Quick assembly tool for motorized spindle

Abstract

The invention relates to the technical field of motorized spindle assembly, and particularly discloses a motorized spindle rapid assembly tool which comprises a base and further comprises a lifting frame arranged above the base, capable of vertically sliding relative to the base and used for driving a motorized spindle to be lifted upwards; the rotary hollow table is rotationally mounted on the lifting frame, can vertically slide along with the lifting frame and rotate at the same time, and is used for driving the electric main shaft to rotate in the lifting process; the two first sponge boxes are arranged above the rotary hollow table in a bilateral symmetry mode, first arc-shaped sponge rings are arranged in the two first sponge boxes, the interiors of the first arc-shaped sponge rings are soaked with grease, and the two first sponge boxes can be away from each other along with rising of the lifting frame; according to the quick assembly tool for the motorized spindle, the motorized spindle can rotate when being fed into the motorized spindle, the surface of the motorized spindle is coated with a uniform oil film, grease overflowing when the motorized spindle is matched with the mounting base is received and wiped, and the effect is improved while the assembly efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of electric spindle assembly technology, and more specifically to a quick assembly fixture for electric spindles. Background Technology

[0002] In the field of machining equipment assembly and maintenance, the electric spindle, as a core power component, directly determines the operational stability and machining accuracy of the equipment through its assembly precision and efficiency. Currently, the common method for fitting electric spindles to machine tool mounting bases is an intermediate fit.

[0003] Transition fits have extremely high requirements for the lubrication, cleanliness, and coaxiality of the mating surfaces. It is necessary to apply an appropriate amount of special grease to the mating surfaces to reduce assembly friction, prevent rust and corrosion, etc.

[0004] However, in existing assembly processes for electric spindles, the lubrication step requires operators to use a hand-held oil brush or applicator to apply lubricating grease to both the outer circumference of the electric spindle and the mating surfaces of the mounting base. This is done to reduce frictional resistance during assembly and prevent component damage, resulting in low efficiency and poor uniformity. Furthermore, during the vertical insertion of the electric spindle into the machine tool mounting base, it is prone to roughening of the mating surfaces. Because the electric spindle and mounting base have a transitional fit, a closed space is formed between their mating surfaces during assembly. The grease pre-applied to the inner hole of the mounting base is squeezed when the electric spindle is inserted, causing the squeezed grease to overflow along the upper port of the mounting base and drip onto the assembly fixture or other equipment. In summary, the existing electric spindle assembly process is inefficient and has high cleaning and maintenance costs. Summary of the Invention

[0005] This invention provides a quick assembly fixture for electric spindles, which aims to solve the problems of low efficiency and uneven grease application during electric spindle assembly, as well as grease overflow caused by the transition fit between the electric spindle and the mounting base in related technologies.

[0006] The electric spindle quick assembly fixture of the present invention includes: a base, and further includes: a lifting frame, which is disposed above the base and can slide vertically relative to the base to drive the electric spindle to lift upward; The rotating hollow table is rotatably mounted on the lifting frame. It can slide vertically along with the lifting frame and rotate simultaneously to drive the electric spindle to rotate during the lifting process. Two sponge boxes are symmetrically arranged above the rotating hollow platform. Each sponge box contains an arc-shaped sponge ring, which is impregnated with grease. The two sponge boxes can move away from each other as the lifting frame rises. Two rotating plates are symmetrically arranged above a rotating hollow platform. Each rotating plate has a sponge box II on its top. The sponge box II can slide relative to the rotating plate. Inside the sponge box II is an arc-shaped sponge ring II. The two rotating plates can rotate and move closer to each other as the two sponge boxes I move away from each other.

[0007] The above technical solution enables automatic grease application and posture adjustment during the electric spindle assembly process, effectively improving assembly efficiency and quality. When the lifting frame slides the electric spindle upwards, the rotating hollow table rotates synchronously, allowing the electric spindle to complete circumferential rotation during the lifting process. At this time, the two sponge boxes move away from each other with the lifting motion, and the grease-impregnated arc-shaped sponge rings inside can initially and evenly apply grease to the lower outer surface of the electric spindle, while avoiding obstructing the lifting path of the electric spindle. As the sponge boxes continue to move away, the two rotating plates are driven closer together by the linkage structure, causing the top sponge box to slide towards the electric spindle, allowing the arc-shaped sponge rings to tightly adhere to the upper part of the electric spindle and key mating surfaces, thus completing a comprehensive and precise grease coverage in conjunction with the rotation of the electric spindle. The entire process eliminates the need for manual oiling or adjustment of the electric spindle posture, seamlessly integrating pre-treatment oiling with assembly positioning. This significantly reduces the assembly time of a single electric spindle, while ensuring the uniformity and consistency of grease application. It also reduces assembly errors caused by improper manual operation, and significantly improves the automation level and production stability of electric spindle assembly.

[0008] Preferably, connecting rods are fixedly connected to both sides of the lifting frame, driven wheels are fixedly connected to the rotating hollow platform, and a cylinder is also fixedly installed on the lifting frame. The telescopic end of the cylinder is fixedly connected to a push groove, and the tool holder of the electric spindle is placed in the push groove.

[0009] Preferably, a bracket is fixedly connected to the top of the base, and a motor is also fixedly installed on the base. A lead screw is fixedly connected to the drive end of the motor. The lead screw is rotatably mounted on the bracket, and a threaded sleeve is screwed onto the outer surface of the lead screw. The threaded sleeve is fixedly connected to one of the connecting rods, and the threaded sleeve can slide vertically as the lead screw rotates.

[0010] Preferably, a grooved rod is fixedly connected to the bracket, a connecting plate is sleeved on the outer surface of the grooved rod, a drive wheel is rotatably connected to the top of the connecting plate, the drive wheel is screwed to the grooved rod, and belts are mounted on the outside of the drive wheel and the driven wheel.

[0011] Preferably, the top of the rotating hollow platform is rotatably provided with a gear ring, which can rotate relative to the rotating hollow platform. The top of the rotating hollow platform is rotatably connected with several arc-shaped plates, the rotation axis of the arc-shaped plates meshing with the gear ring, and the top of the arc-shaped plates is fixedly connected with a clamping column.

[0012] Through the above technical solution, when the gear ring rotates relative to the rotating hollow table, its meshing relationship with the arc-shaped plate's axis of rotation drives all the arc-shaped plates to rotate synchronously around their own axes, thereby causing the clamping columns at the top of the arc-shaped plates to move synchronously radially. When the electric spindle needs to be clamped, the gear ring drives the clamping columns to converge towards the center, quickly fitting against the outer wall of the electric spindle for stable clamping; after assembly, the gear ring rotates in the opposite direction, and the clamping columns open outward to release the electric spindle. This synchronous clamping structure can adapt to electric spindles of different diameters, eliminating the need for manual adjustment of each clamping component, greatly shortening the clamping and positioning time, while ensuring the coaxiality accuracy of the electric spindle during assembly, reducing assembly deviations caused by improper clamping, and providing a reliable clamping foundation for seamless connection of subsequent pretreatment oiling and assembly positioning stages, further enhancing the automation performance and production stability of the entire tooling.

[0013] Preferably, each of the two sponge boxes is fixedly connected to a horizontal frame on the side near the outside of the device. Spring abutments are fixedly connected to the front and rear sides of the horizontal frame. A guide rod is fixedly connected to the spring abutment and passes through the support frame. A compression spring is provided between the spring abutment and the support, and the compression spring is located outside the guide rod. An inclined rod is fixedly connected to both the screw sleeve and the connecting plate. The inclined rod can be raised with the screw sleeve and force the two horizontal frames to move the two sponge boxes away from each other.

[0014] Through the above technical solution, when the screw sleeve is lifted with the drive component, the inclined rod moves upward synchronously. Its inclined surface applies an outward pushing force to the horizontal frame, forcing the two horizontal frames to move away from each other along the guide rod, overcoming the elastic force of the compression spring. This facilitates the smooth entry of the electric spindle into the tooling's processing area. When the screw sleeve descends and resets, the pushing force of the inclined rod disappears, and the elastic restoring force of the compression spring pushes the spring plate, causing the horizontal frame and the sponge box to move towards each other. This allows the oil-impregnated sponge in the sponge box to tightly adhere to the outer wall of the electric spindle, achieving automatic and uniform oiling pretreatment of the electric spindle. This structure, through the lifting and lowering action of the screw sleeve, links the opening and closing of the sponge box, completing the automatic adaptation of the oiling process without additional drive devices. It ensures the uniformity of oiling for electric spindles of different diameters and seamlessly connects with the action of the clamping mechanism. This effectively reduces manual intervention steps in the assembly process, improves the integration level of the tooling and production efficiency, and avoids the problem of uneven coating thickness caused by manual oiling, providing a good surface pretreatment foundation for the precise assembly of the electric spindle.

[0015] Preferably, an oil valve is provided on the outside of the sponge box, and the oil valve is connected to the inside of the sponge box, so as to replenish the sponge box with oil and maintain the oil-soaked state of the arc-shaped sponge ring.

[0016] Preferably, a rotating rod is fixedly connected to the rotating plate. The rotating rod is rotatably mounted on the bracket and extends to the outside of the bracket. Both ends of the rotating rod are fixedly connected to a rocker arm, and the other end of the rocker arm is fixedly connected to a ring. An arc rod is fixedly connected to the bottom of the horizontal frame, and the ring is sleeved on the outside of the arc rod. The arc rod includes a horizontal parallel section and a downward oblique section.

[0017] Preferably, the top of each of the two rotating plates is fixedly connected to a guide rod and a fixed shell. The sponge box is slidably connected to the guide rod and a spring is provided between it and the fixed shell. One of the fixed shells is provided with a driving component. The driving end of the driving component is provided with a cam. When the cam rotates, it can push the sponge box to slide back and forth along the guide rod.

[0018] Preferably, a guide rail is fixedly connected to the bracket, a guide plate is slidably connected to the guide rail, and a round tube is sleeved on the outside of the rocker arm, with the round tube rotatably connected to the guide plate.

[0019] The beneficial effects of this invention are: 1. This fixture, through its rotation during the feeding of the electric spindle and the coordinated design of the oiling components, enables the electric spindle to form a continuous and uniformly thick oil film on its surface during the ascent process. The entire oiling process requires no manual intervention, and grease can be replenished in real time through the oil valve, eliminating the need for frequent machine stops, saving the manual oiling process, and resulting in better oiling effect and improved efficiency.

[0020] 2. After the electric spindle is fully installed on the mounting base, the anti-overflow component and the wiping component move synchronously to the mating surface between the electric spindle and the bottom of the mounting base due to the positioning of the oiling component. This accurately receives and wipes the grease that is squeezed out, completely eliminating the cleaning work caused by grease overflow and achieving the effect of rapid assembly.

[0021] Third, the electric spindle is rotated and fed into the mounting base. During this process, on the one hand, the uniform grease film can significantly reduce the frictional resistance of the assembly, provide stable lubrication protection for the mating surfaces, and reduce the possibility of scratches. On the other hand, the sponge can remove tiny impurities from the surface of the electric spindle during the fitting and rotation process, preventing impurities from embedding into the mating surfaces with the assembly and reducing the risk of damage to the mating surfaces. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0023] Figure 2 This is a frontal sectional view of the present invention.

[0024] Figure 3 This is a schematic diagram of the lifting frame of the present invention.

[0025] Figure 4 yes Figure 3 The enlarged schematic diagram of part B is shown.

[0026] Figure 5 This is a front sectional view of the lifting frame of the present invention.

[0027] Figure 6 This is a schematic diagram of the rotating component of the present invention.

[0028] Figure 7 This is a schematic diagram of the oiling assembly of the present invention.

[0029] Figure 8 This is a top cross-sectional view of the oiling assembly of the present invention.

[0030] Figure 9 This is a schematic diagram of the oiling component and the closing component of the present invention.

[0031] Figure 10 This is a schematic diagram of the structure of the closing component of the present invention.

[0032] Figure 11 yes Figure 10 The enlarged schematic diagram of section C is shown.

[0033] Figure 12 yes Figure 1 The enlarged schematic diagram of part A is shown.

[0034] Figure label: 10. Base; 11. Bracket; 20. Drive assembly; 201. Motor; 202. Lead screw; 203. Screw sleeve; 30. Lifting frame; 31. Connecting rod; 32. Rotating hollow table; 33. Clamping assembly; 331. Gear ring; 332. Arc plate; 333. Clamping column; 34. Cylinder; 341. Push groove; 40. Rotating assembly; 401. Groove rod; 402. Drive wheel; 403. Connecting plate; 404. Driven wheel; 405. Belt; 50. Oiling assembly; 501. Sponge box one; 5011. Oil valve; 502. Horizontal frame; 503, Spring abutment; 504, Guide rod one; 505, Compression spring; 506, Diagonal rod; 51, Arc-shaped sponge ring one; 60, Closure assembly; 601, Rotating plate; 602, Rotating rod; 603, Rocking rod; 604, Ring; 605, Arc rod; 61, Anti-overflow assembly; 611, Sponge box two; 612, Arc-shaped sponge ring two; 613, Guide rod two; 62, Wiping assembly; 621, Fixing shell; 622, Spring piece; 623, Cam; 63, Support assembly; 631, Round tube; 632, Guide plate; 633, Guide rail. Detailed Implementation

[0035] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0036] like Figures 1 to 12 As shown, the quick assembly fixture for electric spindles of the present invention includes a base 10, a drive assembly 20, a lifting frame 30, a rotating hollow table 32, a rotating assembly 40, an oiling assembly 50, a closing assembly 60, and an anti-overflow assembly 61. The drive assembly 20 and the lifting frame 30 are both located above the base 10. The drive assembly 20 can drive the lifting frame 30 to rise and fall relative to the base 10. The rotating hollow table 32 is rotatably mounted on the lifting frame 30. The electric spindle to be assembled is placed on the rotating hollow table 32. The rotating assembly 40 is located above the base 10 and can drive the rotating hollow table 32 to rotate relative to the lifting frame 30 when the lifting frame 30 rises. This causes the electric spindle to rotate during the lifting process. There are two oiling components 50, which are symmetrically arranged above the lifting frame 30. When the lifting frame 30 is raised or lowered, it can drive the two oiling components 50 to move closer or further away from each other. When the two oiling components 50 move closer to each other, they can apply grease to the outer surface of the electric spindle. There are two closing components 60, which are symmetrically arranged above the two oiling components 50. An anti-overflow component 61 is arranged on the closing components 60. The two closing components 60 can open or close when the two oiling components 50 move closer or further away. The anti-overflow component 61 can prevent grease from overflowing and dripping onto the assembly fixture.

[0037] like Figure 1 as well as Figure 2 As shown, a bracket 11 is fixedly connected to the top of the base 10. The drive component 20 and the rotation component 40 are respectively arranged on both sides of the bracket 11. The oiling component 50 is slidably mounted on the bracket 11, and the closing component 60 is rotatably mounted on the bracket 11. The bracket 11 can realize the functional connection between components and the limitation of the motion trajectory, while ensuring the stability of the tooling structure and improving the assembly consistency of the electric spindle.

[0038] like Figure 2 As shown, the drive assembly 20 includes a motor 201, a lead screw 202, and a screw sleeve 203. The motor 201 is fixedly mounted on the base 10. The lead screw 202 is vertically rotatably connected to the bracket 11 and is fixedly connected to the drive end of the motor 201. The screw sleeve 203 is threadedly connected to the outside of the lead screw 202. When the motor 201 starts, it drives the lead screw 202 to rotate. The screw sleeve 203 can slide vertically relative to the bracket 11 along the lead screw 202 through the screw connection.

[0039] like Figures 2 to 5 As shown, connecting rods 31 are fixedly connected to both sides of the lifting frame 30, and one of the connecting rods 31 is fixedly connected to the threaded sleeve 203, so that the lifting frame 30 can slide vertically with the threaded sleeve 203, thereby driving the rotating hollow table 32 rotatably set on the lifting frame 30 to slide vertically, and finally driving the electric spindle to slide vertically into the machine tool mounting base.

[0040] A clamping assembly 33 is provided on the top of the rotating hollow table 32. The clamping assembly 33 includes a gear ring 331, an arc plate 332, and clamping columns 333. The gear ring 331 is rotatably mounted on the top of the rotating hollow table 32. Multiple arc plates 332 are provided and are rotatably mounted on the top of the rotating hollow table 32. The rotation axis of the arc plate 332 meshes with the inner ring of the gear ring 331. The clamping columns 333 are fixedly connected to the top of the arc plate 332. A driving component (not shown) is provided inside the rotating hollow table 32, which can drive the gear ring 331 to rotate, thereby driving multiple arc plates 332 to rotate so that multiple clamping columns 333 rotate around the rotation axis of the arc plate 332 and gather or disperse towards the center of the rotating hollow table 32. When gathered, they can achieve fixed clamping of the electric spindle.

[0041] A cylinder 34 is fixedly installed on the lifting frame 30, and the telescopic end of the cylinder 34 is fixedly connected to a push groove 341. The tool holder of the electric spindle is placed in the push groove 341. After the cylinder 34 is started, it can drive the push groove 341 to lift relative to the lifting frame 30, thereby pushing the electric spindle to lift.

[0042] like Figure 2 , Figure 3 , Figure 5 as well as Figure 6 As shown, the rotating assembly 40 includes a grooved rod 401, a drive wheel 402, a connecting plate 403, a driven wheel 404, and a belt 405. The grooved rod 401 is fixedly mounted on the bracket 11. The drive wheel 402 is screwed onto the grooved rod 401. The connecting plate 403 is slidably connected to the outer circumferential surface of the grooved rod 401, and the drive wheel 402 is rotatably mounted on the top of the connecting plate 403. The connecting plate 403 is fixedly connected to the connecting rod 31 on the other side of the connecting rod 31. The driven wheel 404 is fixedly connected to the bottom of the rotating hollow platform 32. The belt 405 is mounted on the outside of the drive wheel 402 and the driven wheel 404 to transmit power. When the lifting frame 30 drives the rotating hollow platform 32 to rise, the connecting plate 403 and the drive wheel 402 are lifted through the connecting rod 31. The drive wheel 402 will rotate due to the screw connection, and the driven wheel 404 and the rotating hollow platform 32 will rotate through the belt 405, so that the rotating platform and the electric spindle can rotate during the lifting process.

[0043] like Figure 2 as well as Figures 7 to 9As shown, the oiling assembly 50 includes a sponge box 501, a horizontal frame 502, a spring abutment 503, a guide rod 504, a compression spring 505, and a diagonal rod 506. The sponge box 501 is located inside the bracket 11. The horizontal frame 502 is fixedly connected to the sponge box 501 and slidably connected to the bracket 11. Two spring abutments 503 are provided and located on the front and rear sides of the horizontal frame 502. The guide rod 504 is fixedly connected to the side of the spring abutment 503 away from the sponge box 501 and passes through the frame of the bracket 11. The compression spring 505 is provided between the spring abutment 503 and the bracket 11 and is wound around the outside of the guide rod 504. The diagonal rod 506 of one oiling assembly 50 is fixedly connected to the threaded sleeve 203, and the diagonal rod 506 of the other oiling assembly 50 is fixedly connected to the connecting... On plate 403, without external force, the elastic potential energy of spring 505 pushes two sponge boxes 501 closer together and they are interlocked. Each sponge box 501 has an arc-shaped sponge ring 51 inside, and an oil valve 5011 for grease to pass through is provided on the outside of the sponge box 501. Through the adsorption capacity of the sponge itself, the arc-shaped sponge ring 51 can always be uniformly wetted with grease. When the electric spindle rotates and lifts, the outside of the electric spindle can fully contact the two arc-shaped sponge rings 51. At this time, the grease adsorbed inside the arc-shaped sponge ring 51 will be evenly transferred to the outer surface of the electric spindle under the action of friction, forming a continuous and uniformly thick grease protective film. This protective film can effectively reduce the frictional resistance between the electric spindle and the machine tool mounting seat during assembly, and at the same time play a role in rust prevention and sealing pretreatment.

[0044] It should be noted that during the contact process, the compression spring 505 of the oiling assembly 50 always applies an elastic force toward the electric spindle to the sponge box 501, so that the arc-shaped sponge ring 51 can fit tightly against the outer surface of the electric spindle. Even if there is a slight deviation in the outer diameter of the electric spindle, the elastic compensation effect of the compression spring 505 can ensure that there are no dead corners in the oiling and avoid local missed coating. In addition, the oil valve 5011 on the outside of the sponge box 501 can adjust the grease supply rate according to the assembly requirements. When the grease content in the arc-shaped sponge ring 51 is insufficient, the oil valve 5011 can be opened to replenish the grease inside the sponge box 501. The grease will penetrate to the surface of the arc-shaped sponge ring 51 through the pores of the sponge, maintaining the continuity of the oiling process without frequent machine stops to add grease, further improving assembly efficiency.

[0045] During the process of feeding the electric spindle into the machine tool mounting base, when the threaded sleeve 203 and the connecting plate 403 are simultaneously raised to a certain height, the lifting of the inclined rod 506 forces the horizontal frame 502 to slide outwards from the device, thereby causing the sponge boxes 501 of the two oiling components 50 to move away from each other. This provides sufficient space for the electric spindle to subsequently and accurately enter the machine tool mounting base, avoiding interference between the oiling components 50 and the lifting frame 30. In this process, the movement of the oiling components 50 and the lifting trajectory of the electric spindle are coordinated. The sponge box 501 slides outward from the device, and the arc-shaped sponge ring 51 inside it gradually separates from the outer surface of the electric spindle. At this time, the upper part of the outer surface of the electric spindle is evenly covered with a layer of grease. Then, the clamping assembly 33 is opened, and the push groove 341 is moved upward by the cylinder 34. The push groove 341 pushes the electric spindle tool holder vertically upward, providing additional feed thrust to the electric spindle, so that the electric spindle is separated from the rotary table. Then, the motor 201 is started again so that the electric spindle is fully assembled into the mounting base.

[0046] like Figure 2 as well as Figures 9 to 12 As shown, the closing assembly 60 includes a rotating plate 601, a rotating rod 602, a rocker arm 603, a ring 604, and an arc rod 605. The rotating plates 601 of the two closing assemblies 60 are located on the front and rear sides of the oiling assembly 50, respectively. The rotating rod 602 is fixedly connected to the rotating plate 601 and rotatably mounted on the bracket 11. The rocker arm 603 is fixedly connected to both ends of the rotating rod 602, and the other end of the rocker arm 603 is fixedly connected to the ring 604. The arc rod 605 is fixedly connected to the bottom of the horizontal frame 502, and the ring 604 is fitted onto the arc rod 605. After the push groove 341 completes the push, it continues to drive the lifting frame 30 to rise, causing the two horizontal frames 502 to move away again, and causing the arc rod 605 to... Laterally, the ring 604 slides on the arc rod 605. The arc rod 605 has a two-section structure. The first section is a horizontal parallel section, which allows the rocker arm 603 to remain stationary when the two horizontal frames 502 slide. The second section is a downward sloping section, which allows the rocker arm 603 to rotate around the rotating rod 602 after the push-up groove 341 completes the push. This causes the rotating rod 602 and the rotating plate 601 to rotate. The rotating plates 601 of the two closed components 60 simultaneously approach the electric spindle. The anti-overflow component 61 on the rotating plate 601 contacts the mating position between the electric spindle and the machine tool mounting base. After the two rotating plates 601 are closed, there is a slot to avoid rigid contact with the electric spindle tool holder.

[0047] The spill prevention component 61 includes a second sponge box 611, a second arc-shaped sponge ring 612, and a second guide rod 613. The second sponge box 611 is slidably mounted on the top of the rotating plate 601, the second arc-shaped sponge ring 612 is disposed inside the second sponge box 611, and the second guide rod 613 is fixedly connected to the top of the rotating plate 601. The second sponge box 611 can slide along the second guide rod 613.

[0048] Each of the two rotating plates 601 is provided with a wiping assembly 62. The wiping assembly 62 includes a fixed shell 621 and a spring piece 622. The fixed shell 621 is fixedly connected to the rotating plate 601, and the spring piece 622 is disposed between the sponge box 611 and the fixed shell 621. One of the two wiping assemblies 62 also includes a driving component and a cam 623. The driving component is disposed inside the fixed shell 621, and the cam 623 is fixedly connected to the driving end of the driving component. The driving component can drive the cam 623 to rotate.

[0049] Under the action of the spring 622, the second sponge box 611 extends a certain distance beyond the rotating plate 601. When the two rotating plates 601 are closed, the two sponge boxes 611 come into contact, the spring 622 is compressed, and the second arc-shaped sponge ring 612 contacts the mating position between the electric spindle and the machine tool mounting base, catching the grease discharged due to the transition fit between the electric spindle and the mounting base. Then, the drive unit drives the cam 623 to rotate, forcing the second sponge box 611 and the second arc-shaped sponge ring 612 to slide along the second guide rod 613, reciprocating at the mating position between the electric spindle and the mounting base, wiping and absorbing the discharged grease. The second sponge box 611 can also be equipped with an oil valve 5011 to discharge the grease that has settled at the bottom of the second arc-shaped sponge ring 612.

[0050] The rocker arm 603 is externally provided with a support assembly 63, which includes a round tube 631, a guide plate 632, and a guide rail 633. The round tube 631 is sleeved on the outside of the rocker arm 603 and is rotatably connected to the guide plate 632. The guide plate 632 is slidably connected to the guide rail 633, and the guide rail 633 is fixedly connected to the bracket 11. When the rocker arm 603 rotates, the angle of the round tube 631 changes, which drives the guide plate 632 to slide on the guide rail 633, ensuring that the rocker arm 603 always rotates along the preset path and ensuring the coordinated action of the closing assembly 60 and the oiling assembly 50.

[0051] It should be noted that the electric spindle first rotates into the mounting base. During this process, grease has been applied to the outer surface of the electric spindle. When the electric spindle contacts the mating surface of the mounting base, the grease cannot flow downwards due to the transition fit between the electric spindle and the mounting base. However, the upward movement and rotation of the electric spindle will push the grease to move upwards continuously, ensuring that the grease at the very front of the electric spindle will not run out. Furthermore, when the rear section of the electric spindle enters the mounting base, the mating surface of the mounting base has already been evenly coated with grease by the front section of the electric spindle. This will prevent the problem of localized oil shortage or lubrication interruption on the mating surface during the later assembly, further ensuring the smoothness of the entire assembly process and the protection effect of the mating surface.

[0052] Working principle: The electric spindle to be assembled is placed on the rotating hollow table 32 on the top of the lifting frame 30, ensuring that the electric spindle tool holder is inserted into the push groove 341 of the cylinder 34 on the lifting frame 30 with the tool holder facing downwards. After the initial position calibration is completed, the drive component inside the rotating hollow table 32 is activated to drive the gear ring 331 to rotate. The gear ring 331 drives multiple arc plates 332 to rotate synchronously around their own axis, so that the clamping column 333 on the top of the arc plate 332 gathers towards the center of the rotating hollow table 32 until it is tightly attached to the outer circumference of the electric spindle, thereby achieving stable clamping of the electric spindle and preventing deviation during subsequent movements. The motor 201 is started, which drives the lead screw 202 to rotate. The rotation of the lead screw 202 will be converted into the vertical sliding of the screw sleeve 203 along the lead screw 202. The lifting frame 30 is fixed to the screw sleeve 203 through the connecting rod 31 on one side, so it is lifted upward synchronously with the screw sleeve 203, which in turn drives the rotating hollow table 32 and the clamped electric spindle to rise synchronously. When the lifting frame 30 rises, it will drive the connecting plate 403 to move upward synchronously along the outer circumference of the grooved rod 401. The upward movement of the connecting plate 403 will force the drive wheel 402 to rotate around the grooved rod 401. The rotation of the drive wheel 402 drives the driven wheel 404 and the rotating hollow table 32 to rotate through the belt 405, which ultimately makes the electric spindle rotate synchronously during the rising process, in preparation for subsequent uniform oiling. In the initial state, the compression spring 505 is in a naturally extended state, pushing the two sponge boxes 501 on the support 11 to slide closer and engage with each other. The arc-shaped sponge ring 51 inside the sponge box 501 pre-absorbs grease, and the elastic force of the compression spring 505 allows the arc-shaped sponge ring 51 to tightly adhere to the outer circumference of the electric spindle. As the electric spindle rises and rotates, its outer surface continuously rubs against the arc-shaped sponge ring 51. The grease absorbed inside the arc-shaped sponge ring 51 is evenly transferred to the outer surface of the electric spindle, forming a continuous grease protective film of uniform thickness. The sponge ring 51 can clean the outer surface of the electric spindle at the same time. If the grease in the arc-shaped sponge ring 51 is insufficient, grease can be added to the sponge box 501 through the oil valve 5011 without stopping the machine, ensuring continuous oiling. When the screw sleeve 203 and the connecting plate 403 are raised to the preset height, the two inclined rods 506 rise with the screw sleeve 203 and the connecting plate 403 respectively, forcing the cross frame 502 to drive the sponge box 501 to slide to the outside of the device. The two sponge boxes 501 move away from each other, leaving space for the electric spindle to enter the machine tool mounting base and avoiding component interference. The drive unit inside the rotating hollow table 32 is activated, driving the gear ring 331 to rotate in the opposite direction, causing the arc plate 332 and the clamping column 333 to disperse away from the electric spindle, releasing the clamping and fixing of the electric spindle. Then, the cylinder 34 on the lifting frame 30 is activated. The telescopic end of the cylinder 34 drives the push groove 341 to move vertically upward. The push groove 341 applies axial thrust to the electric spindle tool holder, assisting the electric spindle to disengage from the rotating hollow table 32. Then, the motor 201 of the drive assembly 20 is activated again. The motor 201 drives the lead screw 202 to continue rotating, causing the screw sleeve 203 to drive the lifting frame 30 and the electric spindle to rise further until the electric spindle is fully embedded in the preset assembly position of the machine tool mounting seat. When the oiling assembly 50 slides outward, the arc rod 605 at the bottom of the horizontal frame 502 moves laterally synchronously with the horizontal frame 502. The first segment of the arc rod 605 is a horizontal parallel segment. In this stage (i.e., before the push groove 341 moves), it only drives the ring 604 to move horizontally, and the rocker arm 603 does not rotate temporarily. When the screw sleeve 203 and the connecting plate 403 continue to rise, and the electric spindle tool holder approaches the machine tool mounting base, the arc rod 605 enters the second segment of downward oblique movement. At this time (after the push groove 341 moves), the arc rod 605 applies an oblique thrust to the rocker arm 603 through the ring 604, forcing the rocker arm 603 to move away from the ring 604 around the rotating rod 602. When one end of 4 rotates, the rotating rod 602 synchronously drives the rotating plate 601 to rotate in the direction of the electric spindle. The two rotating plates 601 move closer and close synchronously. After closing, a slot is reserved to match the tool holder of the electric spindle to avoid rigid collision with the tool holder. During this process, when the rocker arm 603 rotates, the round tube 631 sleeved on its outside rotates synchronously with the angle change of the rocker arm 603. The round tube 631 drives the guide plate 632 to slide stably along the guide rail 633 to ensure that the rocker arm 603 always rotates along the preset path, to avoid the closing component 60 from jamming due to force deviation, and to ensure the coordination between the closing action and the lifting trajectory of the electric spindle. During the closing process of the rotating plate 601, the second sponge box 611 extends from the top of the rotating plate 601 by a preset length under the elastic force of the naturally extended spring 622. When the two rotating plates 601 are completely closed, the two sponge boxes 611 come into contact with each other and are squeezed. The spring 622 is compressed, and the arc-shaped sponge ring 612 inside the second sponge box 611 fits tightly against the gap between the electric spindle and the machine tool mounting base. This fit can accurately receive the excess grease discharged during the transition fit between the electric spindle and the machine tool mounting base, preventing grease from dripping and contaminating the tooling base 10 or other components. If the amount of grease discharged during the assembly process is large, the accumulated grease in the arc-shaped sponge ring 612 can be discharged in real time through the oil valve 5011 outside the second sponge box 611, avoiding grease overflowing from the second sponge box 611 and maintaining the continuity of the anti-overflow effect. After the anti-overflow component 61 has finished receiving the grease, the drive of the wiping component 62 is activated. The drive drives the cam 623 to rotate around its own axis. During the rotation of the cam 623, its protruding part periodically pushes the sponge box 611, forcing the sponge box 611 to slide back and forth along the guide rod 613. This causes the arc-shaped sponge ring 612 to wipe back and forth at the gap between the electric spindle and the machine tool mounting base. Through the wiping action, the arc-shaped sponge ring 612 can fully absorb the excess grease remaining on the mating surface, ensuring the fitting accuracy between the electric spindle and the machine tool mounting base, while avoiding grease residue from affecting the stability of subsequent assembly. After wiping, lower the height of the lifting frame 30 while maintaining the height of the push groove 341. Unfold the two rotating plates 601. Then, tighten the connecting bolts between the electric spindle and the mounting base with a torque wrench. Finally, use a dial indicator to test the assembly accuracy of the electric spindle.

[0053] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A quick assembly fixture for an electric spindle, comprising: The base (10) is characterized in that it further includes: a lifting frame (30) disposed above the base (10) and capable of vertically sliding relative to the base (10) for driving the electric spindle to lift upward; The rotating hollow table (32) is rotatably mounted on the lifting frame (30), and can slide vertically along with the lifting frame (30) and rotate at the same time, so as to drive the electric spindle to rotate during the lifting process; Two sponge boxes (501) are symmetrically arranged above the rotating hollow platform (32). Each of the two sponge boxes (501) has an arc-shaped sponge ring (51) inside. The arc-shaped sponge ring (51) is soaked in grease. The two sponge boxes (501) can move away from each other as the lifting frame (30) rises. Two rotating plates (601) are symmetrically arranged above the rotating hollow platform (32). Each of the two rotating plates (601) has a sponge box 2 (611) on its top. The sponge box 2 (611) can slide relative to the rotating plate (601). The sponge box 2 (611) has an arc-shaped sponge ring 2 (612) inside. The two rotating plates (601) can rotate and move closer to each other as the two sponge boxes 1 (501) move away from each other.

2. The electric spindle quick assembly fixture according to claim 1, characterized in that, The lifting frame (30) is fixedly connected to both sides with connecting rods (31), and a driven wheel (404) is fixedly connected to the rotating hollow table (32). A cylinder (34) is also fixedly installed on the lifting frame (30). A push groove (341) is fixedly connected to the telescopic end of the cylinder (34), and the tool holder of the electric spindle is placed in the push groove (341).

3. The electric spindle quick assembly fixture according to claim 2, characterized in that, The top of the base (10) is fixedly connected to a bracket (11), and a motor (201) is also fixedly installed on the base (10). The drive end of the motor (201) is fixedly connected to a lead screw (202). The lead screw (202) is rotatably mounted on the bracket (11), and a screw sleeve (203) is screwed onto the outer surface of the lead screw (202). The screw sleeve (203) is fixedly connected to one of the connecting rods (31), and the screw sleeve (203) can slide vertically as the lead screw (202) rotates.

4. The electric spindle quick assembly fixture according to claim 3, characterized in that, A grooved rod (401) is fixedly connected to the bracket (11). A connecting plate (403) is sleeved on the outer surface of the grooved rod (401). A drive wheel (402) is rotatably connected to the top of the connecting plate (403). The drive wheel (402) is screwed to the grooved rod (401), and belts (405) are mounted on the outside of the drive wheel (402) and the driven wheel (404).

5. The electric spindle quick assembly fixture according to claim 1, characterized in that, The top of the rotating hollow platform (32) is rotatably provided with a gear ring (331), which can rotate relative to the rotating hollow platform (32). The top of the rotating hollow platform (32) is rotatably connected with several arc-shaped plates (332), the rotation axis of the arc-shaped plates (332) meshes with the gear ring (331), and the top of the arc-shaped plates (332) is fixedly connected with a clamping column (333).

6. The electric spindle quick assembly fixture according to claim 4, characterized in that, Two of the sponge boxes (501) are fixedly connected to a horizontal frame (502) on the side near the outside of the device. Spring abutments (503) are fixedly connected to the front and rear sides of the horizontal frame (502). A guide rod (504) penetrating the frame of the bracket (11) is fixedly connected to the spring abutment (503). A compression spring (505) is provided between the spring abutment (503) and the bracket (11). The compression spring (505) is located outside the guide rod (504). An inclined rod (506) is fixedly connected to both the screw sleeve (203) and the connecting plate (403). The inclined rod (506) can be raised with the screw sleeve (203) and force the two horizontal frames (502) to move the two sponge boxes (501) away from each other.

7. The electric spindle quick assembly fixture according to claim 1, characterized in that, An oil valve (5011) is provided on the outside of the first sponge box (501). The oil valve (5011) is connected to the inside of the first sponge box (501) and can replenish oil into the first sponge box (501) through the oil valve (5011) to maintain the oil-soaked state of the first arc sponge ring (51).

8. The electric spindle quick assembly fixture according to claim 3, characterized in that, A rotating rod (602) is fixedly connected to the rotating plate (601). The rotating rod (602) is rotatably mounted on the bracket (11) and extends to the outside of the bracket (11). Both ends of the rotating rod (602) are fixedly connected to a rocker arm (603), and the other end of the rocker arm (603) is fixedly connected to a ring (604). An arc rod (605) is fixedly connected to the bottom of the horizontal frame (502), and the ring (604) is sleeved on the outside of the arc rod (605). The arc rod (605) includes a horizontal parallel section and a downward oblique section.

9. The electric spindle quick assembly fixture according to claim 1, characterized in that, The tops of the two rotating plates (601) are fixedly connected to the second guide rod (613) and the fixed shell (621). The second sponge box (611) is slidably connected to the second guide rod (613) and a spring piece (622) is provided between it and the fixed shell (621). One of the fixed shells (621) is provided with a driving component. The driving end of the driving component is provided with a cam (623). When the cam (623) rotates, it can push the second sponge box (611) to slide back and forth along the second guide rod (613).

10. The electric spindle quick assembly fixture according to claim 3, characterized in that, The bracket (11) is fixedly connected to a guide rail (633), and a guide plate (632) is slidably connected to the guide rail (633). A round tube (631) is sleeved on the outside of the rocker arm (603), and the round tube (631) is rotatably connected to the guide plate (632).

Images