Disassembling and assembling tool for bearing with widened inner ring

Abstract

The utility model provides a dismounting tool for a bearing with a widened inner ring, which can solve the problems that potential safety hazards exist due to lack of tools when the bearing is dismounted, the bearing is damaged in the dismounting process, the bearing is scrapped, and unnecessary maintenance cost is increased. The tool comprises a pressure piston, a support and a long-neck bolt, a boss is arranged on the outer side of one end of the support, an annular plate is arranged on the inner side of one end of the support, a piston cylinder is arranged on the annular plate, the pressure piston is installed in a piston cavity formed by the annular plate, the piston cylinder and the support and is in sliding sealing fit with the piston cavity, and one end of the support is used for being connected with an inner ring when a bearing is installed. The boss abuts against the end face of the inner ring, the other end of the boss is used for being detachably connected with the inner ring when the bearing is disassembled, the long-neck bolt is used for penetrating through the pressure piston to be externally connected with a transmission shaft when the bearing is installed, and an oil inlet and outlet is formed in the support and used for supplying oil to an oil storage cavity formed by the annular plate, the piston cylinder, the support and the pressure piston to store pressure. And the inner ring is assembled and disassembled on the transmission shaft by driving the support.

Description

Technical Field

[0001] The utility model relates to a tool, in particular to a disassembly and assembly tool for a bearing with a widened inner ring. Background Art

[0002] Rolling bearings are very common components in gearboxes, which play a role in reducing friction resistance and guiding. The inner ring is generally connected to the shaft-type active parts with an interference fit, and the outer ring is connected to the housing-type fixed parts with a transition fit. The cage in the rolling bearing mainly plays a guiding role, ensuring that the rolling elements inside the bearing roll in a preset manner. The structure is light and simple, and can hardly bear the load. Therefore, during the daily maintenance of the gearbox, the inner ring, outer ring and rolling elements in the bearing are not easy to be damaged, while the cage becomes a vulnerable part during the disassembly and assembly of the bearing. Once damaged, the bearing will be scrapped, causing unnecessary losses. Figure 1 The present invention is a schematic diagram of the installation of the inner ring widened bearing of the output shaft of an existing gearbox and the transmission shaft, wherein the outer ring 10 of the bearing 1 is transitionally fitted with the gearbox housing 2, and the inner ring 11 of the bearing 1 is interference fit with the transmission shaft 3. Under this installation condition, there is no space on the left side of the bearing for its disassembly and assembly, and it can only be disassembled from the right side of the bearing. During the disassembly process, after removing the nut pressed on the outside of the bearing 1, there is no tooling to disassemble the bearing. Usually, the only way is to continuously knock the transmission shaft to the left to make the transmission shaft move continuously to the left and finally separate from the bearing. The entire disassembly process is rough and dangerous, and the impact transmitted to the bearing 1 is large. It is possible that the raceway of the bearing 1 is damaged and the retainer is deformed, which may cause the bearing to be damaged and a new bearing needs to be replaced, increasing unnecessary maintenance costs. Utility Model Content

[0003] The utility model aims to solve the technical problems that, when the bearings installed on the output shaft of the gearbox are disassembled, there are potential safety hazards due to the lack of tooling, and the bearings may be damaged during the disassembly process, resulting in the scrapping of the bearings and increasing unnecessary maintenance costs, and to provide a disassembly and assembly tool for a bearing with a widened inner ring.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A disassembly and assembly tool for a bearing with a widened inner ring, which is special in that:

[0006] It includes a pressure piston, a hollow cylindrical support and a long-necked bolt; a boss is circumferentially arranged on the outer side of one end of the support, and a circular ring plate is arranged on the inner side of the support; a piston cylinder facing the other end of the support is axially arranged on the circular ring plate, and the circular ring plate, the piston cylinder and the support together constitute a piston cavity; the pressure piston is installed in the piston cavity and cooperates with the piston cavity in a sliding seal; the circular ring plate, the piston cylinder, the support and the pressure piston together constitute an oil storage cavity;

[0007] One end of the support is used to connect with the inner ring of the bearing when installing the bearing, and the boss is used to abut against the end face of the inner ring; the other end of the support is used to be detachably connected with the inner ring when disassembling the bearing; the long neck bolt is used to pass through the pressure piston and connect to the external transmission shaft when installing the bearing;

[0008] The support is provided with an oil inlet and outlet of an external oil supply device, and the oil inlet and outlet are used to supply oil to the oil storage chamber to store pressure, and the inner ring is pressed onto the transmission shaft or detached from the transmission shaft by driving the support.

[0009] Furthermore, the other end of the support is connected with a connecting piece, and the connecting piece is detachably connected to the inner ring when the bearing is disassembled.

[0010] Further, at least one first sealing groove is provided on the outer side of the piston cylinder, and a first sealing ring is provided in the first sealing groove; at least one second sealing groove is provided on the outer side of the pressure piston, and a second sealing ring is provided in the second sealing groove;

[0011] The pressure piston is provided with a stepped hole, and a limiting surface is formed between the small-diameter hole and the large-diameter hole of the stepped hole; the screw of the long-necked bolt passes through the large-diameter hole and the small-diameter hole in sequence and is connected to the external transmission shaft, and the screw head is located in the large-diameter hole.

[0012] Furthermore, the number of the first sealing grooves is two; the number of the second sealing grooves is three.

[0013] Furthermore, the other end of the support is threadedly connected to the connecting piece; and the connecting piece is threadedly connected to the inner ring when the bearing is disassembled.

[0014] Furthermore, the support, boss, annular plate and piston cylinder are an integrated structure; the pressure piston, support, annular plate and piston cylinder are coaxially arranged.

[0015] Beneficial effects of the utility model:

[0016] 1. The utility model provides a disassembly and assembly tool for a bearing with a widened inner ring. The tool is detachably connected to the inner ring of the bearing, so that the bearing can be installed and disassembled, avoiding safety hazards during the disassembly and assembly of the bearing, preventing the bearing from being subjected to impact loads, effectively protecting the bearing, and helping to reduce maintenance costs.

[0017] 2. The connecting piece in the utility model is respectively connected with the support and the inner ring thread of the bearing, and can be replaced according to the size of the inner thread of different inner ring widened bearings to be suitable for the disassembly and assembly of different inner ring widened bearings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the installation of the inner ring widened bearing of the output shaft of an existing gearbox and the transmission shaft;

[0019] Figure 2 It is a cross-sectional view of an embodiment of a disassembly and assembly tool for a bearing with a widened inner ring according to the utility model;

[0020] Figure 3 It is a 1 / 4 cutaway isometric view of an embodiment of the utility model (long neck bolt is not shown);

[0021] Figure 4 This is a schematic diagram of the initial state when the inner ring widened bearing is installed using the embodiment of the utility model;

[0022] Figure 5 It is a schematic diagram of the initial state when the inner ring widened bearing is disassembled by using the embodiment of the utility model.

[0023] Description of reference numerals:

[0024] 1-bearing, 10-outer ring, 11-inner ring, 2-gearbox housing, 3-drive shaft, 4-pressure piston, 40-step hole, 41-limiting surface, 5-support, 50-boss, 51-circular ring plate, 52-piston cylinder, 53-oil inlet and outlet, 6-long neck bolt, 7-piston chamber, 8-oil storage chamber, 9-connecting piece, 13-first sealing ring, 15-second sealing ring. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] like Figure 2-Figure 3 As shown, a disassembly and assembly tool for a bearing with a widened inner ring includes a pressure piston 4, a hollow cylindrical support 5, and a long-neck bolt 6. Specifically, a boss 50 is provided on the outer side of one end of the support 5 along the circumferential direction, and the other end of the support 5 is threadedly connected to a connecting piece 9. A circular ring plate 51 is provided on the inner side of the support 5, and a piston cylinder 52 is provided on the circular ring plate 51 along the axial direction toward the other end of the support 5. Two first sealing grooves are provided on the outer side of the piston cylinder 52, and a first sealing ring 13 is provided in the first sealing groove. The circular ring plate 51, the piston cylinder 52 and the support 5 together constitute a piston chamber 7. Three second sealing grooves are provided on the outer side of the pressure piston 4, and a second sealing ring 15 is provided in the second sealing groove. A step hole 40 is provided on the pressure piston 4, and a limiting surface 41 is formed between the small-diameter hole and the large-diameter hole of the step hole 40. The pressure piston 4 is installed in the piston chamber 7 and cooperates with the piston chamber 7 in a sliding seal. The circular ring plate 51, the piston cylinder 52, the support 5 and the pressure piston 4 together constitute an oil storage chamber 8.

[0027] like Figure 4-Figure 5 As shown, one end of the support 5 is used to connect with the inner ring 11 of the bearing 1 when the bearing 1 is installed, the boss 50 is used to abut against the end face of the inner ring 11, and the screw of the long neck bolt 6 is used to pass through the large diameter hole and the small diameter hole of the step hole 40 in sequence and be threadedly connected with the external transmission shaft 3 when the bearing 1 is installed, and its screw head is located in the large diameter hole. The connecting piece 9 is used to be threadedly connected with the inner ring 11 when the bearing 1 is disassembled. The support 5 is also provided with an oil inlet and outlet 53 of an external oil supply device, and the oil inlet and outlet 53 is used to supply oil to the oil storage chamber 8 to store pressure, and the inner ring 11 is pressed onto the transmission shaft 3 or separated from the transmission shaft 3 by driving the support 5. In this embodiment, the support 5, the boss 50, the annular plate 51 and the piston cylinder 52 are an integrated structure, and the pressure piston 4, the support 5, the annular plate 51 and the piston cylinder 52 are coaxially arranged.

[0028] The principle of installing the bearing using the above-mentioned disassembly and assembly tooling for the bearing with widened inner ring is as follows:

[0029] like Figure 4 The figure shows the initial state when the inner ring widened bearing is installed using the utility model. At this time, one end of the support 5 is connected to the inner ring 11, the boss 50 is in contact with the end face of the inner ring 11, and the screw of the long-necked bolt 6 passes through the large-diameter hole and the small-diameter hole of the step hole 40 in sequence and is threadedly connected to the external transmission shaft 3, and its screw head is located in the large-diameter hole. When the external oil supply device (manual or automatic) starts to discharge oil, the oil enters the oil storage chamber 8 through the oil inlet and outlet 53. When the oil pressure is accumulated, it starts to push the pressure piston 4 to move to the right until the limit surface 41 is in contact with the left end face of the screw head of the long-necked bolt 6. At this time, the pressure piston 4 no longer moves. Under the action of pressure, the support 5 starts to make relative movement and moves to the left, thereby driving the inner ring 11 of the bearing 1 to move to the left, and finally the inner ring 11 is pressed onto the transmission shaft 3.

[0030] The principle of disassembling the bearing using the above-mentioned disassembly and assembly tool for the inner ring widened bearing is as follows:

[0031] like Figure 5 As shown, it is the initial state when the utility model is used to dismantle the inner ring widened bearing. At this time, the long neck bolt 6 is not needed, and the connecting piece 9 is threadedly connected to the inner ring 11. When the external oil supply device (manual or automatic) starts to discharge oil, the oil enters the oil storage chamber 8 through the oil inlet and outlet 53. When the oil pressure is accumulated, it starts to push the pressure piston 4 to move to the left until its left end face abuts against the right end face of the transmission shaft 3. At this time, the pressure piston 4 no longer moves. Under the action of pressure, the support 5 starts to make relative movement and moves to the right side, thereby driving the connecting piece 9 and the inner ring 11 of the bearing 1 to move to the right, and finally the inner ring 11 is detached from the transmission shaft 3. At this time, the local space becomes sufficient, and the outer ring 10 of the bearing 1 can be easily taken out with a right-angle hook.

[0032] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or replacements within the technical scope disclosed in the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A disassembly and assembly tool for a bearing with a widened inner ring, characterized in that: The invention comprises a pressure piston (4), a hollow columnar support (5) and a long-necked bolt (6); a boss (50) is circumferentially arranged on the outer side of one end of the support (5), and a circular ring plate (51) is arranged on the inner side of the support (5); a piston cylinder (52) is axially arranged on the circular ring plate (51) and faces the other end of the support (5); the circular ring plate (51), the piston cylinder (52) and the support (5) together constitute a piston chamber (7); the pressure piston (4) is installed in the piston chamber (7) and is in sliding sealing cooperation with the piston chamber (7); the circular ring plate (51), the piston cylinder (52), the support (5) and the pressure piston (4) together constitute an oil storage chamber (8); One end of the support (5) is used to be connected to the inner ring (11) of the bearing (1) when the bearing (1) is installed, and the boss (50) is used to abut against the end surface of the inner ring (11); the other end of the support (5) is used to be detachably connected to the inner ring (11) when the bearing (1) is disassembled; The long neck bolt (6) is used to pass through the pressure piston (4) and externally connect the transmission shaft (3) when installing the bearing (1); The support (5) is provided with an oil inlet and outlet (53) of an external oil supply device, and the oil inlet and outlet (53) are used to supply oil to the oil storage chamber (8) to store pressure, and the inner ring (11) is pressed onto the transmission shaft (3) or detached from the transmission shaft (3) by driving the support (5).

2. The disassembly and assembly tool for the inner ring widened bearing according to claim 1, characterized in that: The other end of the support (5) is connected to a connecting piece (9), and the connecting piece (9) is detachably connected to the inner ring (11) when the bearing (1) is disassembled.

3. The disassembly and assembly tool for the inner ring widened bearing according to claim 2, characterized in that: The outer side of the piston cylinder (52) is provided with at least one first sealing groove, in which a first sealing ring (13) is arranged; the outer side of the pressure piston (4) is provided with at least one second sealing groove, in which a second sealing ring (15) is arranged; The pressure piston (4) is provided with a stepped hole (40), and a limiting surface (41) is formed between the small diameter hole and the large diameter hole of the stepped hole (40); the screw rod of the long neck bolt (6) passes through the large diameter hole and the small diameter hole in sequence and is connected to the external transmission shaft (3), and the screw head is located in the large diameter hole.

4. The disassembly and assembly tool for the inner ring widened bearing according to claim 3, characterized in that: The number of the first sealing grooves is two; the number of the second sealing grooves is three.

5. A disassembly and assembly tool for a bearing with a widened inner ring according to claim 2, 3 or 4, characterized in that: The other end of the support (5) is threadedly connected to the connecting piece (9); and the connecting piece (9) is threadedly connected to the inner ring (11) when the bearing (1) is disassembled.

6. The disassembly and assembly tool for the inner ring widened bearing according to claim 5, characterized in that: The support (5), the boss (50), the annular plate (51) and the piston cylinder (52) are an integrated structure; the pressure piston (4), the support (5), the annular plate (51) and the piston cylinder (52) are coaxially arranged.

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