and the inner peripheral wall of the insertion hole of the mandrel. The outer peripheral wall of the mandrel has a through hole that connects to the pressure chamber. The connecting sleeve has a first sleeve opening at one end near the mandrel. The sleeve opening fits onto the mandrel, and the outer end of the through hole connects to the inner cavity of the connecting sleeve. The connecting sleeve has a second sleeve opening at one end away from the mandrel. The outer peripheral wall of the locating shoulder has a sealing surface. When the connecting rod is inserted into the insertion hole of the mandrel, the second sleeve opening fits onto the sealing surface of the connecting rod.

7. The spindle structure for a gear grinding machine according to claim 6, characterized in that: The connecting rod has a beveled surface on the sealing surface. The angle formed between the beveled surface and the axis of the mandrel faces the mandrel. The inner surface of the connecting sleeve is covered with a sealing layer. The connecting sleeve has a corner surface on the inner edge of the sleeve opening. When the connecting rod and the mandrel are inserted into the insertion hole and the sleeve opening is fitted onto the sealing surface of the connecting rod, the beveled surface and the corner surface abut against each other.

8. The spindle structure for a gear grinding machine according to claim 3, characterized in that: The mandrel has a clearance groove in the insertion hole and at the top of the alignment groove, which is connected to the alignment groove. The minimum diameter of the clearance groove is greater than the maximum diameter of the locking piece.

9. The spindle structure for a gear grinding machine according to claim 1, characterized in that: The extension arm has a pushing surface on its end face near the stabilizing disk.

10. The spindle structure for a gear grinding machine according to claim 1, characterized in that: The connector is a cylindrical structure with openings at both ends. The connector has an outward-facing interface one and an inward-facing interface two. Interface one is suitable for insertion when the connecting nozzle is aligned. A plug is movably provided on the inner side of interface two. When the connecting nozzle is inserted into interface one and the plug is pushed away from interface two, the connector connects to the inner cavity of the connecting sleeve. When the connecting nozzle is withdrawn from interface one, the plug seals on interface two and automatically disconnects the connection between the connector and the inner cavity of the connecting sleeve. The plug has a spherical structure, and the side of the plug away from interface two elastically abuts against the reset member.

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