Waterproof drum-type center frame

Abstract

The utility model discloses a waterproof drum-type center frame, which relates to the technical field of center frames and comprises a base and two drum components. The roller assembly comprises a fixed seat and a waterproof roller; the waterproof roller comprises a roller shaft, a roller shell, a plurality of bearings and two waterproof layers; the roller shaft is fixed on the fixed seat; the roller shaft is sleeved with the bearing; the roller shaft is fixed with the inner ring of the bearing; the roller shell is in a cylindrical tube shape. The inner wall of the cylindrical pipe of the roller shell is fixed with the outer ring of the bearing; the bearing is arranged between the two waterproof layers in the extending direction of the axis of the roller shaft; the waterproof layer is provided with a cylindrical outer wall; the outer wall of the waterproof layer is attached and fixed to the inner wall of the cylindrical pipe of the roller shell; a rotating hole is formed in the waterproof layer; the roller shaft is in clearance fit with the rotating hole. According to the waterproof drum-type center frame, the problem that in the prior art, the cylindrical outer wall of the workpiece and the drum of the center frame slide relatively, and machining is affected is solved, and the situation that the workpiece and the drum slide relatively can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of center frames, in particular to a waterproof roller-type center frame. Background Art

[0002] A roller-type steady rest is a steady rest used to secure workpieces with cylindrical outer walls. Prior art applications, such as those in Chinese Patent Application No. 201420543047.8, disclose a vacuum roller steady rest that provides a steady rest for securing workpieces with cylindrical outer walls. This steady rest can be used to secure deep-hole workpieces (with cylindrical outer walls).

[0003] When grinding deep-hole workpieces, the outer wall of the deep-hole workpiece is supported on the outer wall of the roller of the roller-type center frame, and the workpiece is driven and rotated by external equipment (for example, the outer wall of the workpiece cylinder is tangent to a driving wheel that can be actively rotated, and the rotation of the driving wheel is used to drive the workpiece to rotate; the rotating shaft is the axis of the inner hole of the workpiece, and the outer wall of the workpiece is tangent to the outer wall of the roller of the center frame during the rotation, and the outer wall of the workpiece and the outer wall of the roller are statically rubbed), and then a grinding tool (such as a grinding wheel) is used to contact the inner wall of the inner hole of the workpiece, thereby realizing the grinding process between the grinding tool and the inner wall of the inner hole of the workpiece.

[0004] During the above-mentioned processing, the workpiece often sluggishly rotates. Upon inspection, it is found that this is because of the relative sliding between the workpiece and the roller, which affects the grinding effect of the contact point between the grinding tool and the inner wall of the workpiece; the relative sliding between the workpiece and the roller is due to the insensitive rotation of the roller of the center frame. There are two main reasons for the insensitive rotation of the roller. One is the accumulation of water inside the roller, which hinders the rotation of the roller. The other is that the structure of the roller is a roller bearing plus an outer cylinder. The inner ring of the bearing fixes the roller shaft, and the outer ring of the roller fixes the outer cylinder. The roller shaft is fixed, and the workpiece is in contact with the outer cylinder. When the bearing is rusted, it will affect the rotation between the roller shaft and the outer cylinder.

[0005] The accumulation of water in the drum and the rust of the bearings are both because when processing the workpiece, coolant needs to be used to cool the workpiece at all times, and the coolant can easily enter the drum, causing water accumulation in the drum; and the bearings in the drum are corroded by the coolant due to long-term contact with the coolant. Utility Model Content

[0006] In order to solve the above technical problems, the utility model provides a waterproof roller-type center frame, which can reduce the occurrence of relative sliding between the workpiece and the roller.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0008] The utility model provides a waterproof roller-type center frame, comprising a base and two roller assemblies; the roller assembly comprises a fixing seat and a waterproof roller; the fixing seat is fixed on the base; the waterproof roller is fixed on the fixing seat; the waterproof roller shafts of the two roller assemblies are horizontal; the two waterproof roller shafts are of the same height and parallel; the waterproof roller comprises a roller shaft, a roller shell, a plurality of bearings and two waterproof layers; the roller shaft is fixed on the fixing seat; the bearing is sleeved on the roller shaft; the roller shaft is fixed to the inner ring of the bearing; the roller shell is cylindrical; the inner wall of the cylindrical tube of the roller shell is fixed to the outer ring of the bearing; the waterproof layer is arranged at both ends of the cylindrical tube of the roller shell; the bearing is arranged between the two waterproof layers in the extension direction of the axis of the roller shaft; the waterproof layer has a cylindrical outer wall; the outer wall of the waterproof layer is fixed to the inner wall of the cylindrical tube of the roller shell; a rotation hole is opened on the waterproof layer; the roller shaft passes through the rotation hole; the roller shaft and the rotation hole are gap-fitted.

[0009] The utility model provides a waterproof roller-type center frame, preferably, the waterproof layer includes a water baffle; the water baffle is in a frustum shape; the frustum axis of the water baffle is coaxial with the axis of the bearing; the upper bottom surface area of ​​the frustum of the water baffle is smaller than the lower bottom surface area of ​​the frustum of the water baffle; the upper bottom surface of the frustum of the water baffle faces the bearing.

[0010] The waterproof drum-type center frame provided by the present invention is preferably such that the bottom surface of the frustum of the water baffle is coplanar with the bottom surface of the cylindrical tube of the drum shell; the circular diameter of the bottom surface of the frustum of the water baffle is smaller than the tube diameter of the cylindrical tube of the drum shell.

[0011] The waterproof roller-type center frame provided by the utility model, preferably, the waterproof layer also includes a rest block; the rest block is an annular cylindrical shape; the annular cylindrical axis of the rest block is coaxial with the bearing axis; the rest block is fixed to the outer ring of the bearing; the outer circle diameter of the annular cylindrical shape of the rest block is larger than the outer ring diameter of the bearing; the outer circle diameter of the rest block is smaller than the circular diameter of the upper bottom surface of the water baffle; the outer ring of the bearing is transitionally fitted with the roller shell; the rest block is interference fit with the roller shell; a cylindrical accommodating groove is provided at the end of the roller shell; the cylindrical upper bottom surface of the rest block is fixed with the outer ring of the bearing; the cylindrical lower bottom surface of the rest block is flush with the bottom of the accommodating groove; the depth of the accommodating groove is equal to the thickness and length of the water baffle; the circular diameter of the cylindrical bottom surface of the accommodating groove is larger than the circular diameter of the lower bottom surface of the truncated cone of the water baffle; the truncated cone bottom surface of the water baffle is fixed to the bottom of the accommodating groove.

[0012] The waterproof roller-type center frame provided by the present invention preferably comprises a fixed seat including a slider and a slide rail; the slider is slidably fixed on the slide rail; the waterproof roller is fixed on the slider; the extension direction of the slide rail is perpendicular to the axis of the roller shaft; and the extension direction of the slide rail is horizontal.

[0013] The above technical solution has the following advantages or beneficial effects:

[0014] The utility model discloses a waterproof roller-type center frame, which relates to the technical field of center frames and includes a base and two roller assemblies; the roller assembly includes a fixed seat and a waterproof roller; the fixed seat is fixed on the base; the waterproof roller is fixed on the fixed seat; the waterproof roller shafts of the two roller assemblies are horizontal; the two waterproof roller shafts are consistent in height and parallel; the waterproof roller includes a roller shaft, a roller shell, a plurality of bearings and two waterproof layers; the roller shaft is fixed on the fixed seat; the bearing is sleeved on the roller shaft; the roller shaft is fixed to the inner ring of the bearing; the roller shell is cylindrical; the inner wall of the cylindrical tube of the roller shell is fixed to the outer ring of the bearing; the waterproof layer is arranged at both ends of the cylindrical tube of the roller shell; the bearing is arranged between the two waterproof layers in the extension direction of the axis of the roller shaft; the waterproof layer has a cylindrical outer wall; the outer wall of the waterproof layer is fixed to the inner wall of the cylindrical tube of the roller shell; a rotation hole is opened on the waterproof layer; the roller shaft passes through the rotation hole; the roller shaft and the rotation hole are gap-fitted. The waterproof roller-type center frame provided by the utility model solves the problem in the prior art that the cylindrical outer wall of the workpiece and the roller of the center frame slide relative to each other, thereby affecting processing, and can reduce the occurrence of relative sliding between the workpiece and the roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention and its features, features, configurations, and advantages will become more apparent upon reading the detailed description of the following non-limiting embodiments with reference to the accompanying drawings. Like reference numerals indicate like parts throughout the drawings. The drawings are not drawn to scale, with emphasis placed on illustrating the subject matter of the present invention.

[0016] Figure 1 This is a schematic diagram of the overall structure of the waterproof roller-type center frame provided in Example 1 of the present utility model.

[0017] Figure 2 This is a schematic diagram of the waterproof drum structure of the waterproof drum-type center frame provided in Example 1 of the present utility model.

[0018] Figure 3 It is a structural schematic diagram of the waterproof roller of the waterproof roller-type center frame provided by Example 1 of the utility model without the waterproof layer.

[0019] Figure 4 This is a structural schematic diagram of the waterproof roller of the waterproof roller-type center frame provided by Example 1 of the present utility model without the roller shell.

[0020] Figure 5 It is a schematic structural diagram of the abutment block of the waterproof roller of the waterproof roller-type center frame provided in Example 1 of the present utility model.

[0021] Figure 6 This is a schematic structural diagram of the fixing base of the waterproof roller-type center frame provided in Example 1 of the present utility model. DETAILED DESCRIPTION

[0022] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other. It should be noted that the terms used in this utility model are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to this application.

[0023] The following describes the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. It is obvious that the embodiments described are only some of the embodiments of the present invention, rather than all of the embodiments. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0024] Example 1:

[0025] The waterproof roller-type center frame provided in Example 1 of the present utility model is as follows: Figures 1 to 6As shown, it includes a base 1 and two roller assemblies 2; the roller assembly 2 includes a fixed seat 21 and a waterproof roller 22; the fixed seat 21 is fixed on the base 1; the waterproof roller 22 is fixed on the fixed seat 21; the rotation axes of the waterproof rollers 22 of the two roller assemblies 2 are horizontal; the rotation axes of the two waterproof rollers 22 are consistent in height and parallel; the waterproof roller 22 includes a roller shaft 221, a roller shell 222, a plurality of bearings 223 and two waterproof layers 224; the roller shaft 221 is fixed on the fixed seat 21; the bearing 223 is sleeved on the roller shaft 221; the roller shaft 221 is fixed to the inner ring 2231 of the bearing 223; the roller The drum shell 222 is in the shape of a cylindrical tube; the inner wall of the cylindrical tube of the drum shell 222 is fixed to the outer ring 2232 of the bearing 223; the waterproof layer 224 is arranged at both ends of the cylindrical tube of the drum shell 222; the bearing 223 is arranged between the two waterproof layers 224 in the axial extension direction of the roller shaft 221; the waterproof layer 224 has a cylindrical outer wall; the cylindrical outer wall of the waterproof layer 224 is fixed to the inner wall of the cylindrical tube of the drum shell 222; a rotating hole 2241 is opened on the waterproof layer 224; the roller shaft 221 passes through the rotating hole 2241; the roller shaft 221 and the rotating hole 2241 are clearance-fitted.

[0026] The waterproof drum-type center frame provided in Example 1 of the present invention fixes a tubular workpiece with a cylindrical outer wall on the waterproof drum 22 when working, so that the cylindrical outer wall of the workpiece is tangent to the outer wall of the waterproof drum 22, that is, the outer wall of the drum opening 222, thereby fixing the axis of the workpiece, and grinding the workpiece by rotating the workpiece and using a grinding tool to contact the inner wall of the tube hole of the workpiece. During the processing, it is necessary to continuously spray coolant on the workpiece; compared with the prior art, the coolant can directly enter the inner wall of the drum shell 222 through the openings at both ends of the drum shell 222, thereby causing water to accumulate in the drum shell 222, affecting the rotation of the drum shell 222 relative to the roller shaft 221. The difference is that in this embodiment, waterproof layers 224 are provided at both ends of the cylindrical tube of the drum shell 222, waterproof The layer 224 is in contact with the inner wall of the cylindrical tube of the roller shell 222, and a rotating hole 2241 is provided on the waterproof layer 224 to fit with the roller shaft 221 in a clearance manner. This makes the bearing 223, which was originally directly exposed to the outside, blocked by the waterproof layer 224. Therefore, compared with the existing technology, the coolant is not easy to enter the roller shell 222 due to the blocking of the coolant by the waterproof layer 224. Therefore, the occurrence of the situation where the roller rotation is hindered by water accumulation in the roller shell 222 can be reduced, thereby reducing the relative friction between the workpiece and the roller shell 222 caused by the workpiece being driven to rotate but the roller shell 222 not rotating. The normal rotation of the roller shell 222 during the grinding process is conducive to the normal progress of the processing technology. The water accumulation in the roller shell 222 is reduced, which can extend the maintenance cycle of the center frame.

[0027] The utility model discloses a waterproof drum type center frame provided by the embodiment 1, solves the problem that the relative sliding of the cylindrical outer wall of workpiece and the drum of center frame in prior art affects machining, and can reduce the occurrence of relative sliding between workpiece and drum.

[0028] In order to ensure the relative rotation between the drum shell 222 and the roller shaft 221, a gap must exist between the drum shell 222 and the roller shaft 221, that is, the rotating hole 2241 on the waterproof layer 224 in the embodiment (the waterproof layer 224 is fixed with the drum shell 222, and the waterproof layer 223 rotates with the drum shell 222 when the drum shell 222 rotates relative to the roller shaft 221), in the embodiment, the waterproof layer 224 includes a water baffle 3; the water baffle 3 is a circular truncated cone; the axis of the circular truncated cone of the water baffle 3 is coaxial with the axis of the bearing 223; the upper bottom surface area of the circular truncated cone of the water baffle 3 is smaller than the lower bottom surface area of the circular truncated cone of the water baffle 3; and the upper bottom surface of the circular truncated cone of the water baffle 3 faces the bearing 223. The rotating hole 2241 penetrates the waterproof layer 224, and the waterproof drum 22 is kept rotating during the grinding process of the workpiece; after the cooling liquid enters the drum shell 222 from the rotating hole 2241, the water in the drum shell 222 of the waterproof drum 22 moves away from the rotation axis of the drum shell 222 due to the centrifugal force, that is, flows along the inner wall of the drum shell 222; the centrifugal force is directed away from the rotation axis of the drum shell 222, and the centrifugal force drives the cooling liquid to flow along the side wall of the circular truncated cone of the water baffle 3 (if the water baffle 3 is a circular cylinder, the cooling liquid driven by the centrifugal force may flow towards the inside of the drum shell 222, that is, the bearing, when the cooling liquid contacts the side wall of the circular cylinder of the water baffle 3; in the embodiment, the water baffle 3 is a circular truncated cone, so the cooling liquid driven by the centrifugal force flows along the side wall of the circular truncated cone of the water baffle 3 preferentially, and the flow direction is away from the axis of the circular truncated cone of the water baffle 3; since the lower bottom surface of the water baffle 3 is directed away from the bearing, the cooling liquid flows away from the bearing 223, and thus flows out of the drum shell 222.

[0029] In order to avoid the cylindrical inner wall of the drum shell 222 blocking the cooling liquid flowing along the side wall of the circular truncated cone of the water baffle 3, in the embodiment, the lower bottom surface of the circular truncated cone of the water baffle 3 is coplanar with the bottom surface of the cylindrical tube of the drum shell 222; and the diameter of the lower bottom surface of the circular truncated cone of the water baffle 3 is smaller than the tube diameter of the cylindrical tube of the drum shell 222. When the cooling liquid flows along the side wall of the circular truncated cone of the water baffle 3 to the lower bottom surface of the water baffle 3, the cooling liquid is already outside the drum shell 222.

[0030] To further prevent the coolant from contacting the bearing 223, as a preferred solution, in this embodiment, the waterproof layer 224 further includes a contact block 4; the contact block 4 is annular cylindrical; the axis of the annular cylindrical shape of the contact block 4 is coaxial with the axis of the bearing 223; the contact block 4 is fixed to the outer ring of the bearing 223; the outer diameter of the annular cylindrical shape of the contact block 4 is larger than the outer ring diameter of the bearing 223; the outer diameter of the contact block 4 is smaller than the diameter of the upper bottom surface of the water baffle 3; the outer ring of the bearing 223 is transitionally fitted with the drum housing 222; The abutment block 4 is interference fit with the drum shell 222; a cylindrical receiving groove 2221 is provided at the end of the drum shell 222; the cylindrical upper bottom surface of the abutment block 4 is fixed to the outer ring of the bearing 223; the cylindrical lower bottom surface of the abutment block 4 is flush with the bottom of the receiving groove 2221; the depth of the receiving groove 2221 is equal to the thickness and length of the water baffle 3; the circular diameter of the cylindrical bottom surface of the receiving groove 2221 is larger than the circular diameter of the lower bottom surface of the truncated cone of the water baffle 3; the upper bottom surface of the truncated cone of the water baffle 3 is abutted and fixed to the bottom of the receiving groove 2221. The circular hole of the annular cylindrical abutment block 4 is for the passage of the roller shaft 221. The outer wall of the annular column of the abutment block 4 is interference fit with the inner wall of the roller shell 222. The interference fit can reduce the gap between the abutment block 4 and the inner wall of the roller shell 222, and reduce the coolant flowing through between the abutment block 4 and the roller shell 222 and flowing to the bearing 3; the interface between the abutment block 4 and the roller shell 222, and the edge facing the side of the water baffle 3, directly contact the upper bottom panel surface of the water baffle 3. This structure makes it possible for the coolant to enter the gap between the abutment block and the roller shell 222. It must first enter the contact surface between the water baffle 3 and the bottom of the accommodating groove 2221, which requires multiple special operations for the coolant to enter the contact bearing 223. Therefore, the arrangement of the abutment block 4 in this embodiment can further reduce the coolant entering the roller shell 222 and affecting the bearing 223 therein, thereby reducing the occurrence of rust on the bearing 223 due to contact with the coolant.

[0031] As a preferred solution, in this embodiment, the fixed base 21 includes a slider 211 and a slide rail 212; the slider 211 is slidably fixed to the slide rail 212; the waterproof roller 22 is fixed to the slider 211; the slide rail 212 extends in a direction perpendicular to the axis of the roller shaft 221; and the slide rail 212 extends in a horizontal direction. The waterproof rollers 22 of the two roller assemblies fixed to the slider 211 can be positioned relative to each other by changing the position of the two waterproof rollers 22 (the specific method of moving and fixing the slider 211 relative to the slide rail 212 is conventional and will not be elaborated here) to adapt to workpieces with cylindrical outer walls of different diameters.

[0032] In summary, the utility model discloses a waterproof roller-type center frame, which relates to the technical field of center frames, including a base and two roller assemblies; the roller assembly includes a fixed seat and a waterproof roller; the fixed seat is fixed on the base; the waterproof roller is fixed on the fixed seat; the waterproof roller shafts of the two roller assemblies are horizontal; the two waterproof roller shafts are of the same height and parallel; the waterproof roller includes a roller shaft, a roller shell, a plurality of bearings and two waterproof layers; the roller shaft is fixed on the fixed seat; the bearing is sleeved on the roller shaft; the roller shaft is fixed to the inner ring of the bearing; the roller shell is cylindrical; the inner wall of the cylindrical tube of the roller shell is fixed to the outer ring of the bearing; the waterproof layer is arranged at both ends of the cylindrical tube of the roller shell; the bearing is arranged between the two waterproof layers in the extension direction of the axis of the roller shaft; the waterproof layer has a cylindrical outer wall; the outer wall of the waterproof layer is fixed to the inner wall of the cylindrical tube of the roller shell; a rotation hole is opened on the waterproof layer; the roller shaft passes through the rotation hole; the roller shaft and the rotation hole are gap-fitted. The waterproof roller-type center frame provided by the utility model solves the problem in the prior art that the cylindrical outer wall of the workpiece and the roller of the center frame slide relative to each other, thereby affecting processing, and can reduce the occurrence of relative sliding between the workpiece and the roller.

[0033] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformation made using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, is also included in the patent protection scope of the present invention.

Claims

1. A waterproof roller-type center frame, comprising a base and two roller assemblies; The roller assembly includes a fixing seat and a waterproof roller; The fixing seat is fixed on the base; the waterproof roller is fixed on the fixing seat; the waterproof roller shafts of the two roller assemblies are horizontal; the two waterproof roller shafts are at the same height and parallel; It is characterized in that The waterproof roller includes a roller shaft, a roller shell, several bearings and two waterproof layers; The roller is fixed on the fixing seat; The bearing is sleeved on the roller shaft; the roller shaft is fixed to the inner ring of the bearing; The drum shell is in the shape of a cylindrical tube; the inner wall of the cylindrical tube of the drum shell is fixed to the outer ring of the bearing; The waterproof layer is provided at both ends of the cylindrical tube of the drum shell; The bearing is arranged between the two waterproof layers in the extending direction of the axis of the roller; The waterproof layer has a cylindrical outer wall; the outer wall of the waterproof layer is fixed against the inner wall of the cylindrical tube of the drum shell; a rotating hole is opened on the waterproof layer; the roller shaft passes through the rotating hole; the roller shaft and the rotating hole are loosely matched.

2. The waterproof roller-type center frame according to claim 1, characterized in that: The waterproof layer includes a water retaining plate; the water retaining plate is in a truncated cone shape; the axis of the truncated cone of the water retaining plate is coaxial with the axis of the bearing; the upper bottom surface area of ​​the truncated cone of the water retaining plate is smaller than the lower bottom surface area of ​​the truncated cone of the water retaining plate; the upper bottom surface of the truncated cone of the water retaining plate faces the bearing.

3. The waterproof roller-type center frame according to claim 2, characterized in that: The bottom surface of the truncated cone of the water baffle is coplanar with the bottom surface of the cylindrical tube of the drum shell; The circular diameter of the bottom surface of the truncated cone of the water baffle is smaller than the tube diameter of the cylindrical tube of the drum shell.

4. The waterproof roller-type center frame according to claim 2, characterized in that: The waterproof layer also includes abutment blocks; The abutment block is annular and cylindrical; the annular and cylindrical axis of the abutment block is coaxial with the axis of the bearing; the abutment block is fixed to the outer ring of the bearing; The outer diameter of the cylindrical ring of the abutment block is larger than the outer ring diameter of the bearing; the outer diameter of the abutment block is smaller than the upper bottom surface diameter of the water baffle; The outer ring of the bearing is in transitional fit with the outer shell of the drum; the abutment block is in interference fit with the outer shell of the drum; A cylindrical receiving groove is provided at the end of the drum shell; The cylindrical upper bottom surface of the abutment block is fixed to the outer ring of the bearing; the cylindrical lower bottom surface of the abutment block is flush with the bottom of the accommodating groove; The depth of the receiving groove is equal to the thickness and length of the water retaining plate; The circular diameter of the cylindrical bottom surface of the accommodating groove is larger than the circular diameter of the lower bottom surface of the truncated cone of the water baffle plate; the upper bottom surface of the truncated cone of the water baffle plate is fixed against the bottom of the accommodating groove.

5. The waterproof roller-type center frame according to claim 1, characterized in that: The fixing seat includes a slider and a slide rail; The slider can be slidably fixed on the slide rail; The waterproof roller is fixed on the slider; The extending direction of the slide rail is perpendicular to the axis of the roller shaft; the extending direction of the slide rail is horizontal.

Images