Grinding area pressing plate mechanism of centerless grinding machine

Abstract

The utility model relates to a pressing plate mechanism for a grinding area of a centerless grinding machine. The pressing plate mechanism comprises a bracket, supporting rods are arranged at the two ends of the bracket respectively, fixing plates are arranged at the upper ends of the supporting rods respectively, pressing assemblies are arranged on the fixing plates respectively, and a pressing plate is arranged between the two pressing assemblies. The clamping device is simple in structure, the connecting plate has downward pre-tightening force through the spring between the pressing block and the limiting ring, so that the pressing plate presses a workpiece, the pressing plate can jump up and down within a certain range, machining of the workpiece is not affected while the workpiece is pressed, and the machining efficiency is improved by replacing the pressing blocks with different thicknesses. The magnitude of the pre-tightening force can be changed so as to be suitable for machining of different workpieces; and the guide rod enables the connecting plate to only move vertically, so that the condition that the pressing plate inclines when the workpiece jumps can be prevented.

Description

Technical Field

[0001] The utility model belongs to the technical field of tooling fixtures and relates to a grinding zone pressing plate mechanism of a centerless grinder. Background Art

[0002] When the centerless grinder is grinding parts at high speed or grinding thin and narrow parts, in order to prevent the parts from jumping or tilting and ensuring the safety of the grinding area, a full-length pressing plate is often installed above the parts being ground in the grinding area. By adjusting the support rod, the distance between the lower end of the pressing plate and the parts being ground is controlled within 1 mm, so that the parts being ground are immediately blocked if they are in a slightly abnormal state, avoiding affecting the grinding accuracy of the parts and causing danger;

[0003] However, when some tiny parts and light parts are ground at high speed, the guide wheel rotates fast and the parts are easily lifted up and jumped by the guide wheel. There are also narrow parts such as bearing rings, which are easy to tilt. The end faces of these parts are tightly attached during grinding. During grinding, the parts are pushed forward by the parts behind and driven by the guide wheel to rotate circumferentially. Since the parts outside the grinding area only move forward but not rotate, there is a speed difference between the parts, and the end faces of the two adjacent parts have relative movement, generating friction. Thin-walled or light parts are easily carried out. There is a small gap between the existing pressure plate and the parts, and the workpiece will jump and be unstable during operation. Summary of the invention

[0004] The purpose of the utility model is to overcome the deficiencies in the prior art, solve the problem of workpiece jumping when the existing pressure plate structure faces tiny parts and light parts or narrow parts such as bearing rings, and provide a pressure plate mechanism for the grinding area of ​​a centerless grinder.

[0005] In order to achieve the above purpose, the following technical solutions are adopted:

[0006] The grinding zone pressure plate mechanism of the centerless grinder comprises a bracket, a support rod, a fixed plate, a clamping assembly and a pressure plate, wherein the two ends of the bracket are respectively provided with support rods, the upper ends of the supporting cross bars are respectively provided with fixed plates, the fixed plates are respectively provided with clamping assemblies, and a pressure plate is provided between the two clamping assemblies;

[0007] The clamping assembly includes a screw rod, a threaded hole is opened on the fixing plate, and the screw rod is screwed into the threaded hole; a connecting plate is arranged at the lower end of the screw rod, a limiting ring is arranged in the middle of the screw rod, a pressure block is arranged on the connecting plate, and a spring is arranged between the pressure block and the limiting ring; a pressure plate seat is arranged under the connecting plate, and a connecting block is arranged under the pressure plate seat, and the two ends of the pressure plate are respectively connected to the two connecting blocks.

[0008] Preferably, guide rods are respectively provided at both ends of the connecting plate, and guide holes capable of cooperating with the guide rods are opened on the fixing plate.

[0009] Preferably, the lower ends of the guide rods are respectively provided with threaded rods, the threaded rods are screwed onto the connecting plates, and the upper ends of the guide rods are connected with limiting nuts after passing through the guide holes.

[0010] Preferably, a locking nut is provided at the lower end of the screw rod, and a plane thrust bearing is provided between the locking nut and the connecting plate.

[0011] Preferably, a rotating handle is provided at the upper end of the screw.

[0012] Preferably, an inclined surface is provided on one side of the pressing plate.

[0013] Compared with the prior art, the utility model has the following advantages:

[0014] The utility model has a simple structure. Through the spring between the pressure block and the limit ring, the connecting plate has a downward pre-tightening force, so that the pressure plate presses the workpiece, and the pressure plate can jump up and down within a certain range, pressing the workpiece without affecting the processing of the workpiece. By replacing pressure blocks of different thicknesses, the size of the pre-tightening force can also be changed to suit the processing of different workpieces; the guide rod enables the connecting plate to move straight up and down, which can prevent the pressure plate from tilting when the workpiece jumps. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a main schematic diagram of the utility model.

[0016] Figure 2 It is a left side schematic diagram of the utility model.

[0017] In the figure: 1. bracket; 2. support rod; 3. fixing plate; 4. clamping assembly; 5. pressure plate; 6. screw rod; 7. threaded hole; 8. connecting plate; 9. limiting ring; 10. pressure block; 11. spring; 12. pressure plate seat; 13. connecting block; 14. guide rod; 15. guide hole; 16. threaded rod; 17. limiting nut; 18. locking nut; 19. plane thrust bearing; 20. rotating handle; 21. inclined surface. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0019] like Figure 1-Figure 2As shown, a centerless grinder grinding zone pressure plate mechanism comprises a bracket 1, a support rod 2, a fixed plate 3, a clamping assembly 4 and a pressure plate 5, wherein the two ends of the bracket 1 are respectively provided with support rods 2, the upper ends of the supporting cross bars are respectively provided with fixed plates 3, the fixed plates 3 are respectively provided with clamping assemblies 4, a pressure plate 5 is provided between the two clamping assemblies 4, the pressure plate 5 is used to press the workpiece, and the clamping assembly 4 makes the pressure plate 5 work more stably;

[0020] The clamping assembly 4 includes a screw rod 6. A threaded hole 7 is formed on the fixing plate 3. The screw rod 6 is screwed into the threaded hole 7. The screw rod 6 can move up and down in the threaded hole 7.

[0021] A connecting plate 8 is provided at the lower end of the screw rod 6, a limiting ring 9 is provided in the middle of the screw rod 6, a pressing block 10 is provided on the connecting plate 8, a spring 11 is provided between the pressing block 10 and the limiting ring 9, and the spring 11 applies a downward preload force to the pressing block 10 (i.e., applies a downward preload force to the connecting plate 8). By replacing the pressing block 10 with different thicknesses, the size of the preload force of the spring 11 can also be changed;

[0022] A pressure plate seat 12 is arranged under the connecting plate 8, and a connecting block 13 is arranged under the pressure plate seat 12. The two ends of the pressure plate 5 are respectively connected to the two connecting blocks 13. The screw 6 rotates to drive the connecting plate 8 to move downward, so that the pressure plate 5 can press the workpiece. At this time, the downward pre-tightening force applied by the spring 11 to the connecting plate 8 makes the pressure plate 5 press the workpiece, and can jump up and down within a certain range, while pressing the workpiece without affecting the processing of the workpiece.

[0023] Furthermore, guide rods 14 are respectively provided at both ends of the connecting plate 8, and guide holes 15 that can cooperate with the guide rods 14 are opened on the fixing plate 3. The cooperation between the guide rods 14 and the guide holes 15 enables the connecting plate 8 to move straight up and down, preventing the pressure plate 5 from tilting when the workpiece jumps.

[0024] Furthermore, the lower end of the guide rod 14 is respectively provided with a threaded rod 16, which is screwed to the connecting plate 8, and the upper end of the guide rod 14 passes through the guide hole 15 and is connected with a limiting nut 17, which prevents the guide rod 14 from escaping from the guide hole 15.

[0025] Furthermore, a locking nut 18 is provided at the lower end of the screw rod 6, and a planar thrust bearing 19 is provided between the locking nut 18 and the connecting plate 8. The planar thrust bearing 19 prevents friction from occurring between the locking nut 18 and the connecting plate 8 when the screw rod 6 rotates, thereby preventing the locking nut 18 from falling off.

[0026] Furthermore, a rotating handle 20 is provided at the upper end of the screw rod 6 , and a worker can rotate the screw rod 6 more conveniently by rotating the handle 20 .

[0027] Furthermore, an inclined surface 21 is provided on one side of the pressing plate 5 , and the inclined surface 21 reduces the contact area between the pressing plate 5 and the workpiece, thereby reducing friction.

[0028] Working principle: The utility model arranges a limit ring 9 on the screw rod, and a spring 11 between the pressure block 10 and the limit ring 9, so that the spring 11 applies a downward pre-tightening force to the pressure block 10 (that is, applies a downward pre-tightening force to the connecting plate 8), so that the pressure plate 5 presses the workpiece with the pre-tightening force of the spring 11, and can jump up and down within a certain range, pressing the workpiece without affecting the processing of the workpiece. By replacing pressure blocks 10 of different thicknesses, the size of the pre-tightening force of the spring 11 can also be changed; by using two guide rods 14, the connecting plate 8 can be moved straight up and down, which can prevent the pressure plate 5 from tilting when the workpiece jumps.

[0029] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A grinding zone pressure plate mechanism of a centerless grinder, comprising a bracket (1), a support rod (2), a fixing plate (3), a pressing assembly (4) and a pressure plate (5), wherein: The two ends of the bracket (1) are respectively provided with support rods (2), the upper ends of the supporting cross rods are respectively provided with fixing plates (3), the fixing plates (3) are respectively provided with clamping assemblies (4), and a pressing plate (5) is provided between the two clamping assemblies (4); The clamping assembly (4) comprises a screw rod (6), a threaded hole (7) is formed on the fixing plate (3), and the screw rod (6) is screwed into the threaded hole (7); a connecting plate (8) is provided at the lower end of the screw rod (6), a limiting ring (9) is provided in the middle of the screw rod (6), a pressure block (10) is provided on the connecting plate (8), and a spring (11) is provided between the pressure block (10) and the limiting ring (9); a pressure plate seat (12) is provided below the connecting plate (8), and a connecting block (13) is provided below the pressure plate seat (12), and the two ends of the pressure plate (5) are respectively connected to the two connecting blocks (13).

2. The grinding zone pressure plate mechanism of a centerless grinder according to claim 1, characterized in that: Guide rods (14) are respectively provided at both ends of the connecting plate (8), and guide holes (15) capable of matching with the guide rods (14) are provided on the fixing plate (3).

3. The grinding zone pressure plate mechanism of a centerless grinder according to claim 2, characterized in that: The lower ends of the guide rods (14) are respectively provided with threaded rods (16), the threaded rods (16) are screwed onto the connecting plate (8), and the upper ends of the guide rods (14) pass through the guide holes (15) and are connected to the limiting nuts (17).

4. The grinding zone pressure plate mechanism of a centerless grinder according to claim 1, characterized in that: A locking nut (18) is provided at the lower end of the screw rod (6), and a plane thrust bearing (19) is provided between the locking nut (18) and the connecting plate (8).

5. The grinding zone pressure plate mechanism of a centerless grinder according to claim 1, characterized in that: A rotating handle (20) is provided at the upper end of the screw rod (6).

6. The grinding zone pressure plate mechanism of a centerless grinder according to claim 1, characterized in that: An inclined surface (21) is provided on one side of the pressing plate (5).

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