A device and method for disassembling and assembling a vibrating groove eccentric mandrel

Abstract

The application discloses a kind of eccentric core shaft dismounting device and method of vibrating groove, to solve the dismounting problem of core shaft and buffer sleeve.It includes dismounting component, including the inner circle thread of transition nut is matched with the shaft end thread segment of core shaft, the outer circle thread is matched with the inner thread of first pull cylinder, and the thread rotation direction is same; according to thread rotation direction, first pull cylinder is rotated continuously, transition nut and thread-connected core shaft are rotated into first pull cylinder, until the bearing segment of core shaft is completely introduced from buffer sleeve;The guide pull rod in installation component includes second pull cylinder and screw rod connected in front and back;The inner thread of second pull cylinder is matched with the shaft end thread segment of core shaft, the thread of screw rod is matched with the inner thread of guide nut, and the thread rotation direction is same;According to thread rotation direction, guide nut is rotated continuously, when the opening end of second pull cylinder entering pull rod guide ring is aligned with the front end port of pull rod guide ring, the bearing segment of core shaft is completely interference fit with buffer sleeve.

Description

Technical Field

[0001] This invention relates to a device and method for disassembling and assembling an eccentric mandrel in a vibrating groove, belonging to the field of tobacco conveying technology. Background Technology

[0002] Vibrating conveyors are existing technology and widely used in the tobacco industry for conveying and spreading tobacco shreds; they are often simply called vibrating troughs. A vibrating trough mainly consists of a frame, trough body, balance frame, rocker arm, eccentric transmission device, and motor. When powered, the motor rotates in a circular motion, which in turn drives the eccentric transmission device in a reciprocating linear motion via a V-belt. This drives the rocker arm to swing back and forth, causing the trough body to perform a reciprocating parabolic motion, thus conveying the tobacco shreds. After continuous parabolic motion through the trough, the tobacco shreds gradually become flat.

[0003] Vibratory grooves require regular maintenance during actual use. The eccentric bearing and buffer sleeve are particularly vulnerable parts and need periodic replacement. Disassembly and installation of the eccentric mandrel are difficult due to the interference fit between the mandrel and the buffer sleeve, and the limited space around them. Currently, the method used is to repeatedly tap one end of the mandrel with a copper rod, slowly moving it out of the buffer sleeve. Disassembly is difficult and time-consuming, typically requiring several people working in shifts, and taking approximately two hours for both disassembly and installation.

[0004] The applicant searched for relevant technical documents on the disassembly and assembly of eccentric mandrels in vibratory troughs. Among them, the disassembly and assembly device for a vibratory trough transmission assembly in a tobacco processing workshop, with publication number CN205342967U, is similar in purpose to this invention, but the methods and objects of disassembly and assembly differ. This disassembly and assembly device uses hydraulic pressing to remove the entire eccentric assembly, places it on a disassembly and assembly platform, and uses hydraulic pressure to press out the bearing and eccentric shaft. However, it does not solve the aforementioned problem of disassembly and assembly between the eccentric mandrel and the buffer sleeve. This device, on the other hand, solves the problem of disassembly and assembly between the eccentric mandrel and the buffer sleeve. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a device and method for disassembling and assembling an eccentric mandrel in a vibrating groove. By utilizing disassembly and installation components with simple structural design, the mandrel and the buffer sleeve inside the eccentric handle can be disassembled and installed, reducing labor costs and improving disassembly and assembly efficiency.

[0006] To achieve the above objectives, the present invention is implemented using the following technical solution: In a first aspect, the present invention provides a device for disassembling and assembling an eccentric mandrel with a vibrating groove, comprising: The disassembly assembly includes a transition nut and a first pull tube. The inner thread of the transition nut engages with the threaded section at the shaft end of the mandrel, and the outer thread engages with the inner thread of the first pull tube. All threads of the disassembly assembly have the same rotation direction as the threaded section at the shaft end of the mandrel. During disassembly, the first pull tube is continuously rotated to drive the transition nut and the mandrel to rotate into the first pull tube until the transition nut drives the bearing section of the mandrel to be completely pulled out from the buffer sleeve inside the eccentric handle. The mounting assembly includes a guide rod, a guide ring, and a guide nut. The guide rod comprises a second pull cylinder and a screw connected at opposite ends. The internal thread of the second pull cylinder mates with the threaded section at the end of the mandrel, and the thread of the screw mates with the internal thread of the guide nut. All threads of the mounting assembly have the same direction of rotation as the threaded section at the end of the mandrel. After the screw passes through the buffer sleeve inside the eccentric handle, it partially extends and fits into the guide ring and the guide nut, and the mandrel is screwed into the second pull cylinder. During installation, the guide nut is continuously rotated, causing the screw to continuously unscrew from the buffer sleeve. When the open end of the second pull cylinder entering the guide ring aligns with the front end of the guide ring, the bearing section of the mandrel and the buffer sleeve are fully interference-fitted.

[0007] Furthermore, the minor diameter of the outer ring thread of the transition nut is larger than the outer diameter of the bearing section of the mandrel.

[0008] Furthermore, the front end of the transition nut has an inner hexagonal hole on its inner circumference, and the distance between opposite sides of the inner hexagonal hole is greater than the major diameter of the inner thread of the transition nut; the rear end of the transition nut is a hexagonal nut segment, and the diagonal distance of the hexagonal nut segment is less than the minor diameter of the outer thread of the transition nut.

[0009] Furthermore, the depth of the first pull tube is not less than the sum of the lengths of the bearing section of the spindle and the threaded section at the shaft end on one side of the bearing section.

[0010] Furthermore, the front end of the first pull tube is provided with an outer hexagonal surface; the rear end of the first pull tube extends outward along the axial direction with a first connecting post; the outer periphery of the first connecting post is provided with an outer hexagonal surface, and the end face of the first connecting post is provided with a square hole.

[0011] Furthermore, the outer diameter of the second pull tube is smaller than the outer diameter of the bearing section of the mandrel; the depth of the second pull tube is equal to the length of the threaded section at the shaft end on one side of the bearing section; the length of the pull rod guide ring is equal to the depth of the second pull tube; and the length of the screw is greater than or equal to the length of the bearing section of the mandrel plus the length of the guide nut.

[0012] Furthermore, the second pull tube is tapered, and the outer diameter of the open end of the second pull tube is larger than the outer diameter of the screw; the inner ring of the pull rod guide ring that cooperates with the second pull tube is tapered, with the same taper as the second pull tube, and the inner diameter of the front port of the pull rod guide ring is equal to the outer diameter of the open end of the second pull tube.

[0013] Furthermore, the rear end of the screw extends outward along the axial direction to form a second connecting post; the outer periphery of the second connecting post is provided with an outer hexagonal surface.

[0014] Furthermore, the outer periphery of the guide nut is an external hexagonal surface.

[0015] Secondly, the present invention provides a method for disassembling and assembling an eccentric mandrel in a vibrating groove, which is implemented using any of the aforementioned devices for disassembling and assembling an eccentric mandrel in a vibrating groove; the method includes a disassembly step of removing the mandrel from the buffer sleeve, and / or an installation step of installing the mandrel into the buffer sleeve; The disassembly method for removing the mandrel from the buffer sleeve includes the following steps: Step A1: Remove the lock nuts on the threaded sections at both ends of the mandrel and screw the transition nut onto one of the threaded sections at the mandrel. Step A2: Screw the first pull cylinder onto the transition nut and continue rotating the first pull cylinder until the bearing section of the mandrel is completely pulled out from the buffer sleeve; Step A3: Observe the state of the mandrel after it has been pulled out: If the spindle is independent and the first pull tube is screwed to the transition nut, then the transition nut is pulled out from the first pull tube; If the first pull tube is independent and the mandrel is screwed onto the transition nut, then the transition nut is pulled out from the mandrel; The installation method for installing the mandrel into the buffer sleeve includes the following steps: Step B1: Insert the guide rod into the buffer sleeve, and screw the mandrel into the second pull cylinder threaded connection; put the pull rod guide ring and guide nut onto the screw rod; Step B2: Continue to rotate the guide nut until the front end of the pull rod guide ring moves to the opening end of the second pull tube, and the bearing section of the spindle is fully interference-fitted with the buffer sleeve; Step B3: Rotate the guide nut to disengage it from the screw, and apply force to remove the pull rod guide ring.

[0016] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: The purpose of this invention is to provide a device for disassembling and assembling an eccentric mandrel in a vibrating groove, making mandrel disassembly easy and quick. Currently, disassembly of mandrels generally requires several people taking turns striking them. Using the disassembly and assembly components of this application, one person can operate the disassembly components and corresponding screwing tools, continuously rotating the first pull cylinder in the direction of the thread to drive the transition nut and the threaded mandrel into the first pull cylinder until the transition nut drives the bearing section of the mandrel to be completely pulled out of the buffer sleeve inside the eccentric handle, thus easily disassembling the mandrel. Alternatively, one person can operate the assembly components and corresponding screwing tools, inserting the screw into the buffer sleeve inside the eccentric handle, partially extending it into the pull rod guide ring and guide nut, with the mandrel screwed into the second pull cylinder. Continuously rotating the guide nut in the direction of the thread causes the screw to continuously unscrew from the buffer sleeve, and when the opening end of the second pull cylinder entering the pull rod guide ring is aligned with the front end of the pull rod guide ring, it proves that the bearing section of the mandrel and the buffer sleeve are perfectly interference-fitted. The disassembly and assembly of the components are simple in structure and low in manufacturing cost. The assembly method between the individual components is also a threaded connection, which is convenient for operators and does not easily mislead operators. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the disassembly of an existing eccentric mandrel with a vibrating groove; Figure 2 yes Figure 1 Installation effect diagram; Figure 3 This is a schematic diagram of the use of the disassembly assembly of a vibrating groove eccentric mandrel disassembly and assembly device according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the use of the installation components of a vibration groove eccentric mandrel disassembly and assembly device provided in an embodiment of the present invention; Figure 5 yes Figure 4 Another usage status diagram; Figure 6 yes Figure 3 A schematic diagram of the structure of the first pull tube in the middle; Figure 7 yes Figure 3 Schematic diagram of the intermediate transition nut; Figure 8 yes Figure 4 Schematic diagram of the guide rod structure; In the diagram: 1. Disassembling the component; 2. Installing the component; 3. Buffer sleeve; 4. Spindle; 5. Offset handle; 11. Transition nut; 12. First pull tube; 13. First connecting post; 14. Inner hexagonal hole; 15. Hexagonal nut segment; 21. Guide rod; 22. Rod guide ring; 23. Guide nut; 24. Second pull cylinder; 25. Screw; 26. Second connecting post; 41. Shaft end threaded section; 42. Bearing section. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0019] It should be noted that: such as Figure 1 and Figure 2 The mandrel 4, eccentric handle 5, and buffer sleeve 3 are all internal components of existing tobacco conveying devices and belong to prior art. The buffer sleeve 3 is located at one end of the eccentric handle 5, and the mandrel 4 passes through the buffer sleeve 3. The bearing section 42 of the mandrel 4 and the buffer sleeve 3 are interference-fitted, making them relatively difficult to separate. The mandrel 4 includes a bearing section 42 and a threaded section 41 at the shaft end. The bearing section 42 connects between the two threaded sections 41 at the shaft end, which are used to engage with a locking nut to fix the eccentric handle 5 to the frame inside the tobacco conveying device. The specific length and depth of the components in this application are designed with reference to the corresponding length of existing mandrels. The major diameter (outer diameter) of the thread described herein refers to the diameter of an imaginary cylinder that coincides with the crest of the external thread or the root of the internal thread. The nominal diameter of the thread is the major diameter. The minor diameter (inner diameter) of the thread refers to the diameter of an imaginary cylinder that coincides with the root of the external thread or the crest of the internal thread. Example

[0020] See Figures 1 to 8 This application provides a device for disassembling and assembling an eccentric mandrel 4 in a vibrating groove, including a disassembly assembly 1 and an installation assembly 2; wherein, the disassembly assembly is used to separate the mandrel 4 from the buffer sleeve 3 currently fixed in the eccentric handle; the installation assembly 2 is used to place the mandrel 4 into the buffer sleeve 3 in the eccentric handle, thereby achieving an interference fit between the buffer sleeve 3 and the mandrel 4.

[0021] like Figure 3The disassembly assembly 1 includes a transition nut 11 and a first pull tube 12. The inner thread of the transition nut 11 engages with the threaded section 41 at the end of the spindle 4, allowing the transition nut 11 to rotate on the threaded section 41 of the spindle 4. The outer thread of the transition nut 11 engages with the inner thread of the first pull tube 12, allowing the transition nut 11 to be threadedly connected inside the first pull tube 12. The thread design involved in this disassembly assembly 1 ensures that the thread direction is the same as the thread direction of the threaded section 41 at the end of the spindle 4. The transition nut 11 is threadedly connected to the first pull tube 12 and the spindle 4 respectively. Following the thread direction, the first pull tube 12 is continuously rotated, causing the transition nut 11 and the threaded spindle 4 to rotate into the first pull tube 12, until the transition nut 11 drives the bearing section 42 of the spindle 4 to completely disengage from the buffer sleeve 3 inside the eccentric handle.

[0022] like Figure 4 and Figure 5 The mounting assembly 2 includes a guide rod 21, a rod guide ring 22, and a guide nut 23. The guide rod 21 includes a second pull cylinder 24 and a screw 25. The second pull cylinder 24 and the screw 25 are connected front and rear. The internal thread of the second pull cylinder 24 is designed to mate with the threaded section 41 at the shaft end of the spindle 4, allowing the second pull cylinder 24 to rotate forward / backward along the threaded section 41 at the shaft end of the spindle 4. The thread on the screw 25 mates with the internal thread of the guide nut 23, allowing the guide nut 23 to rotate forward / backward along the screw 25. The thread design involved in this mounting assembly 2 has the same thread direction as the threaded section 41 at the shaft end of the spindle 4. After the screw 25 is inserted into the buffer sleeve 3 inside the eccentric handle, part of the screw 25 protrudes, and the rod guide ring 22 and the guide nut 23 are fitted onto the protruding part of the screw 25, and the spindle 4 is threaded into the second pull cylinder 24. As the thread direction is followed, the guide nut 23 is continuously rotated, causing the screw 25 to continuously rotate out of the buffer sleeve 3. At the same time, the second pull cylinder 24 continuously drives the spindle 4 to rotate into the buffer sleeve 3. When the opening end of the second pull cylinder 24 entering the pull rod guide ring 22 is aligned with the front port of the pull rod guide ring 22, the bearing section 42 of the spindle 4 is fully interference-fitted with the buffer sleeve 3.

[0023] In some embodiments, the specific conditions for setting the disassembly component 1 are as follows: The minor diameter of the outer thread of the transition nut 11 is larger than the outer diameter of the bearing section 42 of the spindle 4. The purpose is to ensure that when the transition nut 11 drives the spindle 4 to be screwed into the first pull tube 12, the bearing of the spindle 4 can also smoothly enter the first pull tube 12, thereby enabling the spindle 4 to smoothly disengage from the buffer sleeve 3.

[0024] Among them, combined Figure 7The transition nut 11 has an internal hexagonal hole 14 on its front end. The distance between opposite sides of this internal hexagonal hole 14 needs to be greater than the major diameter of the inner thread of the transition nut 11. This facilitates the use of an internal hexagonal tool to rotate and pull out the transition nut 11 screwed inside the first pull tube 12, improving overall disassembly efficiency. The rear end of the transition nut 11 is a hexagonal nut segment 15. The diagonal distance of this hexagonal nut segment 15 is set to be smaller than the minor diameter of the outer thread of the transition nut 11. When the disassembled transition nut 11 is screwed onto the mandrel 4, the transition nut 11 can be easily removed from the mandrel 4 by screwing the hexagonal nut segment 15 with a corresponding screwdriver.

[0025] Correspondingly, the depth of the first pull tube 12 is not less than the sum of the lengths of the bearing section 42 of the spindle 4 and the threaded section 41 on one side of the bearing section 42. This is to ensure that during the process of rotating the first pull tube 12 to lead the spindle 4 out of the buffer sleeve 3, the first pull tube 12 can completely accommodate the bearing section 42 of the spindle 4 and the threaded section 41 on one side of the bearing section 42, allowing the bearing section 42 of the spindle 4 to completely detach from the buffer sleeve 3. If the depth is not within this range, after the rotation is completed, a portion of the bearing section 42 of the spindle 4 will remain inside the buffer sleeve 3, and complete separation will not be achieved. In current practice, the spindle 4 is passed sequentially through the mounting base and buffer sleeve 3 of the frame to install the eccentric handle on the frame. During this disassembly and assembly process, the depth and length of the first pull tube 12 need to be set according to the actual thickness of the mounting base, etc. This operation can be set according to the actual situation.

[0026] This application can directly remove the spindle 4 inside the buffer sleeve 3 that exists separately within the eccentric handle, and can also remove, as well as... Figure 1 The eccentric handle is mounted on the frame, simultaneously disengaging the spindle 4 from the eccentric handle 5. Corresponding settings also include... Figure 1 In the frame structure, both the disassembly assembly 1 and the mounting assembly 2 are configured with a right-hand rotation to avoid obstruction during rotation. The same principle applies to mounting assembly 2, which will be described later. Adjustments to length and depth can be made as needed, but these will not be elaborated upon further here.

[0027] Optional, such as Figure 6 The first pull cylinder 12 has an outer hexagonal surface on its front end (open end) to facilitate subsequent operation using corresponding screw-on tools. The rear end of the first pull cylinder 12 has a first connecting post 13, which extends outward along the axial direction of the first pull cylinder 12. The outer periphery of the first connecting post 13 has an outer hexagonal surface, and its end face has a square hole to facilitate matching with square drill bits and other corresponding tools.

[0028] In some embodiments, the specific settings for installing component 2 are as follows: The outer diameter of the second pull cylinder 24 is set smaller than the outer diameter of the bearing section 42 of the mandrel 4. This setting is intended to allow the second pull cylinder 24 to pass smoothly through the buffer sleeve 3. The diameter of the screw 25 must also be smaller than the outer diameter of the bearing section 42. The depth of the second pull cylinder 24 is equal to the length of the threaded section 41 on the shaft end of the bearing section 42, and the length of the pull rod guide ring 22 is equal to the depth of the second pull cylinder 24. The length of the screw 25 is greater than or equal to the sum of the lengths of the bearing section 42 of the mandrel 4 and the guide nut 23. This design allows the screw 25 to be continuously pulled out when the guide nut 23 is rotated, driving the second pull cylinder 24 into the pull rod guide ring 22 on the outside of the buffer sleeve 3 and completely overlapping it. At this point, it can be proven that the second pull cylinder 24 (the threaded section 41 on the shaft end of the bearing section 42) is completely pulled out of the outside of the buffer sleeve 3, that is, the interference fit of the mandrel 4 and the buffer sleeve 3 is completely adapted.

[0029] The length of the screw 25 is equal to or greater than the sum of the length of the bearing section 42 of the spindle 4 and the length of the guide nut 23. This ensures that after the screw 25 extends through the buffer sleeve 3, one end can be fitted with the pull rod guide ring 22 and the guide nut 23, and the second pull cylinder 24 connected to the other end can also be threadedly connected to the threaded section 41 of the spindle 4, thus achieving the minimum installation length requirement.

[0030] Optionally, the second pull cylinder 24 is tapered, meaning its outer surface is tapered. The outer diameter of the open end of the second pull cylinder 24 is larger than the outer diameter of the screw 25 (i.e., the outer diameter of the end of the screw 25 to which the second pull cylinder 24 is connected). Correspondingly, the inner ring (inner surface) of the pull rod guide ring 22, which mates with the second pull cylinder 24, is tapered, with the same taper as the second pull cylinder 24, and the inner diameter of the front end of the pull rod guide ring 22 is equal to the outer diameter of the open end of the second pull cylinder 24. The surfaces of the second pull cylinder 24 and the pull ring guide rod that come into contact with each other are both designed with a tapered structure. The inner diameter of the front end of the pull rod guide ring 22 is equal to the outer diameter of the opening end of the second pull cylinder 24. This allows the pull rod guide ring 22 to limit the second pull cylinder 24. When the second pull cylinder 24 is fully extended out of the buffer sleeve 3, even if it is subjected to an outward pulling force, the second pull cylinder 24 will no longer move outward due to the restriction of the pull rod guide ring 22. This improves the accuracy of the interference fit between the buffer sleeve 3 and the spindle 4 and effectively avoids situations such as the bearing section 42 of the spindle 4 extending out of the buffer sleeve 3.

[0031] Alternatively, when it is not necessary to perfectly fit the mandrel 4 and the buffer sleeve 3 in actual operation, the length of the pull rod guide ring 22 can be set to be greater than the depth of the second pull tube according to actual needs. At the same time, the depth of the second pull tube 24 is greater than the length of the threaded section 41 on the shaft end of the bearing section 42, which can also make the mandrel 4 fit into the buffer sleeve 3. However, compared with the above optional solutions, there is no precise limiting effect.

[0032] Optional, such as Figure 8 A second connecting post 26 extends from the rear end of the screw 25 along the axial direction of the screw 25. The outer periphery of the second connecting post 26 is set as an external hexagonal surface to facilitate subsequent operation by operators using corresponding screwing tools.

[0033] Optionally, the guide nut 23 has an outer hexagonal surface on its outer periphery to facilitate rotation by the operator using a matching screwdriver. Any of the aforementioned screwdrivers can be manual or electric. The configuration is determined according to actual needs. Example

[0034] In conjunction with the eccentric mandrel disassembly and assembly device 4 provided in Embodiment 1, this embodiment provides a method for disassembling and assembling the eccentric mandrel in a vibrating groove, specifically implemented using the eccentric mandrel disassembly and assembly device described in Embodiment 1; the disassembly and assembly method includes a disassembly step of removing the mandrel from the buffer sleeve, and / or an installation step of installing the mandrel into the buffer sleeve; (a) The disassembly method for removing the mandrel from the buffer sleeve includes the following steps: Step A1: Remove the locking nuts on the threaded sections 41 at both ends of the spindle 4, and screw the transition nut 11 onto one of the threaded sections 41.

[0035] Step A2: Screw the first pull tube 12 onto the transition nut 11 and continue to rotate the first pull tube 12 until the bearing section 42 of the spindle 4 is completely pulled out from the buffer sleeve 3.

[0036] Specifically, the first pull cylinder 12 is threadedly connected to the transition nut 11, and the first pull cylinder 12, which has an outer hexagonal surface on its front end or a square hole on its end face, is continuously rotated according to the thread direction until the bearing section 42 of the mandrel 4 is completely pulled out from the buffer sleeve 3. During this process, one operator can use an electric rotating tool to drive the mandrel 4 out of the buffer sleeve 3, effectively improving the disassembly efficiency and reducing the number of manual laborers.

[0037] Step A3: Observe the state of the mandrel after it has been pulled out: If the spindle 4 is independent, and the first pull tube 12 is screwed to the transition nut 11, then the transition nut 11 is led out from the first pull tube 12; If the first pull tube 12 is independent and the spindle 4 is screwed to the transition nut 11, then the transition nut 11 is pulled out from the spindle 4.

[0038] When the mandrel 4 is independent, the first pull tube 12 is screwed onto the transition nut 11; then, using an internal hexagonal tool with the internal hexagonal hole 14 on the inner circumference of the front end of the transition nut 11, the transition nut 11 is pulled out from the first pull tube 12. When the first pull tube 12 is independent, the mandrel 4 is screwed onto the transition nut 11; then, using an external hexagonal tool with the hexagonal nut segment 15 of the transition nut 11, the transition nut 11 is pulled out from the mandrel 4. The design of the internal hexagonal hole 14 at the front end and the hexagonal nut segment 15 at the rear end of the transition nut 11 provides operators with an effective disassembly structure, improving disassembly efficiency.

[0039] (ii) The installation method for installing the mandrel into the buffer sleeve includes the following steps: Step B1: Insert the guide rod 21 into the buffer sleeve 3, and screw the spindle 4 into the second pull cylinder 24; put the pull rod guide ring 22 and guide nut 23 onto the screw 25.

[0040] Step B2: Continuously rotate the guide nut 23 until the front end of the pull rod guide ring 22 moves to the open end of the second pull cylinder 24, and the bearing section 42 of the spindle 4 is fully interference-fitted with the buffer sleeve 3. During this process, use an external hexagonal tool to continuously rotate the guide nut 23 in conjunction with its external hexagonal surface.

[0041] Step B3: Rotate the guide nut 23 to disengage it from the screw 25, and apply force to remove the pull rod guide ring 22. Specifically, use an external hexagonal tool to rotate the guide nut 23 along its hexagonal surface to disengage it from the screw 25, and apply force to remove the pull rod guide ring 22. The contact surface between the pull rod guide ring 22 and the guide nut 23 is conical; during removal, it can be easily removed along the gradually decreasing diameter end of the cone.

[0042] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0043] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0044] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A device for disassembling and assembling an eccentric mandrel in a vibrating groove, characterized in that, include: The disassembly assembly includes a transition nut and a first pull tube. The inner thread of the transition nut engages with the threaded section at the shaft end of the mandrel, and the outer thread engages with the inner thread of the first pull tube. All threads of the disassembly assembly have the same rotation direction as the threaded section at the shaft end of the mandrel. During disassembly, the first pull tube is continuously rotated to drive the transition nut and the mandrel to rotate into the first pull tube until the transition nut drives the bearing section of the mandrel to be completely pulled out from the buffer sleeve inside the eccentric handle. The mounting assembly includes a guide rod, a guide ring, and a guide nut. The guide rod comprises a second pull cylinder and a screw connected at opposite ends. The internal thread of the second pull cylinder mates with the threaded section at the end of the mandrel, and the thread of the screw mates with the internal thread of the guide nut. All threads of the mounting assembly have the same direction of rotation as the threaded section at the end of the mandrel. After the screw passes through the buffer sleeve inside the eccentric handle, it partially extends and fits into the guide ring and the guide nut, and the mandrel is screwed into the second pull cylinder. During installation, the guide nut is continuously rotated, causing the screw to continuously unscrew from the buffer sleeve. When the open end of the second pull cylinder entering the guide ring aligns with the front end of the guide ring, the bearing section of the mandrel and the buffer sleeve are fully interference-fitted.

2. The eccentric mandrel disassembly and assembly device for the vibrating groove according to claim 1, characterized in that, The minor diameter of the outer thread of the transition nut is greater than the outer diameter of the bearing section of the mandrel.

3. The eccentric mandrel disassembly and assembly device for the vibrating groove according to claim 2, characterized in that, The front end of the transition nut has an inner hexagonal hole on its inner circumference, and the distance between opposite sides of the inner hexagonal hole is greater than the major diameter of the inner thread of the transition nut; the rear end of the transition nut is a hexagonal nut segment, and the diagonal distance of the hexagonal nut segment is less than the minor diameter of the outer thread of the transition nut.

4. The eccentric mandrel disassembly and assembly device for vibrating grooves according to claim 3, characterized in that, The depth of the first pull tube is not less than the sum of the length of the bearing section of the mandrel and the length of the threaded section at the shaft end on one side of the bearing section.

5. The eccentric mandrel disassembly and assembly device for vibrating grooves according to claim 4, characterized in that, The front end of the first pull tube has an outer hexagonal surface; the rear end of the first pull tube extends outward along the axial direction to form a first connecting post; the outer periphery of the first connecting post has an outer hexagonal surface, and the end face of the first connecting post has a square hole.

6. The eccentric mandrel disassembly and assembly device for vibrating grooves according to claim 1, characterized in that, The outer diameter of the second pull tube is smaller than the outer diameter of the bearing section of the mandrel; the depth of the second pull tube is equal to the length of the threaded section at the shaft end on one side of the bearing section; the length of the pull rod guide ring is equal to the depth of the second pull tube; and the length of the screw is greater than or equal to the length of the bearing section of the mandrel plus the length of the guide nut.

7. The eccentric mandrel disassembly and assembly device for vibrating grooves according to claim 6, characterized in that, The second pull cylinder is conical, and the outer diameter of the open end of the second pull cylinder is larger than the outer diameter of the screw; the inner ring of the pull rod guide ring that cooperates with the second pull cylinder is conical, with the same taper as the second pull cylinder, and the inner diameter of the front port of the pull rod guide ring is equal to the outer diameter of the open end of the second pull cylinder.

8. The vibration groove eccentric mandrel disassembly and assembly device according to claim 7, characterized in that, The rear end of the screw extends outward along the axial direction to form a second connecting post; the outer periphery of the second connecting post is provided with an outer hexagonal surface.

9. The vibration groove eccentric mandrel disassembly and assembly device according to claim 8, characterized in that, The outer periphery of the guide nut is an external hexagonal surface.

10. A method for disassembling and assembling an eccentric mandrel with a vibrating groove, characterized in that, The method is implemented using the eccentric mandrel disassembly and assembly device of any one of claims 1 to 9; the method includes a disassembly step of removing the mandrel from the buffer sleeve, and / or an installation step of installing the mandrel into the buffer sleeve; The disassembly method for removing the mandrel from the buffer sleeve includes the following steps: Step A1: Remove the lock nuts on the threaded sections at both ends of the mandrel and screw the transition nut onto one of the threaded sections at the mandrel. Step A2: Screw the first pull cylinder onto the transition nut and continue rotating the first pull cylinder until the bearing section of the mandrel is completely pulled out from the buffer sleeve; Step A3: Observe the state of the mandrel after it has been pulled out: If the mandrel is independent and the first pull tube is screwed into the transition nut, then the transition nut is pulled out from the first pull tube; If the first pull tube is independent and the mandrel is screwed onto the transition nut, then the transition nut is pulled out from the mandrel; The installation method for installing the mandrel into the buffer sleeve includes the following steps: Step B1: Insert the guide rod into the buffer sleeve, and screw the mandrel into the second pull cylinder threaded connection; put the pull rod guide ring and guide nut onto the screw rod; Step B2: Continue to rotate the guide nut until the front end of the pull rod guide ring moves to the opening end of the second pull tube, and the bearing section of the spindle is fully interference-fitted with the buffer sleeve; Step B3: Rotate the guide nut to disengage it from the screw, and apply force to remove the pull rod guide ring.

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