Countersinking device for flange hole of main speed reducer shell of drive axle

Abstract

The utility model provides a counter boring device for a flange hole of a main speed reducer shell of a drive axle. The counter boring device is characterized by comprising a positioning support, a chip guide table and a quick-change positioning disc, the positioning support is cylindrical, the lower part of the positioning support is in bolted connection with the vertical drill workbench, and the upper part of the positioning support is provided with a third spigot; the quick-change positioning disc is annular, a second spigot is formed in the lower part of the quick-change positioning disc, and the second spigot is in transition fit with the third spigot; the quick-change positioning disc is connected with the positioning support through a bolt; a first seam allowance is formed in the inner side of the quick-change positioning disc and is in clearance fit with the outer circle of a flange seam allowance of the main speed reducer shell; the chip guide table is in a tray shape and is obliquely arranged on the outer side of the positioning support, and a chip removal opening is further formed in the chip guide table. The device is easy to operate, suitable for counter boring of flange holes of various main speed reducer shells, high in efficiency and low in cost, and scrap iron is easy to collect and clean.

Description

Technical Field

[0001] The utility model relates to a device for countersinking flange holes of a driving axle main reducer housing, belonging to the technical field of automobile parts processing and manufacturing. Background Technique

[0002] As one of the five major assembly parts of an automobile, the rear driving axle plays the roles of bearing the vehicle body and power transmission. Among them, the key power transmission function is realized by the main reducer assembly, which is a core component. Since the driving axle products are for numerous vehicle models of different domestic vehicle enterprises, there are a very large number of driving axle product types and the corresponding main reducer housing varieties. Moreover, in production, rapid switching production of multi-variety products needs to be achieved. If special tooling is developed for each product, problems such as relatively high investment costs, a large tooling storage area required beside the production line, and a long tooling change time during product switching may occur. In addition, during the machining process of a vertical drilling machine, a large amount of iron chips will fly, resulting in a dirty and messy production environment and being not easy to clean up.

[0003] Therefore, a processing tooling with simple design, low cost, good applicability and easy iron chip cleaning is needed to adapt to the processing operations of multi-variety rapid switching. Content of the Utility Model

[0004] The purpose of the utility model is to provide a device for countersinking flange holes of a driving axle main reducer housing to solve the problems in the prior art.

[0005] This device is used in cooperation with a standard vertical drilling machine. It has strong versatility, low requirements for the model specifications of the equipment, can adapt to different product processing by replacing the positioning disc, reduces the device debugging time, improves the utilization rate and processing efficiency, and at the same time improves the cleanliness around the processing area.

[0006] The technical solution adopted by the utility model is: a device for countersinking flange holes of a driving axle main reducer housing, characterized in that: it includes a positioning support, a chip guiding table, and a quick-change positioning disc; the positioning support is cylindrical, the lower part is bolted to the vertical drilling machine workbench, and the upper part is provided with a third rabbet; the quick-change positioning disc is annular, the lower part is provided with a second rabbet, and the second rabbet is in transitional fit with the third rabbet; and the quick-change positioning disc and the positioning support are bolted; a first rabbet is arranged inside the quick-change positioning disc, and the first rabbet is in clearance fit with the outer circle of the flange rabbet of the main reducer housing; the chip guiding table is in the shape of a tray, is obliquely arranged outside the positioning support, and a chip discharging port is also arranged on the chip guiding table.

[0007] Furthermore: a window for cleaning iron chips is arranged on the positioning support.

[0008] Furthermore: the chip guiding table is spliced and welded by steel plates with a thickness of 2 mm, and there is an inclination angle of 15° between the chip guiding table surface and the vertical drilling machine table surface.

[0009] Further: A wear-resistant ring is arranged inside the first rabbet.

[0010] The beneficial effects of the present utility model are as follows: The quick-change machining countersinking device for the flange holes of the driving axle main reducer housing of the present utility model places the flange rabbet of the main reducer housing in the first rabbet of the quick-change positioning disk, enabling it to achieve rotational movement without generating planar displacement. Then, the quick-change positioning disk is fixed to the positioning support by four bolts, realizing the quick replacement of the positioning disk. The present utility model is simple to operate, suitable for countersinking machining of flange holes of various types of main reducer housings, with high efficiency, low cost, and easy collection and cleaning of iron chips. Description of the Drawings

[0011] Figure 1 is the overall structural schematic diagram of the present utility model;

[0012] Figure 2 is the structural schematic diagram of the positioning support and the chip guide table of the present utility model;

[0013] Figure 3 is the structural schematic diagram of the quick-change positioning disk of the present utility model;

[0014] Figure 4 is the structural schematic diagram of the cooperation between the structure of the present utility model and the main reducer housing;

[0015] Figure 5 is the sectional structural schematic diagram of the quick-change positioning disk.

[0016] Explanation of the numbers in the figures: 1 is the positioning support, 2 is the chip guide table, 3 is the quick-change positioning disk, 4 is the iron chip cleaning window, 5 is the third rabbet, 6 is the wear-resistant ring, 7 is the first rabbet, 8 is the second rabbet, and 9 is the main reducer housing. Detailed Implementation Manner

[0017] As Figures 1-5 shown is a countersinking device for the flange holes of a driving axle main reducer housing of the structure of the present utility model, which includes a positioning support 1, a chip guide table 2, and a quick-change positioning disk 3;

[0018] The positioning support 1 is cylindrical, and a threaded hole is arranged inside the lower barrel wall and is fixedly connected to the vertical drill workbench through bolts. A third rabbet 5 is arranged inside the upper part;

[0019] The quick-change positioning disk 3 is annular (more precisely, a flange shape), with a stepped lower part. A second rabbet 8 is arranged on the side wall of the step, and the second rabbet 8 is in transitional fit with the third rabbet 5; and bolt holes are arranged on the quick-change positioning disk 3 and are fixedly connected to the positioning support 1 through bolts; a first rabbet 7 is arranged inside the quick-change positioning disk 3, and the outer circle of the first rabbet 7 has a clearance fit with the flange rabbet of the main reducer housing 9 to achieve precise positioning of the flange;

[0020] The chip guide table 2 is in the shape of a tray and is inclined and arranged outside the positioning support 1. Specifically, it is sleeved outside the positioning support 1 and fixed by welding. A chip discharge port is also provided at the low end of the chip guide table 2 for removing iron chips.

[0021] Preferably, there are two iron chip cleaning windows 4 provided on the positioning support 1.

[0022] Preferably, the chip guide table 2 is formed by splicing and welding steel plates with a thickness of 2 mm, and there is an inclination angle of 15° between the table surface of the chip guide table 2 and the table surface of the vertical drilling machine.

[0023] Preferably, a wear-resistant ring 6 is provided in the first stop 7. The outer diameter of the wear-resistant ring 6 is matched with the first stop 7, the inner diameter is in clearance fit with the outer circle of the flange stop of the main reducer housing 9, and the wear-resistant ring 6 is fixed on the quick-change positioning disk 3 by countersunk head bolts.

[0024] The following further illustrates this solution through embodiments. Embodiment

[0025] As Figure 1 shown is a device for countersinking the flange holes of the main reducer housing of the structure of the present utility model, which includes a positioning support 1, a chip guide table 2 and a quick-change positioning disk 3. The positioning support 1 is fixed to the workbench of the vertical drilling machine by two bolts, and the upper part is in interference fit with the second stop 8 of the quick-change positioning disk 3 through the third stop 5 to ensure the overall positioning accuracy of the tooling. The chip guide table 2 is connected to the positioning support 1 by welding. Four countersunk holes are designed on the quick-change positioning disk 3 to achieve quick connection and fixation with the positioning support 1 by threads. Removing the four bolts on the quick-change positioning disk 3 can realize the quick switching of the tooling.

[0026] The positioning support 1 is designed with two iron chip cleaning windows 4, which is convenient for cleaning the iron chips generated after the countersinking processing of the flange holes of the main reducer housing, and at the same time can reduce the weight of the tooling. After the positioning support 1 is subjected to heat treatment and quenching and tempering treatment, its upper and lower surfaces are ground flat by a grinding machine. The third stop 5 is finely ground to achieve the interference fit accuracy between the third stop 5 and the second stop 8, and ensure the overall positioning accuracy of the tooling.

[0027] The chip guide table 2 is composed of steel plates with a thickness of 2 mm spliced and welded, and the table surface of the chip guide table 2 forms an angle of 15° with the workbench surface of the vertical drilling machine. It is convenient for collecting and cleaning iron chips.

[0028] The quick-change positioning disk 3 is made of T10A alloy tool steel. After the upper and lower surfaces, the first stop 7 and the second stop 8 are subjected to heat treatment and quenching and tempering treatment, they are finely processed by a grinding machine. The second stop 8 is in interference fit with the third stop 5 of the connecting seat 2 to ensure the tooling accuracy. The first stop 7 is in clearance fit with the outer circle of the flange stop of the main reducer housing to realize the restriction of degrees of freedom.

[0029] The working process of this embodiment is as follows:

[0030] The positioning support 1 is fixed on the vertical drill table. Place the flange of the main reducer housing on the quick-change positioning disc 3, and place the flange stop in the first stop 7 of the quick-change positioning disc 3. There is a clearance fit between the outer circle of the flange stop of the main reducer housing and the first stop 7 of the quick-change positioning disc 3. Use the vertical drill to countersink the flange holes of the main reducer housing, and manually rotate the main reducer housing 9 to chamfer other flange holes.

[0031] In the structure of the present utility model, the quick-change positioning disc structure is adopted, which not only facilitates the production line operator to countersink the flange holes of the main reducer housing, but also reduces the time and difficulty for the operator to change the tooling. The integrated design of the chip guide table reduces the hygiene maintenance of the production area. This device has a low manufacturing cost, is easy to operate, and can respond to changes in production varieties at any time.

Claims

1. A device for counterboring flange holes of a drive axle main reducer housing, characterized in that: It includes a positioning support (1), a chip guide table (2), and a quick-change positioning plate (3); The positioning support (1) is cylindrical, the lower part of which is bolted to the vertical drilling table, and the upper part of which is provided with a third stop (5); The quick-change positioning plate (3) is annular, with a second stopper (8) provided at the bottom, the second stopper (8) being transitionally matched with the third stopper (5); the quick-change positioning plate (3) is connected to the positioning support (1) by bolts; a first stopper (7) is provided on the inner side of the quick-change positioning plate (3), the first stopper (7) being clearance-matched with the outer circle of the flange stopper of the main reducer housing (9); The chip guide platform (2) is in the shape of a tray and is arranged obliquely on the outside of the positioning support (1); a chip discharge opening is also arranged on the chip guide platform (2).

2. The device for counterboring flange holes of a drive axle main reducer housing according to claim 1, characterized in that: A window (4) for cleaning iron chips is provided on the positioning support (1).

3. The device for counterboring flange holes of a drive axle main reducer housing according to claim 1, characterized in that: The chip guide table (2) is welded from a steel plate with a thickness of 2 mm, and there is an inclination angle of 15° between the table top of the chip guide table (2) and the table top of the vertical drilling machine.

4. The device for counterboring flange holes of a drive axle main reducer housing according to claim 1, characterized in that: A wear-resistant ring (6) is arranged on the inner side of the first stop (7).

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