Floating drive spindle protection seat

Abstract

The application relates to a floating type transmission main shaft protection seat and relates to the technical field of main shafts. In order to solve the problem that the main shaft encounters sudden radial impact load, the application comprises a connecting seat sleeved outside a main shaft shell, a base plate is arranged below the connecting seat, two sliding sleeves are symmetrically arranged on the base plate, floating rods are arranged in the two sliding sleeves, connecting parts are symmetrically arranged on the two sides of the connecting seat, the two connecting parts correspond to the two floating rods respectively, the connecting parts are formed with U-shaped openings for the floating rods to pass through, elastic elements are arranged in the sliding sleeves, one end of the floating rod is connected with the elastic element, the other end of the floating rod passes through the opening of the connecting part, and locking pieces for locking the floating rods are arranged on the connecting parts. The application realizes protection of the main shaft component, can realize rapid buffering under sudden radial impact, effectively disperses instantaneous impact energy, and expands the radial displacement compensation range.

Description

Technical Field

[0001] This application relates to the field of spindle technology, and in particular to a floating transmission spindle protection seat. Background Technology

[0002] Floating drive spindles, as core components in modern machining, are widely used in high-precision applications such as CNC machine tools, robotic automated machining, precision grinding, and deburring. Their core advantage lies in achieving flexible contact between the spindle and the workpiece or tool through a floating mechanism, thereby compensating for displacement deviations caused by factors such as rigid positioning errors in the mechanical system, thermal deformation, and uneven workpiece surfaces. As the manufacturing industry moves towards intelligent and high-precision manufacturing, the demand for floating drive spindles is increasing, especially in fields with extremely high processing quality requirements such as aerospace and automotive parts, where their performance directly determines product yield and production efficiency.

[0003] In related technologies, when the spindle encounters a sudden radial impact load, such as a tool eccentrically colliding with the workpiece or a sudden surge in radial force caused by tool jamming, it exceeds the radial displacement compensation range of the existing structure. Exceeding the load may damage key components such as spindle bearings and transmission gears, resulting in high maintenance costs and long downtime. Therefore, improvements are needed. Utility Model Content

[0004] To address the problem of sudden radial impact loads on the spindle, this application provides a floating transmission spindle protection seat.

[0005] The floating transmission spindle protection seat provided in this application adopts the following technical solution: A floating transmission spindle protection seat includes a connecting seat sleeved outside the spindle housing. A base plate is provided below the connecting seat. Two sliding sleeves are symmetrically arranged on the base plate. A floating rod is inserted into each of the two sliding sleeves. Connecting portions are symmetrically arranged on both sides of the connecting seat. The two connecting portions correspond to the two floating rods respectively. The connecting portions form U-shaped openings for the floating rods to pass through. An elastic element is provided inside the sliding sleeve. One end of the floating rod is connected to the elastic element, and the other end of the floating rod passes through the opening of the connecting portion. A locking element for locking the floating rod is provided on the connecting portion.

[0006] When the spindle encounters a sudden radial impact load, such as a tool eccentrically colliding with the workpiece or a sudden surge in radial force caused by tool jamming, it exceeds the radial displacement compensation range of the existing structure. Exceeding the load may damage key components such as spindle bearings and transmission gears, resulting in high maintenance costs and long downtime. By adopting the above technical solution, including a connecting seat, which is sleeved outside the spindle housing, two sliding sleeves are mounted on the base plate, and connecting parts are formed on both sides of the connecting seat. A floating rod is slidably installed in the sliding sleeve, and an elastic element is installed in the sliding sleeve. The end of the floating rod away from the sliding sleeve passes through the opening of the connecting part and is fixed by a locking component. When the spindle is running normally, the floating rod is pre-pressed in the sliding sleeve by the elastic element and is in a static equilibrium position. If the tool is eccentrically impacted or jammed, the main bearing will be subjected to instantaneous radial impact force. The impact force is transmitted to the connecting seat through the spindle housing, and then to the two floating rods. The floating rod convex ring compresses the elastic element, and the elastic element provides linear resistance and absorbs part of the impact energy. If the impact force does not exceed the upper limit of the elastic element's bearing capacity, the energy is absorbed by the spring, and the spindle body is not impacted. After the impact force disappears, the elastic element releases the stored elastic potential energy, which pushes the floating rod to move in the opposite direction and achieves reset. By incorporating a connecting seat, sliding sleeve, floating rod, and elastic element, the spindle components are protected. This allows for rapid buffering under sudden radial impacts, effectively dispersing instantaneous impact energy, expanding the radial displacement compensation range, preventing damage to critical components such as spindle bearings and transmission gears due to overload, reducing maintenance costs, shortening downtime, and improving operational reliability.

[0007] Optionally, each of the floating rods is provided with two positioning pins, which are respectively arranged on both sides of the corresponding connecting part, and the floating rod is provided with a through hole for the positioning pins to pass through.

[0008] By adopting the above technical solution, two positioning pins are inserted into the corresponding through holes of the floating rod, and the two positioning pins are located on both sides of the connection. Through the setting of the positioning pins, the positioning pins form a mechanical stop, which effectively prevents the risk of the spindle coming off or falling due to excessive displacement, and enhances the safety of the key components of the spindle under extreme working conditions.

[0009] Optionally, a convex ring is provided at one end of the floating rod near the sliding sleeve, and an annular groove adapted to the convex ring is opened in the inner cavity of the sliding sleeve. The convex ring is slidably connected in the annular groove, and the elastic element acts on the convex ring.

[0010] By adopting the above technical solution, a convex ring is formed on the floating rod, and an annular groove is opened in the inner cavity of the sliding sleeve. Through the setting of the convex ring and the annular groove, the convex ring slides and fits in the annular groove, ensuring the stable axial displacement of the floating rod under the drive of the elastic element. At the same time, the radial limiting effect of the annular groove sidewall on the convex ring prevents the floating rod from coming off under impact load.

[0011] Optionally, one end of the convex ring is provided with a step, one end of the elastic element is sleeved on the step of the convex ring and abuts against the end face of the convex ring, and the other end of the elastic element is connected to the inner bottom wall of the sliding sleeve.

[0012] By adopting the above technical solution, a step is formed at one end of the convex ring, and one end of the elastic element is fitted on the step of the convex ring and abuts against the end face of the convex ring. Through the setting of the step, the step of the convex ring provides positioning for the elastic element, ensuring its tight fit with the end face of the convex ring, so that the elastic element maintains axial center alignment during compression or rebound, and reduces the lateral torsional deformation of the elastic element under impact load.

[0013] Optionally, the base plate is provided with reinforcing ribs, which are arranged between two sliding sleeves. The two ends of the reinforcing ribs are respectively connected to the outer walls of the two sliding sleeves, and stiffening plates are also provided on both sides of the reinforcing ribs.

[0014] By adopting the above technical solution, reinforcing ribs are welded between the two sliding sleeves, and stiffening plates are welded on both sides of the reinforcing ribs. By setting the reinforcing ribs and stiffening plates, the reinforcing ribs are welded between the two sliding sleeves to form a supporting skeleton, which disperses the local stress of the sliding sleeves. At the same time, the welded stiffening plates further increase the stability of the structure and extend the overall service life.

[0015] Optionally, the substrate is a square plate, and strip holes are respectively opened through the four corners of the substrate.

[0016] By adopting the above technical solution, the strip holes are opened at the four corners of the substrate; by setting the strip holes and adjusting the position of the bolts in the strip holes, the strip holes achieve a stable connection between the substrate and the machine tool bed.

[0017] Optionally, the locking component is a locking bolt, which tightens the opening of the connecting part and holds the floating rod tightly to the connecting part.

[0018] By adopting the above technical solution, the locking component is a locking bolt. The locking bolt tightens the opening of the connection part to hold and fix the floating rod to the connection part. Through the setting of the locking component, the clamping force generated by the locking bolt tightening the opening of the connection part causes the opening of the connection part to elastically deform and wrap the floating rod, eliminating the vibration caused by the traditional clearance fit, ensuring the connection strength, and making disassembly and assembly convenient.

[0019] Optionally, the inner wall of the connector is provided with a flexible pad for protecting the spindle housing.

[0020] By adopting the above technical solution, a flexible pad is wrapped around the inner wall of the connector. Through the setting of the flexible pad, the flexible pad covers and protects the spindle housing, avoiding direct contact between the spindle housing and the connector. At the same time, the elastic properties of the pad material can absorb the instantaneous impact energy between the connector and the spindle housing, extending the service life.

[0021] In summary, this application includes at least one of the following beneficial technical effects: 1. By using a connecting seat, sliding sleeve, floating rod, and elastic element, the spindle components are protected. This allows for rapid buffering under sudden radial impacts, effectively dispersing instantaneous impact energy, expanding the radial displacement compensation range, preventing damage to key components such as spindle bearings and transmission gears due to overload, reducing maintenance costs, shortening downtime, and improving operational reliability. 2. By setting the locating pin, the locating pin forms a mechanical stop, effectively preventing the risk of the spindle coming off or falling due to excessive displacement, and enhancing the safety of the key components of the spindle under extreme working conditions; 3. By setting up the convex ring and the ring groove, the convex ring slides in the ring groove to ensure stable axial displacement of the floating rod under the drive of the elastic element. At the same time, the radial limiting effect of the ring groove sidewall on the convex ring prevents the floating rod from coming out under impact load. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a floating transmission spindle protection seat in an embodiment of this application.

[0023] Figure 2 This is a cross-sectional view of a floating transmission spindle protection seat in an embodiment of this application.

[0024] Explanation of reference numerals in the attached drawings: 1. Connecting seat; 11. Connecting part; 2. Base plate; 21. Strip hole; 3. Sliding sleeve; 31. Annular groove; 4. Floating rod; 41. Through hole; 42. Protruding ring; 5. Elastic element; 6. Locking part; 7. Positioning pin; 8. Reinforcing rib; 81. Rib plate; 9. Flexible pad. Detailed Implementation

[0025] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.

[0026] This application discloses a floating transmission spindle protection seat. (Refer to...) Figure 1The floating transmission spindle protection seat includes a connecting seat 1. In this embodiment, the connecting seat 1 is sleeved on the spindle housing, and the connecting seat 1 is fixed to the spindle housing. The inner wall of the connecting seat 1 is covered with a flexible pad 9, which can be made of rubber material. The flexible pad 9 covers and protects the spindle housing, avoiding direct contact between the spindle housing and the connecting seat 1. At the same time, the elastic properties of the pad material can absorb the instantaneous impact energy between the connecting seat 1 and the spindle housing, extending the service life.

[0027] Reference Figure 1 A base plate 2 is installed below the connecting seat 1. In this embodiment, the base plate 2 is a square plate, and a strip hole 21 is opened through each of the four corners of the base plate 2. The position of the bolt in the strip hole 21 is adjusted so that the strip hole 21 can achieve a stable connection between the base plate 2 and the machine tool bed.

[0028] Reference Figure 1 Two sliding sleeves 3 are symmetrically mounted on the base plate 2. A floating rod 4 is inserted inside each of the two sliding sleeves 3. Connecting parts 11 are symmetrically formed on both sides of the connecting seat 1. The two connecting parts 11 correspond to the two floating rods 4 respectively. The connecting parts 11 form a U-shaped opening for the floating rod 4 to pass through. A locking member 6 is installed on the connecting part 11. The locking member 6 is a locking bolt. The locking bolt tightens the opening of the connecting part 11 and holds the floating rod 4 tightly and fixes it on the connecting part 11. The clamping force generated by the locking bolt tightening the opening of the connecting part 11 causes the opening of the connecting part 11 to elastically deform and wrap the floating rod 4, eliminating the vibration caused by the traditional clearance fit, ensuring the connection strength, and making disassembly and assembly convenient.

[0029] Reference Figure 1 Each floating rod 4 is equipped with two positioning pins 7, which are respectively arranged on both sides of the corresponding connecting part 11. The floating rod 4 has through holes 41 for the positioning pins 7 to pass through, and the number of through holes 41 is the same as the number of positioning pins 7. The positioning pins 7 form a mechanical stop, which effectively prevents the risk of the spindle coming off or falling due to excessive displacement, and enhances the safety of the key components of the spindle under extreme working conditions.

[0030] Reference Figure 1 and Figure 2 An elastic element 5 is installed inside the sliding sleeve 3. The elastic element 5 can be a spring with a damper. The floating rod 4 slides inside the sliding sleeve 3. A convex ring 42 is formed at one end of the floating rod 4 near the sliding sleeve 3. An annular groove 31 is opened in the inner cavity of the sliding sleeve 3. The convex ring 42 is slidably connected in the annular groove 31. At the same time, the elastic element 5 acts on the convex ring 42. The convex ring 42 slides in the annular groove 31 to ensure the stable axial displacement of the floating rod 4 under the drive of the elastic element 5. At the same time, the radial limiting effect of the annular groove 31 on the convex ring 42 prevents the floating rod 4 from coming off under impact load.

[0031] Reference Figure 1 and Figure 2 One end of the convex ring 42 is formed with a step. One end of the elastic element 5 is fitted on the step of the convex ring 42 and abuts against the end face of the convex ring 42. The other end of the elastic element 5 is connected to the inner bottom wall of the sliding sleeve 3. The step of the convex ring 42 provides positioning for the elastic element 5, ensuring that it fits tightly with the end face of the convex ring 42, so that the elastic element 5 maintains axial center alignment during compression or rebound, and reduces the lateral torsional deformation of the elastic element 5 under impact load.

[0032] Reference Figure 1 A reinforcing rib 8 is welded and fixed on the base plate 2. The reinforcing rib 8 is located between the two sliding sleeves 3. The two ends of the reinforcing rib 8 are welded to the outer walls of the two sliding sleeves 3 respectively. Ribs 81 are also welded and fixed on both sides of the reinforcing rib 8. The reinforcing rib 8 is welded between the two sliding sleeves 3 to form a supporting frame, which disperses the local stress of the sliding sleeves 3. At the same time, the welded ribs 81 further increase the stability of the structure and extend the overall service life.

[0033] The implementation principle of a floating transmission spindle protection seat in this application embodiment is as follows: When the spindle is running normally, the floating rod 4 is pre-pressed into the sliding sleeve 3 by the elastic element 5 and is in a static equilibrium position. If the tool is eccentrically impacted or jammed, the main bearing is subjected to instantaneous radial impact force. The impact force is transmitted to the connecting seat 1 through the spindle housing, and then to the two floating rods 4. The convex ring 42 of the floating rod 4 compresses the elastic element 5. The elastic element 5 provides linear resistance and absorbs part of the impact energy. The impact force does not exceed the upper limit of the elastic element 5, and the energy is absorbed by the spring. The spindle body is not impacted. After the impact force disappears, the elastic element 5 releases the stored elastic potential energy and pushes the floating rod 4 to move in the opposite direction to achieve reset. By using the connecting seat 1, sliding sleeve 3, floating rod 4 and elastic element 5, the spindle components are protected. This allows for rapid buffering under sudden radial impacts, effectively dispersing instantaneous impact energy, expanding the radial displacement compensation range, preventing damage to key components such as spindle bearings and transmission gears due to overload, reducing maintenance costs, shortening downtime, and improving operational reliability.

[0034] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A floating transmission spindle protection seat, characterized in that: The device includes a connecting seat fitted outside the spindle housing. A base plate is provided below the connecting seat. Two sliding sleeves are symmetrically arranged on the base plate. A floating rod is inserted inside each of the two sliding sleeves. Connecting parts are symmetrically arranged on both sides of the connecting seat. Each connecting part corresponds to one of the two floating rods. The connecting part forms a U-shaped opening for the floating rod to pass through. An elastic element is provided inside the sliding sleeve. One end of the floating rod is connected to the elastic element. The other end of the floating rod passes through the opening of the connecting part. A locking element for locking the floating rod is provided on the connecting part.

2. The floating transmission spindle protection seat according to claim 1, characterized in that: Each of the floating rods is provided with two positioning pins, which are respectively arranged on both sides of the corresponding connecting part, and the floating rod is provided with a through hole for the positioning pins to pass through.

3. The floating transmission spindle protection seat according to claim 1, characterized in that: The floating rod has a convex ring at one end near the sliding sleeve. The inner cavity of the sliding sleeve has an annular groove that matches the convex ring. The convex ring is slidably connected in the annular groove, and the elastic element acts on the convex ring.

4. A floating transmission spindle protection seat according to claim 3, characterized in that: One end of the convex ring is provided with a step, one end of the elastic element is sleeved on the step of the convex ring and abuts against the end face of the convex ring, and the other end of the elastic element is connected to the inner bottom wall of the sliding sleeve.

5. A floating transmission spindle protection seat according to claim 1, characterized in that: The base plate is provided with reinforcing ribs, which are arranged between two sliding sleeves. The two ends of the reinforcing ribs are respectively connected to the outer walls of the two sliding sleeves, and stiffening plates are also provided on both sides of the reinforcing ribs.

6. A floating transmission spindle protection seat according to claim 5, characterized in that: The substrate is a square plate, and strip holes are respectively opened through the four corners of the substrate.

7. A floating transmission spindle protection seat according to claim 1, characterized in that: The locking component is a locking bolt, which tightens the opening of the connecting part and holds the floating rod tightly and fixes it to the connecting part.

8. A floating transmission spindle protection seat according to claim 1, characterized in that: The inner wall of the connector is provided with a flexible pad for protecting the spindle housing.

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