Adaptive polishing head assembly
By using the cross coupling and guide screw design of the adaptive grinding head assembly, the problem of eccentric rotation caused by positional deviation of the grinding head assembly is solved, thereby reducing vibration and improving accuracy.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 无锡市威博钟山科技有限公司
- Filing Date
- 2025-08-20
- Publication Date
- 2026-07-31
AI Technical Summary
During pipe grinding, the grinding head assembly may rotate eccentrically due to positional deviation, causing damage to the equipment or pipe.
The adaptive grinding head assembly is connected to the blade assembly via a cross coupling, and combined with the design of the polishing screw and thrust bearing, it ensures that the blade assembly rotates coaxially with the pipe, reducing vibration and wear.
It effectively reduces the vibration of the grinding head assembly, extends its service life, improves grinding accuracy, and reduces the risk of wear and tear on equipment and pipelines.
Smart Images
Figure CN224575395U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of pipe grinding equipment technology, and in particular to an adaptive grinding head assembly. Background Technology
[0002] When grinding pipes, the grinding head assembly usually needs to be aligned with the pipe to accurately grind the upper part of the pipe. The grinding head assembly typically includes a cutter shaft, a cutter disc fixedly sleeved on the lower outer end of the cutter shaft, and blades fixed to the side of the cutter disc. The blades grind the upper part of the pipe. A positioning pin is fixed to the lower end of the cutter shaft, which extends into the pipe and fits with the inner wall of the pipe to achieve alignment between the grinding head assembly and the pipe. However, due to the pipe itself having a certain positional deviation or the positional deviation occurring during positioning, the grinding head assembly is prone to eccentric motion when rotating. Uneven force on the grinding head assembly causes severe vibration, which can easily lead to equipment or pipe damage in the long run.
[0003] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content
[0004] To address the shortcomings of existing technologies, this utility model discloses an adaptive grinding head assembly to solve the problem that the eccentric rotation of the grinding head assembly when the pipeline has a positional deviation can easily lead to damage to the equipment or pipeline.
[0005] The technical solution adopted in this utility model is as follows: An adaptive grinding head assembly includes: a shank; a blade assembly including a blade disc and a blade shaft, the blade disc being sleeved and fixed to the lower end of the outer side of the blade shaft, and a blade being fixed to the side of the blade disc; and a connecting assembly including a connecting sleeve and a cross coupling, the connecting sleeve being a hollow structure, the cross coupling being sleeved inside the connecting sleeve, and the lower end of the cross coupling being able to slide radially relative to the upper end; wherein, the lower end of the shank passes through the upper end of the connecting sleeve and is fixedly connected to the upper end of the cross coupling, and the upper end of the blade shaft passes through the lower end of the connecting sleeve and is fixedly connected to the lower end of the cross coupling.
[0006] A further technical solution is that the connecting sleeve includes a cylindrical body, an upper cover, and a lower cover; the cylindrical body is vertically arranged and has openings at both the upper and lower ends; the upper cover is fixed to the upper end of the cylindrical body, and the lower cover is fixed to the lower end of the cylindrical body, and the cylindrical body, the upper cover, and the lower cover form a cavity for accommodating the cross coupling.
[0007] A further technical solution is that the cross coupling includes a cross shaft, a first fork, and a second fork; a first slide is provided at the lower end of the first fork, and a first slide groove is provided at the upper end of the cross shaft, the first slide is engaged with the upper end of the first slide groove, and the first slide can slide along the first slide groove; a second slide is provided at the upper end of the second fork, and a second slide groove is provided at the lower end of the cross shaft, the second slide is engaged with the second slide groove, and the second slide can slide along the second slide groove.
[0008] A further technical solution is that the lower end of the upper cover extends out a first extension portion into the cylinder body, and a set screw is screwed into the side of the cylinder body and tightened to press against the side of the first extension portion; the upper end of the lower cover extends out a second extension portion into the cylinder body, and a set screw is screwed into the side of the cylinder body and tightened to press against the side of the second extension portion.
[0009] A further technical solution is that the adaptive grinding head assembly also includes a first thrust bearing, which is sleeved on the outside of the cutter shaft, with its upper end connected to the lower end of the connecting sleeve and its lower end connected to the upper end of the cutter disc.
[0010] A further technical solution is that the adaptive grinding head assembly further includes a positioning component, the positioning component includes a positioning post, the positioning post extends into the interior of the pipe to be processed, the outer side of the positioning post is clearance-fitted with the inner wall of the pipe to be processed, and a screw passes through the positioning post and is threadedly connected to the lower end of the cutter shaft.
[0011] A further technical solution is that the inside of the pipe to be processed has a diameter-changing section, and the lower outer end of the positioning column has an inclined surface. The angle between the inclined surface and the axis of the positioning column is greater than the angle between the diameter-changing section and the axis of the pipe to be processed.
[0012] A further technical solution is that the screw is a smooth rod screw, which includes a threaded portion, a smooth rod portion, and a head connected sequentially from top to bottom. The outer diameter of the head is larger than the outer diameter of the smooth rod portion, and the outer diameter of the smooth rod portion is larger than the outer diameter of the threaded portion. The smooth rod portion passes through the positioning post and abuts against the lower end of the cutter shaft. The threaded portion is threadedly connected to the cutter shaft. The positioning assembly also includes a second thrust bearing, which is fixedly sleeved on the outside of the smooth rod portion. The upper end of the second thrust bearing is connected to the lower end of the cutter shaft, and the lower end is embedded in the upper end of the positioning post.
[0013] The beneficial effects of this utility model embodiment are as follows: (i) The adaptive grinding head assembly of this utility model connects the shank and the blade assembly through a cross coupling. The cross coupling is sleeved in the connecting sleeve, so that the upper and lower parts of the cross coupling are connected. During rotation, the lower part of the cross coupling can move radially toward the axis of the pipe relative to the upper part, so that the blade assembly can be nearly coaxial with the pipe, reducing the vibration of the grinding head assembly during rotation, extending the service life of the grinding head assembly, and improving the grinding accuracy of the grinding head assembly.
[0014] (ii) Furthermore, by employing a polished rod screw, which is threadedly connected to the lower end of the cutter shaft, a positioning pin is rotatably fitted onto the polished rod portion of the polished rod screw. A second thrust bearing is fixedly fitted onto the outer side of the polished rod portion. The positioning pin and the second thrust bearing are confined between the screw head and the lower end of the cutter shaft. When the adaptive grinding head assembly rotates, the positioning pin contacts the inner wall of the pipe and rotates together, reducing wear between the positioning pin and the inner wall of the pipe. The second thrust bearing allows for a certain offset of the positioning pin's axis, further reducing wear between the positioning pin and the inner wall of the pipe. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the internal structure of the adaptive grinding head assembly of this utility model.
[0016] Figure 2 This is an exploded view of the cross coupling in the adaptive grinding head assembly of this utility model.
[0017] Figure 3 This is a schematic diagram of the internal structure of the positioning component in the adaptive grinding head assembly of the second embodiment of the present invention.
[0018] In the picture: 1. Handle; 2. Connecting sleeve; 21. Cylinder; 22. Top cover; 221. First extension; 23. Bottom cover; 231. Second extension; 24. Set screw; 3. Cross coupling; 31. Cross shaft; 311. First slide groove; 312. Second slide groove; 32. First fork; 321. First slide table; 33. Second fork; 331. Second slide table; 4. Tool assembly; 41. Tool disc; 42. Tool shaft; 43. Blade; 44. First thrust bearing; 5. Positioning assembly; 51. Positioning pin; 52. Screw; 53. Smooth rod screw; 531. Threaded part; 532. Smooth rod part; 533. Screw head; 54. Second thrust bearing; 6. Pipe to be processed; 61. Variable diameter part. Detailed Implementation
[0019] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.
[0020] First embodiment: This embodiment discloses an adaptive grinding head assembly.
[0021] like Figure 1 As shown, the adaptive grinding head assembly includes a shank 1, a blade assembly 4, and a connecting assembly.
[0022] The upper end of the handle 1 is connected to a motor, which drives the entire adaptive grinding head assembly to rotate.
[0023] The cutter assembly 4 includes a cutter head 41 and a cutter shaft 42. The cutter head 41 is sleeved and fixed to the lower end of the cutter shaft 42. The cutter blade 43 is fixed to the side of the cutter head 41.
[0024] The connecting assembly includes a connecting sleeve 2 and a cross coupling 3. The connecting sleeve 2 is a hollow structure, and the cross coupling 3 is fitted inside the connecting sleeve 2. The lower end of the cross coupling 3 can slide radially relative to the upper end. Specifically, the lower end of the shank 1 passes through the upper end of the connecting sleeve 2 and is fixedly connected to the upper end of the cross coupling 3, while the upper end of the cutter shaft 42 passes through the lower end of the connecting sleeve 2 and is fixedly connected to the lower end of the cross coupling 3.
[0025] like Figure 1 As shown, exemplarily, the connecting sleeve 2 includes a cylindrical body 21, an upper cover 22, and a lower cover 23. The cylindrical body 21 is vertically arranged and has openings at both the top and bottom. The upper cover 22 is fixed to the upper end of the cylindrical body 21, and the lower cover 23 is fixed to the lower end of the cylindrical body 21. The cylindrical body 21, the upper cover 22, and the lower cover 23 form a cavity for accommodating the cross coupling 3. The upper cover 22 passes through a locking screw to clamp the handle 1, and the lower cover 23 passes through a locking screw to clamp the cutter shaft 42. Figure 2 As shown, the cross coupling 3 includes a cross shaft 31, a first fork 32, and a second fork 33. A first slide 321 is provided at the lower end of the first fork 32, and a first groove 311 is formed at the upper end of the cross shaft 31. The first slide 321 engages with the upper end of the first groove 311 and can slide along the first groove 311. A second slide 331 is provided at the upper end of the second fork 33, and a second groove 312 is formed at the lower end of the cross shaft 31. The second slide 312 engages with the second groove 312 and can slide along the second groove 312. Of course, in other embodiments of this invention, the first slide 321 and the second slide 331 can be respectively located at the upper and lower ends of the cross shaft 31, with the first groove 311 located at the lower end of the first fork 32 and the second groove located at the upper end of the second fork 33, as long as the first slide 321 can slide along the first groove 311 and the second slide 312 can slide along the second groove 312. Preferably, the first slide 321 and the second slide 312 are arranged perpendicular to each other.
[0026] like Figure 1As shown, further, the lower end of the upper cover 22 extends out a first extension 221 into the cylinder 21, and the set screw 24 is screwed into the side of the cylinder 21 and tightened, pressing against the side of the first extension 221. The upper end of the lower cover 23 extends out a second extension 231 into the cylinder 21, and the set screw 24 is screwed into the side of the cylinder 21 and tightened, pressing against the side of the second extension 231, which facilitates the installation and removal of the upper cover 22 and the lower cover 23, and facilitates the replacement of the cross coupling 3.
[0027] like Figure 1 As shown, the adaptive grinding head assembly further includes a first thrust bearing 44, which is sleeved on the outside of the cutter shaft 42. The upper end of the first thrust bearing 44 is connected to the lower end of the connecting sleeve 2, and the lower end is connected to the upper end of the cutter disc 41. The lower cover 23 has a through hole for the cutter shaft 42 to pass through. The first thrust bearing 44 can withstand the axial force during grinding of the cutter assembly 4, and at the same time, it can allow a certain amount of offset of the axis of the cutter assembly 4, reducing the wear between the cutter assembly 4 and the connecting sleeve 2.
[0028] like Figure 1 As shown, the adaptive grinding head assembly further includes a positioning component 5, which includes a positioning post 51. The positioning post 51 extends into the interior of the pipe 6 to be processed, and the outer side of the positioning post 51 is clearance-fitted with the inner wall of the pipe 6 to ensure that the tool assembly 4 is coaxial with the pipe 6. A screw 52 passes through the positioning post 51 and is threadedly connected to the lower end of the tool shaft 42, fixing the positioning post 51 to the tool shaft 42.
[0029] In this embodiment, the shank 1 and the blade assembly 4 are connected by a cross coupling 3. The cross coupling 3 is sleeved in the connecting sleeve 2, so that the upper and lower parts of the cross coupling 3 are connected. During rotation, the lower part of the cross coupling 3 can move radially toward the axis of the pipe relative to the upper part, so that the blade assembly 4 can be nearly coaxial with the pipe, reducing the vibration when the grinding head assembly rotates, extending the service life of the grinding head assembly, and improving the grinding accuracy of the grinding head assembly.
[0030] Second embodiment: Based on the first embodiment, the second embodiment further optimizes and refines the positioning component 5 of the first embodiment.
[0031] like Figure 3As shown, screw 52 is a smooth screw 53. The smooth screw 53 includes a threaded part 531, a smooth part 532 and a head 533 connected from top to bottom. The outer diameter of the head 533 is larger than the outer diameter of the smooth part 532. The outer diameter of the smooth part 532 is larger than the outer diameter of the threaded part 531. The smooth part 532 passes through the positioning post 51 and abuts against the lower end of the cutter shaft 42. The threaded part 531 is threadedly connected to the cutter shaft 42. The positioning assembly 5 also includes a second thrust bearing 54. The second thrust bearing 54 is fixedly sleeved on the outside of the smooth part 532. The upper end is connected to the lower end of the cutter shaft 42, and the lower end is embedded in the upper end of the positioning post 51.
[0032] like Figure 3 As shown, the pipe to be processed 6 further has a diameter reducing part 61 inside, and the lower end of the outer side of the positioning post 51 has an inclined surface. The angle between the inclined surface and the axis of the positioning post is greater than the angle between the diameter reducing part 61 and the axis of the pipe to be processed 6, which increases the insertion depth of the positioning post 51 and prevents the positioning post 51 from getting stuck with the pipe.
[0033] In this embodiment, a smooth rod screw 53 is used, which is threaded to the lower end of the cutter shaft 42. The positioning pin 51 is rotatably sleeved on the smooth rod portion 532 of the smooth rod screw 53. The second thrust bearing 54 is fixedly sleeved on the outside of the smooth rod portion 532. The positioning pin 51 and the second thrust bearing 54 are limited between the screw head 533 and the lower end of the cutter shaft 42. When the adaptive grinding head assembly rotates, the positioning pin 51 contacts the inner wall of the pipe and rotates together, reducing wear between the positioning pin 51 and the inner wall of the pipe. The second thrust bearing 54 allows for a certain offset of the axis of the positioning pin 51, further reducing wear between the positioning pin 51 and the inner wall of the pipe.
[0034] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.
Claims
1. An adaptive polishing head assembly, characterized by, The adaptive grinding head assembly includes: Handle; A cutting tool assembly, comprising a cutting disc and a cutting shaft, wherein the cutting disc is sleeved and fixed to the lower end of the outer side of the cutting shaft, and a cutting blade is fixed to the side of the cutting disc; A connecting assembly, comprising a connecting sleeve and a cross coupling, wherein the connecting sleeve is a hollow structure, the cross coupling is fitted inside the connecting sleeve, and the lower end portion of the cross coupling is capable of sliding radially relative to the upper end portion. The lower end of the shank passes through the upper end of the connecting sleeve and is fixedly connected to the upper end of the cross coupling, while the upper end of the cutter shaft passes through the lower end of the connecting sleeve and is fixedly connected to the lower end of the cross coupling.
2. The self-adapting polishing head assembly of claim 1, wherein: The connecting sleeve includes a cylindrical body, an upper cover, and a lower cover; the cylindrical body is vertically arranged and has openings at both the upper and lower ends; the upper cover is fixed to the upper end of the cylindrical body, and the lower cover is fixed to the lower end of the cylindrical body, the cylindrical body, the upper cover, and the lower cover together form a cavity for accommodating the cross coupling.
3. The self-adapting polishing head assembly of claim 2, wherein: The cross coupling includes a cross shaft, a first fork, and a second fork. A first slide is provided at the lower end of the first fork, and a first groove is provided at the upper end of the cross shaft. The first slide is engaged with the upper end of the first groove and can slide along the first groove. A second slide is provided at the upper end of the second fork, and a second groove is provided at the lower end of the cross shaft. The second slide is engaged with the second groove and can slide along the second groove.
4. The self-adapting polishing head assembly of claim 2, wherein: The lower end of the upper cover extends into the cylinder with a first extension portion, and a set screw is screwed into the side of the cylinder and tightened to press against the side of the first extension portion; the upper end of the lower cover extends into the cylinder with a second extension portion, and a set screw is screwed into the side of the cylinder and tightened to press against the side of the second extension portion.
5. The self-adapting polishing head assembly of claim 1, wherein: The adaptive grinding head assembly also includes a first thrust bearing, which is sleeved on the outside of the cutter shaft, with its upper end connected to the lower end of the connecting sleeve and its lower end connected to the upper end of the cutter disc.
6. The self-adapting polishing head assembly of claim 1, wherein: The adaptive grinding head assembly also includes a positioning component, which includes a positioning post that extends into the interior of the pipe to be processed. The outer side of the positioning post is clearance-fitted with the inner wall of the pipe to be processed. A screw passes through the positioning post and is threadedly connected to the lower end of the cutter shaft.
7. The self-adapting polishing head assembly of claim 6, wherein: The pipe to be processed has a diameter-changing section inside, and the lower outer end of the positioning column has an inclined surface. The angle between the inclined surface and the axis of the positioning column is greater than the angle between the diameter-changing section and the axis of the pipe to be processed.
8. The self-adapting polishing head assembly of claim 7, wherein: The screw is a smooth screw, which includes a threaded portion, a smooth portion, and a head connected sequentially from top to bottom. The outer diameter of the head is larger than the outer diameter of the smooth portion, and the outer diameter of the smooth portion is larger than the outer diameter of the threaded portion. The smooth portion passes through the positioning post and abuts against the lower end of the cutter shaft. The threaded portion is threadedly connected to the cutter shaft. The positioning assembly also includes a second thrust bearing, which is fixedly sleeved on the outside of the smooth portion. Its upper end is connected to the lower end of the cutter shaft, and its lower end is embedded in the upper end of the positioning post.