Lifting mechanism for hollow shaft machining equipment

Abstract

The invention relates to the technical field of shaft machining, in particular to a lifting mechanism for hollow shaft machining equipment, which comprises a base, a platform is arranged at the top of the base, a fixed chuck is arranged at the top of the platform, a cavity is formed in the bottom of the base, a lifting mechanism is arranged in the cavity, and the lifting mechanism is connected with the bottom of the platform; the lifting mechanism comprises a plurality of threaded sleeves fixed to the top of the base, threaded columns are in threaded connection with the interiors of the threaded sleeves, one ends of the tops of the threaded columns are installed at the bottom of the platform through bearings, and a driving assembly is arranged in the cavity and connected with the threaded sleeves. According to the equipment, after the platform at the top is driven by the threaded columns to move together, the difficulty of lifting adjustment of the platform relative to the base is low, and therefore the machining height of the hollow shaft can be adjusted conveniently.

Description

Technical Field

[0001] This invention relates to the field of shaft machining technology, and in particular to a lifting mechanism for hollow shaft machining equipment. Background Technology

[0002] The hollow shaft has a stepped cylinder machined on its outer surface and an external keyway. The central through hole of the hollow shaft is connected to the main shaft of the pressing chamber. Power is output through the shaft and directly transmitted to the main shaft of the pressing chamber. During the machining of the hollow shaft, the position of the hollow shaft needs to be adjusted. The lifting structure is used to lift the hollow shaft and adjust its position.

[0003] Hollow shaft processing equipment on the market mainly consists of a lifting mechanism and a fixing mechanism. The lifting mechanism includes a hydraulic pump and a hydraulic cylinder. A platform is fixed to the top of the piston rod of the hydraulic cylinder, and a fixing mechanism is set on the top of the platform. The hollow shaft is fixed by the fixing mechanism. The hydraulic pump injects or discharges liquid into the hydraulic cylinder, which drives the piston rod to move up and down, thereby realizing the lifting and lowering of the processing equipment. Using a hydraulic pump and hydraulic cylinder as the transmission mechanism to lift and lower the equipment makes the machine heavy and cumbersome. When processing hollow shafts, some parts require precise machining, and using a hydraulic pump and hydraulic cylinder as the power output makes it difficult to control the lifting distance, resulting in increased machining errors. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies in hollow shaft processing, where some parts require precise machining and the use of hydraulic pumps and cylinders as power outputs makes it difficult to control the lifting distance. Therefore, this invention proposes a lifting mechanism for hollow shaft processing equipment.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: Design a lifting mechanism for a hollow shaft processing equipment, including a base, a platform on the top of the base, a fixed chuck on the top of the platform, a cavity at the bottom of the base, a lifting mechanism inside the cavity, and the lifting mechanism being connected to the bottom of the platform; The lifting mechanism includes several threaded sleeves fixed to the top of the base, each of the threaded sleeves having a threaded post threadedly connected inside, and one end of each of the threaded posts being mounted on the bottom of the platform via a bearing. A drive assembly is provided inside the cavity, and the drive assembly is connected to the several threaded sleeves.

[0006] Preferably, the driving mechanism includes a motor fixed at the bottom of the cavity, a transmission mechanism is provided inside the cavity and connected to the motor, a plurality of threaded sleeves are mounted with bevel gear rings at their bottoms via bearings, the plurality of bevel gear rings are connected to the transmission mechanism, a long groove is provided on one side of the plurality of threaded columns, and a locking block is provided inside the plurality of bevel gear rings, one end of which is slidably disposed in the long groove.

[0007] Preferably, both the card block and the working surface of the long slot are provided with a wear-resistant coating.

[0008] Preferably, the transmission mechanism includes several fixed blocks fixed to the bottom of the base, each of the fixed blocks having a first rotating shaft mounted on it via bearings, each of the first rotating shafts having a first bevel gear mounted on one end, the first bevel gear meshing with a bevel gear ring, and the output shaft of the motor having a connecting mechanism with the other end of the rotating shafts.

[0009] Preferably, the connecting mechanism includes a fixing plate fixed to the bottom of several fixing blocks. A second rotating shaft is provided on the fixing plate via a bearing. One end of the second rotating shaft is connected to the output shaft of the motor. A second bevel gear is provided on the outer side of the other end of the second rotating shaft. A third bevel gear is installed on one end of each of the several first rotating shafts. The second bevel gear meshes with the several third bevel gears.

[0010] Preferably, several of the third bevel gears are arranged symmetrically around the second bevel gear.

[0011] Preferably, a nitriding hardening layer is provided on the working surfaces of the bevel gear ring sleeve, the first bevel gear, the second bevel gear, and the third bevel gear.

[0012] Preferably, a telescopic platform is provided on the outer side of the base, and the outer side of the telescopic platform is connected to the bottom edge of the platform.

[0013] Preferably, each of the jaws of the fixed chuck is connected to a clamping block, the inner side of which is arc-shaped and has anti-slip texture.

[0014] The lifting mechanism for hollow shaft processing equipment proposed in this invention has the following advantages: 1. After the platform is moved together by several threaded columns, it is easier to adjust the height of the platform relative to the base, which makes it easier to adjust the machining height of the hollow shaft. Moreover, during the machining process, the force on the hollow shaft held on the fixed chuck is transmitted to the platform through the fixed chuck, and then to the threaded sleeve through several threaded columns. The threaded sleeve then transmits the force to the base, which reduces the chance of vibration during the machining of the hollow shaft and thus reduces the machining error of the hollow shaft. 2. The motor drives the second rotating shaft, which in turn drives several bevel gear rings to rotate through a bevel gear transmission system. This makes the arrangement of electrical components of the equipment more reasonable, reduces the difficulty of adjusting the platform with a fixed chuck, and makes the processing of hollow shafts simpler. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a lifting mechanism for a hollow shaft processing equipment proposed in this invention.

[0016] Figure 2 This is a schematic cross-sectional view of a lifting mechanism for a hollow shaft machining equipment proposed in this invention. Figure 1 .

[0017] Figure 3 for Figure 2 A magnified view of point A.

[0018] Figure 4 This is a schematic cross-sectional view of a lifting mechanism for a hollow shaft machining equipment proposed in this invention. Figure 2 .

[0019] Figure 5 for Figure 4 A magnified view of a section at point B.

[0020] Figure 6 This is an exploded enlarged structural diagram of a lifting mechanism for a hollow shaft processing equipment proposed in this invention.

[0021] In the diagram: 1. Base; 2. Platform; 3. Fixed chuck; 4. Cavity; 5. Threaded sleeve; 6. Threaded post; 7. Motor; 8. Bevel gear ring sleeve; 9. Long groove; 10. Clamping block; 11. Fixing block; 12. First rotating shaft; 13. First bevel gear; 14. Fixing plate; 15. Second rotating shaft; 16. Second bevel gear; 17. Third bevel gear; 18. Telescopic table; 19. Clamping block. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0023] Example 1: Refer to Figure 1-6 A lifting mechanism for a hollow shaft processing equipment includes a base 1, a platform 2 on the top of the base 1, a fixed chuck 3 on the top of the platform 2, a cavity 4 at the bottom of the base 1, a lifting mechanism inside the cavity 4, and the lifting mechanism being connected to the bottom of the platform 2. The lifting mechanism includes several threaded sleeves 5 fixed to the top of the base 1, each of the several threaded sleeves 5 being threadedly connected to a threaded post 6, and the top end of each of the several threaded posts 6 being mounted on the bottom of the platform 2 via a bearing. A drive assembly is provided in the cavity 4, and the drive assembly is connected to the several threaded sleeves 5. The drive mechanism includes a motor 7 fixed at the bottom of the cavity 4. The motor 7 is a servo motor. A transmission mechanism is provided inside the cavity 4 and is connected to the motor 7. A plurality of threaded sleeves 5 are mounted with bevel gear ring sleeves 8 through bearings at their bottoms. One end of the threaded post 6 passes through the corresponding bevel gear ring sleeve 8. The plurality of bevel gear ring sleeves 8 are connected to the transmission mechanism. A long groove 9 is opened on one side of the plurality of threaded posts 6. A locking block 10 is provided inside the plurality of bevel gear ring sleeves 8, and one end of the locking block 10 is slidably disposed in the long groove 9.

[0024] Operating Procedure: When the height of platform 2 needs to be adjusted, start motor 7. Motor 7 drives bevel gear ring sleeve 12 to rotate through transmission mechanism. During the rotation of several bevel gear ring sleeves 12, the threaded column 6 is rotated through the locking block 10. As the threaded column 6 rotates on the threaded sleeve 5, the locking block 10 slides relative to the long groove 9, allowing the threaded column 6 to slide on the bevel gear ring sleeve 12. This allows several threaded columns 6 to move together with the top platform 2, making it easier to raise and lower platform 2 relative to base 1. This facilitates the adjustment of the hollow shaft machining height. Moreover, during the machining process, the force on the hollow shaft held on the fixed chuck 3 is transmitted to platform 2 through the fixed chuck 3. Platform 2 transmits this force to the threaded sleeve 5 through several threaded columns 6, and then to base 1, forming a rigid closed-loop support. This reduces the probability of vibration during hollow shaft machining, resulting in smaller machining errors.

[0025] Example 2: In Example 1, the rotation of several threaded posts 6 requires a motor 7, resulting in multiple motors 7. Controlling the synchronous rotation of the corresponding threaded posts 6 with multiple motors 7 requires multiple PLCs and other electrical components, making the electrical layout of the equipment cumbersome. An optimization is made based on Example 1, referencing... Figure 1-6 The transmission mechanism includes several fixed blocks 11 fixed to the bottom of the base 1. Each of the fixed blocks 11 is equipped with a first rotating shaft 12 via bearings. Each of the first rotating shafts 12 is fixedly equipped with a first bevel gear 13 at one end. The first bevel gear 13 meshes with the bevel gear ring 8. The output shaft of the motor 7 is connected to the other end of the several rotating shafts 12 via a connection mechanism. The connecting mechanism includes a fixing plate 14 fixed to the bottom of several fixing blocks 12. A second rotating shaft 15 is mounted on the fixing plate 14 via a bearing. One end of the second rotating shaft 15 is connected to the output shaft of the motor 7 via a coupling. A second bevel gear 16 is fixedly mounted on the outer side of the other end of the second rotating shaft 15. A third bevel gear 17 is fixedly mounted on one end of each of the several first rotating shafts 12. The second bevel gear 16 meshes with the several third bevel gears 17. The several third bevel gears 16 are arranged symmetrically around the second bevel gear 16.

[0026] Operating procedure: Start motor 7. The output shaft of motor 7 will drive the second rotating shaft 15 to rotate. The second rotating shaft 15 will drive the second bevel gear 16 to rotate. The second bevel gear 16 will drive the first rotating shaft 12 to rotate through several meshing third bevel gears 17. The first rotating shaft 12 will drive several first bevel gears 13 to rotate. The several first bevel gears 13 will drive several meshing bevel ring sleeves 12 to rotate. During the rotation of the bevel ring sleeves 12, the threaded column 6 will rotate through the locking block 10. As the threaded column 6 rotates on the threaded sleeve 5, the locking block 10 slides on the long groove 9, so that the threaded column 6 can slide on the bevel ring sleeves 12 during the rotation of the threaded sleeve 5. This reduces the difficulty of raising and lowering the top of the threaded column 6 with the height of the platform 2.

[0027] Example 3: In Example 2, after the bevel gear ring 8, the first bevel gear 13, the second bevel gear 16, and the third bevel gear 17 mesh, tooth breakage is prone to occur at the bevel gear positions, thus reducing the service life of the equipment. Optimizations are made based on Examples 1-2, referencing... Figure 1-5 Both the working surfaces of the locking block 10 and the long groove 9 are coated with a wear-resistant coating. The wear-resistant coating is formed by spraying ceramic particles, which makes the contact surface of the locking block 10 and the long groove 9 less prone to wear, thus making the equipment less susceptible to damage. The working surfaces of the bevel gear ring 8, the first bevel gear 13, the second bevel gear 16, and the third bevel gear 17 are all coated with a nitriding hardening layer, which improves the mechanical properties of the bevel gear ring 8, the first bevel gear 13, the second bevel gear 16, and the third bevel gear 17, reduces the probability of tooth breakage during meshing of these bevel gears, and makes these bevel gears less prone to damage during meshing transmission, thereby increasing the service life of the equipment.

[0028] Example 4: In Example 1, both the bottom of the threaded posts 6 and the platform 2 are open, allowing machining debris to easily enter the area where the threaded posts 6 and the threaded sleeve 5 mate, thus making the threads of the threaded posts 6 susceptible to damage. An optimization is made based on Example 1, referencing... Figure 3-6 A telescopic platform 18 is provided on the outer side of the base 1. The telescopic platform 18 is connected to the bottom edge of the platform 2. The telescopic platform 18 can extend and retract according to the lifting and lowering of the platform 2. This ensures that all the threaded columns 6 are in a sealed state, making them less prone to damage.

[0029] Example 5: An optimization based on Example 1, with reference to... Figure 1-5 Each of the jaws of the fixed chuck 2 is connected to a clamping block 19, the inner side of which is rounded and has anti-slip texture. This makes the fixed chuck 2 clamp the hollow shaft more securely, thus making the machining of the hollow shaft safer.

[0030] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A lifting mechanism for a hollow shaft processing equipment, comprising a base (1), characterized in that, The base (1) is provided with a platform (2) on top, and a fixed chuck (3) is provided on top of the platform (2). The base (1) is provided with a cavity (4) at the bottom, and a lifting mechanism is provided in the cavity (4). The lifting mechanism is connected to the bottom of the platform (2). The lifting mechanism includes several threaded sleeves (5) fixed to the top of the base (1), and each of the several threaded sleeves (5) is threaded with a threaded post (6). One end of each of the several threaded posts (6) is mounted on the bottom of the platform (2) through a bearing. A drive assembly is provided in the cavity (4), and the drive assembly is connected to the several threaded sleeves (5).

2. The lifting mechanism for hollow shaft processing equipment according to claim 1, characterized in that, The driving mechanism includes a motor (7) fixed at the bottom of the cavity (4), a transmission mechanism is provided in the cavity (4), the transmission mechanism is connected to the motor (7), a plurality of threaded sleeves (5) are all fitted with bevel gear ring sleeves (8) through bearings at the bottom, the plurality of bevel gear ring sleeves (8) are all connected to the transmission mechanism, a long groove (9) is provided on one side of a plurality of threaded columns (6), a locking block (10) is provided inside the plurality of bevel gear ring sleeves (8), and one end of the locking block (10) is slidably disposed in the long groove (9).

3. The lifting mechanism for hollow shaft processing equipment according to claim 2, characterized in that, The working surfaces of the card block (10) and the long groove (9) are both provided with wear-resistant coatings.

4. The lifting mechanism for hollow shaft processing equipment according to claim 2, characterized in that, The transmission mechanism includes several fixed blocks (11) fixed to the bottom of the base (1). Each of the fixed blocks (11) is equipped with a first rotating shaft (12) via bearings. Each of the first rotating shafts (12) is equipped with a first bevel gear (13) at one end. The first bevel gear (13) meshes with a bevel gear ring (8). The output shaft of the motor (7) is connected to the other end of the rotating shafts (12) via a connection mechanism.

5. The lifting mechanism for hollow shaft processing equipment according to claim 4, characterized in that, The connecting mechanism includes a fixing plate (14) fixed to the bottom of several fixing blocks (12). A second rotating shaft (15) is provided on the fixing plate (14) via a bearing. One end of the second rotating shaft (15) is connected to the output shaft of the motor (7). A second bevel gear (16) is provided on the outer side of the other end of the second rotating shaft (15). A third bevel gear (17) is installed on one end of several first rotating shafts (12). The second bevel gear (16) meshes with several third bevel gears (17).

6. The lifting mechanism for hollow shaft processing equipment according to claim 5, characterized in that, Several of the third bevel gears (16) are arranged symmetrically around the second bevel gear (16).

7. The lifting mechanism for hollow shaft processing equipment according to claim 5, characterized in that, A nitriding hardening layer is provided on the working surfaces of the bevel gear ring sleeve (8), the first bevel gear (13), the second bevel gear (16), and the third bevel gear (17).

8. The lifting mechanism for hollow shaft processing equipment according to claim 1, characterized in that, A telescopic platform (18) is provided on the outside of the base (1), and the telescopic platform (18) is connected to the bottom edge of the platform (2).

9. The lifting mechanism for hollow shaft processing equipment according to claim 1, characterized in that, The fixed chuck (2) has several jaws connected to clamping blocks (19), and the inner side of each clamping block (19) is arc-shaped and has anti-slip texture.

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