Adaptive grinding mechanism

Abstract

The present invention discloses an adaptive pressing and grinding mechanism, which is installed on a belt grinding device for pressing the abrasive belt and is arranged transversely relative to a workpiece conveying belt, and includes a fixed plate and a plurality of floating pressing block mechanism units arranged side by side on the fixed plate, such units all include a pressing block and a first and a second elastic guide rod mechanism installed between the pressing block and the fixed plate and sequentially distributed along the workpiece conveying direction, and their lower parts are rotatably connected to the pressing block; it is characterized in that the connection point between the first elastic guide rod mechanism and the pressing block is located at the middle position of the top of the pressing block, and the elastic force of the second elastic guide rod mechanism acting on the pressing block is less than the elastic force of the first elastic guide rod mechanism acting on the pressing block, so that when the workpiece is pressed under the pressing block, the pressing block can rotate around the aforementioned connection point to force the front of the pressing block to press against the workpiece. The present invention can prevent the pressing block from generating an inclination angle when working, ensure that the pressing block can always press the abrasive belt tightly against the workpiece, and improve the effect of removing burrs on the workpiece surface.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical manufacturing equipment, and in particular relates to an adaptive pressing and grinding mechanism. Background Art

[0002] Existing belt grinding equipment is usually equipped with a pressing mechanism, which presses the belt against the workpiece so that the belt can better contact and fit the workpiece surface, thereby improving the grinding effect. The pressing mechanism can also prevent the belt from becoming loose and slipping after the equipment has been used for a long time, thereby affecting the grinding effect.

[0003] The installation direction of the pressure grinding mechanism on the abrasive belt grinding equipment is perpendicular to the conveying direction of the workpiece, and it is mainly composed of a fixed plate and a number of floating pressure block mechanism units arranged side by side on the fixed plate. Each floating pressure block mechanism unit includes a pressure block and two elastic guide rod mechanisms installed between the pressure block and the fixed plate. Each elastic guide rod mechanism is composed of a guide rod with a lower end hinged on the pressure block and an upper end equipped with a movable bushing in a guide hole provided on the fixed plate, and a spring sleeved on the guide rod. When the abrasive belt contacts the workpiece, the burrs on the workpiece push up the pressure block, compressing the spring to generate elastic force, thereby forcing the abrasive belt to further press against the workpiece.

[0004] However, the existing pressing and grinding mechanism exposes the following problems when used:

[0005] For each elastic guide rod mechanism, the two guide rods are symmetrically distributed at the sides of the pressure block, and the spring forces on them are the same, which results in the following situation: when the workpiece is conveyed with the belt and slowly squeezed into the abrasive belt, the side of the pressure block facing the conveying direction of the workpiece is first tilted up due to the large spring compression force, while the spring on the other side does not enter the compression state due to the small pressure, causing the pressure block to tilt up and produce an inclination angle in the conveying direction of the workpiece, which causes the pressure block as a whole to be unable to drive the abrasive belt to stick to the surface of the workpiece well during this process, thus affecting the burr grinding effect.

[0006] Although the springs on both sides of the pressure block can act on the pressure block simultaneously to press the abrasive belt onto the workpiece when the workpiece is transported forward to completely lift the pressure block, overall, the effect of the abrasive belt on removing burrs on the workpiece surface will be reduced due to the influence of the previous lifted state of the pressure block. Summary of the invention

[0007] The purpose of the present invention is to overcome the shortcomings of the prior art and provide an adaptive pressing and grinding mechanism which, when installed on a belt grinding device, can prevent the pressing block from generating an inclination angle, ensure that the pressing block can always press the belt tightly against the workpiece, and improve the effect of removing burrs on the workpiece surface.

[0008] The technical solution of the present invention is: an adaptive pressing and grinding mechanism, which is installed on the belt grinding equipment to press the sanding belt and is arranged horizontally relative to the workpiece conveying belt. It includes a fixed plate and a plurality of floating pressing block mechanism units arranged side by side on the fixed plate. Each floating pressing block mechanism unit includes a pressing block and a first elastic guide rod mechanism and a second elastic guide rod mechanism installed between the pressing block and the fixed plate and sequentially distributed along the workpiece conveying direction. The lower parts of these two elastic guide rod mechanisms can be rotatably connected to the pressing block; it is characterized in that the connection point between the first elastic guide rod mechanism and the pressing block is located in the middle position of the top of the pressing block, and at the same time, the elastic force of the second elastic guide rod mechanism acting on the pressing block is less than the elastic force of the first elastic guide rod mechanism acting on the pressing block, so that when the workpiece is pressed under the pressing block, the pressing block can rotate around the connection point between the first elastic guide rod mechanism and the pressing block to force the front of the pressing block to press against the workpiece.

[0009] The middle position of the above scheme does not simply refer to the midpoint of the top of the pressing block, but refers to the midpoint or an area close to the midpoint, which we further define. The length of the pressing block in the present invention is L, and the distance from the connection point between the first elastic guide rod mechanism and the pressing block to the front end of the pressing block is L1, L1=1 / 3~1 / 2L, and the front end of the pressing block refers to the end of the pressing block facing the conveying direction of the workpiece.

[0010] Furthermore, in the present invention, the distance between the connection point between the second elastic guide rod mechanism and the pressing block and the connection point between the first elastic guide rod mechanism and the pressing block is L2, and L2=1 / 3~2 / 3L.

[0011] Furthermore, in the present invention, L1=3 / 7L, L2=4 / 7L.

[0012] Furthermore, the first elastic guide rod mechanism in the present invention includes a first guide rod whose lower end is hinged on the pressure block and whose upper end is fitted in a guide hole provided on the fixed plate using a first movable bushing, and a first spring which is sleeved on the first guide rod and whose two ends are respectively abutted against the first movable bushing and a convex step formed on the first guide rod, and the second elastic guide rod mechanism includes a second guide rod whose lower end is hinged on the pressure block and whose upper end is fitted in a guide hole provided on the fixed plate using a second movable bushing, and a second spring which is sleeved on the second guide rod and whose two ends are respectively abutted against the second movable bushing and a convex step formed on the second guide rod; wherein the elastic force of the second spring is smaller than the elastic force of the first spring.

[0013] Furthermore, in the present invention, a first lower spring washer is provided on the convex step of the first guide rod, and a first upper spring washer is sleeved on the first guide rod at the bottom of the first movable bushing, and the first spring is disposed between the first upper spring washer and the first lower spring washer.

[0014] Furthermore, in the present invention, a second lower spring washer is provided on the convex step of the second guide rod, and a second upper spring washer is sleeved on the second guide rod at the bottom of the second movable bushing, and the second spring is disposed between the second upper spring washer and the second lower spring washer.

[0015] Furthermore, the pressing block described in the present invention includes a graphite plate and a graphite plate fixing block, the front and rear of the graphite plate fixing block are fixed with L-shaped inserts by screws, and the graphite plate is attached to the bottom of the graphite plate fixing block, and slots are provided at the front and rear, respectively for the L-shaped inserts on both sides to be inserted to be fixed to the graphite plate fixing block, the graphite plate and the graphite plate fixing block have the same length, and the length of the pressing block is the length of the graphite plate fixing block.

[0016] The working principle of the present invention is:

[0017] The present invention is installed on the existing belt grinding equipment and is located on the inner side of the grinding belt to compress the belt. It is arranged transversely relative to the workpiece conveying belt below. In actual use, the workpiece is conveyed by the workpiece conveying belt and squeezed under the belt. Since the elastic force of the first elastic guide rod mechanism on the pressing block facing the workpiece conveying direction is greater than the elastic force of the second elastic guide rod mechanism at the far end, the spring on the second elastic guide rod mechanism is compressed first, which causes the far end of the pressing block to tilt and rotate around the connection point between the first elastic guide rod mechanism and the pressing block, forcing the front of the pressing block to keep pressing the workpiece, so that the belt and the workpiece are in better contact and close contact, thereby effectively improving the deburring effect.

[0018] The advantages of the present invention are:

[0019] (1) Compared with the conventional pressing and grinding mechanism, the present invention avoids the generation of an inclination angle of the pressing block when it is installed on the belt grinding equipment by adjusting the two elastic guide rod mechanisms, ensuring that the pressing block can always press the belt tightly against the workpiece, thereby further improving the effect of removing burrs on the workpiece surface.

[0020] (2) The present invention has a simple structure, requires little improvement over the original mechanism, and is easy to implement. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0022] Figure 1 It is a schematic diagram of the installation structure of the present invention on an existing belt grinder;

[0023] Figure 2 for Figure 1 AA view (the arrow on the right side of the figure indicates the workpiece conveying direction);

[0024] Figure 3 for Figure 2A schematic diagram of a state change (the workpiece continues to be transported forward);

[0025] Figure 4 for Figure 2 Another schematic diagram of the state change (the workpiece is completely under the pressure block).

[0026] Wherein: 1, fixed plate; 2, pressing block; 2a, graphite plate; 2b, graphite plate fixing block; 2c, L-shaped insert; 3, first elastic guide rod mechanism; 3a, first movable bushing; 3b, first guide rod; 3c, first spring; 3d, first lower spring gasket; 3e, first upper spring gasket; 4, second elastic guide rod mechanism; 4a, second movable bushing; 4b, second guide rod; 4c, second spring; 4d, second lower spring gasket; 4e, second upper spring gasket; 5, equipment frame; 6, motor; 7, grinding driving wheel; 8, grinding driven wheel; 9, sanding belt tensioning wheel; 10, sanding belt; 11, transmission belt; 12, lining belt; 13, workpiece conveying belt; 14, workpiece; Q, adaptive pressing and grinding mechanism. DETAILED DESCRIPTION

[0027] Example: Figure 1 The figure shows a common belt grinder, which has a motor 6, a grinding driving wheel 7, a grinding driven wheel 8, a belt tensioning wheel 9 and an adaptive grinding mechanism Q of the present invention installed on a machine frame 5. The motor 6 drives the grinding driving wheel 7 to operate through a transmission belt 11, and a grinding belt 10 is sleeved on the grinding driving wheel 7, the grinding driven wheel 8 and the belt tensioning wheel 9. At the same time, a lining belt 12 is sleeved on the grinding driving wheel 7 and the grinding driven wheel 8 to pad the back of the grinding belt 10 and operate synchronously with the grinding belt 10. The adaptive grinding mechanism of the present invention is installed between the grinding driving wheel 7 and the grinding driven wheel 8, and the inner side of the grinding belt 10 is used to press the grinding belt 10 downward. Below the grinding belt 10 is a workpiece conveying belt 13 for conveying a workpiece 14. The adaptive grinding mechanism is arranged horizontally above the workpiece conveying belt 13 like the grinding belt 10, and the running direction of the grinding belt 10 is perpendicular to the running direction of the workpiece conveying belt 13.

[0028] Further integration Figure 1 and Figure 2 As shown, the adaptive pressing mechanism Q provided by the present invention is composed of a fixed plate 1 and a plurality of floating pressing block mechanism units arranged side by side on the fixed plate 1, and each floating pressing block mechanism unit is composed of a pressing block 2 and a first elastic guide rod mechanism 3 and a second elastic guide rod mechanism 4 installed between the pressing block 2 and the fixed plate 1 and sequentially distributed along the conveying direction of the workpiece 14.

[0029] The installation position of the two elastic guide rod mechanisms is the core improvement point of this case:

[0030] Specific combination Figure 2As shown, the first elastic guide rod mechanism 3 is composed of a first movable bushing 3a, a first guide rod 3b, a first spring 3c, a first lower spring washer 3d, a first upper spring washer 3e and a pin (not shown) for hingedly connecting the pressing block 2 and the first guide rod 3b. The lower end of the first guide rod 3b is hinged to the hinge seat integrally formed at the top of the pressing block 2 by a pin, and the upper end of the first guide rod 3b is assembled in the guide hole provided on the fixed plate 1 by the first movable bushing 3a. A convex step is formed on the first guide rod 3b, and a first lower spring washer 3d is provided on the convex step. At the same time, a first upper spring washer 3e is sleeved on the first guide rod 3b at the bottom of the first movable bushing 3a. The first spring 3c is sleeved on the first guide rod 3b and is arranged between the first upper spring washer 3e and the first lower spring washer 3d.

[0031] Similarly, the second elastic guide rod mechanism 4 is composed of a second movable bushing 4a, a second guide rod 4b, a second spring 4c, a second lower spring washer 4d, a second upper spring washer 4e and a pin (not shown) for hingedly connecting the pressing block 2 and the second guide rod 4b. The lower end of the second guide rod 4b is hinged to the hinge seat integrally formed at the top of the pressing block 2 by a pin, and the upper end of the second guide rod 4b is assembled in the guide hole provided on the fixed plate 1 by the second movable bushing 4a. A convex step is formed on the second guide rod 4b, and a second lower spring washer 4d is provided on the convex step. At the same time, a second upper spring washer 4e is sleeved on the second guide rod 4b at the bottom of the second movable bushing 4a. The second spring 4c is sleeved on the second guide rod 4b and abuts against the second upper spring washer 4e and the second lower spring washer 4d.

[0032] In this embodiment, the second spring 4c is a thin spring, while the first spring 3c is a thick spring, and the elastic force of the second spring 4c is smaller than the elastic force of the first spring 3c.

[0033] In this embodiment, the length of the pressing block 2 is L, and the pin hinge of the first guide rod 3b and the pressing block 2 is

[0034] The distance from the connection point between the first elastic guide rod mechanism 3 and the pressing block 2 to the front end of the pressing block 2 is L1. L1 refers to the end of the pressing block 2 facing the conveying direction of the workpiece 14. Figure 2 The distance between the pin hinge of the second guide rod 4b and the pressing block 2 (i.e., the connection point of the second elastic guide rod mechanism 4 and the pressing block 2) and the pin hinge of the first guide rod 3b and the pressing block 2 is L2, and in this embodiment, L1=3 / 7L, and L2=4 / 7L.

[0035] Since the connection point between the first elastic guide rod mechanism 3 and the pressure block 2 is located in the middle of the top of the pressure block 2, and the elastic force of the second elastic guide rod mechanism 4 on the pressure block 2 is smaller than the elastic force of the first elastic guide rod mechanism 3 on the pressure block 2, when the workpiece 14 is pressed under the pressure block 2, the pressure block 2 can rotate around the connection point between the first elastic guide rod mechanism 3 and the pressure block 2, forcing the front of the pressure block 2 to press against the workpiece 14.

[0036] More specifically combined Figure 2~Figure 4 As shown, the pressing block 2 in this embodiment is composed of a graphite plate 2a, a graphite plate fixing block 2b, two L-shaped inserts 2c and screws. The front and rear of the graphite plate fixing block 2b are fixed with L-shaped inserts 2c by screws, and the graphite plate 2a is attached to the bottom of the graphite plate fixing block 2b, and slots are provided in the front and rear thereof, respectively for the L-shaped inserts 2c on both sides to be inserted and fixed to the graphite plate fixing block 2b. The graphite plate 2a and the graphite plate fixing block 2b have the same length, and the length of the pressing block 2 mentioned above is the length of the graphite plate fixing block 2b.

[0037] Combine the following Figure 1~Figure 4 As shown, the working principle of the present invention is:

[0038] The present invention is installed on the existing belt grinding equipment and is located on the inner side of the belt 10 to compress the belt 10, and is arranged transversely relative to the workpiece conveying belt 13 below. In actual use, the workpiece 14 is conveyed by the workpiece conveying belt 13 and squeezed under the belt 10. Since the elastic force of the first elastic guide rod mechanism 3 on the pressing block 2 facing the workpiece conveying direction acting on the pressing block 2 is greater than the elastic force of the second elastic guide rod mechanism 4 at the far end acting on the pressing block 2, the second spring 4c of the second elastic guide rod mechanism 4 is compressed first, which causes the far end of the pressing block 2 to tilt and rotate around the connection point between the first elastic guide rod mechanism 3 and the pressing block 2, forcing the front of the pressing block 2 to keep pressing the workpiece 14, so that the belt 10 and the workpiece 14 are in better contact and close contact, thereby effectively improving the deburring effect.

[0039] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any modifications made according to the spirit of the main technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. An adaptive pressing mechanism, installed on a belt grinding device for pressing an abrasive belt (10), and arranged transversely relative to a workpiece conveying belt (13), comprising a fixed plate (1) and a plurality of floating pressing block mechanism units arranged side by side on the fixed plate (1), each floating pressing block mechanism unit comprising a pressing block (2) and a first elastic guide rod mechanism (3) and a second elastic guide rod mechanism (4) installed between the pressing block (2) and the fixed plate (1) and sequentially distributed along the conveying direction of the workpiece (14), the lower parts of the two elastic guide rod mechanisms being rotatably connected to the pressing block (2); characterized in that The connection point between the first elastic guide rod mechanism (3) and the pressing block (2) is located in the middle of the top of the pressing block (2), and the elastic force of the second elastic guide rod mechanism (4) on the pressing block (2) is smaller than the elastic force of the first elastic guide rod mechanism (3) on the pressing block (2), so that when the workpiece (14) is pressed under the pressing block (2), the pressing block (2) can rotate around the connection point between the first elastic guide rod mechanism (3) and the pressing block (2), forcing the front of the pressing block (2) to press against the workpiece (14). The length of the block (2) is L, and the distance from the connection point between the first elastic guide rod mechanism (3) and the pressing block (2) to the front end of the pressing block (2) is L1, L1=1 / 3~1 / 2L, the front end of the pressing block (2) refers to the end of the pressing block (2) facing the conveying direction of the workpiece (14), and the distance from the connection point between the second elastic guide rod mechanism (4) and the pressing block (2) to the connection point between the first elastic guide rod mechanism (3) and the pressing block (2) is L2, L2=1 / 3~2 / 3L.

2. The adaptive grinding mechanism according to claim 1, characterized in that The L1=3 / 7L, L2=4 / 7L.

3. The adaptive grinding mechanism according to claim 1 or 2, characterized in that The first elastic guide rod mechanism (3) comprises a first guide rod (3b) whose lower end is hinged on the pressing block (2) and whose upper end is assembled in a guide hole provided on the fixed plate (1) by using a first movable bushing (3a), and a first spring (3c) which is sleeved on the first guide rod (3b) and whose two ends respectively abut against the first movable bushing (3a) and a convex step formed on the first guide rod (3b), while the second elastic guide rod mechanism (4) comprises a second guide rod (4b) whose lower end is hinged on the pressing block (2) and whose upper end is assembled in a guide hole provided on the fixed plate (1) by using a second movable bushing (4a), and a second spring (4c) which is sleeved on the second guide rod (4b) and whose two ends respectively abut against the second movable bushing (4a) and a convex step formed on the second guide rod (4b); wherein the elastic force of the second spring (4c) is smaller than the elastic force of the first spring (3c).

4. The adaptive grinding mechanism according to claim 3, characterized in that A first lower spring washer (3d) is provided on the convex step of the first guide rod (3b), and a first upper spring washer (3e) is sleeved on the first guide rod (3b) at the bottom of the first movable bushing (3a), and the first spring (3c) is disposed between the first upper spring washer (3e) and the first lower spring washer (3d).

5. The adaptive grinding mechanism according to claim 3, characterized in that A second lower spring washer (4d) is provided on the convex step of the second guide rod (4b), and a second upper spring washer (4e) is sleeved on the second guide rod (4b) at the bottom of the second movable bushing (4a), and the second spring (4c) is disposed between the second upper spring washer (4e) and the second lower spring washer (4d).

6. The adaptive grinding mechanism according to claim 1 or 2, characterized in that The pressing block (2) comprises a graphite plate (2a) and a graphite plate fixing block (2b); L-shaped inserts (2c) are fixed to the front and rear of the graphite plate fixing block (2b) by screws; the graphite plate (2a) is attached to the bottom of the graphite plate fixing block (2b); slots are provided at the front and rear of the graphite plate, respectively, for the L-shaped inserts (2c) on both sides to be inserted and fixed to the graphite plate fixing block (2b); the graphite plate (2a) and the graphite plate fixing block (2b) have the same length, and the length of the pressing block (2) is the same as the length of the graphite plate fixing block (2b).

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