CN203831216U - Wear-resistant structure in polishing machine tensioning device - Google Patents

Abstract

The utility model provides a wear-resistant structure in a polishing machine tensioning device, and belongs to the technical field of machinery, wherein the wear-resistant structure solves the problem that an existing polishing machine is short in service life. The wear-resistant structure comprises a wear-resistant piece fixedly connected to a guide cylinder, wherein a cam abuts against the wear-resistant piece. By means of the wear-resistant structure in the polishing machine tensioning device, the service life of a polishing machine is prolonged, and meanwhile the wear-resistant piece is convenient to replace.

Description

Wear-resistant structure in tensioning device of polishing machine

technical field

The utility model belongs to the technical field of machinery and relates to a polishing machine, in particular to a wear-resistant structure in a tensioning device of the polishing machine.

Background technique

Polishing machines are mainly used for smoothing and deburring of workpieces. When the polishing machine is working, the workpieces collide and rub against each other violently under the action of the polishing belt, and the workpiece is polished with high work efficiency and good processing quality, so it has been widely used in production and processes in many industries .

Existing flat grinding and polishing machines generally have a driving wheel, a driven wheel, a tensioning device and a thrust mechanism, and the tensioning device is used to tighten the polishing belt that is enclosed in the driving wheel and the driven wheel. Simultaneously, after the polishing belt is discarded, the polishing belt can be conveniently replaced by the above-mentioned tensioning device.

The thrust mechanism includes a cam and a handle. The driving wheel and the driven wheel are covered with an annular polishing belt. When the polishing belt needs to be replaced, the operating handle rotates the cam so that the driven wheel is close to the driving wheel. Since the distance between the driven wheel and the driving wheel is reduced, the polishing belt can be easily removed and replaced with a new polishing belt. However, due to relying on the cam directly against the frame and friction relative to its action, it is easy to cause excessive wear and tear on the frame after a long time, and it is not easy to repair after wear and tear, thereby affecting the service life of the polishing machine.

Contents of the invention

The purpose of the utility model is to provide a wear-resistant structure in the tensioning device of the polishing machine which can prolong the service life of the polishing machine in view of the above-mentioned problems existing in the prior art.

The purpose of the utility model can be achieved through the following technical solutions: a wear-resistant structure in the tensioning device of the polishing machine, the tensioning device of the polishing machine includes a guide cylinder and a connecting rod, the guide cylinder is fixedly connected on the polishing machine frame, The above-mentioned connecting rod is located in the guide cylinder and the connecting rod can translate along the guide cylinder. The outer end of the above-mentioned connecting rod is used to connect with the driven wheel of the polishing machine. The inner end of the above-mentioned connecting rod is hinged with a cam. The outer end of the connecting rod and the The inner ends are all located outside the guide cylinder, and a spring is provided between the outer end of the connecting rod and the guide cylinder, and the cam abuts against the end of the guide cylinder under the elastic force of the spring. On the wear plate, the above-mentioned cam leans against the wear plate.

The driving wheel is rotatably fixed on the frame of the polishing machine, the driven wheel is connected to the outer end of the connecting rod, and the driven wheel can be away from or close to the driving wheel through the tensioning device.

The connecting rod is passed through the guide cylinder, so it can slide back and forth in the guide cylinder, because the guide cylinder is cylindrical, and the connecting rod matches the guide cylinder. Therefore, under the guidance of the guide cylinder, the connecting rod can reciprocate and slide in translation along the axial direction of the guide cylinder.

The cam is hinged on the connecting rod, and a handle is fixedly connected to the cam. Therefore, pulling the handle can make the cam rotate relative to the connecting rod.

When the polishing belt needs to be replaced, the handle is pulled to drive the rotation of the cam, so that the convex edge of the cam leans against the wear-resistant sheet to rotate. Under the action of the cam flange, the connecting rod moves relative to the guide cylinder, and the driven wheel connected to the connecting rod approaches the direction of the driving wheel to realize the purpose of loosening the belt.

Here, by arranging wear-resistant plates on the guide cylinder to interact with the cam, on the one hand, the friction torque is increased, and on the other hand, the direct wear and damage caused by the cam to the guide cylinder is reduced. After the wear-resistant sheet is worn, take off the worn-out wear-resistant sheet and replace it with a new wear-resistant sheet, thereby improving the service life of the polishing machine with this structure.

In the above-mentioned wear-resistant structure in the tensioning device of the polishing machine, the wear-resistant sheet is composed of a connecting section and a wear-resistant section, and the connecting section and the wear-resistant section form an L shape, and the connecting section is connected to the guide cylinder. connect. Wherein the connecting section is used to fix the wear-resistant plate on the guide cylinder, and the wear-resistant section is used to be in contact with the cam.

In the above-mentioned wear-resistant structure in the tensioning device of the polishing machine, the guide cylinder has a protruding positioning seat, and the wear-resistant section of the above-mentioned wear-resistant sheet is against the positioning seat.

The wear-resistant sheet is pressed tightly between the positioning seat and the cam, and is blocked by the positioning seat to prevent the wear-resistant sheet from being broken due to the inclined pushing force of the cam.

In the above-mentioned wear-resistant structure in the tensioning device of the polishing machine, the wear-resistant sheet is fixedly connected to the guide cylinder by screws. It is fixed on the guide cylinder by screws to prevent the wear plate from falling off from the guide cylinder. When the wear-resistant sheet needs to be replaced, just remove the screw and the wear-resistant sheet and replace it.

In the above-mentioned wear-resistant structure in the tensioning device of the polishing machine, the above-mentioned wear-resistant sheet is welded on the above-mentioned guide cylinder.

The wear-resistant sheet can be firmly connected to the guide cylinder by welding. Since the wear-resistant sheet and the guide cylinder are made of different materials, the wear-resistant sheet located on the guide cylinder can be easily removed by tools.

In the above-mentioned wear-resistant structure in the tensioning device of the polishing machine, the material of the wear-resistant sheet is white cast iron.

In the above-mentioned wear-resistant structure in the tensioning device of the polishing machine, the material of the wear-resistant sheet is silicon carbide.

Both white cast iron and silicon carbide meninges have high wear resistance. Of course, other common wear-resistant materials that can withstand the extrusion force of the cam can be selected according to actual needs.

Compared with the prior art, the wear-resistant structure in the tensioning device of the polishing machine has a wear-resistant plate fixedly connected to the guide cylinder, and when the polishing belt is to be replaced, the cam rotates relative to the wear-resistant plate, thus avoiding the friction between the cam and the guide cylinder. Directly cause wear damage and prolong the service life of the polishing machine.

At the same time, the worn wear-resistant sheet can be replaced at any time, and the replacement process is convenient and quick.

Description of drawings

Figure 1 is a schematic diagram of the overall structure of the tensioning device of the polishing machine.

Fig. 2 is a schematic cross-sectional structure diagram of a cam and a wear-resistant sheet in the wear-resistant structure of the tensioning device of the polishing machine.

In the figure, 1. Rack; 2. Driving wheel; 3. Driven wheel; 4. Polishing belt; 5. Guide cylinder; 6. Connecting rod; 7. Spring; 8. Cam; 9. Handle; 10. Wear-resistant sheet ; 10a, connecting section; 10b, wear section; 11, screw; 12, positioning seat.

Detailed ways

The following are specific embodiments of the utility model and in conjunction with the accompanying drawings, the technical solution of the utility model is further described, but the utility model is not limited to these embodiments.

As shown in Figure 1, the wear-resistant structure in the tensioning device of the polishing machine is composed of a frame 1, a driving wheel 2, a driven wheel 3, a polishing belt 4 and a tensioning device, and the driving wheel 2 is rotatably fixed on the On the frame 1, the driven wheel 3 is located on the frame 1, the polishing belt 4 is sleeved on the driving wheel 2 and the driven wheel 3, and the tensioning device is arranged between the driven wheel 3 and the frame 1.

The tensioning device includes a guide cylinder 5 and a connecting rod 6, the guide cylinder 5 is fixedly connected on the polishing machine frame 1, the connecting rod 6 is located in the guide cylinder 5 and the connecting rod 6 can translate along the guide cylinder 5. The outer end of connecting rod 6 is used to link with the driven wheel 3 of polishing machine, and the inner end of connecting rod 6 is hinged with cam 8, and the outer end and inner end of connecting rod 6 are all positioned at guide cylinder 5 outsides. A spring 7 is provided between the outer end of the connecting rod 6 and the guide cylinder 5 , and the cam 8 abuts against the end of the guide cylinder 5 under the elastic force of the spring 7 .

The cam 8 is fixedly connected with a handle 9, and pulling the handle 9 can drive the cam 8 to rotate.

As shown in Figure 2, in order to prevent the guide cylinder 5 from being damaged by the friction of the cam 8, a wear-resistant sheet 10 is fixed on the guide cylinder 5, and the wear-resistant sheet 10 can be fixed on the guide cylinder 5 by welding or by screws 11 . The wear-resistant sheet 10 is a steel sheet and is fixedly connected to the guide cylinder 5 by screws 11. According to the actual situation, it is also feasible to use a wear-resistant sheet made of white cast iron or silicon carbide.

Wear-resistant plate 10 is made up of connecting section 10a and wearing-resistant section 10b, and connecting section 10a and wearing-resistant section 10b form an L-shape, connecting section 10a is connected with guide cylinder 5, the wear-resistant sheet 10 after wearing and tearing is convenient to replace like this. In this embodiment, the guide cylinder has a protruding positioning seat, and the wear-resistant section of the wear-resistant plate is against the positioning seat.

Under the elastic force of the spring 7 , the cam 8 abuts against the wear section 10 b of the wear plate 10 of the guide cylinder 5 . Here it is mainly that the flange of the cam 8 abuts against the wear-resistant plate 10 on the guide cylinder 5, the connecting rod 6 moves with the rotation of the cam 8, and the driven wheel 3 connected to the connecting rod 6 faces the direction of the driving wheel 2 Get closer to achieve a loose strap. After the wear-resistant sheet 10 is worn, the worn wear-resistant sheet 10 is taken off and replaced with a new wear-resistant sheet 10, which can be reused repeatedly, so as to prolong the service life of the whole polishing machine.

Claims (7)

1. the abrasion-proof structure in a polishing machine swelling device, polishing machine swelling device comprises a guide cylinder (5) and connecting rod (6), guide cylinder (5) is connected in polishing machine frame (1), above-mentioned connecting rod (6) is arranged in guide cylinder (5) and connecting rod (6) can be along guide cylinder (5) translation, the outer end of above-mentioned connecting rod (6) is for being connected with the driven pulley (3) of polishing machine, the inner of above-mentioned connecting rod (6) is hinged with cam (8), the outer end of described connecting rod (6) and the inner are all positioned at guide cylinder (5) outside, between described connecting rod (6) outer end and guide cylinder (5), be provided with spring (7), under the elastic force effect of spring (7), cam (8) is resisted against guide cylinder (5) end, it is characterized in that, this structure comprises the wear plate (10) being connected on guide cylinder (5), above-mentioned cam (8) is resisted against on wear plate (10).

2. the abrasion-proof structure in polishing machine swelling device according to claim 1, it is characterized in that, described wear plate (10) is made up of linkage section (10a) and wear-resisting section (10b), and linkage section (10a) is L shaped with wear-resisting section (10b) formation one, and described linkage section (10a) is connected with guide cylinder (5).

3. the abrasion-proof structure in polishing machine swelling device according to claim 2, it is characterized in that, on described guide cylinder (5), have the positioning seat (12) of protrusion, wear-resisting section (10b) of above-mentioned wear plate (10) is resisted against positioning seat (12) and locates.

4. the abrasion-proof structure in polishing machine swelling device according to claim 2, is characterized in that, described wear plate (10) is connected on guide cylinder (5) by screw.

5. the abrasion-proof structure in polishing machine swelling device according to claim 2, is characterized in that, described wear plate (10) is welded on above-mentioned guide cylinder (5).

6. the abrasion-proof structure in polishing machine swelling device according to claim 1, is characterized in that, the material of described wear plate (10) is white cast-iron.

7. the abrasion-proof structure in polishing machine swelling device according to claim 1, is characterized in that, the material of described wear plate (10) is carborundum.