A device for mounting and demounting a bushing in a hole of a part

Abstract

The application discloses a kind of installation and dismounting device of part inner hole bushing, shell and slide rail are fixed in the upper and lower ends of the one end of fixed support optical axis;Lower end of sliding block is slidably embedded in the T-shaped through slot of slide rail, upper end is worn in the square recess of shell;The optical axis of fixed support is worn in the exhaust hole II of sliding block, reset compression spring on the optical axis is located between fixed support and sliding block;Limit screw is screwed in the threaded hole of fixed support;Positioning shaft support is fixed on the side of shell, sliding positioning shaft is slidably installed in the positioning hole of positioning shaft support;Movable base is slidably embedded in the T-shaped through slot of slide rail;Lower end of movable support is fixed in one end of movable base;Adjustable support is fixed in the vertical through slot of movable support with fine adjustment position;Fixed shaft is locked and fixed on adjustable support by fastening nut.The application is suitable for large quantities of bushing fast installation and dismounting, installation and dismounting stress is uniform, assembly quality is high, no longer damage part hole when dismounting.

Description

Technical Field

[0001] This invention belongs to the field of mechanical assembly and relates to a device for installing and removing inner hole bushings of parts. Background Technology

[0002] Bushings are widely used in mechanical products. When the material of a part is not wear-resistant, installing a wear-resistant aluminum bronze bushing inside its hole or on the shaft can reduce wear between the two parts and extend their service life. After prolonged use, when the bushing wears out, it can be directly replaced, facilitating maintenance and reducing costs. Bushing installation is generally divided into cold shrinkage installation and thermal expansion installation. Cold shrinkage installation involves placing the bushing in liquid nitrogen to cool it, reducing its outer diameter; this is used for interference fits of bushings inside part holes. Thermal expansion installation involves placing the bushing in a heating device to expand its inner diameter; this is used for interference fits of bushings on shafts.

[0003] For interference fits of bushings inside part holes, the current method involves freezing the bushing in liquid nitrogen for a certain period during assembly. This causes the outer diameter to shrink, ensuring no interference fit between the bushing and the part. The bushing is then removed from the liquid nitrogen, and to prevent a thick frost layer from forming on it and affecting installation, it is hammered into the hole with a rubber mallet within seconds. This method is time-consuming and inefficient, unsuitable for mass production. The extended installation time also affects assembly quality. Furthermore, the manual swinging of the rubber mallet can cause uneven force on the bushing, leading to misalignment and poor coaxiality between the bushing and the hole in the part. In severe cases, the bushing may not be fully inserted into the hole, requiring removal and reinstallation, which not only delays assembly but also damages both the part and the bushing. Another method involves elevating one end of the part and using a stepped mandrel to hammer the bushing out with a rubber mallet. This method is inefficient, unsuitable for mass production, and the uneven force during disassembly can easily damage the part hole, rendering the part unusable. Summary of the Invention

[0004] The purpose of this invention is to solve the above-mentioned problems existing in the prior art and to provide an installation and disassembly device for inner hole bushings of parts. This installation and disassembly device is suitable for rapid installation and disassembly of a large number of bushings. The installation and disassembly are uniformly stressed. There is no phenomenon of skewing during installation or reinstallation after bushing removal. The assembly quality is high. The part hole is not damaged during disassembly. The installation and disassembly efficiency is high.

[0005] To achieve the above objectives, the technical solution of the present invention is: an installation and disassembly device for an inner hole bushing of a part, comprising a slide rail, a slider, a housing, a fixed support, a limit screw, a positioning shaft support, a sliding positioning shaft, a fixed shaft, a reset spring, a movable base, a movable support, an adjustable support, a handle, an anti-detachment mechanism, and a stop mechanism.

[0006] The slide rail has a T-shaped through groove in the middle; the housing has an irregular through hole in the center, consisting of a through hole and a square groove that communicates with the through hole; the upper end of the fixed support has a threaded hole and a vent hole I in the middle, and an optical shaft extends out from one end face; the lower end of the slider matches the T-shaped through groove of the slide rail, and its upper end has a positioning plate that matches the square groove of the housing, and its lower end has a vent hole II in the middle; the housing and the slide rail are respectively fixed to the upper and lower ends of the fixed support with the optical shaft; the lower end of the slider is slidably embedded in the T-shaped through groove of the slide rail, and its upper end passes through the square groove of the housing; one end of the optical shaft of the fixed support passes through the vent hole II of the slider and passes through the optical shaft. The reset spring is located between the fixed support and the slider; the limit screw is threaded into the threaded hole of the fixed support; the sliding positioning shaft is a T-shaped shaft with a stepped end, the difference between the large and small diameters being the thickness of the bushing, the large diameter being the inner diameter of the part, and the small diameter being the inner diameter of the bushing; the positioning shaft support has a positioning hole in the center that fits with the large diameter part of the T-shaped shaft with a slight clearance, and an exhaust hole III at the lower end; the positioning shaft support is fixed to the side of the housing, the sliding positioning shaft is slidably installed in the positioning hole of the positioning shaft support, the shaft end protrudes from the positioning hole of the positioning shaft support, and the cap end can slide in the irregular through hole of the housing, the lower part of the cap end and the upper protrusion of the slider... The positioning plate contacts the upper part of the cap, which is directly opposite the limit screw. The movable base is a convex strip that matches the T-shaped groove of the slide rail. It has a vent hole IV in its center and is slidably embedded in the T-shaped groove of the slide rail. Its vent hole IV communicates with the vent hole II on the slider. The center of one end face of the movable support has a vertical groove. The upper end of the bottom wall of the vertical groove has a fixed shaft end receiving groove. Its lower end is fixed to one end of the movable base, and handles are installed on both sides. The adjustable support has a mounting step hole for the fixed shaft in its center. It is fixed in the vertical groove of the movable support with a fine-tunable position. One end of the fixed shaft has an inner hole, and the middle part has a groove for the adjustable support. The mounting step of the support matches the mounting step hole, and the other end is threaded. It passes through the mounting step hole of the adjustable support and is locked and fixed on the adjustable support by a fastening nut. The end with the inner hole is directly opposite the sliding positioning shaft and shares the same central axis with the sliding positioning shaft. When assembling the bushing, the outer diameter of the fixed shaft with the inner hole is clearance-fitted with the inner diameter of the bushing. When disassembling the inner sleeve, the inner diameter of the fixed shaft with the inner hole is larger than the inner diameter of the part, and the outer diameter of this end is smaller than the outer shape of the part. An anti-detachment mechanism for the movable support is fixed on the upper surface of the slide rail at the end away from the fixed support. A stop mechanism for the movable base is installed on the two side walls of the slide rail at the end away from the fixed support.

[0007] More preferably, the stopping mechanism includes a stopping shaft, a stopping spring, a limiting bolt, and a stopping handle; symmetrical irregular holes are opened on both sides of the slide rail away from the fixed support, the inner end of the irregular hole is a square groove, the middle is a smooth hole, and the outer end is a threaded hole that matches the limiting bolt; the middle part of the stopping shaft is divided into two parts by a large-diameter convex ring, the inner part is a square that matches the square groove on the slide rail side wall, and the outer part matches the inner hole of the limiting bolt and the end of this part is threaded; the stopping shaft is inserted into the square groove of the slide rail, passes through the inner hole of the limiting bolt, and is threaded into the threaded groove of the stopping handle; the limiting bolt is tightened into the threaded hole on the slide rail side wall, and a stopping spring is provided between the convex ring of the stopping shaft and the inner end face of the limiting bolt, which is sleeved on the stopping shaft; when stopping, the square side of the stopping shaft near the fixed support contacts the end face of the movable base near the anti-detachment mechanism.

[0008] More preferably, the adjustable support is fixed in a vertical through groove of the movable support in a finely adjustable position. Specifically, the adjustable support is thinner at the four corners than in the middle, and has four elongated holes at the four corners. The movable support has threaded holes at positions corresponding to the elongated holes on the adjustable support. The adjustable support and the movable support are fixed together by fastening screws that are pressed and fixed to the elongated holes and the corresponding threaded holes.

[0009] More preferably, the anti-detachment mechanism consists of two anti-detachment screws, which are threadedly fixed in two threaded anti-detachment grooves symmetrically arranged on the upper end face of the slide rail at the end away from the fixed support.

[0010] The beneficial effects of the present invention are: the installation and disassembly device of the present invention is suitable for rapid installation and disassembly of a large number of bushings, the force is uniform during installation and disassembly, there is no phenomenon of skewing during installation and reinstallation after bushing removal, the assembly quality is high, the parts holes are not damaged during disassembly, and the installation and disassembly efficiency is high. Attached Figure Description

[0011] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0012] Figure 2 This is a front sectional view of the present invention;

[0013] Figure 3 for Figure 2 AA section view;

[0014] Figure 4 This is a three-dimensional structural diagram of the slide rail in this invention;

[0015] Figure 5 This is a three-dimensional structural diagram of the fixed support in this invention;

[0016] Figure 6 This is a schematic diagram of the three-dimensional structure of the slider;

[0017] Figure 7 This is a three-dimensional structural diagram of the shell in this invention;

[0018] Figure 8 This is a three-dimensional structural diagram of the positioning shaft support in this invention;

[0019] Figure 9 This is a three-dimensional structural diagram of the movable base in this invention;

[0020] Figure 10 This is a three-dimensional structural diagram of the movable support in this invention;

[0021] Figure 11 This is a three-dimensional structural diagram of the adjustable support in this invention;

[0022] Figure 12 This is a three-dimensional structural diagram of the fixed shaft in this invention;

[0023] Figure 13 This is a three-dimensional structural diagram of the stop shaft in this invention;

[0024] Figure 14 This is a three-dimensional structural diagram of the sliding positioning shaft in this invention. Detailed Implementation

[0025] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0026] like Figures 1 to 14As shown, this embodiment includes a slide rail 8, a slider 10, a housing 1, a fixed support 7, a limiting screw 4, a positioning shaft support 2, a sliding positioning shaft 3, a fixed shaft 18, a reset spring 11, a movable base 12, a movable support 17, an adjustable support 16, a handle 15, an anti-detachment mechanism 9, and a stop mechanism. The slide rail 8 has a T-shaped through-slot 81 in the middle. The housing 1 has a shaped through-hole in the center, consisting of a through-hole 22 and a square groove 23 communicating with the through-hole 22. The fixed support 7 has a threaded hole 71 and a vent hole I5 in the middle of its upper end, and a light shaft 72 extends from one end face. The lower end of the slider 10 matches the T-shaped through-slot 81 of the slide rail 8, and its upper end protrudes a positioning plate 102 that matches the square groove 23 of the housing 1. A vent hole II 101 is opened in the middle of its lower end. The housing 1 and the slide rail 8 are respectively fixed to the upper and lower ends of the fixed support 7 at the end with the light shaft by fastening screws 6. The lower end of the slider 10 is slidably embedded in the T-shaped through groove 81 of the slide rail 8, and its upper end passes through the square groove 23 of the housing 1. One end of the optical shaft 72 of the fixed support 7 passes through the vent hole II 101 of the slider 10, and the reset spring 11 on the optical shaft 72 is located between the fixed support 7 and the slider 10. The limit screw 4 is threaded into the threaded hole 71 of the fixed support 7. The sliding positioning shaft 3 is a T-shaped shaft with a stepped end. The difference between the large diameter and the small diameter is the thickness of the bushing. The large diameter is the inner diameter of the part, and the small diameter is the inner diameter of the bushing. The positioning shaft support 2 has a positioning hole 201 in the center that fits with the large diameter part of the T-shaped shaft with a slight clearance, and a vent hole III 202 at the lower end. The positioning shaft support 2 is fixed to the side of the housing 1 by fastening screws 6. The sliding positioning shaft 3 is installed in the positioning hole 201 of the positioning shaft support 2, with the shaft end passing through the positioning hole 201 of the positioning shaft support 2. The cap end 31 can slide in the irregular through hole of the housing 1. The lower part of the cap end 31 contacts the protruding positioning plate 102 at the upper end of the slider 10, and the upper part of the cap end 31 is directly opposite the limiting screw 4. The movable base 12 is a convex long strip that matches the T-shaped through groove 81 of the slide rail 8. It has an exhaust hole IV 121 in the center, which is slidably embedded in the T-shaped through groove 81 of the slide rail 8. Its exhaust hole IV 121 communicates with the exhaust hole II 101 on the slider 10. A vertical through groove 172 is formed at the center of one end face of the movable support 17. A fixed shaft end receiving groove 171 is formed at the upper end of the center of the bottom wall of the vertical through groove 172. Its lower end is fixed to one end of the movable base 12 by a fastening screw 6. Threaded mounting holes 173 are provided on both sides of the movable support 173, and handles 15 are installed in the threaded mounting holes 173. An adjustable support 16 has a mounting step hole 161 for a fixed shaft 18 in its center, which is fixed in a finely adjustable position within the vertical through groove 172 of the movable support 17. Preferably, the adjustable support 16 is thinner at its four corners than in the middle, and four elongated holes 162 are formed at its four corners. Threaded holes 174 are formed on the movable support 17 at positions corresponding to the elongated holes 162 on the adjustable support 16. The adjustable support 16 and the movable support 17 are fixed together by fastening screws 6 pressed into the elongated holes 162 and the corresponding threaded holes 174.One end of the fixed shaft 18 has an inner hole 181, and the middle part 182 has a step that matches the mounting step hole 161 of the adjustable support 16. The other end 183 is threaded, passing through the mounting step hole 161 of the adjustable support 16 and being locked and fixed to the adjustable support 16 by a fastening nut 19. The end with the inner hole 181 is directly opposite the sliding positioning shaft 3 and shares the same central axis as the sliding positioning shaft 3. When assembling the bushing, the outer diameter of the end of the fixed shaft 18 with the inner hole 181 is clearance-fitted with the inner diameter of the bushing; when disassembling the inner sleeve, the inner diameter of the end of the fixed shaft 18 with the inner hole 181 is larger than the inner diameter of the part, and the outer diameter of this end is smaller than the outer shape of the part. An anti-detachment mechanism 9 of the movable support 17 is fixed on the upper surface of the slide rail 8 at the end away from the fixed support 7. Preferably, the anti-detachment mechanism 9 consists of two anti-detachment screws, which are threadedly fixed in two threaded anti-detachment grooves 84 symmetrically arranged on the upper surface of the slide rail 8 at the end away from the fixed support 7. A stop mechanism with a movable base 12 is installed on both side walls of the slide rail 8 at the end away from the fixed support 7. Preferably, the stop mechanism includes a stop shaft 20, a stop spring 21, a limit bolt 14, and a stop handle 13. Symmetrical irregular holes are formed on both side walls of the slide rail 8 at the end away from the fixed support 7. The inner end of each irregular hole is a square groove 83, and the outer end is a threaded hole 82 that matches the limit bolt 14. The stop shaft 20 is divided into two parts by a large-diameter convex ring in the middle. The inner part is square and matches the square groove 83 on the side wall of the slide rail 8. The outer part matches the inner hole of the limit bolt 14 and the end of this part is threaded. The stop shaft 20 is inserted into the square groove 83 of the slide rail 8, passes through the inner hole of the limit bolt 14, and is threaded into the threaded groove of the stop handle 13. The limit bolt 14 is tightened into the threaded hole on the side wall of the slide rail 8. A stop spring 21 is provided between the convex ring of the stop shaft 20 and the boss in the inner hole of the limit bolt 14 and is sleeved on the stop shaft 20. When stopped, the square side of the stop shaft 20 near the fixed support 7 contacts the end face of the movable base 12 near the anti-detachment mechanism 9.

[0027] When used for bushing installation, the device operates as follows:

[0028] Under normal conditions, the right end face of the movable support 17 is in contact with the outer circle of the anti-detachment mechanism 9, the right end face of the slider 10 is in contact with the left end face of the movable base 12, the stop spring is in a compressed state, and the reset spring 11 is in a slightly compressed state. Through the positioning plate 102 on the slider 10, the stepped end face of the sliding positioning shaft 3 is in contact with the end face of the positioning shaft support 2, and the sliding positioning shaft 3 protrudes from the other end face of the positioning shaft support 2.

[0029] 2. Apply a pushing force through the handles 15 on both sides of the movable support 17 to make the movable base 12 slide forward along the slide rail 8, start compressing the reset spring 11, and start venting through the vent holes on the slider 10 and the movable base 12. Continue to apply the pushing force, and drive the slider 10 to move to the left for a certain distance. Then, the end face of the sliding positioning shaft 3 and the end face of the fixed shaft 18 come into contact. At this time, the stop spring is still in a compressed state.

[0030] 3. Continue to apply the thrust, the reset spring 11 is compressed, the slider 10 continues to move to the left, the side of the movable base 12 no longer contacts the end face of the stop shaft 20, the stop spring 21 springs back, the end face of the stop shaft 20 protrudes from the T-groove surface 81 of the slide rail 8, continue to apply the thrust, the slider continues to move to the left, under the action of the fixed shaft 18, the sliding positioning shaft 3 moves to the left along the inner hole of the housing 1, the bushing is gradually pressed into the inner hole of the part until the two ends of the shoulder bushing contact the adjustable support and the end face of the part respectively (for the smooth bushing, it is necessary to reach the point where one end face of the bushing and the end face of the part contact the end face of the adjustable support respectively), the sliding positioning shaft continues to move to the left under the action of inertia until it contacts the end face of the limit screw.

[0031] 4. After holding for a few seconds, no further pushing force is applied. Under the action of the reset spring 11, the slider 10 and the movable base 12 move to the right until the end face of the movable base 12 near the anti-detachment mechanism 9 contacts the square side of the stop shaft 20 near the fixed support 7. At this time, the slider 10 is no longer in contact with the sliding positioning shaft 3, the parts and bushing assembly disengage from the fixed shaft 18, the entire device stops moving, and the assembly is removed.

[0032] 5. Pull the stop handles 13 on both sides, the stop spring 21 is compressed, the stop shaft 20 retracts, and the end face of the stop shaft 20 contacts the side of the movable base 12. Under the action of the reset spring 11, the slider 10 drives the sliding positioning shaft 3, the movable base 12 and the movable support 17 to move to the right together. The exhaust hole on the positioning shaft support 2 starts to exhaust air, and the exhaust hole on the fixed support 7 takes in air until the end face of the sliding positioning shaft 3 contacts the end face of the positioning shaft support 2 and the end face of the movable support 17 contacts the outer circle of the anti-detachment mechanism 9. The whole process is completed.

[0033] Bushing installation process: The operator inserts the sliding positioning shaft 3 into the hole of the part to be pressed, removes the bushing from the liquid nitrogen, inserts it into the fixed shaft 18, holds the handles 15 on both sides, applies force evenly, and pushes the slider 10, sliding positioning shaft 3, movable base 12 and movable support 17 until the bushing is fully pressed in. After holding for a few seconds, no more force is applied. After the bushing is removed from the liquid nitrogen, it is at room temperature. As the temperature rises, the shape expands. The outer circle of the bushing expands into the hole of the part. Under the action of the return spring 11, the sliding positioning shaft 3 and fixed shaft 18 separate from the part and bushing assembly. The assembly is removed, and the stop handles 13 on both sides are pulled. The slider 10, sliding positioning shaft 3, movable base 12 and movable support 17 return to their initial positions under the action of the return spring 11 and inertia. The above operation is repeated to complete the installation of a large number of bushings.

[0034] When using this device for bushing removal, the stop mechanism needs to be removed, a suitable fixed shaft 18 replaced, and the limit screw 4 adjusted so that it contacts the end face of the sliding positioning shaft 3. All other components remain unchanged. The entire movement process of the device is as follows:

[0035] Insert the part and bushing assembly into the outer circle of the sliding positioning shaft 3 with the smaller diameter. Apply a pushing force through the handles 15 on both sides of the movable support 17. The movable base 12 drives the slider 10 to move to the left, compressing the reset spring 11. The large end face of the fixed shaft 18 contacts one end face of the part, and one end face of the bushing contacts the stepped surface of the sliding positioning shaft 3 with the smaller diameter. Continue to apply a pushing force. The bushing remains at the outer circle of the sliding positioning shaft 3 with the smaller diameter. The part continues to move to the left under the push of the fixed shaft 18 until the other end face of the part contacts the end face of the positioning shaft support (2). No more pushing force is applied. The slider 10, movable base 12, and movable support 17 move to the right under the action of the reset spring 11 until the positioning plate 102 protruding at the upper end of the slider 10 contacts the end face of the sliding positioning shaft 3 and the end face of the movable support 17 contacts the outer circle of the anti-loosening screw. Remove the part and bushing, and the disassembly process is completed.

[0036] Of course, there are other embodiments of the present invention. Without departing from the spirit and essence of the present invention, those skilled in the art can make corresponding changes and modifications according to the present invention. However, these corresponding changes and modifications should all be considered improvements of equivalent technology and fall within the protection scope of the claims of the present invention.

Claims

1. A device for installing and removing an inner bushing of a component, characterized in that: Includes slide rail (8), slider (10), housing (1), fixed support (7), limit screw (4), positioning shaft support (2), sliding positioning shaft (3), fixed shaft (18), reset spring (11), movable base (12), movable support (17), adjustable support (16), handle (15), anti-detachment mechanism (9), and stop mechanism; The slide rail (8) has a T-shaped through groove (81) in the middle; the housing (1) has an irregular through hole in the center, which is composed of a through hole (22) and a square groove (23) that communicates with the through hole (22); the upper end of the fixed support (7) has a threaded hole (71) and an exhaust hole I (5) in the middle, and an optical shaft (72) extends out from one end face; the lower end of the slider (10) matches the T-shaped through groove (81) of the slide rail (8), and the upper end of the slider (10) has a positioning plate (102) that matches the square groove (23) of the housing (1), and the lower end of the slider (10) has an exhaust hole II (101) in the middle; the housing (1) and the slide rail (8) are respectively fixed to the upper and lower ends of the fixed support (7) with the optical shaft. The lower end of the slider (10) is slidably embedded in the T-shaped through groove (81) of the slide rail (8), and its upper end passes through the square groove (23) of the housing (1); one end of the optical shaft (72) of the fixed support (7) passes through the exhaust hole II (101) of the slider (10), and the reset spring (11) on the optical shaft (72) is located between the fixed support (7) and the slider (10); the limit screw (4) is threaded into the threaded hole (71) of the fixed support (7); the sliding positioning shaft (3) is a T-shaped shaft with a stepped shaft end, the difference between the large diameter and the small diameter is the thickness of the bushing, the large diameter is the inner diameter of the part, and the small diameter is the inner diameter of the bushing; the positioning shaft support (2) has a center opening There is a positioning hole (201) that fits with the large diameter part of the T-shaped shaft with a micro-clear clearance, and an exhaust hole III (202) is opened at the lower end; the positioning shaft support (2) is fixed on the side of the housing (1), and the sliding positioning shaft (3) is slidably installed in the positioning hole (201) of the positioning shaft support (2), with the shaft end passing through the positioning hole (201) of the positioning shaft support (2), and the cap end (31) can slide in the irregular through hole of the housing (1). The lower part of the cap end (31) contacts the positioning plate (102) protruding at the upper end of the slider (10), and the upper part of the cap end (31) is directly opposite the limit screw (4); the movable base (12) is a convex long strip block that matches the T-shaped through groove (81) of the slide rail (8), in which The center of the movable support (17) has an exhaust hole IV (121), which is slidably embedded in the T-shaped through groove (81) of the slide rail (8), and the exhaust hole IV (121) communicates with the exhaust hole II (101) on the slider (10); the center of one end face of the movable support (17) has a vertical through groove (172), the upper end of the bottom wall of the vertical through groove (172) has a fixed shaft end receiving groove (171), the lower end of which is fixed to one end of the movable base (12), and handles (15) are installed on both sides of it; the center of the adjustable support (16) has a mounting step hole (161) for the fixed shaft (18), which is fixed in the vertical through groove (172) of the movable support (17) with a fine adjustment position;The fixed shaft (18) has an inner hole (181) at one end and a step in the middle that matches the mounting step hole (161) of the adjustable support (16). The other end is threaded, passes through the mounting step hole (161) of the adjustable support (16), and is locked and fixed to the adjustable support (16) by a fastening nut (19). The end with the inner hole (181) faces the sliding positioning shaft (3) and shares the same central axis with the sliding positioning shaft (3). When assembling the bushing, the fixed shaft (18) The outer diameter of the end with the inner hole (181) is clearance-fitted with the inner diameter of the bushing; when disassembling the inner sleeve, the inner diameter of the end of the fixed shaft (18) with the inner hole (181) is larger than the inner diameter of the part, and the outer diameter of this end is smaller than the outer shape of the part; a movable support (17) anti-detachment mechanism (9) is fixed on the upper surface of the slide rail (8) at the end away from the fixed support (7); a movable base (12) stop mechanism is installed on both side walls of the slide rail (8) at the end away from the fixed support (7).

2. The device for installing and removing the inner hole bushing of a part according to claim 1, characterized in that: The stopping mechanism includes a stop shaft (20), a stop spring (21), a limit bolt (14), and a stop handle (13). Symmetrical irregular holes are formed on both sides of the slide rail (8) at the end furthest from the fixed support (7). The inner end of each irregular hole is a square groove (83), the middle is a smooth hole, and the outer end is a threaded hole (82) that matches the limit bolt (14). The stop shaft (20) is divided into two parts by a large-diameter convex ring in the middle. The inner part is a square groove (83) that matches the square groove (83) on the side wall of the slide rail (8), and the outer part is a threaded hole (82) that matches the inner groove (83) on the side wall of the limit bolt (14). The holes match and the end of the part is threaded; the stop shaft (20) is inserted into the square groove (83) of the slide rail (8), passes through the inner hole of the limit bolt (14), and is threaded into the threaded groove of the stop handle (13); the limit bolt (14) is tightened into the threaded hole on the side wall of the slide rail (8), and a stop spring (21) is provided between the convex ring of the stop shaft (20) and the inner end face of the limit bolt (14) and sleeved on the stop shaft (20); when stopped, the square side of the stop shaft (20) near the fixed support 7 contacts the end face of the movable base 12 near the anti-detachment mechanism 9.

3. The device for installing and removing the inner hole bushing of a part according to claim 1 or 2, characterized in that: The adjustable support (16) is fixed in a vertical through groove (172) of the movable support (17) with its position adjustable. The specific structure is as follows: the four corners of the adjustable support (16) are thinner than the middle part, and four elongated holes (162) are opened on the four corners. The movable support (17) has threaded holes (174) at the positions corresponding to the elongated holes (162) on the adjustable support (16). The adjustable support (16) and the movable support (17) are fixed together by fastening screws (6) that are pressed and fixed on the elongated holes (162) and the corresponding threaded holes (174).

4. The device for installing and removing the inner bushing of a part according to claim 3, characterized in that: The anti-detachment mechanism (9) consists of two anti-detachment screws, which are threadedly fixed in two threaded anti-detachment grooves (84) symmetrically arranged on the upper end face of the slide rail (8) at the end away from the fixed support (7).

5. The device for installing and removing the inner hole bushing of a part according to claim 1 or 2, characterized in that: The anti-detachment mechanism (9) consists of two anti-detachment screws, which are threadedly fixed in two threaded anti-detachment grooves (84) symmetrically arranged on the upper end face of the slide rail (8) at the end away from the fixed support (7).

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