An automobile camshaft end face grinding device

Abstract

The present invention relates to the technical field of camshaft processing, and particularly relates to an end face grinding device for an automobile camshaft, which comprises a mounting frame. The mounting frame is divided into a horizontal end and a vertical end. The horizontal end is provided with a movable shaft in a penetrating manner, and a rotating table is fixed at the upper end of the movable shaft. A motor is installed at the upper part of the horizontal end, and the motor is used for driving the movable shaft to rotate. Moreover, a jacking mechanism is arranged at the lower part of the horizontal end, and the jacking mechanism can adaptively push the movable shaft to lift. A height-adjustable mounting seat is arranged at one side of the vertical end, and a three-jaw pneumatic clamp is rotatably connected to the bottom of the mounting seat. The three-jaw pneumatic clamp is coaxially arranged with the rotating table. An installation rod is rotatably arranged at the upper part of the horizontal end, and a plurality of horizontally arranged grinding wheels are arranged on the installation rod. The grinding wheels are used for grinding the workpiece. In the present invention, the two end faces of the cam can be ground without disassembling the camshaft, which improves the efficiency. The power transmission has self-adaptability and maintains good power output.

Description

Technical Field

[0001] The present invention relates to the technical field of camshaft machining, and particularly to an end face grinding device for an automotive camshaft. Background Art

[0002] A camshaft is a component in a piston engine. Its function is to control the opening and closing actions of the valves. Although the rotational speed of the camshaft in a four-stroke engine is half that of the crankshaft, its material is generally special cast iron, and occasionally forgings are used. The camshaft has a main shaft and multiple cams. When the camshaft is machined and formed, it is necessary to grind the two side end faces of its multiple cams.

[0003] After retrieval, CN110370110B discloses an end face grinding device for an automotive camshaft, including a base. A rotating table for placing a workpiece is provided on the base. A clamping block for fixing a tooling is provided above the rotating table. A power mechanism for driving the clamping block to clamp is further provided on the base. A driving mechanism for driving the rotating table to rotate is further provided on the base. A processing device for grinding the workpiece is further provided on the base. The structure of the present invention is simple. By using the up and down movement of the air cylinder, the up and down movement of the grinding wheel sheet is realized. At the same time, by using the rotation of the tooling table, the workpiece is driven to rotate, and the workpiece and the grinding wheel sheet cooperate to complete the grinding work.

[0004] In the above patent, when grinding the two side end faces of the camshaft workpiece, it needs to be disassembled and reinstalled, which is inconvenient to operate and has low efficiency. Moreover, the contact surface between the rotating table and one end of the camshaft cannot ensure sufficient tightening friction, making it difficult to drive the camshaft workpiece to rotate and grind after the rotating table is worn after long-term use. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide an end face grinding device for an automotive camshaft to solve the problems of low efficiency of the existing grinding device and the disadvantages of the driving mechanism.

[0006] Based on the above purpose, the present invention provides an end face grinding device for an automotive camshaft.

[0007] An end face grinding device for an automotive camshaft includes a mounting frame. The mounting frame is divided into a horizontal end and a vertical end. A movable shaft is provided through the horizontal end. A rotating table is fixed at the upper end of the movable shaft. A motor is installed on the upper part of the horizontal end. The motor is used to drive the rotation of the movable shaft. And a lifting mechanism is provided at the lower part of the horizontal end. The lifting mechanism can adaptively push the movable shaft to lift. A height-adjustable mounting seat is provided on one side of the vertical end. And a three-jaw pneumatic clamp is rotatably connected to the bottom of the mounting seat. The three-jaw pneumatic clamp is coaxially arranged with the rotating table. A mounting rod is rotatably provided on the upper part of the horizontal end. And a plurality of horizontally arranged grinding wheel sheets are provided on the mounting rod. The grinding wheel sheets are used to grind the workpiece.

[0008] Further, a rotating shaft is rotatably provided at one side of the bottom of the horizontal end, and a toothed disc is sleeved and fixed on the rotating shaft. The motor can drive the rotating shaft to rotate. A toothed ring is sleeved on the movable shaft, and the toothed disc meshes with the toothed ring.

[0009] Further, the jacking mechanism includes a rotating sleeve and a collar. The rotating sleeve and the collar are both movably sleeved on the rotating shaft, and the rotating sleeve is rotatably connected to the bottom of the collar. First connecting rods are hinged to both sides of the collar, and second connecting rods are hinged to the other ends of the first connecting rods. The other ends of the two second connecting rods are hinged to the outer wall of the rotating shaft. Counterweight balls are provided at the hinge joints of the first connecting rods and the second connecting rods. A connecting block is fixed to one side of the rotating sleeve, and the other end of the connecting block is rotatably connected to the lower end of the movable shaft. The toothed ring is rotatably arranged at the bottom of the horizontal end, and the movable shaft is slidably connected to the toothed ring.

[0010] Further, a turntable is rotatably provided at one end of the upper part of the connecting block, and the turntable is connected to the bottom of the movable shaft. A plurality of limiting convex ribs are provided on the outer wall of the movable shaft, and a plurality of limiting grooves are formed in the inner wall of the toothed ring. The plurality of limiting convex ribs are respectively slidably arranged in the plurality of limiting grooves.

[0011] Further, a chute is formed in the vertical end, and a connecting rod is slidably arranged in the chute. One end of the connecting rod is fixed to one side of the mounting seat. A lead screw is rotatably arranged in the chute, and the lead screw penetrates through the connecting rod and is threadedly connected thereto. The upper end of the lead screw passes through the upper part of the vertical end and is fixed with a handwheel.

[0012] Further, guide rods are fixed to both sides of the vertical end, and the two guide rods penetrate through the connecting rod and are slidably connected thereto.

[0013] Further, a rotating seat is rotatably provided on the upper part of the horizontal end, and a rotating arm is fixed to one side of the rotating seat. The lower end of the mounting rod is fixed to the other end of the rotating arm.

[0014] Further, a pin is inserted through the rotating arm. Two insertion holes are formed in the upper part of the horizontal end. The two insertion holes are distributed around the rotating seat at a certain angle, and the pin is adapted to the insertion holes.

[0015] Further, an arc-shaped guide rail is fixed to one side of the vertical end through a bracket. A guide pin is fixed to the upper part of the mounting rod, and the upper end of the guide pin is slidably arranged in the arc-shaped guide rail.

[0016] Further, a plurality of sliding sleeves are movably sleeved on the mounting rod, and fastening screws are threadedly connected to one sides of the sliding sleeves. The grinding wheels are fixed to one sides of the sliding sleeves.

[0017] Advantages of the present invention:

[0018] 1. In the present invention, through the rotation table and three-jaw pneumatic fixture provided, in cooperation with the multiple grinding wheels arranged on the mounting rod and the jacking mechanism, when in use, we only need to fix and clamp one end of the camshaft through the three-jaw pneumatic fixture, and then adjust the height of the adjustment mounting seat to adjust the cam to a suitable height. At this time, turn the mounting rod to the position of the camshaft so that the multiple grinding wheels are attached to the multiple cam end faces of the camshaft. Then start the motor to make the rotation table rotate, and cooperate with the jacking mechanism to raise the rotation table until it contacts the lower end of the camshaft, driving the camshaft to rotate quickly for grinding. When it is necessary to grind the other end face of the cam of the camshaft, only need to adjust the height of the mounting seat so that the other end face of the cam is attached to the grinding wheel. This device is easy to operate, can realize grinding of both end faces of the cam without disassembling the camshaft, improves efficiency, and the setting of the jacking mechanism enables the rotation table to always keep in contact and abut against the lower end of the camshaft, having self-adaptability and maintaining good power output. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only those of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 is a three-dimensional schematic diagram of an embodiment of the present invention;

[0021] Figure 2 is a bottom three-dimensional schematic diagram of an embodiment of the present invention;

[0022] Figure 3 is a three-dimensional schematic diagram of the jacking mechanism of an embodiment of the present invention;

[0023] Figure 4 is an unfolded schematic diagram of the jacking mechanism of an embodiment of the present invention;

[0024] Figure 5 is a three-dimensional schematic diagram of the mounting rod of an embodiment of the present invention;

[0025] Figure 6 is a three-dimensional schematic diagram of the three-jaw pneumatic fixture of an embodiment of the present invention;

[0026] Figure 7 is a three-dimensional schematic diagram of the mounting bracket of an embodiment of the present invention.

[0027] The reference signs in the figures are:

[0028] 1. Mounting frame; 2. Rotary table; 3. Motor; 4. Mounting base; 5. Three-jaw pneumatic fixture; 6. Connecting rod; 7. Arc-shaped guide rail; 8. Handwheel; 9. Swivel base; 10. Mounting rod; 11. Grinding wheel disc; 12. Rotary arm; 13. Chute; 15. Jack hole; 16. Guide rod; 17. Lead screw; 18. Slide sleeve; 19. Guide pin; 20. Plug pin; 21. Gear disc; 22. Rotating shaft; 23. Movable shaft; 24. Gear ring; 25. Limit convex rib; 26. Turntable; 27. Connecting block; 28. Rotating sleeve; 29. Collar; 30. First connecting rod; 31. Second connecting rod; 32. Limit groove. Detailed implementation manners

[0029] To make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the following further elaborates on the present invention in detail in conjunction with specific embodiments.

[0030] It should be noted that unless otherwise defined, the technical terms or scientific terms used in the present invention should have the ordinary meanings understood by those with ordinary skills in the field to which the present invention pertains. The "first", "second" and similar terms used in the present invention do not denote any order, quantity or importance, but are only used to distinguish different components. The terms such as "comprising" or "including" mean that the elements or objects appearing before this term cover the elements or objects listed after this term and their equivalents, without excluding other elements or objects. The terms such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left" and "right" are only used to represent relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0031] As Figure 1-7 shown, an end face grinding device for an automotive camshaft includes a mounting frame 1. The mounting frame 1 is divided into a horizontal end and a vertical end. The horizontal end is provided with a movable shaft 23 penetrating through it. A rotary table 2 is fixed at the upper end of the movable shaft 23. A motor 3 is installed on the upper part of the horizontal end. The motor 3 is used to drive the rotation of the movable shaft 23. And a jacking mechanism is provided at the lower part of the horizontal end. The jacking mechanism can adaptively push the movable shaft 23 to lift. An adjustable-height mounting base 4 is provided on one side of the vertical end. And a three-jaw pneumatic fixture 5 is rotatably connected to the bottom of the mounting base 4. The three-jaw pneumatic fixture 5 is coaxially arranged with the rotary table 2. A mounting rod 10 is rotatably provided on the upper part of the horizontal end. And a plurality of horizontally arranged grinding wheel discs 11 are provided on the mounting rod 10. The grinding wheel discs 11 are used to grind the workpiece.

[0032] A rotating shaft 22 is rotatably provided at one side of the bottom of the horizontal end. And a gear disc 21 is sleeved and fixed on the rotating shaft 22. The motor 3 can drive the rotation of the rotating shaft 22. A gear ring 24 is sleeved on the movable shaft 23. The gear disc 21 meshes with the gear ring 24.

[0033] The lifting mechanism includes a rotating sleeve 28 and a collar 29. Both the rotating sleeve 28 and the collar 29 are movably sleeved on the rotating shaft 22, and the rotating sleeve 28 is rotatably connected to the bottom of the collar 29. First connecting rods 30 are hinged on both sides of the collar 29. The other ends of the first connecting rods 30 are respectively hinged with second connecting rods 31. The other ends of the two second connecting rods 31 are both hinged on the outer wall of the rotating shaft 22. Counterweight balls are provided at the hinged joints of the first connecting rods 30 and the second connecting rods 31. A connecting block 27 is fixed on one side of the rotating sleeve 28, and the other end of the connecting block 27 is rotatably connected to the lower end of the movable shaft 23. The toothed ring 24 is rotatably arranged at the bottom of the horizontal end, and the movable shaft 23 is slidably connected with the toothed ring 24. When the motor 3 is started to drive the rotating table 2 to rotate, when the rotating shaft 22 rotates, the first connecting rods 30 and the second connecting rods 31 rotate synchronously with it. Under the action of the centrifugal force of the counterweight balls, the collar 29 rises along the rotating shaft 22, driving the movable shaft 23 to lift, so that the rotating table is lifted to contact and drive the lower end of the camshaft, realizing adaptive power transmission.

[0034] One end of the upper part of the connecting block 27 is rotatably provided with a turntable 26, and the turntable 26 is connected to the bottom of the movable shaft 23. A plurality of limiting convex ridges 25 are provided on the outer wall of the movable shaft 23, and a plurality of limiting grooves 32 are opened on the inner wall of the toothed ring 24. The plurality of limiting convex ridges 25 are respectively slidably arranged in the plurality of limiting grooves 32.

[0035] A chute 13 is opened in the vertical end. A connecting rod 6 is slidably arranged in the chute 13, and one end of the connecting rod 6 is fixed to one side of the mounting seat 4. A lead screw 17 is rotatably arranged in the chute 13, and the lead screw 17 penetrates through the connecting rod 6 and is threadedly connected with it. The upper end of the lead screw 17 passes through the upper part of the vertical end and is fixed with a handwheel 8. Rotating the handwheel 8 drives the lead screw 17 to rotate, so that the connecting rod 6 drives the mounting seat 4 to move, and the height of the camshaft is adjusted to adapt to the height of the grinding wheel 11.

[0036] Guide rods 16 are fixed on both sides of the vertical end, and the two guide rods 16 both penetrate through the connecting rod 6 and are slidably connected with it.

[0037] A rotating seat 9 is rotatably arranged on the upper part of the horizontal end, and a rotating arm 12 is fixed on one side of the rotating seat 9. The lower end of the mounting rod 10 is fixed to the other end of the rotating arm 12.

[0038] A pin 20 is inserted through the rotating arm 12. Two jacks 15 are opened on the upper part of the horizontal end. The two jacks 15 are distributed around the rotating seat 9 at a certain angle. The pin 20 is adapted to the jacks 15. The pin 20 on the rotating arm 12 can be lifted to be separated from the jacks 15, and then the rotating arm 12 is rotated so that the mounting rod 10 moves to the position of the camshaft workpiece, and then the pin 20 is inserted into another jack 15.

[0039] An arc-shaped guide rail 7 is fixed on one side of the vertical end through a bracket. A guide pin 19 is fixed on the upper part of the mounting rod 10, and the upper end of the guide pin 19 is slidably arranged in the arc-shaped guide rail 7 to improve the stability of the mounting rod 10.

[0040] A plurality of sliding sleeves 18 are movably sleeved on the mounting rod 10, and fastening screws are threadedly connected to one side of each sliding sleeve 18. The grinding wheels 11 are fixed to one side of the sliding sleeves 18. The fastening screws can be loosened to adjust the distance between the grinding wheels 11 to fit different camshafts.

[0041] Working principle: During use, one end of the camshaft is inserted into the three-jaw pneumatic fixture 5 and fixed and clamped by the three-jaw pneumatic fixture 5, so that the lower end of the camshaft workpiece is aligned with the rotating table 2 and is coaxial with it. Then, the handwheel 8 is rotated to drive the lead screw 17 to rotate, so that the connecting rod 6 drives the mounting seat 4 to move, and the camshaft is adjusted to an appropriate height. At this time, the pin 20 is pulled up to release the swing arm 12, and the mounting rod 10 is rotated to the position of the camshaft, so that the plurality of grinding wheels 11 are attached to the plurality of cam end faces of the camshaft. The motor 3 is started to drive the rotating table 2 to rotate through the rotating shaft 22, the gear disk 21, and the gear ring 24. While the rotating shaft 22 rotates, the first connecting rod 30 and the second connecting rod 31 rotate with it. Under the action of the centrifugal force of the counterweight ball, the collar 29 rises along the rotating shaft 22, and drives the movable shaft 23 to lift through the rotating sleeve 28 and the connecting block 27, so that the rotating table is lifted to contact the lower end of the camshaft, driving the camshaft to rotate and grind quickly. When it is necessary to grind the other end face of the cam of the camshaft, only need to turn off the motor 3, turn out the mounting rod 10, adjust the height of the mounting seat 4 again to change the height of the camshaft, and then turn back the mounting rod 10 so that the other end face of the cam is attached to the grinding wheel 11 for grinding.

[0042] The present invention is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An automobile camshaft end face grinding device, including a mounting frame (1), characterized in that, The mounting bracket (1) is divided into a horizontal end and a vertical end. The horizontal end is provided with a movable shaft (23) running through it. A rotating table (2) is fixed to the upper end of the movable shaft (23). A motor (3) is installed on the upper part of the horizontal end. The motor (3) is used to drive the rotation of the movable shaft (23). And a jacking mechanism is provided at the lower part of the horizontal end. The jacking mechanism can adaptively push the movable shaft (23) to lift. On one side of the vertical end, there is an adjustable mounting seat (4). And a three-jaw pneumatic clamp (5) is rotatably connected to the bottom of the mounting seat (4). The three-jaw pneumatic clamp (5) is coaxially arranged with the rotating table (2). The upper part of the horizontal end is rotatably provided with a mounting rod (10). And a plurality of horizontally arranged grinding wheels (11) are provided on the mounting rod (10). The grinding wheels (11) are used for grinding workpieces. On one side of the bottom of the horizontal end, a rotating shaft (22) is rotatably provided. And a toothed disc (21) is sleeved and fixed on the rotating shaft (22). The motor (3) can drive the rotation of the rotating shaft (22). A toothed ring (24) is sleeved on the movable shaft (23). The toothed disc (21) meshes with the toothed ring (24). The jacking mechanism includes a rotating sleeve (28) and a collar (29). The rotating sleeve (28) and the collar (29) are both movably sleeved on the rotating shaft (22). And the rotating sleeve (28) is rotatably connected to the bottom of the collar (29). A first connecting rod (30) is hinged to both sides of the collar (29). The other ends of the first connecting rods (30) are both hinged to a second connecting rod (31). The other ends of the two second connecting rods (31) are both hinged to the outer wall of the rotating shaft (22). Counterweight balls are provided at the hinged joints of the first connecting rod (30) and the second connecting rod (31). A connecting block (27) is fixed to one side of the rotating sleeve (28). And the other end of the connecting block (27) is rotatably connected to the lower end of the movable shaft (23). The toothed ring (24) is rotatably arranged at the bottom of the horizontal end. And a sliding connection is provided between the movable shaft (23) and the toothed ring (24). A rotating seat (9) is rotatably provided on the upper part of the horizontal end. And a rotating arm (12) is fixed to one side of the rotating seat (9). The lower end of the mounting rod (10) is fixed to the other end of the rotating arm (12). A pin (20) is inserted through the rotating arm (12). Two jack holes (15) are opened on the upper part of the horizontal end. The two jack holes (15) are distributed around the rotating seat (9) at a certain angle. The pin (20) is adapted to the jack hole (15).

2. The end face grinding device for an automobile camshaft according to claim 1, wherein, One end of the upper part of the connecting block (27) is rotatably provided with a turntable (26). And the turntable (26) is connected to the bottom of the movable shaft (23). A plurality of limiting ridges (25) are provided on the outer wall of the movable shaft (23). A plurality of limiting grooves (32) are opened on the inner wall of the toothed ring (24). The plurality of limiting ridges (25) are respectively slidably arranged in the plurality of limiting grooves (32).

3. An automobile camshaft end face grinding device according to claim 2, characterized in that, A sliding groove (13) is opened on the vertical end. A connecting rod (6) is slidably arranged in the sliding groove (13). And one end of the connecting rod (6) is fixed to one side of the mounting seat (4). A lead screw (17) is rotatably arranged in the sliding groove (13). And the lead screw (17) passes through the connecting rod (6) and is threadedly connected to it. The upper end of the lead screw (17) passes through the upper part of the vertical end and is fixed with a handwheel (8).

4. An automobile camshaft end face grinding device according to claim 3, characterized in that, Guide rods (16) are fixed to both sides of the vertical end, and both guide rods (16) penetrate through the connecting rod (6) and are slidably connected thereto.

5. The end face grinding device for an automobile camshaft according to claim 1, characterized in that, An arc-shaped guide rail (7) is fixed to one side of the vertical end through a bracket. A guide pin (19) is fixed to the upper part of the mounting rod (10), and the upper end of the guide pin (19) is slidably arranged in the arc-shaped guide rail (7).

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