Locking mechanism for a press

Abstract

A locking mechanism for a press includes a column, an upper crossbeam, a stud, a nut seat, an inner expansion sleeve, and an outer expansion sleeve. The column passes through the upper crossbeam, and a cavity is provided on the upper crossbeam at the lower connection point between the column and the upper crossbeam. The stud is sleeved on the outside of the column and is threadedly connected to the nut seat. The inner expansion sleeve is sleeved on the outside of the column, with a conical upper part and its bottom surface in contact with the stud. The outer expansion sleeve is installed in a hole in the upper crossbeam and sleeved on the outside of the inner expansion sleeve. A conical hole is provided inside the outer expansion sleeve, located outside the cone and movable relative to the cone. Rotating the stud causes the cone to move upward and tighten with the conical hole, thus tightening the upper crossbeam and the column. Rotating the stud away from the inner expansion sleeve causes the cone to move downward and away from the conical hole, thus loosening the upper crossbeam and the column. This locking mechanism enables the column and the lower end of the upper crossbeam to be tightly connected during operation, eliminating radial clearance between the column and the upper crossbeam and improving equipment accuracy.

Description

Technical Field

[0001] This utility model relates to a mechanism of a press, and more particularly to a locking mechanism of a press. Background Technology

[0002] Existing presses have radial clearance at the connection between the column and the lower part of the upper crossbeam. During actual operation, the upper crossbeam may wobble, which reduces the overall rigidity of the press and affects the accuracy of the equipment. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to overcome the above-mentioned defects of the prior art and provide a locking mechanism for a press that can eliminate the radial gap at the connection between the column and the lower part of the upper crossbeam.

[0004] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: A locking mechanism for a press includes a column, an upper crossbeam, a stud, a nut seat, an inner expansion sleeve, and an outer expansion sleeve. The column passes through the upper crossbeam, and a cavity is provided on the upper crossbeam at the lower connection point between the column and the upper crossbeam. The stud is sleeved on the outside of the column and is threadedly connected to the nut seat. The inner expansion sleeve is sleeved on the outside of the column, and its upper part is a cone with its bottom surface in contact with the stud. The outer expansion sleeve is installed in a hole in the upper crossbeam and sleeved on the outside of the inner expansion sleeve. A conical hole is provided in the outer expansion sleeve, located outside the cone and movable relative to the cone. When the stud is rotated, the cone moves upward and tightens with the conical hole, thus tightening the upper crossbeam and the column. When the stud is rotated away from the inner expansion sleeve, the cone moves downward and away from the conical hole, thus loosening the upper crossbeam and the column.

[0005] Better yet, the outer expansion sleeve has several spring holes along its circumference, with the spring holes facing the bottom surface of the inner expansion sleeve. The spring is located inside the spring holes, with its upper end limited by the upper part of the spring hole and its lower end limited by the bottom surface of the inner expansion sleeve. When the stud is rotated to make the cone move upward until it is tightened with the cone hole, thus tightening the upper crossbeam and the column, the spring is pressed. When the stud is rotated away from the cone, the spring releases its elastic force, causing the cone to leave the cone hole. In this way, the elastic force of the spring can make the inner expansion sleeve leave the outer expansion sleeve better and faster.

[0006] Even better, a bearing is placed between the inner expansion sleeve and the stud, which allows the stud to be rotated easily and effortlessly to change its vertical position relative to the nut seat.

[0007] Even better, a force-applying rod is also provided, one end of which is bolted to the stud. Rotating the force-applying rod can drive the stud to rotate and change the stud's vertical position relative to the nut seat, which saves more effort.

[0008] Better yet, the force-applying rod is driven to rotate by a drive mechanism.

[0009] More specifically, the driving mechanism is a cylinder, and the piston rod of the cylinder is hinged to the force-applying rod and drives the force-applying rod to rotate.

[0010] Better still, there are two cylinders, one end of the cylinder body of each cylinder is hinged to a force-applying rod, and one end of the piston rod of each cylinder is hinged to the other force-applying rod.

[0011] Even better, a limiting block is also installed on the stud along the rotation path of the force-applying rod to limit the rotation position of the force-applying rod.

[0012] Compared with the prior art, the advantages of this utility model are: a locking mechanism is added at the connection between the column and the lower part of the upper crossbeam, so that the column and the lower end of the upper crossbeam can be tightly connected during operation, eliminating the radial gap between the column and the upper crossbeam, improving the accuracy of the equipment, and also being able to withstand a part of the axial force, thereby improving the rigidity of the press as a whole. Attached Figure Description

[0013] Figure 1 This is a cross-sectional structural schematic diagram of a locking mechanism for a press according to an embodiment of the present invention.

[0014] Figure 2 for Figure 1 A magnified structural diagram of point A in the middle.

[0015] Figure 3 This is a bottom view of the locking mechanism of a press installed on the upper crossbeam in this embodiment. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] like Figure 1 , Figure 2 , Figure 3 As shown, a locking mechanism for a press includes: a column 1, an upper crossbeam 2, a stud 3, a nut seat 4, a bearing 5, an inner expansion sleeve 6, a spring 7, an outer expansion sleeve 8, and a force-applying rod 9.

[0018] The column 1 passes through the upper crossbeam 2, and a cavity 21 is provided on the upper crossbeam at the lower connection point between the column 1 and the upper crossbeam.

[0019] The stud 3 is fitted over the column 1 and has external threads. The nut seat 4 is fitted over the stud 3 and fixed to the upper crossbeam 2 by screws 41. The nut seat 4 has internal threads and is threadedly connected to the external threads of the stud 3.

[0020] The inner expansion sleeve 6 is fitted over the column 1. The upper part of the inner expansion sleeve 6 is a cone 601, and it is also provided with a bottom surface 602. The bottom surface 602 is directly connected to the stud 3 or to the bearing 5.

[0021] The outer expansion sleeve 8 is installed in the cavity 21 of the upper crossbeam 2 and sleeved outside the inner expansion sleeve 6. A conical hole 802 is provided in the outer expansion sleeve 8. The conical hole 802 is located outside the cone 601 and can move relative to the cone 601 of the inner expansion sleeve 6. When the cone 601 moves upward, it expands tightly with the conical hole 802, thereby expanding the upper crossbeam 2 and the column 1. When the cone 601 moves downward, it leaves the conical hole 802, thereby loosening the upper crossbeam 2 and the column 1.

[0022] The outer expansion sleeve 8 has several evenly distributed spring holes 801 along its circumference, with the spring holes 801 facing the bottom surface 602 of the inner expansion sleeve 6.

[0023] The spring 7 is located inside the spring hole 801, with its upper end limited by the upper part of the spring hole 801 and its lower end limited by the bottom surface 602 of the inner expansion sleeve 6.

[0024] One end of the force-applying rod 9 is mounted on the stud 3 by a bolt 91. Rotating the force-applying rod 9 can drive the stud 3 to rotate and change the vertical position of the stud 3 relative to the nut seat 4.

[0025] When using the locking device, rotate the force-applying rod 9 to move the stud 3 upward within the nut seat, gradually pressing against the inner expansion sleeve 6 and moving it upward until it presses against the outer expansion sleeve 8 and can no longer move upward. In this way, the upper crossbeam 2 is locked with the column 1, eliminating the radial gap between the two, preventing the upper crossbeam from shaking, and improving the accuracy of the equipment. At this time, the spring 7 is compressed; the stud 3 moves downward, gradually moving away from the inner expansion sleeve 6, and the elastic force of the spring 7 is released, pushing the inner expansion sleeve 6 downward, so that the upper crossbeam 2 is released from the column 1.

[0026] In this embodiment, a bearing 5 is provided between the inner expansion sleeve 6 and the stud 3, so that the stud 3 can be rotated conveniently and effortlessly, thereby changing the vertical position of the stud 3 relative to the nut seat 4.

[0027] A limiting block 10 is also installed on the stud 3 along the rotation path of the force-applying rod 9 to limit the rotation position of the force-applying rod 9 and prevent the stud 3 from exiting the nut seat 4 too much when the inner expansion sleeve 6 is loosened.

[0028] The force-applying rod 9 can be rotated manually or automatically by a drive mechanism.

[0029] like Figure 3 As shown, the driving mechanism is a cylinder 11. One end of the cylinder body of the cylinder 11 is hinged to a force-applying rod 9, and one end of the piston rod of the cylinder 11 is hinged to another force-applying rod 9. In this way, the extension and retraction of the piston rod of the cylinder 11 can simultaneously control the rotation of the two force-applying rods 9, thereby rotating the two studs 3, so that the inner expansion sleeve 6 and the outer expansion sleeve 8 are tightened or loosened.

[0030] There are two cylinders 11, and the other cylinder 11 controls the rotation of the other two force rods 9. Figure 3The left side shows the state of cylinder 11 when the inner expansion sleeve 6 is tightened, and the right side shows the state of cylinder 11 when the inner expansion sleeve 6 is loosened.

Claims

1. A locking mechanism for a press, characterized by: The device includes a column, an upper crossbeam, a stud, a nut seat, an inner expansion sleeve, and an outer expansion sleeve. The column passes through the upper crossbeam, and a cavity is provided on the upper crossbeam at the lower connection point between the column and the upper crossbeam. The stud is fitted over the column and is threadedly connected to the nut seat. The inner expansion sleeve is fitted over the column, and its upper part is a cone with its bottom surface in contact with the stud. The outer expansion sleeve is installed in a hole in the upper crossbeam and fitted over the inner expansion sleeve. A conical hole is provided inside the outer expansion sleeve, located outside the cone and movable relative to the cone. Rotating the stud causes the cone to move upward until it is tight with the conical hole, thus tightening the upper crossbeam and the column. Rotating the stud away from the inner expansion sleeve causes the cone to move downward away from the conical hole, thus loosening the upper crossbeam and the column.

2. The locking mechanism of claim 1, wherein: The outer expansion sleeve has several spring holes along its circumference, with the spring holes facing the bottom surface of the inner expansion sleeve. The spring is located inside the spring hole, with its upper end limited by the upper part of the spring hole and its lower end limited by the bottom surface of the inner expansion sleeve. When the stud is rotated to make the cone move upward until it is tightened with the cone hole, thus tightening the upper crossbeam and the column, the spring is pressed. When the stud is rotated away from the cone, the spring releases its elastic force, causing the cone to leave the cone hole.

3. The locking mechanism of claim 1, wherein: A bearing is provided between the inner expansion sleeve and the stud.

4. The locking mechanism of claim 1, wherein: A force-applying rod is also provided, one end of which is bolted to the stud. Rotating the force-applying rod can drive the stud to rotate and change the vertical position of the stud relative to the nut seat.

5. The locking mechanism of claim 4, wherein: A limiting block is also installed on the stud along the rotation path of the force-applying rod to restrict the rotation position of the force-applying rod.

6. The locking mechanism of claim 4, wherein: The force-applying rod is driven to rotate by a drive mechanism.

7. The locking mechanism of claim 6, wherein: The driving mechanism is a cylinder, and the piston rod of the cylinder is hinged to the force rod and drives the force rod to rotate.

8. The locking mechanism of claim 7, wherein: The cylinder has two parts. One end of the cylinder body of each cylinder is hinged to a force-applying rod, and one end of the piston rod of each cylinder is hinged to the other force-applying rod.

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