Bearing seat turning machining clamp and machining device

Abstract

The utility model discloses a bearing seat turning clamp and a bearing seat turning device, which belong to the technical field of bearing seat turning, and comprise a shaft head seat assembly, the shaft head seat assembly is a hollow cylindrical structure with openings at two ends, the hollow part of the shaft head seat assembly is a connecting part, and the openings at the two ends of the shaft head seat assembly are respectively a mounting part and a placing part; the collet chuck is arranged at the hollow part in the shaft head seat assembly and is movably connected with the shaft head seat assembly; the collet chuck comprises a collet body, and the collet body is arranged in the connecting part. And the chuck is composed of a plurality of clamping pieces. According to the bearing seat turning clamp, the shaft head seat assembly is fixedly connected with the lathe spindle, and the bearing seat is clamped through the chuck in the collet, so that the bearing seat is fixed and machined, and the technical problem that the bearing seat is easily separated from the clamp during turning machining is solved; the technical effect that clamping is more stable when the bearing seat is turned is achieved.

Description

Technical Field

[0001] This utility model relates to the field of bearing housing turning technology, and in particular to a bearing housing turning fixture and processing device. Background Technology

[0002] Bearing housings are important components in mechanical equipment. (Refer to...) Figure 5 As shown, the bearing housing has a circular bearing mounting cavity in the center and four outwardly extending lugs around it, each with a circular mounting hole. This structure is used in most mechanical transmission systems. Its traditional manufacturing process mainly uses milling machines for milling, but milling is time-consuming and costly, making it difficult to meet the needs of mass production. In recent years, to optimize the production efficiency of bearing housings, the use of CNC lathes for turning has been considered.

[0003] In the existing technology, the turning of bearing housing is usually carried out using the traditional CNC lathe machining method, which directly clamps the outer circle of the bearing housing. However, since the bearing housing has an asymmetrical structure, it is easy for the bearing housing to fall off the fixture due to lateral force or uneven center of gravity during CNC lathe machining. In addition, the clamping part is not the solid part of the bearing housing, which can easily cause the bearing housing to deform during machining. Utility Model Content

[0004] The purpose of this utility model is to solve the problem that the bearing housing is prone to detaching from the fixture during the turning process in the prior art, and to propose a bearing housing turning fixture.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A bearing housing turning fixture includes: a shaft head seat assembly, wherein the shaft head seat assembly is a hollow cylindrical structure with openings at both ends, the hollow part being a connecting part, and the openings at both ends being a mounting part and a placement part, respectively;

[0007] A collet is disposed in the hollow part of the shaft head assembly and is movably connected to the shaft head assembly. The collet is used to clamp and fix the bearing seat.

[0008] The collet includes:

[0009] The cylindrical body is disposed within the connecting portion and is movably connected to the connecting portion. An annular protrusion is provided within the connecting portion, and the protrusion is an abutment ring.

[0010] The chuck has several slits at the opening of the cylinder near the placement part, and the several slits evenly divide the cylinder into several clamping pieces, which together form the chuck.

[0011] Furthermore, the inner wall of the opening of the placement part is provided with a flared inclined surface, and the clamp is inclined near the outer wall of the placement part, with its inclination angle matching the inclined surface at the opening of the placement part.

[0012] Furthermore, adhesive is filled between several of the clips.

[0013] Furthermore, the shaft head assembly is also provided with a counterweight block, which is located on the placement part and fixedly connected to the placement part.

[0014] Furthermore, the chuck is made of spring steel.

[0015] Furthermore, four threaded holes are provided on the end face of the placement part, and bolts are threaded into the threaded holes for auxiliary positioning of the bearing seat.

[0016] A bearing housing machining apparatus is also provided, including any of the bearing housing turning fixtures described above.

[0017] Furthermore, it also includes a cutting tool, which comprises:

[0018] The tool holder is cylindrical in shape, with one end connected to the bearing housing processing device and the other end mounted on a plane. Two fixing grooves are provided at the edge of the mounting plane.

[0019] Two blades are respectively disposed in two fixed slots, and the two blades are in a rhomboid structure.

[0020] The beneficial effects of this utility model are as follows:

[0021] In this application, by setting up a shaft head assembly and fixing it to the lathe spindle, and by using the chuck in the collet to clamp the bearing seat, the bearing seat can be fixed and machined. This solves the technical problem that the bearing seat is easy to fall off the fixture during turning, and achieves a more stable clamping effect during the turning of the bearing seat. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of a bearing housing turning fixture provided in an embodiment of the present utility model;

[0023] Figure 2 This is an exploded structural diagram of a bearing housing turning fixture provided in an embodiment of the present utility model;

[0024] Figure 3 This is a cross-sectional view of a bearing housing turning fixture provided in an embodiment of the present utility model;

[0025] Figure 4 This is a schematic diagram of the cutting tool structure provided in the embodiments of this utility model;

[0026] Figure 5 This is a schematic diagram of the bearing housing structure provided in the background art of this utility model.

[0027] The markings in the diagram are as follows:

[0028] 1. Shaft head assembly; 11. Connecting part; 12. Mounting part; 13. Placement part; 131. Threaded hole; 132. Bolt; 14. Counterweight;

[0029] 2. Collet; 21. Collet body; 22. Chuck;

[0030] 3. Cutting tool; 31. Tool holder; 32. Blade. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0033] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0035] Please refer to Figure 1-3 As shown, in the first aspect of the present invention, a bearing housing turning fixture is provided. In practical applications, it is used to clamp and fix the bearing housing on the lathe spindle during turning. It includes a spindle head assembly 1 and a collet 2 connected to the spindle head assembly 1.

[0036] Specifically, the spindle head assembly 1 is a hollow cylindrical structure with openings at both ends. The hollow part is the connecting part 11, and the two openings at both ends are the mounting part 12 and the placement part 13, respectively. The mounting part 12 is used to connect with the lathe spindle, and the placement part 13 is used to provide a plane for placing the bearing seat. The connecting part 11 is used to connect the mounting part 12 and the placement part 13 and provides a certain degree of flexibility to adapt to bearing seats of different lengths. Furthermore, the spindle head assembly is generally H-shaped, which is wider at both ends and narrower in the middle. This allows the connecting part 11 to provide sufficient area to connect with the lathe spindle, and the mounting part 12 to provide sufficient area for placing the bearing seat. In order to reduce the weight of the spindle head assembly 1, the middle connecting part 11 is narrower to improve the overall assemblability of the spindle head assembly 1.

[0037] The mounting part 12 has several connecting holes. Using a common bolt 132 connection method, the bolts 132 are threaded onto the lathe spindle through the connecting holes, thereby fixing the spindle head assembly 1 onto the lathe spindle. The end face of the opening of the placement part 13 is symmetrically provided with two countersunk holes. These two countersunk holes are positioning holes used to position the bearing seat during placement, preventing burrs on the bearing seat surface from affecting positioning. The inner wall of the opening of the placement part 13 is also provided with a flared inclined surface.

[0038] In some preferred embodiments, the spindle head assembly 1 adopts a one-piece molding structure to increase the spindle head assembly 1's resistance to deformation. For example, during high-speed turning, the machine tool's spindle will generate vibration and impact forces. Compared with a modular structure, the one-piece molding structure can better maintain machining accuracy.

[0039] The collet 2 is disposed in the hollow part of the shaft head assembly 1 and is movably connected to the shaft head assembly 1 with a clearance fit, thereby allowing the collet 2 to slide within the shaft head assembly 1. The collet 2 is used to clamp and fix the bearing seat. The collet 2 includes a collet body 21 and a chuck 22.

[0040] The cylindrical body 21 is disposed within the connecting portion 11 and is movably connected to the connecting portion 11. An annular protrusion is provided within the connecting portion 11. The protrusion is an abutment ring, which limits the sliding distance of the cylindrical body 21 when it slides within the connecting portion 11.

[0041] The cylindrical body 21 has several slits near the opening of the placement part 13. These slits are perpendicular to the end face of the placement part 13 and evenly divide the portion of the cylindrical body 21 near the opening of the placement part 13 into several clamping pieces. These clamping pieces form a clamp 22. The clamp 22 is inclined near the outer wall of the placement part 13, and its inclination angle matches the inclined surface of the opening of the placement part 13. The inner wall away from the placement part 13 is stepped with gradually increasing thickness from the end near the opening of the mounting part 12 to the end away from the opening of the mounting part 12. The stepped shape is a limiting ring, and the limiting ring matches the width of the bearing seat. It is used to abut against the bearing seat to restrict the bearing seat and prevent the bearing seat from deforming.

[0042] In this embodiment, since the chuck 22 needs to generate a certain amount of elastic deformation during operation to clamp the workpiece, the chuck 22 is made of spring steel, which has excellent elasticity. For example, in machining, when the chuck 22 clamps a cylindrical workpiece, the elasticity of the spring steel allows the chuck 22 to contract and rebound appropriately, thereby tightly holding the workpiece.

[0043] In this embodiment, after the bearing housing is installed into the cylinder body 21, the bearing housing abuts against the limiting ring. When the operator presses the bearing housing, the collet 2 moves within the shaft head assembly 1. Under the action of the inclined surface in the mounting part 12, the collet 22 contracts radially during sliding, thus fully enclosing and clamping the circular bearing mounting cavity in the middle of the bearing housing. Due to the weight of the bearing housing itself, the collet 22 cannot completely return to its original shape, but remains in a state that can stably clamp the bearing housing. This prevents the collet 22 from easily loosening without external force, thus preventing the bearing housing from moving during rotation. In this embodiment, by setting the shaft head assembly 1 and fixing it to the lathe spindle, and using the collet 22 in the collet 2 to clamp the bearing housing, the bearing housing is fixed and processed. This solves the technical problem of the bearing housing easily detaching from the fixture during turning, achieving a more stable clamping effect during bearing housing turning.

[0044] In some preferred embodiments, the end face of the chuck 22 is 0.3-0.5mm lower than the end face of the mounting part 12, which can avoid direct contact and friction between the end face of the chuck 22 and other parts during assembly and use, thereby reducing the wear of the chuck 22.

[0045] In this embodiment, both the shaft head assembly 1 and the collet 2 are provided with a plurality of discharge ports. The discharge ports are square openings and are evenly distributed at the center of the shaft head assembly 1 and the collet 2. During the turning of the bearing seat, the waste material is discharged through the discharge ports to avoid the waste material affecting the processing efficiency.

[0046] In some preferred embodiments, since there are gaps between the clamping pieces, in actual use, due to the gaps between the clamping pieces, under the action of cutting force during processing, the clamping pieces may experience slight displacement, leading to an increase in the radial runout of the part. Therefore, the gaps between the clamping pieces are filled with adhesive to reduce the possibility of displacement of the clamping pieces. For example, the adhesive is an anaerobic adhesive, which has good sealing performance and a certain strength, can effectively fill gaps and prevent loosening, and the cured anaerobic adhesive has a certain toughness and can withstand a certain degree of vibration and impact, so that the clamping pieces will not easily generate relative displacement when subjected to external force, thereby clamping the workpiece more stably.

[0047] In this embodiment, four threaded holes 131 are also provided on the end face of the placement part 13. The four threaded holes 131 are evenly distributed on both sides of the two countersunk holes. Bolts 132 are also threaded into the threaded holes 131. After the bearing seat is clamped, the ear of the bearing seat is further limited to prevent the bearing seat from rotating during turning.

[0048] In this embodiment, since the bearing housing has an asymmetrical structure, in order to reduce the centrifugal force generated by the bearing housing when the shaft head assembly 1 rotates, a counterweight 14 is also provided on the shaft head assembly 1. The counterweight 14 is located on the side of the placement part 13 that is farther away from the bearing housing ear and is fixedly connected to the placement part 13. When the shaft head assembly 1 rotates, it will not operate eccentrically, thus extending its service life.

[0049] Please see Figure 4 As shown, since the bearing housing is machined using traditional turning, two turning tools are required for tool changing, resulting in low efficiency and inability to guarantee product size requirements. In the second aspect, this application also provides a bearing housing machining device, including a bearing housing turning machining fixture as described in the first aspect, and a bearing housing turning machining tool 3, wherein the bearing housing turning machining tool 3 includes a tool holder 31 and two inserts 32.

[0050] Specifically, the tool holder 31 has a cylindrical structure, with one end connected to the bearing housing machining device and the other end having a planar structure, which is a mounting plane. Two fixing grooves are formed at the edge of the mounting plane. Two cutting blades 32 are respectively disposed within the fixing grooves and fixedly installed in the grooves by bolts 132 and nuts. Both cutting blades 32 have a rhomboid structure, giving them multiple cutting edges to enhance cutting stability in practical applications. The distance between the tips of the two cutting blades 32 is matched to the distance the bearing housing needs to be machined, enabling precise dimensional machining of the bearing housing. For example, when machining the journal portion of the bearing housing, this matching ensures that the machining length exactly meets the design requirements.

[0051] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A bearing housing turning fixture, characterized in that, include: The shaft head assembly (1) is a hollow cylindrical structure with openings at both ends. The hollow part is the connecting part (11), and the openings at both ends are the mounting part (12) and the placement part (13), respectively. Collet (2), the collet (2) is disposed in the hollow part of the shaft head assembly (1) and is movably connected to the shaft head assembly (1). The collet (2) is used to clamp and fix the bearing seat (4). The collet (2) includes: The cylindrical body (21) is disposed in the connecting part (11) and is movably connected to the connecting part (11). An annular protrusion is provided in the connecting part (11), and the protrusion is an abutment ring. The chuck (22) has several slits at the opening of the cylinder body (21) near the placement part (13), and the several slits evenly divide the cylinder body (21) into several clamping pieces, and the several clamping pieces form the chuck (22).

2. The bearing housing turning fixture according to claim 1, characterized in that, The inner wall of the opening of the placement part (13) is also provided with an flared inclined surface. The clamp (22) is inclined near the outer wall of the placement part (13), and its inclination angle is adapted to the inclined surface at the opening of the placement part (13).

3. The bearing housing turning fixture according to claim 1, characterized in that, Adhesive is filled between several of the clips.

4. A bearing housing turning fixture according to claim 1, characterized in that, The shaft head assembly (1) is also provided with a counterweight (14), which is located on the placement part (13) and is fixedly connected to the placement part (13).

5. A bearing housing turning fixture according to claim 1, characterized in that, The chuck (22) is made of spring steel.

6. A bearing housing turning fixture according to claim 1, characterized in that, The end face of the placement part (13) is also provided with four threaded holes (131), and bolts (132) are threaded into the threaded holes (131) for auxiliary positioning of the bearing seat (4).

7. A bearing housing processing device, characterized in that, The bearing housing turning fixture according to any one of claims 1-6 further includes a cutting tool (3), said cutting tool (3) comprising: The tool holder (31) is cylindrical in shape. One end of the tool holder (31) is connected to the bearing seat (4) processing device, and the other end is mounted on a plane. Two fixing grooves are opened at the edge of the mounting plane. Two blades (32) are respectively disposed in two fixed grooves, and the two blades (32) are in a rhomboid structure.

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