Automobile lower support arm polishing device

Abstract

The invention relates to the technical field of polishing, and discloses an automobile lower support arm polishing device which comprises a base, a workpiece fixing mechanism and a polishing mechanism, the workpiece fixing mechanism comprises a first rotating shaft rotationally connected to the side, close to the base, of the stand column, and a lifting cantilever is arranged on the side face of the first rotating shaft; the polishing mechanism comprises a second rotating shaft rotationally connected to the side, away from the base, of the stand column, the end of the second rotating shaft is fixedly connected with the middle of a downward-pressing cantilever, a polishing roller is arranged on the side, close to the polishing mechanism, of the downward-pressing cantilever, and a counterweight head assembly for adjusting the pressure of the polishing roller is arranged on the side, away from the polishing mechanism, of the downward-pressing cantilever. According to the constant-pressure grinding device, the grinding roller keeps fixed pressure in the grinding process under the action of gravity, the whole grinding device achieves the constant-pressure grinding effect in a lever mode, the structure is simple, and the manufacturing cost and the use cost are low.

Description

Technical Field

[0001] The invention relates to the technical field of grinding, in particular to a grinding device for a lower support arm of an automobile. Background Art

[0002] The chassis structure of a car is composed of four parts: the transmission system, the running system, the steering system and the braking system. The lower arm of the car is used to support the body and the shock absorber, and to buffer the vibration during driving. The lower arm is usually a herringbone structure with a large number of curved surfaces on the surface. Therefore, ordinary machining cannot be directly produced by plate cutting and needs to be processed by casting.

[0003] During casting, two molds are required for clamping, which will result in a circle of raised seams on the side of the workpiece. Therefore, the side of the casting needs to be polished. During the polishing process, the pressure needs to be controlled, which requires precise control of the clamping and pressing of the entire workpiece, thereby increasing the manufacturing cost and difficulty of the entire polishing equipment. Therefore, in order to reduce costs, it is necessary to design a polishing equipment with a simple structure but capable of pressure regulation. Summary of the invention

[0004] The present invention provides a vehicle lower support arm grinding device, which solves the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: A grinding device for a lower support arm of an automobile comprises a base, a column is arranged at the end of the base, and also comprises a workpiece fixing mechanism and a grinding mechanism; the workpiece fixing mechanism comprises a first rotating shaft rotatably connected to a side of the column close to the base, a lifting cantilever is arranged on the side of the first rotating shaft, a clamping assembly is arranged on the side of the lifting cantilever away from the ground, the clamping assembly is detachably connected to the lower support arm workpiece, and the clamping assembly drives the lower support arm workpiece to rotate; the grinding mechanism comprises a second rotating shaft rotatably connected to a side of the column away from the base, the end of the second rotating shaft is fixedly connected to the middle part of the pressing cantilever, a grinding roller is arranged on the side of the pressing cantilever close to the grinding mechanism, and a counterweight head assembly for adjusting the pressure of the grinding roller is arranged on the side of the pressing cantilever away from the grinding mechanism.

[0006] As a preferred technical solution of the present invention, lifting arms are provided on both sides of the first rotating shaft, and the ends of the lifting arms are fixedly connected to gripping rods, which are U-shaped structures. The clamping assembly includes a vertical plate fixedly connected to the middle of the lifting arms, a rotating rod is rotatably connected to the vertical plate on one side, a fixed clamping block is fixedly connected to the middle of the rotating rod near the first rotating shaft, a tightening screw is threadedly connected to the vertical plate on the other side, and a movable clamping block is rotatably connected to the end of the tightening screw, and the axis lines of the rotating rod and the tightening screw are collinearly arranged. A first driving motor is provided on the vertical plate, and the output shaft of the first driving motor is fixedly connected to a first bevel gear, and the first bevel gear is meshingly connected to a second bevel gear fixedly connected to the end of the rotating rod.

[0007] As a preferred technical solution of the present invention, the side of the downward cantilever is provided with a limit rod that cooperates with the column to limit the maximum descending angle of the downward cantilever, and the column is provided with an auxiliary support assembly that cooperates with the limit rod to support the downward cantilever. The auxiliary support assembly includes a deflection rod rotatably connected to the column, a limit plate is provided on the side of the deflection rod, and a limit groove that cooperates with the limit rod is provided at the end of the limit plate, and the deflection plate is fixedly connected to the end of the deflection rod.

[0008] As a preferred technical solution of the present invention, the counterweight head assembly includes a slide groove arranged on the downward pressure cantilever, the slide groove is slidably connected to a sliding beam, a counterweight block is arranged in the middle of the sliding beam, a fixed beam is arranged at the end of the downward pressure cantilever, a transverse screw rod is threadedly connected to the middle of the fixed beam, and the end of the transverse screw rod is rotatably connected to the sliding beam. A second drive motor is arranged on the side of the downward pressure cantilever, the output shaft of the second drive motor is fixedly connected to a third bevel gear, and the third bevel gear is meshedly connected to a fourth bevel gear fixedly connected to the end of the grinding roller.

[0009] The present invention has the following benefits: Through the effect of gravity, the grinding roller maintains a fixed pressure during the grinding process. Even if the height of the contact position of the lower arm workpiece changes during the rotation, the downward pressure applied by the grinding roller always remains constant and stable. At the same time, the pressure of the grinding roller is continuously adjustable through the counterweight head assembly. The entire grinding device uses a lever to achieve the effect of constant pressure grinding. It has a relatively simple structure, and its manufacturing cost and use cost are relatively low, so it is suitable for popularization and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0011] Figure 1 The present invention is a structural schematic diagram of a grinding device for a lower support arm of an automobile.

[0012] Figure 2 The present invention is a front view of a grinding device for a lower support arm of an automobile.

[0013] Figure 3 The present invention is a structural schematic diagram of a lower support arm grinding device of an automobile during grinding.

[0014] Figure 4 The present invention is a structural schematic diagram of a workpiece fixing mechanism in a lower support arm grinding device of an automobile.

[0015] Figure 5 The present invention is a schematic diagram of the structure of a clamping assembly in a grinding device for a lower support arm of an automobile.

[0016] Figure 6 The present invention is a structural schematic diagram of a grinding mechanism in a lower support arm grinding device for an automobile.

[0017] Figure 7 The present invention is a structural schematic diagram of a counterweight head assembly in a lower support arm grinding device of an automobile.

[0018] In the figure: 1. base; 2. column; 3. workpiece fixing mechanism; 4. grinding mechanism; 5. lifting cantilever; 6. clamping assembly; 7. gripping rod; 8. limiting cross bar; 9. vertical plate; 10. rotating rod; 11. fixed clamping block; 12. moving clamping block; 13. tightening screw rod; 14. first drive motor; 15. first bevel gear; 16. second bevel gear; 17. second rotating axis; 18. pressing cantilever; 19. grinding roller; 20. counterweight head assembly; 21. deflection rod; 22. deflection plate; 23. limiting plate; 24. limiting rod; 25. limiting groove; 26. auxiliary support assembly; 27. slide groove; 28. sliding beam; 29. ​​counterweight block; 30. transverse screw rod; 31. fixed beam; 32. second drive motor; 33. third bevel gear; 34. fourth bevel gear; 35. lower arm workpiece; 36. first rotating axis. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] In one embodiment, see Figure 1-Figure 7A vehicle lower arm grinding device comprises a base 1, a column 2 is arranged at the end of the base 1, the base 1 is fixed to the surface of the workbench by bolt connection, the base 1 is arranged in a front-to-back direction, the column 2 is vertically arranged at the front and rear ends of the upper surface of the base 1, and also comprises a workpiece fixing mechanism 3 and a grinding mechanism 4; The workpiece fixing mechanism 3 includes a first rotating shaft 36 rotatably connected to the bottom of the column 2. The first rotating shaft 36 is arranged in a front-to-back direction and the front and rear ends of the first rotating shaft 36 are rotatably connected to the bottom of the column 2. The right end of the lifting cantilever 5 arranged in a left-right direction is fixedly connected to the left side of the first rotating shaft 36. A clamping assembly 6 is arranged on the upper surface of the lifting cantilever 5. The clamping assembly 6 is used to fix the lower arm workpiece 35 to be polished, and the clamping assembly 6 can also drive the lower arm workpiece 35 to rotate after the clamping is completed, so that the entire side of the lower arm workpiece 35 is in contact with the upper grinding mechanism 4, so that the entire side of the lower arm workpiece 35 is effectively polished. The grinding mechanism 4 includes a second rotating shaft 17 rotatably connected to the top of the column 2, the second rotating shaft 17 is arranged in a front-to-back direction, and the front and rear ends of the second rotating shaft 17 are fixedly connected to the right position of the downward pressure cantilever 18 arranged in a left-to-right direction, and the front and rear ends of the grinding roller 19 arranged in a front-to-back direction are rotatably connected at the left end of the downward pressure cantilever 18, and a counterweight head assembly 20 is arranged at the right end of the downward pressure cantilever 18. The counterweight head assembly 20 offsets the vertical downward pressure of the left grinding roller 19, so that under the action of gravity alone, the pressure of the grinding roller 19 on the lower support arm workpiece 35 below is constant and meets the pressure requirement during grinding.

[0021] In one case of the present embodiment, a lifting arm 5 is fixedly connected to both the front and rear sides of the first rotating shaft 36, and a front-to-back limiting cross bar 8 is arranged below the column 2. When the lifting arm 5 rotates counterclockwise, the limiting cross bar 8 can limit the maximum descending height of the lifting arm 5 to prevent the lifting arm 5 from falling directly on the table. In addition, the front and rear ends of a handle 7 arranged in the front-to-back direction are fixedly connected to the left end of the lifting arm 5. The handle 7 is a U-shaped structure with its opening downward, so that the operator can hold the handle 7 conveniently and drive the lifting arm 5 to rotate up and down through the handle 7.

[0022] In one case of the present embodiment, the clamping assembly 6 includes a vertical plate 9 fixedly connected to the middle part of the upper surface of the lifting cantilever 5, the vertical plate 9 on the rear side is rotatably connected to the rotating rod 10 set in the front and rear directions, the front end of the rotating rod 10 is fixedly connected to the fixed clamping block 11, and the upper end of the front vertical plate 9 is threadedly connected to the front and rear direction The tightening screw rod 13 is set in the upper end, and the rear end of the tightening screw rod 13 is rotatably connected to the moving clamping block 12. When the moving clamping block 12 moves backward, the moving clamping block 12 will press the lower arm workpiece 35 against the fixed clamping block 11, thereby achieving the fixing of the lower arm workpiece 35. At the same time, because the axis lines of the tightening screw rod 13 and the rotating rod 10 are collinearly arranged, the lower arm workpiece 35 After the fixation is completed, when the rotating rod 10 on the rear side rotates, the lower arm workpiece 35 will adaptively rotate synchronously, and a first drive motor 14 is set in the middle of the rear side vertical plate 9, and the output shaft of the first drive motor 14 is fixedly connected to the first bevel gear 15, and the first bevel gear 15 is meshed and connected to the second bevel gear 16, and the second bevel gear 16 is fixedly connected to the rear end of the rotating rod 10. The first drive motor 14 rotates the rotating rod 10 through gear transmission, so that the lower arm workpiece 35 can be rotated after clamping is completed, and a controller can be set on the grip rod 7, so that the operator can control the rotation of the lower arm workpiece 35 while holding the grip rod 7. A second drive motor 32 is arranged on the front side of the downward pressure cantilever 18, and the output shaft of the second drive motor 32 is fixedly connected to the third bevel gear 33, the third bevel gear 33 is meshedly connected to the fourth bevel gear 34, and the fourth bevel gear 34 is fixedly connected to the front end of the grinding roller 19. The second drive motor 32 drives the grinding roller 19 to rotate through gear transmission, and the control button of the second drive motor 32 is also arranged on the grip 7, so that after the operator holds the upper grip 7, the rotation of the lower arm workpiece 35 and the rotation of the grinding roller 19 can be effectively carried out.

[0023] In one case of the present embodiment, a limit rod 24 arranged in a front-to-rear direction is arranged at the lower left side of the downward pressing cantilever 18. When the downward pressing cantilever 18 rotates counterclockwise, the limit rod 24 may interfere with the left side of the column 2. At this time, the limit rod 24 achieves the effect of limiting the descending angle of the downward pressing cantilever 18. In order to facilitate clamping of the workpiece, an auxiliary support assembly 26 is arranged on the column 2. The auxiliary support assembly 26 can prop up the downward pressing cantilever 18 so that the grinding roller 19 is at a high position. At this time, the lower arm can be fixed more conveniently. The auxiliary support assembly 26 includes a deflection rod 21 which is arranged in a front-to-back direction and is rotatably connected to the column 2. The front and rear sides of the deflection rod 21 are fixedly connected to the right end of the limit plate 23. The left end of the limit plate 23 is provided with an open limit groove 25. When the pressing cantilever 18 is rotated to the upper left, the limit plate 23 is also rotated to the upper left. At this time, the pressing cantilever 18 is rotated downward, and the limit rod 24 of the pressing cantilever 18 will fall into the slot, so that the pressing cantilever 18 is propped up. At this time, the pressing cantilever 18 cannot fall, and the angle is limited, so the operator can work. The processing of part clamping is carried out, but when grinding processing is required, the pressing cantilever 18 is lifted upwards, and the limit rod 24 is disengaged from the limit groove 25. At this time, under the action of gravity, the limit plate 23 will rotate counterclockwise to a vertically upward state. At this time, when the pressing cantilever 18 falls again, it will not interfere with the limit plate 23, so that the pressing cantilever 18 can move downward normally, and in order to allow the operator to operate the deflection rod 21 more conveniently, the deflection plate 22 is fixedly connected to the front end of the deflection rod 21, and the operator can rotate the deflection rod 21 through the deflection plate 22.

[0024] In one case of this embodiment, the counterweight head assembly 20 includes a slide groove 27 arranged on the right side of the downward pressure cantilever 18, the slide groove 27 is slidably connected to the front and rear ends of the sliding beam 28 arranged in the front and rear directions, a counterweight block 29 is arranged in the middle left part of the sliding beam 28, and is fixedly connected to the fixed beam 31 arranged in the front and rear directions at the right end of the downward pressure cantilever 18, the middle part of the fixed beam 31 is threadedly connected to the transverse screw rod 30, and the left end of the transverse screw rod 30 is rotatably connected to the middle right part of the sliding beam 28. Therefore, the sliding beam 28 can be controlled to move left and right by rotating the transverse screw rod 30, thereby controlling the position of the counterweight block 29 on the downward pressure cantilever 18, thereby changing the pressure of the left grinding roller 19 on the workpiece, which is suitable for grinding workpieces of different materials.

[0025] In one case of this embodiment, the counterweight head assembly 20 includes a slide groove 27 arranged on the downward pressure cantilever 18, the slide groove 27 is slidably connected to a sliding beam 28, a counterweight block 29 is arranged in the middle of the sliding beam 28, a fixed beam 31 is arranged at the end of the downward pressure cantilever 18, a transverse screw rod 30 is threadedly connected to the middle of the fixed beam 31, and the end of the transverse screw rod 30 is rotatably connected to the sliding beam 28.

[0026] During the implementation of this embodiment, the entire grinding device is fixed on the operating table, the lower pressing cantilever 18 is lifted upward, the deflection plate 22 is held, the limit plate 23 is rotated counterclockwise to the upper side, and the lower pressing cantilever 18 is lowered. At this time, the limit rod 24 falls into the limit groove 25, and the lower pressing cantilever 18 is stuck. The lower support arm workpiece 35 to be polished is placed between the fixed clamp block 11 and the movable clamp block 12, and the center position of the lower support arm workpiece 35 is aligned with the center of the fixed clamp block 11, and the tightening screw rod 13 is rotated. The tightening screw rod 13 drives the movable clamp block 12 to move backward, and the movable clamp block 12 and the fixed clamp block 11 fix the lower support arm workpiece 35. At this time, the entire device completes the clamping process, and the left and right positions of the counterweight block 29 are adjusted according to the material of the lower support arm workpiece 35 to change the pressure of the grinding roller 19 on the lower support arm workpiece 35.

[0027] The operator holds the handle 7 and lifts the lifting cantilever 5 clockwise, and the lower arm workpiece 35 moves upward and contacts the grinding roller 19. At this time, the grinding roller 19 is lifted, the limit rod 24 is disengaged from the limit groove 25, and the limit plate 23 rotates to a vertical downward state. First, the first drive motor 14 is started, and the first drive motor 14 drives the lower arm workpiece 35 to rotate. The second drive motor 32 is started, and the grinding roller 19 starts to rotate. The grinding roller 19 grinds the side wall of the lower arm workpiece 35. If there is a part of the side of the lower arm workpiece 35 with more burrs, the first drive motor 14 can be continuously driven in forward and reverse directions at this time, so that the lower arm workpiece 35 Continuous forward and reverse rotation increases the contact time between this position and the grinding roller 19, that is, increases the grinding time. In order to prevent the grinding roller 19 from grinding a certain part of the lower arm workpiece 35 for a long time and causing damage to the lower arm workpiece 35, the lower arm workpiece 35 must be rotated before the grinding roller 19 can be rotated. When the grinding stops, the grinding roller 19 is stopped first, and then the lower arm workpiece 35 is stopped. At this time, the lifting cantilever 5 is rotated counterclockwise and falls on the limiting cross bar 8, pulling up the lower pressing cantilever 18, and rotating the limiting plate 23 to the upper side to support the lower pressing cantilever 18. At this time, the lower arm workpiece 35 can be removed, completing the entire grinding process.

[0028] The present invention is applicable to a lower arm grinding device for automobiles. The grinding roller 19 maintains a fixed pressure during the grinding process through the effect of gravity. Even if the height of the contact position of the lower arm workpiece 35 changes during the rotation, the downward pressure applied by the grinding roller 19 always remains constant and stable. At the same time, the pressure of the grinding roller 19 is continuously adjustable through the counterweight head assembly 20. The entire grinding device uses a lever to achieve the effect of constant pressure grinding. The structure is relatively simple, and the manufacturing cost and the use cost are relatively low. It is suitable for popularization and use.

[0029] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

Claims

1. A vehicle lower arm grinding device, comprising a base, an end of the base is provided with a column, characterized in that: It also includes a workpiece fixing mechanism and a grinding mechanism; The workpiece fixing mechanism comprises a first rotating shaft rotatably connected to a side of the column close to the base, a lifting cantilever is arranged on the side of the first rotating shaft, a clamping assembly is arranged on the side of the lifting cantilever away from the ground, the clamping assembly is detachably connected to the lower arm workpiece, and the clamping assembly drives the lower arm workpiece to rotate; The grinding mechanism includes a second rotating shaft rotatably connected to the side of the column away from the base, the end of the second rotating shaft is fixedly connected to the middle part of the downward pressure cantilever, a grinding roller is arranged on the side of the downward pressure cantilever close to the grinding mechanism, and a counterweight head assembly for adjusting the pressure of the grinding roller is arranged on the side of the downward pressure cantilever away from the grinding mechanism.

2. The automobile lower arm grinding device according to claim 1, characterized in that: Lifting cantilevers are arranged on both sides of the first rotating shaft, and the ends of the lifting cantilevers are fixedly connected with gripping rods, which are U-shaped structures.

3. The vehicle lower arm grinding device according to claim 2, characterized in that: The clamping assembly includes a vertical plate fixedly connected to the middle part of the lifting cantilever, a rotating rod rotatably connected to the vertical plate on one side, a fixed clamping block fixedly connected to the middle part of the rotating rod near the first rotating axis, a tightening screw rod threadedly connected to the vertical plate on the other side, a movable clamping block rotatably connected to the end of the tightening screw rod, and the axial center lines of the rotating rod and the tightening screw rod are arranged colinearly.

4. The vehicle lower arm grinding device according to claim 3, characterized in that: The vertical plate is provided with a first driving motor, the output shaft of the first driving motor is fixedly connected with a first bevel gear, and the first bevel gear is meshedly connected with a second bevel gear fixedly connected with the end of the rotating rod.

5. The vehicle lower arm grinding device according to claim 1, characterized in that: The side surface of the downward pressing cantilever is provided with a limit rod which cooperates with the column to limit the maximum descending angle of the downward pressing cantilever, and the column is provided with an auxiliary support component which cooperates with the limit rod to prop up the downward pressing cantilever.

6. The vehicle lower arm grinding device according to claim 5, characterized in that: The auxiliary support assembly includes a deflection rod rotatably connected to the column, a limit plate is arranged on the side of the deflection rod, a limit groove cooperating with the limit rod is arranged at the end of the limit plate, and the deflection plate is fixedly connected to the end of the deflection rod.

7. The automobile lower arm grinding device according to claim 1, characterized in that: The counterweight head assembly includes a slide groove arranged on the downward pressure cantilever, the slide groove is slidably connected to a sliding beam, a counterweight block is arranged in the middle of the sliding beam, a fixed beam is arranged at the end of the downward pressure cantilever, a transverse screw rod is threadedly connected to the middle of the fixed beam, and the end of the transverse screw rod is rotatably connected to the sliding beam.

8. The vehicle lower arm grinding device according to claim 7, characterized in that: A second drive motor is arranged on the side of the downward pressing cantilever, and the output shaft of the second drive motor is fixedly connected to the third bevel gear, and the third bevel gear is meshedly connected to the fourth bevel gear fixedly connected to the end of the grinding roller.

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