Bearing dismounting tool suitable for rear end of precise main shaft

Abstract

The utility model provides a bearing dismounting tool suitable for the rear end of a precision main shaft, which relates to the technical field of machine tool precision main shaft manufacturing and comprises a dismounting sleeve, a connecting disc, an oil cylinder and a rear end cushion block. The dismounting sleeve is of a split type structure. One end of the connecting disc is in threaded connection with the thread locking hole of the dismounting sleeve, and the other end of the connecting disc is in threaded connection with the cylinder body of the oil cylinder; the oil cylinder comprises a cylinder body and a piston rod; the piston rod is in threaded connection with the rear-end cushion block; the end face of the rear end cushion block is used for being in limiting fit with the end face of the shaft core. After the dismounting sleeves are combined, the inner side end face is used for abutting against the end face of a bearing backing ring; the split type dismounting sleeve can flexibly pass through a narrow gap and is matched with an oil cylinder for stable pushing after being combined, precise dismounting of the bearing without damage such as extrusion and scraping in the limited space is achieved, the original precision of the bearing is well reserved, the scrap cost is reduced, the reliability of equipment is improved, and the service life of the equipment is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of precision spindle manufacturing technology for machine tools, and in particular to a bearing disassembly tool suitable for the rear end of a precision spindle. Background Technology

[0002] During the disassembly of the rear bearing of a precision spindle, traditional equipment such as pullers face the problem of limited space in the rear section. This limitation usually results in the puller hook angle being too large, making it impossible to pull the bearing out smoothly, or the mutual interference between the spindle structure and the puller body makes the disassembly operation complicated and difficult to complete.

[0003] Specifically, existing disassembly tools are often not designed to fully consider the specific space constraints of the rear bearing, resulting in certain defects in practical applications. Traditional tools such as pullers, due to their fixed structure, cannot flexibly adapt to complex space requirements, which often leads to contradictions between the tool and the space structure when disassembling the bearing at the rear of the spindle. This urgently requires the development of an innovative disassembly tool that can adapt to different complex space environments to the greatest extent while maintaining efficient disassembly, thereby improving the accuracy and convenience of disassembly work.

[0004] Therefore, we propose a bearing removal tool suitable for the rear end of a precision spindle. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of existing technologies and propose a bearing disassembly tool that is suitable for disassembling the rear bearing of a precision spindle in a space-constrained environment, enabling non-destructive and efficient disassembly operations.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A bearing removal tool for the rear end of a precision spindle, comprising: a removal sleeve, a connecting disc, a hydraulic cylinder, and a rear end pad;

[0008] The disassembly sleeve has a split structure. Its first end is provided with a threaded locking hole, and its second end is provided with a clearance notch. After the split parts are combined, the clearance notch forms a channel that does not interfere with the outer ring of the bearing.

[0009] One end of the connecting plate is threadedly connected to the threaded locking hole of the disassembly sleeve, and the other end is threadedly connected to the cylinder body of the oil cylinder.

[0010] The hydraulic cylinder includes a cylinder body and a piston rod. The piston rod is threadedly connected to the rear end pad, and the piston rod stroke is greater than the length of the interference fit section between the bearing and the shaft core. The end face of the rear end pad is used for limiting fit with the end face of the shaft core, and its outer circle is clearance fit with the inner hole of the shaft core.

[0011] The inner end face of the disassembly sleeve after merging is used to abut against the end face of the bearing washer ring. The inner hole of the bearing washer ring is clearance-fitted with the shaft core and only contacts the end face of the bearing inner ring.

[0012] Furthermore, the split structure of the disassembly sleeve can be achieved through the gap between the bearing and the main shaft body.

[0013] Furthermore, the piston rod of the hydraulic cylinder exerts force in a direction parallel to the axis of the shaft core, thereby pushing the disassembly sleeve and bearing gasket ring to move axially.

[0014] Furthermore, the piston rod of the hydraulic cylinder pushes the rear end pad, thereby causing the disassembly sleeve and bearing washer ring to move axially, and the bearing is removed from the shaft core.

[0015] Furthermore, the rear end pad and the end face of the shaft core are in planar contact to prevent axial relative movement.

[0016] Furthermore, the bearing is sleeved on the shaft core, and the inner ring of the bearing is supported by a bearing washer ring sleeved on the shaft core. The shaft core is installed in the main shaft body.

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

[0018] 1. Non-destructive disassembly of bearings under limited rear space conditions, ensuring bearing precision: The split disassembly sleeve can flexibly pass through narrow gaps. After being combined, it works with the hydraulic cylinder to push smoothly, achieving precise disassembly of the bearing in a limited space without squeezing, scratching or other damage, preserving the original precision of the bearing, reducing scrap costs, and improving equipment reliability and lifespan;

[0019] Traditional tools often damage bearings due to space constraints, while this tool is cleverly designed to avoid interference and ensure non-destructive disassembly, providing a guarantee for subsequent use or testing.

[0020] 2. The process is more convenient and easier to use than the traditional method: assembly is simple, requiring only threaded connections between the parts; disassembly can be easily completed by controlling the piston rod of the hydraulic cylinder to push it out, allowing for single-person operation, a simple process, and saving manpower and time;

[0021] Traditional methods are cumbersome and time-consuming, requiring multiple people to cooperate and frequent adjustments. This tool, however, is highly integrated, stable, and efficient, reducing errors and delays and bringing great convenience to users. Attached Figure Description

[0022] Figure 1 This utility model provides an overall structural schematic diagram of a bearing disassembly tool suitable for the rear end of a precision spindle.

[0023] Legend: 1. Main spindle body;

[0024] 2. Bearings;

[0025] 3. Disassemble the sleeve; 31. Threaded locking hole; 32. Clearance notch;

[0026] 4. Connecting disk;

[0027] 5. Hydraulic cylinder;

[0028] 6. Rear end pad;

[0029] 7. Shaft core;

[0030] 8. Bearing gaskets. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0032] To facilitate understanding of this utility model, a more comprehensive description of this utility model will be provided below with reference to relevant embodiments, and several embodiments of this utility model will be given. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of this utility model more thorough and complete.

[0033] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0035] like Figure 1 As shown, this utility model provides a technical solution: a bearing disassembly tool suitable for the rear end of a precision spindle, which is used in conjunction with the precision spindle structure;

[0036] The precision spindle structure includes: spindle body 1, bearing 2, shaft core 7 and bearing washer 8;

[0037] Specifically, the bearing 2 is mounted on the shaft core 7, and the inner ring of the bearing 2 abuts against the bearing washer ring 8 mounted on the shaft core 7. The shaft core 7 is installed inside the main shaft body 1.

[0038] The bearing removal tool for the rear end of a precision spindle in this embodiment includes: a removal sleeve 3, a connecting plate 4, a hydraulic cylinder 5, and a rear end pad 6;

[0039] The disassembly sleeve 3 has a split structure, which allows the disassembly sleeve 3 to pass smoothly through the narrow gap between the bearing 2 and the main shaft body 1. Its first end is provided with a threaded locking hole 31 for threaded connection with the connecting plate 4, and the second end is provided with a clearance notch 32. After the split parts are combined, the clearance notch 32 forms a channel that does not interfere with the outer ring of the bearing 2, thus avoiding damage to the outer ring of the bearing 2 during disassembly.

[0040] One end of the connecting plate 4 is threaded to the threaded locking hole 31 of the disassembly sleeve 3, and the other end is threaded to the cylinder body of the hydraulic cylinder 5. The connecting plate 4 realizes a reliable connection between the disassembly sleeve 3 and the hydraulic cylinder 5, so that the hydraulic cylinder 5 can effectively transmit power to the disassembly sleeve 3.

[0041] The hydraulic cylinder 5 includes a cylinder body and a piston rod. The piston rod is threadedly connected to the rear end pad 6, and the piston rod stroke is greater than the length of the interference fit section between the bearing 2 and the shaft core 7. The end face of the rear end pad 6 is used to limit the fit with the end face of the shaft core 7, and its outer circle is clearance fit with the inner hole of the shaft core 7.

[0042] After disassembly, the inner end face of the sleeve 3 is used to abut against the end face of the bearing washer ring 8. The inner hole of the bearing washer ring 8 is clearance-fitted with the shaft core 7 and only contacts the end face of the inner ring of the bearing 2.

[0043] The disassembly of the sleeve 3 can be achieved through the gap between the bearing 2 and the spindle body 1.

[0044] The piston rod of the hydraulic cylinder 5 exerts force in a direction parallel to the axis of the shaft core 7, pushing the disassembly sleeve 3 and bearing washer 8 to move axially.

[0045] The piston rod of the hydraulic cylinder 5 pushes the rear end pad 6, which in turn drives the disassembly sleeve 3 and bearing washer 8 to move axially, thereby removing the bearing 2 from the shaft core 7.

[0046] The end face limiting fit between the rear end pad 6 and the shaft core 7 is a planar contact, which prevents axial relative movement.

[0047] The working process of this utility model:

[0048] 1) Tighten the cylinder body of the hydraulic cylinder 5 to the threaded connection end face of the connecting plate 4, and tighten the piston rod of the hydraulic cylinder 5 to the threaded connection end face of the rear pad block 6;

[0049] 2) After the disassembly sleeve 3 is separated and passed through the gap between the main shaft body 1 and the bearing, the inner end face of the disassembly sleeve 3 abuts against the end face of the bearing washer ring 8, and then the disassembly sleeve 3 is put back together.

[0050] 3) Fit the rear end pad 6 to the outer circle of the inner hole of the shaft core 7 until the end face is limited, such as... Figure 1 As shown;

[0051] 4) Tighten the assembled disassembly sleeve 3 to the connecting disc 4 with threaded connections;

[0052] 5) Fill the cylinder body of the hydraulic cylinder 5 with oil to push out the piston rod. Since the rear end pad 6 and the end face of the shaft core 7 are limited and the shaft core 7 is fixed, the cylinder body of the hydraulic cylinder 5 drives the connecting plate 4 and the disassembly sleeve 3 to move relative to the shaft core 7.

[0053] 6) The inner end face of the disassembly sleeve 3 abuts against one end face of the bearing washer 8, and the other end face of the bearing washer 8 abuts against the inner ring of the bearing 2. Finally, the piston of the oil cylinder 5 pushes out to drive the disassembly sleeve 3, connecting plate 4, bearing washer 8, and bearing 2, so that the bearing 2 is separated from the interference fit section of the shaft core 7, and the disassembly is successfully completed without damage.

[0054] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A bearing disassembly tool suitable for the rear end of a precision spindle, characterized in that, include: Disassemble the sleeve (3), connecting plate (4), hydraulic cylinder (5) and rear end pad (6); The disassembly sleeve (3) is a split structure. Its first end is provided with a threaded locking hole (31), and its second end is provided with a clearance notch (32). After the split parts are combined, the clearance notch (32) forms a channel that does not interfere with the outer ring of the bearing (2). One end of the connecting plate (4) is threadedly connected to the threaded locking hole (31) of the disassembly sleeve (3), and the other end is threadedly connected to the cylinder body of the oil cylinder (5). The cylinder (5) includes a cylinder body and a piston rod. The piston rod is threadedly connected to the rear end pad (6), and the piston rod stroke is greater than the length of the interference fit section between the bearing (2) and the shaft (7). The end face of the rear end pad (6) is used to limit the fit with the end face of the shaft core (7), and its outer circle is in clearance fit with the inner hole of the shaft core (7); The inner end face of the disassembly sleeve (3) after being combined is used to abut against the end face of the bearing washer (8). The inner hole of the bearing washer (8) is clearance-fitted with the shaft core (7) and only contacts the end face of the inner ring of the bearing (2).

2. The bearing disassembly tool according to claim 1, characterized in that: The split structure of the disassembly sleeve (3) can be achieved through the gap between the bearing (2) and the main shaft body (1).

3. The bearing disassembly tool according to claim 1, characterized in that: The piston rod of the oil cylinder (5) exerts force in a direction parallel to the axis of the shaft core (7), pushing the disassembly sleeve (3) and bearing washer (8) to move axially.

4. The bearing disassembly tool according to claim 3, characterized in that: The piston rod of the cylinder (5) pushes the rear end pad (6), thereby causing the disassembly sleeve (3) and bearing washer (8) to move axially, and the bearing (2) is removed from the shaft core (7).

5. The bearing disassembly tool according to claim 1, characterized in that: The end face limiting fit between the rear end pad (6) and the shaft core (7) is a planar contact, preventing axial relative movement.

6. The bearing disassembly tool according to claim 1, characterized in that: The bearing (2) is sleeved on the shaft core (7), and the inner ring of the bearing (2) is supported by a bearing washer (8) sleeved on the shaft core (7). The shaft core (7) is installed inside the main shaft body (1).

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