Slide-down protection device for slide block of hydraulic machine

Abstract

The utility model discloses a hydraulic machine sliding block gliding protection device, and belongs to the technical field of hydraulic machine operation safety. The hydraulic machine sliding block gliding protection device comprises a safety pin plate, a sliding limiting rod and a pushing mechanism, and the pushing mechanism is fixed to an oil cylinder or the side face of an upper workbench and fixedly connected with the safety pin plate through an air cylinder telescopic rod of the pushing mechanism; the bottom end of the slide limiting rod is fixed on the upper surface of the slide block beside the oil cylinder piston rod; after the piston rod of the oil cylinder drives the sliding block to vertically ascend to a set position, the pushing mechanism transversely pushes the safety pin plate to lock and fix the top end of the sliding limiting rod, and then the technical problem that the sliding block fixedly connected with the bottom end of the sliding limiting rod is out of control and slides down is solved.

Description

Technical Field

[0001] The invention relates to the field of hydraulic press operation safety, and more specifically to a hydraulic press slide block downward protection device. Background Art

[0002] Hydraulic press is suitable for stamping, die forging, press fitting, straightening and other processes; the movable workbench used by hydraulic press to press products is also called a slide block. The cylinder of the hydraulic press is fixedly connected to the slide block through its piston rod. The piston rod drives the slide block to move up and down. When the slide block is in the upper position, a high space will be left below it for personnel or auxiliary equipment operation. At this time, the slide block cannot slide down out of control. Once it slides down out of control, it will injure people or damage equipment. Existing methods to prevent sliding down:

[0003] 1. When the slider slides down uncontrollably and slides to a preset electrical signaling position, the electrical program starts, the oil pump is started, and the slider is pushed up again to return to the starting position of the slide;

[0004] 2. Place a wooden pier under the slider. When the slider slides down out of control, it will hit the wooden pier first, reducing the risk of hitting the operator and other supporting equipment such as the mold.

[0005] Adopting the above-mentioned electrical control program, power off, cutting off the hydraulic control oil circuit or wooden pier, etc., can only solve the uncontrolled sliding caused by a small part of the reasons, and it is difficult to absolutely avoid the uncontrolled sliding of the slider.

[0006] After searching, the patent application with patent announcement number CN218640406U and publication date 2023.03.17 discloses a self-locking assembly of a slider of a servo hydraulic press, including: a servo hydraulic press body, a slider body is slidably installed inside the servo hydraulic press body; a locking mechanism, a locking mechanism for locking the slider body is installed on both sides of the servo hydraulic press body; by setting the locking mechanism, when the slider body is locked, the servo motor drives the active bevel gear to rotate, and the meshing connection between the active bevel gear and the driven bevel gear drives the transmission screw to rotate, and then the threaded connection between the transmission screw and the connecting seat drives the limit tooth plate to move horizontally and mesh with the limit teeth, so as to automatically lock the slider body and prevent the slider body from sliding and falling. This utility model patent locks the slider through the meshing connection of the gears, but the gears have the risk of slipping after long-term fatigue use, and it is still difficult to absolutely avoid the slider from sliding out of control. Summary of the invention

[0007] 1. Technical problem to be solved by the invention

[0008] In view of the problem of safety risks caused by the uncontrolled sliding of the hydraulic press slider in the prior art, the present invention provides a hydraulic press slider sliding protection device. Through the coordinated cooperation of a safety pin plate, a sliding limit rod and a pushing mechanism, when the slider rises, the top of the sliding limit rod is locked by the safety pin plate, thereby achieving the purpose of preventing the slider fixedly connected to the sliding limit rod from sliding down.

[0009] 2. Technical solution

[0010] In order to achieve the above object, the technical solution provided by the present invention is:

[0011] A hydraulic press slide protection device comprises a safety pin plate, a slide limit rod and a pushing mechanism, wherein the pushing mechanism is fixed to the side of an oil cylinder or an upper workbench and is fixedly connected to the safety pin plate through its telescopic rod; the bottom end of the slide limit rod is fixed to the upper surface of the slide block beside the oil cylinder piston rod; when the oil cylinder piston rod drives the slide block to rise vertically, the pushing mechanism pushes the safety pin plate horizontally to lock and fix the top end of the slide limit rod, thereby achieving the technical effect of preventing the slide block fixedly connected to the bottom end of the slide limit rod from sliding down.

[0012] A further hydraulic press slide downward protection device also includes an upper fixed plate and a slide plate; the upper fixed plate is laterally fixed to the side of the oil cylinder or the upper workbench; the pushing mechanism and the slide plate are both fixed to the surface of the upper fixed plate, and the safety pin plate is slidably connected to the surface of the slide plate. The locking action of the safety pin plate on the top of the slide limit rod is more labor-saving, and can also avoid excessive wear of the safety pin plate and increase its service life.

[0013] A further hydraulic press slide downward protection device has guide blocks fixed on both sides of the slide, and a safety pin plate is slidably connected between the two guide blocks. The spacing between the two guide blocks is matched with the width of the safety pin plate to avoid misalignment and make the locking action more precise.

[0014] A further hydraulic press slide protection device has a front end of a safety pin plate as a socket, and a top end of a slide limit rod as a shift pin head. The socket and the shift pin head cooperate to lock or unlock, making the locking or unlocking action simple and quick, thereby avoiding affecting normal product pressing production.

[0015] A further hydraulic press slide downward protection device has a pushing mechanism fixedly connected to the surface of the fixed plate through a fixing frame; the bottom end of the slide limiting rod is fixedly connected to the surface of the slide through a lower fixing plate, which is convenient for disassembly.

[0016] 3. Beneficial effects

[0017] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0018] (1) The hydraulic press slide downward protection device of the present invention utilizes a hydraulic press component such as an oil cylinder or an upper workbench that is fixed and has sufficient strength. A safety pin plate is installed on the oil cylinder or other components. The safety pin plate is driven to move forward and backward (safety locking and unlocking) through a cylinder or other pushing mechanism. The slide block moves upward with the slide limit rod into the locking position, thereby achieving a direct mechanical blocking effect on the uncontrolled downward sliding of the slide block.

[0019] (2) The protection device of the present invention is a mechanical block type slide protection device. At the starting position of the slide, the safety pin plate has blocked the start of the slide, which completely solves the problem of the slide sliding out of control. To release the lock, the operator only needs to press the release button, thus achieving the dual protection effect of controlling the slide to slide. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a hydraulic press slide block downward protection device according to a specific embodiment;

[0021] Figure 2 for Figure 1 A schematic diagram of a top view structure;

[0022] Figure 3 It is a schematic diagram of the hydraulic press slide block in a specific embodiment when it rises to the upper position;

[0023] Figure 4 It is a schematic diagram of the state when the safety pin plate of a specific embodiment slides horizontally to the protection position.

[0024] In the figure: 1-slider; 2-cylinder; 3-upper fixed plate; 4-slide plate; 41-guide block; 5-safety pin plate; 51-socket; 6-slide limit rod; 61-gear pin head; 7-lower fixed plate; 8-cylinder piston rod; 9-pushing mechanism; 91-telescopic rod; 10, fixed frame. DETAILED DESCRIPTION

[0025] In order to further understand the content of the present invention, the invention is described in detail with reference to the accompanying drawings.

[0026] Example 1

[0027] like Figure 1 As shown, the oil cylinder 2 of the hydraulic press is fixedly connected to the slide block 1 through its piston rod 8, and the oil cylinder piston rod 8 drives the slide block 1 to move up and down.

[0028] The hydraulic press slide block protection device of this embodiment is as follows: Figure 1 , 2As shown, it includes a safety pin plate 5, a sliding limit rod 6 and a pushing mechanism 9, wherein the pushing mechanism 9 is fixed to the side of the oil cylinder 2, and can also be fixed to the side of the upper workbench, as long as it is a fixed and strong enough part of the hydraulic press body, the pushing mechanism 9 is a cylinder or an electric push rod, and is fixedly connected to the safety pin plate 5 through its telescopic rod 91; the bottom end of the sliding limit rod 6 is fixed to the upper surface of the slider 1 next to the cylinder piston rod 8.

[0029] During specific use, when the cylinder piston rod 8 drives the slider 1 to rise vertically, the pushing mechanism 9 pushes the safety pin plate 5 horizontally to lock and fix the top end of the sliding limit rod 6, thereby achieving the technical effect of preventing the slider 1 fixedly connected to the bottom end of the sliding limit rod 6 from sliding down.

[0030] When normal product pressing and production is required, the control program instructs the safety pin plate 5 to return to the original position, thereby unlocking the safety locking device of the safety pin plate 5 and the sliding limit rod 6, and the cylinder piston rod 8 drives the slide block 1 to enter the normal up and down movement pressing and production working state.

[0031] Example 2

[0032] The hydraulic press slide slide protection device of this embodiment has the same specific structure as the embodiment 1, and the difference or improvement is that it also includes an upper fixed plate 3 and a slide plate 4; the upper fixed plate 3 is transversely fixedly connected to the side of the oil cylinder 2; the pushing mechanism 9 and the slide plate 4 are both fixed to the surface of the upper fixed plate 3, and the safety pin plate 5 is slidably connected to the surface of the slide plate 4. The locking action of the safety pin plate 5 on the top of the limit slide rod 6 is more labor-saving, and it can also avoid excessive wear of the safety pin plate 5 and increase its service life. Guide blocks 41 are fixed on both sides of the slide plate 4, and the safety pin plate 5 is slidably connected between the two guide blocks 41. The spacing between the two guide blocks 41 is adapted to the width of the safety pin plate 5 to avoid misalignment and make the locking action more accurate. The front end of the safety pin plate 5 is a socket 51, and the top end of the limit slide rod 6 is a gear pin head 61. The socket 51 and the gear pin head 61 cooperate to lock or unlock, making the locking or unlocking action simple and fast, avoiding affecting the normal product pressing production. The push mechanism 9 is fixedly connected to the surface of the fixed plate 3 through the fixing frame 10; the bottom end of the slide-limiting rod 6 is fixedly connected to the surface of the slider 1 through the lower fixing plate 7. The fixing frame 10 is an L-shaped fixing plate at the left and right ends of the push mechanism 9, fixing the push mechanism 9 between the two plates, and the right L-shaped fixing plate is provided with a round hole for the telescopic rod 91 to pass through.

[0033] All the fixed connection methods in the hydraulic press slide downward protection device of this embodiment are detachable connection methods such as screw connection or clamping connection to facilitate disassembly.

[0034] Example 3

[0035] The hydraulic press slide protection device of this embodiment has the same specific structure as that of Embodiment 2, and the difference or improvement lies in: adopting the mechanical latch principle: the socket 51 is arc-shaped or semicircular, and the sliding limit rod 6 is cylindrical; the gear pin head 61 is mushroom-shaped or round plate-shaped, and its diameter is larger than the sliding limit rod 6 and the socket 51, and the socket 51 has a slightly larger diameter than the sliding limit rod 6, and the slide plate 4 is perforated with through holes at the top and bottom for the gear pin head 61 to pass through.

[0036] In specific use, such as Figure 3 , 4 As shown, the slide limit rod 6 moves up and down simultaneously with the slider 1. When the large-diameter gear pin head 61 passes through the through hole of the slide plate 4 and enters the arc-shaped semicircular hole of the socket 51 of the safety pin plate 5, and the socket 51 moves horizontally close to the middle of the small-diameter slide limit rod 6 below the gear pin head 61, the slide protection effect and function of the slider 1 is completed.

[0037] The above schematically describes the present invention and its implementation methods, which are not restrictive. The drawings show only one implementation method of the present invention, and the actual structure and manufacturing steps are not limited thereto. Therefore, if a person skilled in the art is inspired by it and, without departing from the purpose of the invention, designs a structure and an implementation method similar to the technical solution without creativity, they shall all fall within the protection scope of the present invention.

Claims

1. A hydraulic press slide protection device, characterized in that: It comprises a safety pin plate (5), a sliding limit rod (6) and a pushing mechanism (9), wherein the pushing mechanism (9) is fixed to the side of the oil cylinder (2) or the upper workbench, and is fixedly connected to the safety pin plate (5) through its telescopic rod (91); The bottom end of the slide limiting rod (6) is fixed to the upper surface of the slide block (1) beside the oil cylinder piston rod (8); After the oil cylinder piston rod (8) drives the slide block (1) to rise vertically to a set position, the pushing mechanism (9) pushes the safety pin plate (5) horizontally to lock and fix the top end of the slide limit rod (6).

2. The hydraulic press slide block downward protection device according to claim 1, characterized in that: It also includes an upper fixing plate (3) and a slide plate (4); the upper fixing plate (3) is transversely fixed to the side of the oil cylinder (2); the pushing mechanism (9) and the slide plate (4) are both fixed to the surface of the upper fixing plate (3), and the safety pin plate (5) is slidably connected to the surface of the slide plate (4).

3. The hydraulic press slide block downward protection device according to claim 2, characterized in that: Guide blocks (41) are fixed on both sides of the slide plate (4), and the safety pin plate (5) is slidably connected between the two guide blocks (41), and the distance between the two guide blocks (41) is adapted to the width of the safety pin plate (5).

4. The hydraulic press slide block downward protection device according to claim 2, characterized in that: The front end of the safety pin plate (5) is a socket (51), the top end of the slide limit rod (6) is a shift pin head (61), and the socket (51) and the shift pin head (61) cooperate to lock or unlock.

5. The hydraulic press slide block downward protection device according to any one of claims 2 to 4, characterized in that: The pushing mechanism (9) is fixedly connected to the surface of the fixed plate (3) via a fixed frame (10); the bottom end of the sliding limit rod (6) is fixedly connected to the surface of the sliding block (1) via a lower fixed plate (7).

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