Downholder with high mounting accuracy

Abstract

The utility model relates to a high installation precision's down pressure plate, the high installation precision's down pressure plate centre is equipped with the round convex ring that corresponds with the inner wall matching of down ball plate, the down pressure plate edge circumference is distributed with the adjusting screw hole that penetrates down pressure plate, the adjusting screw hole screw thread cooperation has by the setting leveling screw that goes down and up, the leveling screw end part and the bottom of down ball plate are opposite, the round convex ring edge even installation has a plurality of centering subassembly, the centering subassembly includes with the centering seat that round convex ring is connected, the centering screw that sets up radially outward, the centering screw middle part and centering seat screw thread cooperation, the centering screw end part and down ball plate inner wall are opposite, the utility model discloses the leveling screw supports down ball plate, also adjusts the height of each point of down ball plate edge, realizes the leveling of down ball plate, guarantees down ball plate top level, the centering subassembly safeguards down ball plate relative round convex ring concentric, the utility model discloses can improve the installation precision of down ball plate.

Description

Technical Field

[0001] This utility model relates to the technical field of vertical steel ball machines, and in particular to a pressure plate with high installation accuracy. Background Technology

[0002] The lower pressure plate is a horizontally positioned component in a vertical steel ball milling machine, located between the lower ball plate and the lower main shaft. The lower pressure plate supports the lower ball plate, ensuring the ball blank is ground, and also transmits torque to the lower ball plate. See the patent CN222038113U, which describes a novel lower main shaft drive device for a vertical steel ball milling machine. The lower ball plate is an integral ring; a rotating disk, positioned between the lower ball plate and the lower main shaft, serves as the lower pressure plate. A retaining strip engages with a radial groove to achieve synchronous rotation between the rotating disk and the lower ball plate. A boss engages with a groove to ensure the rotating disk and the lower ball plate remain coaxial. Currently, the levelness of the lower ball plate depends entirely on the installation and manufacturing precision of the lower pressure plate itself. This results in high manufacturing and installation costs for the lower pressure plate. Utility Model Content

[0003] The purpose of this invention is to solve the above problems and provide a pressure plate with high installation accuracy.

[0004] The technical solution of this utility model is as follows: A high-precision lower pressure plate has a centrally located circular convex ring that matches the inner wall of the lower ball plate, which can clamp the inner wall of the lower ball plate to achieve concentricity between the lower pressure plate and the lower ball plate; adjusting screw holes are distributed around the circumference of the lower pressure plate; the adjusting screw holes are threadedly fitted with leveling screws arranged from bottom to top; the length of the leveling screws extending beyond the top of the lower pressure plate varies; the ends of the leveling screws abut against the bottom of the lower ball plate to support the lower ball plate and adjust the height of various points along the edge of the lower ball plate to achieve leveling and ensure that the top of the lower ball plate is horizontal; several centering components are evenly installed along the edge of the circular convex ring; the centering components include a centering seat connected to the circular convex ring and a centering screw arranged radially outward; the middle part of the centering screw is threadedly fitted with the centering seat; rotating the centering screw allows the centering screw to extend radially outward along the lower pressure plate; the ends of the centering screws abut against the inner wall of the lower ball plate, tightening the lower ball plate and ensuring that the lower ball plate is concentric with the circular convex ring.

[0005] Preferably, the centering assembly includes two countersunk screws; the centering seat is convex in shape; the centering screws are threaded to the top of the centering seat; the centering seat raises the centering screws to a certain height to accommodate the lifting of the lower ball plate when the leveling screws level the lower ball plate; vertical countersunk holes are provided on both sides of the bottom of the centering seat; the countersunk screws pass through the countersunk holes and are threaded to the circular convex ring to ensure a stable connection between the centering seat and the circular convex ring.

[0006] Furthermore, the convex ring edge is provided with a recessed groove corresponding to the centering seat; the centering seat is installed in the recessed groove, and the height of the centering seat is appropriately reduced to ensure that the end of the centering screw is stably pressed against the inner wall of the lower ball plate; the inner edge of the recessed groove abuts against the side of the centering seat, which can support the centering seat, resist the inward movement of the centering seat, and improve the ability of the centering screw to press against the inner wall of the lower ball plate.

[0007] Furthermore, the centering assembly also includes a lock nut; the lock nut is disposed between the bolt head of the centering screw and the centering seat; the lock nut is threadedly engaged with the centering screw; the lock nut abuts against the side of the centering seat; the lock nut can prevent the centering screw from loosening or falling off.

[0008] Preferably, the top circumference is provided with radially distributed elongated drain holes for draining coolant; the inner end of the drain hole crosses the edge of the convex ring to receive coolant flowing towards the center on the lower ball plate; the middle of the drain hole is provided with a through drain hole to smoothly drain the coolant.

[0009] Furthermore, the outer end of the drain hole does not exceed the arrangement area of ​​the adjusting screw holes, which ensures that the arrangement area of ​​the adjusting screw holes is connected as one unit, and ensures the dimensional and positional accuracy of each adjusting screw hole.

[0010] Preferably, a protective sleeve is provided at the bottom center, which is integrated with the lower pressure plate; the protective sleeve is concentrically arranged with the lower pressure plate to protect the lower main shaft.

[0011] Furthermore, several reinforcing ribs are distributed around the bottom circumference; one end of each reinforcing rib is connected to the protective sleeve, and the other end is connected to the bottom of the lower pressure plate; the reinforcing ribs can enhance the structural strength of the lower pressure plate.

[0012] Preferably, a plug is fastened to the center of the convex ring to prevent coolant and foreign matter from entering the lower spindle and causing damage to the transmission structure of the lower spindle.

[0013] Furthermore, several screws are distributed around the circumference of the plug edge; these screws penetrate the plug and are threadedly connected to the circular convex ring, enabling the plug to be detachably connected and facilitating on-site assembly.

[0014] Furthermore, the top center of the plug protrudes upwards to guide the coolant flow towards the edges.

[0015] The beneficial effects of this utility model are as follows: The high installation precision pressure plate of this utility model has the following advantages: (1) The leveling screws of this utility model support the lower ball plate and adjust the height of each point on the edge of the lower ball plate to achieve leveling of the lower ball plate and ensure that the top of the lower ball plate is horizontal; the centering component ensures that the lower ball plate is concentric with respect to the convex ring. This utility model can improve the installation accuracy of the lower ball plate; (2) The outer end of the drain hole of this utility model does not exceed the arrangement area of ​​the adjusting screw hole, which can ensure that the arrangement area of ​​the adjusting screw hole is connected as one, and ensure the shape and position accuracy of each adjusting screw hole. Attached Figure Description

[0016] Figure 1 This is a top view of the high-precision pressure plate of this utility model; Figure 2 yes Figure 1 AA section view; Figure 3 yes Figure 2 A magnified view of the I-shaped image; Figure 4 yes Figure 1 BB cross-sectional view; Figure 5 This utility model relates to a three-dimensional pressure plate with high installation accuracy. Figure 1 ; Figure 6 This utility model relates to a three-dimensional pressure plate with high installation accuracy. Figure 2 ; Figure 7 This is a photograph of the actual pressure plate with high installation precision according to this utility model; In the diagram: 1. Circular convex ring, 11. Sinking groove, 2. Adjusting screw hole, 3. Leveling screw, 41. Centering seat, 411. Sinking hole, 42. Centering screw, 43. Sinking screw, 44. Anti-loosening nut, 5. Drainage elongated hole, 51. Drainage hole, 6. Protective sleeve, 7. Reinforcing rib, 8. Plug, 81. Screw. Detailed Implementation

[0017] Example 1: See Figure 1-6 A high-precision lower pressure plate has a centrally located circular protruding ring 1 that matches the inner wall of the lower ball plate, enabling it to engage with the inner wall of the lower ball plate and achieve concentricity between the lower pressure plate and the lower ball plate. Adjusting screw holes 2 are distributed around the circumference of the lower pressure plate. The adjusting screw holes 2 are threaded with leveling screws 3 arranged from bottom to top. The lengths of the leveling screws 3 extending beyond the top of the lower pressure plate vary. The ends of the leveling screws 3 abut against the bottom of the lower ball plate, supporting the lower ball plate and adjusting the height of various points along the edge of the lower ball plate to achieve concentricity between the lower pressure plate and the ball plate. The leveling ensures that the top of the lower ball plate is horizontal; several centering components are evenly installed along the edge of the circular convex ring 1; in this embodiment, there are 4 centering components; the centering components include a centering seat 41 connected to the circular convex ring 1 and a centering screw 42 arranged radially outward; the centering screw 42 is threadedly engaged with the centering seat 41 in the middle; rotating the centering screw 42 allows the centering screw 42 to extend radially outward along the lower pressure plate; the end of the centering screw 42 abuts against the inner wall of the lower ball plate, pressing the lower ball plate to ensure that the lower ball plate is concentric with respect to the circular convex ring 1.

[0018] Compared with the prior art, this utility model uses leveling screws 3 to support the lower ball plate and adjust the height of various points along the edge of the lower ball plate to achieve leveling and ensure that the top of the lower ball plate is horizontal; the centering component ensures that the lower ball plate is concentric with the circular convex ring 1. This utility model can improve the installation accuracy of the lower ball plate.

[0019] The centering assembly includes two countersunk screws 43; the centering seat 41 is convex in shape; the centering screw 42 is threaded to the top of the centering seat 41; the centering seat 41 raises the centering screw 42 to a certain height to accommodate the lifting of the lower ball plate when the leveling screw 3 levels it; the centering seat 41 has vertical countersunk holes 411 on both sides of its bottom; the countersunk screw 43 passes through the countersunk holes 411 and is threaded to the circular convex ring 1 to ensure a stable connection between the centering seat 41 and the circular convex ring 1.

[0020] The convex ring 1 has a recessed groove 11 on its edge that corresponds to the centering seat 41; the centering seat 41 is installed in the recessed groove 11, and the height of the centering seat 41 is appropriately reduced to ensure that the end of the centering screw 42 is stably pressed against the inner wall of the lower ball plate; the inner edge of the recessed groove 11 abuts against the side of the centering seat 41, which can support the centering seat 41, resist the inward movement of the centering seat 41, and improve the ability of the centering screw 42 to press against the inner wall of the lower ball plate.

[0021] The centering assembly also includes a lock nut 44; the lock nut 44 is disposed between the bolt head of the centering screw 42 and the centering seat 41; the lock nut 44 is threadedly engaged with the centering screw 42; the lock nut 44 abuts against the side of the centering seat 41; the lock nut 44 can prevent the centering screw 42 from loosening or falling off.

[0022] The top circumference is provided with radially distributed elongated drain holes 5 for draining coolant; the inner end of the elongated drain hole 5 crosses the edge of the circular convex ring 1 to receive the coolant flowing towards the center on the lower ball plate; the elongated drain hole 55 is provided with a through drain hole 51 in the middle to smoothly drain the coolant.

[0023] The outer end of the drain hole 5 does not exceed the arrangement area of ​​the adjusting screw hole 2, which can ensure that the arrangement area of ​​the adjusting screw hole 2 is connected as one, and ensure the shape and position accuracy of each adjusting screw hole 2.

[0024] A protective sleeve 6, which is integrated with the lower pressure plate, is provided at the bottom center; the protective sleeve 6 is concentrically arranged with the lower pressure plate to protect the lower main shaft.

[0025] Several reinforcing ribs 7 are distributed around the bottom circumference; one end of each reinforcing rib 7 is connected to the protective sleeve 6, and the other end is connected to the bottom of the lower pressure plate; the reinforcing rib 7 can enhance the structural strength of the lower pressure plate. In this embodiment, there are 6 reinforcing ribs 7.

[0026] A plug 8 is fastened to the center of the circular convex ring 1 to prevent coolant and foreign objects from entering the lower spindle and causing damage to the transmission structure of the lower spindle.

[0027] Several screws 81 are distributed around the circumference of the plug 8; the screws 81 penetrate the plug 8 and are threadedly connected to the circular convex ring 1, realizing the detachable connection of the plug 8 and facilitating on-site assembly. In this embodiment, there are 6 screws 81.

[0028] The working principle of this embodiment is as follows: The circular convex ring 1 can clamp the inner wall of the lower ball plate, achieving concentricity between the lower pressure plate and the lower ball plate; the leveling screws 3 extend beyond the top of the lower pressure plate to different lengths, supporting the lower ball plate and adjusting the height of various points along the edge of the lower ball plate to achieve leveling and ensure that the top of the lower ball plate is horizontal; rotating the centering screw 42 allows the centering screw 42 to extend radially outward along the lower pressure plate; the centering screw 42 tightens against the lower ball plate, ensuring that the lower ball plate is concentric with respect to the circular convex ring 1; the anti-loosening nut 44 prevents the centering screw 42 from loosening or falling off; the drain hole 5 is used to drain the coolant; the drain hole 51 smoothly drains the coolant; the outer end of the drain hole 5 does not exceed the arrangement area of ​​the adjusting screw hole 2, ensuring that the arrangement area of ​​the adjusting screw hole 2 is connected as one unit, and ensuring the dimensional accuracy of each adjusting screw hole 2. The reinforcing rib 7 can strengthen the structural strength of the lower pressure plate; the plug 8 prevents coolant and foreign objects from entering the lower spindle and causing damage to the transmission structure of the lower spindle.

[0029] Example 2: Example 2 is basically the same as Example 1, and the similarities will not be repeated. The difference is that the top center of the plug 8 protrudes upward to guide the coolant to flow to the edge.

[0030] The plug 8 is a stamped product, which is easy to manufacture.

Claims

1. A high-precision lower pressure plate, wherein a centrally located circular protrusion ring matches the inner wall of a lower ball plate; characterized in that, The lower pressure plate has adjusting screw holes distributed around its circumference; the adjusting screw holes are threaded with leveling screws arranged from bottom to top; the end of the leveling screw abuts against the bottom of the lower ball plate; several centering components are evenly installed along the edge of the convex ring; the centering components include a centering seat connected to the convex ring and a centering screw arranged radially outward; the middle part of the centering screw is threaded with the centering seat; the end of the centering screw abuts against the inner wall of the lower ball plate.

2. The high-precision pressure plate according to claim 1, characterized in that: The centering assembly includes two countersunk screws; the centering seat is convex in shape; the centering screws are threaded to the top of the centering seat; vertical countersunk holes are provided on both sides of the bottom of the centering seat; the countersunk screws pass through the countersunk holes and are threaded to the circular convex ring.

3. The high-precision pressure plate according to claim 2, characterized in that: The convex ring has a recessed groove on its edge that corresponds to the centering seat; the centering seat is installed in the recessed groove; the inner edge of the recessed groove abuts against the side of the centering seat.

4. The high-precision pressure plate according to claim 2, characterized in that: The centering assembly also includes a lock nut; the lock nut is disposed between the bolt head of the centering screw and the centering seat; the lock nut is threadedly engaged with the centering screw; the lock nut abuts against the side of the centering seat.

5. The high-precision pressure plate according to claim 1, characterized in that: The top circumference is provided with radially distributed elongated drainage holes; the inner end of the elongated drainage hole crosses the edge of the circular convex ring; and a through drainage hole is provided in the middle of the elongated drainage hole.

6. The high-precision pressure plate according to claim 5, characterized in that: The outer end of the drain hole should not exceed the area where the adjusting screw hole is located.

7. The high-precision pressure plate according to claim 1, characterized in that: A protective sleeve is provided at the bottom center, which is integrated with the lower pressure plate; the protective sleeve is concentrically arranged with the lower pressure plate.

8. The high-precision pressure plate according to claim 7, characterized in that: Several reinforcing ribs are distributed around the bottom circumference; one end of each reinforcing rib is connected to the protective sleeve, and the other end is connected to the bottom of the lower pressure plate.

9. The high-precision pressure plate according to claim 1, characterized in that: A plug is fastened to the center of the convex ring.

10. The high-precision pressure plate according to claim 9, characterized in that: Several screws are distributed around the circumference of the plug; the screws penetrate the plug and are threadedly connected to the circular convex ring.

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