A clamping tool for machining a bearing seat

Abstract

The utility model relates to a kind of clamping fixture of bearing seat processing, including bottom plate and clamping unit, clamping unit includes first L-shaped positioning block, second L-shaped positioning block, compression gasket and clamping mechanism;First L-shaped positioning block and second L-shaped positioning block are oppositely installed, and are enclosed into the limiting space matched with bearing seat, compression gasket is located in the side of limiting space away from bottom plate, and is adjustably fixed on bottom plate by tightening screw;Clamping mechanism includes contact plate, moving block, driving block, guide block and adjusting screw;Guide block is fixed on bottom plate, driving block is wedge structure, and can be slidably installed between moving block and guide block, driving block is adjustably structured fixed on bottom plate by adjusting screw, contact plate is located in the side of limiting space opposite first L-shaped positioning block, and contact plate is fixed on moving block.Compared with prior art, the utility model has the advantages of simple adjusting structure, convenient operation and high workpiece positioning and clamping efficiency.

Description

Technical Field

[0001] This utility model relates to the field of fixture structures, and in particular to a fixture for machining bearing seats. Background Technology

[0002] A clamping device is a piece of tooling used to fix a workpiece, guide a cutting tool, and ensure machining accuracy. It typically consists of positioning elements, clamping elements, and connecting elements. Commonly used clamping devices include three-jaw and four-jaw chucks for machine tools, and vises and rotary tables on milling machines. General-purpose clamps are standardized and can be used to machine different workpieces within a certain range, but they also have some drawbacks:

[0003] Because general-purpose fixtures require additional time to adjust and set up to accommodate different workpieces, this can lead to reduced productivity. General-purpose fixtures may not provide the precise positioning and clamping required for a specific workpiece, resulting in insufficient machining accuracy. General-purpose fixtures may also fail to meet the specific requirements of a particular machining task, such as specific clamping forces, positioning accuracy, or space constraints.

[0004] For example, the invention disclosed in CN118123062A discloses a bearing housing fixture, including a base plate, a fixing structure on the base plate, an adjusting structure on the fixing structure, a release structure connecting the adjusting structure and the fixing structure, a clamping structure on the base plate, a stabilizing structure connected to the fixing structure, and a positioning structure connecting the clamping structure and the base plate. The fixing structure can simultaneously satisfy the fixing method for milling and boring of the bearing housing, the clamping structure can limit the bearing housing during boring, and the stabilizing structure can initially position the bearing housing placed on the support plate, facilitating fixing.

[0005] However, the aforementioned fixture, which adjusts the position of the contact block based on a lead screw thread structure, requires the addition of an extra locking structure to ensure the stability and reliability of workpiece clamping. This results in a relatively complex overall structure and poor scalability. Furthermore, the positioning and clamping process of the bearing housing is relatively cumbersome, with multiple position adjustments affecting the overall positioning accuracy and resulting in low positioning and clamping efficiency. Utility Model Content

[0006] The purpose of this utility model is to overcome the shortcomings of the existing technology, such as the relatively complex clamping structure and low positioning and clamping efficiency in bearing housing processing, and to provide a fixture for bearing housing processing.

[0007] The objective of this utility model can be achieved through the following technical solutions:

[0008] A fixture for machining bearing housings includes a base plate and a clamping unit. The clamping unit includes a first L-shaped positioning block, a second L-shaped positioning block, a clamping pad, and a clamping mechanism. The first L-shaped positioning block and the second L-shaped positioning block are installed opposite to each other and form a limiting space that cooperates with the bearing housing. The clamping pad is located on the side of the limiting space away from the base plate and can be adjusted and fixed on the base plate by tightening screws.

[0009] The clamping mechanism includes a contact plate, a moving block, a driving block, a guide block, and an adjusting screw; the guide block is fixed on the base plate, the driving block has a wedge-shaped structure and can be slidably installed between the moving block and the guide block, the driving block is fixed to the base plate by adjusting the structure through the adjusting screw, the contact plate is located on the side of the limiting space facing the first L-shaped positioning block, and the contact plate is fixed on the moving block.

[0010] Preferably, the inner side of the first L-shaped positioning block includes a clamping edge and a first limiting edge that are perpendicular to each other, and the second L-shaped positioning block includes a second limiting edge and a third limiting edge that are perpendicular to each other. The first limiting edge and the second limiting edge are coplanar, and the clamping edge is parallel to the front end face of the contact plate.

[0011] Preferably, the bearing housing is provided with an arc-shaped groove, and the base plate is provided with a machining groove that matches the arc-shaped groove. The first limiting edge and the second limiting edge are symmetrically distributed on both sides of the machining groove.

[0012] Preferably, the guide block has a T-shaped guide groove perpendicular to the base plate on the side near the drive block, and the drive block has a T-shaped guide block that cooperates with the T-shaped guide groove. The T-shaped guide block can be slidably installed in the T-shaped guide groove.

[0013] Preferably, the mating surfaces of the moving block and the driving block are inclined sliding surfaces, and the angle between the inclined sliding surface and the base plate is in the range of 55-65 degrees.

[0014] Preferably, the driving block has an inclined guide platform on the side near the moving block, and the moving block has a guide groove that cooperates with the inclined guide platform. The inclined guide platform is slidably installed in the guide groove, and the end face of the inclined guide platform is parallel to the inclined sliding surface.

[0015] Preferably, the drive block has a countersunk hole on the side away from the base plate, and an elongated hole is formed at the bottom of the countersunk hole. The elongated direction of the elongated hole is parallel to the moving direction of the contact block, and the adjusting screw can move through the elongated hole.

[0016] Preferably, there are multiple clamping pads, and each clamping pad is symmetrically distributed on both sides of the limiting space.

[0017] Preferably, the tooling further includes a four-axis connecting plate and a column. The four-axis connecting plate is symmetrically installed at both ends of the base plate, and two parallel base plates are provided between the four-axis connecting plates. The column is installed between the two base plates.

[0018] Preferably, there are multiple clamping units, and each clamping unit is evenly distributed on the base plate.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] (1) This solution uses the limiting space enclosed by two L-shaped positioning blocks to perform initial horizontal positioning of the bearing seat, and uses clamping pads for longitudinal positioning and clamping. By rotating the adjusting screw, the direction of the wedge structure is changed, thereby driving the contact plate. Compared with the screw and nut structure, this clamping mechanism is more convenient and labor-saving to operate, simplifies the work of installing workpieces and changing work positions, and eliminates the need for drawing lines and alignment, thus shortening the auxiliary time of the process. Moreover, the structure is simple and low in cost, and it is easy to expand the structure of fixtures and tooling.

[0021] (2) This solution installs the base plate between the four connecting plates and uses two opposing base plates. Multiple clamping units are set on each base plate, so that multiple workpieces can be clamped at one time, which greatly improves the working efficiency of the bearing seat.

[0022] (3) The limiting space in this scheme can be designed according to the processing requirements to quickly and accurately position the parts. The auxiliary clamping operation can ensure the processing accuracy of the workpiece. Due to the structural characteristics of its clamping unit, the workpiece can be accurately positioned to ensure the positional stability of the workpiece during the processing. Attached Figure Description

[0023] Figure 1 A schematic diagram of the tooling structure with bearing housing clamping provided by this utility model;

[0024] Figure 2 A schematic diagram of the bearing housing clamping fixture provided by this utility model;

[0025] Figure 3 A schematic diagram of the clamping unit provided by this utility model;

[0026] Figure 4 A schematic diagram of the structure of the clamping unit with a bearing seat installed according to this utility model;

[0027] In the diagram: 1. Base plate, 2. First L-shaped positioning block, 3. Second L-shaped positioning block, 4. Pressure pad, 5. Bearing base, 6. Contact plate, 7. Moving block, 8. Drive block, 9. Guide block, 10. Adjusting screw, 11. Four-axis connecting plate, 12. Column, 101. Machining groove, 21. Clamping edge, 22. First limiting edge, 31. Second limiting edge, 32. Third limiting edge, 81. T-shaped guide block, 91. T-shaped guide groove. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0029] 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 to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0030] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0031] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0033] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0034] Example 1

[0035] like Figure 1 and Figure 2 As shown, this embodiment provides a fixture for machining a bearing housing, including a base plate 1 and a clamping unit. The clamping unit includes a first L-shaped positioning block 2, a second L-shaped positioning block 3, a clamping pad 4, and a clamping mechanism. The first L-shaped positioning block 2 and the second L-shaped positioning block 3 are installed opposite to each other and form a limiting space that cooperates with the bearing housing 5. The clamping pad 4 is located on the side of the limiting space away from the base plate 1 and can be adjusted and fixed on the base plate 1 by tightening screws.

[0036] The clamping mechanism includes a contact plate 6, a moving block 7, a driving block 8, a guide block 9, and an adjusting screw 10. The guide block 9 is fixed on the base plate 1. The driving block 8 has a wedge-shaped structure and can be slidably installed between the moving block 7 and the guide block 9. The driving block 8 is fixed on the base plate 1 by adjusting the structure through the adjusting screw 10. The contact plate 6 is located on the side of the limiting space directly opposite the first L-shaped positioning block 2, and the contact plate 6 is fixed on the moving block 7.

[0037] Place the bearing housing 5 to be processed into the limiting space, so that the left end of the bearing housing 5 abuts against the inner side of the first L-shaped positioning block 2 and the front end abuts against the second L-shaped positioning block 3, completing the initial positioning. Rotate the tightening screw to press the clamping shim 4 against the corresponding upper surface of the bearing housing 5, and then rotate the adjusting screw 10 to move the driving block 8 closer to the base plate 1, and press the moving block 7 to drive the contact plate 6 closer to the bearing housing 5 until contact is made, completing the positioning and clamping of the bearing housing.

[0038] The bearing seat is initially horizontally positioned by the limiting space enclosed by two L-shaped positioning blocks, and then longitudinally positioned and clamped by the clamping shims. Rotating the adjusting screw, based on the wedge structure, drives the contact plate 6 through directional change. Compared to a lead screw and nut structure, this clamping mechanism is easier and less labor-intensive to operate, simplifying workpiece installation and station switching. It eliminates the need for drawing lines and alignment, thus shortening auxiliary time in the process. Furthermore, its simple structure and low cost facilitate structural expansion of fixtures and tooling.

[0039] In this embodiment, as Figure 3 As shown, the inner side of the first L-shaped positioning block 2 includes a clamping edge 21 and a first limiting edge 22 that are perpendicular to each other. The second L-shaped positioning block 3 includes a second limiting edge 31 and a third limiting edge 32 that are perpendicular to each other. The first limiting edge 22 and the second limiting edge 31 are coplanar. The clamping edge 21 is parallel to the front end face of the contact plate 6.

[0040] In this embodiment, the bearing housing is provided with an arc-shaped groove, and the base plate 1 is provided with a machining groove 101 that matches the arc-shaped groove. The first limiting edge 22 and the second limiting edge 31 are symmetrically distributed on both sides of the machining groove 101. By providing the machining groove 101 at the corresponding position on the base plate 1, it is convenient to process the bearing housing 5.

[0041] In this embodiment, as Figure 3 and Figure 4 As shown, the guide block 9 has a T-shaped guide groove 91 perpendicular to the base plate 1 on the side near the drive block 8. The drive block 8 has a T-shaped guide block 81 that cooperates with the T-shaped guide groove 91. The T-shaped guide block 81 can be slidably installed in the T-shaped guide groove 91.

[0042] Furthermore, the mating surfaces of the movable block 7 and the drive block 8 are inclined sliding surfaces, and the angle between the inclined sliding surface and the base plate 1 is within the range of 60 degrees. The drive block 8 is provided with an inclined guide platform on the side near the movable block 7, and the movable block 7 is provided with a guide groove that mates with the inclined guide platform. The inclined guide platform can be slidably installed in the guide groove, and the end face of the inclined guide platform is parallel to the inclined sliding surface.

[0043] Furthermore, the drive block 8 has a countersunk hole on the side away from the base plate 1, and an elongated hole is opened at the bottom of the countersunk hole. The elongated direction of the elongated hole is parallel to the moving direction of the contact block 6, and the adjusting screw 10 can move through the elongated hole.

[0044] When the adjusting screw 10 is tightened downwards, the drive block moves downwards accordingly. The drive block is a wedge-shaped structure with a smaller bottom and a larger top. The up-and-down movement of the drive block can adjust the distance between the moving block and the guide block. The guide block is fixed on the base plate, which can drive the moving block to move the contact block, so that the contact block can cooperate with the clamping edge of the first L-shaped positioning block to clamp the bearing seat.

[0045] In this embodiment, there are two clamping pads 4, which are symmetrically distributed on both sides of the limiting space. The clamping pads 4 on both sides ensure that the bearing seat is subjected to symmetrical forces in the direction perpendicular to the base plate, thus ensuring reliable clamping.

[0046] In this embodiment, the tooling also includes a four-axis connecting plate 11 and a column 12. The four-axis connecting plate 11 is symmetrically installed at both ends of the base plate 1, and two parallel base plates 1 are provided between the four-axis connecting plates 11. The column 12 is installed between the two base plates 1. There are three clamping units, which are evenly distributed on the base plate 1.

[0047] The base plate is installed between the four connecting plates, and two base plates are set opposite each other. Multiple clamping units are set on each base plate, so that multiple workpieces can be clamped at one time, which greatly improves the operating efficiency of the bearing housing.

[0048] Specifically, the fixture in this embodiment can be used for clamping workpieces during milling and drilling processes. Threaded holes and pin holes on the base plate are used to connect the four-axis connecting plate, clamping mechanism, and positioning elements. Threaded holes on the side and top of the column support the two base plates and the four-axis connecting plate. Hex socket head cap screws and washers are used to position and clamp the workpiece, restricting the two degrees of freedom of the bearing seat's Z-axis. Large and small L-shaped limit blocks and contact blocks restrict the four degrees of freedom of the X and Y axes. The clamping mechanism adopts an OK clamp structure, consisting of a moving block, a driving block, a guide block, and an adjusting screw. Rotating the adjusting screw on the OK clamp adjusts the opening and closing degree of the OK clamp, driving the contact block that contacts the workpiece to clamp or release it. Tightening the tightening bolts on both sides of the washers completes the workpiece positioning.

[0049] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A fixture for machining bearing housings, characterized in that, The device includes a base plate (1) and a clamping unit. The clamping unit includes a first L-shaped positioning block (2), a second L-shaped positioning block (3), a pressing pad (4), and a clamping mechanism. The first L-shaped positioning block (2) and the second L-shaped positioning block (3) are installed opposite to each other and form a limiting space that cooperates with the bearing seat (5). The pressing pad (4) is located on the side of the limiting space away from the base plate (1) and can be adjusted and fixed on the base plate (1) by tightening screws. The clamping mechanism includes a contact plate (6), a moving block (7), a driving block (8), a guide block (9), and an adjusting screw (10). The guide block (9) is fixed on the base plate (1). The driving block (8) is a wedge-shaped structure and can be slidably installed between the moving block (7) and the guide block (9). The driving block (8) is fixed on the base plate (1) by adjusting the structure through the adjusting screw (10). The contact plate (6) is located on the side of the limiting space facing the first L-shaped positioning block (2). The contact plate (6) is fixed on the moving block (7).

2. The fixture for machining a bearing housing according to claim 1, characterized in that, The inner side of the first L-shaped positioning block (2) includes a clamping edge (21) and a first limiting edge (22) that are perpendicular to each other. The second L-shaped positioning block (3) includes a second limiting edge (31) and a third limiting edge (32) that are perpendicular to each other. The first limiting edge (22) and the second limiting edge (31) are coplanar. The clamping edge (21) is parallel to the front end face of the contact plate (6).

3. The fixture for machining a bearing housing according to claim 2, characterized in that, The bearing seat (5) is provided with an arc-shaped groove, and the base plate (1) is provided with a machining groove (101) that matches the arc-shaped groove. The first limiting edge (22) and the second limiting edge (31) are symmetrically distributed on both sides of the machining groove (101).

4. The fixture for machining a bearing housing according to claim 1, characterized in that, The guide block (9) has a T-shaped guide groove (91) perpendicular to the base plate (1) on the side near the drive block (8). The drive block (8) has a T-shaped guide block (81) that cooperates with the T-shaped guide groove (91). The T-shaped guide block (81) can be slidably installed in the T-shaped guide groove (91).

5. The fixture for machining a bearing housing according to claim 1, characterized in that, The mating surfaces of the moving block (7) and the driving block (8) are inclined sliding surfaces, and the angle between the inclined sliding surface and the base plate (1) is in the range of 55-65 degrees.

6. The fixture for machining a bearing housing according to claim 5, characterized in that, The drive block (8) is provided with an inclined guide platform on the side near the moving block (7). The moving block (7) is provided with a guide groove that cooperates with the inclined guide platform. The inclined guide platform is slidably installed in the guide groove. The end face of the inclined guide platform is parallel to the inclined sliding surface.

7. The fixture for machining a bearing housing according to claim 1, characterized in that, The drive block (8) has a countersunk hole on the side away from the base plate (1). An elongated hole is provided at the bottom of the countersunk hole. The elongated direction of the elongated hole is parallel to the moving direction of the contact block (6). The adjusting screw (10) can move through the elongated hole.

8. The fixture for machining a bearing housing according to claim 1, characterized in that, The number of compression pads (4) is multiple, and each compression pad (4) is symmetrically distributed on both sides of the limiting space.

9. The fixture for machining a bearing housing according to claim 1, characterized in that, The tooling also includes a four-axis connecting plate (11) and a column (12). The four-axis connecting plate (11) is symmetrically installed at both ends of the base plate (1). Two parallel base plates (1) are provided between the four-axis connecting plates (11). The column (12) is installed between the two base plates (1).

10. The fixture for machining a bearing housing according to claim 1, characterized in that, The number of clamping units is multiple, and each clamping unit is evenly distributed on the base plate (1).

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