An efficient automatic assembly device and assembly process for a rotating shaft

Abstract

The present invention relates to the field of assembly technology, and discloses an efficient automatic assembly device for a rotating shaft, including a turntable driven by a motor to rotate, and a drive installed on a support column. A first upright column for inserting the rotating shaft and a second upright column for placing bearings are fixedly installed on the turntable; a grasping cylinder is fixedly installed at the power output end of the drive, and the motor drives the turntable to rotate so that the first upright column and the second upright column are alternately located directly below the grasping cylinder. In the present invention, the design of the grasping cylinder simultaneously realizes the functions of a manipulator for grasping the rotating shaft, an oiling mechanism for applying oil to the rotating shaft, and a pressing mechanism for pressing the rotating shaft into the bearing in the prior art, greatly reducing the components of the entire assembly device and significantly reducing the manufacturing cost and maintenance cost. Moreover, the oiling process is realized during the process of grasping the rotating shaft, eliminating the need for a separate oiling operation, reducing the operation steps in the entire assembly process, and improving the assembly speed.

Description

Technical Field

[0001] The present invention relates to the technical field of assembly, and particularly relates to an efficient automatic assembly device and assembly process for a rotating shaft. Background Art

[0002] When a rotating shaft is in use, in order to reduce the friction coefficient during its movement and ensure its rotational accuracy, bearings are assembled for it. Depending on the usage scenario of the rotating shaft, the bearings assembled for the rotating shaft may be one, two or even more. To improve the assembly efficiency, in the prior art, a special assembly device is usually used for assembling the rotating shaft.

[0003] There are many types of existing assembly devices, but most of them include a conveying mechanism for components, a gripping manipulator for gripping and placing components on a work station, an oiling mechanism for applying oil to the rotating shaft before assembly to reduce the friction during pressing, a pressing mechanism for pressing the rotating shaft into the bearing, a detection mechanism for detecting whether the assembled assembly lacks components, and a blanking mechanism for removing the assembled rotating shaft and bearing, etc.

[0004] Although the automatic assembly of the rotating shaft and the bearing can be achieved through the sequential cooperation of each link, it is found that there are at least the following deficiencies in the prior art during the actual operation process:

[0005] In the prior art, since the manipulator for gripping the rotating shaft, the oiling mechanism for applying oil to the rotating shaft, and the pressing mechanism for pressing the rotating shaft into the bearing are three components with completely different structures, the number of components of the entire assembly device increases, resulting in an increase in manufacturing costs and maintenance costs. Moreover, the manipulator, the oiling mechanism, and the pressing mechanism operate sequentially in a cooperative manner during work, which undoubtedly increases the number of operation links in the entire assembly process and reduces the assembly speed. Thus, it is an urgent technical problem to be solved how to reduce the number of components of the assembly device and reduce the operation procedures in the entire assembly process of the rotating shaft and the bearing to improve the assembly speed. Summary of the Invention

[0006] The purpose of the present invention is to provide an efficient automatic assembly device and assembly process for a rotating shaft to solve the above deficiencies in the prior art.

[0007] To achieve the above purpose, the present invention provides the following technical solution: An efficient automatic assembly device for a rotating shaft, including a turntable driven by a motor to rotate, and a drive installed on a support column. A first column for inserting the rotating shaft and a second column for placing the bearing are fixedly installed on the turntable;

[0008] A gripping cylinder is fixedly installed at the power output end of the drive, and the motor drives the turntable to rotate so that the first column and the second column are alternately located directly below the gripping cylinder;

[0009] An inner sliding tube is elastically slidably arranged in the inner cavity of the grasping cylinder. A through hole is formed in the center of the inner sliding tube, and the inner wall of the through hole is slidably attached to the outer peripheral surface of the rotating shaft. The inner sliding tube is filled with oil-absorbing cotton. When the first upright post is located directly below the grasping cylinder, during the process of the driving force causing the grasping cylinder to move downward, the rotating shaft penetrates through the through hole so that the lubricating oil in the oil-absorbing cotton is smeared on the outer peripheral surface of the rotating shaft;

[0010] An insertion groove for inserting the end of the rotating shaft is formed at the top of the inner cavity of the grasping cylinder. A plurality of arc-shaped elastic pieces arranged at equal circumferential intervals are fixedly installed in the insertion groove. After the rotating shaft penetrates through the through hole, the end of the rotating shaft is inserted into the insertion groove and clamped by the plurality of arc-shaped elastic pieces so that the grasping cylinder grasps the rotating shaft;

[0011] After the rotating shaft is grasped by the grasping cylinder and moves upward, then the turntable rotates so that the second upright post rotates to be directly below the grasping cylinder. Then the grasping cylinder moves downward again so that the grasping cylinder pushes and presses the rotating shaft into the bearing.

[0012] For the above-mentioned high-efficiency automatic assembly equipment for the rotating shaft, the inner sliding tube includes a partition tube fixed inside it so that the inside of the inner sliding tube is divided into a through hole and an oil storage cavity. The oil storage cavity is filled with oil-absorbing cotton, and a plurality of leakage holes are formed in the partition tube so that the oil-absorbing cotton fills the plurality of leakage holes.

[0013] For the above-mentioned high-efficiency automatic assembly equipment for the rotating shaft, a plurality of compression springs arranged at equal circumferential intervals are fixedly installed between the top of the inner sliding tube and the top surface of the inner cavity of the grasping cylinder to realize the elastic sliding of the inner sliding tube.

[0014] For the above-mentioned high-efficiency automatic assembly equipment for the rotating shaft, when the end of the rotating shaft is clamped by the plurality of arc-shaped elastic pieces, the bottom height of the outer peripheral surface of the rotating shaft is higher than the bottom height of the inner sliding tube so that the entire outer peripheral surface of the rotating shaft is smeared with lubricating oil. At the same time, when the grasping cylinder presses the rotating shaft into the bearing, the bottom of the inner sliding tube first abuts against the top of the bearing so that the inner sliding tube axially elastically presses and fixes the bearing.

[0015] For the above-mentioned high-efficiency automatic assembly equipment for the rotating shaft, the inner sliding tube is made of a material that is not easily deformed so that during the process of pressing the rotating shaft into the bearing, based on the sliding fit between the inner wall of the through hole and the outer peripheral surface of the rotating shaft, the inner sliding tube supports the rotating shaft to prevent the rotating shaft from generating radial deformation.

[0016] For the above-mentioned high-efficiency automatic assembly equipment for the rotating shaft, the diameter of the inner cavity of the grasping cylinder is the same as the diameter of the outer peripheral surface of the bearing. The bottom of the grasping cylinder is integrally provided with a horn tube that bends outward. During the process of the grasping cylinder driving the rotating shaft to move downward and insert into the bearing, the inner wall of the horn tube first slidably abuts against the top of the outer peripheral surface of the bearing so that the bearing accurately enters the inner cavity of the grasping cylinder and is coaxial with the rotating shaft, thereby realizing the centering of the bearing and the rotating shaft.

[0017] In the above-mentioned high-efficiency automatic assembly device for a rotating shaft, during the process of inserting the rotating shaft into the bearing, the inner sliding tube slides upward elastically so that the compression spring stores elastic force. After the assembly of the rotating shaft and the bearing is completed, during the upward movement of the grasping cylinder, the elastic force of the compression spring is released to push the end of the rotating shaft away from the multiple arc-shaped elastic pieces, thereby automatically separating the assembled rotating shaft from the grasping cylinder.

[0018] In the above-mentioned high-efficiency automatic assembly device for a rotating shaft, a second jack is provided at the center of the second column so that the rotating shaft can be further inserted into the second jack during the process of inserting the rotating shaft into the bearing. The diameter of the second jack is larger than the diameter of the outer peripheral surface of the rotating shaft. When the bearing is not successfully placed on the second column, after the rotating shaft is driven by the grasping cylinder to move downward and insert into the second jack, and then the grasping cylinder moves upward again to release the elastic force of the compression spring, the compression spring cannot push the end of the rotating shaft away from the multiple arc-shaped elastic pieces, thus preventing the appearance of defective assembled bodies lacking bearings.

[0019] In the above-mentioned high-efficiency automatic assembly device for a rotating shaft, a first jack is provided at the center of the first column. The first jack penetrates the top and bottom of the first column. A plurality of support elastic pieces for supporting the rotating shaft and arranged circumferentially are fixedly installed at the bottom of the first jack. When the rotating shaft clamped in the grasping cylinder does not separate from the multiple arc-shaped elastic pieces and continues to move downward to grasp the next rotating shaft, the rotating shaft clamped in the grasping cylinder presses downward on the rotating shaft on the first column, causing the rotating shaft on the first column to press downward on the plurality of support elastic pieces to deform and separate from the first column.

[0020] A high-efficiency automatic assembly process for a rotating shaft, which is based on the above-mentioned high-efficiency automatic assembly device for a rotating shaft, includes the following steps:

[0021] S1: Loading: Insert the rotating shaft into the first column, and place the bearing on the top of the second column.

[0022] S2: Grasping the rotating shaft: Start the motor to drive the turntable to rotate a specific angle so that the first column with the rotating shaft inserted rotates to directly below the grasping cylinder. Then start the drive to drive the grasping cylinder to move vertically downward so that the rotating shaft is inserted into the grasping cylinder. During this process, the rotating shaft first penetrates the through hole so that the lubricating oil in the oil-absorbing cotton is applied to the outer peripheral surface of the rotating shaft. As the grasping cylinder continues to move downward, the end of the rotating shaft is inserted into the insertion slot and elastically clamped by the multiple arc-shaped elastic pieces in the insertion slot. Finally, drive the grasping cylinder to move upward to separate the grasped rotating shaft from the first column.

[0023] S3: Pressing and assembling: Start the motor again to drive the turntable to rotate a specific angle so that the second column with the bearing placed rotates to directly below the grasping cylinder. Then start the drive again to drive the grasping cylinder to move vertically downward. The downward movement of the grasping cylinder drives the rotating shaft to move downward synchronously so that the grasping cylinder pushes the rotating shaft into the bearing to complete the assembly.

[0024] Beneficial effects:

[0025] In the above technical solution, an efficient automatic assembly device and assembly process for a rotating shaft provided by the present invention integrate multiple functions with a simple structure through the structural design of the grasping cylinder. First, during the process of the grasping cylinder grasping the rotating shaft, the rotating shaft is first inserted into the through hole and lubricated by the downward movement of the grasping cylinder, thus realizing the function of the oiling mechanism in the prior art; after lubrication, the end of the rotating shaft continues to be inserted into the insertion groove and clamped by multiple arc-shaped elastic pieces, so that the grasping cylinder grasps the rotating shaft, thus realizing the function of the manipulator in the prior art; after the grasping cylinder grasps the rotating shaft, it moves upward and then downward, and the rotating shaft is pressed into the bearing by the downward pressure of the grasping cylinder, thus realizing the function of the pressing mechanism in the prior art. It can be seen that the design of the grasping cylinder simultaneously realizes the functions of the manipulator for grasping the rotating shaft, the oiling mechanism for lubricating the rotating shaft, and the pressing mechanism for pressing the rotating shaft into the bearing in the prior art, thus greatly reducing the components of the entire assembly device, and also greatly reducing the manufacturing cost and maintenance cost. Moreover, the oiling process is realized during the process of grasping the rotating shaft, and there is no need for a separate oiling operation, which reduces the operation links in the entire assembly process and improves the assembly speed. Therefore, it can be seen that the present invention can effectively solve the deficiencies in the prior art;

[0026] In the present invention, when the end of the rotating shaft is clamped by multiple arc-shaped elastic pieces, the bottom height of the outer peripheral surface of the rotating shaft is higher than the bottom height of the inner sliding tube so that the outer peripheral surface of the rotating shaft is evenly coated with lubricating oil, and at the same time, when the grasping cylinder presses the rotating shaft into the bearing, the bottom of the inner sliding tube first abuts against the top of the bearing so that the inner sliding tube axially elastically presses and fixes the bearing, so that the bearing remains stable when the rotating shaft is pressed into the bearing. Thus, it can be seen that the inner sliding tube not only plays a role in lubricating the rotating shaft, but also plays a role in fixing the bearing;

[0027] Furthermore, the present invention utilizes the non-deformable characteristic of the inner sliding tube. Since the inner sliding tube is sleeved on the rotating shaft when the rotating shaft is pressed into the bearing by the grasping cylinder and the spacer tube is in contact with the rotating shaft, the inner sliding tube not only plays a role in lubricating the rotating shaft and fixing the bearing, but also produces an unexpected technical effect of protecting the rotating shaft from radial deformation;

[0028] More importantly, in the present invention, by integrally providing a horn tube bent outward at the bottom of the grasping cylinder, when the bearing has a displacement deviation, during the process of the grasping cylinder driving the rotating shaft to move downward and insert into the bearing, the inner wall of the horn tube first slides and abuts against the top of the outer peripheral surface of the bearing to push the deviated bearing to move, so that the bearing enters the inner cavity of the grasping cylinder. Based on the fact that the diameter of the inner cavity of the grasping cylinder is the same as the diameter of the outer peripheral surface of the bearing, after the bearing enters the inner cavity of the grasping cylinder, it is coaxial with the grasping cylinder, and the rotating shaft is also coaxial with the grasping cylinder. Therefore, the bearing is coaxial with the rotating shaft, so that even if the bearing has a displacement deviation, the grasping cylinder can center the bearing during the process of the rotating shaft inserting into the bearing, so that the bearing with a displacement deviation is coaxial with the rotating shaft, and an unexpected technical effect is produced during the downward movement of the grasping cylinder;

[0029] By providing a compression spring in the present invention, not only can the inner sliding tube be reset after the assembly is completed, but also the inner sliding tube can be unexpectedly driven to separate the assembled rotating shaft and bearing from the grasping cylinder during the reset process, producing an unexpected technical effect;

[0030] In the prior art, when in an assembly cycle, the rotating shaft is grasped but the bearing is not successfully placed on the work station, if the pressing mechanism continues to perform the pressing operation on the rotating shaft, a defective assembly lacking a bearing will occur. In the present invention, through the special pressing method of the grasping cylinder on the rotating shaft, when the rotating shaft is pressed into the bearing, the bearing pushes the inner sliding tube to move upward to store the elastic force of the compression spring. When there is no bearing, the bottom of the inner sliding tube will not contact the bearing. Therefore, when the grasping cylinder moves upward to release the elastic force of the compression spring, the inner sliding tube cannot apply force to the rotating shaft, and the rotating shaft cannot disengage from the plurality of arc-shaped elastic pieces. When the grasping cylinder moves upward, it will drive the rotating shaft to move upward synchronously. Furthermore, a defective assembly lacking a bearing will not occur, unexpectedly solving the technical problem of the defective assembly lacking a bearing in the prior art, and also saving the setting of a detection mechanism for detecting whether the assembled assembly lacks parts in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0032] Figure 1 It is a schematic structural diagram of an efficient automatic assembly device for a rotating shaft provided by an embodiment of the present invention;

[0033] Figure 2 It is a schematic structural diagram of a first column, a second column and a turntable provided by an embodiment of the present invention;

[0034] Figure 3 Internal sectional view schematic of the grasping cylinder provided by an embodiment of the present invention;

[0035] Figure 4 Provided by an embodiment of the present invention Figure 3 Schematic enlarged structure view of part A in

[0036] Figure 5 Cross-sectional structure view schematic of the inner sliding tube provided by an embodiment of the present invention;

[0037] Figure 6 Cross-sectional structure view schematic when a plurality of arc-shaped elastic pieces provided by an embodiment of the present invention clamp the end of the rotating shaft;

[0038] Figure 7 Cross-sectional structure view schematic when the trumpet tube pushes the bearing to be centered with the rotating shaft during the process of the grasping cylinder driving the rotating shaft to move downward provided by an embodiment of the present invention;

[0039] Figure 8 Cross-sectional structure view schematic when the bearing enters the grasping cylinder and is squeezed by the inner sliding tube provided by an embodiment of the present invention;

[0040] Figure 9 Cross-sectional structure view schematic when the rotating shaft is inserted into the bearing provided by an embodiment of the present invention;

[0041] Figure 10 Cross-sectional structure view schematic of the first upright column provided by an embodiment of the present invention.

[0042] Explanation of reference numerals:

[0043] 1. Support column; 2. Drive; 3. Grasping cylinder; 301. Oil injection hole; 302. Insertion groove; 303. Trumpet tube; 4. Arc-shaped elastic piece; 5. Inner sliding tube; 501. Partition cylinder; 502. Leakage hole; 503. Through hole; 504. Oil receiving cavity; 505. Opening; 6. Oil absorbing cotton; 7. Compression spring; 8. Turntable; 801. Second inner groove; 802. First inner groove; 9. First upright column; 901. First insertion hole; 902. Support elastic piece; 10. Second upright column; 1001. Second insertion hole; 11. Rotating shaft; 12. Bearing; 13. Fixed disk; 14. Motor. Specific embodiments

[0044] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further introduced in detail below in conjunction with the accompanying drawings.

[0045] First embodiment:

[0046] As shown in Figures 1 - 10As shown in the figure, an efficient automatic assembly device for a rotating shaft provided by an embodiment of the present invention includes a turntable 8 driven by a motor 14 to rotate, and a driver 2 installed on a support column 1. A first upright column 9 for inserting a rotating shaft 11 and a second upright column 10 for placing a bearing 12 are fixedly installed on the turntable 8;

[0047] A grasping cylinder 3 is fixedly installed at the power output end of the driver 2. The motor 14 drives the turntable 8 to rotate so that the first upright column 9 and the second upright column 10 are alternately located directly below the grasping cylinder 3;

[0048] An inner sliding tube 5 is elastically slidably arranged in the inner cavity of the grasping cylinder 3. A through hole 503 is opened in the center of the inner sliding tube 5. The inner wall of the through hole 503 is in sliding fit with the outer peripheral surface of the rotating shaft 11. An oil-absorbing cotton 6 is filled in the inner sliding tube 5. When the first upright column 9 is located directly below the grasping cylinder 3, during the process of the driver 2 driving the grasping cylinder 3 to move downward, the rotating shaft 11 passes through the through hole 503 so that the lubricating oil in the oil-absorbing cotton 6 is smeared on the outer peripheral surface of the rotating shaft 11;

[0049] An insertion groove 302 for inserting the end of the rotating shaft 11 is opened at the top of the inner cavity of the grasping cylinder 3. A plurality of arc-shaped elastic pieces 4 arranged at equal circumferential intervals are fixedly installed in the insertion groove 302. After the rotating shaft 11 passes through the through hole 503, the end of the rotating shaft 11 is inserted into the insertion groove 302 and clamped by the plurality of arc-shaped elastic pieces 4 so that the grasping cylinder 3 grasps the rotating shaft 11;

[0050] After the rotating shaft 11 is grasped by the grasping cylinder 3 and moves upward, then the turntable 8 rotates so that the second upright column 10 rotates to be directly below the grasping cylinder 3. Then the grasping cylinder 3 moves downward again so that the grasping cylinder 3 presses the rotating shaft 11 into the bearing 12.

[0051] The high-efficiency automatic assembly equipment for the rotating shaft provided in this embodiment is used for press-fitting the rotating shaft and the bearing. The "outer peripheral surface of the rotating shaft 11" involved in the present invention refers to the outer peripheral surface of the cylinder after removing the ends of the rotating shaft 11. The words related to directions and positions in the present invention are relative to the attached drawings. Specifically, the assembly equipment includes a fixedly installed fixed disk 13, a turntable 8 rotatably installed on the fixed disk 13, and a motor 14 fixedly installed on the fixed disk 13. The motor 14 is a reduction motor or a servo motor. The motor 14 is used to drive the turntable 8 to rotate (the rotation mode of the motor 14 driving the turntable 8 is the prior art and will not be elaborated). The turntable 8 rotates cyclically at a set angle, so that the first column 9 and the second column 10 are alternately located directly below the grasping cylinder 3. "Directly below" means coaxial up and down. The first column 9 and the second column 10 are both fixedly installed on the turntable 8. The height of the second column 10 is higher than the height of the first column 9. A first insertion hole 901 is opened in the center of the first column 9 for inserting the rotating shaft 11. The diameter of the first insertion hole 901 is adapted to the diameter of the outer peripheral surface of the rotating shaft 11. A second insertion hole 1001 is opened in the center of the second column 10. The second insertion hole 1001 is used to avoid the rotating shaft 11 when the rotating shaft 11 is inserted into the bearing 12. The outer diameter of the second column 10 is equal to or smaller than the outer diameter of the bearing 12 so that the second column 10 can be inserted into the grasping cylinder 3. The outer diameter of the first column 9 is equal to or smaller than the outer diameter of the bearing 12 so that the first column 9 can also be inserted into the grasping cylinder 3.

[0052] In this embodiment, the actuator 2 is installed on the support column 1. The actuator 2 is a servo cylinder, an electric cylinder, a hydraulic cylinder, etc. During operation, the position of the actuator 2 is fixed, and a grasping cylinder 3 is fixedly installed at the power output end of the actuator 2. Thus, when the actuator 2 is started, it can drive the grasping cylinder 3 to move axially up and down. In the present invention, the up and down movement of the grasping cylinder 3 can achieve multiple functions such as grasping the rotating shaft 11, greasing the rotating shaft 11, and pressing down the rotating shaft 11 to insert the rotating shaft 11 into the bearing 12.

[0053] Among them, the specific implementation methods of the multiple functions achieved by the grasping cylinder 3 are as follows:

[0054] The bottom of the grasping cylinder 3 is open, and the top is fixedly connected to the power output end of the drive 2. An inner sliding tube 5 is elastically slidably arranged in the inner cavity of the grasping cylinder 3. A through hole 503 is provided for the rotation shaft 11 to be inserted. The diameter of the through hole 503 is adapted to the diameter of the outer peripheral surface of the rotation shaft 11 so that when the rotation shaft 11 is inserted into the through hole 503, the outer peripheral surface of the rotation shaft 11 fits against the inner wall of the through hole 503. The inner sliding tube 5 is coaxial with the grasping cylinder 3, and when the first upright column 9 with the rotation shaft 11 inserted is located directly below the grasping cylinder 3, the rotation shaft 11 is coaxial with the grasping cylinder 3, so that the inner sliding tube 5 is also coaxial with the rotation shaft 11. Therefore, when the grasping cylinder 3 moves downward, the rotation shaft 11 can be inserted into the through hole 503. The inner sliding tube 5 is filled with oil-absorbing cotton 6, and the oil-absorbing cotton 6 adsorbs lubricant. When the rotation shaft 11 is inserted into the through hole 503, the lubricant in the oil-absorbing cotton 6 is applied to the outer peripheral surface of the rotation shaft 11 to achieve the oiling effect on the rotation shaft 11;

[0055] At the same time, the insertion groove 302 is coaxial with the grasping cylinder 3. A plurality of arc-shaped elastic pieces 4 fixedly installed in the insertion groove 302 and arranged at equal circumferential intervals are used to clamp the end of the rotation shaft 11. During the process of the rotation shaft 11 being inserted into the grasping cylinder 3, the rotation shaft 11 passes through the through hole 503 and then enters the insertion groove 302 and is elastically clamped by the plurality of arc-shaped elastic pieces 4. Then, the drive 2 drives the grasping cylinder 3 to move upward, and the upward movement of the grasping cylinder 3 drives the rotation shaft 11 to move upward synchronously, thus realizing the grasping effect on the rotation shaft 11;

[0056] After the rotation shaft 11 is grasped and moved upward, the first upright column 9 is moved away from directly below the grasping cylinder 3 by the rotation of the turntable 8. At the same time, the second upright column 10 with the bearing 12 placed on it rotates to directly below the grasping cylinder 3. Then, the drive 2 drives the grasping cylinder 3 to move downward again. At this time, the second upright column 10, the bearing 12 and the grasping cylinder 3 are all coaxial. Therefore, the downward movement of the grasping cylinder 3 presses the rotation shaft 11 into the bearing 12 until the rotation shaft 11 is inserted to an appropriate depth, thereby realizing the function of pressing the rotation shaft 11 into the bearing 12. The rotation shaft 11 extending below the bearing 12 is inserted into the second jack 1001, thereby realizing the assembly of the rotation shaft 11 and the bearing 12.

[0057] The working principle is as follows: First, the rotating shaft 11 can be inserted into the first column 9 in sequence by the manipulator, and the bearing 12 is placed on the top of the second column 10, or directly manually operated by the operator, which will not be elaborated. Then, the motor 14 is started to drive the turntable 8 to rotate a specific angle so that the first column 9 inserted with the rotating shaft 11 rotates to directly below the grasping cylinder 3. Then, the drive 2 is started to drive the grasping cylinder 3 to move vertically downward so that the rotating shaft 11 is inserted into the grasping cylinder 3. During this process, the rotating shaft 11 first penetrates through the through hole 503 so that the lubricating oil in the oil-absorbing cotton 6 is smeared on the outer peripheral surface of the rotating shaft 11. As the grasping cylinder 3 continues to move downward, the end of the rotating shaft 11 is inserted into the insertion slot 302 and elastically clamped by a plurality of arc-shaped elastic pieces 4 in the insertion slot 302. Finally, the drive 2 drives the grasping cylinder 3 to move upward to grasp the rotating shaft 11 and separate it from the first column 9. Then, the motor 14 is started again to drive the turntable 8 to rotate a specific angle so that the second column 10 with the bearing 12 placed on it rotates to directly below the grasping cylinder 3. Then, the drive 2 is started again to drive the grasping cylinder 3 to move vertically downward. The downward movement of the grasping cylinder 3 drives the rotating shaft 11 to move downward synchronously so that the grasping cylinder 3 presses the rotating shaft 11 into the bearing 12 to complete the assembly.

[0058] It can be seen that through the structural design of the grasping cylinder 3, the present invention enables a simple structure to integrate multiple functions. First, during the process of the grasping cylinder 3 grasping the rotating shaft 11, the downward movement of the grasping cylinder 3 causes the rotating shaft 11 to be first inserted into the through hole 503 for oiling, thus realizing the function of the oiling mechanism in the prior art. After oiling, the end of the rotating shaft 11 continues to be inserted into the insertion slot 302 and clamped by a plurality of arc-shaped elastic pieces 4, so that the grasping cylinder 3 grasps the rotating shaft 11, thus realizing the function of the manipulator in the prior art. After the grasping cylinder 3 grasps the rotating shaft 11 and moves upward and then downward, the downward pressure of the grasping cylinder 3 causes the rotating shaft 11 to be pressed into the bearing 12, thus realizing the function of the pressing mechanism in the prior art. It can be seen that the design of the grasping cylinder 3 simultaneously realizes the functions of the manipulator for grasping the rotating shaft, the oiling mechanism for oiling the rotating shaft, and the pressing mechanism for pressing the rotating shaft into the bearing in the prior art, thereby greatly reducing the components of the entire assembly equipment and significantly reducing the manufacturing cost and maintenance cost. Moreover, the oiling process is realized during the process of grasping the rotating shaft 11, and there is no need for a separate oiling operation, which reduces the operation links in the entire assembly process and improves the assembly speed. Therefore, the present invention can effectively solve the deficiencies in the prior art.

[0059] In this embodiment, the inner sliding tube 5 includes a partition cylinder 501 fixedly arranged inside it, so that the inside of the inner sliding tube 5 is divided into a through hole 503 and an oil storage cavity 504. The oil storage cavity 504 is filled with oil-absorbing cotton 6, and a number of leakage holes 502 are formed in the partition cylinder 501 to enable the oil-absorbing cotton 6 to fill a number of the leakage holes 502. Specifically, the leakage holes 502 are used to connect the through hole 503 and the oil storage cavity 504, and the oil-absorbing cotton 6 fills a number of the leakage holes 502, so that when the rotating shaft 11 is inserted into the through hole 503, the outer peripheral surface of the rotating shaft 11 can contact the oil-absorbing cotton 6, and thus the lubricating oil in the oil-absorbing cotton 6 can be applied to the outer peripheral surface of the rotating shaft 11.

[0060] Among them, a plurality of compression springs 7 arranged at equal circumferential intervals are fixedly installed between the top of the inner sliding tube 5 and the top surface of the inner cavity of the grasping cylinder 3 to realize the elastic sliding of the inner sliding tube 5, that is, the elastic sliding of the inner sliding tube 5 is realized by using the elastic force of the compression springs 7.

[0061] In this embodiment, when the end of the rotating shaft 11 is clamped by a plurality of arc-shaped elastic pieces 4, the bottom height of the outer peripheral surface of the rotating shaft 11 is higher than the bottom height of the inner sliding tube 5, so that the outer peripheral surface of the rotating shaft 11 is evenly coated with lubricating oil. At the same time, when the grasping cylinder 3 presses the rotating shaft 11 into the bearing 12, the bottom of the inner sliding tube 5 first abuts against the top of the bearing 12, so that the inner sliding tube 5 axially elastically presses and fixes the bearing 12, so that the bearing 12 remains stable when the rotating shaft 11 is pressed into the bearing 12. Thus, it can be seen that the inner sliding tube 5 not only plays a role in applying oil to the rotating shaft 11, but also plays a role in fixing the bearing 12, so that the bearing 12 is more stable when the rotating shaft 11 is pressed into the bearing 12, thereby making the pressing action more stable.

[0062] Furthermore, the inner sliding tube 5 is made of a material that is not easily deformed, so that during the process of pressing the rotating shaft 11 into the bearing 12, the inner sliding tube 5 supports the rotating shaft 11 to prevent the rotating shaft 11 from generating radial deformation due to the sliding fit between the inner wall of the through hole 503 and the outer peripheral surface of the rotating shaft 11. Specifically, in the present invention, the inner sliding tube 5 is made of materials such as stainless steel, high-carbon steel, cemented carbide, titanium alloy or ceramic. By using the non-deformable characteristic of the inner sliding tube 5, since the inner sliding tube 5 is sleeved on the rotating shaft 11 when the rotating shaft 11 is pressed into the bearing 12 by the grasping cylinder 3, and the partition cylinder 501 is in contact with the rotating shaft 11, the inner sliding tube 5 not only plays a role in applying oil to the rotating shaft 11 and fixing the bearing 12, but also produces an unexpected technical effect of protecting the rotating shaft 11 from generating radial deformation.

[0063] Further, the diameter of the inner cavity of the grasping cylinder 3 is the same as the diameter of the outer peripheral surface of the bearing 12. The bottom of the grasping cylinder 3 is integrally provided with a horn tube 303 that bends outward. During the process of the grasping cylinder 3 driving the rotating shaft 11 to move downward and insert into the bearing 12, the inner wall of the horn tube 303 first slides and abuts against the top of the outer peripheral surface of the bearing 12 so that the bearing 12 accurately enters the inner cavity of the grasping cylinder 3 and is coaxial with the rotating shaft 11, thereby realizing the centering of the bearing 12 and the rotating shaft 11. Specifically, when the bearing 12 is placed on the second column 10, it is necessary to rotate the second column 10 to directly below the grasping cylinder 3 so that the bearing 12 and the rotating shaft 11 are coaxial, so as to ensure that the rotating shaft 11 accurately inserts into the bearing 12. However, during the rotation of the turntable 8, a centrifugal force will be generated on the bearing 12 placed on the second column 10, making the bearing 12 prone to displacement deviation, resulting in the bearing 12 and the rotating shaft 11 not being coaxial when the second column 10 rotates to directly below the grasping cylinder 3. Therefore, in the present invention, by integrally providing a horn tube 303 that bends outward at the bottom of the grasping cylinder 3, when the bearing 12 has a displacement deviation, during the process of the grasping cylinder 3 driving the rotating shaft 11 to move downward and insert into the bearing 12, the inner wall of the horn tube 303 first slides and abuts against the top of the outer peripheral surface of the bearing 12 to push the displaced bearing 12 to move, so that the bearing 12 enters the inner cavity of the grasping cylinder 3. Based on the fact that the diameter of the inner cavity of the grasping cylinder 3 is the same as the diameter of the outer peripheral surface of the bearing 12, after the bearing 12 enters the inner cavity of the grasping cylinder 3, it is coaxial with the grasping cylinder 3, and the rotating shaft 11 is also coaxial with the grasping cylinder 3. Therefore, the bearing 12 and the rotating shaft 11 are coaxial, so that even if the bearing 12 has a displacement deviation, the grasping cylinder 3 can center the bearing 12 during the process of the rotating shaft 11 inserting into the bearing 12 so that the displaced bearing 12 and the rotating shaft 11 are coaxial, making the grasping cylinder 3 produce an unexpected technical effect during the downward movement.

[0064] In this embodiment, during the process of inserting the rotating shaft 11 into the bearing 12, the inner sliding tube 5 elastically slides upward to store the elastic force of the compression spring 7. After the assembly of the rotating shaft 11 and the bearing 12 is completed, during the upward movement of the grasping cylinder 3, the elastic force of the compression spring 7 is released to push the end of the rotating shaft 11 away from the plurality of arc-shaped elastic pieces 4, thereby automatically separating the assembled rotating shaft 11 and the grasping cylinder 3. Specifically, during the process of pressing the rotating shaft 11 into the bearing 12, since the bottom of the inner sliding tube 5 abuts against the bearing 12, the inner sliding tube 5 continuously slides upward, and the sliding of the inner sliding tube 5 continuously compresses the compression spring 7 to store the elastic force. When the pressing of the rotating shaft 11 is completed, the elastic force stored in the compression spring 7 is greater than the frictional force between the plurality of arc-shaped elastic pieces 4 and the end of the rotating shaft 11. Therefore, when the grasping cylinder 3 moves upward, under the action of the elastic force of the compression spring 7, the inner sliding tube 5 generates a downward thrust on the bearing 12. Since the rotating shaft 11 is pressed into the bearing 12, under the action of the elastic force of the compression spring 7, the inner sliding tube 5 pushes the rotating shaft 11 away from the plurality of arc-shaped elastic pieces 4, and finally the assembled rotating shaft 11 and bearing 12 are separated from the grasping cylinder 3. Finally, after the elastic force of the compression spring 7 is released, the inner sliding tube 5 is reset. It can be seen that by setting the compression spring 7, the present invention can not only reset the inner sliding tube 5 after the assembly is completed, but also unexpectedly drive the inner sliding tube 5 to separate the assembled rotating shaft 11 and bearing 12 from the grasping cylinder 3 during the reset process, resulting in unexpected technical effects.

[0065] In this embodiment, a second jack 1001 is provided at the center of the second column 10 so that the rotating shaft 11 can be further inserted into the second jack 1001 during the process of inserting the rotating shaft 11 into the bearing 12. The diameter of the second jack 1001 is larger than the diameter of the outer peripheral surface of the rotating shaft 11. When the bearing 12 is not successfully placed on the second column 10, the rotating shaft 11 is driven by the grasping cylinder 3 to move downward and inserted into the second jack 1001. Then, when the grasping cylinder 3 moves upward again to release the elastic force of the compression spring 7, the compression spring 7 cannot push the end of the rotating shaft 11 to separate from the plurality of arc-shaped elastic pieces 4, so that there will be no defective assembly lacking the bearing 12. Specifically, in the prior art, when in an assembly cycle, the rotating shaft 11 is grasped but the bearing 12 is not successfully placed on the working station, if the pressing mechanism continues to perform the pressing operation on the rotating shaft 11, there will be a defective assembly lacking the bearing 12. However, in the present invention, through the special pressing method of the grasping cylinder 3 on the rotating shaft 11, the elastic force of the compression spring 7 is stored by the upward movement of the inner sliding tube 5 pushed by the bearing 12 during the process of pressing the rotating shaft 11 into the bearing 12. When there is no bearing 12, the bottom of the inner sliding tube 5 will not contact the bearing 12. Therefore, when the grasping cylinder 3 moves upward to release the elastic force of the compression spring 7, the inner sliding tube 5 cannot apply force to the rotating shaft 11, and the rotating shaft 11 cannot be separated from the plurality of arc-shaped elastic pieces 4. When the grasping cylinder 3 moves upward, it will drive the rotating shaft 11 to move upward synchronously. Thus, there will be no defective assembly lacking the bearing 12, unexpectedly solving the technical problem of the defective assembly lacking the bearing 12 in the prior art, and also saving the setting of the detection mechanism for detecting whether the assembled assembly lacks components in the prior art.

[0066] Furthermore, a first jack 901 is provided at the center of the first column 9. The first jack 901 penetrates through the top and bottom of the first column 9. At the bottom of the first jack 901, a plurality of supporting elastic pieces 902 for supporting the rotating shaft 11 and arranged circumferentially are fixedly installed. When the rotating shaft 11 clamped in the grasping cylinder 3 does not separate from the plurality of arc-shaped elastic pieces 4 and continues to move downward to grasp the next rotating shaft 11, the rotating shaft 11 clamped in the grasping cylinder 3 presses downward on the rotating shaft 11 on the first column 9, so that the rotating shaft 11 on the first column 9 presses downward on the plurality of supporting elastic pieces 902 to deform and separate from the first column 9, so as to prevent the two rotating shafts 11 from being continuously pressed and getting stuck.

[0067] In this embodiment, a second inner groove 801 corresponding to the second column 10 and a first inner groove 802 corresponding to the first column 9 are formed at the top of the turntable 8. The diameter of the second inner groove 801 is larger than the outer diameter of the second column 10, and the diameter of the first inner groove 802 is larger than the outer diameter of the first column 9. The second inner groove 801 and the first inner groove 802 have the same function, which is to easily avoid the horn tube 303 during the downward movement of the grasping cylinder 3. The second column 10 is fixedly installed in the second inner groove 801, and the first column 9 is fixedly installed in the first inner groove 802. An enlarged opening with a diameter larger than the first jack 901 is formed at the bottom of the first column 9. The enlarged opening penetrates through the first inner groove 802 so that when the rotating shaft 11 presses down on the plurality of support elastic pieces 902 to cause deformation and passes through the support elastic pieces 902, it can further pass through the turntable 8 and fall down.

[0068] In this embodiment, an oil injection hole 301 is formed on the grasping cylinder 3, and an opening 505 corresponding to the oil injection hole 301 is formed on the inner sliding tube 5. In the initial state, the oil injection hole 301 and the opening 505 coincide, and it is convenient to add lubricating oil to the oil-absorbing cotton 6 through the oil injection hole 301 and the opening 505.

[0069] Second Embodiment:

[0070] As Figures 1 - 10 shown, an efficient automatic assembly process for a rotating shaft includes the following steps:

[0071] S1: Loading: Insert the rotating shaft 11 into the first column 9, and place the bearing 12 on the top of the second column 10.

[0072] S2: Grasping the rotating shaft 11: Start the motor 14 to drive the turntable 8 to rotate a specific angle so that the first column 9 inserted with the rotating shaft 11 rotates to directly below the grasping cylinder 3, and then start the drive 2 to drive the grasping cylinder 3 to move vertically downward so that the rotating shaft 11 is inserted into the grasping cylinder 3. During this process, the rotating shaft 11 first passes through the through hole 503 so that the lubricating oil in the oil-absorbing cotton 6 is applied to the outer peripheral surface of the rotating shaft 11. As the grasping cylinder 3 continues to move downward, the end of the rotating shaft 11 is inserted into the insertion groove 302 and elastically clamped by a plurality of arc-shaped elastic pieces 4 in the insertion groove 302. Finally, the drive 2 drives the grasping cylinder 3 to move upward to grasp the rotating shaft 11 and separate it from the first column 9.

[0073] S3: Pressing and assembling: Start the motor 14 again to drive the turntable 8 to rotate a specific angle so that the second column 10 placed with the bearing 12 rotates to directly below the grasping cylinder 3, and then start the drive 2 again to drive the grasping cylinder 3 to move vertically downward. The downward movement of the grasping cylinder 3 drives the rotating shaft 11 to move downward synchronously so that the grasping cylinder 3 pushes the rotating shaft 11 into the bearing 12 to achieve assembly.

[0074] S4: Reset: After the assembly is completed, start the drive 2 to drive the gripping cylinder 3 to move upward. The elastic force stored in the compression spring 7 is greater than the frictional force between the multiple arc-shaped elastic pieces 4 and the end of the rotating shaft 11. Thus, when the gripping cylinder 3 moves upward, the elastic force of the compression spring 7 is released. Under the action of the elastic force of the compression spring 7, the inner sliding tube 5 generates a downward thrust on the bearing 12. Since the rotating shaft 11 is pressed into the bearing 12, under the action of the elastic force of the compression spring 7, the inner sliding tube 5 pushes the rotating shaft 11 to separate from the multiple arc-shaped elastic pieces 4, ultimately achieving the purpose of separating the assembled rotating shaft 11 and bearing 12 from the gripping cylinder 3. Finally, after the elastic force of the compression spring 7 is released, the inner sliding tube 5 is reset.

[0075] In step S3, the diameter of the inner cavity of the gripping cylinder 3 is the same as the diameter of the outer peripheral surface of the bearing 12. The bottom of the gripping cylinder 3 is integrally provided with a horn tube 303 that bends outward. During the process of the gripping cylinder 3 driving the rotating shaft 11 to move downward and insert into the bearing 12, the inner wall of the horn tube 303 first slidably abuts against the top of the outer peripheral surface of the bearing 12 so that the bearing 12 accurately enters the inner cavity of the gripping cylinder 3 and is coaxial with the rotating shaft 11, thereby achieving the centering of the bearing 12 and the rotating shaft 11. Specifically, when the bearing 12 is placed on the second column 10, it is necessary to rotate the second column 10 to directly below the gripping cylinder 3 so that the bearing 12 and the rotating shaft 11 are coaxial. Only in this way can it be ensured that the rotating shaft 11 accurately inserts into the bearing 12. However, during the rotation of the turntable 8, a centrifugal force will be generated on the bearing 12 placed on the second column 10, making the bearing 12 prone to displacement deviation, resulting in the bearing 12 and the rotating shaft 11 not being coaxial when the second column 10 rotates to directly below the gripping cylinder 3. Therefore, in the present invention, by integrally providing a horn tube 303 that bends outward at the bottom of the gripping cylinder 3, when the bearing 12 has a displacement deviation, during the process of the gripping cylinder 3 driving the rotating shaft 11 to move downward and insert into the bearing 12, the inner wall of the horn tube 303 first slidably abuts against the top of the outer peripheral surface of the bearing 12 to push the displaced bearing 12 to move, so that the bearing 12 enters the inner cavity of the gripping cylinder 3. Based on the fact that the diameter of the inner cavity of the gripping cylinder 3 is the same as the diameter of the outer peripheral surface of the bearing 12, after the bearing 12 enters the inner cavity of the gripping cylinder 3, it is coaxial with the gripping cylinder 3, and the rotating shaft 11 is also coaxial with the gripping cylinder 3. Therefore, the bearing 12 and the rotating shaft 11 are coaxial, so that even if the bearing 12 has a displacement deviation, the gripping cylinder 3 can center the bearing 12 during the process of the rotating shaft 11 inserting into the bearing 12 so that the bearing 12 with a displacement deviation is coaxial with the rotating shaft 11.

[0076] Among them, in the prior art, when in an assembly cycle, the rotating shaft 11 is grabbed but the bearing 12 is not successfully placed on the work station, if the pressing mechanism continues to perform the pressing operation on the rotating shaft 11, there will be a defective assembly lacking the bearing 12. However, in the present invention, through the special pressing method of the grabbing cylinder 3 on the rotating shaft 11, when the rotating shaft 11 is pressed into the bearing 12, the inner sliding tube 5 is pushed upward by the bearing 12 to store the elastic force of the compression spring 7. When there is no bearing 12, the bottom of the inner sliding tube 5 will not contact the bearing 12. Therefore, when the grabbing cylinder 3 moves upward to release the elastic force of the compression spring 7, the inner sliding tube 5 cannot apply force to the rotating shaft 11, and the rotating shaft 11 cannot be separated from the plurality of arc-shaped elastic pieces 4. When the grabbing cylinder 3 moves upward, it will drive the rotating shaft 11 to move upward synchronously, and thus there will be no defective assembly lacking the bearing 12, unexpectedly solving the technical problem that there will be a defective assembly lacking the bearing 12 in the prior art.

[0077] A first jack 901 is provided at the center of the first column 9. The first jack 901 penetrates through the top and bottom of the first column 9. At the bottom of the first jack 901, a plurality of support elastic pieces 902 for supporting the rotating shaft 11 and arranged circumferentially are fixedly installed. When the rotating shaft 11 clamped in the grabbing cylinder 3 does not separate from the plurality of arc-shaped elastic pieces 4 and continues to move downward to grab the next rotating shaft 11, the rotating shaft 11 clamped in the grabbing cylinder 3 presses downward on the rotating shaft 11 on the first column 9, so that the rotating shaft 11 on the first column 9 presses downward on the plurality of support elastic pieces 902 to deform and separate from the first column 9, so that the two rotating shafts 11 will not be continuously pressed and jammed.

[0078] Only some exemplary embodiments of the present invention have been described by way of illustration above. Undoubtedly, for those of ordinary skill in the art, without departing from the spirit and scope of the present invention, the described embodiments can be modified in various different ways. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A high-efficiency automatic assembly device for a rotating shaft, comprising a turntable (8) driven to rotate by a motor (14), and a drive (2) mounted on a support column (1), characterized in that: A first column (9) for inserting a rotating shaft (11) and a second column (10) for placing a bearing (12) are fixedly mounted on the turntable (8); A grabbing cylinder (3) is fixedly mounted on the power output end of the drive (2), and the motor (14) drives the turntable (8) to rotate so that the first column (9) and the second column (10) are alternately located directly below the grabbing cylinder (3); An inner sliding tube (5) is elastically and slidably provided in the inner cavity of the grabbing cylinder (3), a through hole (503) is provided at the center of the inner sliding tube (5), the inner wall of the through hole (503) is slidably fitted with the outer peripheral surface of the rotating shaft (11), the inner sliding tube (5) is filled with oil-absorbing cotton (6), and when the first column (9) is located directly below the grabbing cylinder (3), the rotating shaft (11) penetrates the through hole (503) during the process of the drive (2) driving the grabbing cylinder (3) to move downward, so that the lubricating oil in the oil-absorbing cotton (6) is smeared on the outer peripheral surface of the rotating shaft (11); An insertion groove (302) is provided at the top of the inner cavity of the grasping cylinder (3) for inserting the end of the rotating shaft (11), and a plurality of arc-shaped spring pieces (4) are fixedly installed in the insertion groove (302) and arranged equidistantly in the circumferential direction. After the rotating shaft (11) passes through the through hole (503), the end of the rotating shaft (11) is inserted into the insertion groove (302) and clamped by the plurality of arc-shaped spring pieces (4) so ​​that the grasping cylinder (3) grasps the rotating shaft (11); The rotating shaft (11) is grasped by the grasping cylinder (3) and then moves upward, after which the turntable (8) rotates to rotate the second column (10) to the position directly below the grasping cylinder (3), and then the grasping cylinder (3) moves downward again to push the rotating shaft (11) into the bearing (12).

2. The high-efficiency automatic assembly equipment for a rotating shaft according to claim 1 is characterized in that: The inner sliding tube (5) includes a partition tube (501) fixed inside the inner sliding tube (5) so that the interior of the inner sliding tube (5) is divided into a through hole (503) and an oil receiving chamber (504), wherein the oil receiving chamber (504) is filled with oil absorbing cotton (6), and a plurality of leakage holes (502) are opened on the partition tube (501) so that the oil absorbing cotton (6) can fill the plurality of leakage holes (502).

3. The high-efficiency automatic assembly equipment for a rotating shaft according to claim 1 is characterized in that: A plurality of compression springs (7) arranged equidistantly in the circumferential direction are fixedly installed between the top of the inner sliding tube (5) and the top surface of the inner cavity of the grabbing cylinder (3) to achieve elastic sliding of the inner sliding tube (5).

4. The high-efficiency automatic assembly equipment for a rotating shaft according to claim 1 is characterized in that: When the end of the rotating shaft (11) is clamped by the plurality of arc-shaped spring sheets (4), the bottom height of the outer peripheral surface of the rotating shaft (11) is higher than the bottom height of the inner sliding tube (5) so that the outer peripheral surface of the rotating shaft (11) is evenly coated with lubricating oil. At the same time, when the grabbing cylinder (3) presses the rotating shaft (11) into the bearing (12), the bottom of the inner sliding tube (5) first abuts against the top of the bearing (12) so that the inner sliding tube (5) axially elastically presses and fixes the bearing (12).

5. The high-efficiency automatic assembly equipment for a rotating shaft according to claim 2 is characterized in that: The inner sliding tube (5) is made of a material that is not easily deformed so that when the rotating shaft (11) is pressed into the bearing (12), the inner wall of the through hole (503) and the outer peripheral surface of the rotating shaft (11) are slidably fitted together so that the inner sliding tube (5) supports the rotating shaft (11) and prevents the rotating shaft (11) from generating radial deformation.

6. The high-efficiency automatic assembly equipment for a rotating shaft according to claim 1 is characterized in that: The diameter of the inner cavity of the grasping cylinder (3) is the same as the diameter of the outer peripheral surface of the bearing (12). The bottom of the grasping cylinder (3) is integrally provided with a bell tube (303) bent outward. When the grasping cylinder (3) drives the rotating shaft (11) to move downward and insert into the bearing (12), the inner wall of the bell tube (303) first slides and abuts against the top of the outer peripheral surface of the bearing (12), so that the bearing (12) accurately enters the inner cavity of the grasping cylinder (3) and is coaxial with the rotating shaft (11), thereby realizing the alignment of the bearing (12) and the rotating shaft (11).

7. The high-efficiency automatic assembly equipment for a rotating shaft according to claim 3 is characterized in that: During the process of inserting the rotating shaft (11) into the bearing (12), the inner sliding tube (5) elastically slides upward to allow the compression spring (7) to store elastic force. After the rotating shaft (11) and the bearing (12) are assembled, the elastic force of the compression spring (7) is released during the upward movement of the grabbing cylinder (3) to push the end of the rotating shaft (11) to separate from the plurality of arc-shaped spring sheets (4), thereby automatically realizing the separation of the assembled rotating shaft (11) and the grabbing cylinder (3).

8. The high-efficiency automatic assembly equipment for a rotating shaft according to claim 7 is characterized in that: A second insertion hole (1001) is provided at the center of the second column (10) so that the rotating shaft (11) can be further inserted into the second insertion hole (1001) during the process of inserting the rotating shaft (11) into the bearing (12). The diameter of the second insertion hole (1001) is larger than the diameter of the outer peripheral surface of the rotating shaft (11). When the second column (10) fails to successfully place the bearing (12), the rotating shaft (11) is driven by the grasping cylinder (3) to move downward and insert into the second insertion hole (1001). After the grasping cylinder (3) moves upward again to release the elastic force of the compression spring (7), the compression spring (7) cannot push the end of the rotating shaft (11) to separate from the multiple arc-shaped spring sheets (4), thereby preventing a defective assembly without the bearing (12) from occurring.

9. The high-efficiency automatic assembly equipment for a rotating shaft according to claim 8, characterized in that: A first plug hole (901) is provided at the center of the first column (9), and the first plug hole (901) passes through the top and bottom of the first column (9). A plurality of supporting spring sheets (902) arranged circumferentially for supporting the rotating shaft (11) are fixedly installed at the bottom of the first plug hole (901). When the rotating shaft (11) clamped in the grasping cylinder (3) is not separated from the plurality of arc-shaped spring sheets (4) and continues to move downward to grasp the next rotating shaft (11), the rotating shaft (11) clamped in the grasping cylinder (3) presses the rotating shaft (11) on the first column (9) downward so that the rotating shaft (11) on the first column (9) presses the plurality of supporting spring sheets (902) downward to deform and separate from the first column (9).

10. A high-efficiency automatic assembly process for a rotating shaft, which is based on the high-efficiency automatic assembly equipment for a rotating shaft according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1: Loading: insert the rotating shaft (11) into the first column (9), and place the bearing (12) on the top of the second column (10); S2: Grab the rotating shaft (11): start the motor (14) to drive the turntable (8) to rotate to a specific angle so that the first column (9) with the rotating shaft (11) inserted therein rotates to the position directly below the grabbing cylinder (3), then start the drive (2) to drive the grabbing cylinder (3) to move vertically downward so that the rotating shaft (11) is inserted into the grabbing cylinder (3). During this process, the rotating shaft (11) first passes through the through hole (503) so that the lubricating oil in the oil-absorbing cotton (6) is smeared on the outer peripheral surface of the rotating shaft (11). As the grabbing cylinder (3) continues to move downward, the end of the rotating shaft (11) is inserted into the insertion groove (302) and is elastically clamped by the multiple arc-shaped spring pieces (4) in the insertion groove (302). Finally, drive (2) drives the grabbing cylinder (3) to move upward so that the rotating shaft (11) is grasped and separated from the first column (9); S3: Press-in assembly: The motor (14) is started again to drive the turntable (8) to rotate to a specific angle so that the second column (10) on which the bearing (12) is placed rotates to the position directly below the grabbing cylinder (3). Then, the drive (2) is started again to drive the grabbing cylinder (3) to move vertically downward. The downward movement of the grabbing cylinder (3) drives the rotating shaft (11) to move downward synchronously so that the grabbing cylinder (3) pushes the rotating shaft (11) to be inserted into the bearing (12) to achieve assembly.

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