Numerical control machining positioning tool for differential case

Abstract

The utility model discloses a differential mechanism shell numerical control processing positioning frock relates to positioning frock technical field, including base, the surface welding of base has the stand, the top welding of stand has the processing platform for the differential mechanism shell of placing. This differential mechanism shell numerical control processing positioning frock can place differential mechanism shell flange plate to the inside of circular recess, so that differential mechanism shell can be positioned and placed on the processing platform, at this moment can make the telescopic end of cylinder from its inside stretch out, so that the telescopic end of cylinder can drive disc to move to the direction close to the processing platform, when disc moves, can slide through the stand, when disc moves, can drive four groups of connecting blocks to go up, and one group of cylinder can drive four groups of positioning blocks to extrude and position differential mechanism shell flange plate simultaneously, and one group of cylinder has no time sequence error, thereby improving the positioning precision of differential mechanism shell, and improving the processing precision and quality stability of differential mechanism shell.

Description

Technical Field

[0001] This utility model relates to the field of positioning tooling technology, specifically to a CNC machining positioning tooling for a differential housing. Background Technology

[0002] The differential is a core component of the automotive transmission system, mainly used to adjust the speed difference between the left and right drive wheels, ensuring smooth vehicle steering and adapting to complex road conditions. The differential housing is the outer shell that houses and protects the internal gear set of the differential, while also enabling power transmission and speed regulation. The differential housing needs to be machined using CNC machine tools during the production process. During the machining of the differential housing, positioning fixtures are required to fix the differential housing, thereby facilitating the CNC machine tool to drill holes in its top.

[0003] In the existing technology, the CNC machining positioning fixture for differential housing usually uses multiple sets of cylinders to press and position the flange on the differential housing. Since multiple sets of cylinders need to be equipped with synchronization valves for control, and there are timing errors when multiple sets of cylinders run simultaneously, the positioning of the flange on the differential housing by multiple sets of cylinders is not synchronized and accurate enough, thus affecting the drilling accuracy of the differential housing. Utility Model Content

[0004] The purpose of this utility model is to provide a CNC machining positioning fixture for differential housing, so as to solve the problem that the positioning fixture mentioned in the background art is not accurate enough in positioning the differential housing.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a CNC machining positioning fixture for a differential housing, comprising a base, a column welded to the surface of the base, a machining table for placing the differential housing welded to the top of the column, a cylinder mounted at the center of the surface of the base, a disc connected to the telescopic end of the cylinder, a sliding structure between the disc and the column, four sets of connecting blocks welded to the top of the disc, a limit groove vertically formed on the outer side of the machining table near the connecting blocks, a limit block slidably disposed in the limit groove and fixedly connected to the connecting blocks, a fixing block welded to the machining table, first connecting shafts connected to both sides of the fixing block, connecting plates movably connected to the outer sides of the two sets of first connecting shafts, and second connecting shafts penetratingly connected to the inner side of the two sets of connecting plates away from the first connecting shafts, a movable block rotatably sleeved on the second connecting shaft, a positioning block connected to the movable block for pressing and positioning the differential housing flange, a connecting rod connected to the inner side of the movable block near the connecting block, and the end of the connecting block movably connected to the connecting rod.

[0006] Preferably, the top surface of the processing table is provided with a circular groove for positioning and placing the differential housing flange. The depth of the circular groove is less than the thickness of the differential housing flange, and the diameter of the circular groove matches the diameter of the differential housing flange.

[0007] Preferably, the machining table has a through hole inside for guiding the waste material generated during drilling of the differential housing.

[0008] Preferably, the bottom of the processing table is connected to two sets of connecting seats, the interior of which is provided with a placement groove, and a collection box for collecting differential housing drilling waste is provided between the two sets of connecting seats. The two sides of the collection box are provided with docking blocks that cooperate with the placement groove.

[0009] Preferably, the connecting seat has an internal threaded connection with a threaded knob for threaded fixing to the mating block.

[0010] Preferably, the mating block has a threaded hole inside that matches the size of the threaded knob.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. A set of cylinders can drive four sets of positioning blocks to simultaneously press and position the differential housing flange, and a set of cylinders has no timing error, thereby improving the positioning accuracy of the differential housing and enhancing the machining accuracy and quality stability of the differential housing.

[0013] 2. The collection box can collect the waste generated from drilling the differential housing, thereby improving the cleanliness of the CNC machine tool and positioning fixture surfaces. The collection box is also easy and convenient to disassemble. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is a three-dimensional structural diagram of the cylinder of this utility model;

[0016] Figure 3 This is a three-dimensional cross-sectional view of the movable block of this utility model;

[0017] Figure 4 This is a three-dimensional structural diagram of the processing table of this utility model;

[0018] Figure 5 This is a three-dimensional cross-sectional structural diagram of the connector of this utility model.

[0019] In the diagram: 1. Base; 2. Column; 3. Processing table; 4. Circular groove; 5. Through hole; 6. Cylinder; 7. Disc; 8. Connecting block; 9. Limiting groove; 10. Limiting block; 11. Fixing block; 12. First connecting shaft; 13. Connecting plate; 14. Second connecting shaft; 15. Movable block; 16. Positioning block; 17. Connecting seat; 18. Placement groove; 19. Threaded knob; 20. Collection box; 21. Connecting block. Detailed Implementation

[0020] 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.

[0021] Please see Figures 1-4 It can be seen that this utility model provides a technical solution: a CNC machining positioning fixture for a differential housing, including a base 1, a column 2 welded to the surface of the base 1, a machining table 3 for placing the differential housing welded to the top of the column 2, a cylinder 6 installed at the center of the surface of the base 1, a disc 7 connected to the telescopic end of the cylinder 6, the disc 7 and the column 2 forming a sliding structure, four sets of connecting blocks 8 welded to the top of the disc 7, and a limit groove 9 vertically formed on the outer side of the machining table 3 near the connecting blocks 8, with a limiter slidably arranged in the limit groove 9 and fixedly connected to the connecting blocks 8. Position block 10, a fixed block 11 is welded on the processing table 3, and a first connecting shaft 12 is connected to both sides of the fixed block 11. A connecting plate 13 is movably connected to the outer side of the two sets of first connecting shafts 12. A second connecting shaft 14 is connected through the inner side of the two sets of connecting plates 13 away from the first connecting shafts 12. A movable block 15 is rotatably sleeved on the second connecting shaft 14. A positioning block 16 for pressing and positioning the differential housing flange is connected to the movable block 15. A connecting rod is connected to the inner side of the movable block 15 near the connecting block 8. The end of the connecting block 8 is movably connected to the connecting rod.

[0022] exist Figures 1-3 In the middle: The top surface of the processing table 3 is provided with a circular groove 4 for positioning and placing the differential housing flange. The depth of the circular groove 4 is less than the thickness of the differential housing flange, and the diameter of the circular groove 4 matches the diameter of the differential housing flange.

[0023] exist Figures 1-3 In the middle: The interior of the machining table 3 has a through hole 5 for guiding the waste material generated when drilling the differential housing.

[0024] In practice, traditional positioning fixtures are not precise enough when positioning the flange on the differential housing, thus affecting the drilling accuracy of the differential housing. To address this, the differential housing flange can be placed inside the circular groove 4, allowing the differential housing to be positioned on the machining table 3. At this point, the telescopic end of the cylinder 6 can extend from inside, causing the circular disc 7 to move closer to the machining table 3. As the disc 7 moves, it slides along the column 2. Simultaneously, the movement of the disc 7 causes the four sets of connecting blocks 8 to rise. When the connecting blocks 8 rise, they cause the limiting block 10 to slide within the limiting groove 9. At the same time, the connecting blocks 8 can also cause the connecting rod inside the movable block 15 to move forward. The upward movement of the connecting rod allows the movable block 15 to move. When the movable block 15 moves, it can rotate via the second connecting shaft 14. Simultaneously, the movable block 15 can drive the second connecting shaft 14 to push the connecting plate 13. When the connecting plate 13 moves, it can rotate via the first connecting shaft 12, allowing the movable block 15 to drive the positioning block 16 to rotate and move closer to the surface of the differential housing flange. When the bottoms of all four sets of positioning blocks 16 have moved to the surface of the differential housing flange, the four sets of positioning blocks 16 can simultaneously press and position the differential housing flange, thereby further improving the stability of the differential housing. At this time, the CNC machine tool can perform drilling operations on the top of the differential housing.

[0025] See Figures 1-4 It can be seen that a set of cylinders 6 can drive four sets of positioning blocks 16 to simultaneously press and position the differential housing flange, and a set of cylinders 6 has no timing error, thereby improving the positioning accuracy of the differential housing and enhancing the machining accuracy and quality stability of the differential housing.

[0026] exist Figure 2 , Figure 4 and Figure 5 In the middle: The bottom of the processing table 3 is connected to two sets of connecting seats 17. The interior of the connecting seat 17 is provided with a placement groove 18. Between the two sets of connecting seats 17, there is a collection box 20 for collecting differential housing drilling waste. On both sides of the collection box 20, there are mating blocks 21 that cooperate with the placement groove 18. The interior of the connecting seat 17 is threaded with a threaded knob 19 for threaded fixing with the mating block 21.

[0027] exist Figure 2 , Figure 4 and Figure 5 In the middle: the connecting block 21 has a threaded hole inside that matches the size of the threaded knob 19, and the diameter of the collection box 20 is smaller than the straight-line distance between two adjacent sets of columns 2.

[0028] In practice, during the drilling process of the differential housing, drilling waste is generated. The drilling waste falls into the collection box 20 through the through hole 5, thus preventing the waste from falling onto the CNC machine tool and positioning fixture. This eliminates the need for workers to clean the waste from the CNC machine tool and positioning fixture. After the collection box 20 has been used for a certain period of time, the two sets of threaded knobs 19 can be loosened so that the ends of the threaded knobs 19 can slide out from the threaded holes inside the mating blocks 21. At this time, the collection box 20 can be pulled. When the collection box 20 moves, it can drive the two sets of mating blocks 21 to move out from the inside of the connecting seat 17 along the placement groove 18. At this time, the collection box 20 can be disassembled, so that the waste inside the collection box 20 can be emptied.

[0029] See Figure 2 , Figure 4 and Figure 5 It can be seen that the waste generated from drilling the differential housing can be collected through the collection box 20, thereby improving the cleanliness of the CNC machine tool and positioning fixture surface, and the collection box 20 is simple and convenient to disassemble.

Claims

1. A CNC machining positioning fixture for a differential housing, comprising a base (1), characterized in that: The base (1) has a column (2) welded to its surface, and a machining table (3) for placing the differential housing is welded to the top of the column (2). A cylinder (6) is installed at the center of the surface of the base (1). A disc (7) is connected to the telescopic end of the cylinder (6). The disc (7) and the column (2) form a sliding structure. Four sets of connecting blocks (8) are welded to the top of the disc (7). A limit groove (9) is vertically opened on the outer side of the processing table (3) near the connecting blocks (8). A limit block (10) fixedly connected to the connecting block (8) is slidably arranged in the limit groove (9). A fixing block (11) is welded on the processing table (3). Both sides of the fixing block (11) are connected to... The first connecting shaft (12) has connecting plates (13) movably connected to the outer sides of both sets of the first connecting shafts (12). The two sets of connecting plates (13) are connected through the inner sides of the first connecting shafts (12) to the second connecting shafts (14). A movable block (15) is rotatably sleeved on the second connecting shaft (14). The movable block (15) is connected to a positioning block (16) for pressing and positioning the differential housing flange. A connecting rod is connected to the inner side of the movable block (15) near the connecting block (8). The end of the connecting block (8) is movably connected to the connecting rod.

2. The differential housing CNC machining positioning fixture according to claim 1, characterized in that: The top surface of the processing table (3) is provided with a circular groove (4) for positioning and placing the differential housing flange. The depth of the circular groove (4) is less than the thickness of the differential housing flange, and the diameter of the circular groove (4) matches the diameter of the differential housing flange.

3. The differential housing CNC machining positioning fixture according to claim 1, characterized in that: The machining table (3) has a through hole (5) inside for guiding the waste material generated when drilling the differential housing.

4. The differential housing CNC machining positioning fixture according to claim 3, characterized in that: The bottom of the processing table (3) is connected to two sets of connecting seats (17). The connecting seats (17) have a placement groove (18) inside. A collection box (20) for collecting differential housing drilling waste is provided between the two sets of connecting seats (17). The two sides of the collection box (20) are provided with docking blocks (21) that cooperate with the placement groove (18).

5. The differential housing CNC machining positioning fixture according to claim 4, characterized in that: The connecting seat (17) has an internal threaded connection with a threaded knob (19) for threaded fixing to the mating block (21).

6. The differential housing CNC machining positioning fixture according to claim 5, characterized in that: The mating block (21) has a threaded hole inside that matches the size of the threaded knob (19).

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