A centerless grinder workpiece center support rigidity adjustable type platen assembly

Abstract

This invention relates to an adjustable workpiece center support stiffness pallet assembly for a centerless grinder, comprising a base with a positioning element at the bottom. The base is concave in shape, and side openings are provided on the top walls of both ends of the base. A support column, a lower threaded disc, and an upper threaded disc are arranged within the side openings. The beneficial effects of this invention are: by rotating the lower threaded disc, its position at the bottom of the support column changes; by rotating the upper threaded disc, its position at the end of the support column changes. The support column can move vertically, and is limited by the upper and lower threaded discs. This change in the support column's stroke alters the stroke of the upper pallet at the top of the support column, allowing for greater flexibility in use. The altered stroke provides different buffer descent ranges to adapt to different workpiece processing requirements.

Description

Technical Field

[0001] This invention relates to the field of pallet assembly technology, specifically to a centerless grinder workpiece center support stiffness adjustable pallet assembly. Background Technology

[0002] In the grinding of precision rotating workpieces such as bearing rollers and automotive pins on a centerless grinder, the support plate assembly, as the core support component of the workpiece, directly determines the workpiece's machining accuracy, surface quality, and machining stability through its support rigidity and movement characteristics.

[0003] Existing centerless grinder pallet assemblies are mostly fixed rigid structures with fixed and non-adjustable pallet travel. They can only provide support with a single rigidity and cannot adapt to workpieces of different materials, sizes, and rigidity requirements. At the same time, existing pallets lack flexible movable structures and adopt a rigid support method. During the support process, they cannot buffer the contact impact force between the workpiece and the pallet, which can easily lead to damage such as indentations and scratches on the workpiece surface. This risk of damage is significantly increased, especially for soft materials with extremely high surface precision requirements. The support state cannot be flexibly adjusted according to the actual support requirements of the workpiece. Summary of the Invention

[0004] The purpose of this invention is to provide a centerless grinder workpiece center support stiffness adjustable pallet assembly, to solve the problems mentioned in the background art. Existing centerless grinder pallet assemblies are mostly fixed rigid structures with fixed and non-adjustable pallet travel, providing only support with a single stiffness. This makes them unsuitable for workpieces of different materials, sizes, and stiffness requirements. Furthermore, existing pallets lack elastic movable structures and use rigid support, which cannot buffer the contact impact between the workpiece and the pallet during support, easily leading to indentations, scratches, and other damage on the workpiece surface. This is especially problematic for soft materials with extremely high surface precision requirements, where the risk of damage increases significantly, and the support state cannot be flexibly adjusted according to the actual support needs of the workpiece.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an adjustable workpiece center support pallet assembly for a centerless grinder, comprising a base, a positioning component at the bottom of the base, the base being concave in shape, and side openings at the top of both ends of the base, wherein a support column, a lower threaded disc, and an upper threaded disc are arranged within the side openings, the support column being movably connected to the top of the side opening and threadedly connected to both the lower and upper threaded discs, an elastic component being provided outside the support column for elastically moving the support column, a snap-fit ​​component being fixedly connected to the top of the support column, and an upper pallet being detachably connected to the snap-fit ​​component, the upper pallet being used to support the workpiece.

[0006] Preferably, the upper support plate has slots at both the upper and lower end walls, which penetrate the upper and lower end walls and the left and right end walls of the upper support plate, respectively.

[0007] Preferably, the inner core plate is engaged in one or more slots in the upper support plate, and both the inner core plate and the upper support plate are rectangular.

[0008] Preferably, the snap-fit ​​component includes a rectangular top seat arranged between the upper support plate and the top screw seat, a rectangular opening through the upper wall in the top seat, a rectangular sliding block movably connected in the opening, and a threaded rod horizontally passing through and threadedly connected to the sliding block. The threaded rod is rotatably connected to the top seat, and the top seat is fixedly connected to the support column.

[0009] Preferably, the snap-fit ​​component further includes a rectangular clamping plate fixed to the top wall of the sliding block, a threaded connecting strip at the front and rear end walls of the clamping plate, and a clamping strip fixed to the end wall of the threaded connecting strip away from the clamping plate. Multiple clamping strips are provided and are distributed in a ring around the axis of the threaded connecting strip.

[0010] Preferably, the bottom of the support column is located in the side opening with a lower threaded disc and an upper threaded disc threaded on the bottom, respectively. The lower threaded disc and the upper threaded disc are used to limit the movement of the support column.

[0011] Preferably, the elastic element is a spring, and a spring is sleeved on the outside of the support column. The support column is threadedly connected to the top screw seat near the top seat. The upper wall of the spring abuts against the lower wall of the top screw seat and the upper wall abuts against the top walls of the left and right ends of the base.

[0012] Preferably, the positioning component includes a lead screw symmetrically threaded through and connected to the left and right ends of the bottom of the base, a disc-shaped support fixed to the bottom wall of the lead screw, and threaded holes through the end wall of the support. Multiple threaded holes are provided, and the threaded holes are distributed axially and radially about the support.

[0013] Preferably, the base has openings at both the left and right end walls at the bottom, the openings are rectangular, and the openings are used to accommodate the support.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention changes the position of the lower threaded disc at the bottom of the support column by rotating, and changes the position of the upper threaded disc at the end of the support column by rotating. The support column can move up and down, and is limited by the upper and lower threaded discs. The change in the movement stroke of the support column changes the movement stroke of the upper support plate set at the top of the support column, making the upper support plate more flexible in use. After changing the movement stroke, there are different buffer descent ranges to adapt to different workpiece processing requirements. For example, the arrangement of elastic elements at the same time allows the support column to have buffering properties when moving, so as to buffer the upper support plate. The stroke of the upper support plate is adjustable and buffered, changing the rigidity of the upper support plate to adapt to the use requirements of different workpieces. When grinding small diameter and light weight workpieces, if the support plate is too hard, it is easy to "lock" the workpiece, resulting in grinding deformation. At this time, the rigidity of the upper support plate is adjusted to decrease. When grinding large diameter and heavy weight workpieces, the support plate will undergo elastic deformation due to insufficient rigidity, causing ellipticity or vibration marks in the workpiece. At this time, the rigidity of the upper support plate is increased.

[0015] 2. This invention features a rectangular inner core plate and an upper support plate. The upper support plate can be detached and its end face flipped to switch positions, allowing for end face replacement. This replaces a worn end face of the upper support plate after prolonged use, improving the utilization rate of the upper support plate. Furthermore, an inner core plate is arranged at each end face of the upper support plate. The inner core plate can also be detached and its end face flipped to switch positions, allowing for end face replacement. This replaces a worn end face with a brand-new, unused end face, making full use of each end face and enhancing the flexibility of the entire structure during use.

[0016] 3. This invention uses the rotation of the threaded rod to drive the sliding block to move along the axis of the threaded rod, changing the position of the sliding block. After the sliding block moves, it drives the clamping plate to move laterally. The end face of the clamping plate is in contact with the side end face of the upper support plate, which is used to clamp and limit the upper support plate. It limits the installation of the upper support plate and facilitates the disassembly and assembly of the upper support plate and the inner core plate placed at the slot of the upper support plate. The clamping plate is in contact with the side of the inner core plate at the slot and the side of the upper support plate to stably limit the upper support plate and the inner core plate. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a centerless grinder workpiece center support stiffness adjustable pallet assembly according to the present invention; Figure 2 This is a schematic diagram of the internal structure of the top seat and upper support plate of a centerless grinder workpiece center support adjustable stiffness pallet assembly according to the present invention. Figure 3 This is a schematic diagram of the slot and inner core plate structure of the upper support plate of the adjustable support plate assembly for the center support stiffness of the workpiece in a centerless grinder according to the present invention. Figure 4This invention relates to an adjustable workpiece center support pallet assembly for a centerless grinder. Figure 1 Enlarged structural diagram at point A in the middle; Figure 5 This invention relates to an adjustable workpiece center support pallet assembly for a centerless grinder. Figure 1 Enlarged structural diagram at point B.

[0018] In the diagram: 1. Base; 2. Through hole; 3. Support; 4. Threaded hole; 5. Lead screw; 6. Side opening; 7. Support column; 8. Lower threaded disc; 9. Upper threaded disc; 10. Spring; 11. Top screw seat; 12. Top seat; 13. Opening; 14. Threaded rod; 15. Sliding block; 16. Clamping plate; 17. Threaded strip; 18. Pressure strip; 19. Upper support plate; 20. Slot; 21. Inner core plate. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0020] In the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0022] Please see Figure 1-5This invention provides a technical solution: an adjustable workpiece center support pallet assembly for a centerless grinder, comprising a base 1, a positioning element at the bottom of the base 1, the base 1 being concave in shape, and side openings 6 at the top of both ends of the base 1, within which a support column 7, a lower threaded disc 8, and an upper threaded disc 9 are arranged. The support column 7 is movably connected to the top of the side opening 6 and threadedly connected to both the lower and upper threaded discs 8 and 9. An elastic element is provided outside the support column 7 for elastically moving the support column 7. The top is fixed with a snap-fit ​​connector, at which the upper support plate 19 is detachably connected. The upper support plate 19 is used to support the workpiece. The base 1 is connected to the guide wheel of the centerless grinder, the guide rail of the centerless grinder tool holder or the support plate seat via a positioning component. After assembly, the lower threaded disc 8 and the upper threaded disc 9 rotate and shift at the support column 7, changing the position of the upper threaded disc 9 on the support column 7. The upper threaded disc 9 is sleeved and threadedly connected to the outside of the support column 7. The top wall of the lower threaded disc 8 is fixed with a threaded rod, which is threadedly connected inside the support column 7. 8. Rotate to change the position at the bottom of the support column 7. The upper threaded disk 9 rotates to change the position at the end of the support column 7. The support column 7 can move up and down and is limited by the upper threaded disk 9 and the lower threaded disk 8. The change in the stroke of the support column 7 changes the stroke of the upper support plate 19 set at the top of the support column 7. This makes the upper support plate 19 more flexible in use. After changing the stroke, there are different buffer descent ranges to adapt to different workpiece processing requirements. For example, the arrangement of elastic elements at the same time makes the support column 7 have buffering properties when it moves, so as to buffer the upper support plate 19. The stroke of the upper support plate 19 is adjustable and buffered, changing the rigidity of the upper support plate 19 to adapt to different workpiece usage requirements. When grinding small diameter and light weight workpieces, if the support plate is too hard, it is easy to "lock" the workpiece, resulting in grinding deformation. At this time, the rigidity of the upper support plate 19 is adjusted to decrease. When grinding large diameter and heavy weight workpieces, the support plate will undergo elastic deformation due to insufficient rigidity, causing the workpiece to produce ellipticity or vibration marks. At this time, the rigidity of the upper support plate 19 is increased. The upper support plate 19 has slots 20 at both its upper and lower end walls. The slots 20 penetrate the upper and lower end walls of the upper support plate 19 and the left and right end walls of the upper support plate 19. Each pair of slots 20 of the upper support plate 19 is fitted with an inner core plate 21. Both the inner core plate 21 and the upper support plate 19 are rectangular. The upper support plate 19 can be disassembled and its end face can be flipped to switch the position of the upper and lower end faces to replace the end face. This replaces a worn end face of the upper support plate 19 after long-term use, thereby improving the utilization rate of the upper support plate 19. In addition, an inner core plate 21 is arranged at each end face of the upper support plate 19. The inner core plate 21 can also be disassembled and its end face flipped to switch the position of the upper and lower end faces to replace the end face. This replaces a worn end face of the inner core plate 21 after long-term use, replacing a worn end face with another unused new end face, making full use of each end face and enhancing the flexibility of the entire structure during use. The snap-fit ​​component includes a rectangular top seat 12 arranged between the upper support plate 19 and the top screw seat 11, a rectangular opening 13 penetrating the upper wall inside the top seat 12, a rectangular sliding block 15 movably connected inside the opening 13, and a threaded rod 14 horizontally inserted and threadedly connected to the sliding block 15. The threaded rod 14 is rotatably connected to the top seat 12, and the top seat 12 is fixedly connected to the support column 7. When the threaded rod 14 rotates, it drives the sliding block 15 to move along the axis of the threaded rod 14. The position of the sliding block 15 is changed. After the sliding block 15 is displaced, the clamping plate 16 is moved to the side. The end face of the clamping plate 16 is attached to the side end face of the upper support plate 19 to clamp and limit the upper support plate 19. The upper support plate 19 is installed and limited. At the same time, it is convenient to disassemble and install the upper support plate 19 and the inner core plate 21 placed at the slot 20 of the upper support plate 19. The clamping plate 16 is attached to the side of the inner core plate 21 at the slot 20 and the side of the upper support plate 19 to stably limit the upper support plate 19 and the inner core plate 21. The snap-fit ​​component also includes a rectangular clamping plate 16 fixed to the top wall of the sliding block 15, a threaded connecting strip 17 threaded to the front and rear end walls of the clamping plate 16, and a clamping strip 18 fixed to the end wall of the threaded strip 17 away from the clamping plate 16. Multiple clamping strips 18 are provided and are distributed in a ring about the axis of the threaded strip 17. When the threaded strip 17 is rotated, the position of the clamping strip 18 at the threaded strip 17 is changed, so that the end face of the clamping strip 18 is in contact with the front and rear end faces of the upper support plate 19, and the upper support plate 19 is clamped and limited, making the upper support plate 19 more secure when positioned. The bottom of the support column 7 is located in the side opening 6, with the lower threaded plate 8 and the upper threaded plate 9 threaded on the top and bottom respectively. The lower threaded plate 8 and the upper threaded plate 9 are used to limit the movement of the support column 7. After the lower threaded plate 8 and the upper threaded plate 9 rotate, the distance between the lower threaded plate 8 and the upper threaded plate 9 changes, and the movement in the side opening 6 changes, thereby changing the movement of the support column 7 and the upper support plate 19 installed on the support column 7. After the upper support plate 19 has moved to its full movement, it provides rigid support and automatically switches between rigid and flexible. The elastic element is a spring 10, and a spring 10 is also sleeved on the outside of the support column 7. The support column 7 is threadedly connected to the top screw seat 11 near the top seat 12. The upper wall of the spring 10 abuts against the lower wall of the top screw seat 11, and the upper wall abuts against the top walls of the left and right ends of the base 1. The elastic force of the spring 10 makes the support column 7 elastic when it moves, and the upper support plate 19 also has elasticity when it moves, so as to support the workpiece in a relatively soft way. The top screw seat 11 rotates, and its vertical height on the support column 7 changes. After the top screw seat 11 changes its height, it changes the distance between itself and the top walls of the two ends of the base 1, which changes the compression state of the spring 10, changes the elastic force of the spring 10, and thus changes the elastic coefficient of the support column 7 when it moves, and changes the support elastic stiffness of the support column 7. The positioning component includes a lead screw 5 symmetrically threaded through and connected to the left and right ends of the bottom of the base 1, a disc-shaped support 3 fixed to the bottom wall of the lead screw 5, and threaded holes 4 through the end wall of the support 3. Multiple threaded holes 4 are provided, which are distributed about the axial and radial directions of the support 3. Multiple threaded holes 4 are provided to allow threaded parts to be threaded through the axial and radial directions of the support 3 to position and install the support 3. This facilitates the flexible assembly and connection of the support 3 with the pre-set holes on the guide rail. Rotating the lead screw 5 changes the position of the support 3 and the position and orientation of the threaded holes 4 at the end of the support 3, making the installation of the support 3 more flexible and convenient. The base 1 has openings 2 at both the left and right ends of the bottom. The openings 2 are rectangular and are used to accommodate the support 3. The openings 2 can accommodate the support 3 which can be rotated and adjusted upwards, making it convenient to store the support 3. When maintaining and servicing the base 1, it is more convenient and flexible to move and support it.

[0023] In summary, this centerless grinder workpiece center support adjustable rigidity pallet assembly, when in use, Rotate the lead screw 5 to move the support 3 out from the through 2. The screws are inserted into the multiple threaded holes 4 on the end wall of the support 3 and connected to the preset holes on the guide rail. The base 1 is installed below the grinding wheel guide wheel of the centerless grinder and on the guide rail of the centerless grinder tool plate holder or support plate seat. The upper support plate 19 is made of cemented carbide and is used to support the bottom of the workpiece in conjunction with the grinding wheel guide wheel of the centerless grinder, so as to facilitate the workpiece processing. After prolonged use, the threaded rod 14 at the top seat 12 rotates, the transmission sliding block 15 moves to the side, and the two clamping plates 16 are adjusted and separated respectively. The upper support plate 19 is removed and flipped to replace the end face, which facilitates the switching of the end face for use and replaces the worn end face. At the same time, the inner core plate 21 in the slot 20 can also be used to switch the end face, which facilitates the alternation of multiple end faces, improves the service life, and has a high utilization rate and is safer during use. The inner core plate 21 is snapped into the slot 20. The side of the inner core plate 21 fits the side of the upper support plate 19 and the side of the clamping plate 16, pressing and limiting the inner core plate 21 and the upper support plate 19. The upper support plate 19 and the inner core plate 21 are jointly limited and connected, which facilitates their assembly and installation. When the screw rod 17 rotates, the screw rod 17 is displaced, and the clamping strip 18 is displaced accordingly, fitting against the front and rear end faces of the upper support plate 19 to limit and position the upper support plate 19, so as to facilitate the stable placement and use of the upper support plate 19. The side opening 6 is used to accommodate the bottom area of ​​the support column 7. The lower threaded disc 8 and the upper threaded disc 9 are both located in the bottom area of ​​the support column 7. In use, the lower threaded disc 8 and the upper threaded disc 9 are rotated respectively to change the distance between the lower threaded disc 8 and the upper threaded disc 9, so that the travel of the lower threaded disc 8 and the upper threaded disc 9 in the side opening 6 is changed. This allows for flexible adjustment of the travel of the support column 7. After the support column 7 has traveled its full travel, it is rigidly supported to prevent excessive movement and the workpiece from leaving the processing position. At the same time, with the spring 10, the soft and hard rigid supports can be switched and adjusted to make it more flexible in use. After the top screw seat 11 is rotated and displaced, the elasticity of the spring 10 is changed, so that the travel elasticity during movement is changed, thus changing the rigidity of the support. When the lower threaded disc 8 and the upper threaded disc 9 are both rotated and adjusted and are respectively in contact with the lower wall and the upper wall of the side opening 6, the support column 7 is fully rigidly supported to stably adapt to the workpiece. The support rigidity of the upper support plate 19 is adjustable to accommodate workpieces of different diameters and masses. When grinding small-diameter, lightweight workpieces, if the support plate is too hard, it is easy to "lock" the workpiece, causing grinding deformation. In this case, the rigidity of the upper support plate 19 can be adjusted to provide elastic support to adapt to the workpiece. When grinding large-diameter, heavy workpieces, the support plate may deform elastically due to insufficient rigidity, causing the workpiece to develop ellipticity or vibration marks. In this case, the rigidity of the upper support plate 19 is adjusted to provide pure hardness rigid support to adapt to the workpiece.

[0024] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A centerless grinding machine workpiece center support rigidity adjustable type of pallet assembly comprising a base (1), characterized in that: The base (1) is provided with a positioning component at the bottom. The base (1) is in the shape of a concave character. The top walls of the left and right ends of the base (1) are provided with side openings (6). The side openings (6) are provided with a support column (7), a lower threaded plate (8) and an upper threaded plate (9). The support column (7) is movably connected to the top of the side opening (6) and is threadedly connected to the lower threaded plate (8) and the upper threaded plate (9). The support column (7) is provided with an elastic component for flexibly moving the support column (7). The top of the support column (7) is fixedly connected with a snap-fit ​​component. The snap-fit ​​component is detachably connected to an upper support plate (19). The upper support plate (19) is used to support the workpiece.

2. The workpiece center support stiffness adjustable platen assembly of claim 1 wherein: The upper support plate (19) has slots (20) at both the upper and lower end walls. The slots (20) penetrate the upper and lower end walls of the upper support plate (19) and the left and right end walls of the upper support plate (19).

3. The adjustable stiffness pallet assembly for workpiece center support in a centerless grinder according to claim 2, characterized in that: The inner core plate (21) is snapped into a pair of slots (20) of the upper support plate (19), and both the inner core plate (21) and the upper support plate (19) are rectangular.

4. The adjustable stiffness pallet assembly for workpiece center support in a centerless grinder according to claim 3, characterized in that: The snap-fit ​​component includes a rectangular top seat (12) arranged between the upper support plate (19) and the top screw seat (11), a rectangular opening (13) penetrating the upper wall in the top seat (12), a rectangular sliding block (15) movably connected in the opening (13), and a threaded rod (14) horizontally inserted and threadedly connected at the sliding block (15). The threaded rod (14) is rotatably connected to the top seat (12), and the top seat (12) is fixedly connected to the support column (7).

5. The adjustable workpiece center support pallet assembly for a centerless grinder according to claim 4, characterized in that: The snap-fit ​​component also includes a rectangular clamping plate (16) fixed to the top wall of the sliding block (15), a threaded strip (17) threaded to the front and rear end walls of the clamping plate (16), and a clamping strip (18) fixed to the end wall of the threaded strip (17) away from the clamping plate (16). Multiple clamping strips (18) are provided and are distributed in a ring about the axis of the threaded strip (17).

6. The adjustable workpiece center support pallet assembly for a centerless grinder according to claim 5, characterized in that: The bottom of the support column (7) is located in the side opening (6), with the lower threaded plate (8) and the upper threaded plate (9) respectively threaded on the top and bottom. The lower threaded plate (8) and the upper threaded plate (9) are used to limit the movement of the support column (7).

7. The adjustable workpiece center support pallet assembly for a centerless grinder according to claim 6, characterized in that: The elastic element is a spring (10), and the spring (10) is sleeved on the outside of the support column (7). The support column (7) is threaded to the top screw seat (11) near the top seat (12). The upper wall of the spring (10) abuts against the lower wall of the top screw seat (11), and the upper wall abuts against the top walls of the left and right ends of the base (1).

8. The adjustable workpiece center support pallet assembly for a centerless grinder according to claim 7, characterized in that: The positioning component includes a lead screw (5) symmetrically threaded through and threaded to the left and right ends of the bottom of the base (1), a disc-shaped support (3) fixed to the bottom wall of the lead screw (5), and a threaded hole (4) through the end wall of the support (3). Multiple threaded holes (4) are provided, and the threaded holes (4) are distributed axially and radially about the support (3).

9. The adjustable workpiece center support pallet assembly for a centerless grinder according to claim 8, characterized in that: The base (1) has openings (2) at both the left and right end walls at the bottom. The openings (2) are rectangular and are used to accommodate the support (3).

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