A polishing device for the production of automotive parts

Abstract

The present invention discloses a polishing device for automobile part production, which relates to the technical field of automobile part production. It includes a housing, wherein a driving motor is fixedly arranged on the inner wall of the housing, a chuck one is fixedly arranged at the output end of the driving motor, and a chuck two is rotatably arranged on the side of the inner wall of the housing opposite to the driving motor. For this polishing device for automobile part production, in view of the characteristic that the position distribution laws of the connecting rod journal and the main journal in the automobile crankshaft are staggered, a rotating structure with the same axial center distance as that between the connecting rod journal and the main journal is arranged in the polishing equipment, and this structure is kept rotating synchronously with the crankshaft during polishing, so as to imitate the rotation path of the connecting rod journal. Then, the position of the polishing device is changed by using this rotating structure, and at the same time, the crankshaft and the polishing device are fixed. Finally, the synchronous movement of the polishing device and the crankshaft is realized, and the contact pressure between the sand belt and the connecting rod journal remains unchanged, achieving the purpose of uniformly polishing the connecting rod journal.

Description

Technical Field

[0001] The invention relates to the technical field of automobile parts production, in particular to a polishing device for automobile parts production. Background Art

[0002] With the development of science and technology, automobile manufacturing technology has been significantly improved, and with it comes the improvement of the process requirements for automobile parts. Polishing has always been an important processing method for automobile parts. Excellent polishing technology can significantly improve the surface quality of automobile parts, making them more delicate and smooth, and can also increase wear resistance and corrosion resistance. Among the many parts of a car, the crankshaft is the main rotating part of the engine. It is in a high-speed rotation state when it starts, so it requires higher wear resistance during production, and thus has higher requirements for polishing.

[0003] In the production of existing crankshafts, abrasive belt polishing is often used. The parts of the crankshaft that need to be polished are divided into two parts: the connecting rod neck shaft and the main neck shaft. Although the main neck shaft is separated by the connecting rod neck shaft, they are located on the same axis. Therefore, during polishing, the pressure between its outer side and the abrasive belt remains at a uniform value. However, the connecting rod neck shaft and the main neck shaft are not on the same axis. This causes the pressure between the connecting rod neck shaft and the abrasive belt to always change when the crankshaft rotates, which in turn causes the side surface of the connecting rod neck shaft to be unable to be polished uniformly. Summary of the invention

[0004] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] The technical problem to be solved by the present invention is that, in view of the above-mentioned defects of the prior art, a polishing device for automobile parts production is provided, which can utilize the staggered arrangement of the connecting rod neck shafts of the crankshaft to maintain the uniformity of the pressure between the connecting rod neck shafts and the sanding belt when in use.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: A polishing device for automobile parts production, comprising a housing, a driving motor is fixedly arranged on the inner wall of the housing, a chuck 1 is fixedly arranged on the output end of the driving motor, a chuck 2 is rotatably arranged on the side of the inner wall of the housing directly facing the driving motor, and the chuck 1 and the chuck 2 are coaxially arranged;

[0007] Support plate, the support plate is arranged inside the housing, a grinding mechanism for polishing the connecting rod journal is arranged at the top of the support plate, a first follower mechanism and a second follower mechanism that rotate following the crankshaft are arranged at the bottom of the support plate, there are multiple support plates, and they are respectively installed inside the housing through the first follower mechanism and the second follower mechanism;

[0008] The grinding mechanism includes a rotating motor, a rotating roller, a support frame, a connecting plate, a first spring, a fixed frame, a rotating clamping plate, a guiding roller, a first convex block, a lifting plate, a top roller, a second convex block, a second spring and a sand belt. The rotating motor is fixedly arranged on the side of the support plate through a bracket, the rotating roller is fixedly arranged at the output end of the rotating motor, the rotating motor is used to drive the rotating roller to rotate, there are a pair of support frames and they are symmetrically arranged on the top of the support plate, the support plate is rotatably arranged on the top of the support plate through a bracket, connecting plates are rotatably arranged on both sides of the support frame, there are a pair of first springs and they are symmetrically arranged on both sides of the support frame, and the two ends of each first spring are respectively fixedly arranged on the opposite sides of different connecting plates;

[0009] The fixed frame is fixedly arranged on the top of the support plate, the fixed frame is located between the two support frames, the rotating clamping plate is rotatably arranged on the top of the fixed frame through a bracket, there are a pair of rotating clamping plates and they are symmetrically arranged on both sides of the connecting rod journal during work, the guiding roller is rotatably arranged at the end of the rotating clamping plate far away from the fixed frame, the first convex block is fixedly arranged at the end of the rotating clamping plate close to the fixed frame, the lifting plate penetrates and is slidably arranged at the center of the top of the fixed frame, the top roller is rotatably arranged at the end of the lifting plate close to the connecting rod journal, the second convex block is fixedly arranged on the side of the lifting plate and is slidably matched with the first convex block, and the two ends of the second spring are respectively fixedly arranged at the end of the lifting plate and the inner wall of the fixed frame.

[0010] As a preferred scheme of the polishing device for automobile part production described in the present invention, wherein: the sand belt is respectively sleeved outside the rotating roller, the support frame and the guiding roller. When polishing the crankshaft, the sand belt abuts against the connecting rod journal, and when the rotating roller rotates, it can drive the sand belt to slide around the side of the support frame. There are multiple groups of grinding mechanisms, and each group of grinding mechanisms respectively grinds different connecting rod journals of the same crankshaft during work to ensure the polishing efficiency.

[0011] As a preferred embodiment of the polishing device for automobile part production according to the present invention, wherein: the first follower mechanism includes a fixed plate, a first follower rotating shaft, a first rotating plate, a first connecting column, a first guide rail, a sliding frame, a lifting column, a lifting groove, a first gear, a second gear and a first transmission chain. The fixed plate is fixedly arranged at the inner bottom of the housing. The first follower rotating shaft is fixedly arranged on the side of the fixed plate. The first rotating plate is fixedly arranged at the end of the first follower rotating shaft away from the fixed plate. The first connecting column is fixedly arranged on the side of the first rotating plate away from the first follower rotating shaft. The axial distance between the first follower rotating shaft and the first connecting column is the same as the axial distance between the main journal shaft and the connecting rod journal shaft of the crankshaft.

[0012] As a preferred embodiment of the polishing device for automobile part production according to the present invention, wherein: the first guide rail is fixedly arranged at the inner bottom of the housing. The sliding frame is slidably arranged inside the first guide rail. The lifting column is slidably arranged inside the sliding frame. The end of the first connecting column away from the first rotating plate is fixedly arranged on the side of the lifting column. The lifting groove is opened on the side of the sliding frame. The first connecting column is slidably arranged inside the lifting groove. The top of the lifting column is fixedly arranged at the bottom of the support plate.

[0013] As a preferred embodiment of the polishing device for automobile part production according to the present invention, wherein: the first gear is sleeved and fixedly arranged on the side of the first follower rotating shaft. The second gear is sleeved and fixedly arranged on the side of the output end of the driving motor. The two ends of the first transmission chain are respectively sleeved on the sides of the first gear and the second gear and are meshed with the first gear and the second gear. The first follower mechanism is divided into two groups. The two groups of the first follower mechanism are symmetrically arranged at the inner bottom of the housing. And the other second gear is sleeved and fixedly arranged on the side of the rotating shaft of the second chuck.

[0014] As a preferred embodiment of the polishing device for automobile part production according to the present invention, wherein: the second follower mechanism includes a second follower rotating shaft, a second rotating plate, a second connecting column, a telescopic rod, a second guide rail, a sliding column, a follower frame, a third gear, a fourth gear and a second transmission chain. The second follower rotating shaft is rotatably arranged inside the housing. The second rotating plate is fixedly arranged at the end of the second follower rotating shaft away from the housing. The second connecting column is fixedly arranged on the side of the second rotating plate away from the second follower rotating shaft. The axial distance between the second follower rotating shaft and the second connecting column is the same as the axial distance between the main journal shaft and the connecting rod journal shaft of the crankshaft.

[0015] As a preferred embodiment of the polishing device for automobile part production according to the present invention, wherein: the telescopic rod is fixedly arranged at the inner bottom of the housing. The second guide rail is fixedly arranged at the output end of the telescopic rod. The sliding column is slidably arranged inside the second guide rail. The top of the sliding column is fixedly arranged at the bottom of the support plate. One end of the follower frame is fixedly arranged on both sides of the sliding column. The end of the follower frame away from the sliding column is close to the inner top of the housing and is fixedly connected with the end of the second connecting column away from the second rotating plate.

[0016] As a preferred solution of the polishing device for automobile parts production according to the present invention, the following is provided: The third gear is sleeved and fixedly arranged on the side of the output end of the driving motor, the fourth gear is sleeved and fixedly arranged on the side of the second follower shaft, both ends of the second transmission chain are respectively sleeved on the sides of the third gear and the fourth gear and meshed with the third gear and the fourth gear. The second follower mechanism is also divided into two groups and symmetrically arranged at the inner bottom of the housing. The other group of the fourth gear is sleeved and fixedly arranged on the side of the rotating shaft of the second chuck.

[0017] Advantages of the present invention: For the polishing device for automobile parts production, in view of the characteristic that the position distribution laws of the connecting rod journal shaft and the main journal shaft in the automobile crankshaft are staggered, a rotating structure with the same axial center distance as that between the connecting rod journal shaft and the main journal shaft is arranged in the polishing equipment, and this structure is kept rotating synchronously with the crankshaft during polishing, thereby imitating the rotation path of the connecting rod journal shaft. Then, the position of the polishing device is changed by using this rotating structure, and at the same time, the crankshaft and the polishing device are fixed, finally realizing the effect that the polishing device and the crankshaft move synchronously and the contact pressure between the abrasive belt and the connecting rod journal shaft remains unchanged, achieving the purpose of uniformly polishing the connecting rod journal shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 It is a schematic diagram of the overall structure of the polishing device for automobile parts production according to the present invention.

[0020] Figure 2 It is a half-sectional view of the housing according to the present invention.

[0021] Figure 3 It is a schematic diagram of the internal structure of the housing according to the present invention.

[0022] Figure 4 It is a schematic diagram of the structure of the grinding mechanism according to the present invention.

[0023] Figure 5 It is a schematic diagram of the top structure of the support plate according to the present invention.

[0024] Figure 6 It is a schematic diagram of the structure of the lifting plate according to the present invention.

[0025] Figure 7 It is a schematic diagram of the structure of the crankshaft according to the present invention.

[0026] Reference signs: A, connecting rod journal shaft; B, main journal shaft; 1, housing; 2, drive motor; 3, chuck one; 4, chuck two; 5, support plate; 6, grinding mechanism; 601, rotating motor; 602, rotating roller; 603, support frame; 604, connecting plate; 605, spring one; 606, fixing frame; 607, rotating clamping plate; 608, guide roller; 609, convex block one; 610, lifting plate; 611, top roller; 612, convex block two; 613, spring two; 614, abrasive belt; 7, first follow-up mechanism; 701, fixing plate; 702, follow-up rotating shaft one; 703, rotating plate one; 704, connecting column one; 705, guide rail one; 706, sliding frame; 707, lifting column; 708, lifting groove; 709, gear one; 710, gear two; 711, drive chain one; 8, second follow-up mechanism; 801, follow-up rotating shaft two; 802, rotating plate two; 803, connecting column two; 804, telescopic rod; 805, guide rail two; 806, sliding column; 807, follow-up frame; 808, gear three; 809, gear four; 810, drive chain two. Detailed implementation manners

[0027] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the following detailed description of the specific implementation manners of the present invention will be given with reference to the accompanying drawings of the specification.

[0028] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0029] Secondly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure or characteristic that can be included in at least one implementation manner of the present invention. The "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it an individual or alternative embodiment that excludes other embodiments.

[0030] Furthermore, the present invention will be described in detail with reference to the schematic diagrams. When describing the embodiments of the present invention in detail, for the convenience of explanation, the cross-sectional views showing the device structure will be enlarged locally not in accordance with the general scale, and the schematic diagrams are only examples and should not limit the scope of protection of the present invention herein. In addition, in actual production, three-dimensional spatial dimensions including length, width and depth should be included.

[0031] Embodiment 1

[0032] Referring to Figures 1 - 2 , for the first embodiment of the present invention, a polishing device for the production of automotive parts is provided, including

[0033] The outer shell 1 has a driving motor 2 fixedly arranged on the inner wall thereof. The output end of the driving motor 2 is fixedly provided with a first chuck 3. On the side of the inner wall of the outer shell 1 opposite to the driving motor 2, a second chuck 4 is rotatably arranged. The first chuck 3 and the second chuck 4 are coaxially arranged.

[0034] A support plate 5 is arranged inside the outer shell 1. A grinding mechanism 6 for polishing the connecting rod neck shaft A is arranged on the top of the support plate 5. A first follower mechanism 7 and a second follower mechanism 8 that follow the rotation of the crankshaft are arranged at the bottom of the support plate 5. There are multiple support plates 5, which are respectively installed inside the outer shell 1 through the first follower mechanism 7 and the second follower mechanism 8.

[0035] Embodiment 2

[0036] Refer to Figures 3 - 6 , which is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that the grinding mechanism 6 includes a rotating motor 601, a rotating roller 602, a support frame 603, a connecting plate 604, a first spring 605, a fixing frame 606, a rotating clamping plate 607, a guiding roller 608, a first convex block 609, a lifting plate 610, a top roller 611, a second convex block 612, a second spring 613 and a sand belt 614. The rotating motor 601 is fixedly arranged on the side of the support plate through a bracket. The rotating roller 602 is fixedly arranged at the output end of the rotating motor 601. The rotating motor 601 is used to drive the rotating roller 602 to rotate. A pair of support frames 603 are symmetrically arranged on the top of the support plate 5. The support frames 603 are rotatably arranged on the top of the support plate 5 through brackets. Connecting plates 604 are rotatably arranged on both sides of the support frames 603. A pair of first springs 605 are symmetrically arranged on both sides of the support frames 603. The two ends of each first spring 605 are respectively fixedly arranged on the opposite sides of different connecting plates 604.

[0037] The fixing frame 606 is fixedly arranged on the top of the support plate 5. The fixing frame 606 is located between the two support frames 603. The rotating clamping plate 607 is rotatably arranged on the top of the fixing frame 606 through a bracket. A pair of rotating clamping plates 607 are symmetrically arranged on both sides of the connecting rod neck shaft A during operation. The guiding roller 608 is rotatably arranged at the end of the rotating clamping plate 607 away from the fixing frame 606. The first convex block 609 is fixedly arranged at the end of the rotating clamping plate 607 close to the fixing frame 606. The lifting plate 610 passes through and is slidably arranged at the center of the top of the fixing frame 606. The top roller 611 is rotatably arranged at the end of the lifting plate 610 close to the connecting rod neck shaft A. The second convex block 612 is fixedly arranged on the side surface of the lifting plate 610 and is slidably matched with the first convex block 609. The two ends of the second spring 613 are respectively fixedly arranged at the end of the lifting plate 610 and the inner wall of the fixing frame 606.

[0038] The abrasive belt 614 is respectively sleeved on the outer sides of the rotating roller 602, the support frame 603 and the guide roller 608. When polishing the crankshaft, the abrasive belt 614 abuts against the connecting rod journal shaft A. When the rotating roller 602 rotates, it can drive the abrasive belt 614 to slide around the side surface of the support frame 603. There are multiple sets of grinding mechanisms 6, and each set of grinding mechanisms 6 respectively grinds different connecting rod journal shafts A of the same crankshaft during operation to ensure the polishing efficiency.

[0039] During use: When polishing the crankshaft of an automobile, the crankshaft needs to be fixed, and during the subsequent polishing process, the first follow-up mechanism 7 and the second follow-up mechanism 8 need to rotate synchronously with the crankshaft. Therefore, during installation, the crankshaft needs to be fixed according to the rotation angles of the first follow-up mechanism 7 and the second follow-up mechanism 8.

[0040] When fixing the crankshaft, place the connecting rod journal shafts A of the crankshaft between the two rotating clamping plates 607, and then press downwards. The abrasive belt 614 is pressed to the inner side of the rotating clamping plate 607. The top roller 611 of the lifting plate 610 is subjected to the pressure of the crankshaft and overcomes the spring two 613 to slide downwards. During the sliding process, the convex block one 609 contacts the convex block two 612, thereby causing the rotating clamping plate 607 to rotate towards the connecting rod journal shaft A and finally clamping each section of the connecting rod journal shaft A, and the abrasive belt 614 is also wrapped around the outer side of the connecting rod journal shaft A together. Finally, the two ends of the crankshaft are completely fixed by the chuck one 3 and the chuck two 4.

[0041] After the installation is completed, the shape of the crankshaft automatically matches the first follow-up mechanism 7 and the second follow-up mechanism 8 because after the last polishing of the equipment, the first follow-up mechanism 7 and the second follow-up mechanism 8 have fixed the grinding mechanism 6, and the rotating clamping plate 607 is located in the middle of the grinding mechanism 6. If the crankshaft wants to match the grinding mechanism 6, it must be consistent with the grinding mechanism 6.

[0042] After the crankshaft is fixed, turn on the rotating motor 601 and the driving motor 2. The rotating motor 601 drives the rotating roller 602 to rotate, and further drives the abrasive belt 614 to rotate, thereby polishing the connecting rod journal shaft A of the crankshaft. Since the crankshaft itself is fixed by the chuck one 3 and the chuck two 4, the lifting plate 610 cannot return to its original position, and the rotating clamping plate 607 is always in the state of clamping the crankshaft. In this state, the abrasive belt 614 can contact the crankshaft with a larger area, thus improving the polishing efficiency. More importantly, when the first follow-up mechanism 7 and the second follow-up mechanism 8 drive the grinding mechanism 6 and the crankshaft to move synchronously, the rotating clamping plate 607 can reduce the small error in the movement between the grinding mechanism 6 and the crankshaft, thereby avoiding the crankshaft from damaging the abrasive belt 614 and at the same time increasing the stability and uniformity of the polishing.

[0043] Among them, the first spring 605 always stretches the support frame 603 outward, which gives the abrasive belt 614 enough space to be pressed by the crankshaft.

[0044] The remaining structures are the same as those in Embodiment 1.

[0045] Embodiment 3

[0046] Referring to Figures 3 - 4 , this is the third embodiment of the present invention. The difference between this embodiment and the second embodiment is that the first follower mechanism 7 includes a fixing plate 701, a first follower rotating shaft 702, a first rotating plate 703, a first connecting column 704, a first guide rail 705, a sliding frame 706, a lifting column 707, a lifting groove 708, a first gear 709, a second gear 710, and a first transmission chain 711. The fixing plate 701 is fixedly arranged at the inner bottom of the housing 1. The first follower rotating shaft 702 is fixedly arranged on the side of the fixing plate 701. The rotating plate is fixedly arranged at the end of the first follower rotating shaft 702 away from the fixing plate 701. The first connecting column 704 is fixedly arranged on the side of the rotating plate away from the first follower rotating shaft 702. The axial distance between the first follower rotating shaft 702 and the first connecting column 704 is the same as the axial distance between the main journal axis B of the crankshaft and the connecting rod journal axis A.

[0047] The first guide rail 705 is fixedly arranged at the inner bottom of the housing 1. The sliding frame 706 is slidably arranged inside the first guide rail 705. The lifting column 707 is slidably arranged inside the sliding frame 706. The end of the first connecting column 704 away from the first rotating plate 703 is fixedly arranged on the side of the lifting column 707. The lifting groove 708 is opened on the side of the sliding frame 706. The first connecting column 704 is slidably arranged inside the lifting groove 708. The top of the lifting column 707 is fixedly arranged at the bottom of the support plate 5.

[0048] The first gear 709 is sleeved and fixedly arranged on the side of the first follower rotating shaft 702. The second gear 710 is sleeved and fixedly arranged on the side of the output end of the driving motor 2. The two ends of the first transmission chain 711 are respectively sleeved on the sides of the first gear 709 and the second gear 710 and meshed with the first gear 709 and the second gear 710. The first follower mechanism 7 is divided into two groups. The two groups of the first follower mechanism 7 are symmetrically arranged at the inner bottom of the housing 1, and the other group of the second gear 710 is sleeved and fixedly arranged on the side of the rotating shaft of the second chuck 4.

[0049] The second follower mechanism 8 includes a second follower rotating shaft 801, a second rotating plate 802, a second connecting column 803, a telescopic rod 804, a second guide rail 805, a sliding column 806, a follower frame 807, a third gear 808, a fourth gear 809 and a second transmission chain 810. The second follower rotating shaft 801 is rotatably arranged inside the housing 1. The second rotating plate 802 is fixedly arranged at one end of the second follower rotating shaft 801 away from the housing 1. The second connecting column 803 is fixedly arranged on one side of the second rotating plate 802 away from the second follower rotating shaft 801. The axial distance between the second follower rotating shaft 801 and the second connecting column 803 is the same as the axial distance between the main journal axis B of the crankshaft and the connecting rod journal axis A.

[0050] The telescopic rod 804 is fixedly arranged at the inner bottom of the housing 1. The second guide rail 805 is fixedly arranged at the output end of the telescopic rod 804. The sliding column 806 is slidably arranged inside the second guide rail 805. The top of the sliding column 806 is fixedly arranged at the bottom of the support plate 5. One end of the follower frame 807 is fixedly arranged on both sides of the sliding column 806. The end of the follower frame 807 away from the sliding column 806 is close to the inner top of the housing 1 and is fixedly connected to the end of the second connecting column 803 away from the second rotating plate 802.

[0051] The third gear 808 is sleeved and fixedly arranged on the side of the output end of the driving motor 2. The fourth gear 809 is sleeved and fixedly arranged on the side of the second follower rotating shaft 801. Both ends of the second transmission chain 810 are respectively sleeved on the sides of the third gear 808 and the fourth gear 809 and are meshed with the third gear 808 and the fourth gear 809. The second follower mechanism 8 is also divided into two groups and is symmetrically arranged at the inner bottom of the housing 1. The other group of the fourth gear 809 is sleeved and fixedly arranged on the side of the rotating shaft of the second chuck 4.

[0052] Among them, the first transmission chain 711 and the second transmission chain 810 can be selected as toothed chains.

[0053] During use: As Figure 7 shown, generally there are four connecting rod journal axes A of the automobile crankshaft. The two middle coaxial connecting rod journal axes A are in one group, and the two coaxial connecting rod journal axes A at both ends are in one group. Therefore, a total of four grinding mechanisms 6 are required to process the connecting rod journal axes A simultaneously. And because the orientations of the two groups of connecting rod journal axes A are exactly opposite, two different follower mechanisms are needed to cooperate with the grinding mechanism 6 to polish the crankshaft.

[0054] When polishing the crankshaft, the rotation of the driving motor 2 drives the crankshaft to rotate. At the same time, the second chuck 4 will also rotate synchronously because it is connected to the crankshaft. Furthermore, the second gear 710 can drive the first gear 709 to rotate through the transmission chain. The first gear 709 drives the rotating plate 703 to rotate through the follower rotating shaft 702, and then drives the connecting column 704 to rotate. The rotation of the connecting column 704 is transmitted to the lifting column 707. Here, the rotational motion of the connecting column 704 is decomposed into the lifting and sliding of the lifting column 707 inside the sliding frame 706 and the reciprocating movement of the sliding frame 706 itself inside the first guide rail 705. The movements of the lifting column 707 and the sliding frame 706 drive the grinding mechanism 6 to move correspondingly through the support plate 5. This enables the grinding mechanism 6 to change its position accordingly as the connecting rod journal A rotates while polishing the connecting rod journal A, so that the contact force between the abrasive belt 614 and the connecting rod journal A remains unchanged, and thus the grinding mechanism 6 can polish the connecting rod journal A evenly.

[0055] The working mode of the second follower mechanism 8 is the same as that of the first follower mechanism 7. The difference is that when the connecting column 803 drives the follower frame 807 to change the position of the grinding mechanism 6, the rotation of the follower frame 807 following the connecting column 803 is decomposed into the up and down movement of the telescopic rod 804 and the reciprocating sliding of the sliding column 806 inside the second guide rail 805.

[0056] Among them, the key points of the operation of the first follower mechanism 7 and the second follower mechanism 8 are that the axial distance between the follower rotating shaft 702 and the connecting column 704 or the follower rotating shaft 801 and the connecting column 803 is the same as the axial distance between the journal shaft of the crankshaft and the connecting rod journal A, and the follower rotating shaft 702 and the follower rotating shaft 801 rotate synchronously with the crankshaft. This enables the rotating structure composed of the follower rotating shaft 702, the rotating plate 703 and the connecting column 704 or the rotating structure composed of the follower rotating shaft 801, the rotating plate 802 and the connecting column 803 to have the same rotation path as the two different connecting rod journals A, so that the grinding mechanism 6 can always move closely along the connecting rod journal A.

[0057] When not working, the structure composed of the follower rotating shaft 702, the rotating plate 703 and the connecting column 704 and the structure composed of the follower rotating shaft 801, the rotating plate 802 and the connecting column 803 should be adjusted to be in the same Figure 3 position. After placing the crankshaft on the abrasive belt 614 in this way, the positions of the two connecting rod journals A are exactly synchronized with the rotating structure composed of the follower rotating shaft 702, the rotating plate 703 and the connecting column 704 or the rotating structure composed of the follower rotating shaft 801, the rotating plate 802 and the connecting column 803.

[0058] The rest of the structure is the same as that of Embodiment 2.

[0059] Importantly, it should be noted that the construction and arrangement of the present application shown in multiple different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who refer to this disclosure should readily understand that many modifications are possible without materially departing from the novel teachings and advantages of the subject matter described in this application (e.g., changes in the dimensions, scales, structures, shapes and proportions of various elements, as well as parameter values (such as temperature, pressure, etc.), installation arrangements, use of materials, colors, orientations, etc.). For example, an element shown as integrally formed may be composed of multiple parts or elements, the positions of the elements may be inverted or otherwise changed, and the nature, number or position of discrete elements may be altered or changed. Accordingly, all such modifications are intended to be included within the scope of the present invention. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "means plus function" clauses are intended to cover the structures that perform the recited function herein, and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0060] In addition, in order to provide a concise description of the exemplary embodiments, all features of the actual embodiments may not be described (i.e., those features that are not relevant to the currently contemplated best mode of carrying out the present invention or those features that are not relevant to implementing the present invention).

[0061] It should be understood that in the development of any actual implementation, as in any engineering or design project, numerous specific implementation decisions may be made. Such development efforts may be complex and time-consuming, but for those of ordinary skill in the art who benefit from this disclosure, the development efforts will be a routine task of design, manufacturing and production without undue experimentation.

[0062] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention may be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A polishing device for automobile parts production, characterized in that: including, a housing (1), on the inner wall of the housing (1), a driving motor (2) is fixedly arranged, at the output end of the driving motor (2), a first chuck (3) is fixedly arranged, on the side of the inner wall of the housing (1) opposite to the driving motor (2), a second chuck (4) is rotatably arranged, and the first chuck (3) and the second chuck (4) are coaxially arranged; a support plate (5), the support plate (5) is arranged inside the housing (1), at the top of the support plate (5), a grinding mechanism (6) for polishing the connecting rod journal is arranged, at the bottom of the support plate (5), a first follower mechanism (7) and a second follower mechanism (8) that follow the rotation of the crankshaft are arranged, there are multiple support plates (5), and they are respectively installed inside the housing (1) through the first follower mechanism (7) and the second follower mechanism (8); the grinding mechanism (6) includes a rotating motor (601), a rotating roller (602), a support frame (603), a connecting plate (604), a first spring (605), a fixing frame (606), a rotating clamping plate (607), a guiding roller (608), a first convex block (609), a lifting plate (610), a top roller (611), a second convex block (612), a second spring (613) and a sand belt (614), the rotating motor (601) is fixedly arranged on the side of the support plate (5) through a bracket, the rotating roller (602) is fixedly arranged at the output end of the rotating motor (601), the rotating motor (601) is used to drive the rotating roller (602) to rotate, there are a pair of support frames (603) and they are symmetrically arranged at the top of the support plate (5), the support frame (603) is rotatably arranged at the top of the support plate (5) through a bracket, on both sides of the support frame (603), connecting plates (604) are rotatably arranged, there are a pair of first springs (605) and they are symmetrically arranged on both sides of the support frame (603), and at both ends of each first spring (605), they are respectively fixedly arranged on the opposite sides of different connecting plates (604); the fixing frame (606) is fixedly arranged at the top of the support plate (5), the fixing frame (606) is located between the two support frames (603), the rotating clamping plate (607) is rotatably arranged at the top of the fixing frame (606) through a bracket, there are a pair of rotating clamping plates (607) and they are symmetrically arranged on both sides of the connecting rod journal during operation, the guiding roller (608) is rotatably arranged at the end of the rotating clamping plate (607) away from the fixing frame (606), the first convex block (609) is fixedly arranged at the end of the rotating clamping plate (607) close to the fixing frame (606), the lifting plate (610) penetrates and is slidably arranged at the center of the top of the fixing frame (606), the top roller (611) is rotatably arranged at the end of the lifting plate (610) close to the connecting rod journal, the second convex block (612) is fixedly arranged on the side of the lifting plate (610) and is in sliding fit with the first convex block (609), and at both ends of the second spring (613), they are respectively fixedly arranged at the end of the lifting plate (610) and the inner wall of the fixing frame (606).

2. The polishing device for automotive parts production according to claim 1, characterized in that: The abrasive belt (614) is sleeved on the outer sides of the rotating roller (602), the support frame (603), and the guide roller (608) respectively. When polishing the crankshaft, the abrasive belt (614) abuts against the connecting rod journal axis. When the rotating roller (602) rotates, it can drive the abrasive belt (614) to slide around the side of the support frame (603). A plurality of grinding mechanisms (6) are provided, and each group of the grinding mechanisms (6) grinds different connecting rod journal axes of the same crankshaft during operation to ensure the polishing efficiency.

3. The polishing device for automotive parts production according to claim 2, wherein: The first follow-up mechanism (7) includes a fixed plate (701), a first follow-up rotating shaft (702), a first rotating plate (703), a first connecting column (704), a first guide rail (705), a sliding frame (706), a lifting column (707), a lifting groove (708), a first gear (709), a second gear (710), and a first transmission chain (711). The fixed plate (701) is fixedly arranged at the inner bottom of the housing (1). The first follow-up rotating shaft (702) is fixedly arranged on the side of the fixed plate (701). The rotating plate is fixedly arranged at the end of the first follow-up rotating shaft (702) away from the fixed plate (701). The first connecting column (704) is fixedly arranged on the side of the rotating plate away from the first follow-up rotating shaft (702). The axial distance between the first follow-up rotating shaft (702) and the first connecting column (704) is the same as the axial distance between the main journal axis and the connecting rod journal axis of the crankshaft.

4. The polishing device for automobile part production according to claim 3, characterized in that: The first guide rail (705) is fixedly arranged at the inner bottom of the housing (1). The sliding frame (706) is slidably arranged inside the first guide rail (705). The lifting column (707) is slidably arranged inside the sliding frame (706). The end of the first connecting column (704) away from the first rotating plate (703) is fixedly arranged on the side of the lifting column (707). The lifting groove (708) is opened on the side of the sliding frame (706). The first connecting column (704) is slidably arranged inside the lifting groove (708). The top of the lifting column (707) is fixedly arranged at the bottom of the support plate (5).

5. The polishing device for automotive parts production according to claim 4, characterized in that: The first gear (709) is sleeved and fixedly arranged on the side of the first follow-up rotating shaft (702). The second gear (710) is sleeved and fixedly arranged on the side of the output end of the driving motor (2). Both ends of the first transmission chain (711) are respectively sleeved on the sides of the first gear (709) and the second gear (710) and are engaged with the first gear (709) and the second gear (710). The first follow-up mechanism (7) is divided into two groups, and the two groups of the first follow-up mechanisms (7) are symmetrically arranged at the inner bottom of the housing (1), and the other group of the second gears (710) is sleeved and fixedly arranged on the side of the rotating shaft of the second chuck (4).

6. The polishing device for automotive parts production according to claim 5, characterized in that: The second follower mechanism (8) includes a second follower rotating shaft (801), a second rotating plate (802), a second connecting column (803), a telescopic rod (804), a second guide rail (805), a sliding column (806), a follower frame (807), a third gear (808), a fourth gear (809), and a second transmission chain (810). The second follower rotating shaft (801) is rotatably arranged inside the housing (1). The second rotating plate (802) is fixedly arranged at one end of the second follower rotating shaft (801) away from the housing (1). The second connecting column (803) is fixedly arranged on one side of the second rotating plate (802) away from the second follower rotating shaft (801). The axial distance between the second follower rotating shaft (801) and the second connecting column (803) is the same as the axial distance between the main journal axis and the connecting rod journal axis of the crankshaft.

7. The polishing device for automotive parts production according to claim 6, characterized in that: The telescopic rod (804) is fixedly arranged at the inner bottom of the housing (1). The second guide rail (805) is fixedly arranged at the output end of the telescopic rod (804). The sliding column (806) is slidably arranged inside the second guide rail (805). The top of the sliding column (806) is fixedly arranged at the bottom of the support plate (5). One end of the follower frame (807) is fixedly arranged on both sides of the sliding column (806). The end of the follower frame (807) away from the sliding column (806) is close to the inner top of the housing (1) and is fixedly connected to the end of the second connecting column (803) away from the second rotating plate (802).

8. The polishing device for automotive parts production according to claim 7, characterized in that: The third gear (808) is sleeved and fixedly arranged on the side of the output end of the driving motor (2). The fourth gear (809) is sleeved and fixedly arranged on the side of the second follower rotating shaft (801). Both ends of the second transmission chain (810) are respectively sleeved on the sides of the third gear (808) and the fourth gear (809) and are meshed with the third gear (808) and the fourth gear (809). The second follower mechanism (8) is also divided into two groups and symmetrically arranged at the inner bottom of the housing (1). The other group of the fourth gear (809) is sleeved and fixedly arranged on the side of the rotating shaft of the second chuck (4).

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