Bearing press-fit device

Abstract

The utility model relates to a bearing, and specifically to a bearing pressing device, which solves the problem that the bearing of a movable shaft is not suitable for press-fitting. At present, the installation is mainly carried out by manual hammering, which greatly reduces the installation efficiency. The utility model comprises a frame, an upper support plate, and a lower support plate. A first oil cylinder and a second oil cylinder are arranged on the top plate of the frame, and the oil cylinder rods of the two are respectively connected with the upper and lower support plates. The upper support plate is located between the top plate and the lower support plate. A first through hole is opened on the upper support plate, and a conical sleeve is coaxially connected to the first through hole. An expansion sleeve is connected to the bottom surface of the top plate. Multiple clamping claws of the expansion sleeve are located in the conical hole of the conical sleeve, and the small end of the conical hole faces the lower support plate; a second through hole is arranged on the lower support plate corresponding to the first through hole, and a pressing head for pressing the bearing is connected on the second through hole and located at the bottom surface of the lower support plate. The pressing head is coaxially arranged with the second through hole, and a third through hole is opened at the center of the pressing head.

Description

Technical Field

[0001] The utility model relates to a bearing, in particular to a bearing press-fitting device. Background Art

[0002] Bearings are an important component in mechanical equipment. Their main function is to support mechanical rotating bodies, reduce the friction coefficient during their movement, and ensure their rotation accuracy. The accuracy of bearing assembly determines the function and life of the bearing. Improper assembly can easily cause damage to the bearing. Therefore, bearing assembly and positioning are very critical. If the verticality and position of the bearing cannot be guaranteed during installation, the bearing will be crushed. In the machinery industry, bearing assembly mainly relies on press installation or manual hammering. Presses have high working efficiency and are also the most commonly used bearing assembly device. For example, the Chinese invention patent with application publication number CN116922046A discloses a flexible quick-change positioning tool for fan bracket assembly bearing assembly, including an upper die unit and a lower die unit. The upper die unit includes a pressure head, the diameter of the small diameter shaft section of the pressure head corresponds to the diameter of the inner ring of the bearing to be assembled, and the small diameter shaft section of the pressure head is provided with an elastic telescopic unit. The end surface of the large diameter shaft section of the pressure head facing the lower die unit is provided with a first annular boss, and the first annular boss contacts the outer ring of the bearing to be assembled; the lower die unit includes a positioning support seat, and the positioning support seat is connected with a replaceable positioning ring, the outer diameter of the replaceable positioning ring corresponds to the inner diameter of the bearing mounting hole, and the end surface of the replaceable positioning ring facing the upper die unit is provided with a second annular boss, and the shape of the second annular boss corresponds to the first annular boss. The above invention can effectively avoid the contact between the pressure head and the inner ring of the bearing, and prevent the bearing roller from being stressed and then damaging the bearing.

[0003] However, when using the bearing assembly device disclosed in the above invention, the position of the outer ring of the bearing and the workpiece mounting hole must be fixed, so that the press can directly press the bearing into the workpiece mounting hole when working. If the bearing is installed on a movable shaft, the bearing sleeve is mounted on the movable shaft, and the movable shaft has no axial and radial positioning. If the press is used to directly press the bearing into the workpiece mounting hole, the outer ring of the bearing will shake with the movable shaft and cannot be accurately positioned with the workpiece mounting hole. If it is forced in, the force on the bearing during the whole process is difficult to control, which can easily damage the ball and the outer ring of the bearing and affect the service life of the bearing. Therefore, the current installation mainly relies on manual hammering, which greatly reduces the installation efficiency. Utility Model Content

[0004] The utility model aims to solve the problem that the bearing of a movable shaft is not suitable for press installation and is currently mainly installed by manual hammering, which greatly reduces the installation efficiency, and provides a bearing press installation device.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A bearing press-fitting device, which is special in that it comprises a frame, an upper support plate, a lower support plate and an oil cylinder;

[0007] The lower support plate is provided with a plurality of lower positioning posts, each of which is located in a second positioning hole opened on the top plate of the frame; the upper support plate is located between the lower support plate and the top plate of the frame; the upper support plate is provided with a plurality of upper positioning posts, each of which is located in a first positioning hole opened on the top plate of the frame;

[0008] The oil cylinder comprises a first oil cylinder and a second oil cylinder, both of which are mounted on the top plate of the frame, and the oil cylinder rod of the first oil cylinder passes through the top plate and is connected to the upper support plate, and the oil cylinder rod of the second oil cylinder passes through the top plate and is connected to the lower support plate;

[0009] The upper support plate is provided with a first through hole, a conical sleeve is connected to the first through hole and located at the top surface of the upper support plate, the conical sleeve is coaxially arranged with the first through hole, an expansion sleeve is connected to the bottom surface of the top plate, the expansion sleeve includes a base connected to the bottom surface of the top plate and a plurality of clamping claws arranged on the base and evenly distributed along the circumference, the plurality of clamping claws are all located in the conical hole opened in the center of the conical sleeve, and the small end of the conical hole faces the lower support plate;

[0010] A second through hole is opened on the lower support plate corresponding to the first through hole, a pressure head is connected to the second through hole and located at the bottom surface of the lower support plate, the pressure head is coaxially arranged with the second through hole, and a third through hole is opened in the center of the pressure head.

[0011] Furthermore, the upper positioning column includes a large diameter section and a small diameter section, and the small diameter section is provided with a thread. The small diameter section of each upper positioning column is located in the connecting hole of the upper support plate, and a first fixing nut is screwed on the small diameter section. The top surface of the upper support plate abuts against the large diameter section, and the bottom surface abuts against the first fixing nut; the lower positioning column includes a large diameter section and a small diameter section, and the small diameter section is provided with a thread. The small diameter section of each lower positioning column is located in the connecting hole of the lower support plate, and a second fixing nut is screwed on the small diameter section. The top surface of the lower support plate abuts against the large diameter section, and the bottom surface abuts against the second fixing nut.

[0012] Furthermore, four lower positioning posts are provided and distributed in a rectangular shape on the lower support plate; four upper positioning posts are provided and distributed in a rectangular shape on the upper support plate.

[0013] Furthermore, a linear bearing is connected to the second positioning hole, the linear bearing is located on the bottom surface of the top plate, and the large diameter section of the lower positioning column is located in the linear bearing.

[0014] Furthermore, two of the first oil cylinder and two of the second oil cylinder are provided respectively, and the cylinder rods of the first oil cylinder are symmetrically arranged on the upper support plate, and the cylinder rods of the second oil cylinder are symmetrically arranged on the lower support plate.

[0015] Furthermore, the first through hole is arranged at the center position of the upper support plate, and the second through hole is arranged at the center position of the lower support plate.

[0016] Furthermore, the pressure head is connected to the bottom surface of the lower support plate by bolts, the conical sleeve is connected to the top surface of the upper support plate by bolts, and the base of the expansion sleeve is connected to the bottom surface of the top plate by bolts.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] (1) The utility model provides a bearing pressing device including a frame, a first oil cylinder and a second oil cylinder are arranged on the top plate of the frame, the cylinder rod of the first oil cylinder is connected to the upper support plate, the cylinder rod of the second oil cylinder is connected to the lower support plate, the upper support plate is located between the top plate and the lower support plate, and a plurality of upper positioning columns and lower positioning columns are respectively arranged on the upper support plate and the lower support plate, the positioning columns can ensure their accuracy when moving up and down, and ensure that the bearing can be uniformly stressed, a first through hole is opened on the upper support plate, a second through hole is opened on the lower support plate, a pressing head for pressing the bearing is arranged on the bottom surface of the lower support plate, the pressing head and the second through hole are arranged coaxially, and a third through hole is opened in the center of the pressing head, a conical sleeve is connected on the first through hole and located on the top surface of the upper support plate, and an expansion sleeve is connected on the bottom surface of the top plate The clamping claws of the expansion sleeve are all located in the tapered hole opened in the center of the tapered sleeve, and the tapered sleeve is coaxially arranged with the first through hole. In this way, the first through hole, the second through hole and the third through hole are all coaxial. When the bearing is pressed, the first oil cylinder and the second oil cylinder drive the upper support plate and the lower support plate to move downward together, and the movable shaft passes through the third through hole, the second through hole, and the first through hole in sequence and then enters the tapered hole. At this time, the first oil cylinder drives the tapered sleeve on the upper support plate to move upward, and the tapered hole of the tapered sleeve squeezes and contracts the clamping claws of the expansion sleeve, thereby clamping the movable shaft to achieve axial and radial positioning of the movable shaft. At this time, the outer ring of the bearing will not shake with the movable shaft, and then drive the second oil cylinder to drive the pressure head on the lower support plate to move downward, and the pressure head squeezes the bearing to press the bearing into the workpiece mounting hole. The whole process is simple and improves work efficiency.

[0019] (2) The utility model provides a bearing press-fitting device which adopts a positioning form of a tapered sleeve plus an expansion sleeve, which has a simple structure and is easy to use. When in use, it can ensure that the bearing will not be offset when entering the installation hole of the workpiece, thereby avoiding bearing damage and ensuring the installation quality.

[0020] (3) In a bearing pressing device provided by the utility model, a pressure head is connected to the bottom surface of a lower support plate by bolts, a conical sleeve is connected to the top surface of an upper support plate by bolts, and the expansion sleeve is connected to the bottom surface of a top plate by bolts. The upper positioning column and the lower positioning column are also fixed by a first fixing nut and a second fixing nut respectively screwed on their small diameter sections, and a threaded connection is adopted to facilitate the maintenance and replacement of each component. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a front view of an embodiment of the bearing press-fitting device of the utility model;

[0022] Figure 2 It is a three-dimensional structural schematic diagram of an embodiment of the utility model;

[0023] Figure 3 It is a schematic diagram of the cooperation of the tapered sleeve, the expansion sleeve and the movable shaft when the embodiment of the utility model is in use.

[0024] The following are the descriptions of the reference numerals:

[0025] 1-frame, 101-top plate; 2-upper support plate, 3-lower support plate, 4-upper positioning column, 5-lower positioning column, 6-first oil cylinder, 7-second oil cylinder, 8-pressure head, 9-tapered sleeve, 10-expansion sleeve, 1001-clamping jaw, 1002-base; 11-first fixing nut, 12-second fixing nut, 13-linear bearing, 14-movable shaft. DETAILED DESCRIPTION

[0026] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0027] Reference Figure 1-Figure 3 A bearing press-fitting device of the utility model includes a frame 1, and four oil cylinders are arranged on the top plate 101 of the frame 1, two of which are first oil cylinders 6, and the other two are second oil cylinders 7. The cylinder rods of the two first oil cylinders 6 pass through the top plate 101 and are connected to the upper support plate 2, and the two cylinder rods are symmetrically arranged; the cylinder rods of the two second oil cylinders 7 pass through the top plate 101 and are connected to the lower support plate 3, and the two cylinder rods are symmetrically arranged.

[0028] The upper support plate 2 is located between the top plate 101 and the lower support plate 3. Because the upper support plate 2 and the lower support plate 3 need to move up and down driven by the cylinder to complete the press-fitting of the bearings, the movement accuracy cannot be guaranteed by the cylinder rod alone. Therefore, four upper positioning columns 4 are arranged on the upper support plate 2. The four upper positioning columns 4 are distributed in a rectangular shape on the upper support plate 2, thereby ensuring the movement accuracy of the upper support plate 2. Four lower positioning columns 5 are also arranged on the lower support plate 3. The four lower positioning columns 5 are distributed in a rectangular shape on the upper support plate 3. The upper positioning column 4 and the lower positioning column 5 have the same structure, but are different in size. The upper positioning column 4 includes a large diameter section and a small diameter section, and a thread is arranged on the small diameter section. The large diameter section of each upper positioning column 4 is located in the first positioning hole opened on the top plate 101, and the small diameter section is located in the connecting hole opened on the upper support plate 2, and a first fixing nut 11 is screwed on the small diameter section. The top surface of the upper support plate 2 abuts against the large diameter section, and the bottom surface abuts against the first fixing nut 11; in this way, the upper positioning column 4 is connected to the upper support plate 2, and the two are connected together by the first fixing nut 11 connection, which is also convenient for replacement during maintenance. Because the lower support plate 3 needs to drive the pressure head 8 to press the bearing into the workpiece mounting hole, the movement accuracy requirement is higher. Therefore, a linear bearing 13 is connected to each second positioning hole. The linear bearing 13 is located on the bottom surface of the top plate 101, and the large diameter section of the lower positioning column 5 is located in the linear bearing 13. The small diameter section of the lower positioning column 5 is located in the connecting hole of the lower support plate 3, and the second fixing nut 12 is screwed on the small diameter section. The top surface of the lower support plate 3 abuts against the large diameter section, and the bottom surface abuts against the second fixing nut 12.

[0029] A first through hole is opened at the center position of the upper support plate 2, and a second through hole is opened at a position corresponding to the second through hole on the lower support plate 3. The second through hole is also located at the center position of the lower support plate 3. A pressing head 8 is connected by bolts on the second through hole and located at the bottom surface of the lower support plate 3. The pressing head 8 is coaxially arranged with the second through hole, and a third through hole is opened at the center of the pressing head 8. The pressing head 8 is used to press the bearing into the mounting hole of the workpiece during assembly. A conical sleeve 9 is connected by bolts on the first through hole and located on the top surface of the upper support plate 2. The conical sleeve 9 is coaxially arranged with the first through hole. An expansion sleeve 10 is connected to the bottom surface of the top plate 101. The expansion sleeve 10 includes a base 1002 connected to the bottom surface of the top plate 101 by bolts and a plurality of clamping jaws 1001 arranged on the base 1002 and evenly distributed along the circumference, and the plurality of clamping jaws 1001 are all located in the conical hole opened in the center of the conical sleeve 9, and the small end of the conical hole faces the lower support plate 3, so that when the movable shaft 14 passes through the third through hole, the second through hole, and the first through hole in sequence, it will enter the conical hole. When the first oil cylinder 6 drives the conical sleeve 9 to move upward, the conical hole of the conical sleeve 9 squeezes and contracts the clamping jaws 1001, thereby clamping the movable shaft 14, realizing axial and radial positioning of the movable shaft 14, and the overall structure is simple.

[0030] When in use, the first oil cylinder 6 and the second oil cylinder 7 respectively drive the upper support plate 2 and the lower support plate 3 to move downward. At this time, the bearing sleeve is arranged on the movable shaft 14 and is in an unpositioned state. When the upper support plate 2 and the lower support plate 3 move downward, the movable shaft 14 passes through the third through hole, the second through hole, and the first through hole in sequence and enters the tapered hole. When the movable shaft 14 enters the tapered hole, the upper support plate 2 and the lower support plate 3 stop moving. At this time, the first oil cylinder 6 is started to drive the tapered sleeve 9 to move upward. During the upward movement, the tapered hole of the tapered sleeve 9 squeezes and contracts the clamping jaws 1001 of the expansion sleeve 10, and then the movable shaft 14 is clamped by the cooperation of the clamping jaws 1001 and the tapered hole, so as to realize axial and radial positioning of the movable shaft 14. At this time, the second oil cylinder 7 is started to drive the pressure head 8 to move downward to press the bearing into the workpiece mounting hole.

[0031] The embodiments described above are merely descriptions of the specific implementation methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A bearing press-fitting device, characterized in that: It comprises a frame (1), an upper support plate (2), a lower support plate (3) and an oil cylinder; The lower support plate (3) is provided with a plurality of lower positioning columns (5), each of which is located in a second positioning hole opened on the top plate (101) of the frame (1); the upper support plate (2) is located between the lower support plate (3) and the top plate (101) of the frame (1); the upper support plate (2) is provided with a plurality of upper positioning columns (4), each of which is located in a first positioning hole opened on the top plate (101) of the frame (1); The oil cylinder comprises a first oil cylinder (6) and a second oil cylinder (7), both of which are mounted on a top plate (101) of the frame (1), and the oil cylinder rod of the first oil cylinder (6) passes through the top plate (101) to be connected to the upper support plate (2), and the oil cylinder rod of the second oil cylinder (7) passes through the top plate (101) to be connected to the lower support plate (3); The upper support plate (2) is provided with a first through hole, a conical sleeve (9) is connected to the first through hole and located at the top surface of the upper support plate (2), the conical sleeve (9) is coaxially arranged with the first through hole, an expansion sleeve (10) is connected to the bottom surface of the top plate (101), the expansion sleeve (10) comprises a base (1002) connected to the bottom surface of the top plate (101) and a plurality of clamping jaws (1001) arranged on the base (1002) and evenly distributed along the circumference, the plurality of clamping jaws (1001) are all located in a conical hole opened in the center of the conical sleeve (9), and the small end of the conical hole faces the lower support plate (3); A second through hole is provided on the lower support plate (3) corresponding to the first through hole, a pressing head (8) for pressing the bearing is connected to the second through hole and located on the bottom surface of the lower support plate (3), the pressing head (8) is coaxially arranged with the second through hole, and a third through hole is provided at the center of the pressing head (8).

2. The bearing press-fitting device according to claim 1, characterized in that: The upper positioning column (4) comprises a large diameter section and a small diameter section, and the small diameter section is provided with a thread. The large diameter section of each upper positioning column (4) is located in the first positioning hole, and the small diameter section is located in the connecting hole of the upper support plate (2). A first fixing nut (11) is screwed onto the small diameter section, and the top surface of the upper support plate (2) abuts against the large diameter section, and the bottom surface abuts against the first fixing nut (11); the lower positioning column (5) comprises a large diameter section and a small diameter section, and the small diameter section is provided with a thread. The large diameter section of each lower positioning column (5) is located in the second positioning hole, and the small diameter section is located in the connecting hole of the lower support plate (3). A second fixing nut (12) is screwed onto the small diameter section, and the top surface of the lower support plate (3) abuts against the large diameter section, and the bottom surface abuts against the second fixing nut (12).

3. The bearing press-fitting device according to claim 2, characterized in that: Four lower positioning columns (5) are provided and distributed in a rectangular shape on the lower support plate (3); four upper positioning columns (4) are provided and distributed in a rectangular shape on the upper support plate (2).

4. The bearing press-fitting device according to claim 2 or 3, characterized in that: A linear bearing (13) is connected to the second positioning hole. The linear bearing (13) is located on the bottom surface of the top plate (101), and the large diameter section of the lower positioning column (5) is located inside the linear bearing (13).

5. The bearing press-fitting device according to claim 4, characterized in that: The first oil cylinder (6) and the second oil cylinder (7) are respectively provided with two, and the oil cylinder rod of the first oil cylinder (6) is symmetrically arranged on the upper support plate (2), and the oil cylinder rod of the second oil cylinder (7) is symmetrically arranged on the lower support plate (3).

6. The bearing press-fitting device according to claim 5, characterized in that: The first through hole is arranged at the center position of the upper support plate (2), and the second through hole is arranged at the center position of the lower support plate (3).

7. The bearing press-fitting device according to claim 6, characterized in that: The pressure head (8) is connected to the bottom surface of the lower support plate (3) by bolts, the conical sleeve (9) is connected to the top surface of the upper support plate (2) by bolts, and the base (1002) of the expansion sleeve (10) is connected to the bottom surface of the top plate (101) by bolts.

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