A mobile workbench wear-resistant sleeve automatic dismounting device and a use method thereof

Abstract

The application provides a kind of mobile workstation wear-resistant sleeve automatic dismounting device and its using method, belong to mechanical equipment maintenance frock technical field, including jack, pump station and mobile base;Pump station is located on mobile base, jack is placed on the upper surface of workstation table board;Jack is connected with pulling execution unit, and jack is connected with pump station by hose;Pulling execution unit includes supporting plate, jackscrew and pull rod, supporting plate is connected with jack, jackscrew is worn on supporting plate;Pull rod is connected with jackscrew by hinged assembly, and compression spring is arranged between pull rod and jackscrew.The application realizes non-destructive automatic dismounting of wear-resistant sleeve through jack and retractable pull rod structure, discards traditional destructive dismounting mode, avoids workpiece damage;Collaborate movable base and adjustable, detachable structure, strong adaptability, on-site maintenance is convenient, cooperate spring automatic reset, greatly reduce labor intensity and maintenance cost, significantly improve equipment maintenance efficiency and operation stability.

Description

Technical Field

[0001] This invention relates to the field of mechanical equipment maintenance tooling technology, and in particular to an automatic disassembly device for the wear-resistant sleeve of a mobile workbench and its usage method. Background Technology

[0002] Wear-resistant sleeves are core vulnerable parts of the mobile worktable. They are assembled with the worktable plate using an interference fit. During equipment operation, they are prone to wear and jamming due to continuous friction from the top material rod and the obstruction of waste materials, requiring timely disassembly and repair.

[0003] Existing wear-resistant sleeve disassembly and assembly technologies have significant shortcomings. For example, Chinese patent CN220389297U discloses a tooling for disassembling wear-resistant sleeves of screw compressors, which uses a manual threaded pull drive and lacks an automatic hydraulic power structure. This results in high labor intensity and low disassembly efficiency due to manual force application. Furthermore, its split sleeve clamping structure causes uneven force distribution, easily damaging the wear-resistant sleeve and the workpiece, making non-destructive disassembly impossible, and it lacks a moving and positioning mechanism and an elastic reset mechanism. Another example is Chinese patent CN209717574U, which discloses a tooling for installing wear-resistant sleeves inside the main drive of a hard rock tunneling machine. This tooling only provides installation support and limiting functions, lacking a disassembly and extraction structure, making it unsuitable for disassembly operations. It also lacks a hydraulic drive, elastic reset mechanism, and moving mechanism, limiting its applicability.

[0004] Traditional disassembly methods often employ destructive techniques such as cutting, which are cumbersome, easily damage the worktable, and result in non-reusable wear sleeves, leading to high maintenance costs. In summary, neither existing tooling nor traditional methods can achieve automated, smooth, and non-destructive disassembly, resulting in insufficient convenience and continuity of on-site maintenance. Therefore, the industry urgently needs to develop an automated, non-destructive, flexible, and multi-specification wear sleeve disassembly tooling. Summary of the Invention

[0005] The purpose of this invention is to overcome the technical defects of existing technologies, such as low disassembly efficiency, difficulty in achieving non-destructive disassembly, and poor adaptability, and to provide an automatic disassembly device for wear-resistant sleeves of a mobile workbench and its usage method.

[0006] In a first aspect, the present invention provides an automatic disassembly device for wear-resistant sleeves on a mobile workbench to solve the above-mentioned technical problems, comprising jacks, a pump station, and a mobile base; the pump station is disposed on the mobile base, and multiple jacks are disposed on the upper surface of the workbench plate and evenly distributed along the circumference of the fitting holes of the wear-resistant sleeve; the piston rods of the multiple jacks are connected to a common extraction execution unit, and the multiple jacks are respectively connected to the pump station through hoses; the extraction execution unit includes a support plate, a push rod, and a pull rod, and the support plate is connected to the piston rod of the jack. Next, the top rod passes through the support plate, and the bottom of the top rod can extend to the bottom of the wear-resistant sleeve. Multiple pull rods are provided, and the multiple pull rods are evenly distributed along the circumference of the top rod. The bottom of the top rod is provided with multiple hinge components that cooperate with the pull rods one by one. The pull rods are connected to the top rods through the hinge components. A compression spring is provided between the pull rods and the top rods. The two ends of the compression springs are respectively connected to the pull rods and the top rods. The pull rods can retract under the elastic force of the compression springs and pass into the inner hole of the wear-resistant sleeve. After the pull rods are unfolded, they can abut against the lower end face of the wear-resistant sleeve.

[0007] This invention uses a mobile base as the overall load-bearing structure and a pump station as the hydraulic power source. Multiple jacks are evenly arranged on the worktable along the circumference of the wear-resistant sleeve fitting holes and are connected to the pump station via hoses to achieve synchronous oil supply. The piston rod of the jack drives the support plate to drive the action of the extraction execution unit. The push rod passes through the support plate and extends to the bottom of the wear-resistant sleeve. The extraction rod is movably connected to the push rod through a hinge assembly. Under the action of the compression spring, it retracts and passes into the inner hole of the wear-resistant sleeve. After unfolding, it presses against the lower end face of the wear-resistant sleeve. Finally, the wear-resistant sleeve is extracted by lifting it with the jack.

[0008] This invention differs from existing manual disassembly fixtures and fixtures that only have installation functions. It achieves hydraulic automatic disassembly without the need for manual force; the force applied during extraction is uniform and without impact, completely avoiding traditional destructive disassembly methods such as cutting, and achieving non-destructive disassembly of the wear-resistant sleeve from the worktable, perfectly adapting to the disassembly requirements of interference fit wear-resistant sleeves.

[0009] A further improvement of the present invention is that, when the pull rod is in the retracted state, the overall radial profile of the pull rod and the push rod is smaller than the inner diameter of the wear-resistant sleeve; and when the pull rod is in the extended state, the upper surface of the pull rod and the lower end face of the wear-resistant sleeve can be completely fitted together.

[0010] The present invention, through the above design, can prevent the inner wall of the wear-resistant sleeve from being scratched when the pull rod is inserted, and can also make the pulling force evenly transmitted, solving the problem of uneven force distribution of existing tooling that easily damages the workpiece, and further enhancing the effect of non-destructive disassembly.

[0011] A further improvement of the present invention is that, when the lever is in the extended state, the lever can maintain a horizontal state during the pulling process under the limiting action of the hinge assembly and the tensioning action of the compression spring.

[0012] The present invention, through the above design, can avoid force deviation caused by the tilting of the pull rod, ensure that the pulling force acts vertically and stably on the wear-resistant sleeve, prevent damage to the worktable, and improve the stability and safety of the disassembly process.

[0013] A further improvement of the present invention is that two jacks are provided, and the two jacks are symmetrically distributed on both sides of the jack rod.

[0014] This invention eliminates the hidden danger of uneven load during lifting through a symmetrical force design, making the pallet lifting and lowering more stable, avoiding the wear-resistant sleeve from jamming and deformation, and improving the operational reliability of the automatic disassembly device.

[0015] A further improvement of the present invention is that there are two pull rods, which are symmetrically distributed on both sides of the top rod.

[0016] The present invention, through the above design, enables the wear-resistant sleeve to be subjected to balanced circumferential force, and there is no deviation or shaking during the removal process, ensuring that the wear-resistant sleeve is intact and reusable, thereby reducing equipment maintenance costs.

[0017] A further improvement of the present invention is that the mobile base includes a base plate, casters and a handle, the casters are installed on the bottom of the base plate, the handle is fixed to one end of the base plate, and the pump station is fixedly installed on the other end of the base plate.

[0018] This invention differs from existing tooling without a moving mechanism, allowing for quick on-site placement without the need for manual handling of the tooling, thus significantly improving the on-site maintenance efficiency of the mobile workbench.

[0019] A further improvement of the present invention is that one end of the compression spring is provided with a lifting ring, the lifting ring being detachably fixed to the side wall of the top rod by screws, and the other end of the compression spring is connected to the side wall of the pull rod.

[0020] This invention features a detachable lifting ring design that facilitates spring replacement and adaptability to different specifications of pull rods, enhancing the versatility of the device while simplifying tooling maintenance and extending its service life.

[0021] A further improvement of the present invention is that the hinge assembly includes a support and a pin, the support is fixed to the side wall at the bottom of the top rod, and one end of the pull rod is connected to the support via the pin.

[0022] The hinge structure used in this invention is simple and reliable, ensuring smooth and unobstructed retraction and unfolding of the lever, reducing the probability of device failure and improving structural stability.

[0023] A further improvement of the present invention is that the push rod slides through the support plate, and a nut that can fix its sliding position is screwed to the top of the push rod.

[0024] The present invention, through the above design, can be adapted to the disassembly of wear-resistant sleeves of different depths, with precise positioning and simple operation, solving the problem of poor adaptability of existing tooling and expanding the application scenarios.

[0025] Secondly, the present invention also provides a method for using an automatic disassembly device for a wear-resistant sleeve on a mobile workbench, comprising the following steps: S1. Push the movable base to move the disassembly device to the disassembly position on the worktable, so that the top rod is coaxially aligned with the inner hole of the wear-resistant sleeve; S2. Slide the top rod downwards, and the pull rod retracts under the elastic force of the compression spring, and passes through the inner hole of the wear-resistant sleeve along with the top rod until the pull rod extends to below the lower end face of the wear-resistant sleeve; S3. The lever automatically unfolds under the limiting action of the compression spring and the hinge assembly. The upper surface of the lever abuts against the lower end face of the wear-resistant sleeve. Tighten the nut at the top of the top rod to fix the relative position of the top rod and the support plate. S4. Start the pump station to supply oil to the jack. The jack lifts and drives the support plate, the push rod and the pull rod to move upward synchronously, so as to smoothly pull out the wear-resistant sleeve. S5. After the wear-resistant sleeve is disassembled, the pump station is controlled to unload the jack, and the push rod and pull rod return to their initial state under the elastic reset action of the strong compression spring.

[0026] In step S1, the device is quickly moved to the disassembly position on the worktable by moving the base, ensuring that the push rod and the inner hole of the wear-resistant sleeve are coaxial, laying the foundation for smooth disassembly; in step S2, the push rod is slid downward, and the pull rod automatically retracts and inserts into the inner hole under the elastic force of the compression spring until it extends out of the lower end face of the wear-resistant sleeve; in step S3, the pull rod automatically unfolds and presses against the wear-resistant sleeve under the limit of the hinge assembly, and the nut is tightened to fix the relative position of the push rod and the support plate; in step S4, the pump station is started to supply oil, and the jack lifts and drives the entire wear-resistant sleeve to be removed; in step S5, the pump station is unloaded, and the push rod and pull rod return to their original positions under the elastic reset action of the compression spring.

[0027] This invention automates the entire process, eliminating the need for manual force application and minimizing labor intensity. Compared to traditional destructive disassembly and manual thread pulling, it enables the non-destructive disassembly and reuse of wear-resistant sleeves, significantly improving maintenance efficiency and perfectly meeting the needs of rapid on-site maintenance on mobile workbenches.

[0028] As can be seen from the above technical solutions, the beneficial effects of the present invention are: 1. This invention employs a hydraulic pump station and multiple jacks for synchronous drive, enabling automatic hydraulic extraction of wear-resistant sleeves. This replaces traditional manual pulling and destructive cutting methods, eliminating the need for manual force throughout the process and significantly reducing labor intensity. The stable and uniform axial pulling force allows for the non-destructive disassembly of interference-fit wear-resistant sleeves, preventing damage to the worktable and the sleeves, and ensuring the structural integrity of the equipment.

[0029] 2. This invention is equipped with a retractable and expandable pull rod and a movable base. The pull rod can smoothly insert into the inner hole and firmly abut against the wear-resistant sleeve. The symmetrical force design prevents swaying during extraction due to uneven load. The movable base can be quickly positioned on-site. Combined with the adjustable push rod and detachable spring structure, it can adapt to wear-resistant sleeves of different specifications and depths, greatly improving versatility and ease of maintenance.

[0030] 3. This invention utilizes a compression spring that combines retraction, clamping, and elastic reset functions, allowing for quick repositioning of the tooling after disassembly and improving operational continuity. The wear-resistant sleeve, which can be disassembled without damage, can be reused, significantly reducing maintenance costs. The overall structure is simple and reliable, easy to operate, and effectively improves the maintenance efficiency of the mobile workbench and the operational stability of the equipment. Attached Figure Description

[0031] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a structural schematic diagram of a specific embodiment of the present invention.

[0033] Figure 2 yes Figure 1 A magnified view of part A in the middle.

[0034] Figure 3 This is a demonstration diagram of the pulling-out process in a specific embodiment of the present invention.

[0035] In the diagram: 1. Support plate; 2. Top rod; 3. Jack; 4. Workbench; 5. Wear-resistant sleeve; 6. Pulling rod; 7. Lifting ring; 8. Compression spring; 9. Support; 10. Pump station; 11. Hoses; 12. Pin; 13. Nut; 14. Handle; 15. Base plate; 16. Casters. Detailed Implementation

[0036] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0037] Example 1: Refer to Figure 1-3This embodiment provides an automatic disassembly device for wear-resistant sleeves on a mobile workbench, including jacks 3, a pump station 10, and a mobile base. The pump station 10 is disposed on the mobile base. Multiple jacks 3 are disposed on the upper surface of the workbench 4 and are evenly distributed circumferentially along the assembly holes of the wear-resistant sleeve 5. The piston rods of the multiple jacks 3 are connected to a common extraction execution unit, and the multiple jacks 3 are respectively connected to the pump station 10 through hoses 11. The extraction execution unit includes a support plate 1, a push rod 2, and a pull rod 6. The support plate 1 is connected to the piston rod of the jack 3, and the push rod 2... The top rod 2, which is mounted on the support plate 1, extends to the bottom of the wear-resistant sleeve 5. Multiple pull rods 6 are provided, evenly distributed around the top rod 2. The bottom of the top rod 2 has multiple hinge components that mate with each pull rod 6. The pull rod 6 is connected to the top rod 2 via these hinge components. A compression spring 8 is provided between the pull rod 6 and the top rod 2, with both ends connected to the pull rod 6 and the top rod 2 respectively. The pull rod 6 can retract under the elastic force of the compression spring 8 and penetrate into the inner hole of the wear-resistant sleeve 5. When unfolded, the pull rod 6 abuts against the lower end face of the wear-resistant sleeve 5.

[0038] This invention uses a mobile base as the overall load-bearing structure, a pump station 10 as the hydraulic power source, and multiple jacks 3 are evenly arranged on the workbench 4 along the circumference of the assembly holes of the wear-resistant sleeve 5. They are connected to the pump station 10 via hoses 11 to achieve synchronous oil supply. The piston rod of the jack 3 drives the support plate 1 to drive the action of the extraction execution unit. The push rod 2 passes through the support plate 1 and extends to the bottom of the wear-resistant sleeve 5. The extraction rod 6 is movably connected to the push rod 2 through a hinge assembly. Under the action of the compression spring 8, it retracts and passes into the inner hole of the wear-resistant sleeve 5. After unfolding, it presses against the lower end face of the wear-resistant sleeve 5. Finally, the wear-resistant sleeve 5 is extracted by lifting it with the jack 3.

[0039] This invention differs from existing manual disassembly fixtures and fixtures that only have installation functions. It realizes hydraulic automatic disassembly without the need for manual force; the force applied during extraction is uniform and without impact, completely avoiding traditional destructive disassembly methods such as cutting, and realizing non-destructive disassembly of the wear-resistant sleeve 5 and the worktable 4, perfectly adapting to the disassembly requirements of the interference fit wear-resistant sleeve.

[0040] Specifically, refer to Figure 2 When the pull rod 6 is in the retracted state, the overall radial profile of the pull rod 6 and the top rod 2 is smaller than the inner diameter of the wear-resistant sleeve 5; when the pull rod 6 is in the extended state, the upper surface of the pull rod 6 and the lower end face of the wear-resistant sleeve 5 can be completely fitted together.

[0041] When the pull rod 6 is in the retracted state, its overall radial profile with the top rod 2 is smaller than the inner diameter of the wear-resistant sleeve 5, ensuring that the pull rod 6 can smoothly pass into the inner hole; after the pull rod 6 is unfolded, its upper surface is completely in contact with the lower end face of the wear-resistant sleeve 5, maximizing the support contact area.

[0042] The present invention, through the above design, can prevent the pull rod 6 from scratching the inner wall of the wear-resistant sleeve 5 when it is inserted, and can also make the pulling force evenly transmitted, solving the problem of uneven force distribution of existing tooling that easily damages the workpiece, and further enhancing the effect of non-destructive disassembly.

[0043] Specifically, refer to Figure 3 When the lever 6 is in the extended state, it can maintain a horizontal state during the pulling process under the limiting action of the hinge assembly and the tensioning action of the compression spring 8.

[0044] After the lever 6 is extended, it remains horizontal throughout the entire process of removing the wear-resistant sleeve 5 under the limiting constraint of the hinge assembly and the tension of the compression spring 8.

[0045] The present invention, through the above design, can avoid the force shift caused by the tilt of the pull rod 6, ensure that the pulling force acts vertically and stably on the wear-resistant sleeve 5, prevent damage to the worktable 4, and improve the stability and safety of the disassembly process.

[0046] Specifically, refer to Figure 1 and 3 There are two jacks 3, which are symmetrically distributed on both sides of the top rod 2.

[0047] Two jacks 3 are symmetrically distributed on both sides of the jack rod 2, and the two jacks 3 lift the support plate 1 simultaneously.

[0048] This invention eliminates the hidden danger of uneven load during lifting through symmetrical force design, making the lifting of the pallet 1 more stable, avoiding the jamming and deformation of the wear-resistant sleeve 5, and improving the operational reliability of the automatic disassembly device.

[0049] Specifically, refer to Figure 1 and 3 There are two levers 6, which are symmetrically distributed on both sides of the top rod 2.

[0050] Two levers 6 are symmetrically distributed on both sides of the top rod 2, and after unfolding, they symmetrically support the lower end face of the wear-resistant sleeve 5.

[0051] The present invention, through the above design, can ensure that the wear-resistant sleeve 5 is subjected to balanced force in the circumference, and there is no deviation or shaking during the removal process, thus ensuring that the wear-resistant sleeve 5 is intact and reusable, and reducing equipment maintenance costs.

[0052] Specifically, refer to Figure 1 and 3 The mobile base includes a base plate 15, casters 16 and handle 14. The casters 16 are installed on the bottom of the base plate 15, the handle 14 is fixed to one end of the base plate 15, and the pump station 10 is fixedly installed on the other end of the base plate 15.

[0053] The mobile base consists of a base plate 15, casters 16 and handles 14. The casters 16 enable the device to move freely, and the handles 14 facilitate manual pushing. The pump station 10 is fixedly installed on the base plate 15 to form a whole.

[0054] This invention differs from existing tooling without a moving mechanism, allowing for quick on-site placement without the need for manual handling of the tooling, thus significantly improving the on-site maintenance efficiency of the mobile workbench.

[0055] Specifically, refer to Figure 2 One end of the compression spring 8 is provided with a lifting ring 7, which is detachably fixed to the side wall of the top rod 2 by screws, and the other end of the compression spring 8 is connected to the side wall of the pull rod 6.

[0056] One end of the compression spring 8 is detachably fixed to the side wall of the top rod 2 via the lifting ring 7 and screws, and the other end is connected to the side wall of the pull rod 6, so as to realize the detachable assembly of the spring.

[0057] The present invention features a detachable lifting ring 7, which facilitates the replacement of springs and adapts to different specifications of pull rods 6, enhancing the versatility of the device, while simplifying the tooling maintenance process and extending its service life.

[0058] Specifically, refer to Figure 2 The hinge assembly includes a support 9 and a pin 12. The support 9 is fixed to the side wall at the bottom of the top rod 2, and one end of the pull rod 6 is connected to the support 9 through the pin 12.

[0059] The hinge assembly consists of a support 9 and a pin 12. The support 9 is fixed to the bottom side wall of the top rod 2, and the pull rod 6 is hinged to the support 9 through the pin 12, so as to realize the free rotation of the pull rod 6.

[0060] The hinge structure used in this invention is simple and reliable, ensuring smooth and unobstructed retraction and unfolding of the lever 6, reducing the probability of device failure and improving structural stability.

[0061] Specifically, refer to Figure 1 and 3 The top rod 2 slides through the support plate 1, and a nut 13 is screwed to the top of the top rod 2 to fix its sliding position.

[0062] The top rod 2 slides through the support plate 1, and the depth of its insertion into the wear-resistant sleeve 5 can be freely adjusted. The top nut 13 is screwed to fix the relative sliding position of the top rod 2 and the support plate 1.

[0063] The present invention, through the above design, can be adapted to the disassembly of wear-resistant sleeves 5 of different depths, with precise positioning and simple operation, solving the problem of poor adaptability of existing tooling and expanding the application scenarios.

[0064] Example 2: Based on Example 1, this example provides a method for using an automatic disassembly device for the wear-resistant sleeve of a mobile workbench, including the following steps: S1. Push the movable base to move the disassembly device to the disassembly position on the workbench 4, so that the top rod 2 and the inner hole of the wear-resistant sleeve 5 are coaxially aligned; S2. Slide the top rod 2 downwards, and the pull rod 6 retracts under the elastic force of the compression spring 8, and enters the inner hole of the wear-resistant sleeve 5 along with the top rod 2 until the pull rod 6 extends to below the lower end face of the wear-resistant sleeve 5; S3. The pull rod 6 automatically unfolds under the limiting action of the compression spring 8 and the hinge assembly. The upper surface of the pull rod 6 abuts against the lower end face of the wear-resistant sleeve 5. The nut 13 at the top of the top rod 2 is tightened to fix the relative position of the top rod 2 and the support plate 1. S4. Start the pump station 10 to supply oil to the jack 3. The jack 3 lifts and drives the support plate 1, the push rod 2 and the pull rod 6 to move upward synchronously, and smoothly pull out the wear-resistant sleeve 5. S5. After the wear-resistant sleeve 5 is disassembled, the pump station 10 is controlled to unload the jack 3, and the push rod 2 and the pull rod 6 return to their initial state under the elastic reset action of the powerful compression spring 8.

[0065] In step S1, the device is quickly moved to the disassembly position on the workbench 4 by moving the base, ensuring that the push rod 2 and the inner hole of the wear-resistant sleeve 5 are coaxial, laying the foundation for smooth disassembly; in step S2, the push rod 2 is slid downward, and the pull rod 6 automatically retracts and enters the inner hole under the elastic force of the compression spring 8 until it extends out of the lower end face of the wear-resistant sleeve 5; in step S3, the pull rod 6 automatically unfolds and presses against the wear-resistant sleeve 5 under the limit of the hinge assembly, and the nut 13 is tightened to fix the relative position of the push rod 2 and the support plate 1; in step S4, the pump station 10 is started to supply oil, and the jack 3 lifts and drives the entire wear-resistant sleeve 5 to be removed; in step S5, the pump station 10 is unloaded, and the push rod 2 and the pull rod 6 return to their positions under the elastic reset action of the compression spring 8.

[0066] This invention automates the entire process, eliminating the need for manual force application and minimizing labor intensity. Compared to traditional destructive disassembly and manual thread pulling, it enables the non-destructive disassembly and reuse of the wear-resistant sleeve 5, significantly improving maintenance efficiency and perfectly meeting the needs of rapid on-site maintenance on a mobile workbench.

[0067] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An automatic disassembly device for wear-resistant sleeves on a mobile workbench, comprising a jack (3), a pump station (10), and a mobile base, characterized in that, The pump station (10) is mounted on a mobile base. Multiple jacks (3) are provided, and the multiple jacks (3) are placed on the upper surface of the workbench (4) and evenly distributed around the circumference of the assembly hole of the wear-resistant sleeve (5). The piston rods of the multiple jacks (3) are connected to a pulling execution unit, and the multiple jacks (3) are respectively connected to the pump station (10) through hoses (11). The pulling execution unit includes a support plate (1), a push rod (2), and a pulling rod (6). The support plate (1) is connected to the piston rod of the jack (3), and the push rod (2) passes through the support plate (1). The bottom of the push rod (2) can extend to the wear-resistant sleeve. Below the sleeve (5), there are multiple pull rods (6), which are evenly distributed around the top rod (2). The bottom of the top rod (2) is provided with multiple hinge components that cooperate with the pull rods (6). The pull rods (6) are connected to the top rod (2) through the hinge components. A compression spring (8) is provided between the pull rod (6) and the top rod (2). The two ends of the compression spring (8) are connected to the pull rod (6) and the top rod (2) respectively. The pull rod (6) can retract under the elastic force of the compression spring (8) and pass into the inner hole of the wear-resistant sleeve (5). After the pull rod (6) is unfolded, it can abut against the lower end face of the wear-resistant sleeve (5).

2. The automatic disassembly device for the wear-resistant sleeve of the mobile workbench according to claim 1, characterized in that, When the pull rod (6) is in the retracted state, the overall radial profile of the pull rod (6) and the top rod (2) is smaller than the inner diameter of the wear-resistant sleeve (5); when the pull rod (6) is in the unfolded state, the upper surface of the pull rod (6) and the lower end face of the wear-resistant sleeve (5) can fit completely together.

3. The automatic disassembly device for the wear-resistant sleeve of a mobile workbench according to claim 1, characterized in that, When the lever (6) is in the extended state, the lever (6) can maintain a horizontal state during the pulling process under the limiting action of the hinge assembly and the tensioning action of the compression spring (8).

4. The automatic disassembly device for the wear-resistant sleeve of a mobile workbench according to claim 1, characterized in that, Two jacks (3) are provided, and the two jacks (3) are symmetrically distributed on both sides of the top rod (2).

5. The automatic disassembly device for the wear-resistant sleeve of a mobile workbench according to claim 1, characterized in that, There are two levers (6), which are symmetrically distributed on both sides of the top rod (2).

6. The automatic disassembly device for the wear-resistant sleeve of a mobile workbench according to claim 1, characterized in that, The mobile base includes a base plate (15), casters (16) and a handle (14). The casters (16) are installed on the bottom of the base plate (15), the handle (14) is fixed to one end of the base plate (15), and the pump station (10) is fixedly installed on the other end of the base plate (15).

7. The automatic disassembly device for the wear-resistant sleeve of a mobile workbench according to claim 1, characterized in that, One end of the compression spring (8) is provided with a lifting ring (7), which is detachably fixed to the side wall of the top rod (2) by screws, and the other end of the compression spring (8) is connected to the side wall of the pull rod (6).

8. The automatic disassembly device for the wear-resistant sleeve of a mobile workbench according to claim 1, characterized in that, The hinge assembly includes a support (9) and a pin (12). The support (9) is fixed to the side wall at the bottom of the top rod (2). One end of the pull rod (6) is connected to the support (9) through the pin (12).

9. The automatic disassembly device for the wear-resistant sleeve of a mobile workbench according to claim 1, characterized in that, The top rod (2) slides through the support plate (1), and a nut (13) is screwed to the top of the top rod (2) to fix its sliding position.

10. According to claim 1 The method of using the automatic disassembly device for the wear-resistant sleeve of a mobile workbench as described in any one of the following nine claims is characterized in that... Includes the following steps: S1. Push the movable base to move the disassembly device to the disassembly position on the workbench (4), so that the top rod (2) and the inner hole of the wear-resistant sleeve (5) are coaxially aligned; S2. Slide the top rod (2) downwards. The pull rod (6) retracts under the elastic force of the compression spring (8) and enters the inner hole of the wear-resistant sleeve (5) along with the top rod (2) until the pull rod (6) extends to below the lower end face of the wear-resistant sleeve (5). S3. The lever (6) automatically unfolds under the limiting action of the compression spring (8) and the hinge assembly. The upper surface of the lever (6) abuts against the lower end face of the wear-resistant sleeve (5). The nut (13) at the top of the top rod (2) is tightened to fix the relative position of the top rod (2) and the support plate (1). S4. Start the pump station (10) to supply oil to the jack (3). The jack (3) lifts and drives the support plate (1), the push rod (2) and the pull rod (6) to move upward synchronously, and pull out the wear-resistant sleeve (5) smoothly. S5. After the wear-resistant sleeve (5) is disassembled, the pump station (10) is controlled to unload the jack (3), and the top rod (2) and the pull rod (6) return to their initial state under the elastic reset action of the powerful compression spring (8).

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