Clamp for grinding outer circle of cam shaft

Abstract

The utility model discloses a camshaft excircle polishing processing clamp, which comprises a base plate, the top surface of the base plate is provided with a clamping mechanism used for clamping and fixing the position of a camshaft, the clamping mechanism comprises a driving assembly arranged on the top surface of the base plate and used for driving the camshaft to rotate, and the utility model relates to the technical field of camshaft processing. According to the clamp for grinding the outer circle of the cam shaft, the position of the cam shaft can be positioned through the arranged shaft head clamping plate and the arranged base plate, one end of the cam shaft is inserted into the right end of a tip during use, the inner side of the cam shaft extrudes the base plate to drive a connecting plate to press downwards during insertion, and then the shaft head clamping plate is inserted into a cam shaft key groove to position the cam shaft; and meanwhile, when the connecting plate is driven to move through the elastic force of the spring, the base plate is tightly attached to the inner wall of the camshaft to position the camshaft, the situation that the base plate is clamped on the outer side of the camshaft, and consequently the camshaft needs to be disassembled and readjusted in position for polishing during polishing is avoided, use is convenient, and the polishing efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of camshaft processing, in particular to a fixture for grinding the outer circle of a camshaft. Background Art

[0002] The camshaft is a key component in the internal combustion engine. Its main function is to control the opening and closing of the valves. During the processing of the camshaft, the outer circle of the camshaft needs to be polished to remove burrs and processing marks on the surface of the camshaft, improve the surface quality of the camshaft, and ensure its matching accuracy and wear resistance with bearings and other components.

[0003] The existing fixtures for grinding the outer circle of camshafts still have the following problems. The existing devices generally fix the camshaft by clamping the camshaft with a clamping ring. The patent application with reference to publication number CN216228591U discloses a mechanical processing equipment for camshaft grinding. The mechanical processing equipment for camshaft grinding is provided with a set of adjustment fixtures installed on both sides of the processing base, which is convenient for fixing the camshaft from both ends to ensure the stability of the camshaft during grinding. A screw is installed on the support frame, and the screw is screwed to the sliding bracket, so that the second servo motor drives the transmission bevel gear to rotate, and the transmission bevel gear drives the screw to rotate, and adjusts according to the size of the camshaft, thereby solving the problem of inconvenience in fixing camshafts of different sizes, poor stability, and easy errors during grinding.

[0004] However, the above technology clamps and fixes the camshaft by adjusting the clamp, while the clamp of the existing device clamps and fixes the camshaft on the outside of the camshaft. When grinding the camshaft, the outer circle and the outer side of the shaft need to be grinded, which limits the full contact of the grinding tool with the outer circle and the outer side of the camshaft. This requires disassembling the camshaft and readjusting the position of the camshaft before grinding, which is inconvenient to use and has general practicality. Utility Model Content

[0005] In response to the shortcomings of the existing technology, the utility model provides a fixture for grinding the outer circle of the camshaft, which solves the problem that the existing fixture for grinding the outer circle of the camshaft limits the comprehensive contact of the grinding tool with the outer circle of the camshaft and the outside of the shaft, which requires disassembling the camshaft and readjusting the position of the camshaft before grinding, which is inconvenient to use and has general practicality.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: A fixture for grinding the outer circle of a camshaft, comprising a base plate, the top surface of which is provided with a clamping mechanism for clamping and fixing the position of the camshaft, the clamping mechanism comprising:

[0007] A driving assembly is provided on the top surface of the base plate for driving the camshaft to rotate, the driving assembly comprising a mounting bracket fixedly mounted on the top surface of the base plate, and a fixing plate is fixedly mounted on the top surface of the mounting bracket;

[0008] A positioning assembly is provided on the right side of the fixed plate for locating the position of the camshaft, the positioning assembly includes a driving head movably mounted on the right side of the fixed plate, a center and a shifter dog are movably mounted on the right side of the driving head, two first bolts are threadedly mounted on the right side of the shifter dog, a second bolt is threadedly mounted on the top surface of the shifter dog, a shaft head clamp is fixedly mounted on the right side of the shifter dog, and a reinforcement assembly is provided on the right side of the center to improve the stability of the positioning camshaft;

[0009] The connecting assembly is arranged on the top surface of the base plate and is used to clamp the position of the camshaft.

[0010] Preferably, the reinforcement assembly includes two connecting grooves opened inside the movable plate, connecting plates are movably installed inside the two connecting grooves, two limit plates are fixedly installed inside the two connecting grooves, springs are movably installed on the outer sides of the two limit plates, and a pad is fixedly installed on the right end of the connecting plate away from the two springs.

[0011] Preferably, the left ends of the two first bolts are threaded through the right side of the pusher dog and extend to the inside of the driving head, and the bottom end of the second bolt is threaded through the top surface of the pusher dog and extends to the inside of the top.

[0012] Preferably, the right ends of the two connecting grooves pass through the interior of the top and extend to the right side of the movable plate, the right end of the connecting plate movably passes through the interior of the two connecting grooves and extends to the outside of the movable plate, one end of the limit plate movably passes through the opposite side of the connecting plate and is fixedly installed on one side of the two connecting grooves, the opposite ends of the two springs are fixedly installed on one side of the connecting groove, and the ends of the two springs close to the connecting plate are fixedly installed on the opposite side of the connecting plate.

[0013] Preferably, the driving assembly further comprises a DC motor fixedly mounted on the top surface of the mounting frame, and the output end of the DC motor movably passes through the left side of the fixing plate and is fixedly mounted on the left side of the driving head.

[0014] Preferably, the connecting assembly includes a movable groove opened on the right side of the top surface of the base plate, the interior of the movable groove is movably installed on the movable plate, the top surface of the movable plate is fixedly installed with a side plate, the left side of the side plate is movably installed with a movable seat, the interior of the movable groove is movably installed with an adjusting screw, the left end thread of the adjusting screw passes through the right side of the movable plate and is movably installed on the left side of the movable groove, and the right end of the adjusting screw movably passes through the interior of the movable groove and extends to the right side of the base plate. Beneficial effects

[0015] The utility model provides a fixture for grinding the outer circle of a camshaft. Compared with the prior art, it has the following advantages:

[0016] (1) The fixture for grinding the outer circle of the camshaft can locate the position of the camshaft by means of the shaft head clamping plate and the pad. When in use, one end of the camshaft is inserted into the right end of the top. When inserted, the inner side of the camshaft will squeeze the pad and drive the connecting plate to press down. Then the shaft head clamping plate will be inserted into the inside of the camshaft keyway to position the camshaft. At the same time, the elastic force of the spring will drive the connecting plate to move so that the pad is close to the inner wall of the camshaft to position the camshaft and avoid being clamped on the outside of the camshaft, which will cause the camshaft to be disassembled and readjusted before grinding. It is easy to use and improves the grinding efficiency.

[0017] (2) The fixture for grinding the outer circle of the camshaft can improve the stability when grinding the cam by setting a movable seat. After the cam is positioned at the key position through the positioning component, the adjusting screw is rotated to drive the movable plate to move to the right. Then the movable plate will drive the side plate and the movable seat will be against the right end of the camshaft for reinforcement, thereby improving the stability of the camshaft during rotational grinding and having good practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the three-dimensional appearance of the utility model;

[0019] Figure 2 This is a front sectional three-dimensional appearance schematic diagram of the present invention;

[0020] Figure 3 For the utility model Figure 2 A in the middle is an enlarged schematic diagram of the appearance;

[0021] Figure 4 It is a side view cross-sectional three-dimensional appearance schematic diagram of the utility model.

[0022] In the figure: 1-base plate, 2-clamping mechanism, 21-drive assembly, 211-mounting frame, 212-fixed plate, 213-DC motor, 22-positioning assembly, 221-drive head, 222-first bolt, 223-top, 224-second bolt, 225-push claw, 226-axis head clamping plate, 227-connecting plate, 228-connecting groove, 229-pad, 2210-limiting plate, 2211-spring, 23-connecting assembly, 231-movable groove, 232-adjusting screw, 233-movable plate, 234-side plate, 235-movable seat. DETAILED DESCRIPTION

[0023] The following will be combined with the accompanying 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0024] See Figures 1-4 , this utility model provides two technical solutions:

[0025] The first embodiment: A fixture for grinding the outer circle of a camshaft, comprising a base plate 1, a top surface of which is provided with a clamping mechanism 2 for clamping and fixing the position of the camshaft, the clamping mechanism 2 comprising:

[0026] The driving assembly 21 is provided on the top surface of the base plate 1 and is used to drive the camshaft to rotate. The driving assembly 21 includes a mounting bracket 211 fixedly mounted on the top surface of the base plate 1, and a fixing plate 212 is fixedly mounted on the top surface of the mounting bracket 211;

[0027] The positioning assembly 22 is provided on the right side of the fixed plate 212 for locating the position of the camshaft. The positioning assembly 22 includes a driving head 221 movably mounted on the right side of the fixed plate 212. A top 223 and a shifter 225 are movably mounted on the right side of the driving head 221. Two first bolts 222 are threadedly mounted on the right side of the shifter 225. A second bolt 224 is threadedly mounted on the top surface of the shifter 225. A shaft head clamping plate 226 is fixedly mounted on the right side of the shifter 225, and the shaft head clamping plate 226 can be clamped in the keyway of the camshaft to limit its position. A reinforcement assembly is provided on the right side of the top 223 to improve the stability of the positioning of the camshaft.

[0028] The connecting assembly 23 is arranged on the top surface of the base plate 1 for clamping the position of the camshaft. The reinforcing assembly includes two connecting grooves 228 opened inside the movable plate 233. The interiors of the two connecting grooves 228 are movably installed with connecting plates 227. The interiors of the two connecting grooves 228 are fixedly installed with two limit plates 2210. The outer sides of the two limit plates 2210 are movably installed with springs 2211. The right end of the connecting plate 227 away from the two springs 2211 is fixedly installed with a pad 229, and one side of the pad 229 is provided with an anti-slip groove. The left ends of the two first bolts 222 are threaded through the right side of the pusher claw 225 and extend to the interior of the drive head 221. The pusher claw 225 can be connected to the drive head 221 by the two first bolts 222. The bottom end of the second bolt 224 is threaded through the top surface of the pusher claw 225 and extends To the inside of the top 223, and the pusher claw 225 can be connected to the top 223 by the second bolt 224. The right ends of the two connecting grooves 228 pass through the inside of the top 223 and extend to the right side of the movable plate 233. The right end of the connecting plate 227 movably passes through the inside of the two connecting grooves 228 and extends to the outside of the movable plate 233. One end of the two limit plates 2210 movably passes through the opposite side of the connecting plate 227 and is fixedly installed on one side of the two connecting grooves 228. The running trajectory of the connecting plate 227 can be limited by the two limit plates 2210. The opposite ends of the two springs 2211 are fixedly installed on one side of the connecting groove 228. The ends of the two springs 2211 close to the connecting plate 227 are fixedly installed on the opposite sides of the connecting plate 227, and the elastic force of the spring 2211 drives the connecting plate 227 to move.

[0029] The camshaft can be positioned by the shaft head clamping plate 226 and the pad 229. When in use, one end of the camshaft is inserted into the right end of the top 223. When inserted, the inner side of the camshaft will squeeze the pad 229 to drive the connecting plate 227 to press down. Then the shaft head clamping plate 226 will be inserted into the inside of the camshaft keyway to position the camshaft. At the same time, the elastic force of the spring 2211 will drive the connecting plate 227 to move and the pad 229 will be close to the inner wall of the camshaft to position the camshaft, avoiding being clamped on the outside of the camshaft, which will cause the camshaft to be disassembled and readjusted before grinding. It is easy to use and improves the grinding efficiency.

[0030] The second embodiment is different from the first embodiment in that the driving component 21 also includes a DC motor 213 fixedly mounted on the top surface of the mounting frame 211, the output end of the DC motor 213 movably passes through the left side of the fixed plate 212 and is fixedly mounted on the left side of the driving head 221, and starting the DC motor 213 can drive the positioning component 22 to rotate the camshaft for grinding, and the connecting component 23 includes a movable groove 231 opened on the right side of the top surface of the bottom plate 1, the interior of the movable groove 231 is movably mounted on the movable plate 233, and the movable The plate 233 is convex, and a side plate 234 is fixedly installed on the top surface of the movable plate 233. A movable seat 235 is movably installed on the left side of the side plate 234. An adjusting screw 232 is movably installed inside the movable groove 231. The left end of the adjusting screw 232 is threaded through the right side of the movable plate 233 and is movably installed on the left side of the movable groove 231. The right end of the adjusting screw 232 movably passes through the inside of the movable groove 231 and extends to the right side of the bottom plate 1. When the adjusting screw 232 is rotated, the movable seat 235 can move laterally to drive the movable plate 233.

[0031] The movable seat 235 provided can improve the stability when grinding the cam. After the cam's key position is located by the positioning assembly 22, the adjusting screw 232 is rotated to drive the movable plate 233 to move to the right. Then the movable plate 233 drives the side plate 234, and the movable seat 235 is pressed against the right end of the camshaft for reinforcement, thereby improving the stability of the camshaft during rotational grinding, and having good practicality.

[0032] At the same time, the contents not described in detail in this specification belong to the existing technology known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited, and conventional equipment can be used.

[0033] During use, the user installs the base plate 1 in the appropriate position, and then inserts one end of the camshaft into the right end of the top 223. During insertion, the inner side of the camshaft will squeeze the pad 229 to drive the connecting plate 227 to press down, and then the shaft head clamping plate 226 will be inserted into the inside of the camshaft keyway to position the camshaft. At the same time, the elastic force of the spring 2211 will drive the connecting plate 227 to move and the pad 229 will be close to the inner wall of the camshaft. Then the adjusting screw 232 is rotated to drive the movable plate 233 to move to the right, and then the movable plate 233 will drive the side plate 234 and the movable seat 235 will rest against the right end of the camshaft for reinforcement. At this time, starting the DC motor 213 to drive the mounting frame 211 can make the camshaft rotate, and then the outer circle of the camshaft and the outer side of the shaft can be polished.

[0034] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include" or "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0035] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fixture for grinding the outer circle of a camshaft, comprising a base plate (1), characterized in that: The top surface of the base plate (1) is provided with a clamping mechanism (2) for clamping and fixing the position of the camshaft, and the clamping mechanism (2) comprises: A drive assembly (21) is arranged on the top surface of the base plate (1) and is used to drive the camshaft to rotate. The drive assembly (21) includes a mounting frame (211) fixedly mounted on the top surface of the base plate (1), and a fixing plate (212) is fixedly mounted on the top surface of the mounting frame (211); A positioning assembly (22) is arranged on the right side of the fixed plate (212) for positioning the camshaft. The positioning assembly (22) includes a driving head (221) movably mounted on the right side of the fixed plate (212). A top (223) and a shifter (225) are movably mounted on the right side of the driving head (221). Two first bolts (222) are threadedly mounted on the right side of the shifter (225). A second bolt (224) is threadedly mounted on the top surface of the shifter (225). A shaft head clamping plate (226) is fixedly mounted on the right side of the shifter (225). A reinforcement assembly is provided on the right side of the top (223) for improving the stability of the positioning camshaft. A connecting assembly (23) is provided on the top surface of the base plate (1) and is used to clamp the position of the camshaft.

2. A fixture for grinding the outer circle of a camshaft according to claim 1, characterized in that: The reinforcement assembly comprises two connecting grooves (228) provided inside the movable plate (233), a connecting plate (227) being movably mounted inside the two connecting grooves (228), two limiting plates (2210) being fixedly mounted inside the two connecting grooves (228), springs (2211) being movably mounted on the outsides of the two limiting plates (2210), and a pad (229) being fixedly mounted on the right end of the connecting plate (227) away from the two springs (2211).

3. The fixture for grinding the outer circle of a camshaft according to claim 1, characterized in that: The left ends of the two first bolts (222) are threaded through the right side of the pusher claw (225) and extend to the inside of the driving head (221), and the bottom end of the second bolt (224) is threaded through the top surface of the pusher claw (225) and extends to the inside of the top (223).

4. The fixture for grinding the outer circle of a camshaft according to claim 2, characterized in that: The right ends of the two connecting grooves (228) pass through the interior of the top (223) and extend to the right side of the movable plate (233); the right end of the connecting plate (227) movably passes through the interior of the two connecting grooves (228) and extends to the outside of the movable plate (233); one end of the limiting plate (2210) movably passes through the opposite side of the connecting plate (227) and is fixedly installed on one side of the two connecting grooves (228); the opposite ends of the two springs (2211) are fixedly installed on one side of the connecting groove (228); and the ends of the two springs (2211) close to the connecting plate (227) are fixedly installed on the opposite side of the connecting plate (227).

5. The fixture for grinding the outer circle of a camshaft according to claim 1, characterized in that: The drive assembly (21) further includes a DC motor (213) fixedly mounted on the top surface of the mounting frame (211), wherein an output end of the DC motor (213) movably passes through the left side of the fixing plate (212) and is fixedly mounted on the left side of the drive head (221).

6. The fixture for grinding the outer circle of a camshaft according to claim 1, characterized in that: The connecting assembly (23) includes a movable groove (231) provided on the right side of the top surface of the base plate (1), the movable groove (231) is movably mounted on the movable plate (233), a side plate (234) is fixedly mounted on the top surface of the movable plate (233), a movable seat (235) is movably mounted on the left side of the side plate (234), an adjusting screw (232) is movably mounted on the inside of the movable groove (231), a left end thread of the adjusting screw (232) passes through the right side of the movable plate (233) and is movably mounted on the left side of the movable groove (231), and a right end of the adjusting screw (232) passes through the inside of the movable groove (231) and extends to the right side of the base plate (1).

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