Grinding machine automatic chuck

Abstract

This invention discloses an automatic chuck for a grinding machine, comprising a clamping hub and a holding hub. The clamping hub and the holding hub are arranged with their openings facing each other. One end of the clamping hub is hinged to one end of the holding hub, and the other end of the holding hub has a protruding mounting shaft with a receiving groove. Sliding grooves are formed on both sides of the receiving groove. A cam lever has a cam at its front end, with a first pin hole on it. The cam is placed in the receiving groove. A second positioning pin passes through the sliding groove and the first pin hole of the cam, and its two ends are movably connected to the other end of the clamping hub. Under the action of the cam, the second positioning pin can slide along the sliding groove, thereby adjusting the size of the clamping hole formed by the clamping hub and the holding hub. Two adjusting clamping screws are threaded onto both the clamping hub and the holding hub. The adjusting clamping screws pass through the clamping hub or the holding hub and extend into the clamping hole formed by the clamping hub and the holding hub. This invention clamps the outer circle of shaft-type parts through cam action, resulting in a simple structure and easy operation.

Description

Technical Field

[0001] This invention relates to an automatic chuck for grinding machines. Background Technology

[0002] When grinding shaft-type parts on a cylindrical grinding machine, the shaft-type parts are generally positioned using the center holes at both ends. The outer diameter of the part is clamped using a chuck and fixed to the spindle of the cylindrical grinding machine. The shaft-type parts are rotated by a lever to perform the grinding process. The chuck is clamped by bolts, which is inefficient, prone to slippage, and not very safe. Summary of the Invention

[0003] To solve the above-mentioned technical problems, the present invention provides an automatic grinding machine chuck with a simple structure and high safety.

[0004] The technical solution of this invention to solve the above-mentioned technical problems is as follows: an automatic chuck for a grinding machine, comprising a semi-circular clamping hub, a semi-circular clamping hub, and a cam lever. The clamping hub and the clamping hub are arranged with their openings facing each other. One end of the clamping hub and one end of the clamping hub are hinged together by a first positioning pin. The other end of the clamping hub is provided with a mounting shaft. A receiving groove is opened on the mounting shaft. Sliding grooves are opened on both sides of the groove wall. The front end of the cam lever is a cam. A first pin hole is opened on the cam. The cam is placed in the receiving groove. The middle part of the second positioning pin passes through the sliding groove and the first pin hole of the cam. The two ends of the second positioning pin are movably connected to the other end of the clamping hub. Under the action of the cam, the second positioning pin can slide along the sliding groove, thereby adjusting the size of the clamping hole formed by the clamping hub and the clamping hub. Two adjusting clamping screws are threadedly connected to both the clamping hub and the clamping hub. The adjusting clamping screws pass through the clamping hub or the clamping hub and extend into the clamping hole formed by the clamping hub and the clamping hub.

[0005] The aforementioned automatic chuck for grinding machines has two parallel mounting arms extending outward from the other end of the clamping hub. The mounting shaft at the other end of the clamping hub is inserted between the two mounting arms and connected by a second locating pin.

[0006] The automatic chuck of the above-mentioned grinding machine has a rubber pad on the inner end of the adjusting and clamping screw.

[0007] In the aforementioned automatic chuck for grinding machines, the direction of the cam lever pressing is the same as the direction of the force applied by the lever on the gear grinding machine.

[0008] The beneficial effects of this invention are as follows: This invention uses a cam to clamp the outer circle of a shaft-like part. When the cam rotates to its minimum radius, it is in a loose state, and the adjusting clamping screws are not in contact with the outer circle of the shaft-like part. When the cam lever is moved, and the cam rotates to its maximum radius, the four adjusting clamping screws contact and clamp the outer circle of the shaft-like part. This invention has a simple structure and is easy to operate. Attached Figure Description

[0009] Figure 1This is a schematic diagram of the structure of the present invention in the released state.

[0010] Figure 2 This is a schematic diagram of the structure of the present invention in the clamped state.

[0011] Figure 3 This is a schematic diagram of the clamping hub.

[0012] Figure 4 This is a schematic diagram of the clamping hub structure.

[0013] Figure 5 This is a schematic diagram of the cam lever.

[0014] Figure 6 This is a schematic diagram of the adjusting clamping screw. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] like Figures 1-5 As shown, an automatic grinding machine chuck includes a semi-circular clamping hub 1, a semi-circular clamping hub 2, and a cam lever 3. The clamping hub 1 and the clamping hub 2 are arranged with their openings facing each other. One end of the clamping hub 1 and one end of the clamping hub 2 are hinged together by a first positioning pin 4. The other end of the clamping hub 2 is provided with a mounting shaft 5. The mounting shaft 5 has a receiving groove 6, and sliding grooves 7 are formed on both sides of the groove wall. The front end of the cam lever 3 is a cam 8, and the cam 8 has a first pin hole 9. The cam 8 is placed in the receiving groove 6. The second positioning pin 10 passes through the first pin hole 9 of the slide groove 7 and the cam 8 in the middle. The two ends of the second positioning pin 10 are movably connected to the other end of the clamping hub 1. Under the action of the cam 8, the second positioning pin 10 can slide along the slide groove 7, thereby adjusting the size of the clamping hole formed by the clamping hub 1 and the clamping hub 2. Two adjusting clamping screws 11 are threaded on both the clamping hub 1 and the clamping hub 2. The adjusting clamping screws 11 pass through the clamping hub 1 or the clamping hub 2 and extend into the clamping hole formed by the clamping hub 1 and the clamping hub 2.

[0017] When the cam lever 3 is rotated, the clamping hub 1 and the holding hub 2 are tightened, and then the outer diameter of the shaft part is clamped by the adjusting clamping screw 11. At this time, the machine tool lever rotates clockwise to drive the shaft part 14 to rotate for grinding.

[0018] Two parallel mounting arms 12 extend outward from the other end of the clamping hub 1. The mounting shaft 5 at the other end of the clamping hub 2 is inserted between the two mounting arms 12 and connected by the second locating pin 10.

[0019] like Figure 6 As shown, the inner end of the adjusting clamping screw 11 is provided with a rubber pad 13 with a large coefficient of friction to ensure sufficient friction to drive the shaft part 14 to rotate for grinding, while avoiding damage to the surface quality of the shaft part 14.

[0020] When using it, pay attention to the direction of the cam lever 3 pressing. The direction of the cam lever 3 pressing is the same as the direction of the force applied by the gear grinding machine lever to avoid quality problems caused by pressure relief during processing.

[0021] The working principle of this invention is as follows: This invention uses cam 8 to clamp the outer circle of the shaft part 14. During use, the shaft part 14 is placed into the clamping hole formed by the clamping hub 1 and the clamping hub 2. After a trial clamping, the extension length of the adjusting clamping screw 11 is adjusted. When cam 8 rotates to its minimum radius (e.g., ...), ... Figure 1 As shown), in the loosened state, the adjusting clamping screw 11 is not in contact with the outer circle of the shaft part 14, and the distance is s; when the cam lever 3 is moved, and the cam 8 rotates to its maximum radius (as shown), the cam lever 3 is moved. Figure 2 As shown), the four adjusting clamping screws 11 contact and clamp the outer circle of the shaft part 14.

Claims

1. An automatic chuck for a grinding machine, characterized in that: The device includes a semi-circular clamping hub, a semi-circular clamping hub, and a cam lever. The clamping hub and the clamping hub are positioned with their openings facing each other. One end of the clamping hub and one end of the clamping hub are hinged together by a first positioning pin. The other end of the clamping hub has a protruding mounting shaft with a receiving groove. Sliding grooves are formed on both sides of the receiving groove. The front end of the cam lever is a cam with a first pin hole. The cam is placed in the receiving groove. The middle part of the second positioning pin passes through the sliding groove and the first pin hole of the cam. The two ends of the second positioning pin are movably connected to the other end of the clamping hub. Under the action of the cam, the second positioning pin can slide along the sliding groove, thereby adjusting the size of the clamping hole formed by the clamping hub and the clamping hub. Two adjusting clamping screws are threadedly connected to both the clamping hub and the clamping hub. The adjusting clamping screws extend into the clamping hole formed by the clamping hub and the clamping hub. When the cam rotates to its minimum radius, it is in the loose state, and the adjusting clamping screws are not in contact with the outer circle of the shaft part; when the cam lever is moved, when the cam rotates to its maximum radius, the four adjusting clamping screws contact and clamp with the outer circle of the shaft part.

2. The automatic grinding machine chuck according to claim 1, characterized in that: Two parallel mounting arms extend outward from the other end of the clamping hub. The mounting shaft at the other end of the clamping hub is inserted between the two mounting arms and connected by a second locating pin.

3. The automatic grinding machine chuck according to claim 1, characterized in that: A rubber pad is provided on the inner end of the adjusting and tightening screw.

4. The automatic grinding machine chuck according to claim 1, characterized in that: The direction of the cam lever pressing is the same as the direction of the force applied by the gear grinding machine lever.

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