Workpiece clamping and fixing device for numerical control machine tool machining

Abstract

The utility model relates to the technical field of numerical control machine tool clamps, in particular to a numerical control machine tool machining workpiece clamping and fixing device which comprises a shell, a clamping assembly is arranged at the top of the interior of the shell, an inner supporting assembly is arranged in the middle of the inner side of the shell, and a discharging opening is formed in the bottom face of the shell. The clamping device has the beneficial effects that the worm, the worm gear, the first rotating shaft, the gear ring and the main gear are matched with one another to finally drive the three clamping jaws to simultaneously rotate to be close to or far away from one another to fixedly clamp a middle workpiece, and when the workpiece with the cambered side face is clamped, clamping strips on the inner sides of the clamping jaws are matched with first springs to be attached to the side face of the workpiece, so that the clamping effect is good. The contact area of the clamping jaw and the workpiece is increased, the clamping jaw can clamp the arc-shaped or circular workpiece more stably, an inner supporting block in the inner supporting assembly is far away from a lifting column to be opened, so that the inner ring wall of the workpiece is internally supported, the clamping jaw can be loosened at the moment, and the machine tool machines and grinds the outer side of the workpiece without being hindered by the clamping jaw.

Description

Technical Field

[0001] The utility model relates to the technical field of CNC machine tool clamps, in particular to a CNC machine tool processing workpiece clamping device. Background Art

[0002] A CNC machine tool is an automated machine tool equipped with a program control system. It can operate and process parts according to a pre-programmed program. During the processing of parts, the CNC machine tool needs to clamp and fix the parts. Under the existing technology, there are many kinds of parts processed by machine tools, among which circular and annular parts account for a high proportion. However, the side of the workpiece is clamped by a workpiece clamping device, which makes it inconvenient for the machine tool to process the side of the workpiece. Therefore, we have introduced a workpiece clamping device for CNC machine tools.

[0003] The following problems exist in the prior art: 1. After the existing workpiece clamping device fixes the workpiece, it is processed by the machine tool, but during processing, the side of the workpiece cannot be processed due to the obstruction of the clamping device; 2. The existing CNC machine tools mainly clamp the workpiece by side clamps, but when clamping a circular workpiece or a workpiece with an arc-shaped side, the clamping jaws and the workpiece are usually in point contact, and the clamping is not stable enough to perform processing. Utility Model Content

[0004] The purpose of the utility model is to provide a workpiece clamping device for CNC machine tools to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a CNC machine tool workpiece clamping device, comprising a shell, a clamping assembly is provided at the inner top of the shell, an inner support assembly is provided at the inner middle part of the shell, a feed opening is opened on the bottom surface of the shell, and a support frame is fixedly connected between the inner walls of the feed opening.

[0006] Preferably, the clamping assembly includes a rocker rotatably connected to one side of the housing, one end of the rocker extends to the inside of the housing and is fixedly connected to one end of a worm, and one side of the worm is meshed with a worm wheel.

[0007] Preferably, a first rotating shaft passes through the middle of the worm gear, the top of the first rotating shaft is fixedly connected to a main gear, a gear ring is meshed on one side of the main gear, the top of the gear ring is rotatably connected to the inner top of the outer shell, and the bottom end of the first rotating shaft is rotatably connected to the inner bottom of the outer shell.

[0008] Preferably, three sub-gears are meshed on the side of the gear ring, and the middle of the top surfaces of the three sub-gears are fixedly connected to a second rotating shaft, the top end of the second rotating shaft extends to the outside of the outer shell and is fixedly connected to one end of the clamp, and the second rotating shaft and the outer shell are rotatably connected.

[0009] Preferably, a plurality of holes are opened on one side of the clamping jaw, a first spring is fixedly connected to the inside of each of the holes, one end of the first spring is fixedly connected to a clamping strip via a connecting block, and an elastic structure is formed between the clamping strip and the clamping jaw via the first spring.

[0010] Preferably, the inner support assembly includes an electric telescopic rod fixedly connected to the top surface of the support frame, the output end of the electric telescopic rod is fixedly connected to a moving plate, the top of the moving plate is fixedly connected to one end of the second spring, and the other end of the second spring is fixedly connected to a fixed plate.

[0011] Preferably, three first connecting rods are hinged on the bottom surface of the fixed plate, and the three first connecting rods are hinged on one end away from the fixed plate to an inner support block, and the inner support block is hinged on the side close to the first connecting rod to a second connecting rod, and the second connecting rod is hinged between one end away from the inner support block and the top surface of the movable plate.

[0012] Preferably, a lifting column is fixedly connected to the middle of the bottom surface of the fixed plate, the bottom end of the lifting column is fixedly connected to a limit rod, the outer side of the lifting column is slidably connected to the movable plate, and an elastic structure is formed between the movable plate and the fixed plate through a second spring.

[0013] Preferably, the output end of the electric telescopic rod is connected to the bottom surface of the moving piece through two connecting columns, and the two ends of the limit rod extend out from the gap between the two connecting columns.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The utility model provides a workpiece clamping device for CNC machine tools, which drives the worm wheel to rotate through the worm screw through the clamping assembly, and the worm wheel drives the main gear to rotate through the first rotating shaft, and the main gear finally drives the three sub-gears to rotate through the gear ring, and finally drives the three clamping jaws to rotate simultaneously, so that the three clamping jaws are simultaneously close to or away from each other to clamp the middle workpiece, and when clamping the workpiece with an arc surface on the side surface, the clamping strip on the inner side of the clamping jaw cooperates with the first spring to fit on the side surface of the workpiece, thereby increasing the contact area between the clamping jaw and the workpiece, so that the clamping jaw can clamp the arc or circular workpiece more firmly, and the two groups of connecting rods are brought close to each other through the inner support assembly. At this time, the inner support blocks at the far ends of the two groups of connecting rods will open away from the lifting column, thereby internally supporting the inner circle wall of the workpiece, and the clamping jaws can be loosened at this time, so that the machine tool can process and grind the outer side of the workpiece without being hindered by the clamping jaws. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0017] Figure 2This is a schematic diagram of the front cross-sectional structure of the utility model;

[0018] Figure 3 This is a schematic diagram of the top view of the clamping assembly of the utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the clamping assembly of the utility model when viewed from above;

[0020] Figure 5 This is a schematic diagram of the cross-sectional structure of the clamping jaw of the utility model from top view;

[0021] Figure 6 This is a schematic diagram of the main structure of the inner support component of the utility model.

[0022] In the figure: 1. shell; 2. clamping assembly; 201. rocker; 202. worm; 203. worm wheel; 204. first rotating shaft; 205. main gear; 206. ring gear; 207. sub-gear; 208. second rotating shaft; 209. clamping claw; 2010. hole; 2011. first spring; 2012. clamping strip; 3. inner support assembly; 301. electric telescopic rod; 302. moving plate; 303. second spring; 304. fixed plate; 305. first connecting rod; 306. inner support block; 307. second connecting rod; 308. lifting column; 309. limit rod; 4. discharge port; 5. support frame. DETAILED DESCRIPTION

[0023] In order to make the purpose and technical solution of the utility model clearly and completely described, and the advantages more clearly understood, the embodiments of the utility model are further described in detail in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are part of the embodiments of the utility model, not all of the embodiments, and are only used to explain the embodiments of the utility model, and are not used to limit the embodiments of the utility model. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Embodiment 1

[0024] See also Figures 1 to 6The utility model provides a technical solution: a workpiece clamping device for CNC machine tools, comprising a shell 1, a clamping assembly 2 is provided at the top of the inner part of the shell 1, an inner support assembly 3 is provided at the middle part of the inner side of the shell 1, a feeding port 4 is provided on the bottom surface of the shell 1, a support frame 5 is fixedly connected between the inner walls of the feeding port 4, the clamping assembly 2 comprises a rocker 201 rotatably connected to one side of the shell 1, one end of the rocker 201 extends to the inside of the shell 1 and is fixedly connected to one end of a worm 202, one side of the worm 202 is meshed with a worm wheel 203, and the worm wheel A first rotating shaft 204 runs through the middle of 203, a main gear 205 is fixedly connected to the top of the first rotating shaft 204, a gear ring 206 is meshed on one side of the main gear 205, the top of the gear ring 206 is rotatably connected to the inner top of the housing 1, the bottom of the first rotating shaft 204 is rotatably connected to the inner bottom of the housing 1, three sub-gears 207 are meshed on the side of the gear ring 206, the middle of the top surface of the three sub-gears 207 are fixedly connected to the second rotating shaft 208, the top of the second rotating shaft 208 extends to the outer side of the housing 1 and the clamping claw 209 The second rotating shaft 208 is rotatably connected to the housing 1, and a plurality of holes 2010 are provided on one side of the clamping jaw 209. The first spring 2011 is fixedly connected to one end of the first spring 2011 through a connecting block. The clamping strip 2012 and the clamping jaw 209 are elastically connected through the first spring 2011. The clamping assembly 2 drives the worm wheel 203 to rotate through the worm 202, and the worm wheel 203 drives the worm wheel 203 through the first rotating shaft 204. The main gear 205 rotates, and the main gear 205 eventually drives the three sub-gears 207 to rotate through the ring gear 206, and finally drives the three clamping jaws 209 to rotate at the same time, so that the three clamping jaws 209 are simultaneously close to or away from each other to clamp the middle workpiece, and when clamping the workpiece with an arc surface on the side, the clamping strip 2012 on the inner side of the clamping jaw 209 cooperates with the first spring 2011 to fit on the side of the workpiece, thereby increasing the contact area between the clamping jaw 209 and the workpiece, so that the clamping jaw 209 can clamp the arc or circular workpiece more firmly. Embodiment 2

[0025] On the basis of embodiment 1, in order to achieve the purpose of processing the side of the workpiece without being hindered by the clamping claw 209, the internal support component 3 includes an electric telescopic rod 301 fixedly connected to the top surface of the support frame 5, the output end of the electric telescopic rod 301 is fixedly connected to a moving plate 302, the top of the moving plate 302 is fixedly connected to one end of the second spring 303, and the other end of the second spring 303 is fixedly connected to a fixed plate 304, the bottom surface of the fixed plate 304 is respectively hinged with three first connecting rods 305, the three first connecting rods 305 are hinged to an internal support block 306 at one end away from the fixed plate 304, the side of the internal support block 306 close to the first connecting rod 305 is hinged to a second connecting rod 307, the end of the second connecting rod 307 away from the internal support block 306 is hinged to the top surface of the moving plate 302, the middle part of the bottom surface of the fixed plate 304 is fixedly connected to a lifting column 308, the bottom end of the lifting column 308 is fixedly connected to a limiting rod 309, the outer side of the lifting column 308 is connected to the moving plate 302 The two ends of the limit rod 309 extend out from the gap between the two connecting columns; the movable sheet 302 is pushed upward by the electric telescopic rod 301, so that the entire lifting column 308 rises out of the top opening of the shell 1. Because the length of the limit rod 309 is greater than the opening diameter of the top of the shell 1, the limit rod 309 will be stuck in the shell 1 when it rises to a certain height. After that, the electric telescopic rod 301 continues to push the movable sheet 302 to rise and squeeze the second spring 303, so that the two sets of connecting rods approach each other. At this time, the inner support blocks 306 at the far ends of the two sets of connecting rods will open away from the lifting column 308, thereby supporting the inner wall of the workpiece. At this time, the clamp 209 can be loosened, so that the machine tool can process and grind the outer side of the workpiece without being hindered by the clamp 209.

[0026] In actual use, the worm 202 is driven to rotate by rotating the rocker 201. When the worm 202 rotates, it drives the worm wheel 203 meshing therewith to rotate. The worm wheel 203 drives the main gear 205 to rotate through the first rotating shaft 204. The main gear 205 drives the ring gear 206 to rotate. When the ring gear 206 rotates, it drives the three sub-gears 207 to rotate at the same time. The sub-gear 207 drives the three clamping jaws 209 to rotate at the same time through the second rotating shaft 208, so that the three groups of clamping jaws 209 are simultaneously close to or away from each other, thereby clamping the workpiece in the middle. When clamping a workpiece with an arc surface on the side, the clamping strip 2012 on the inner side of the clamping jaw 209 cooperates with the first spring 2011 to fit on the side of the workpiece, thereby increasing the contact area between the clamping jaw 209 and the workpiece, so that the clamping jaw 209 can be clamped. The claw 209 can clamp the arc or circular workpiece more firmly. When the outer side of the workpiece is processed, the electric telescopic rod 301 pushes the moving piece 302 upward, so that the entire lifting column 308 rises from the top opening of the shell 1. Because the length of the limit rod 309 is greater than the opening diameter of the top of the shell 1, the limit rod 309 will be stuck in the shell 1 when it rises to a certain height. Then the electric telescopic rod 301 continues to push the moving piece 302 to rise and squeeze the second spring 303, so that the two sets of connecting rods approach each other. At this time, the inner support blocks 306 at the far ends of the two sets of connecting rods will open away from the lifting column 308, thereby supporting the inner wall of the workpiece. At this time, the clamping jaws 209 can be loosened, so that the machine tool can process and grind the outer side of the workpiece without being hindered by the clamping jaws 209.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A workpiece clamping device for a CNC machine tool, comprising a housing (1), characterized in that: A clamping assembly (2) is provided at the top of the inner part of the shell (1), an inner support assembly (3) is provided at the middle of the inner side of the shell (1), a feed opening (4) is provided at the bottom surface of the shell (1), and a support frame (5) is fixedly connected between the inner walls of the feed opening (4).

2. A workpiece clamping device for CNC machine tools according to claim 1, characterized in that: The clamping assembly (2) comprises a rocker (201) rotatably connected to one side of the housing (1), one end of the rocker (201) extending into the interior of the housing (1) and fixedly connected to one end of a worm (202), one side of the worm (202) being meshed with a worm wheel (203).

3. A workpiece clamping device for CNC machine tools according to claim 2, characterized in that: A first rotating shaft (204) passes through the middle of the worm wheel (203); a main gear (205) is fixedly connected to the top of the first rotating shaft (204); a gear ring (206) is meshed with one side of the main gear (205); the top of the gear ring (206) is rotatably connected to the inner top of the housing (1); and the bottom of the first rotating shaft (204) is rotatably connected to the inner bottom of the housing (1).

4. A workpiece clamping device for CNC machine tools according to claim 3, characterized in that: The side surface of the gear ring (206) is meshed with three pinion gears (207); the middle of the top surfaces of the three pinion gears (207) are fixedly connected to a second rotating shaft (208); the top end of the second rotating shaft (208) extends to the outside of the housing (1) and is fixedly connected to one end of the clamping claw (209); the second rotating shaft (208) and the housing (1) are rotatably connected.

5. A workpiece clamping device for CNC machine tools according to claim 4, characterized in that: A plurality of holes (2010) are provided on one side of the clamping jaw (209), the interiors of the plurality of holes (2010) are fixedly connected to a first spring (211), one end of the first spring (2011) is fixedly connected to a clamping strip (2012) via a connecting block, and an elastic structure is formed between the clamping strip (2012) and the clamping jaw (209) via the first spring (2011).

6. The workpiece clamping device for CNC machine tool processing according to claim 1, characterized in that: The inner support assembly (3) comprises an electric telescopic rod (301) fixedly connected to the top surface of the support frame (5); the output end of the electric telescopic rod (301) is fixedly connected to a moving plate (302); the top of the moving plate (302) is fixedly connected to one end of a second spring (303); and the other end of the second spring (303) is fixedly connected to a fixing plate (304).

7. A workpiece clamping device for CNC machine tools according to claim 6, characterized in that: The bottom surface of the fixed plate (304) is respectively hinged with three first connecting rods (305); one end of the three first connecting rods (305) away from the fixed plate (304) is hinged with an inner support block (306); a second connecting rod (307) is hinged on a side of the inner support block (306) close to the first connecting rod (305); and one end of the second connecting rod (307) away from the inner support block (306) is hinged to the top surface of the movable plate (302).

8. The workpiece clamping device for CNC machine tool processing according to claim 6, characterized in that: A lifting column (308) is fixedly connected to the middle of the bottom surface of the fixed plate (304), a limit rod (309) is fixedly connected to the bottom end of the lifting column (308), the outer side of the lifting column (308) is slidably connected to the movable plate (302), and an elastic structure is formed between the movable plate (302) and the fixed plate (304) via a second spring (303).

9. A workpiece clamping device for CNC machine tools according to claim 8, characterized in that: The output end of the electric telescopic rod (301) is connected to the bottom surface of the moving plate (302) via two connecting columns, and the two ends of the limit rod (309) extend out from the gap between the two connecting columns.

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