Grinding and polishing production line for finish machining of differential shell

Abstract

The invention discloses a grinding and polishing production line for finish machining of a differential shell, and belongs to the technical field of polishing. The grinding and polishing production line is provided with a conveying belt, the surface of the conveying belt carries the differential shell to be polished, a grabbing structure is arranged above the conveying belt, and a polishing structure is further arranged below the grabbing structure; the grabbing structure can grab the differential mechanism shell on the surface of the conveying belt into the polishing structure, feeding and discharging before and after polishing are completed, rotation in the horizontal direction can be achieved while rotation in the vertical direction of the differential mechanism shell can be completed at the polishing structure, the inner surface and the outer surface of the differential mechanism shell are polished, and the polishing efficiency is improved. The production continuity and the production efficiency during polishing of the differential shell are improved, and the polishing effect is enhanced.

Description

Technical Field

[0001] The present invention is a grinding and polishing production line for the finish machining of a differential housing, belonging to the technical field of polishing. Background Art

[0002] A differential is a mechanism that enables the left and right (or front and rear) drive wheels to rotate at different speeds. It mainly consists of left and right half-axle gears, two planetary gears, and a gear carrier. Its function is to enable the left and right wheels to roll at different speeds when the vehicle is turning or driving on an uneven road surface, that is, to ensure that the two drive wheels make pure rolling motions. The differential is installed to adjust the speed difference between the left and right wheels. When four-wheel drive is used, in order to drive four wheels, all the wheels must be connected. If the four wheels are mechanically connected together, the vehicle cannot rotate at the same speed when driving on a curve. In order to make the rotation speed of the vehicle on a curve basically consistent, an intermediate differential is needed at this time to adjust the speed difference between the front and rear wheels.

[0003] The differential housing is an important part of the differential. It is mainly used to install the gear part of the differential and is the basis for ensuring the long-term operation of the differential. After the production of the differential housing is completed, its inner and outer surfaces need to be polished. The existing operation mode is manual clamping operation, with low continuity. Moreover, special tools are required for grinding inside, the operation difficulty is high, and the polishing accuracy is difficult to guarantee. Therefore, those skilled in the art have proposed a grinding and polishing production line for the finish machining of a differential housing to solve the problems raised in the above background art. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a grinding and polishing production line for the finish machining of a differential housing in view of the above deficiencies. The present invention can automatically complete the loading and unloading before and after polishing of the differential housing carried by the production line conveyor belt. When the differential housing is polished, while rotating in the vertical direction of the differential housing, it can also rotate in the horizontal direction to polish its inner and outer surfaces, improving the production continuity and production efficiency during the polishing of the differential housing and enhancing the polishing effect.

[0005] To solve the above technical problems, the present invention adopts the following technical solutions: A grinding and polishing production line for the finish machining of a differential housing includes a conveyor belt. Carrying members are uniformly fixed on the surface of the conveyor belt. The carrying members are in the shape of a disc with a depression in the middle, and a column stands in the depression. A grasping structure is provided above the conveyor belt, and a polishing structure is provided below the grasping structure. The polishing structure is located on one side of the conveyor belt.

[0006] Further, the grasping structure includes a slide rail. A slider is arranged in the slide rail track. A lifting cylinder is fixed below the slider. A clamping body is fixed below the lifting cylinder. A stepping motor is arranged inside the clamping body, and a toothed column is connected to the end of the stepping motor.

[0007] Further, vertical plates are provided on both sides of the serrated column. The vertical plates are fixedly connected to the lower surface of the clamping body. A notch is formed in the center of the vertical plate, and a clamping rotating shaft is provided in the notch.

[0008] Further, a clamping gear is fixedly connected to the surface of the clamping rotating shaft, and a clamping arm is also fixedly connected to the surface of the clamping gear. The clamping arm is in a corner shape, and a semi-circular depression is formed at the end.

[0009] Further, the polishing structure includes a stand. A servo motor is fixedly connected to one side surface of the stand. The driving shaft of the servo motor penetrates through the stand. A toothed ring and a rotating arm are provided on the other side of the stand. The toothed ring is annular and is fixedly connected to the side surface of the stand. The rotating arm is fixedly connected to the end of the driving shaft of the servo motor.

[0010] Further, a lower fixing plate is fixedly connected to one side of the lower end of the rotating arm. The lower fixing plate is perpendicular to the rotating arm. A lower wheel shaft is provided in the center of the lower fixing plate. A polishing cylinder is fixedly connected to the upper surface of the lower wheel shaft. Filter holes are distributed on the surface of the polishing cylinder. A first roller is fixedly connected to the lower surface of the lower wheel shaft.

[0011] Further, an upper protrusion and a lower protrusion extend outward from the upper side surface of the rotating arm. An opening and closing plate is provided on one side of the upper protrusion. An upper rotating shaft is connected between the upper protrusion and the opening and closing plate. An upper wheel shaft is provided in the center of the opening and closing plate.

[0012] Further, a pressing column is fixedly connected to the lower surface of the upper wheel shaft. A cover plate is fixedly connected to the lower surface of the pressing column. A bearing is provided between the pressing column and the cover plate.

[0013] Further, a middle rotating shaft is provided on the lower surface of the opening and closing plate. A lower rotating shaft is provided on the upper surface of the lower protrusion. An opening and closing cylinder is connected between the middle rotating shaft and the lower rotating shaft.

[0014] Further, a side plate is fixedly connected to the other side of the rotating arm. A driving gear is provided above the side plate. A second roller is provided below the side plate. The driving gear and the second roller are connected by a connecting rod. The connecting rod between the driving gear and the second roller penetrates through the side plate. The driving gear and the toothed ring are meshed with each other through teeth.

[0015] The present invention adopts the above technical solutions. Compared with the prior art, it has the following technical effects: 1. The present invention is provided with a conveyor belt. The surface of the conveyor belt carries the differential housing to be polished. A grasping structure is provided above the conveyor belt, and a polishing structure is also provided below the grasping structure. The grasping structure can grasp the differential housing on the surface of the conveyor belt into the polishing structure to complete the loading and unloading before and after polishing, improving the production continuity and production efficiency during the polishing of the differential housing.

[0016] 2. When the polishing structure of the present invention polishes the differential case, it can complete the rotation of the differential case in the vertical direction and at the same time achieve the rotation in the horizontal direction to polish its inner and outer surfaces, enhancing the polishing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale and orientation.

[0019] Figure 1 It is the front view of the structure of the present invention; Figure 2 It is the top view of the structure of the present invention; Figure 3 It is the partial enlarged view of the connection structure of the vertical plate, the clamping rotating shaft and the clamping gear of the present invention; Figure 4 It is the connection schematic diagram of the polishing structure of the present invention.

[0020] In the figure: 1 - conveyor belt, 2 - carrier, 3 - column, 4 - slide rail, 5 - polishing structure, 6 - slider, 7 - lifting cylinder, 8 - clamping body, 9 - stepping motor, 10 - vertical plate, 11 - toothed column, 12 - clamping rotating shaft, 13 - clamping gear, 14 - clamping arm, 15 - stand, 16 - servo motor, 17 - toothed ring, 18 - driving gear, 19 - rotating arm, 20 - upper protrusion, 21 - lower protrusion, 22 - upper rotating shaft, 23 - middle rotating shaft, 24 - lower rotating shaft, 25 - opening and closing plate, 26 - upper wheel shaft, 27 - lower wheel shaft, 28 - polishing cylinder, 29 - lower fixing plate, 30 - cover plate, 31 - pressing column, 32 - bearing, 33 - first roller, 34 - side plate, 35 - second roller, 36 - opening and closing cylinder. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] As Figure 1 、 Figure 2 and Figure 3 shown, the grinding and polishing production line for the finish machining of the differential case includes a conveyor belt 1, on the surface of which carriers 2 are uniformly fixed. The carriers 2 are in the shape of a disc with a depression in the middle, and a column 3 stands in the depression. A grasping structure is arranged above the conveyor belt 1, and a polishing structure 5 is arranged below the grasping structure. The polishing structure 5 is located on one side of the conveyor belt 1.

[0022] The grasping structure includes a slide rail 4. A slider 6 is arranged in the track of the slide rail 4. A lifting cylinder 7 is fixedly connected below the slider 6. A clamping body 8 is fixedly connected below the lifting cylinder 7. A stepping motor 9 is arranged inside the clamping body 8. A toothed column 11 is connected to the end of the stepping motor 9. Vertical plates 10 are also arranged on both sides of the toothed column 11. The vertical plates 10 are fixedly connected to the lower surface of the clamping body 8. A notch is formed in the center of the vertical plate 10. A clamping rotating shaft 12 is arranged in the notch. A clamping gear 13 is fixedly connected to the surface of the clamping rotating shaft 12. A clamping arm 14 is also fixedly connected to the surface of the clamping gear 13. The clamping arm 14 is in a corner shape, and a semi-circular depression is formed at the end.

[0023] The operator places the differential housing to be polished into the carrier 2 on the surface of the conveyor belt 1. When the conveyor belt 1 carrying the differential housing to be polished is transported below the slide rail 4, the conveyor belt 1 stops. The slider 6 moves below the slide rail 4 above the carrier 2. The stepping motor 9 starts to rotate. The toothed column 11 drives the clamping gears 13 to move closer together by meshing with the teeth of the clamping gears 13, clamping the differential housing in the semi-circular depression at the end of the clamping arm 14. Then the slider 6 moves above the polishing structure 5.

[0024] As Figure 4 shown, the polishing structure 5 includes a stand 15. A servo motor 16 is fixedly connected to one side surface of the stand 15. The driving shaft of the servo motor 16 penetrates through the stand 15. A toothed ring 17 and a rotating arm 19 are arranged on the other side of the stand 15. The toothed ring 17 is in a ring shape, and teeth are distributed on the surface. The toothed ring 17 is fixedly connected to the side surface of the stand 15. The rotating arm 19 is fixedly connected to the end of the driving shaft of the servo motor 16.

[0025] One side of the lower end of the rotating arm 19 is fixedly connected with a lower fixing plate 29. The lower fixing plate 29 is perpendicular to the rotating arm 19. A lower wheel shaft 27 is arranged at the center of the lower fixing plate 29. A polishing cylinder 28 is fixedly connected to the upper surface of the lower wheel shaft 27. Filter holes are distributed on the surface of the polishing cylinder 28. Metal balls are filled in the polishing cylinder 28. A first roller 33 is fixedly connected to the lower surface of the lower wheel shaft 27.

[0026] An upper protrusion 20 and a lower protrusion 21 also extend outward from the upper side surface of the rotating arm 19. An opening and closing plate 25 is arranged on one side of the upper protrusion 20. An upper rotating shaft 22 is connected between the upper protrusion 20 and the opening and closing plate 25. An upper wheel shaft 26 is arranged at the center of the opening and closing plate 25. A pressing column 31 is fixedly connected to the lower surface of the upper wheel shaft 26. A cover plate 30 is fixedly connected to the lower surface of the pressing column 31. A bearing 32 is arranged between the pressing column 31 and the cover plate 30. The cover plate 30 is used to seal the upper feed port of the polishing cylinder 28.

[0027] A middle rotating shaft 23 is also arranged on the lower surface of the opening and closing plate 25. A lower rotating shaft 24 is arranged on the upper surface of the lower protrusion 21. An opening and closing cylinder 36 is connected between the middle rotating shaft 23 and the lower rotating shaft 24. Usually, the opening and closing cylinder 36 extends out, causing the opening and closing plate 25 to fold and turn upward along the upper rotating shaft 22, and the upper feed port of the polishing cylinder 28 is opened.

[0028] On the other side of the rotating arm 19, a side plate 34 is also fixedly connected. Above the side plate 34, a driving gear 18 is provided. Below the side plate 34, a second roller 35 is provided. The driving gear 18 and the second roller 35 are connected by a connecting rod. The connecting rod between the driving gear 18 and the second roller 35 passes through the side plate 34 and can rotate within the side plate 34. The driving gear 18 and the toothed ring 17 are meshed with each other through teeth. The first roller 33 and the second roller 35 are connected by a belt.

[0029] As Figure 1 , Figure 2 and Figure 4 shown, when the slider 6 carries the differential housing to be polished and moves above the polishing structure 5, the lifting cylinder 7 extends downward, and the clamping arm 14 is inserted into the polishing cylinder 28. The stepping motor 9 rotates reversely for a period of time. The toothed column 11 drives the relative separation between the clamping gears 13 through the meshing of the teeth with the clamping gears 13. The differential housing in the semi-circular depression at the end of the clamping arm 14 drops into the polishing cylinder 28. The lifting cylinder 7 retracts upward, and the opening and closing cylinder 36 retracts, prompting the opening and closing plate 25 to fold and flip downward along the upper rotating shaft 22 to close the feeding port above the polishing cylinder 28. At the same time, the pressing column 31 presses the differential housing tightly in the polishing cylinder 28.

[0030] Then, the servo motor 16 is turned on to rotate, driving the rotating arm 19 to rotate in the vertical direction. The polishing cylinder 28 also follows the rotating arm 19 to rotate in the vertical direction. While the rotating arm 19 rotates in the vertical direction, it will also drive the driving gear 18 above the side plate 34 to rotate vertically on the surface of the toothed ring 17. The meshing between the teeth of the driving gear 18 and the toothed ring 17 drives the driving gear 18 and the second roller 35 to rotate in the horizontal direction. Driven by the belt, the first roller 33 and the lower wheel shaft 27 fixedly connected above it rotate in the horizontal direction with the polishing cylinder 28, so as to realize that the polishing cylinder 28 rotates in the vertical direction and can also rotate in the horizontal direction. The differential housing in the polishing cylinder 28 also rotates in the vertical and horizontal directions accordingly, and then through the frictional tumbling of the balls in the polishing cylinder 28, the inside and outside of the differential housing in the polishing cylinder 28 are polished.

[0031] When the differential housing reaches the set polishing time, the servo motor 16 is turned off, the opening and closing cylinder 36 extends upward, the feeding port above the polishing cylinder 28 is opened, the lifting cylinder 7 extends downward, the clamping arm 14 is inserted into the polishing cylinder 28, the stepping motor 9 rotates forward for a period of time, and the polished differential housing is clamped between the clamping arms 14. The lifting cylinder 7 retracts upward, the slider 6 moves away above the conveyor belt 1, and the polished differential housing is placed into the carrier 2 of the conveyor belt 1, and then continues to carry a new differential housing to be polished, and so on.

[0032] The description of the present invention has been presented for purposes of illustration and description, and is not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments were chosen and described in order to best explain the principles of the invention and its practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.

Claims

1. The grinding and polishing production line for finishing of differential housing is characterized by: The conveyor belt (1) comprises a conveyor (2) evenly fixedly connected to the surface of the conveyor belt (1), the conveyor (2) being in the shape of a disc with a depression in the middle, a column (3) standing in the depression, a gripping structure being provided above the conveyor belt (1), a polishing structure (5) being provided below the gripping structure, and the polishing structure (5) being located on one side of the conveyor belt (1).

2. The grinding and polishing production line for finishing of a differential case according to claim 1, characterized in that: The gripping structure comprises a slide rail (4), a slide block (6) is arranged in the slide rail (4), a lifting cylinder (7) is fixedly connected below the slide block (6), a clamping body (8) is fixedly connected below the lifting cylinder (7), a stepping motor (9) is arranged in the clamping body (8), and a toothed column (11) is connected to the end of the stepping motor (9).

3. The grinding and polishing production line for finishing of a differential case according to claim 2, characterized in that: Vertical plates (10) are also provided on both sides of the toothed column (11). The vertical plates (10) are fixedly connected to the lower surface of the clamping body (8). A notch is provided in the center of the vertical plates (10), and a clamping rotating shaft (12) is provided in the notch.

4. The grinding and polishing production line for finishing of a differential case according to claim 3, characterized in that: A clamping gear (13) is fixedly connected to the surface of the clamping rotating shaft (12), and a clamping arm (14) is also fixedly connected to the surface of the clamping gear (13). The clamping arm (14) is in a corner shape, and a semicircular recess is formed at the end.

5. The grinding and polishing production line for finishing of a differential case according to claim 1, characterized in that: The polishing structure (5) comprises a stand (15), a servo motor (16) is fixedly connected to the surface of one side of the stand (15), a drive shaft of the servo motor (16) passes through the stand (15), and a gear ring (17) and a rotating arm (19) are provided on the other side of the stand (15), the gear ring (17) is ring-shaped, the gear ring (17) is fixedly connected to the side of the stand (15), and the rotating arm (19) is fixedly connected to the end of the drive shaft of the servo motor (16).

6. The grinding and polishing production line for finishing of a differential case according to claim 5, characterized in that: A lower fixing plate (29) is fixedly connected to one side of the lower end of the rotating arm (19), the lower fixing plate (29) being perpendicular to the rotating arm (19), a lower wheel shaft (27) being provided at the center of the lower fixing plate (29), a polishing cylinder (28) being fixedly connected to the upper surface of the lower wheel shaft (27), filter holes being distributed on the surface of the polishing cylinder (28), and a first roller (33) being fixedly connected to the lower surface of the lower wheel shaft (27).

7. The grinding and polishing production line for finishing of a differential case according to claim 5, characterized in that: An upper protrusion (20) and a lower protrusion (21) are further extended outward from the upper side surface of the rotating arm (19); an opening and closing plate (25) is further provided on one side of the upper protrusion (20); an upper rotating shaft (22) is connected between the upper protrusion (20) and the opening and closing plate (25); and an upper wheel shaft (26) is provided at the center of the opening and closing plate (25).

8. The grinding and polishing production line for finishing of a differential case according to claim 7, characterized in that: A crimping column (31) is fixedly connected to the lower surface of the upper wheel shaft (26), a cover plate (30) is fixedly connected to the lower surface of the crimping column (31), and a bearing (32) is provided between the crimping column (31) and the cover plate (30).

9. The grinding and polishing production line for finishing of a differential case according to claim 7, characterized in that: The lower surface of the opening and closing plate (25) is also provided with a middle rotating shaft (23), the upper surface of the lower protrusion (21) is provided with a lower rotating shaft (24), and an opening and closing cylinder (36) is connected between the middle rotating shaft (23) and the lower rotating shaft (24).

10. The grinding and polishing production line for finishing of a differential case according to claim 5, characterized in that: The other side of the rotating arm (19) is also fixedly connected to a side plate (34). A driving gear (18) is provided above the side plate (34). A second roller (35) is provided below the side plate (34). The driving gear (18) and the second roller (35) are connected via a connecting rod. The connecting rod between the driving gear (18) and the second roller (35) passes through the side plate (34). The driving gear (18) and the gear ring (17) are meshed with each other via teeth.

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