A tool for disassembling a pin of a five-function component of a tobacco YB45 packaging machine

Abstract

This utility model relates to the field of tobacco equipment machinery technology, and in particular to a tooling for disassembling pins of a five-function component of a tobacco YB45 packaging machine. It includes a pin remover, a shock-absorbing sleeve fitted over the remover, a bushing coaxially fitted over the shock-absorbing sleeve, and a handle detachably connected to the side wall of the bushing. The remover has a stepped shaft structure, comprising a first shaft section and a second shaft section coaxially connected. The diameter of the first shaft section is smaller than that of the second shaft section, and the end of the first shaft section has a hemispherical hole for abutting the small end of the pin. The shock-absorbing sleeve is fixedly connected to the second shaft section of the remover by a first fastener. The bushing is locked to the outer wall of the shock-absorbing sleeve by a second fastener. The handle is installed in a threaded hole on the side wall of the bushing via a threaded connector. This utility model, through its innovative hemispherical hole structure at the end of the first shaft section of the remover, effectively avoids the small end of the pin becoming too thick or bent, fundamentally preventing pin jamming during disassembly and improving maintenance efficiency.

Description

Technical Field

[0001] This utility model relates to the field of tobacco equipment machinery technology, and in particular to a tooling for disassembling the pins of the five-function components of a tobacco YB45 packaging machine. Background Technology

[0002] The five-function mechanism of the YB45 packaging machine is a key component, including a cigarette detector, a defective cigarette pack rejection mechanism, a first-wheel cigarette presser, a cigarette protection follower plate, and a first-wheel cigarette pusher plate. Among these, the defective cigarette pack rejection mechanism, the early mechanical cigarette detector, and the first-wheel cigarette presser all employ a motion mechanism composed of cylindrical cams and roller followers. The cylindrical cam mechanism involves high-pair contact, and the rollers, as easily worn parts, directly affect the accuracy of the motion pattern. Therefore, when performing specialized deep wheel maintenance on the five-function mechanism, inspecting and replacing worn rollers is a necessary maintenance step.

[0003] However, replacing the roller requires disassembling the mating cylindrical cam as well. This cylindrical cam is fixedly connected to the drive spindle via a tapered pin. Currently, when removing this pin, maintenance personnel commonly use a 10-12 pound sledgehammer with a common flat-head pin remover to knock it off. This traditional method has significant drawbacks:

[0004] 1. Uneven force transmission leading to pin deformation and jamming: The flat-head pin breaker's end face and the small end face of the tapered pin have a relatively small contact area. During forceful striking, uneven force transmission is very likely to occur. This can cause the small end of the tapered pin to become misaligned and deformed (e.g., thickened or bent). Once the small end of the pin is deformed, its fit with the pin hole will become tighter or even jam, resulting in the pin being unable to be removed normally, greatly delaying the maintenance progress and significantly reducing the efficiency of specialized equipment maintenance.

[0005] 2. High operational safety hazards: The contact area between the flat-headed pin breaker and the small end of the pin is limited. During the striking process, the head of the pin breaker is prone to slipping or jumping off. This not only damages equipment parts, but also poses a serious risk of mechanical injury to the operator, such as being hit by the hammer or being injured by the hand due to slipping and impact with the equipment.

[0006] 3. Insufficient applicability and ease of operation: The general-purpose flat-head pin remover lacks optimized design for specific pin hole sizes and working space. When operating in the relatively compact installation position of the YB45 five-function component, it is not easy to apply force stably, which further exacerbates the above risks.

[0007] Therefore, a special tooling is urgently needed to solve the problem of disassembling the pins in the five-function components of the YB45 packaging machine, so as to overcome the defects of existing general tools, such as easy deformation and jamming of pins, high operational risks and low efficiency. Utility Model Content

[0008] In order to overcome the shortcomings of the prior art, such as uneven force transmission during pin disassembly leading to pin deformation and jamming, high operational safety hazards, and insufficient applicability and ease of operation, this utility model provides a tooling for disassembling pins of the five-function components of a tobacco YB packaging machine, including: a pin remover, a shock-absorbing sleeve fitted outside the pin remover, a bushing coaxially fitted outside the shock-absorbing sleeve, and a handle detachably connected to the side wall of the bushing.

[0009] The pin-attacking device has a stepped shaft structure, comprising a first shaft section and a second shaft section coaxially connected. The diameter of the first shaft section is smaller than that of the second shaft section, and the end of the first shaft section is provided with a hemispherical hole for abutting the small end of the pin.

[0010] The shock-absorbing sleeve is fixedly connected to the second shaft section of the pin by a first fastener;

[0011] The bushing is locked and fixed to the outer wall of the shock-absorbing sleeve by a second fastener;

[0012] The handle is installed in the threaded hole on the side wall of the bushing via a threaded connector.

[0013] Preferably, the radius of curvature of the hemispherical hole is greater than the radius of the small end of the pin to be disassembled, which increases the contact area with the small end of the pin, ensures that the force is transmitted along the pin axis, reduces the radial component force, and effectively prevents the small end of the pin from tilting and deforming.

[0014] Preferably, the shock-absorbing sleeve is a double-layer composite structure, including an inner rubber sleeve and an outer steel sleeve, which are bonded together with adhesive.

[0015] Preferably, the outer wall of the shock-absorbing sleeve is alternately provided with four M5 threaded holes and four M3 countersunk threaded holes in the circumferential direction, with adjacent holes spaced 45° apart; the shock-absorbing sleeve is fixedly connected to the pinning device, which can effectively reduce the force transmitted to the handle during the pinning process, thereby reducing the risk of mechanical injury to the operator.

[0016] Preferably, four M3 threaded holes are evenly distributed circumferentially at a distance of 25mm from the end face of the second shaft segment.

[0017] Preferably, the first fastener is four internal hexagon screws that pass through the M3 countersunk threaded hole and are screwed into the M3 threaded hole of the fastener.

[0018] The bushing has four M5 threaded holes evenly distributed circumferentially in the middle of its outer wall, and four M8 threaded holes evenly distributed circumferentially at a distance of 10mm from the end face of the bushing, for installing a detachable handle.

[0019] Preferably, the second fastener consists of four M5 socket head cap screws that screw into the second M5 threaded hole of the bushing and tighten against the first M5 threaded hole of the shock absorber sleeve.

[0020] The number of handles is two, symmetrically installed on opposite side walls of the bushing. One end of each handle is provided with an M8 external thread section, and the other end is an ellipsoidal grip section, which is convenient for the operator to hold and improves stability. The threaded connection is a threaded pair formed by the M8 external thread section and the M8 threaded hole of the bushing.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. This utility model innovates by setting a hemispherical hole structure at the end of the first shaft section of the pin remover. Its radius of curvature is larger than the radius of the small end of the pin to be removed, so that the hemispherical curved surface and the small end face of the conical pin form an adaptive envelope contact, increasing the contact area, strictly constraining the direction of the striking force to the pin axis, eliminating the radial component force, effectively avoiding the small end of the pin from becoming thick or bending and deforming, fundamentally preventing the problem of pin jamming during disassembly, and improving maintenance efficiency.

[0023] 2. In this utility model, the shock-absorbing sleeve adopts an adhesive composite of an inner rubber sleeve and an outer steel sleeve, combined with a circumferentially staggered layout of M5 and M3 threaded holes at 45°, which enables the rubber sleeve to efficiently absorb the impact energy of the impact, the steel sleeve to suppress structural deformation, and the staggered arrangement of screws to enhance the overall connection rigidity, thereby achieving vibration attenuation transmitted to the handle, reducing the risk of the pin jumping out, and improving operational safety.

[0024] 3. This utility model uses M8 threaded holes symmetrically arranged on the side wall of the bushing to quickly connect with the detachable handle through an M8 thread pair. The dual handle configuration provides dual grip support points, and the ellipsoidal grip part conforms to ergonomics, perfectly adapting to the narrow working space of the YB45 packaging machine and improving the uniformity of the operating torque distribution. Attached Figure Description

[0025] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0026] Figure 1 This is a first three-dimensional structural diagram of the present invention;

[0027] Figure 2 This is a schematic diagram of the second three-dimensional structure of the present invention;

[0028] Figure 3 This is a cross-sectional view of the pinning device in this utility model;

[0029] Figure 4 This is a schematic diagram showing the connection relationship between the shock-absorbing sleeve and the bushing in this utility model;

[0030] Figure 5 This is a schematic diagram of the shock-absorbing sleeve in this utility model.

[0031] In the diagram: 1. Pinning device; 11. First shaft section; 12. Second shaft section; 13. Hemispherical hole; 14. M3 threaded hole; 15. Socket head screw; 2. Shock-absorbing sleeve; 21. Steel sleeve; 22. Rubber sleeve; 23. M5 threaded hole one; 24. M3 countersunk threaded hole; 3. Bushing; 31. M8 threaded hole; 32. M5 threaded hole two; 33. Socket head screw; 4. Handle. Detailed Implementation

[0032] like Figures 1 to 5 As shown, this utility model provides a tooling for disassembling the pins of the five-function components of a tobacco YB45 packaging machine, including a pin remover 1, a shock-absorbing sleeve 2 fitted outside the pin remover 1, a bushing 3 coaxially fitted outside the shock-absorbing sleeve 2, and a handle 4 detachably connected to the side wall of the bushing 3.

[0033] The pin-attacking device 1 has a stepped shaft structure, comprising a first shaft segment 11 and a second shaft segment 12 coaxially connected. The diameter of the first shaft segment 11 is smaller than that of the second shaft segment 12. The diameter of the first shaft segment 11 is 22 mm and the length is 150 mm. The diameter of the second shaft segment 12 is 30 mm and the length is 95 mm. The end of the first shaft segment 11 is provided with a hemispherical hole 13 for abutting the small end of the pin.

[0034] The shock-absorbing sleeve 2 is fixedly connected to the second shaft section 12 of the pin 1 by a first fastener;

[0035] The bushing 3 is locked and fixed to the outer wall of the shock-absorbing sleeve 2 by a second fastener;

[0036] The handle 4 is installed in the threaded hole on the side wall of the bushing 3 via a threaded connector.

[0037] In this embodiment, the radius of curvature of the hemispherical hole 13 is greater than the radius of the small end of the pin to be disassembled.

[0038] The ratio of the radius of curvature of the hemispherical hole 13 to the diameter of the small end of the pin to be disassembled is 1.06-1.1:1. In this embodiment, the diameter of the small end of the pin to be disassembled is 8.0mm, and the radius of curvature of the hemispherical hole is 8.5mm. This is used to increase the contact area with the small end of the pin, ensure that the force is transmitted along the pin axis, reduce the radial component force, and effectively prevent the small end of the pin from tilting and deforming.

[0039] In this embodiment, the shock-absorbing sleeve 2 is a double-layer composite structure, including an inner rubber sleeve 22 and an outer steel sleeve 21, which are bonded together with adhesive. The outer wall of the shock-absorbing sleeve 2 is alternately provided with four M5 threaded holes 23 and four M3 countersunk threaded holes 24, with adjacent holes spaced at 45° intervals. In this embodiment, the inner diameter of the shock-absorbing sleeve 2 is 30.2 mm, the outer diameter is 44.2 mm, and the length is 40 mm; the rubber sleeve 22 is 3 mm thick, and the steel sleeve 21 is 4 mm thick.

[0040] The shock-absorbing sleeve 2 is fixedly connected to the second shaft section 12 of the pinning device 1, which can effectively reduce the force transmitted to the handle 4 during the pinning process, thereby reducing the risk of mechanical injury to the operator. By precisely matching the pinning hole of the equipment through the first shaft section 22mm, the inner diameter of the shock-absorbing sleeve 2 30.2mm and the inner diameter of the second shaft section 12 of the pinning device 30mm form a micro-gap fit, which generates a damping effect during the knocking, suppresses radial runout, avoids deviation during the knocking process, shortens the disassembly time, and improves maintenance efficiency.

[0041] The second shaft segment 12 has four M3 threaded holes 14 evenly distributed around its circumference at a distance of 25mm from the end face; the first fastener consists of four internal hexagon screws 15 that pass through the M3 countersunk threaded holes 24 and are screwed into the M3 threaded holes 14 of the pin 1; the bushing 3 has an inner diameter of 50mm, an outer diameter of 60mm, and a length of 40mm; the bushing 3 has four M5 threaded holes 32 evenly distributed around its circumference in the middle of its outer wall, and four M8 threaded holes 31 evenly distributed around its circumference at a distance of 10mm from the end face of the bushing 3, for installing a detachable handle 4.

[0042] The second fastener consists of four M5 socket head cap screws 33 that screw into the 3M5 threaded hole 32 of the bushing and tighten against the 2M5 threaded hole 23 of the shock-absorbing sleeve; the handle 4 is a rod-shaped piece with a diameter of 8mm and a total length of 150mm.

[0043] In this embodiment, two handles 4 are preferably installed symmetrically on opposite sidewalls of the bushing 3. One end of each handle is provided with a 10mm long M8 external thread section, and the other end is an ellipsoidal grip part, which is convenient for the operator to hold and improves stability. The threaded connection is a threaded pair formed by the M8 external thread section and the M8 threaded hole 31 of the bushing 3.

[0044] The first shaft section 11 of the pin-removing device 1 is inserted into the pin-removing hole of the equipment, so that the hemispherical hole 13 envelops the small end face of the conical pin. The radius of curvature of the hemispherical hole 13 is greater than the diameter of the small end of the pin, forming an adaptive envelope contact, ensuring that the initial force transmission direction is strictly aligned with the pin axis. The operator holds the ellipsoidal grip of the handle 4 and applies a striking force along the pin axis. The first shaft section 11 of the stepped shaft structure precisely guides the force flow, and the interference fit damping sleeve suppresses radial runout. The hemispherical hole 13 constrains the small end of the pin to be subjected to only pure axial force, eliminating radial component force and avoiding pin upsetting deformation. The striking impact energy is transmitted to the damping sleeve 2 through the pin-removing device 1. The inner rubber sleeve 22 absorbs high-frequency vibration kinetic energy through elastic deformation, and the outer steel sleeve 21 maintains structural rigidity. The M5 threaded hole 23 and the M3 countersunk threaded hole 24 are arranged in a 45° staggered screw layout to enhance connection stability and attenuate the vibration transmitted to the handle 4.

[0045] This invention features an innovative hemispherical hole structure at the end of the first shaft section of the pin remover. The radius of curvature of this hole is larger than the radius of the small end of the pin to be disassembled, allowing the hemispherical surface to form an adaptive envelope contact with the small end face of the conical pin. This increases the contact area and strictly constrains the direction of the striking force to the pin's axial direction, eliminating radial force and effectively preventing the small end of the pin from becoming too thick or bent. This fundamentally prevents pin jamming during disassembly and improves maintenance efficiency. The shock-absorbing sleeve uses a bonded composite of an inner rubber sleeve and an outer steel sleeve, combined with a circumferentially staggered layout of M5 and M3 threaded holes at 45° intervals. This allows the rubber sleeve to efficiently absorb the impact energy, the steel sleeve to suppress structural deformation, and the staggered arrangement of screws to enhance overall connection rigidity. This attenuates vibration transmitted to the handle, reduces the risk of the pin remover jumping out, and improves operational safety. The bushing is quickly connected to the detachable handle via M8 threaded holes symmetrically arranged on the side wall. The dual handle configuration provides dual grip support points, and the ellipsoidal grip is ergonomically designed to fit the narrow working space of the YB45 packaging machine, improving the uniformity of the operating torque distribution.

[0046] The above are merely preferred embodiments of this utility model and are not intended to limit the utility model in any way. Those skilled in the art can readily implement this utility model based on the accompanying drawings and the description above. However, any modifications, alterations, or variations made by those skilled in the art without departing from the scope of the utility model's technical solution, utilizing the disclosed technical content, are equivalent embodiments of this utility model. Furthermore, any equivalent changes, alterations, or variations made to the above embodiments based on the essential technology of this utility model are still within the protection scope of this utility model's technical solution.

Claims

1. A tooling for disassembling pins of a five-function component in a tobacco YB45 packaging machine, characterized in that, include: The pin (1), the shock-absorbing sleeve (2) fitted on the outside of the pin (1), the bushing (3) coaxially fitted on the outside of the shock-absorbing sleeve (2), and the handle (4) detachably connected to the side wall of the bushing (3). The pin-attacking device (1) has a stepped shaft structure, including a first shaft section (11) and a second shaft section (12) connected coaxially. The diameter of the first shaft section (11) is smaller than that of the second shaft section (12). The end of the first shaft section (11) is provided with a hemispherical hole (13) for abutting the small end of the pin. The shock-absorbing sleeve (2) is fixedly connected to the second shaft section (12) of the pinning device (1) by a first fastener; The bushing (3) is locked and fixed to the outer wall of the shock-absorbing sleeve (2) by a second fastener; The handle (4) is installed in the threaded hole on the side wall of the bushing (3) via a threaded connector.

2. The tooling for disassembling pins of a five-function component of a tobacco YB45 packaging machine according to claim 1, characterized in that: The radius of curvature of the hemispherical hole (13) is greater than the radius of the small end of the pin to be disassembled.

3. The tooling for disassembling pins of a five-function component of a tobacco YB45 packaging machine according to claim 1, characterized in that: The shock-absorbing sleeve (2) is a double-layer composite structure, including an inner rubber sleeve (22) and an outer steel sleeve (21).

4. The tooling for disassembling pins of a five-function component in a tobacco YB45 packaging machine according to claim 3, characterized in that: The outer wall of the shock-absorbing sleeve (2) is alternately provided with four M5 threaded holes (23) and four M3 countersunk threaded holes (24) with adjacent holes spaced 45° apart.

5. The tooling for disassembling pins of a five-function component in a tobacco YB45 packaging machine according to claim 4, characterized in that: The second shaft segment (12) has four M3 threaded holes (14) evenly distributed circumferentially at a distance of 25mm from the end face.

6. The tooling for disassembling pins of a five-function component of a tobacco YB45 packaging machine according to claim 5, characterized in that: The first fastener is four internal hexagon screws (15) that pass through the M3 countersunk threaded hole (24) and are screwed into the M3 threaded hole (14) of the pin breaker (1).

7. The tooling for disassembling pins of a five-function component of a tobacco YB45 packaging machine according to claim 4, characterized in that: The bushing (3) has four M5 threaded holes (32) evenly distributed in the middle of its outer wall, and four M8 threaded holes (31) evenly distributed in the middle of its end face (3).

8. The tooling for disassembling pins of a five-function component of a tobacco YB45 packaging machine according to claim 7, characterized in that: The second fastener consists of four M5 socket head cap screws (33) that are screwed into the M5 threaded hole 2 (32) of the bushing (3) and tightened against the M5 threaded hole 1 (23) of the shock absorber sleeve (2).

9. The tooling for disassembling pins of a five-function component of a tobacco YB45 packaging machine according to claim 1, characterized in that: The number of handles (4) is two, which are symmetrically installed on opposite side walls of bushing (3). One end of each handle is provided with an M8 external thread section, and the other end is an ellipsoidal gripping part. The threaded connection is a threaded pair formed by the M8 external thread section and the M8 threaded hole (31) of bushing (3).

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