Quick-change center stand support roller

Abstract

The utility model discloses a kind of center frame supporting roller sleeve of quick replacement, including supporting roller outer roller sleeve assembly, its both sides are equipped with connecting fastening assembly, roller sleeve assembly contains two groups of symmetrical half roller sleeve, and connecting surface has symmetrical connecting groove;Connecting fastening assembly contains fixed connection strip and fastening connection strip, respectively in two side connecting groove connection half roller sleeve two ends, the two groups of connecting blocks of fastening connection strip are telescopic, adjust spacing and half roller sleeve distance by up-down adjusting bolt;Adopt split half roller sleeve design, cooperate with the connecting strip that can be independently disassembled, without disassembling supporting roller for replacement, just disassemble adjusting screw, fixed knob and connecting strip, can, greatly shorten replacement time, reduce downtime loss;By adjusting bolt change connecting block spacing, can be adapted to different specifications supporting roller, improve universality, reduce procurement and inventory cost.

Description

Technical Field

[0001] This utility model specifically relates to a quick-change center frame support roller sleeve. Background Technology

[0002] In the field of machining, the center rest, as a key auxiliary component of machine tools, is widely used in turning, grinding, and milling of workpieces such as slender shafts and stepped shafts. Its core function is to provide stable support for the workpiece through the rolling contact between the support roller sleeve and the outer diameter of the workpiece, effectively counteracting the radial force and cutting torque generated during machining, and preventing problems such as bending and vibration of the workpiece due to insufficient rigidity, thereby ensuring machining accuracy and surface quality. As the actuator that directly contacts the workpiece with the center rest, the support roller sleeve is subjected to harsh conditions of alternating loads, friction and wear, and chip impact for a long time. It is a typical consumable part, and its surface accuracy and structural integrity directly determine the support effect of the center rest and the machining quality of the workpiece.

[0003] Currently, the assembly of the center support roller sleeve and roller shaft mainly adopts interference fit or bolt fastening structure. To ensure structural stability during the support process, interference fit usually requires heat fitting, cold pressing or other processes to achieve a tight connection between the roller sleeve and roller shaft, while bolt fastening structure requires multiple axially distributed bolts to lock the roller sleeve to the end of the roller shaft. When the roller sleeve fails due to wear, scratches or other reasons, the disassembly process requires special tools to separate the interference fit structure, or to remove the fastening bolts and positioning components one by one, which is cumbersome and time-consuming. Especially in lathes, grinding machines and other equipment, the center support is usually installed in a narrow space between the machine tool guide and the workpiece, and the disassembly and assembly operations are more significantly restricted by space, further reducing the replacement efficiency.

[0004] Therefore, it is necessary to invent a quick-change center support roller sleeve to solve the above problems. Utility Model Content

[0005] (a) Purpose of the utility model To address the technical problems existing in the background art, this utility model proposes a quick-change center frame support roller sleeve.

[0006] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: a quick-replaceable center frame support roller sleeve, including a roller sleeve assembly disposed outside the support roller, wherein connecting and fastening components are provided inside both sides of the roller sleeve assembly; The roller sleeve assembly includes two sets of symmetrically connected half roller sleeves, and the connecting surfaces of the two sets of half roller sleeves are provided with symmetrical connecting grooves. The connecting fastening assembly includes a fixed connecting strip and a fastening connecting strip. The fixed connecting strip and the fastening connecting strip are respectively installed in the connecting grooves on both sides to connect the two ends of the two sets of half roller sleeves. The fastening connecting strip includes two sets of mutually telescopic connecting blocks. The upper and lower sides of the two sets of connecting blocks are provided with adjusting bolts. The adjusting bolts adjust the distance between the two sets of connecting blocks, that is, adjust the distance between the two sets of half roller sleeves.

[0007] Preferably, the two sets of connecting blocks are nested together, and each set of connecting blocks has an adjustment hole on one side. The adjustment bolt is installed in the adjustment holes on both sides, and a nut fixing hole is provided on the outside of the adjustment hole. The adjustment bolt includes a fixing nut provided in the nut fixing hole on both sides, and the adjustment bolt is connected to the fixing nuts on both sides.

[0008] Preferably, the adjusting hole and the nut fixing hole are both located outside the half roller sleeve. One set of connecting blocks has a telescopic groove inside and a limiting frame at the groove opening. The other set of connecting blocks is hollow inside and has a limiting strip matching the limiting frame at its end edge. One set of connecting blocks moves and extends inside the other set of connecting blocks.

[0009] Preferably, the top of the fixing connecting strip is provided with a connecting stud, the connecting stud is equipped with a fixing knob, and the bottom sides of the fixing connecting strip extend outwards with baffles.

[0010] Preferably, the overall dimensions of the fixing connecting strip and the fastening connecting strip match the dimensions of the connecting groove, and both are T-shaped. The dimension of the connecting groove to which the fixing connecting strip connects is larger than the dimension of the connecting groove to which the fastening connecting strip connects on the other side.

[0011] Preferably, both ends of the two sets of connecting blocks extend beyond the upper and lower surfaces of the half roller sleeve, and the adjusting bolts are all located outside the half roller sleeve.

[0012] Preferably, all of the connecting slots are provided through the entire space.

[0013] Compared with the prior art, the beneficial effects of the above-mentioned technical solution of this utility model are: 1. This utility model adopts a split half-roller sleeve design, with independently detachable fixing and fastening connecting strips. When replacing, there is no need to disassemble the support roller. Only the adjusting bolts and fixing knobs need to be removed, and the connecting strips can be pulled out to remove the old half-roller sleeve. After installing the new roller sleeve, it can be quickly fixed by the connecting components. This reduces the time of the entire replacement process, improves the replacement efficiency, significantly reduces equipment downtime, and reduces economic losses caused by production interruption. 2. The two sets of nested connecting blocks of this utility model can change the spacing by adjusting the bolts, thereby adjusting the opening and closing degree of the two sets of half roller sleeves. It can adapt to support rollers of different specifications, eliminating the need to customize roller sleeves for each size of support roller, greatly improving the versatility of the equipment, reducing the number of roller sleeves purchased and inventory pressure, and reducing the enterprise's equipment investment and operating costs. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the disassembled half-roller sleeve structure of this utility model; Figure 3 This is a schematic diagram of the split structure of one side of the half roller sleeve of this utility model; Figure 4 This is a schematic diagram of the disassembled structure of the fastening connecting strip of this utility model; Figure 5 This is a schematic diagram of the split structure of the connecting block end of this utility model.

[0016] Explanation of reference numerals in the attached figures: 1. Support roller; 2. Roller sleeve assembly; 21. Half roller sleeve; 22. Connecting groove; 3. Connecting fastening assembly; 31. Fixing connecting strip; 311. Connecting stud; 312. Fixing knob; 313. Stop bar; 32. Fastening connecting strip; 33. Connecting block; 331. Expansion groove; 332. Limiting frame; 333. Limiting strip; 34. Adjusting bolt; 35. Adjusting hole; 36. Nut fixing hole; 37. Fixing nut. Detailed Implementation

[0017] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0018] This utility model provides, for example Figure 1-4 The center frame support roller sleeve shown includes a roller sleeve assembly 2 disposed outside the support roller 1, and connecting fastening assemblies 3 are provided inside both sides of the roller sleeve assembly 2. Specifically, the roller sleeve assembly 2 includes two sets of symmetrically connected half roller sleeves 21, and the connecting surfaces of the two sets of half roller sleeves 21 are provided with symmetrical connecting grooves 22. Specifically, the fastening assembly 3 includes a fixed connecting strip 31 and a fastening connecting strip 32. The fixed connecting strip 31 and the fastening connecting strip 32 are respectively installed in the connecting grooves 22 on both sides to connect the two ends of the two sets of half roller sleeves 21. The fastening connecting strip 32 includes two sets of mutually telescopic connecting blocks 33. The upper and lower sides of the two sets of connecting blocks 33 are provided with adjusting bolts 34. The adjusting bolts 34 adjust the distance between the two sets of connecting blocks 33, that is, adjust the distance between the two sets of half roller sleeves 21.

[0019] Specifically, two sets of connecting blocks 33 are nested together, and each set of connecting blocks 33 has an adjustment hole 35 on one side. The adjustment bolt 34 is installed in the adjustment holes 35 on both sides, and the adjustment holes 35 have nut fixing holes 36 on the outside. The adjustment bolt 34 includes fixing nuts 37 set in the nut fixing holes 36 on both sides, and the adjustment bolt 34 is connected to the fixing nuts 37 on both sides.

[0020] Specifically, the adjusting hole 35 and the nut fixing hole 36 are both located outside the half roller sleeve 21. A set of connecting blocks 33 has a telescopic groove 331 inside, and a limiting frame 332 is provided at the groove opening. The other set of connecting blocks 33 is hollow inside, and its end edge is provided with a limiting strip 333 that matches the limiting frame 332. A set of connecting blocks 33 moves and extends inside the other set of connecting blocks 33.

[0021] Specifically, the top of the fixed connecting strip 31 is provided with a connecting stud 311, the connecting stud 311 is equipped with a fixing knob 312, and the bottom sides of the fixed connecting strip 31 have baffles 313 extending outward.

[0022] Specifically, the overall dimensions of the fixed connecting strip 31 and the fastening connecting strip 32 match the dimensions of the connecting groove 22, and both are T-shaped. The size of the connecting groove 22 connected by the fixed connecting strip 31 is larger than the size of the connecting groove 22 connected by the fastening connecting strip 32 on the other side.

[0023] Specifically, both ends of the two sets of connecting blocks 33 extend beyond the upper and lower surfaces of the half roller sleeve 21, and the adjusting bolts 34 are all located on the outside of the half roller sleeve 21.

[0024] Specifically, multiple connecting slots 22 are all provided through the entire structure.

[0025] In this embodiment, the standardized processing of the support roller 1 is completed to ensure that the accuracy of its outer circular surface meets the requirements of the center frame; the roller sleeve assembly 2 is processed and divided into two sets of symmetrical half roller sleeves 21, which are made of high-strength alloy material to ensure that the fit error between the inner wall of the half roller sleeve 21 and the outer circle of the support roller 1 is small.

[0026] Specifically, symmetrical connecting grooves 22 are opened on the connecting surfaces of the two sets of half roller sleeves 21. The connecting grooves 22 penetrate the upper and lower end faces of the half roller sleeves 21 and are divided into two sizes. The size of the connecting groove 22 used for installing and fixing the connecting strip 31 needs to be larger than the connecting groove 22 used for installing and fastening the connecting strip 32. At the same time, the inner wall of the connecting groove 22 is smooth and burr-free to avoid scratching the connecting strip during assembly.

[0027] Specifically, the fixing connecting strip 31 adopts a T-shaped structure design, and its overall size is perfectly matched with the corresponding connecting groove 22; a cylindrical connecting stud 311 is welded to the top of the fixing connecting strip 31, and fine threads are machined on the outer surface of the connecting stud 311, and an internal hexagonal fixing knob 312 is also provided; on both sides of the bottom of the fixing connecting strip 31, rectangular baffles 313 extending outward are made by laser cutting process, and the thickness of the baffles 313 is the same as that of the fixing connecting strip 31.

[0028] Specifically, the fastening connecting strip 32 consists of two sets of nested connecting blocks 33. One set of connecting blocks 33 has a rectangular expansion groove 331 inside, and a metal limiting frame 332 is fixed at the opening of the expansion groove 331 by bolts. The other set of connecting blocks 33 has a hollow structure, and its end edge is integrally formed with a limiting strip 333 that matches the limiting frame 332, ensuring that the two sets of connecting blocks 33 can move stably along the expansion groove 331 without detaching. Through adjustment holes 35 are opened on the upper and lower sides of the two sets of connecting blocks 33, and nut fixing holes 36 are opened on the outside of the half roller sleeve 21 at the position corresponding to the adjustment holes 35. High-strength adjusting bolts 34 and fixing nuts 37 are provided. The fixing nuts 37 are pre-installed in the nut fixing holes 36 and spot-welded to prevent the nuts from rotating during the adjustment process.

[0029] Specifically, two sets of half-roller sleeves 21 are symmetrically attached to the outside of the support roller 1, so that the inner wall of the half-roller sleeve 21 is completely attached to the outer circle of the support roller 1. At this time, the connecting surfaces of the two sets of half-roller sleeves 21 are aligned, and the connecting groove 22 forms a complete T-groove structure. The fixing connecting strip 31 is inserted into the corresponding connecting groove 22 from the top of the half-roller sleeve 21 until the bottom stop strip 313 is attached to the bottom end face of the half-roller sleeve 21. Then, the fixing knob 312 is screwed into the connecting stud 311 and the fixing knob 312 is rotated clockwise until the bottom of the knob is in close contact with the top end face of the half-roller sleeve 21. The pressure of the knob firmly fixes the fixing connecting strip 31 in the connecting groove 22, completing the positioning and fixing of one end of the half-roller sleeve.

[0030] Specifically, insert the two sets of connecting blocks 33 of the fastening connecting strip 32 into the connecting groove 22 on the other side, so that the adjusting holes 35 of the two sets of connecting blocks 33 are aligned with the nut fixing holes 36 on the half roller sleeve 21; insert the adjusting bolt 34 into the adjusting hole 35 from the outside of the half roller sleeve 21 and thread it with the fixing nut 37; at this time, depending on the fit between the support roller 1 and the half roller sleeve 21, rotate the adjusting bolt 34 clockwise or counterclockwise: if there is a gap between the half roller sleeve and the support roller, rotate the adjusting bolt 34 clockwise to push the two sets of connecting blocks 33 closer to each other along the expansion groove 331, reducing the distance between the two sets of half roller sleeves 21 until the inner wall of the half roller sleeve is completely in contact with the support roller; if the half roller sleeve is too tight, rotate the adjusting bolt 34 counterclockwise, and the two sets of connecting blocks 33 move away from each other under the constraint of the limiting frame 332 and the limiting strip 333, increasing the half roller sleeve gap and preventing the support roller from being deformed by pressure; after the adjustment is completed, check the tightness of the adjusting bolt 34 again to ensure that there is no looseness.

[0031] Specifically, use a wrench to rotate the adjusting bolt 34 counterclockwise to move the two sets of connecting blocks 33 away from each other, thus releasing the fastening constraint of the half-roller sleeve 21; then remove the adjusting bolt 34 from the adjusting hole 35, and pull the two sets of connecting blocks 33 out of the connecting groove 22. Use an Allen wrench to rotate the fixing knob 312 counterclockwise until the knob is completely separated from the connecting stud 311; then pull the fixing connecting strip 31 upward from the connecting groove 22. Remove the two sets of old half-roller sleeves 21 from the support roller 1 and replace them with new half-roller sleeves 21. Follow the above overall roller sleeve assembly process to re-install and adjust the fixing connecting strip and the fastening connecting strip to complete the roller sleeve replacement. The entire replacement process does not require disassembling the support roller body.

[0032] In this embodiment, a split half-roller sleeve structure is adopted, along with a quick-release connecting fastening component. When replacing, there is no need to disassemble the support roller; only the connecting strip needs to be removed to complete the disassembly and assembly of the half-roller sleeve. The replacement time is shortened to 20-30 minutes, improving replacement efficiency, significantly reducing equipment downtime, and reducing economic losses caused by production interruptions.

[0033] In this embodiment, the spacing between the two sets of half roller sleeves can be changed by rotating the adjusting bolt through the adjustment function of the fastening connecting strip, which can adapt to support rollers of different sizes with diameter deviations in the range of 5-10mm. There is no need to equip each size of support roller with a separate roller sleeve, which greatly improves the versatility of the equipment and reduces the equipment procurement and inventory costs for enterprises.

[0034] In this embodiment, the stop bar structure of the fixed connecting bar can limit the lateral displacement of the half roller sleeve. Together with the limit frame and limit bar of the fastening connecting bar, it can prevent the half roller sleeve from shifting or shaking during operation, and ensure the support accuracy of the center frame. The cooperation between the adjusting bolt and the fixing nut can precisely control the fit between the half roller sleeve and the support roller, avoiding vibration wear caused by excessively loose fit or stress deformation caused by excessively tight fit, reducing the wear rate of the support roller and the roller sleeve, and reducing the frequency of component replacement and maintenance costs.

[0035] In this embodiment, the connecting fastening assembly adopts a T-shaped structure that matches the connecting groove. With the double fixing of the fixing knob and the adjusting bolt, it ensures that the roller sleeve can remain stable under high-speed rotation conditions without the risk of loosening or falling off. At the same time, all adjusting parts are set on the outside of the half roller sleeve, with ample operating space. No complicated special tools are required. Ordinary operators can complete the assembly and adjustment after simple training, reducing the skill level requirements of the operators and improving the convenience of on-site operation.

[0036] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A quick-change center frame support roller sleeve, characterized in that: It includes a roller sleeve assembly (2) disposed outside the support roller (1), and the roller sleeve assembly (2) has connecting fastening assemblies (3) inside on both sides. The roller sleeve assembly (2) includes two sets of symmetrically connected half roller sleeves (21), and the connecting surfaces of the two sets of half roller sleeves (21) are provided with symmetrical connecting grooves (22). The connecting fastening assembly (3) includes a fixed connecting strip (31) and a fastening connecting strip (32). The fixed connecting strip (31) and the fastening connecting strip (32) are respectively installed in the connecting grooves (22) on both sides to connect the two ends of the two sets of half roller sleeves (21). The fastening connecting strip (32) includes two sets of mutually telescopic connecting blocks (33). The two sets of connecting blocks (33) are provided with adjusting bolts (34) on the upper and lower sides. The adjusting bolts (34) adjust the distance between the two sets of connecting blocks (33), that is, adjust the distance between the two sets of half roller sleeves (21).

2. The quick-change center support roller sleeve according to claim 1, characterized in that: The two sets of connecting blocks (33) are nested together, and each set of connecting blocks (33) has an adjustment hole (35) on one side. The adjustment bolt (34) is installed in the adjustment holes (35) on both sides, and the adjustment holes (35) have nut fixing holes (36) on the outside. The adjustment bolt (34) includes a fixing nut (37) set in the nut fixing holes (36) on both sides. The adjustment bolt (34) is connected to the fixing nuts (37) on both sides.

3. The quick-change center frame support roller sleeve according to claim 2, characterized in that: The adjustment hole (35) and the nut fixing hole (36) are both located outside the half roller sleeve (21). One set of connecting blocks (33) has a telescopic groove (331) inside, and a limiting frame (332) is provided at the groove opening. The other set of connecting blocks (33) is hollow inside, and a limiting strip (333) matching the limiting frame (332) is provided at its end edge. One set of connecting blocks (33) moves and extends inside the other set of connecting blocks (33).

4. The quick-change center support roller sleeve according to claim 1, characterized in that: The top of the fixed connecting strip (31) is provided with a connecting stud (311), a fixing knob (312) is installed on the connecting stud (311), and baffles (313) extend outward from both sides of the bottom of the fixed connecting strip (31).

5. The quick-change center support roller sleeve according to claim 1, characterized in that: The overall dimensions of the fixed connecting strip (31) and the fastening connecting strip (32) match the dimensions of the connecting groove (22), and both are T-shaped. The dimension of the connecting groove (22) connected by the fixed connecting strip (31) is larger than the dimension of the connecting groove (22) connected by the fastening connecting strip (32) on the other side.

6. The quick-change center support roller sleeve according to claim 1, characterized in that: Both ends of the two sets of connecting blocks (33) extend beyond the upper and lower surfaces of the half roller sleeve (21), and the adjusting bolts (34) are all located outside the half roller sleeve (21).

7. The quick-change center support roller sleeve according to claim 1, characterized in that: Multiple connecting slots (22) are provided through each other.

Images