A hydraulic press pressure protection device

Abstract

The present invention discloses an anti-pressure device for a hydraulic press, comprising a device body, a movable column, a movable inclined block and a compression spring; the device body is fixedly arranged in the longitudinal direction, a longitudinal slide groove is provided in the longitudinal direction on the device body, a transverse slide groove is provided in the transverse direction on the device body, the movable column is slidably arranged in the longitudinal direction in the vertical slide groove, the movable inclined block is slidably arranged in the transverse slide groove in the transverse direction, a limiting groove is provided on the movable column, the movable inclined block can enter and exit the limiting groove, and is used to limit the movable column from sliding downward; the compression spring is arranged between the device body and the movable column, and forces the movable column to slide upward. The device has the advantages of being able to perform mechanical protection, simple structure, and safe and reliable.

Description

Technical Field

[0001] The present invention relates to the technical field of safety equipment, in particular to safety equipment for hydraulic presses. Background Art

[0002] A press (also known as an oil press, hydraulic press, etc.) is a versatile press with an ingenious structure. It has a wide range of uses and high production efficiency. It can be widely used in cutting, punching, blanking, bending, riveting and forming processes. It processes metal blanks into parts by applying strong pressure to them to cause plastic deformation and fracture.

[0003] Since the impact force of the press is huge, safety protection is particularly important. Most of the current presses use protection devices such as light curtain sensors, but there are device reliability issues when using electronic components such as sensors. Moreover, they are passive safety protection devices, which are easily disturbed by the outside world and cannot reliably play a safety protection role.

[0004] Therefore, how to improve the existing protective device of the press to overcome the above problems is an urgent problem to be solved by those skilled in the art. Summary of the invention

[0005] The object of the present invention is to provide a hydraulic press pressure protection device which can perform mechanical protection and has a simple structure and is safe and reliable.

[0006] In order to achieve the above purpose, the technical solution adopted by the present invention is: an anti-pressure device for a hydraulic press, characterized in that: it includes a device body, a movable column, a movable bevel block and a compression spring; the device body is fixedly arranged along the longitudinal direction, a longitudinal slide groove is opened on the device body along the longitudinal direction, and a transverse slide groove is opened on the device body along the transverse direction, the movable column is slidably arranged in the longitudinal slide groove along the longitudinal direction, the movable bevel block is slidably arranged in the transverse slide groove along the transverse direction, a limiting groove is opened on the movable column, and the movable bevel block can enter and exit the limiting groove to limit the movable column from sliding downward; the compression spring is arranged between the device body and the movable column, and forces the movable column to slide upward.

[0007] Further, a first inclined surface is provided at the top of the limiting groove; the movable inclined block has a high and low step surface, and the upper end surface of the movable inclined block is provided with a second inclined surface in a high position, a third inclined surface in a low position, and a fourth inclined surface connecting the second inclined surface and the third inclined surface; the first inclined surface, the second inclined surface, the third inclined surface and the fourth inclined surface are all inclined from top to bottom along the direction in which the movable inclined block enters the limiting groove, and the first inclined surface, the second inclined surface and the third inclined surface are parallel, and the inclination angle of the fourth inclined surface is greater than the inclination angles of the first inclined surface, the second inclined surface and the third inclined surface;

[0008] When the second inclined plane is below the first inclined plane, the movable inclined block limits the movable column from sliding downward; when the third inclined plane is below the first inclined plane, the movable column can slide downward; and when the movable inclined block enters the limiting groove in the horizontal direction, it can push the movable column to slide upward from the third inclined plane along the fourth inclined plane and reach the second inclined plane.

[0009] As an improvement, a first rounded corner is provided at the upper end of the first inclined surface, a second rounded corner is provided between the second inclined surface and the fourth inclined surface, and a third rounded corner is provided between the third inclined surface and the fourth inclined surface. The provision of multiple rounded corners makes the sliding between the movable column and the movable inclined block smoother, and avoids the two from getting stuck.

[0010] As an improvement, the anti-pressure device further comprises a power component, and the power component pushes the movable inclined block to slide in the lateral direction, thereby reducing manual operation and improving the automation degree of the device.

[0011] Specifically, the power component includes a cylinder barrel, a cylinder piston and a connecting rod; the anti-pressure device also includes a cylinder fixing plate, which is fixedly arranged in the longitudinal direction and extends to the height of the transverse slide groove; the cylinder barrel is fixedly arranged on the cylinder fixing plate, the cylinder piston is slidably arranged in the cylinder barrel, one end of the connecting rod is fixedly arranged on the cylinder piston, and the other end of the connecting rod is connected to the movable inclined block; the cylinder piston moves in the cylinder barrel, and the movable inclined block is pushed to slide in the transverse direction by the connecting rod. The cylinder is a commonly used power component, and has a simple structure and is easy to control, and is suitable as a power component of this device.

[0012] As an improvement, a T-shaped slider is fixedly provided at the other end of the connecting rod, a T-shaped slot is provided on the side of the movable inclined block, the T-shaped slider is slidably arranged in the T-shaped slot along the longitudinal direction, and the connecting rod is connected to the movable inclined block through the T-shaped slider. The sliding cooperation of the T-shaped slider and the T-shaped slot, on the one hand, fixes the connecting rod and the movable inclined block in the transverse direction, so that the connecting rod can drive the movable inclined block to slide in the transverse direction, and on the other hand, enables the connecting rod and the movable inclined block to have a degree of freedom in the longitudinal direction, which is used to eliminate the processing and cooperation errors of the power component and the movable inclined block and improve the fault tolerance rate.

[0013] As a further improvement, the power component further includes an electromagnetic sensor, which is arranged on the cylinder barrel and is used to feedback the active position of the cylinder piston, thereby further improving the degree of automation and displaying various states of the device to serve as a warning reminder.

[0014] As an improvement, the anti-pressure device further comprises a tooling base plate, the device body and the cylinder fixing plate are both fixedly arranged on the tooling base plate, and the tooling base plate is fixedly arranged on the hydraulic press. The setting of the tooling base plate makes the whole device integrated, which is convenient for transportation and installation; in addition, the tooling base plate can be fixed on the hydraulic press by welding, screw connection and other methods.

[0015] As a further improvement, an adjusting column is provided at the top of the movable column, and the adjusting column is movable in the longitudinal direction to adjust the overall height of the anti-pressure device. The adjusting column can adjust the height of the device according to the mold to ensure that the movable column is not higher than the mold height when pressed down to the lowest point.

[0016] Preferably, a threaded hole is provided at the upper end of the movable column, a threaded rod is provided at the lower end of the adjusting column, the adjusting column is threadedly connected to the movable column through the cooperation of the threaded rod and the threaded hole, and the rotation of the adjusting column can be used to adjust the overall height of the anti-pressure device; an operating hole is provided along the upper side of the adjusting column in the horizontal direction. The threaded connection is simple and reliable, and can realize longitudinal adjustment; the operating hole is convenient for inserting tools such as screwdrivers to rotate the adjusting column.

[0017] Compared with the prior art, the advantages of the present invention are: the present device utilizes a mechanical structure to limit the downward pressure of the movable column through the movable inclined block, which can effectively prevent accidental mold closing when the hydraulic press is closed and eliminates safety hazards. In addition, when the hydraulic press is closed, the movable column of the present device can move freely, thereby not affecting the normal operation of the hydraulic press. Moreover, the present device has a simple structure and is safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural schematic diagram according to a preferred embodiment of the present invention, and shows a local enlarged view of the electromagnetic sensor.

[0019] Figure 2 is an exploded view of a preferred embodiment according to the present invention.

[0020] Figure 3 It is a half-section view of a preferred embodiment according to the present invention, which is in a raised state.

[0021] Figure 4 It is a half-section view of a preferred embodiment according to the present invention, which is in a pressed state.

[0022] Figure 5 It is a half-section view of a movable column according to a preferred embodiment of the present invention, and shows a partial enlarged view of the first fillet.

[0023] Figure 6 It is a half-section view of a movable inclined block according to a preferred embodiment of the present invention.

[0024] Figure 7 It is a movable inclined block according to a preferred embodiment of the present invention, and identifies the angles of the second inclined plane, the third inclined plane and the fourth inclined plane. DETAILED DESCRIPTION

[0025] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0026] In the description of the present invention, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like, indicating directions and positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of narrating the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and should not be understood as limiting the specific scope of protection of the present invention.

[0027] like Figures 1 to 7 As shown, a preferred embodiment of the present invention includes a device body 2, a movable column 4, a movable bevel block 6 and a compression spring 5; the device body 2 is fixedly arranged in the longitudinal direction, a longitudinal slide groove 21 is opened in the longitudinal direction on the device body 2, and a transverse slide groove 22 is opened in the transverse direction on the device body 2, the movable column 4 is slidably arranged in the longitudinal slide groove 21 in the longitudinal direction, the movable bevel block 6 is slidably arranged in the transverse slide groove 22 in the transverse direction, a limiting groove 41 is opened on the movable column 4, and the movable bevel block 6 can enter and exit the limiting groove 41 to limit the movable column 4 from sliding downward; the compression spring 5 is arranged between the device body 2 and the movable column 4, and forces the movable column 4 to slide upward.

[0028] More specifically, the top of the limit groove 41 is provided with a first inclined surface 42; the movable inclined block 6 has a high and low step surface, and the upper end surface of the movable inclined block is provided with a second inclined surface 61 at a high position, a third inclined surface 62 at a low position, and a fourth inclined surface 63 connecting the second inclined surface 61 and the third inclined surface 62; the first inclined surface 42, the second inclined surface 61, the third inclined surface 62 and the fourth inclined surface 63 are all inclined from top to bottom along the direction in which the movable inclined block 6 enters the limit groove 41, and the first inclined surface 42, the second inclined surface 61 and the third inclined surface 62 are parallel, and the inclination angle of the fourth inclined surface 63 is greater than the inclination angles of the first inclined surface 42, the second inclined surface 61 and the third inclined surface 62. Figure 7The first inclined plane 42, the second inclined plane 61 and the third inclined plane 62 have an inclination angle of α, and in this embodiment, α=10°. The fourth inclined plane 63 has an inclination angle of β, and in this embodiment, β=75°. The above parameters are obtained based on force analysis and after multiple tests, and can better realize the function of the device.

[0029] When the second inclined surface 61 is below the first inclined surface 62, the movable inclined block 6 limits the movable column 4 from sliding downward; when the third inclined surface 62 is below the first inclined surface 62, the movable column 6 can slide downward; and when the movable inclined block 6 enters the limiting groove 41 laterally, it can push the movable column 4 from the third inclined surface 62, slide upward along the fourth inclined surface 63, and reach the second inclined surface 61.

[0030] The above-mentioned multiple inclined planes have the following functions:

[0031] (1) It is convenient for the cylinder piston to be inserted when it is pushed forward, and it can prevent the movable bevel block from hitting the movable column and causing interference.

[0032] (2) When pressing down, if the cylinder piston does not return to its proper position, it can be squeezed back out through the fourth inclined surface.

[0033] (3) When a power component fails, the hydraulic press is pressed down, and the anti-pressure device is still in the rising anti-pressure state. When the force (the force is the resultant force of multiple forces) borne by the second inclined surface is greater than the resistance, the movable inclined block pushes the cylinder piston backward, which can forcibly press back the anti-pressure device to prevent the equipment from being damaged due to overpressure.

[0034] In order to make the movement smoother, a first rounded corner 43 is provided at the upper end of the first inclined surface 42 , a second rounded corner 64 is provided between the second inclined surface 61 and the fourth inclined surface 63 , and a third rounded corner 65 is provided between the third inclined surface 62 and the fourth inclined surface 63 .

[0035] In order to improve the degree of automation, the present embodiment is provided with a power component 7, which pushes the movable inclined block 6 to slide in the horizontal direction. Specifically, the power component 7 includes a cylinder barrel 71, a cylinder piston 72 and a connecting rod 73; the anti-pressure device also includes a cylinder fixing plate 3, which is fixedly arranged in the longitudinal direction and extends to the height of the horizontal slide groove 22; the cylinder barrel 71 is fixedly arranged on the cylinder fixing plate 3, the cylinder piston 72 is slidably arranged in the cylinder barrel 71, one end of the connecting rod 73 is fixedly arranged on the cylinder piston 72, and the other end of the connecting rod 73 is connected to the movable inclined block 6; the cylinder piston 72 moves in the cylinder barrel 71, and pushes the movable inclined block 6 to slide in the horizontal direction through the connecting rod 73. Among them, a T-shaped slider 74 is fixedly arranged at the other end of the connecting rod 73, and a T-shaped slide groove 66 is opened on the side of the movable inclined block 6. The T-shaped slider 74 is slidably arranged in the T-shaped slide groove 66 in the longitudinal direction, and the connecting rod 73 is connected to the movable inclined block 6 through the T-shaped slider 74. Furthermore, the power component 7 also includes an electromagnetic sensor 75 , which is arranged on the cylinder barrel 71 and is used to feedback the active position of the cylinder piston 72 .

[0036] For the integrity of the device, the anti-pressure device also includes a tooling base plate 1, the device body 2 and the cylinder fixing plate 3 are both fixedly arranged on the tooling base plate 1, and the tooling base plate 1 is fixedly arranged on the hydraulic press.

[0037] In addition, an adjusting column 8 is provided at the top of the movable column 4, and the adjusting column 8 can move longitudinally to adjust the overall height of the anti-pressure device. A threaded hole 44 is provided at the upper end of the movable column 4, and a threaded rod 81 is provided at the lower end of the adjusting column 8. The adjusting column 8 is threadedly connected to the movable column 4 through the cooperation of the threaded rod 81 and the threaded hole 44. The adjusting column 8 can be rotated to adjust the overall height of the anti-pressure device; an operating hole 82 is provided horizontally on the upper edge of the adjusting column 8.

[0038] The working principle of this embodiment is as follows:

[0039] Rising anti-pressure state: When the hydraulic press is shut down with the mold opened, the anti-pressure device is in the following state: Figure 3 As shown, the movable inclined block is pushed forward to clamp the movable column, limiting the movable column from sliding downward, thereby preventing the press from sliding down to close the mold due to a malfunction.

[0040] Pressing free state: When the hydraulic press is working (i.e. pressing down to close the mold), the state of the anti-pressure device is as follows: Figure 4 As shown, the movable inclined block retreats, and the hydraulic press can work normally at this time. When the mold is pressed down, the movable column is pressed down at the same time (Note: when the movable column slides to the lowest point, it must be more than 5mm lower than the mold).

[0041] It is worth mentioning that, since this embodiment adopts a cylinder device and an electromagnetic sensor is provided, the anti-pressure device can be controlled by the electrical system and can automatically switch between the rising anti-pressure state and the downward free state according to the state of the hydraulic press.

[0042] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A hydraulic press pressure protection device, characterized in that: The invention comprises a device body, a movable column, a movable inclined block and a compression spring; the device body is fixedly arranged in the longitudinal direction, a longitudinal slide groove is provided in the longitudinal direction on the device body, a transverse slide groove is provided in the transverse direction on the device body, the movable column is slidably arranged in the longitudinal slide groove in the longitudinal direction, the movable inclined block is slidably arranged in the transverse slide groove in the transverse direction, a limiting groove is provided on the movable column, the movable inclined block can enter and exit the limiting groove, and is used to limit the movable column from sliding downward; the compression spring is arranged between the device body and the movable column, and forces the movable column to slide upward; The top of the limiting groove is provided with a first inclined surface; the movable inclined block has a high and low step surface, and the upper end surface of the movable inclined block is provided with a second inclined surface in a high position, a third inclined surface in a low position, and a fourth inclined surface connecting the second inclined surface and the third inclined surface; the first inclined surface, the second inclined surface, the third inclined surface and the fourth inclined surface are all inclined from top to bottom along the direction in which the movable inclined block enters the limiting groove, and the first inclined surface, the second inclined surface and the third inclined surface are parallel, and the inclination angle of the fourth inclined surface is greater than the inclination angles of the first inclined surface, the second inclined surface and the third inclined surface; When the second inclined plane is below the first inclined plane, the movable inclined block limits the movable column from sliding downward; when the third inclined plane is below the first inclined plane, the movable column can slide downward; and when the movable inclined block enters the limiting groove in the horizontal direction, it can push the movable column to slide upward from the third inclined plane along the fourth inclined plane and reach the second inclined plane.

2. The hydraulic press pressure protection device according to claim 1, characterized in that: A first rounded corner is disposed on the upper end of the first inclined surface, a second rounded corner is disposed between the second inclined surface and the fourth inclined surface, and a third rounded corner is disposed between the third inclined surface and the fourth inclined surface.

3. The hydraulic press pressure protection device according to claim 1, characterized in that: The anti-pressure device also includes a power component, which pushes the movable inclined block to slide in the lateral direction.

4. The hydraulic press pressure protection device according to claim 3, characterized in that: The power component includes a cylinder barrel, a cylinder piston and a connecting rod; the anti-pressure device also includes a cylinder fixing plate, which is fixedly arranged in the longitudinal direction and extends to the height of the transverse sliding groove; the cylinder barrel is fixedly arranged on the cylinder fixing plate, the cylinder piston is slidably arranged in the cylinder barrel, one end of the connecting rod is fixedly arranged on the cylinder piston, and the other end of the connecting rod is connected to the movable inclined block; the cylinder piston moves in the cylinder barrel, and the movable inclined block is pushed to slide in the transverse direction through the connecting rod.

5. The hydraulic press pressure protection device according to claim 4, characterized in that: A T-shaped slider is fixedly provided at the other end of the connecting rod, a T-shaped slide groove is provided on the side of the movable inclined block, the T-shaped slider is longitudinally slidably arranged in the T-shaped slide groove, and the connecting rod is connected to the movable inclined block via the T-shaped slider.

6. The anti-pressure device for a hydraulic press according to claim 5, characterized in that: The power component also includes an electromagnetic sensor, which is arranged on the cylinder barrel and is used to feedback the active position of the cylinder piston.

7. The hydraulic press pressure protection device according to claim 4, characterized in that: The anti-pressure device also includes a tooling bottom plate, the device body and the cylinder fixing plate are both fixedly arranged on the tooling bottom plate, and the tooling bottom plate is fixedly arranged on the hydraulic press.

8. The hydraulic press pressure protection device according to claim 1, characterized in that: An adjusting column is arranged at the top end of the movable column, and the adjusting column can move in the longitudinal direction to adjust the overall height of the anti-pressure device.

9. The anti-pressure device for a hydraulic press according to claim 8, characterized in that: A threaded hole is provided at the upper end of the movable column, and a threaded rod is provided at the lower end of the adjusting column. The adjusting column is threadedly connected to the movable column through the cooperation of the threaded rod and the threaded hole. The rotation of the adjusting column can be used to adjust the overall height of the anti-pressure device; an operating hole is provided in the horizontal direction along the upper edge of the adjusting column.

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