Single-point pressurizing device for quantitative grinding machine

Abstract

The utility model relates to the technical field of grinding and polishing machines, in particular to a single-point pressurizing device for a quantitative grinding machine, which comprises a cylinder body hermetically arranged at the bottom of a belt wheel, a plurality of uniformly distributed pressing rods are slidably arranged in the cylinder body, the tops of the pressing rods are bolted with hermetically sliding pistons, and reset springs are arranged between the pressing rods and the pistons; pressure cavities are formed in the tops of the pistons; and the plurality of pressure cavities are communicated with each other and are communicated with an external air source. Compressed gas is introduced into the pressure cavity, under the action of air pressure, the piston pushes the pressing rod to move, the acting force of the pressing rod on a workpiece is adjusted, meanwhile, after grinding is finished, the pressure cavity relieves pressure, the reset spring can reset the pressing rod, and therefore the grinding and polishing quality of the workpiece in the grinding process is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of grinding and polishing machines, in particular to a single-point pressurizing device for a quantitative grinding machine. Background Art

[0002] Grinding and polishing machines are used in many industries. They are often used to prepare metal samples, polymer samples, ceramic samples or similar samples for further experiments, such as metallographic experiments. At present, the structure of a single-point quantitative grinding machine is a central force loading single-point quantitative grinding machine disclosed in Chinese utility model patent CN218488098U, which mainly includes a connecting plate and a grinding motor mounting plate, a workpiece mounting disk and a grinding motor driving the workpiece mounting disk to rotate are arranged on the grinding motor mounting plate; a rotating shaft and two second pulleys are rotatably mounted on the grinding motor mounting plate, and a second synchronous belt is wound around the two second pulleys, wherein the workpiece mounting disk and one second pulley are both mounted on the rotating shaft. When the grinding motor is working, the rotating shaft and the workpiece mounting disk are driven to rotate by the second pulley and the second synchronous belt, the workpiece mounting disk descends, and the lower end face of the workpiece contacts with the rotating grinding disk for grinding, and the grinding disk vertically applies a central force to the workpiece up and down for grinding, and single-point grinding is performed on a grinding disk, and the grinding amount can be quantitatively controlled by the lifting motor, wherein the workpiece is supported by a pressure rod. However, during the grinding and polishing process, the pressure applied by the pressure rod on the workpiece is too large or insufficient, which affects the quality of the grinding and polishing of the workpiece.

[0003] Therefore, it is necessary to improve the above-mentioned existing pressure rod part. Utility Model Content

[0004] The purpose of the utility model is to overcome the defects and shortcomings in the prior art. To this end, the utility model provides a single-point pressurizing device for a quantitative grinding machine, which can adjust the pressure of a pressure rod on a workpiece to ensure the grinding quality of the workpiece.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a single-point pressurizing device for a quantitative grinding machine, comprising a cylinder body sealed and arranged at the bottom of a pulley, a plurality of evenly distributed pressure rods being slidably arranged in the cylinder body, a sealed sliding piston being bolted to the top of the pressure rod, a return spring being arranged between the pressure rod and the piston; a pressure chamber being arranged at the top of the piston; and a plurality of the pressure chambers being interconnected and connected to an external air source.

[0006] Furthermore, a plug is provided on the sliding sleeve of the pressure rod, the plug is bolted to the bottom end of the cylinder body, and the return spring is located between the plug and the piston.

[0007] Furthermore, an annular groove A is provided at the top of the cylinder body, and the annular groove A is communicated with each of the pressure chambers.

[0008] Furthermore, a plurality of buffer chambers are evenly distributed in the cylinder body, and the buffer chambers are communicated with the annular groove A.

[0009] Furthermore, a tube shaft is integrally provided on the top of the pulley, the tube shaft is slidably sleeved on the rotating shaft, and the tube shaft is rotatably arranged in the grinding motor mounting seat; a plurality of ventilation cavities are provided in the tube shaft, and the ventilation cavities are communicated with the pressure chamber; the ventilation cavities are connected with an external air source through the grinding motor mounting seat.

[0010] Furthermore, a floating sleeve is provided between the tube shaft and the grinding motor mounting seat, and the floating sleeve is provided with an air hole connected to the external air source; a plurality of rolling bearings are coaxially provided between the bottom of the floating sleeve and the tube shaft; a cover plate for pressing the floating sleeve is bolted to the top of the tube shaft; an annular groove B corresponding to the position of the air hole is provided on the outer wall of the tube shaft, and a plurality of O-rings are provided above and below the annular groove B, and the O-rings are located between the tube shaft and the floating sleeve.

[0011] Furthermore, an air guide sleeve is provided between the floating sleeve and the grinding motor mounting seat, and an annular groove C corresponding to the position of the air vent is provided on the inner wall of the air guide sleeve, and the annular groove C is communicated with an external air source; the air guide sleeve is bolted to the grinding motor mounting seat; sealing rings A are provided above and below the annular groove C, and the sealing ring A is located between the air guide sleeve and the floating sleeve.

[0012] Furthermore, a sealing gasket is provided between the cylinder body and the pulley; and the cylinder body is bolted to the pulley.

[0013] Compared with the prior art, the utility model has the following beneficial effects: By introducing compressed gas into the pressure chamber, the piston pushes the pressure rod to move under the action of gas pressure, so that the force of the pressure rod on the workpiece can be adjusted. At the same time, after the grinding is completed, the pressure chamber is depressurized and the reset spring can reset the pressure rod. The overall structure is simple and easy to operate, which ensures the grinding and polishing quality of the workpiece during the grinding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model.

[0015] Figure 2 for Figure 1 Axonometric drawing of .

[0016] Figure 3 It is an explosion diagram of the utility model.

[0017] Figure 4 It is a structural schematic diagram of the cylinder body in the utility model.

[0018] Among them: 1. Pulley; 2. Rotating shaft; 3. Tube shaft; 4. Cylinder body; 5. Cylinder body; 6. Floating sleeve; 7. Grinding motor mounting seat; 8. Lubricating bearing; 9. Air guide sleeve; 31. Ventilation chamber; 32. O-ring; 33. Annular groove B; 41. Plug; 42. Return spring; 43. Piston; 44. Pressure chamber; 45. Annular groove A; 46. Buffer chamber; 47. Sealing gasket; 61. Air vent; 91. Annular groove C. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0020] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention. Example

[0021] See also Figures 1 to 4 The utility model provides a single-point pressurizing device for a quantitative grinding machine, including a cylinder body 4 sealed and arranged at the bottom of a pulley 1, a plurality of evenly distributed pressure rods 5 slidingly arranged in the cylinder body 4, a sealed and sliding piston 43 bolted to the top of the pressure rod 5, a return spring 42 arranged between the pressure rod 5 and the piston 43; a pressure chamber 44 is arranged at the top of the piston 43; a plurality of pressure chambers 44 are interconnected and connected to an external air source.

[0022] Preferably, a sealing gasket 47 is provided between the cylinder body 4 and the pulley 1 ; the cylinder body 4 is bolted to the pulley 1 .

[0023] Preferably, a plug 41 is provided on the sliding sleeve of the pressure rod 5 , the plug 41 is bolted to the bottom end of the cylinder body 4 , and the return spring 42 is located between the plug 41 and the piston 43 .

[0024] Preferably, an annular groove A45 is provided at the top of the cylinder body 4 , and the annular groove A45 is communicated with each pressure chamber 44 .

[0025] As an embodiment of the utility model, a plurality of buffer chambers 46 are evenly distributed in the cylinder body 4, and the buffer chambers 46 are communicated with the annular groove A45. Through the buffer chambers 46, the pressure rod 5 can be pushed by the piston 43 to move slowly and uniformly, so as to adjust the pressure of the pressure rod 5 on the workpiece.

[0026] As an embodiment of the utility model, a tube shaft 3 is integrally provided on the top of the pulley 1, and the tube shaft 3 is slidably sleeved on the rotating shaft 2, and the tube shaft 3 is rotatably arranged in the grinding motor mounting seat 7; a plurality of ventilation cavities 31 are provided in the tube shaft 3, and the ventilation cavities 31 are communicated with the pressure chamber 44; the ventilation cavities 31 are connected with the external air source through the grinding motor mounting seat 7.

[0027] Preferably, a floating sleeve 6 is provided between the tube shaft 3 and the grinding motor mounting seat 7, and the floating sleeve 6 is provided with an air hole 61 communicating with the external air source; a plurality of rolling bearings are coaxially provided between the bottom of the floating sleeve 6 and the tube shaft 3; a cover plate for pressing the floating sleeve 6 is bolted to the top of the tube shaft 3; an annular groove B33 corresponding to the position of the air hole 61 is provided on the outer wall of the tube shaft 3, and a plurality of O-rings 32 are provided above and below the annular groove B33, and the O-ring 32 is located between the tube shaft 3 and the floating sleeve 6.

[0028] Preferably, an air guide sleeve 9 is provided between the floating sleeve 6 and the grinding motor mounting seat 7, and an annular groove C91 corresponding to the position of the air vent 61 is provided on the inner wall of the air guide sleeve 9; the air guide sleeve 9 is fastened to the grinding motor mounting seat 7; sealing rings A are provided above and below the annular groove C91, and the sealing ring A is located between the air guide sleeve 9 and the floating sleeve 6, and the annular groove C91 is connected to an external air source.

[0029] As an embodiment of the utility model, a lubricating bearing 8 is provided on the top of the tube shaft 3 , and the lubricating bearing 8 is sleeved on the rotating shaft 2 , and the top of the lubricating bearing 8 is embedded between the cover plate and the tube shaft 3 .

[0030] In addition, the grinding motor on the grinding motor mounting seat 7 rotates the pulley 1 through a belt drive. A guide sleeve is bolted in the cylinder 4 at the bottom of the pulley 1. The guide sleeve is splined with the rotating shaft 2. The top of the rotating shaft 2 is rotatably mounted on the grinding motor mounting seat 7. The bottom of the rotating shaft 2 is hinged to the workpiece mounting plate, so that the pulley 1 drives the rotating shaft 2 to rotate. The details are not repeated here.

[0031] The working process of the utility model is as follows: when the workpiece on the workpiece mounting disk contacts the grinding disk, the external air source is communicated with the annular groove C91 in the air guide sleeve 9 through the air hole of the grinding motor mounting seat 7, so that the pipe shaft 3 and the floating sleeve 6 can always be communicated with the external air source during the rotation process; the compressed gas passes through the air guide sleeve 9, the floating sleeve 6 and the ventilation cavity 31 in turn into one of the pressure chambers 44 and passes through the annular groove A45 and the buffer cavity 46 into the other pressure chambers 44. Under the action of air pressure, the piston 43 pushes the pressure rod 5 to move, so as to adjust the force of the pressure rod 5 on the workpiece. At the same time, after the grinding is completed, the reset spring 42 can reset the pressure rod 5, thereby ensuring the grinding and polishing quality of the workpiece during the grinding process. The overall structure is simple and easy to operate.

[0032] The utility model can be summarized in other specific forms that do not violate the spirit or main features of the utility model. Therefore, no matter from which point of view, the above embodiments of the utility model can only be regarded as an explanation of the utility model and cannot limit the utility model. The claims indicate the scope of the utility model, while the above description does not indicate the scope of the utility model. Therefore, any changes within the meaning and scope equivalent to the claims of the utility model should be considered to be included in the scope of the claims of the utility model.

Claims

1. A single-point pressurizing device for a quantitative grinding machine, characterized in that: The invention comprises a cylinder body (4) which is sealed and arranged at the bottom of a pulley (1); a plurality of uniformly distributed pressure rods (5) are slidably arranged in the cylinder body (4); a sealed and slidable piston (43) is bolted to the top of the pressure rod (5); a return spring (42) is arranged between the pressure rod (5) and the piston (43); a pressure chamber (44) is arranged at the top of the piston (43); and a plurality of the pressure chambers (44) are connected to each other and communicated with an external air source.

2. The single-point pressurizing device for a quantitative grinding machine according to claim 1, characterized in that: A plug (41) is provided on the sliding sleeve of the pressure rod (5), the plug (41) is bolted to the bottom end of the cylinder body (4), and the return spring (42) is located between the plug (41) and the piston (43).

3. The single-point pressurizing device for a quantitative grinding machine according to claim 2, characterized in that: An annular groove A (45) is provided at the top end of the cylinder body (4), and the annular groove A (45) is communicated with each of the pressure chambers (44).

4. The single-point pressurizing device for a quantitative grinding machine according to claim 3, characterized in that: A plurality of buffer chambers (46) are evenly distributed in the cylinder body (4), and the buffer chambers (46) are in communication with the annular groove A (45).

5. The single-point pressurizing device for a quantitative grinding machine according to any one of claims 1 to 4, characterized in that: A tube shaft (3) is integrally provided on the top of the pulley (1), the tube shaft (3) is slidably sleeved on the rotating shaft (2), and the tube shaft (3) is rotatably arranged in a grinding motor mounting seat (7); a plurality of ventilation cavities (31) are provided in the tube shaft (3), and the ventilation cavities (31) are communicated with the pressure chamber (44); the ventilation cavities (31) are communicated with an external air source through the grinding motor mounting seat (7).

6. The single-point pressurizing device for a quantitative grinding machine according to claim 5, characterized in that: A floating sleeve (6) is provided between the tube shaft (3) and the grinding motor mounting seat (7), and an air hole (61) communicating with an external air source is provided on the floating sleeve (6); a plurality of rolling bearings are coaxially provided between the bottom of the floating sleeve (6) and the tube shaft (3); a cover plate for pressing the floating sleeve (6) is bolted to the top of the tube shaft (3); an annular groove B (33) corresponding to the position of the air hole (61) is provided on the outer wall of the tube shaft (3), and a plurality of O-type sealing rings (32) are provided above and below the annular groove B (33), and the O-type sealing ring (32) is located between the tube shaft (3) and the floating sleeve (6).

7. The single-point pressurizing device for a quantitative grinding machine according to claim 6, characterized in that: An air guide sleeve (9) is provided between the floating sleeve (6) and the grinding motor mounting seat (7); an annular groove C (91) corresponding to the position of the air vent (61) is provided on the inner wall of the air guide sleeve (9); the annular groove C (91) is communicated with an external air source; the air guide sleeve (9) is bolted to the grinding motor mounting seat (7); sealing rings A are provided above and below the annular groove C (91); the sealing ring A is located between the air guide sleeve (9) and the floating sleeve (6).

8. The single-point pressurizing device for a quantitative grinding machine according to claim 1, characterized in that: A sealing gasket (47) is provided between the cylinder body (4) and the pulley (1); the cylinder body (4) is bolted to the pulley (1).

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