Oil press capable of preventing pressure plate from falling
By designing an anti-fall device on the hydraulic press, using a support block and annular protrusion to hold the anti-fall rod in place, the problem of the medium pressure plate falling was solved, achieving a safe and reliable protective effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 五羊本田摩托(广州)有限公司
- Filing Date
- 2025-04-28
- Publication Date
- 2026-05-05
AI Technical Summary
When the connection between the intermediate pressure plate and the piston rod of the main hydraulic cylinder fails in existing hydraulic equipment, the intermediate pressure plate may drop rapidly, leading to personal injury or equipment damage.
The design includes a fall protection device, comprising a fall arrestor, a support block, and a telescopic assembly. The support block engages with the annular protrusion to lock the fall arrestor, preventing the central pressure plate from falling and enhancing safety protection.
It effectively prevents the medium pressure plate from falling, enhances safety protection capabilities, prevents injury to personnel and equipment, and has a simple and reliable structure.
Smart Images
Figure CN224197367U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of stamping equipment technology, and in particular relates to a hydraulic press that prevents the pressure plate from falling. Background Technology
[0002] The hydraulic press equipment control system consists of a hydraulic system and an electrical control system. Its main unit generally includes a frame, main cylinder, four guide columns, and a pressing structure. The four guide columns are vertically mounted on the frame. The pressing structure includes an upper pressure plate, a middle pressure plate, and a lower pressure plate mounted on the four guide columns. The middle pressure plate is a movable plate. The main cylinder is mounted on the upper pressure plate, and its piston rod passes through the upper pressure plate and connects to the middle pressure plate, driving the middle pressure plate to rise and fall. The clamps and workpieces are manually loaded and unloaded, with both manual and automatic (PLC program control) operation modes: 1. Manual clamping; 2. Middle pressure plate descends; 3. Pressing; 4. Middle pressure plate ascends back to its original position; 5. Manual removal. The hydraulic press equipment is equipped with safety protection devices such as emergency stop buttons, two-hand start buttons, and light curtains to ensure safety during automatic operation.
[0003] Although existing hydraulic equipment has an emergency stop button and safety light curtain, which can stop the equipment when triggered, it does not account for the possibility of failure in the connection between the intermediate pressure plate and the main cylinder piston rod. During automatic operation or when changing fixtures or loading workpieces, failure in the connection between the intermediate pressure plate and the main cylinder piston rod could cause the intermediate pressure plate to descend rapidly, resulting in personal injury or equipment damage. Utility Model Content
[0004] The purpose of this utility model is to provide a hydraulic press that prevents the pressure plate from falling, thereby effectively enhancing safety protection capabilities and preventing injury to personnel and equipment.
[0005] This utility model is achieved through the following technical solution:
[0006] A hydraulic press for preventing pressure plate falls includes a frame, a main hydraulic cylinder, a guide column, a pressing structure, and a control system. The guide column is vertically mounted on the frame. The pressing structure includes an upper pressure plate and a lower pressure plate at both ends of the guide column, and a middle pressure plate slidably mounted in the middle of the guide column. The main hydraulic cylinder is mounted on the upper pressure plate, and its piston rod passes through the upper pressure plate and connects to the middle pressure plate to drive the middle pressure plate to move along the guide column. The control system is connected to the main hydraulic cylinder. The press also includes a fall prevention device, comprising a fall prevention rod, a support block, and a telescopic assembly. The upper pressure plate has a through hole for the fall prevention rod to pass through, and the bottom end of the fall prevention rod passes through the through hole and connects to the middle pressure plate. The telescopic assembly is mounted on the upper pressure plate, and its telescopic end is connected to the support block to allow the support block to be tightly attached to or separated from the fall prevention rod. The fall prevention rod has multiple annular protrusions for abutting against the support block, and these annular protrusions are spaced apart along the length of the fall prevention rod. The control system is connected to the telescopic assembly.
[0007] Furthermore, the telescopic assembly includes a cylinder, a mounting plate, and two side plates. The two side plates are respectively disposed at both ends of one side of the mounting plate and are disposed on the upper pressure plate. The cylinder is disposed on the side of the mounting plate away from the side plates, and the piston rod of the cylinder passes through the mounting plate and is connected to the support block.
[0008] Furthermore, the telescopic assembly also includes a top plate, which is connected to the mounting plate and the two side plates respectively.
[0009] Furthermore, a semi-circular groove adapted to the anti-fall bar is provided on the side of the support block facing the anti-fall bar.
[0010] Furthermore, a flange is provided at the bottom of the anti-fall rod, and the flange is installed on the intermediate pressure plate.
[0011] Furthermore, the upper diameter of the annular protrusion gradually decreases.
[0012] Furthermore, the lower part of the support block facing the anti-fall bar has an inclined surface.
[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: It adds a fall protection device to the mechanical structure, which is simple in structure, robust, safe, and reliable. The support block abuts against any annular protrusion, locking the fall protection rod and preventing it from moving downwards. This effectively prevents the fall of the intermediate pressure plate due to connection failure between the intermediate pressure plate and the main cylinder piston rod, thus enhancing safety protection capabilities and preventing injury to personnel and equipment. The design of multiple annular protrusions ensures that when the fall protection function is activated at any position of the intermediate pressure plate, the support block can effectively abut against the annular protrusions to lock the fall protection rod, preventing the fall protection rod and intermediate pressure plate from falling. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the structure of the hydraulic press with anti-pressure plate falling according to the present invention;
[0015] Figure 2 for Figure 1 Enlarged schematic diagram of part A;
[0016] Figure 3 This is a schematic diagram of the anti-falling rod structure in the hydraulic press of the present invention, which is designed to prevent the pressure plate from falling.
[0017] Figure 4 This is a schematic diagram of the telescopic component in the hydraulic press that prevents the pressure plate from falling, as described in this utility model.
[0018] In the diagram, 1-frame, 2-main hydraulic cylinder, 3-guide column, 4-press-fit structure, 41-upper pressure plate, 42-lower pressure plate, 43-middle pressure plate, 5-fall protection device, 51-anti-drop rod, 52-support block, 521-semi-circular groove, 53-telescopic assembly, 531-cylinder, 532-mounting plate, 533-side plate, 534-top plate, 54-annular protrusion, 55-flange. Detailed Implementation
[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0021] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this utility model, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0022] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0023] In the description of this utility model, it should be noted that the terms "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.
[0024] Please see Figures 1 to 3 , Figure 1 This is a structural schematic diagram of the hydraulic press with anti-pressure plate falling mechanism according to this utility model. Figure 2 for Figure 1 Enlarged diagram of part A, Figure 3 This is a schematic diagram of the anti-fall rod structure in the hydraulic press for preventing pressure plate falls according to this utility model. A hydraulic press for preventing pressure plate falls includes a frame 1, a main hydraulic cylinder 2, a guide column 3, a pressing structure 4, and a control system. The guide column 3 is vertically mounted on the frame 1. The pressing structure 4 includes an upper pressure plate 41 and a lower pressure plate 42 located at both ends of the guide column 3, and a middle pressure plate 43 slidably mounted in the middle of the guide column 3. The main hydraulic cylinder 2 is mounted on the upper pressure plate 41, and the piston rod of the main hydraulic cylinder 2 passes through the upper pressure plate 41 and connects to the middle pressure plate 43 to drive the middle pressure plate 43 to move along the guide column 3. The control system is connected to the main hydraulic cylinder 2. The press also includes an anti-fall device 5. The device 5 includes an anti-fall bar 51, a support block 52, and a telescopic assembly 53. The upper pressure plate 41 has a through hole for the anti-fall bar 51 to pass through. The bottom end of the anti-fall bar 51 passes through the through hole and is connected to the middle pressure plate 43. The telescopic assembly 53 is installed on the upper pressure plate 41, and the telescopic end of the telescopic assembly 53 is connected to the support block 52 to make the support block 52 and the anti-fall bar 51 fit tightly or separate. The anti-fall bar 51 has multiple annular protrusions 54 for abutting against the support block 52. The multiple annular protrusions 54 are spaced apart along the length of the anti-fall bar 51. The control system is connected to the telescopic assembly 53.
[0025] The following is a brief explanation of the working principle of the hydraulic press with anti-pressure plate falling mechanism of this utility model:
[0026] Before automatic mode is activated, the intermediate pressure plate 43 is in its original position, and the telescopic component 53 is in the extended state, causing the support block 52 to abut against the annular protrusion 54, thus locking the anti-drop rod 51. Figure 2 As shown. When the two-hand start button is pressed, the control system sends a control signal to control the telescopic component 53 to pull the support block 52 away from the anti-drop bar 51 and back to its original position. After the middle pressure plate 43 moves down to its lower original position, it completes the pressing and returns to its upper original position. The control system sends a control signal to control the telescopic component 53 to extend, push the support block 52 to press against the anti-drop bar and abut against the annular protrusion 54, locking the anti-drop bar 51.
[0027] In manual mode, when the pressure plate 43 is moved by pressing and holding the up and down buttons, the control system sends a control signal to control the telescopic component 53 to pull the support block 52 away from the anti-drop bar 51. When the pressure plate 43 stops moving by releasing the up and down buttons, the control system sends a control signal to control the telescopic component 53 to extend, push the support block 52 to fit tightly against the anti-drop bar and abut against the annular protrusion 54, thus locking the anti-drop bar 51.
[0028] This utility model relates to a hydraulic press with an anti-fall device 5 added to the mechanical structure. The device is simple, robust, safe, and reliable. By having the support block 52 abut against any of the annular protrusions 54, the anti-fall rod 51 is locked, preventing it from moving downwards. This prevents the intermediate pressure plate 43 from falling due to a failure in the connection between the intermediate pressure plate 43 and the piston rod of the main cylinder 2, effectively enhancing safety protection and preventing injury to personnel and equipment. Multiple annular protrusions 54 are designed so that when the anti-fall function is activated at any position of the intermediate pressure plate 43, the support block 52 can effectively abut against the annular protrusions 54 to lock the anti-fall rod 51, preventing the anti-fall rod 51 and the intermediate pressure plate 43 from falling.
[0029] Please refer to the following: Figure 4 , Figure 4 This is a schematic diagram of the telescopic assembly in the hydraulic press for preventing pressure plate fall according to this utility model. In one embodiment, the telescopic assembly 53 includes a cylinder 531, a mounting plate 532, and two side plates 533. The two side plates 533 are respectively disposed at both ends of one side of the mounting plate 532 and are mounted on the upper pressure plate 41. The cylinder 531 is disposed on the side of the mounting plate 532 away from the side plates 533. The piston rod of the cylinder 531 passes through the mounting plate 532 and is connected to the support block 52. The support block 52 is located inside the two side plates 533. The two side plates 533 can restrict the movement direction of the support block 52. By moving the piston rod of the cylinder 531, the support block 52 is moved closer to or away from the anti-fall rod 51, so that the support block 52 is in close contact with or separate from the anti-fall rod 51. In one embodiment, the telescopic assembly 53 also includes a top plate 534, which is connected to the mounting plate 532 and the two side plates 533. The top plate 534 is located above the support block 52. The top plate 534, the mounting plate 532, and the two side plates 533 form a space for accommodating and allowing the support block 52 to move, preventing debris from falling between the support block 52 and the mounting plate 532 and affecting the telescopic function of the telescopic component 53.
[0030] In one embodiment, the support block 52 has a semi-circular groove 521 on the side facing the anti-fall bar 51, which is adapted to the anti-fall bar 51. When the support block 52 is in close contact with the anti-fall bar 51, a part of the anti-fall bar 51 is located in the semi-circular groove 521, which increases the contact area between the support block 52 and the annular protrusion 54, thereby increasing the force-bearing area and preventing the anti-fall function from failing due to damage to the annular protrusion 54 or the support block 52.
[0031] In one embodiment, the bottom end of the anti-fall bar 51 is provided with a flange 55, which is mounted on the intermediate pressure plate 43. This arrangement facilitates the installation and removal of the anti-fall bar 51, and the flange 55 can be connected to the intermediate pressure plate 43 by bolts.
[0032] In one embodiment, the upper diameter of the annular protrusion 54 gradually decreases. This gradual decrease in diameter forms an inclined surface. When the support block 52 contacts the upper part of the annular protrusion 54, the support block 52 can move along the inclined surface of the annular protrusion 54 until it is in close contact with the anti-fall bar 51, thereby allowing the support block 52 to abut against the next annular protrusion 54, ensuring the anti-fall function of the pressure plate is achieved while reducing impact. In one embodiment, the lower part of the support block 52 facing the anti-fall bar 51 has an inclined surface, which faces the upper pressure plate 41. When the support block 52 extends just above the annular protrusion 54, the inclined surfaces on both the support block 52 and the annular protrusion 54 further reduce impact. Preferably, the inclined surfaces on both the support block 52 and the annular protrusion 54 are 60-degree slopes.
[0033] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Therefore, any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the content of the technical solution of the present utility model shall still fall within the scope of the technical solution of the present utility model.
Claims
1. A hydraulic press for preventing pressure plate fall, comprising a frame, a main hydraulic cylinder, a guide column, a pressing structure, and a control system, wherein the guide column is vertically mounted on the frame, the pressing structure includes an upper pressure plate and a lower pressure plate at both ends of the guide column, and a middle pressure plate slidably mounted in the middle of the guide column, the main hydraulic cylinder is mounted on the upper pressure plate, and the piston rod of the main hydraulic cylinder passes through the upper pressure plate and connects to the middle pressure plate for driving the middle pressure plate to move along the guide column, and the control system is connected to the main hydraulic cylinder, characterized in that... It also includes a fall protection device, which includes a fall protection bar, a support block, and a telescopic assembly. The upper pressure plate has a through hole for the fall protection bar to pass through. The bottom end of the fall protection bar passes through the through hole and is connected to the middle pressure plate. The telescopic assembly is mounted on the upper pressure plate, and the telescopic end of the telescopic assembly is connected to the support block to make the support block and the fall protection bar fit tightly or separate. The fall protection bar has multiple annular protrusions for abutting against the support block. The multiple annular protrusions are spaced apart along the length of the fall protection bar. The control system is connected to the telescopic assembly.
2. The hydraulic press with anti-pressure plate falling protection according to claim 1, characterized in that, The telescopic assembly includes a cylinder, a mounting plate, and two side plates. The two side plates are respectively disposed at both ends of one side of the mounting plate and are disposed on an upper pressure plate. The cylinder is disposed on the side of the mounting plate away from the side plates, and the piston rod of the cylinder passes through the mounting plate and is connected to the support block.
3. The hydraulic press with anti-pressure plate falling protection according to claim 2, characterized in that, The telescopic assembly also includes a top plate, which is connected to the mounting plate and two side plates respectively.
4. The hydraulic press with anti-pressure plate falling protection according to claim 1, characterized in that, The support block has a semi-circular groove on the side facing the anti-fall bar that is adapted to the anti-fall bar.
5. The hydraulic press with anti-pressure plate falling protection according to claim 1, characterized in that, The bottom end of the anti-fall rod is provided with a flange, which is installed on the intermediate pressure plate.
6. The hydraulic press with anti-pressure plate falling protection according to claim 1, characterized in that, The upper diameter of the annular protrusion gradually decreases.
7. The hydraulic press with anti-pressure plate falling protection according to claim 6, characterized in that, The support block has an inclined surface on the lower part of the side facing the anti-fall rod.