Special bearing dismounting and mounting device for transfer turret

Abstract

The utility model discloses a special bearing disassembling and assembling device for a transmission turret. The special bearing disassembling and assembling device consists of a base, a support, a supporting rod and a disassembling and assembling screw rod, the base is provided with a first mounting hole and an avoiding opening and is arranged below the swing arm; the support is parallel to the base and provided with a second mounting hole and a lifting hole, the support and the base form a portal structure through a supporting rod, the supporting rod penetrates through a support hole to be screwed into a base hole, the base and the support are strip-shaped, and corresponding hole centers are coaxially aligned and are screw holes. The distance between the supporting rods is matched with a swing arm bearing, a shaft sleeve and the like, the distance between the base and the support meets the requirement, and the receding hole is larger than the diameter of the nut end. The dismounting screw penetrates through the lifting hole of the support and can be lifted, and a fixed or screw head type knob handle is arranged at the tail end of the dismounting screw. A pressing plate with a sliding hole and a central hole is arranged on the supporting rod, a compression spring is arranged between the pressing plate and the support, and the central hole is used for avoiding related parts. According to the device, the swing arm is sleeved with the portal structure, the bearing mounting shaft is dismounted and mounted through lifting of the dismounting and mounting screw, operation is convenient and efficient, the structure is stable, and adaptability is high.

Description

Technical Field

[0001] This utility model relates to the field of auxiliary tooling technology for tobacco packaging machines, specifically to a special bearing disassembly and assembly device for a transfer turret. Background Technology

[0002] The transfer turret mold box receives the formed tobacco packages conveyed upwards by the elevator. Reception is achieved by closing the hook covers on both sides of the transfer turret mold box. Then, the tobacco package positioner precisely adjusts the position of the tobacco packages within the transfer turret mold box. After rotating nearly one revolution within the transfer turret, the input pusher conveys the tobacco packages to the drying wheel. During this process, the hook covers on both sides of the transfer turret mold box remain closed. They are opened again in the next step to receive other tobacco packages. The opening and closing of the transfer turret mold box is achieved through the engagement of a central bakelite cam curve and bearings on the hook cover swing arms that are tightly attached to the cam.

[0003] The bearings on the transfer turret are model 625-2Z. Two bearing sleeves are stacked on each hook cover swing arm. The hook covers on both sides of the mold box open or close simultaneously. One bearing directly contacts the bakelite cam and indirectly transmits motion to the other hook cover via the bearing assembly. Because the bearings and the small shafts on the swing arms are interference-fitted, considerable force is required during disassembly and assembly. However, the bearings are small and can only withstand a limited load. Uneven force during disassembly and assembly can easily damage the bearings, leading to inflexible rotation and a significantly shortened service life. Currently, replacing the bearings in the transfer turret is difficult due to space constraints. Traditional SKF bearing disassembly and assembly fixtures or presses require disassembling the entire turret assembly into each swing arm. Disassembling the hook cover swing arms requires removing the turret mold box, guide plate, spring, shaft, gasket, bushing, and other parts one by one to remove the swing arm. This is tedious, prone to incorrect installation, and time-consuming. Therefore, in order to control time costs and improve effective operating efficiency, there is an urgent need to design a tooling that can quickly disassemble and install bearings without disassembling other turret components as much as possible, ensuring even stress distribution and not affecting performance or service life. However, if the hook cover swing arm is not completely disassembled for replacement, the operating space is too narrow, requiring only one-handed access, making existing disassembly tooling unusable. Existing technology, due to the limited internal space of the turret support, restricts the use of traditional bearing disassembly and installation tooling. Therefore, to properly disassemble and install bearings, the hook cover swing arm must be removed from the turret assembly before replacing the bearing. However, due to the overlapping and interlocking structure of the hook cover swing arms, disassembling the swing arm requires disassembling two to three molds on both sides, as well as guide plates, springs, shafts, washers, bushings, and other parts one by one before removing the swing arm and then disassembling and installing the bearing. This operation is complex, time-consuming, and labor-intensive, and prone to rework due to incorrect orientation or sequence of installation, resulting in low maintenance efficiency. Summary of the Invention

[0004] To address the shortcomings and inconveniences of the existing technology, the inventors designed and manufactured a bearing disassembly and assembly device specifically for transmission turrets. This device effectively controls time costs and improves the bearing disassembly and assembly efficiency. The bearing disassembly and assembly fixture of this invention has a simple structure, low cost, and is easy to use. During the disassembly and assembly process, the bearing and shaft are subjected to uniform force, which can effectively ensure the flexible rotation and service life of the bearing. Furthermore, when replacing the bearing, only a single turret mold box needs to be disassembled to replace the bearings on the corresponding two hook cover swing arms, eliminating many tedious small parts disassembly and assembly steps, simplifying maintenance procedures, greatly shortening maintenance time, and significantly improving maintenance efficiency.

[0005] Specifically, this utility model is implemented as follows: A bearing disassembly and assembly device for a transmission turret includes: a base serving as a base plate, having a first mounting hole and a clearance opening, which functions as a baffle and is placed below the swing arm of the transmission turret; a support located above the base and arranged parallel to the base, including two second mounting holes at both ends and a lifting hole, used to cooperate with the support rod to form an integrated installation structure with the base, and can serve as a support force-bearing mechanism for the lifting and lowering of the disassembly and assembly screw; two support rods, each passing through a second mounting hole on the support and then screwed into the first mounting hole of the base for fixation, the support rod, the base, and the support together form a gantry structure; the disassembly and assembly screw passes through the lifting hole in the middle of the support with a threaded fit, and its vertical movement relative to the support can be controlled by rotating the disassembly and assembly screw.

[0006] Furthermore, both the base and the support are strip-shaped structures, and the centers of the first and second mounting holes on the same side of the displacement are aligned on the same axis. Both the first and second mounting holes are threaded holes, and the support rod is a threaded rod.

[0007] Furthermore, the distance between the two support rods is not narrower than the width of the bearing mounting point on the swing arm of the transmission turret, nor narrower than the diameter of the installed bushing and bearing pad; the distance between the base and the support is not less than the height from the bottom surface of the swing arm to the top of the bearing.

[0008] Furthermore, the diameter of the clearance opening is larger than the diameter of the nut end of the bearing fixing shaft, and the tail end of the disassembly screw is provided with a knob handle, which is fixedly connected to the disassembly screw.

[0009] Furthermore, the knob handle may be a screw head, which can be rotated by inserting a tool into the top of the screw head.

[0010] Furthermore, a clamping plate is fitted onto the two support rods. The clamping plate is provided with a sliding hole and a central opening. The clamping plate is placed between the support and the base, and a compression spring is fitted between the clamping plate and the support. The compression spring can provide a downward thrust to the clamping plate. The central opening is used to avoid the nut of the disassembly screw and bearing fixing shaft.

[0011] Furthermore, the diameter of the central opening is not less than the diameter of the nut of the bearing fixing shaft.

[0012] The working principle of this utility model is as follows: A gantry structure consisting of a base, a support, and two support rods allows this gantry structure to be fitted onto the structural part of the turret swing arm. The base, as the foundation component in contact with the lower part of the turret swing arm, holds the lower edge of the swing arm end. The support rods are located on both sides, while the support is located above the swing arm end, i.e., above the bearing to be disassembled. The support is installed parallel to the base and is tightly connected to the base via the support rods, ensuring that the gantry structure has sufficient strength and stability to fit snugly onto the turret swing arm. On the end of the swing arm, screw the disassembly screw downwards to align it with the axis of the bearing shaft until the end of the disassembly screw touches the end of the bearing shaft. Continue to screw the disassembly screw downwards, transferring the force to the bearing shaft and pushing it downwards. This pushes the shaft out from the bottom surface of the swing arm end and out through the clearance hole on the base, thus removing the bearing mounting shaft. Tighten the disassembly screw in the opposite direction to reset it, and then the two stacked bearings can be removed. Conversely, invert the device, with the base placed above the bearing of the turret swing arm and the support below the end of the turret swing arm. First, unscrew the disassembly screw to create space, then position the bearing to be replaced and the bearing mounting shaft. Insert the mounting shaft from below the swing arm, then place the base against the top surface of the bearing. Rotate the disassembly screw to press it against the shaft cap of the mounting shaft. Continue to screw the disassembly screw to push the mounting shaft into place. Then, remove the device, screw in the nut to secure the bearing, and the installation is complete.

[0013] The beneficial technical effects of this utility model are as follows: The device has a compact structure and can be used upright or upside down, respectively corresponding to the disassembly and installation of bearings. It can also be quickly assembled and adjusted in a narrow space with one hand. The bearing mounting shaft can be pushed out or inserted by operating the knob to complete the disassembly or installation of the bearing. It can meet the needs of different work stages, is flexible in use, and improves work efficiency. Attached Figure Description

[0014] Figure 1 A three-dimensional structural diagram of the transmission turret;

[0015] Figure 2 A schematic diagram of the structure of the hook cover swing arm located on the transfer turret;

[0016] Figure 3 This is a schematic diagram of the installation structure of the hook cover swing arm and bearing;

[0017] Figure 4 This is a three-dimensional view of the structural composition of the bearing disassembly and assembly device for the transmission turret of this utility model;

[0018] Figure 5 This is an exploded view of the special bearing assembly / disassembly device with a clamping plate structure in Example 2;

[0019] Figure 6 This is a perspective view of the special bearing assembly and disassembly device with a clamping plate structure installed in Example 2;

[0020] Figure 7 This is a schematic diagram illustrating the bearing disassembly process of the special bearing disassembly and assembly device of this utility model.

[0021] Figure 8 A schematic diagram illustrating the bearing installation process of the special bearing disassembly and assembly device of this utility model;

[0022] Figure 9 This is a schematic diagram illustrating the operational state of this utility model.

[0023] Wherein: 1—base, 2—first mounting hole, 3—second mounting hole, 4—avoidance opening, 5—support, 6—lifting hole, 7—support rod, 8—removal screw, 9—pressure plate, 10—sliding hole, 11—center opening, 12—compression spring, 13—hook cover swing arm, 14—mounting shaft, 15—bearing. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0025] Example 1: Practical instructions for using a bearing disassembly and assembly device for a transmission turret:

[0026] Due to space constraints, the base 1 should be as small as possible while meeting usage and strength requirements. M5 threaded holes are machined on both sides of the base 1 for fixing long screws on both sides; the distance between the two threaded holes is slightly larger than the diameter of the 625 bearing 15. The clearance hole 4 in the base 1 allows the mounting shaft 14, the fixing shaft of the bearing 15, to pass through; therefore, the diameter of the clearance hole 4 for the disassembly fixture is slightly larger than one end of the outer hexagon of the shaft. The clearance hole 4 is located in the center of the base 1. The support 5 has the same external dimensions as the base 1, with an M5 second mounting hole 3 on each side and a lifting hole 6 in the middle. The threaded holes on both sides are used to fix the support rods 7 on both sides, and the lifting hole 6 in the middle is used to fix the shorter top screw, i.e., the disassembly screw 8.

[0027] The screw holes on both sides of the base 1 and support 5 are M5*35, and the lifting hole 6 in the middle of support 5 is M5*25. The two support rods 7 on both sides serve as two feet to connect the base 1 and support 5. The mounting screw 8 is used to install the top shaft 14, and axial force is applied to it by screwing it into the support 5. The two screw-like support rods 7 on both sides are passed through the support 5 and then connected to the base 1. While ensuring that the base 1 and support 5 are parallel, the distance between them should be greater than the length of the small shaft for mounting the bearing 15. Then screw in the mounting screw.

[0028] The working process of this device is as follows:

[0029] 1. Disassemble the turret mold box corresponding to the hook cover swing arm 13 where the bearing 15 needs to be replaced. This will maximize the range of motion of the swing arm and facilitate the use of the tooling.

[0030] 2. Remove the retaining nut of bearing 15 that needs to be replaced.

[0031] 3. After rotating the swing arm to a position with more space, place the assembled disassembly fixture on it: the clearance hole 4 of the base 1 fits onto the outer hexagonal end of the mounting shaft 14, and the disassembly screw 8 abuts against the threaded end of the mounting shaft 14.

[0032] 4. Screw in the disassembly screw 8 to push the mounting shaft 14 out of the bearing 15.

[0033] 5. After replacing bearing 15, insert the mounting shaft 14 into bearing 15 by hand.

[0034] 6. After inverting the device, with the base 1 facing upwards and the clearance opening 4 aligned with the threaded end of the mounting shaft 14, the disassembly screw 8 presses against the bottom hexagonal end of the mounting shaft 14.

[0035] 7. Screw in the disassembly screw 8 to press the mounting shaft 14 into the bearing 15.

[0036] 8. Install the bearing fixing nut for shaft 14.

[0037] 9. Install the turret module. Disassembly and replacement complete.

[0038] Example 2: Based on Example 1, preferably, a clamping plate 9 is also fitted onto the two support rods 7. The clamping plate 9 is provided with a sliding hole 10 and a central opening 11. The clamping plate 9 is placed between the support 5 and the base 1, and a compression spring 12 is fitted between the clamping plate 9 and the support 5. The compression spring 12 can provide a downward pushing force to the clamping plate 9. The central opening 11 is used to avoid the disassembly screw 8 and the nut of the bearing fixing shaft. Under normal conditions, the clamping plate 9 is close to the base 1 due to the supporting force of the compression spring 12, forming a clamping state between the clamping plate 9 and the base 1. It can be clamped at the end of the hook cover swing arm 13. The purpose of this structure is that it can be clamped at the end and above the bearing 15, providing overall stability and reliability of the device. The alignment and adjustment operation can be completed by one hand for fine-tuning the position without worrying about instability or slippage, further improving the convenience of operation.

[0039] Example 3: Practical Case

[0040] The transfer turret bearing 15 disassembly and assembly device was implemented in the FOCKE.FX unit assembly maintenance in January 2024, and its effectiveness was investigated and statistically analyzed. According to the comparative analysis of the statistical results: before implementation, replacing all 40 bearings 15 in the transfer turret took an average of 3 hours. After using this tooling, three assembly maintenance operations were performed, with an average time of 1 hour. Maintenance time was reduced by two-thirds, and maintenance efficiency was significantly improved.

[0041] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within its protection scope. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A bearing disassembly and assembly device for a transmission turret, characterized in that... include: The base (1), as a base plate, has a first mounting hole (2) and a clearance opening (4), which serves as a baffle and is placed below the swing arm of the transfer turret. The support (5) is located above the base (1) and arranged parallel to the base (1). It includes two second mounting holes (3) at both ends and a lifting hole (6) to cooperate with the support rod (7) to form an integral installation structure with the base (1). It can be used as a support force-bearing mechanism for lifting and lowering the mounting screw (8). The support rod (7) consists of two rods, which pass through a second mounting hole (3) on the support (5) and then the rod ends are screwed into the first mounting hole (2) of the base (1) for fixation. The support rod (7), the base (1) and the support (5) together form a gantry structure. The mounting screw (8) passes through the internal thread of the lifting hole (6) in the middle of the support (5), and its up and down movement relative to the support (5) can be controlled by rotating the mounting screw (8).

2. The bearing disassembly and assembly device for a transmission turret according to claim 1, characterized in that, The base (1) and the support (5) are both strip structures. The centers of the first mounting hole (2) and the second mounting hole (3) on the same side of the displacement are aligned on the same axis. The first mounting hole (2) and the second mounting hole (3) are both screw holes. The support rod (7) is a screw rod.

3. The bearing disassembly and assembly device for a transmission turret according to claim 1, characterized in that, The distance between the two support rods (7) is not narrower than the width of the bearing of the swing arm mounting shaft (14) of the transmission turret, nor narrower than the diameter of the bushing and bearing pad installed. The distance between the base (1) and the support (5) is not less than the height from the bottom surface of the swing arm to the top of the bearing (15).

4. The bearing disassembly and assembly device for a transmission turret according to claim 1, characterized in that, The diameter of the clearance opening (4) is larger than the diameter of the nut end of the bearing fixing shaft. The tail end of the disassembly screw (8) is provided with a knob handle, which is fixedly connected to the disassembly screw (8).

5. The bearing disassembly and assembly device for a transmission turret according to claim 4, characterized in that, Alternatively, the knob handle may be a screw head, which can be rotated by inserting a tool into the top of the screw head.

6. The bearing disassembly and assembly device for a transmission turret according to claim 1, characterized in that, A clamping plate (9) is also fitted on the two support rods (7). The clamping plate (9) is provided with a sliding hole (10) and a central opening (11). The clamping plate (9) is placed between the support (5) and the base (1). A compression spring (12) is fitted between the clamping plate (9) and the support (5). The compression spring (12) can provide a downward thrust to the clamping plate (9). The central opening (11) is used to avoid the disassembly screw (8) and the nut of the bearing fixing shaft.

7. The bearing disassembly and assembly device for a transmission turret according to claim 6, characterized in that, The diameter of the central opening (11) is not less than the diameter of the nut of the bearing fixing shaft.

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