Pin shaft dismounting device and method for torsion bar connecting seat

Abstract

The invention discloses a pin shaft dismounting device and method.The pin shaft dismounting device comprises a first support, a second support and a third dismounting hole formed along the axis of a third shaft section, a first dismounting hole is formed in the middle of the first support, and a first bolt is arranged in the first dismounting hole; nuts are arranged between the first bolts and the first supports, the first supports are clamped to the two ends of the first connecting base, second dismounting holes are formed in the middles of the second supports, second bolts are arranged in the second dismounting holes, and the second supports are clamped to the two ends of the second connecting base. According to the invention, through the thrust of the first bolt and the tension of the second bolt, the equipment can realize the non-destructive or tiny scratch dismounting of the pin shaft and the replacement of the knuckle bearing in a short time, so that the shutdown time of a host machine caused by the replacement of the pin shaft or the knuckle bearing is effectively shortened; and irreversible structural damage to other parts adjacent to the tilting device in the pin shaft dismounting process is avoided, the equipment maintenance cost is reduced, and the equipment overhaul efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of steel-making converter tilting devices, and in particular relates to a pin removal device and method for a torsion bar connecting seat. Background Art

[0002] The converter tilting device is the core equipment of the steelmaking converter, which mainly provides power and braking force for the whole process of converter steelmaking. Its operation characteristics are: low speed, heavy load, frequent starting and braking, and two-way operation. Therefore, the stability of the tilting device directly determines the smoothness of the steelmaking process of the whole set of equipment. The tilting force and impact force generated by the tilting device during operation need to be transmitted to the civil engineering foundation through the torsion bar device, and the torsion bar connecting seat is an important connecting component for transmitting the tilting force and impact force.

[0003] like Figure 1 As shown, the torsion bar connecting seat assembly components of the tilting device are mainly composed of a connecting seat, a pin shaft, a spherical bearing, etc., wherein the spherical bearing and the pin shaft are installed by interference fit, so the pin shaft needs to be cooled with liquid nitrogen before installation to reduce its outer diameter to ensure that it can be smoothly installed in the inner hole of the spherical bearing. Due to the harsh operating conditions of the equipment and large vibration and impact, the spherical bearing that resists the impact load of the equipment must be replaced after reaching its expected life. Before replacement, the pin shaft in its inner hole needs to be removed. Since the pin shaft and the spherical bearing are interference fit and are completely embedded in the entire equipment, the deformation and force directions of the various attached parts connected thereto are inconsistent, resulting in the pin shaft and the connecting seat being prone to uncoordinated deformation during operation, which greatly increases the possibility of the pin shaft getting stuck and the difficulty of removal.

[0004] In the prior art, many companies have adopted destructive demolition methods such as flame cutting and violent hammering. These traditional demolition methods not only take a long time to remove and replace parts, require a large number of replaced parts, and have low demolition efficiency, but also easily cause irreversible structural damage to other adjacent parts in the tilting device, thereby increasing unnecessary demolition costs. In summary, there is an urgent need for a pin removal device and method for a torsion bar connector. Summary of the invention

[0005] In order to solve part or all of the technical problems existing in the above-mentioned prior art, the present invention provides a pin removal device and method for a torsion bar connecting seat.

[0006] On the one hand, the present invention provides a pin removal device for a torsion bar connecting seat, the torsion bar connecting seat comprising a first connecting seat and a second connecting seat symmetrically arranged, a base arranged at one end of the first connecting seat and the second connecting seat, a first mounting hole is opened at the center of the first connecting seat, a second mounting hole is opened at the center of the second connecting seat, a pin is arranged in the first mounting hole and the second mounting hole, the pin comprises a second shaft segment, a first shaft segment and a third shaft segment arranged at both ends of the second shaft segment, a joint bearing is arranged between the first connecting seat and the second connecting seat, a fixing hole is opened in the joint bearing, the second shaft segment is interference fit in the fixing hole, a shaft shoulder is arranged at one end of the third shaft segment away from the second shaft segment, the shaft shoulder abuts against the outer side of the second connecting seat, the pin removal device comprises a first bracket, a second bracket, and a third disassembly hole opened along the axis of the third shaft segment, wherein:

[0007] A first disassembly hole is opened in the middle of the first bracket, a first bolt is arranged in the first disassembly hole, a nut is arranged between the first bolt and the first bracket, the nut is threadedly connected to the outer periphery of the first bolt, the first bracket is clamped at both ends of the first connecting seat, and a symmetrical claw is arranged on one side of the first bracket, and the claw abuts against the inner side of the first connecting seat;

[0008] A second disassembly hole is opened in the middle of the second bracket, and a second bolt is arranged in the second disassembly hole. One end of the second bolt is threadedly connected to the third disassembly hole. The second bracket is clamped at both ends of the second connecting seat, and a symmetrical clamping groove is arranged on one side of the second bracket, and the clamping groove abuts against the outer side of the second connecting seat.

[0009] Furthermore, in the above-mentioned pin removal device for the torsion bar connecting seat, the first shaft section is located in the first mounting hole, and the third shaft section is located in the second mounting hole.

[0010] As a specific implementation, in the above-mentioned pin removal device for the torsion bar connecting seat, the connection between the nut and the outer side of the first bracket is welding.

[0011] As a specific embodiment, in the above-mentioned pin shaft removal device for the torsion bar connecting seat, a first thrust bearing is arranged between the first bolt and the first shaft section, and one end of the first thrust bearing abuts against the end face of the first shaft section, and the other end abuts against the end face of the first bolt.

[0012] As a specific implementation, in the above-mentioned pin removal device for the torsion bar connecting seat, a thrust plate is arranged between the first bolt and the first thrust bearing.

[0013] As a specific implementation, in the above-mentioned pin removal device for the torsion bar connecting seat, the connection method between the push plate and the first bolt is welding.

[0014] As a specific implementation, in the above-mentioned pin removal device for the torsion bar connecting seat, a fixing groove is opened at one end of the push plate, and the first bolt is clamped in the fixing groove.

[0015] As a specific embodiment, in the above-mentioned pin removal device for the torsion bar connecting seat, a second thrust bearing is arranged between the second bolt and the second bracket, and one end of the second thrust bearing abuts against the second bolt and the other end abuts against the outside of the second bracket.

[0016] On the other hand, the pin removal method for the torsion bar connecting seat provided by the present invention comprises:

[0017] Step 1: Calculate the axial force required to push the second shaft segment out of the fixing hole in the axial direction to overcome the friction force according to the assembly interference between the second shaft segment and the fixing hole;

[0018] Step 2: According to the axial force, a bolt specification corresponding to the axial force is selected, and an internal thread matching the bolt specification is provided in the third disassembly hole, so that the external thread of the second bolt matches the internal thread, and the hole depth of the third disassembly hole matches the axial length of the second shaft segment;

[0019] Step 3: Set the first bracket on the first connecting seat, and the second bracket on the second connecting seat. After screwing one end of the first bolt into the nut, pass it through the first disassembly hole and abut against the end face of the first shaft segment. After passing one end of the second bolt through the second disassembly hole, screw it into the third disassembly hole. Then, apply a certain pre-tightening to the first bolt and the second bolt so that the two bolts are pre-tensioned. Then rotate the first bolt and the second bolt until the second shaft segment is axially removed from the fixing hole. Finally, remove the first bracket, the second bracket, and the pin shaft to complete the removal of the pin shaft.

[0020] The pin removal device and method for the torsion bar connecting seat of the present invention have the following advantages and positive effects:

[0021] (1) The present invention uses the thrust force applied by the first bolt and the tension force applied by the second bolt to enable the equipment to achieve non-destructive or minor scratch removal of the pin shaft and replacement of the spherical bearing in a short time, which can effectively shorten the host machine downtime caused by replacing the pin shaft or the spherical bearing, and effectively avoid irreversible structural damage to other adjacent components in the tilting device during the removal of the pin shaft, significantly reducing the equipment maintenance cost and improving the equipment maintenance efficiency;

[0022] (2) The present invention arranges a first thrust bearing and a thrust plate between the first bolt and the first shaft section, and arranges a second thrust bearing between the second bolt and the second bracket, thereby not only reducing the friction between the various components, but also reducing the wear of the first bolt and the second bolt, making the rotation of the first bolt and the second bolt smoother and more stable, and increasing the force area of ​​the first bolt on the first shaft section, thereby having good practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings in the following descriptions are only used to further understand the embodiments of the present invention and constitute a part of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0024] Figure 1 It is a structural schematic diagram of a pin removal device for a torsion bar connecting seat of the present invention;

[0025] Figure 2 It is a three-dimensional stereogram of the pin removal device for the torsion bar connecting seat of the present invention;

[0026] Figure 3 It is a structural schematic diagram of a pin in a pin removal device for a torsion bar connecting seat of the present invention.

[0027] Description of reference numerals:

[0028] 1-first connecting seat, 2-second connecting seat, 3-base, 4-pin shaft, 41-first shaft section, 42-second shaft section, 43-third shaft section, 44-shoulder, 5-spherical bearing, 51-distance ring, 6-first bracket, 61-claw, 7-second bracket, 71-slot, 8-first bolt, 81-first thrust bearing, 82-nut, 83-thrust plate, 9-second bolt, 91-second thrust bearing. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0030] like Figures 1 to 3As shown, the present invention provides a pin removal device and method for a torsion bar connecting seat.

[0031] On the one hand, the present invention discloses a pin removal device for a torsion bar connecting seat, the torsion bar connecting seat comprises a first connecting seat 1 and a second connecting seat 2 which are symmetrically arranged, a base 3 which is arranged at one end of the first connecting seat 1 and the second connecting seat 2, a first mounting hole is opened at the center of the first connecting seat 1, a second mounting hole is opened at the center of the second connecting seat 2, a pin 4 is arranged in the first mounting hole and the second mounting hole, the pin 4 comprises a second shaft section 42, a first shaft section 41 and a third shaft section 43 which are arranged at both ends of the second shaft section 42, a joint bearing 5 is arranged between the first connecting seat 1 and the second connecting seat 2, a fixing hole is opened in the joint bearing 5, the axes of the first mounting hole, the second mounting hole and the fixing hole coincide with each other, and the second shaft section 42 is interference fitted in the fixing hole. In the fixed hole, the third shaft section 43 is provided with a shoulder 44 at one end away from the second shaft section 42, and the shoulder 44 abuts against the outer side of the second connecting seat 2. The pin shaft 4 removal device includes a first bracket 6, a second bracket 7, and a third disassembly hole opened along the axis of the third shaft section 43, wherein a first disassembly hole is opened in the middle of the first bracket 6, and the first disassembly hole is a light hole. A first bolt 8 is arranged in the first disassembly hole, and the first bolt 8 can move freely axially in the first disassembly hole. A nut 82 is arranged between the first bolt 8 and the first bracket 6, and the nut 82 is threadedly connected to the outer periphery of the first bolt 8. Of course, the first disassembly hole can also be set as a threaded hole, and it is only necessary to make the threaded hole consistent with the bolt specifications of the nut 82. The first bracket 6 is clamped at both ends of the first connecting seat 1, and the first bracket A symmetrical claw 61 is provided on one side of 6, and the claw 61 abuts against the inner side of the first connecting seat 1. When installing the first bracket 6 to the first connecting seat 1, it is only necessary to sleeve the first bracket 6 from the top of the first connecting seat 1 and move it until the axis of the first bolt 8 is located at the center of the end face of the first shaft section 41, and then the first bolt 8 is rotated in the positive direction. Through the meshing action between the first bolt 8 and the nut 82, the end face of the first bolt 8 is gradually pushed toward the end face of the first shaft section 41, and then the claw 61 is gradually and tightly fitted to the inner side of the first connecting seat 1, and the position between the first bracket 6 and the first connecting seat 1 is gradually relatively fixed, completing the installation of the first bracket 6 to the first connecting seat 1; a second disassembly hole is opened in the middle of the second bracket 7, and the second disassembly hole is a light hole. A second bolt 9 is provided, and the second bolt 9 can move freely axially in the second disassembly hole. One end of the second bolt 9 is threadedly connected to the third disassembly hole. The second bracket 7 is clamped at both ends of the second connecting seat 2. A symmetrical clamping groove 71 is provided on one side of the second bracket 7, and the clamping groove 71 abuts against the outer side of the second connecting seat 2. When installing the second bracket 7 to the second connecting seat 2, first screw the threaded section of the second bolt 9 into the third disassembly hole, then abut the clamping groove 71 against the outer side of the second connecting seat 2, and finally rotate the second bolt 9 in the positive direction. Through the meshing action of the second bolt 9 and the third disassembly hole, the second bracket 7 gradually moves closer to the second connecting seat 2 until the clamping groove 71 is tightly fitted to the outer side of the second connecting seat 2, and the second bracket 7 is installed to the second connecting seat 2.

[0032] Furthermore, in the pin removal device for the torsion bar connecting seat of the present invention, the first shaft section 41 is located in the first mounting hole, and the third shaft section 43 is located in the second mounting hole.

[0033] As a specific implementation, in the pin removal device for the torsion bar connecting seat of the present invention, the connection between the nut 82 and the outer side of the first bracket 6 is welding.

[0034] As a specific embodiment, in the pin removal device for the torsion bar connecting seat of the present invention, a first thrust bearing 81 is arranged between the first bolt 8 and the first shaft segment 41, and one end of the first thrust bearing 81 abuts against the end face of the first shaft segment 41, and the other end abuts against the end face of the first bolt 8. The first thrust bearing 81 is used to achieve that one side of the first thrust bearing 81 is relatively fixed with the first bolt 8, and the other side is relatively fixed with the end face of the first shaft segment 41. Such an arrangement reduces the wear on the end face of the first bolt 8 during rotation, reduces the friction between the first bolt 8 and the end face of the first shaft segment 41, increases the force area of ​​the first bolt 8 on the end face of the first shaft segment 41, and makes the rotation of the first bolt 8 smoother.

[0035] As a specific embodiment, in the pin removal device for the torsion bar connecting seat of the present invention, a push plate 83 is arranged between the first bolt 8 and the first thrust bearing 81, and one end of the push plate 83 abuts against the first bolt 8, and the other end abuts against the first thrust bearing 81. Such an arrangement increases the force area of ​​the first bolt 8 on the end face of the first shaft section 41.

[0036] As a specific implementation, in the pin removal device for the torsion bar connecting seat of the present invention, the connection between the push plate 83 and the first bolt 8 is welding.

[0037] As a specific implementation manner, in the pin shaft removal device for the torsion bar connecting seat of the present invention, a fixing groove is opened at one end of the push plate 83, and the first bolt 8 is clamped in the fixing groove. As an embodiment, the push plate 83 can also have fixing grooves opened at both ends, one of the fixing grooves is clamped in the first bolt, and the other fixing groove is clamped in the first thrust bearing 81.

[0038] As a specific embodiment, in the pin removal device for the torsion bar connecting seat of the present invention, a second thrust bearing 91 is arranged between the second bolt 9 and the second bracket 7, and one end of the second thrust bearing 91 abuts against the second bolt 9, and the other end abuts against the outside of the second bracket 7. The second thrust bearing 91 is implemented so that one side of the second thrust bearing 91 is relatively fixed with the second bolt 9, and the other side is relatively fixed with the outside of the second bracket 7. Such an arrangement reduces the wear on the head of the second bolt 9 during rotation, reduces the friction between the second bolt 9 and the second bracket 7, and makes the rotation of the second bolt 9 smoother.

[0039] On the other hand, the pin removal method for the torsion bar connecting seat of the present invention is implemented using the above-mentioned pin removal device, and specifically includes the following steps:

[0040] Step 1: Calculate the axial force required to push the second shaft segment 42 out of the fixing hole in the axial direction to overcome the friction force according to the assembly interference between the second shaft segment 42 and the fixing hole;

[0041] Step 2: According to the axial force, select the corresponding bolt specification, the standard preload force of which is greater than the axial force of the push pin 4, and then set an internal thread matching the bolt specification in the third disassembly hole, so that the external thread of the second bolt 9 matches the internal thread, and ensure that the hole depth of the third disassembly hole matches the axial length of the second shaft section 42. Preferably, the external thread of the first bolt 8 and the internal thread of the nut 82 both match the bolt specification;

[0042] Step 3: Set the first bracket 6 on the first connecting seat 1, and the second bracket 7 on the second connecting seat 2. After screwing one end of the first bolt 8 into the nut 82, pass it through the first disassembly hole and abut against the end face of the first shaft section 41. After passing one end of the second bolt 9 through the second disassembly hole, screw it into the third disassembly hole. Then, apply a certain pre-tightening to the first bolt 8 and the second bolt 9 so that the two bolts are pre-tensioned. Then, according to the actual disassembly and assembly needs, rotate the first bolt 8 and the second bolt 9 synchronously or successively until the second shaft section 42 is removed from the fixing hole along the axial direction. Finally, remove the first bracket 6, the second bracket 7, and the pin shaft 4 to complete the disassembly of the pin shaft 4. In addition, during the disassembly process, when the first bolt 8 is rotated in the forward direction, through the meshing action between the first bolt 8 and the nut 82, and the tight fit between the claw 61 and the first connecting plate, the end face of the first bolt 8 will gradually advance toward the end face of the first shaft segment 41 as the rotation progresses, thereby driving the first shaft segment 41 to move toward the second shaft segment 42. When the second bolt 9 is rotated in the forward direction, through the meshing action of the second bolt 9 and the third disassembly hole, and the tight fit between the slot 71 and the second connecting seat 2, the third shaft segment 43 will gradually move toward the second bracket 7 as the second bolt 9 rotates, thereby achieving the effect of pushing the second shaft segment 42 out of the fixing hole.

[0043] Furthermore, in the pin removal method for the torsion bar connecting seat of the present invention, after the completion of step 2, the tilting device needs to be run back to the zero position, and the power to its motor and brake is cut off. The brake will automatically lock the equipment. At the same time, the support pad is filled in the gap between the torsion bar stop seat and the secondary reducer housing of the tilting device to prevent the tilting device from falling or swinging along the ear shaft axis after the pin 4 is removed.

[0044] In summary, compared with the prior art, the pin removal device and method for the torsion bar connector of the present invention has the following advantages and positive effects:

[0045] (1) The present invention uses the thrust of the first bolt 8 and the tension of the second bolt 9 to enable the equipment to achieve non-destructive or minor scratch removal of the pin shaft 4 and replacement of the spherical bearing 5 in a short time, which can effectively shorten the downtime of the main machine caused by replacing the pin shaft 4 or the spherical bearing 5, and effectively avoid irreversible structural damage to other adjacent parts of the tilting device during the removal of the pin shaft 4, significantly reducing the equipment maintenance cost and improving the equipment maintenance efficiency;

[0046] (2) The present invention arranges a first thrust bearing 81 and a thrust plate 83 between the first bolt 8 and the first shaft section 41, and arranges a second thrust bearing 91 between the second bolt 9 and the second bracket 7, thereby not only reducing the friction between the various components, but also reducing the wear of the first bolt 8 and the second bolt 9, making the rotation of the first bolt 8 and the second bolt 9 smoother and more stable, and increasing the force area of ​​the first bolt 8 on the first shaft section 41, thereby having good practicality.

[0047] It should be noted that, in this article, unless otherwise clearly specified and limited, the term "connection" or its synonyms should be understood in a broad sense. For example, "connection" can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. Moreover, expressions such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. At the same time, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such a process, method, article or device. In addition, "front", "back", "left", "right", "upper" and "lower" in this article are all referenced to the placement state shown in the accompanying drawings.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pin removal device for a torsion bar connecting seat, the torsion bar connecting seat comprising a first connecting seat and a second connecting seat symmetrically arranged, and a base arranged at one end of the first connecting seat and the second connecting seat, a first mounting hole is opened at the center of the first connecting seat, a second mounting hole is opened at the center of the second connecting seat, a pin is arranged in the first mounting hole and the second mounting hole, the pin comprises a second shaft section, a first shaft section and a third shaft section arranged at both ends of the second shaft section, a joint bearing is arranged between the first connecting seat and the second connecting seat, a fixing hole is opened in the joint bearing, the second shaft section is interference fit in the fixing hole, a shaft shoulder is arranged at one end of the third shaft section away from the second shaft section, and the shaft shoulder abuts against the outer side of the second connecting seat, characterized in that The pin removal device comprises a first bracket, a second bracket, and a third disassembly hole opened along the axis of the third shaft segment, wherein: A first disassembly hole is opened in the middle of the first bracket, a first bolt is arranged in the first disassembly hole, a nut is arranged between the first bolt and the first bracket, the nut is threadedly connected to the outer periphery of the first bolt, the first bracket is clamped at both ends of the first connecting seat, and a symmetrical claw is arranged on one side of the first bracket, and the claw abuts against the inner side of the first connecting seat; A second disassembly hole is opened in the middle of the second bracket, and a second bolt is arranged in the second disassembly hole. One end of the second bolt is threadedly connected to the third disassembly hole. The second bracket is clamped at both ends of the second connecting seat, and a symmetrical clamping groove is arranged on one side of the second bracket, and the clamping groove abuts against the outer side of the second connecting seat.

2. The pin removal device for a torsion bar connection seat according to claim 1, characterized in that: The first shaft section is located in the first mounting hole, and the third shaft section is located in the second mounting hole.

3. The pin removal device for a torsion bar connection seat according to claim 1, characterized in that: The nut is connected to the outer side of the first bracket by welding.

4. The pin removal device for a torsion bar connection seat according to claim 1, characterized in that: A first thrust bearing is arranged between the first bolt and the first shaft section, one end of the first thrust bearing abuts against the end surface of the first shaft section, and the other end of the first thrust bearing abuts against the end surface of the first bolt.

5. The pin removal device for a torsion bar connection seat according to claim 4, characterized in that: A thrust plate is arranged between the first bolt and the first thrust bearing.

6. The pin removal device for a torsion bar connection seat according to claim 5, characterized in that: The push plate and the first bolt are connected by welding.

7. The pin removal device for a torsion bar connection seat according to claim 5, characterized in that: A fixing groove is formed at one end of the push plate, and the first bolt is clamped in the fixing groove.

8. The pin removal device for a torsion bar connector according to claim 1, characterized in that: A second thrust bearing is arranged between the second bolt and the second bracket, and one end of the second thrust bearing abuts against the second bolt, and the other end abuts against the outer side of the second bracket.

9. A method for removing a pin for a torsion bar connector, the method for removing a pin being implemented using the pin removing device according to any one of claims 1 to 8, comprising: Step 1: Calculate the axial force required to push the second shaft segment out of the fixing hole in the axial direction to overcome the friction force according to the assembly interference between the second shaft segment and the fixing hole; Step 2: According to the axial force, a bolt specification corresponding to the axial force is selected, and an internal thread matching the bolt specification is provided in the third disassembly hole, so that the external thread of the second bolt matches the internal thread, and the hole depth of the third disassembly hole matches the axial length of the second shaft segment; Step 3: Set the first bracket on the first connecting seat, and the second bracket on the second connecting seat. After screwing one end of the first bolt into the nut, pass it through the first disassembly hole and abut against the end face of the first shaft segment. After passing one end of the second bolt through the second disassembly hole, screw it into the third disassembly hole. Then, apply a certain pre-tightening to the first bolt and the second bolt so that the two bolts are pre-tensioned. Then rotate the first bolt and the second bolt until the second shaft segment is axially removed from the fixing hole. Finally, remove the first bracket, the second bracket, and the pin shaft to complete the removal of the pin shaft.

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