Main shaft dismounting system

Abstract

The invention provides a spindle dismounting system which comprises a cylinder body, a double-end guide piston, a bearing fixing device and a spindle ejection piston unit, the cylinder body is formed by connecting a cylinder sleeve and a fixing end cover, the double-end guide piston comprises a piston body and a stabilizing tail rod, the stabilizing tail rod is connected with the piston body, the piston body is arranged in the cylinder sleeve, and the bearing fixing device is arranged in the cylinder sleeve. The piston main body extends out of the lower end of the cylinder sleeve; the stabilizing tail rod upwards penetrates through a central opening of the fixed end cover; a cavity is formed in the lower end of the double-end guide piston, a fixing disc is installed at the lower end of the double-end guide piston, the main shaft ejection piston unit comprises a sub-piston and a piston rod, the sub-piston is arranged in the cavity of the double-end guide piston to do piston motion, the piston rod is fixedly connected with the sub-piston, and the piston rod downwards penetrates through a center opening of the fixing disc to do telescopic motion. The problems that in the prior art, a main shaft is fixedly connected with an inner ring of a bearing, the main shaft is difficult to disassemble through manual hammering, and the bearing is damaged due to impact generated by manual hammering are solved.

Description

A spindle disassembly system Technical Field

[0001] This invention relates to the field of disassembly equipment technology, and in particular to a spindle disassembly system. Background Technology

[0002] Bearings are widely used in engineering machinery and machine tools, with the spindle passing through the inner ring of the bearing. The spindle and the inner ring of the bearing are fixedly connected, and the connection between the spindle and the inner ring of the bearing is usually very tight, sometimes even using an interference fit, making it difficult to remove the spindle from the bearing later. After prolonged operation, some spindles and bearings may rust and corrode, making it even more difficult to remove the spindle from the inner ring of the bearing. Currently, the most common method of disassembly is to manually use a hammer to hammer the spindle at the center of the bearing to remove it from the bearing. Manually hammering the spindle is time-consuming and labor-intensive, making disassembly difficult, or even impossible. Hammering the spindle also impacts the bearing, causing damage. Summary of the Invention

[0003] The technical problem to be solved by the embodiments of the present invention is to provide a spindle disassembly system, which solves the problems of the existing technology where the spindle and the inner ring of the bearing are fixedly connected, making it difficult to disassemble the spindle by manually hammering, and causing damage to the bearing due to the impact of manual hammering.

[0004] To address the aforementioned technical problems, this invention provides a spindle disassembly system, comprising: a cylinder body, a double-ended guide piston, a bearing fixing device, and a spindle ejection piston unit. The cylinder body is formed by connecting a cylinder sleeve and a fixed end cover. The fixed end cover is sealed and connected to the upper end of the cylinder sleeve. The double-ended guide piston includes a piston body and a stabilizing tail rod. The stabilizing tail rod is connected to the piston body. The piston body performs piston movement within the cylinder sleeve and extends from the lower end of the cylinder sleeve. The stabilizing tail rod passes upward through the central opening of the fixed end cover and slides and seals with the central opening. The lower end of the double-ended guide piston is provided with a chamber, and the lower end of the double-ended guide piston is provided with a fixed plate. The main shaft ejector piston unit includes a sub-piston and a piston rod. The sub-piston is disposed in the chamber of the double-ended guide piston and performs piston movement. The piston rod is fixedly connected to the sub-piston. The piston rod extends downward through the central opening of the fixed plate and performs telescopic movement. The piston rod extends out and abuts against the main shaft. The circumference of the fixed plate includes several connecting seats. Bearing fixing devices are fixedly installed on the connecting seats. The bearing fixing devices fix the bearing to the lower end of the double-ended guide piston.

[0005] The bearing fixing device includes a first fixing plate and a second fixing plate. The first fixing plate is fixed on the connecting seat. The first fixing plate and the second fixing plate are connected to clamp and fix the bearing. The inner ring of the bearing is mounted on the spindle. The central opening of the first fixing plate is correspondingly set with the piston rod. The piston rod extends through the central opening of the first fixing plate and abuts against the spindle.

[0006] The bearing fixing device includes a first fixing plate, two second fixing plates, two third fixing plates, and a plurality of first bolts, first nuts, second bolts, and second nuts. The second fixing plates are connected to the first fixing plates via the first bolts and first nuts, and the first and second fixing plates clamp and fix the bearing in the middle. The second fixing plates are semi-circular in shape, and two second fixing plates form a circular shape with a central hole. The third fixing plates are also semi-circular, and two third fixing plates form a circular shape with a central hole. The central hole of the first fixing plate corresponds to the central hole formed by the two second fixing plates and the central hole formed by the two third fixing plates. The main shaft passes through the central hole formed by the two second fixing plates and the central hole formed by the two third fixing plates. The connecting seam between the two second fixing plates is perpendicular to the connecting seam between the two third fixing plates. The third fixing plates are connected to the second fixing plates via second bolts and second nuts.

[0007] A first guide sealing structure is provided between the piston body and the cylinder liner. The first guide sealing structure is located on the inner wall of the lower end opening of the cylinder liner. A second guide sealing structure is provided between the stabilizing tail rod and the fixed end cover. The second guide sealing structure is located on the inner wall of the central opening of the fixed end cover. The double-ended guide piston moves telescopically along the guiding direction of the first guide sealing structure and the second guide sealing structure.

[0008] The cylinder body has a first oil port communicating with the working chamber of the cylinder body; the fixed plate has a second oil port and a third oil port; the piston body chamber on the upper side of the sub-piston is a rodless chamber, and the piston body chamber on the lower side of the sub-piston is a rod chamber; the second oil port communicates with the rodless chamber of the piston body, and the third oil port communicates with the rod chamber of the piston body; the second oil port communicates with the rodless chamber of the piston body through a first oil passage, which passes through the fixed plate and the piston body; the third oil port communicates with the rod chamber of the piston body through a second oil passage, which passes through the fixed plate.

[0009] Several grooves are formed on the inner wall of the lower end opening of the cylinder liner. The first guide sealing structure includes multiple first O-rings, first step seals, and first dust seals. The first O-rings, first step seals, and first dust seals are installed in the grooves of the cylinder liner and are sleeved on the piston body.

[0010] The inner wall of the central opening of the fixed end cap has several grooves. The second guide sealing structure includes multiple second O-rings, second step seals, and second dust rings. The second O-rings, second step seals, and second dust rings are installed in the grooves of the fixed end cap and are sleeved on the stabilizing tail rod.

[0011] A boss is provided in the rodless cavity of the piston body. The boss is located at the upper end of the inner wall of the rodless cavity of the piston body. The diameter of the boss is smaller than the diameter of the rodless cavity of the piston body, and an annular cavity is formed around the boss.

[0012] The first oil passage is connected to the rodless chamber of the piston body through an annular chamber.

[0013] A limiting device is installed on the stabilizing tail rod. The limiting device includes a limiting bushing, a fixing plate, and fixing bolts. The limiting bushing is sleeved on the stabilizing tail rod and is located above the fixing end cover. The fixing plate is fixed to the upper end of the stabilizing tail rod by fixing bolts. The diameter of the fixing plate is larger than the inner diameter of the limiting bushing.

[0014] The spindle disassembly system of this invention controls the extension of a double-ended guide piston, which extends stably along a first guide sealing structure and a second guide sealing structure. The bearing to be disassembled is fixed by a bearing fixing device. The extended piston rod pushes out and disassembles the spindle at the center of the bearing. This system boasts high efficiency, strong piston rod extension force, and a stable piston rod ejection process, avoiding the instantaneous impact on the bearing caused by manual hammering. The guiding cooperation between the first guide sealing structure and the piston body, along with the guiding cooperation between the second guide sealing structure and the stabilizing tail rod, makes the extension and retraction of the double-ended guide piston more stable. The overall cylinder is reliable, durable, and operates stably. Attached Figure Description

[0015] Figure 1 is a schematic diagram of the spindle disassembly system of the present invention.

[0016] Figure 2 is a bottom view of the bearing fixing device of the present invention.

[0017] In the diagram: 10 Cylinder block; 11 Cylinder liner; 12 Fixed end cap; 13 First guide sealing structure; 14 Second guide sealing structure; 15 First oil port; 20 Double-end guide piston; 21 Piston body; 22 Stabilizing tail rod; 23 Second oil port; 24 Third oil port; 25 Fixed disc; 26 First oil passage; 27 Second oil passage; 28 Boss; 29 Annular chamber; 251 Connecting seat; 30 Main shaft ejector piston unit; 31 Sub-piston; 32 Piston rod; 40 Limiting device; 41 Limiting bushing; 42 Fixing plate; 43 Fixing bolt; 50 Bearing fixing device; 51 First fixing plate; 52 Second fixing plate; 53 Third fixing plate; 54 First bolt; 55 First nut; 56 Second bolt; 57 Second nut; 60 Bearing; 70 Main shaft. Detailed Implementation

[0018] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0019] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0020] 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 in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0021] This invention provides a spindle disassembly system, as shown in Figure 1, comprising: a cylinder body 10, a double-ended guide piston 20, a spindle ejector piston unit 30, and a bearing fixing device 50. The cylinder body 10 is formed by connecting a cylinder sleeve 11 and a fixed end cover 12. The fixed end cover 12 is sealed and connected to the upper end of the cylinder sleeve 11. The double-ended guide piston 20 includes a piston body 21 and a stabilizing tail rod 22. The piston body 21 is cylindrical, and the stabilizing tail rod 22 is cylindrical. The diameter of the stabilizing tail rod 22 is smaller than the diameter of the piston body 21. The stabilizing tail rod 22 is connected to the upper end of the piston body 21, and the stabilizing tail rod 22 and the piston body 21 share a common central axis.

[0022] The piston body 21 moves vertically within the cylinder liner 11, and a first guide sealing structure 13 is provided between the piston body 21 and the cylinder liner 11. Several grooves are formed on the inner wall of the cylinder liner 11. The first guide sealing structure 13 includes multiple first O-rings, first step seals, and first dust rings. The first O-rings, first step seals, and first dust rings are installed in the grooves of the cylinder liner 11 and are fitted onto the piston body 21.

[0023] The fixed end cap 12 has a central opening, through which the stabilizing tail rod 22 passes upward and is slidably and sealingly connected with the central opening. A second guide sealing structure 14 is provided between the stabilizing tail rod 22 and the fixed end cap 12. Several grooves are formed in the inner wall of the central opening of the fixed end cap 12. The second guide sealing structure 14 includes multiple second O-rings, second step seals, and second dust rings. The second O-rings, second step seals, and second dust rings are installed in the grooves of the fixed end cap 12 and are sleeved on the stabilizing tail rod 22.

[0024] The double-ended guide piston 20 has two guiding structures: a first guide sealing structure 13 and a second guide sealing structure 14. The double-ended guide piston 20 moves in extension and retraction along the guiding direction of the first guide sealing structure 13 and the second guide sealing structure 14. The first guide sealing structure 13 and the second guide sealing structure 14 together guide and stabilize the vertical extension and retraction of the double-ended guide piston 20.

[0025] A first oil port 15 is provided on the cylinder body 10, and the first oil port 15 is connected to the working chamber inside the cylinder body 10. The working chamber of the cylinder body 10 is located above the piston body 21.

[0026] The lower end of the double-ended guide piston 20 is provided with a chamber, and the lower end of the piston body 21 is fixedly mounted with a fixed disk 25. The main shaft ejects the piston unit 30, which includes a sub-piston 31 and a piston rod 32. The sub-piston 31 is disposed in the chamber of the double-ended guide piston 20 and moves vertically. The piston rod 32 is fixedly connected to the sub-piston 31 and extends downward from the lower end of the double-ended guide piston 20. The fixed disk 25 has a central opening, and the piston rod 32 moves downward through the central opening of the fixed disk 25. The piston rod 32 is sealed to the fixed disk 25. The circumference of the fixed disk 25 includes several connecting seats 251, which are fixedly mounted on the fixed disk (25). A bearing fixing device 50 is fixedly mounted on the connecting seats 251.

[0027] The bearing fixing device 50 includes a first fixing plate 51, two second fixing plates 52, two third fixing plates 53, and several first bolts 54, first nuts 55, second bolts 56, and second nuts 57. The first fixing plate 51 is fixedly installed on the connecting seat 251. The first bolts 54 pass through the first fixing plate 51 and the second fixing plates 52 from top to bottom. The first nuts 55 are threadedly connected to the first bolts 54 and are located below the second fixing plates 52. The second fixing plate 52 is connected to the first fixing plate 51 through the first bolts 54 and the first nuts 55. The first fixing plate 51 and the second fixing plate 52 clamp the bearing 60 in the middle and fix it.

[0028] The first fixing plate 51 has a central opening. Referring to Figure 2, the second fixing plate 52 is semi-circular. The two second fixing plates 52 form a circular shape with a central opening. The third fixing plate 53 is semi-circular. The two third fixing plates 53 form a circular shape with a central opening. The central opening of the first fixing plate 51 corresponds to the central opening formed by the two second fixing plates 52 and the central opening formed by the two third fixing plates 53, sharing a common central axis. The main shaft 70 passes through the central opening formed by the two second fixing plates 52 and the central opening formed by the two third fixing plates 53. As shown in Figure 2, the connecting seam between the two second fixing plates 52 is perpendicular to the connecting seam between the two third fixing plates 53. Each third fixing plate 53 is fixedly connected to the two second fixing plates 52 by two sets of second bolts 56 and second nuts 57. The second bolts 56 pass through the second fixing plates 52 and the third fixing plates 53, and the second nuts 57 are threadedly connected to the second bolts 56, thus fixing the third fixing plate 53 to the two second fixing plates 52.

[0029] The fixed plate 25 has a second oil port 23 and a third oil port 24. The chamber of the piston body 21 on the upper side of the sub-piston 31 is a rodless chamber, and the chamber of the piston body 21 on the lower side of the sub-piston 31 is a rod chamber. The second oil port 23 is connected to the rodless chamber of the piston body 21 through the first oil passage 26, which passes through the fixed plate 25 and the piston body 21. The third oil port 24 is connected to the rod chamber of the piston body 21 through the second oil passage 27, which passes through the fixed plate 25.

[0030] A boss 28 is provided in the rodless cavity of the piston body 21. The boss 28 is located at the upper end of the inner wall of the rodless cavity of the piston body 21. The diameter of the boss 28 is smaller than the diameter of the rodless cavity of the piston body 21. An annular chamber 29 is formed around the boss 28. The first oil passage 26 communicates with the rodless cavity of the piston body 21 through the annular chamber 29. When the sub-piston 31 is in contact with the boss 28, the first oil passage 26 inputs hydraulic oil into the annular chamber 29, providing a downward force to the sub-piston 31, and the piston rod 32 extends downward.

[0031] A limiting device 40 is installed on the stabilizing tail rod 22. The limiting device 40 includes a limiting bushing 41, a fixing plate 42, and fixing bolts 43. The limiting bushing 41 is sleeved on the stabilizing tail rod 22 and is located above the fixing end cover 12. The fixing plate 42 is fixed to the upper end of the stabilizing tail rod 22 by the fixing bolts 43, and the diameter of the fixing plate 42 is larger than the inner diameter of the limiting bushing 41. When the double-ended guide piston 20 moves downward, after moving a certain distance, the two ends of the limiting bushing 41 abut against the fixing plate 42 and the fixing end cover 12 respectively, preventing the double-ended guide piston 20 from moving further downward, thus limiting the downward extension distance of the double-ended guide piston 20. By replacing the limiting bushing 41 with different lengths, different downward extension distances of the double-ended guide piston 20 can be achieved.

[0032] When disassembling the bearing 60 on the spindle 70, as shown in Figures 1-2, the spindle disassembly system of the present invention positions two semi-circular second fixing plates 52 on both sides of the spindle 70. The two second fixing plates 52 are moved toward the spindle 70 and assembled into a circle. The spindle 70 is located in the central opening formed by the assembly of the two second fixing plates 52. Two third fixing plates 53 are assembled in the same way, and the spindle 70 is located in the central opening formed by the assembly of the two third fixing plates 53. As shown in Figure 1, the bearing 60 is located above the third fixing plate 53 and the second fixing plate 52. The third fixing plate 53 is fixedly connected to the second fixing plate 52. The first fixing plate 51 is fixedly installed on the connecting seat 251. The first oil... Hydraulic oil is input into the working chamber of cylinder 10 through port 15, and piston body 21 extends downward. Referring to Figure 1, the first fixing plate 51 is located above bearing 60. The first fixing plate 51 moves downward to fit against bearing 60. The first fixing plate 51 and the second fixing plate 52 are fixedly connected using the first bolt 54 and the first nut 55. Bearing 60 is fixed between the first fixing plate 51 and the second fixing plate 52. Hydraulic oil is input into the rodless chamber of piston body 21 through the second oil port 23 and the first oil passage 26, controlling the piston rod 32 to extend downward. The piston rod 32 passes through the central opening of the first fixing plate 51 and abuts against the main shaft 70, so that bearing 60 is removed from the main shaft 70.

[0033] During operation, a lifting device is used to connect the cylinder 10, and the spindle disassembly system of the present invention is lifted above the spindle 70 and the bearing 60, with the spindle 70 placed vertically.

[0034] In summary, the spindle disassembly system of this invention controls the extension of the double-ended guide piston, which extends stably along the first and second guide sealing structures. The bearing fixing device secures the bearing to be disassembled, and the extended piston rod pushes out and disassembles the spindle at the center of the bearing. This results in high work efficiency, a large contact force from the extended piston rod, and a stable ejection process, avoiding the instantaneous impact on the bearing caused by manual hammering. The guiding cooperation between the first guide sealing structure and the piston body, and the guiding cooperation between the second guide sealing structure and the stabilizing tail rod, makes the extension and retraction of the double-ended guide piston more stable. The overall cylinder is reliable, durable, and operates stably.

[0035] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0036] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A spindle disassembly system, characterized in that, include: The cylinder body (10), double-ended guide piston (20), bearing fixing device (50), and main shaft ejector piston unit (30) are provided. The cylinder body (10) is formed by connecting a cylinder liner (11) and a fixed end cap (12). The fixed end cap (12) is sealed and connected to the upper end of the cylinder liner (11). The double-ended guide piston (20) includes a piston body (21) and a stabilizing tail rod (22). The stabilizing tail rod (22) is connected to the piston body (21). The piston body (21) performs piston movement in the cylinder liner (11). The piston body (21) extends from the lower end of the cylinder liner (11). The stabilizing tail rod (22) passes upward through the central opening of the fixed end cap (12) and is slidably and sealingly connected to the central opening. The lower end of the double-ended guide piston (20) is provided with The chamber is provided with a fixed plate (25) at the lower end of the double-ended guide piston (20). The main shaft ejector piston unit (30) includes a sub-piston (31) and a piston rod (32). The sub-piston (31) is set in the chamber of the double-ended guide piston (20) and performs piston movement. The piston rod (32) is fixedly connected to the sub-piston (31). The piston rod (32) passes downward through the central opening of the fixed plate (25) and performs telescopic movement. The piston rod (32) extends out and abuts against the main shaft (70). The circumference of the fixed plate (25) includes several connecting seats (251). The bearing fixing device (50) is fixedly installed on the connecting seat (251). The bearing fixing device (50) fixes the bearing (60) to the lower end of the double-ended guide piston (20).

2. The spindle disassembly system according to claim 1, characterized in that, The bearing fixing device (50) includes a first fixing plate (51) and a second fixing plate (52). The first fixing plate (51) is fixed on the connecting seat (251). The first fixing plate (51) and the second fixing plate (52) are connected to clamp and fix the bearing (60). The inner ring of the bearing (60) is fitted with a spindle (70). The center opening of the first fixing plate (51) is correspondingly set with the piston rod (32). The piston rod (32) extends through the center opening of the first fixing plate (51) and abuts against the spindle (70).

3. The spindle disassembly system according to claim 2, characterized in that, The bearing fixing device (50) includes a first fixing plate (51), two second fixing plates (52), two third fixing plates (53), and several first bolts (54), first nuts (55), second bolts (56), and second nuts (57). The second fixing plates (52) are connected to the first fixing plates (51) by the first bolts (54) and the first nuts (55). The first fixing plates (51) and the second fixing plates (52) clamp the bearing (60) in the middle and fix it. The second fixing plates (52) are semi-circular in shape, and the two second fixing plates (52) form a circular shape with a central hole. The third fixing plates (53) The first fixing plate (51) is semi-circular in shape. The two third fixing plates (53) form a circular shape with a central hole. The central hole of the first fixing plate (51) corresponds to the central hole formed by the two second fixing plates (52) and the central hole formed by the two third fixing plates (53). The main shaft (70) passes through the central hole formed by the two second fixing plates (52) and the central hole formed by the two third fixing plates (53). The connecting seam between the two second fixing plates (52) is perpendicular to the connecting seam between the two third fixing plates (53). The third fixing plate (53) is connected to the second fixing plate (52) by the second bolt (56) and the second nut (57).

4. The spindle disassembly system according to claim 1, characterized in that, A first guide sealing structure (13) is provided between the piston body (21) and the cylinder liner (11). The first guide sealing structure (13) is located on the inner wall of the lower end opening of the cylinder liner (11). A second guide sealing structure (14) is provided between the stabilizing tail rod (22) and the fixed end cap (12). The second guide sealing structure (14) is located on the inner wall of the center opening of the fixed end cap (12). The double-ended guide piston (20) moves in extension and retraction along the guiding direction of the first guide sealing structure (13) and the second guide sealing structure (14).

5. The spindle disassembly system according to claim 1, characterized in that, The cylinder (10) has a first oil port (15) that communicates with the working chamber of the cylinder (10); the fixed plate (25) has a second oil port (23) and a third oil port (24). The chamber of the piston body (21) on the upper side of the sub-piston (31) is a rodless chamber, and the chamber of the piston body (21) on the lower side of the sub-piston (31) is a rod chamber. The second oil port (23) communicates with the rodless chamber of the piston body (21), and the third oil port (24) communicates with the rod chamber of the piston body (21). The second oil port (23) communicates with the rodless chamber of the piston body (21) through the first oil passage (26). The first oil passage (26) passes through the fixed plate (25) and the piston body (21). The third oil port (24) communicates with the rod chamber of the piston body (21) through the second oil passage (27). The second oil passage (27) passes through the fixed plate (25).

6. The spindle disassembly system according to claim 4, characterized in that, Several grooves are formed on the inner wall of the lower end opening of the cylinder liner (11). The first guide sealing structure (13) includes multiple first O-rings, first step seals, and first dust seals. The first O-rings, first step seals, and first dust seals are installed in the grooves of the cylinder liner (11). The first O-rings, first step seals, and first dust seals are fitted on the piston body (21).

7. The spindle disassembly system according to claim 4, characterized in that, The fixed end cap (12) has several grooves on the inner wall of the central opening. The second guide sealing structure (14) includes multiple second O-rings, second step seals, and second dust rings. The second O-rings, second step seals, and second dust rings are installed in the grooves of the fixed end cap (12) and are sleeved on the stabilizing tail rod (22).

8. The spindle disassembly system according to claim 5, characterized in that, A boss (28) is provided in the rodless cavity of the piston body (21). The boss (28) is located at the upper end of the inner wall of the rodless cavity of the piston body (21). The diameter of the boss (28) is smaller than the diameter of the rodless cavity of the piston body (21). An annular cavity (29) is formed around the boss (28).

9. The spindle disassembly system according to claim 8, characterized in that, The first oil passage (26) is connected to the rodless chamber of the piston body (21) through the annular chamber (29).

10. The spindle disassembly system according to claim 1, characterized in that, A limiting device (40) is installed on the stabilizing tail rod (22). The limiting device (40) includes a limiting bushing (41), a fixing plate (42), and a fixing bolt (43). The limiting bushing (41) is sleeved on the stabilizing tail rod (22) and is located above the fixing end cover (12). The fixing plate (42) is fixed to the upper end of the stabilizing tail rod (22) by the fixing bolt (43). The diameter of the fixing plate (42) is larger than the inner diameter of the limiting bushing (41).

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