Sleeking cutter for roughness of inner end face of differential mechanism rear shell

Abstract

The utility model relates to the technical field of sleeking cutters, in particular to a sleeking cutter for the roughness of the inner end face of a differential mechanism rear shell, which comprises a cutter handle body, a fixing block is fixedly connected to the upper surface of the cutter handle body, a first groove is formed in the upper surface of the fixing block, and a buffer gasket is fixedly connected to the inner wall of the first groove. An alloy tool bit is fixedly connected to the upper surface of the buffer gasket, a third groove is formed in the upper surface of the alloy tool bit, a ball head is fixedly connected to the inner wall of the third groove, a first connecting plate is fixedly connected to the upper surface of the tool handle body, the first connecting plate is polygonal, and the inner wall of the first connecting plate is fixedly connected with the surface of a fixing block; the upper surface of the knife handle body is fixedly connected with a second connecting plate, the second connecting plate is in a circular arc shape, and the surface of the second connecting plate is fixedly connected with the surface of the first connecting plate. The service life of the cutter can be prolonged, and the replacement frequency of the cutter is reduced.

Description

Technical Field

[0001] The utility model relates to the field of finishing tools, in particular to a finishing tool for finishing the roughness of the inner end surface of a rear housing of a differential. Background Art

[0002] The differential is a mechanism that enables the left and right (or front and rear) driving wheels to rotate at different speeds. It is mainly composed of left and right axle gears, two planetary gears and a gear rack. Its function is to make the left and right wheels roll at different speeds when the car is turning or driving on uneven roads, that is, to ensure that the driving wheels on both sides perform pure rolling motion. The differential is installed to adjust the speed difference between the left and right wheels.

[0003] Under the action of alternating stress, the inner end face of the differential rear case with a higher surface roughness is more likely to produce stress concentration at the microscopic protrusions, thereby causing the initiation and expansion of fatigue cracks. Therefore, the roughness of the inner end face of the differential rear case needs to be polished. The common method on the market is to use a turning tool for direct processing, and the roughness of the inner end face is easy to exceed the tolerance, and the parts are easily unqualified after the tool is worn. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a roughness finishing tool for the inner end surface of a rear housing of a differential.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a differential rear housing inner end surface roughness finishing tool, comprising a handle body, the upper surface of the handle body is fixedly connected to a fixed block, the upper surface of the fixed block is provided with a first groove, the inner wall of the first groove is fixedly connected to a buffer gasket, the upper surface of the buffer gasket is fixedly connected to an alloy cutter head, the upper surface of the alloy cutter head is provided with a third groove, and the inner wall of the third groove is fixedly connected to a ball head.

[0006] As a further description of the above technical solution:

[0007] A first connecting plate is fixedly connected to the upper surface of the handle body, the first connecting plate is in a polygonal shape, the inner wall of the first connecting plate is fixedly connected to the surface of the fixed block, and a second connecting plate is fixedly connected to the upper surface of the handle body, the second connecting plate is in an arc shape, and the surface of the second connecting plate is fixedly connected to the surface of the first connecting plate.

[0008] As a further description of the above technical solution:

[0009] A second groove is formed on the surface of the second connecting plate, and locking bolts are installed on the surface of the second groove. There are two locking bolts, and the ends of the locking bolts are in contact with the surface of the alloy cutter head.

[0010] As a further description of the above technical solution:

[0011] A first through hole is formed on the surface of the second groove. The number of the first through holes is two. The locking bolt passes through the first through hole and extends to the interior of the fixing block.

[0012] As a further description of the above technical solution:

[0013] The upper surface of the fixing block is fixedly connected with a cover plate, the upper surface of the cover plate is provided with a second through hole, and the alloy cutter head passes through the second through hole and extends to the top of the cover plate.

[0014] As a further description of the above technical solution:

[0015] The upper surface of the first connecting plate is fixedly connected to the lower surface of the cover plate, and the upper surface of the second connecting plate is fixedly connected to the lower surface of the cover plate.

[0016] The utility model has the following beneficial effects:

[0017] 1. Compared with the prior art, this type of finishing tool for the roughness of the inner end face of the rear housing of the differential has a buffer gasket, an alloy cutter head, and a ball head. During use, since the ball head of the finishing tool is made of ruby, the ruby ​​cutter head can work for a long time to ensure that the ball head is not worn, and the buffer gasket at the bottom of the alloy cutter head increases the elastic buffer. The tool can adaptively perform floating tracking between 0-0.05mm distance, reduce the margin difference caused by the wear of the turning tool, and ensure the surface roughness of the parts after finishing. Compared with the conventional direct processing with a turning tool, the roughness of the inner end face is easy to exceed the tolerance, and the parts are easy to become unqualified after the tool is worn. The quality risk of customer complaints is increased. The device can increase the service life of the tool, reduce the frequency of tool replacement, and reduce customer complaints due to quality problems.

[0018] 2. Compared with the prior art, the roughness finishing tool for the inner end surface of the rear housing of the differential uses a buffer gasket, an alloy tool head, and a ball head. During use, a margin of 0.01-0.03mm is left each time the turning tool is processed, waiting for the finishing tool to enter the part again for finishing. The contact surface of the finishing tool is relatively small, and finishing can be done at high speed, which can improve the requirements for the end surface roughness of the parts. The parts can be guaranteed to be qualified for a long time after processing, reducing the generation of waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of a differential rear housing inner end surface roughness finishing tool from a first perspective proposed by the utility model;

[0020] Figure 2 A cross-sectional view of a roughness finishing tool for the inner end surface of a differential rear housing proposed by the utility model;

[0021] Figure 3 The utility model provides a tool for finishing the roughness of the inner end surface of the rear housing of a differential Figure 2 A magnified view of the structure at A;

[0022] Figure 4 This is a second-view overall structural schematic diagram of a differential rear housing inner end surface roughness finishing tool proposed by the utility model.

[0023] Legend:

[0024] 1. Tool handle body; 2. First connecting plate; 3. Second connecting plate; 4. Fixed block; 5. First groove; 6. Second groove; 7. First through hole; 8. Alloy tool head; 9. Third groove; 10. Ball head; 11. Locking bolt; 12. Buffer gasket; 13. Cover plate; 14. Second through hole. DETAILED DESCRIPTION

[0025] Reference Figure 1-4 The utility model provides a finishing tool for the roughness of the inner end surface of the rear housing of a differential: comprising a handle body 1, a fixing block 4 is fixedly connected to the upper surface of the handle body 1, a first groove 5 is provided on the upper surface of the fixing block 4, a buffer gasket 12 is fixedly connected to the inner wall of the first groove 5, an alloy cutter head 8 is fixedly connected to the upper surface of the buffer gasket 12, a third groove 9 is provided on the upper surface of the alloy cutter head 8, a ball head 10 is fixedly connected to the inner wall of the third groove 9, since the finishing tool ball head 10 is made of ruby, the surface hardness is HRC ≥ 70 degrees, the hardness of the part itself is only between HB170-230, and the hardness of ruby ​​is the hardness of the part 7-10 times as much, the ruby ​​cutter head can work for a long time to ensure that the ball head is not worn, and the buffer gasket 12 at the bottom of the alloy cutter head 8 increases the elastic buffer. The tool can adaptively perform floating tracking between 0-0.05mm, reducing the allowance difference caused by tool wear, and ensuring the surface roughness of the parts after finishing. When the tool is processed, a 0.01-0.03mm allowance is left each time, waiting for the finishing tool to enter the part again for finishing. The contact area of ​​the finishing tool is relatively small, and high-speed finishing can be performed during finishing, which can improve the requirements for the end face roughness of the parts. The parts can be guaranteed to be qualified for a long time after processing, reducing the generation of waste.

[0026] The upper surface of the handle body 1 is fixedly connected with a first connecting plate 2, the shape of the first connecting plate 2 is polygonal, the inner wall of the first connecting plate 2 is fixedly connected to the surface of the fixing block 4, the upper surface of the handle body 1 is fixedly connected with a second connecting plate 3, the shape of the second connecting plate 3 is arc-shaped, the surface of the second connecting plate 3 is fixedly connected to the surface of the first connecting plate 2, the surface of the second connecting plate 3 is provided with a second groove 6, the surface of the second groove 6 is installed with a locking bolt 11, the number of the locking bolts 11 is two, the end of the locking bolt 11 is fixedly connected to the first connecting plate 2, and the second connecting plate 3 is provided with a second groove 6. Fitting with the surface of the alloy cutter head 8, the surface of the second groove 6 is provided with a first through hole 7, the number of the first through holes 7 is two, the locking bolt 11 passes through the first through hole 7 and extends to the interior of the fixed block 4, the upper surface of the fixed block 4 is fixedly connected with a cover plate 13, the upper surface of the cover plate 13 is provided with a second through hole 14, the alloy cutter head 8 passes through the second through hole 14 and extends to the top of the cover plate 13, the upper surface of the first connecting plate 2 is fixedly connected to the lower surface of the cover plate 13, and the upper surface of the second connecting plate 3 is fixedly connected to the lower surface of the cover plate 13.

[0027] Working principle: Since the ball head 10 of the finishing tool is made of ruby, the surface hardness is HRC ≥ 70 degrees, the hardness of the part itself is only between HB170-230, and the hardness of ruby ​​is 7-10 times that of the part. The ruby ​​cutter head can work for a long time to ensure that the ball head is not worn, and the buffer gasket 12 at the bottom of the alloy cutter head 8 increases the elastic buffer. The tool can adaptively perform floating tracking between 0-0.05mm distance, reducing the margin difference caused by turning tool wear, and ensuring the surface roughness of the part after finishing. During turning tool processing, a margin of 0.01-0.03mm is left each time, waiting for the finishing tool to enter the part again for finishing. The contact surface of the finishing tool is relatively small, and it can be finished at high speed during finishing, which can improve the requirements for the roughness of the end face of the part. The parts can be guaranteed to be qualified for a long time after processing, reducing the generation of waste.

[0028] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A tool for finishing the inner end surface roughness of a differential rear housing, comprising a tool handle body (1), characterized in that: The upper surface of the handle body (1) is fixedly connected to a fixing block (4), the upper surface of the fixing block (4) is provided with a first groove (5), the inner wall of the first groove (5) is fixedly connected to a buffer gasket (12), the upper surface of the buffer gasket (12) is fixedly connected to an alloy cutter head (8), the upper surface of the alloy cutter head (8) is provided with a third groove (9), and the inner wall of the third groove (9) is fixedly connected to a ball head (10).

2. A tool for finishing the inner end surface roughness of a differential rear housing according to claim 1, characterized in that: The upper surface of the handle body (1) is fixedly connected to a first connecting plate (2), the first connecting plate (2) is in the shape of a polygon, the inner wall of the first connecting plate (2) is fixedly connected to the surface of a fixing block (4), and the upper surface of the handle body (1) is fixedly connected to a second connecting plate (3), the second connecting plate (3) is in the shape of an arc, and the surface of the second connecting plate (3) is fixedly connected to the surface of the first connecting plate (2).

3. The tool for finishing the inner end surface of a differential rear housing according to claim 2, characterized in that: A second groove (6) is provided on the surface of the second connecting plate (3), and a locking bolt (11) is installed on the surface of the second groove (6). There are two locking bolts (11), and the ends of the locking bolts (11) are in contact with the surface of the alloy cutter head (8).

4. A tool for finishing the inner end surface roughness of a differential rear housing according to claim 3, characterized in that: A first through hole (7) is formed on the surface of the second groove (6), and there are two first through holes (7). The locking bolt (11) passes through the first through hole (7) and extends to the interior of the fixing block (4).

5. A tool for finishing the inner end surface roughness of a differential rear housing according to claim 4, characterized in that: The upper surface of the fixed block (4) is fixedly connected to a cover plate (13), the upper surface of the cover plate (13) is provided with a second through hole (14), and the alloy cutter head (8) passes through the second through hole (14) and extends to the top of the cover plate (13).

6. The tool for finishing the inner end surface roughness of a differential rear housing according to claim 2, characterized in that: The upper surface of the first connecting plate (2) is fixedly connected to the lower surface of the cover plate (13), and the upper surface of the second connecting plate (3) is fixedly connected to the lower surface of the cover plate (13).

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