Polishing device for crankshaft machining

Abstract

The utility model relates to the technical field of polishing equipment, in particular to a polishing device for crankshaft machining, which comprises a base with a polishing mechanism mounted at the upper end, the polishing mechanism comprises a polishing driving device, a protective cover and a polishing component, the polishing driving device and the protective cover are mounted at the top end of the base, and a transmission shaft is mounted at the output end of the polishing driving device. The end, away from the polishing driving device, of the transmission shaft is slidably connected with the polishing assembly, the polishing assembly comprises a polishing disc and a limiting sliding shaft, one end of the limiting sliding shaft is coaxially fixed to the polishing disc, the other end of the limiting sliding shaft is slidably connected with the transmission shaft, and a pushing assembly is connected between the transmission shaft and the limiting sliding shaft. By the adoption of the structure, when the polishing driving device drives the transmission shaft to drive the polishing disc to rotate through the limiting sliding shaft, the pushing assembly pushes the limiting sliding shaft to drive the polishing disc to move towards the side away from the polishing driving device, constant friction force is always kept between the polishing disc and the surface of the crankshaft, and therefore the relatively stable polishing progress is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of polishing equipment technology, and in particular to a polishing device for crankshaft processing. Background Technology

[0002] The crankshaft is the most important component in an engine. It bears the force transmitted from the connecting rod and converts it into torque, which is then output through the crankshaft to drive other accessories on the engine. During the machining process, the journals of the crankshaft need to be polished to ensure a smooth surface.

[0003] Regarding polishing devices for crankshaft machining, a search reveals, for example, a crankshaft journal polishing device provided by patent publication number CN217255404U, which includes a machining table. A fixed plate is fixedly connected to the rear surface of the machining table, and a connecting ring is provided on the front surface of the fixed plate. A fixed rod is fixedly connected to the top surface of the machining table, and an electric push rod is fixedly connected to the front surface of the fixed rod. A groove is formed on the top surface of the fixed rod, and the output end of the electric push rod extends through the fixed rod into the groove. A slider is fixedly connected to the output end of the electric push rod, and the slider is slidably connected to the groove. An adjustable polishing device is provided on the machining table. By adjusting the distance between two polishing rollers, the polishing rollers come into contact with the crankshaft, thereby completing the polishing of the crankshaft. By adjusting the distance between the two polishing rollers, crankshafts of different diameters can be polished, thus improving the applicability and practicality of the device.

[0004] Based on the above search and in conjunction with existing technology, it has been found that existing polishing devices for crankshaft machining, similar to those disclosed above, generally use springs to accommodate different polishing degrees. However, due to the different deformations of the springs, their elastic force on the polishing part is also different. As polishing progresses, the polishing rate slows down, requiring additional movement of the polishing part, which is inconvenient. Therefore, a polishing device for crankshaft machining is proposed to improve the above problems. Utility Model Content

[0005] In view of the above-mentioned prior art, the technical problem to be solved by this utility model is that the polishing part of the polishing device for crankshaft processing disclosed above generally uses springs to adapt to different polishing degrees. However, due to the different deformation of the springs, their elastic force on the polishing part is also different. As polishing proceeds, the polishing progress slows down, and it is necessary to move the polishing part additionally, which is inconvenient to use.

[0006] To achieve the above objectives, this application provides the following technical solution: a polishing device for crankshaft processing, comprising a base on which a polishing mechanism is mounted at the upper end, the polishing mechanism comprising a polishing drive device, a protective cover and a polishing assembly, the polishing drive device and the protective cover being mounted on the top of the base, the output end of the polishing drive device being mounted with a transmission shaft, and the end of the transmission shaft away from the polishing drive device being slidably connected to the polishing assembly.

[0007] The polishing assembly includes a polishing disc and a limiting slide shaft. One end of the limiting slide shaft is fixed coaxially with the polishing disc, and the other end of the limiting slide shaft is slidably connected to the drive shaft.

[0008] A propulsion assembly is connected between the drive shaft and the limiting slide shaft.

[0009] In the aforementioned polishing apparatus for crankshaft machining, by slidingly connecting the limiting slide shaft to the drive shaft and connecting a propulsion component between the drive shaft and the limiting slide shaft, when the polishing drive device drives the drive shaft to rotate the polishing disc through the limiting slide shaft, the drive shaft pushes the limiting slide shaft to move the polishing disc toward the side away from the polishing drive device through the propulsion component, so that the polishing disc and the crankshaft surface always maintain a relatively constant friction force, thereby ensuring a relatively stable polishing progress.

[0010] As a further supplement to this solution, a limiting groove is provided at the end of the drive shaft away from the polishing drive device, and the limiting slide shaft is slidably sleeved on the inner side of the limiting groove.

[0011] As a further supplement to this solution, the propulsion assembly includes a limiting sleeve, a centrifugal slider, a transmission assembly, a threaded rod, and a propulsion disc;

[0012] The limiting sleeve is fixed to the side end of the drive shaft, the centrifugal slider is slidably installed on the inner side of the limiting sleeve, the sliding direction of the centrifugal slider is perpendicular to the axis of the drive shaft, the push plate is fixedly sleeved on the outer side of the limiting sleeve, a fixing block is installed on the side end of the push plate, the fixing block is threadedly sleeved on the outer side of the threaded rod, and the threaded rod is rotatably installed on the side end of the limiting sleeve.

[0013] The transmission assembly is connected between the centrifugal slider and the threaded rod, and a tension spring is fixed between the centrifugal slider and the limiting sleeve.

[0014] As a further supplement to this solution, the transmission assembly includes a rack and a gear. The rack is fixed to the side end of the centrifugal slider, and the gear is coaxially fixed to the end of the threaded rod, with the gear meshing with the rack.

[0015] As a further supplement to this solution, a partition is fixed on the inner side of the protective cover. The partition has a through hole for the polishing disc to pass through. A rotating ring is rotatably mounted on the partition, and a threaded rod is rotatably mounted on the rotating ring.

[0016] As a further supplement to this solution, a dust collection fan is installed at the rear of the base, and a dust collection duct is fixedly connected between the dust collection end of the dust collection fan and the protective cover.

[0017] In summary, by slidingly connecting the limiting slide shaft to the drive shaft and connecting the drive shaft and the limiting slide shaft with a propulsion component, when the polishing drive device drives the drive shaft to rotate the polishing disc through the limiting slide shaft, the drive shaft pushes the limiting slide shaft to move the polishing disc away from the polishing drive device through the propulsion component. This ensures that the polishing disc and the crankshaft surface maintain a relatively constant frictional force, thereby guaranteeing a relatively stable polishing progress. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall three-dimensional structure in this embodiment;

[0020] Figure 2 This is a schematic diagram of the polishing mechanism in this embodiment;

[0021] Figure 3 This is a schematic diagram of the structure of the protective cover in this embodiment;

[0022] Figure 4 This is a schematic diagram of the structure of the polishing component in this embodiment;

[0023] Figure 5 This is a schematic diagram of the propulsion component in this embodiment.

[0024] In the diagram: 1. Base; 2. Polishing drive device; 3. Protective cover; 4. Dust extraction fan; 5. Dust extraction duct; 6. Partition; 7. Polishing disc; 8. Drive shaft; 801. Limiting slide groove; 9. Limiting slide sleeve; 10. Centrifugal slider; 11. Rack; 12. Gear; 13. Threaded rod; 14. Fixing block; 15. Pushing disc; 16. Tension spring; 17. Rotating ring; 18. Limiting slide shaft. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] The three embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0027] Implementation method 1: Reference Figures 1-5 The polishing device for crankshaft machining shown includes a base 1 with a polishing mechanism mounted on the upper end. The polishing mechanism includes a polishing drive device 2, a protective cover 3, and a polishing assembly. The polishing drive device 2 and the protective cover 3 are both mounted on the top of the base 1. A drive shaft 8 is mounted on the output end of the polishing drive device 2. The polishing drive device 2 can be a conventional electric motor. The end of the drive shaft 8 away from the polishing drive device 2 is slidably connected to the polishing assembly.

[0028] The polishing assembly includes a polishing disc 7 and a limiting slide shaft 18. One end of the limiting slide shaft 18 is coaxially fixed with the polishing disc 7, and the other end of the limiting slide shaft 18 is slidably connected to the drive shaft 8. Specifically, a limiting groove 801 is provided at the end of the drive shaft 8 away from the polishing drive device 2, and the limiting slide shaft 18 is slidably sleeved on the inner side of the limiting groove 801.

[0029] A propulsion assembly is connected between the drive shaft 8 and the limiting slide shaft 18. When the polishing drive device 2 drives the drive shaft 8 to rotate with the polishing disk 7 through the limiting slide shaft 18, the drive shaft 8 pushes the limiting slide shaft 18 with the polishing disk 7 to move away from the polishing drive device 2 through the propulsion assembly, so that the polishing disk 7 and the crankshaft surface always maintain a relatively constant friction force, thereby ensuring a relatively stable polishing progress.

[0030] Regarding the advancement components, specifically, such as Figures 3-5 As shown, the propulsion assembly includes a limiting sleeve 9, a centrifugal slider 10, a transmission assembly, a threaded rod 13, and a propulsion disk 15. The limiting sleeve 9 is fixed to the side end of the transmission shaft 8. The centrifugal slider 10 is slidably mounted on the inner side of the limiting sleeve 9. The sliding direction of the centrifugal slider 10 is perpendicular to the axial direction of the transmission shaft 8. The propulsion disk 15 is fixedly sleeved on the outer side of the limiting sleeve 18. A fixing block 14 is installed on the side end of the propulsion disk 15. The fixing block 14 is threadedly sleeved on the outer side of the threaded rod 13. The threaded rod 13 is rotatably mounted on the side end of the limiting sleeve 9. The transmission assembly is connected between the centrifugal slider 10 and the threaded rod 13. A tension spring 16 is fixed between the centrifugal slider 10 and the limiting sleeve 9.

[0031] like Figure 4As shown, the transmission assembly includes a rack 11 and a gear 12. The rack 11 is fixed to the side end of the centrifugal slider 10, and the gear 12 is coaxially fixed to the end of the threaded rod 13. The gear 12 meshes with the rack 11. When the polishing drive device 2 drives the transmission shaft 8 to rotate the polishing disc 7 through the limiting slide shaft 18, the centrifugal slider 10 slides the rack 11 away from the transmission shaft 8 under the action of centrifugal force. The rack 11 rotates the threaded rod 13 through the gear 12. The rotating threaded rod 13 drives the fixed block 14 to move the push disk 15 away from the polishing drive device 2. The push disk 15 moves synchronously with the polishing disc 7 through the limiting slide shaft 18, so that the polishing disc 7 and the crankshaft surface always maintain a relatively constant friction force, thereby ensuring a relatively stable polishing progress.

[0032] The second implementation method: such as Figures 1-3 As shown, a partition 6 is fixed to the inner side of the protective cover 3. The protective cover 3 has a conventional fixing structure (not shown in the figure) built into the side of the partition 6 away from the polishing drive device 2 for fixing the crankshaft. The partition 6 is provided with a through hole for the polishing disc 7 to pass through. A rotating ring 17 is rotatably mounted on the partition 6. The threaded rod 13 is rotatably mounted on the rotating ring 17. The rotating ring 17 can provide an auxiliary support for the threaded rod 13, so that the threaded rod 13 is not easily deformed due to uneven force. In the idle state, the polishing disc 7 is stored in the side of the partition 6 away from the fixed crankshaft, making room for the crankshaft and facilitating the fixing operation of the crankshaft.

[0033] The third implementation method: such as Figure 1 As shown, a conventional dust extraction fan 4 is installed at the rear end of the base 1. A dust extraction duct 5 is fixedly connected between the dust extraction end of the dust extraction fan 4 and the protective cover 3, which can remove the dust generated during the polishing process in a timely manner.

[0034] The working principle of this utility model is as follows: After fixing the crankshaft to be polished in the preset position inside the protective cover 3, the polishing drive device 2 is started. The polishing drive device 2 drives the transmission shaft 8 to rotate the polishing disc 7 through the limiting slide shaft 18 to polish the surface of the crankshaft. At the same time, the dust generated during the polishing process is removed by the dust suction fan 4 in conjunction with the dust suction pipe 5.

[0035] When the drive shaft 8 rotates, the centrifugal slider 10 slides with the rack 11 away from the drive shaft 8 under the action of centrifugal force. The rack 11 then drives the threaded rod 13 to rotate through the gear 12. The rotating threaded rod 13 drives the fixed block 14 to move the push plate 15 away from the polishing drive device 2. The push plate 15 then moves synchronously with the polishing plate 7 through the limiting slide shaft 18, so that the polishing plate 7 and the crankshaft surface always maintain a relatively constant friction force, thereby ensuring a relatively stable polishing progress.

[0036] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A polishing apparatus for crankshaft machining, comprising a base (1) with a polishing mechanism mounted on its upper end, characterized in that, The polishing mechanism includes a polishing drive device (2), a protective cover (3), and a polishing assembly. The polishing drive device (2) and the protective cover (3) are both installed on the top of the base (1). A drive shaft (8) is installed at the output end of the polishing drive device (2). The end of the drive shaft (8) away from the polishing drive device (2) is slidably connected to the polishing assembly. The polishing assembly includes a polishing disc (7) and a limiting slide shaft (18). One end of the limiting slide shaft (18) is fixed coaxially with the polishing disc (7), and the other end of the limiting slide shaft (18) is slidably connected to the transmission shaft (8). A propulsion assembly is connected between the drive shaft (8) and the limiting slide shaft (18). When the polishing drive device (2) drives the drive shaft (8) to rotate with the polishing disc (7) through the limiting slide shaft (18), the drive shaft (8) pushes the limiting slide shaft (18) with the polishing disc (7) to move away from the polishing drive device (2) through the propulsion assembly.

2. The polishing apparatus for crankshaft machining according to claim 1, characterized in that: The drive shaft (8) is provided with a limiting groove (801) at one end away from the polishing drive device (2), and the limiting shaft (18) is slidably sleeved on the inner side of the limiting groove (801).

3. The polishing apparatus for crankshaft machining according to claim 1, characterized in that: The propulsion assembly includes a limiting sleeve (9), a centrifugal slider (10), a transmission assembly, a threaded rod (13), and a propulsion disc (15). The limiting sleeve (9) is fixed to the side end of the transmission shaft (8), the centrifugal slider (10) is slidably installed on the inner side of the limiting sleeve (9), the sliding direction of the centrifugal slider (10) is perpendicular to the axial direction of the transmission shaft (8), the push disk (15) is fixedly sleeved on the outer side of the limiting slide shaft (18), the side end of the push disk (15) is equipped with a fixing block (14), the fixing block (14) is threadedly sleeved on the outer side of the threaded rod (13), and the threaded rod (13) is rotatably installed on the side end of the limiting sleeve (9); The transmission assembly is connected between the centrifugal slider (10) and the threaded rod (13), and a tension spring (16) is fixed between the centrifugal slider (10) and the limiting sleeve (9).

4. The polishing apparatus for crankshaft machining according to claim 3, characterized in that: The transmission assembly includes a rack (11) and a gear (12). The rack (11) is fixed to the side end of the centrifugal slider (10), and the gear (12) is coaxially fixed to the end of the threaded rod (13), and the gear (12) meshes with the rack (11).

5. A polishing apparatus for crankshaft machining according to claim 3, characterized in that: The inner side of the protective cover (3) is fixed with a partition (6), and the partition (6) is provided with a through hole for the polishing disc (7) to pass through. A rotating ring (17) is rotatably installed on the partition (6), and the threaded rod (13) is rotatably installed on the rotating ring (17).

6. A polishing apparatus for crankshaft machining according to claim 1, characterized in that: A dust-collecting fan (4) is installed at the rear end of the base (1), and a dust-collecting duct (5) is fixedly connected between the dust-collecting end of the dust-collecting fan (4) and the protective cover (3).

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