Hydraulic press loading and unloading conveying device and hydraulic press loading and unloading system

Abstract

The present invention belongs to the technical field of hydraulic presses and relates to a hydraulic press loading and unloading conveying device, wherein a cover plate lifting mechanism and a lifting support platform are provided below the end cover plate, and a first track is provided on the lifting support platform; by providing a cover plate lifting mechanism to drive the end cover plate to lift and lower, and providing a lifting support platform to drive the movable cover plate thereon to lift and lower, the workbench is flush with the top surface of the end cover plate when in the material loading and unloading station, and the movable cover plate supports the end cover plate; when the workbench is in the forging station, the end cover plate, the movable cover plate and the top surface of the workbench are flush, thereby facilitating the safe and smooth passage of the trackless material loading and unloading machine and other vehicles in the workshop, improving the smoothness of the workshop transportation path, and improving logistics efficiency. It also relates to a hydraulic press loading and unloading system, which, by providing two sets of hydraulic press loading and unloading conveying devices symmetrically arranged about the forging station, enables two workbenches to load and unload materials interactively, reduces the standby time of the hydraulic press, and improves the utilization rate of the hydraulic press.

Description

Technical Field

[0001] The present invention belongs to the technical field of hydraulic presses, and in particular relates to a hydraulic press loading and unloading conveying device and a hydraulic press loading and unloading system. Background Art

[0002] A hydraulic press is a mechanical device that uses the static pressure of liquid to process products. It is commonly used in forging and stamping processes in the production of automobiles, home appliances, and aerospace equipment.

[0003] A hydraulic press consists of a worktable and a ram located above it. For forging, for example, the workpiece is positioned on the worktable. The ram moves downward, applying pressure to the workpiece to complete the forging process. Finally, the ram returns upward to remove the forged workpiece. Small workpieces can be loaded and unloaded directly between the worktable and the ram. However, when loading and unloading heavy or large workpieces, the large workpieces occupy most of the space between the worktable and the ram, making it nearly impossible for the automatic loading and unloading jaws to reach between them. Large workpieces typically reach up to 3000mm on a single side. To facilitate loading and unloading of large workpieces, a horizontal conveyor is now added to move the worktable outside the hydraulic press. The automatic loading and unloading machine then performs loading and unloading operations from the worktable outside the press. Hydraulic presses used for producing large workpieces are large, typically reaching 15 meters in height. A pit is typically used to reduce the floor space occupied by the press. The horizontal conveyor and its associated components are installed in the pit.

[0004] The existing hydraulic press loading and unloading horizontal conveying device includes a base 1 installed in a pit, on which a linear guide 2 is installed, and a linear drive mechanism 3 for driving a workbench 9 to move linearly along the linear guide 2. The linear guide 2 and the linear drive mechanism 3 are both located in the pit, and the linear guide 2 is installed horizontally on the base 1. The linear drive mechanism 3 is used to drive the workbench 9 to reciprocate linearly along the linear guide 2 on the base 1. An end cover 4 is provided at the top of the pit to cover the pit and prevent people or debris from falling into the pit and causing safety accidents. It also includes a movable cover 5 that is horizontally connected to the workbench 9 and moves synchronously therewith. The movable cover 5 is used to cover the space left at the loading and unloading station outside the hydraulic press when the workbench 9 moves to the forging station on the hydraulic press. The guide rail 2 is also used to guide the movable cover 5. The end cover 4 and the movable cover 5 are also used to make the road surface continuous and ensure the passage of pedestrians. In practical applications, in order to avoid mutual interference between the movable cover plate 5 and the end cover plate 4 during movement, the two are generally arranged up and down, with the top surface of the end cover plate 4 as the zero plane. Specifically, there are two arrangements:

[0005] 1. If Figure 1As shown, the movable cover plate 5 is located below the end cover plate 4, and the space below the end cover plate 4 is used to accommodate the linear drive mechanism 3 and the movable cover plate 5 when the workbench is located at the material loading and unloading station.

[0006] 2. If Figure 2 As shown, the movable cover plate 5 is located above the end cover plate 4 , and the space below the end cover plate 4 is used to accommodate the linear drive mechanism 3 .

[0007] Considering the load-bearing requirements, the thickness of the end cover plate 4 and the movable cover plate 5 is 80 to 120 mm. In the above two schemes, when the workbench 9 moves to the forging station on the hydraulic press, the movable cover plate 5 and the end cover plate 4 are horizontally offset and the travel between the two has a step structure with a height difference of 80 to 120 mm, that is, a pit with a depth of 80 to 120 mm will be formed at the movable cover plate 5 of the first structure, and a boss protruding 80 to 120 mm from the workshop floor will be formed at the movable cover plate 5 of the second structure, which will cause obstacles to the passage of workshop transport vehicles and workers. Vehicles need to take a detour, which seriously affects the material transportation efficiency of the workshop. In order to avoid vehicle detours, attempts are made to set an inclined transition portion 45 on the end cover plate 4 and the movable cover plate 5. Generally speaking, the inclined transition portion 45 is welded to the cover plate located at the upper part, and there is no support below the inclined transition portion 45, which causes it to be frequently crushed and requires frequent maintenance. Summary of the Invention

[0008] The technical problems to be solved by the present invention are: to provide a hydraulic press loading and unloading conveying device to ensure that the cover plate on the top of the pit is level so that vehicles can pass safely and smoothly; to provide a hydraulic press loading and unloading system to improve the utilization rate of the hydraulic press and improve production efficiency.

[0009] The technical solution adopted by the present invention to solve this technical problem is: a hydraulic press loading and unloading conveying device, comprising a base arranged in a pit, a linear guide rail and a linear drive mechanism, wherein the linear guide rail is located on the base; and further comprising an end cover plate installed at the opening of the pit, an end of a workbench adjacent to the end cover plate being connected to a movable cover plate, the movable cover plate being flush with and adjacent to the top surface of the workbench;

[0010] A cover plate lifting mechanism and a lifting support platform are provided below the end cover plate; the cover plate lifting mechanism is used to drive the end cover plate to move up and down, and the lifting support platform is provided with a first track arranged in the same direction as the linear guide rail;

[0011] When the lifting support platform and the end cover are both at the upper limit position, the first track is in contact with the linear guide rail, and the movable cover can move up and down the lifting support platform along the length direction of the first track;

[0012] When the lifting support platform and the end cover plate are both located at the lower limit position, the movable cover plate is located on the lifting support platform to support the end cover plate, and the workbench is flush with the top surface of the end cover plate;

[0013] When the lifting support platform and the end cover plate are both located at the lower limit positions, the movable cover plate is located on the base and is flush with the top surface of the end cover plate.

[0014] Furthermore, the top surface of the end cover plate is flush with the workshop floor.

[0015] Furthermore, the linear drive mechanism is a telescopic hydraulic cylinder arranged in a horizontal direction, and the telescopic end of the telescopic hydraulic cylinder is connected to the workbench.

[0016] Furthermore, the telescopic hydraulic cylinder is installed on the base outside the first accommodating space, and an auxiliary cover is horizontally connected between the movable cover and the workbench;

[0017] The auxiliary cover plate is flush with the top surface of the workbench.

[0018] Furthermore, the movable cover is provided with a first clamping portion protruding upward, and the auxiliary cover is provided with a second clamping portion protruding downward;

[0019] When the movable cover is at the upper limit position, the first clamping portion and the second clamping portion are clamped in the horizontal direction; when the movable cover is at the lower limit position, the first clamping portion and the second clamping portion are disconnected.

[0020] Furthermore, the lifting support platform includes a lifting portion, a support platform and a base fixedly installed on the bottom surface of the pit;

[0021] The first track is located on the support platform;

[0022] The lifting part includes a plurality of hydraulic lifting push rods; the support platform includes a horizontally arranged frame mechanism; the fixed ends of the plurality of hydraulic lifting push rods are installed on the base, and the telescopic ends of the plurality of hydraulic lifting push rods are connected to the frame mechanism.

[0023] Furthermore, a vertical guide rod is fixedly mounted on the base, a lifting sleeve is provided on the frame mechanism, and the lifting sleeve is sleeved on the vertical guide rod; the lifting sleeve is used to drive the support platform to move up and down along the axial direction of the vertical guide rod.

[0024] Furthermore, the cover plate lifting mechanism includes a plurality of telescopic hydraulic cylinders arranged in an up-down direction, and the telescopic ends of the plurality of telescopic hydraulic cylinders are connected to the bottom surface of the end cover plate.

[0025] A hydraulic press loading and unloading system, comprising any one of the hydraulic press loading and unloading conveying devices described above, wherein two sets of the hydraulic press loading and unloading conveying devices are provided, the two sets of the hydraulic press loading and unloading conveying devices are symmetrically arranged about a forging station on the hydraulic press, and the linear guide rail is connected to a track on the hydraulic press;

[0026] A workbench is installed on the rail surface of the base, and the workbench can reciprocate on the forging station on the hydraulic press and the material loading and unloading station of the hydraulic press loading and unloading conveying device.

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows: providing a hydraulic press loading and unloading conveying device, which drives the end cover plate to lift and lower by setting a cover plate lifting mechanism, and drives the movable cover plate thereon to lift and lower by setting a lifting support platform, so that the workbench is flush with the top surface of the end cover plate when in the material loading and unloading station, and the movable cover plate supports the end cover plate; when the workbench is in the forging station, the end cover plate, the movable cover plate and the top surface of the workbench are flush; it is convenient for the trackless material loading and unloading machine and other vehicles in the workshop to pass safely and smoothly, improves the smoothness of the workshop transportation path, and improves logistics efficiency. The top surface of the end cover plate is flush with the workshop floor, ensuring the flatness of the workshop floor and improving transportation safety. The linear drive mechanism is set as a telescopic hydraulic cylinder with a simple structure and easy installation; the telescopic hydraulic cylinder is horizontally installed on the base for easy installation and maintenance; the pit opening left by the workbench and the movable cover plate is filled by setting an auxiliary cover plate to ensure that the pit opening is always closed, safe and reliable. A hydraulic press loading and unloading system is provided, which enables two workbenches to load and unload materials alternately by symmetrically arranging two sets of the hydraulic press loading and unloading conveying devices, thereby reducing the standby time of the hydraulic press, improving the utilization rate of the hydraulic press, and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural diagram in the background technology;

[0029] Figure 2 It is a structural diagram in the background technology;

[0030] Figure 3 This is a structural diagram of an embodiment of a loading and unloading conveying device for a hydraulic press;

[0031] Figure 4 yes Figure 3 Schematic diagram of the cross-sectional structure along the middle section line AA;

[0032] Figure 5 It is a structural diagram of the hydraulic press loading and unloading system;

[0033] Figure markings: 1-base; 2-linear guide rail; 3-linear drive mechanism; 4-end cover; 41-first accommodating space; 42-cover lifting mechanism; 45-inclined transition portion; 5-movable cover; 51-first clamping portion; 6-lifting support platform; 61-first track; 62-lifting portion; 63-lifting platform; 631-frame mechanism; 632-lifting sleeve; 633-vertical guide rod; 64-base; 7-auxiliary cover; 71-second clamping portion; 9-workbench. DETAILED DESCRIPTION

[0034] The present invention will be further described below with reference to the accompanying drawings and examples.

[0035] As attached Figure 3-4 As shown, a hydraulic press loading and unloading conveying device includes a base 1, a linear guide 2 and a linear drive mechanism 3 arranged in a pit, the linear guide 2 is located on the base 1; it also includes an end cover plate 4 installed at the opening of the pit, and a workbench 9 is connected to a movable cover plate 5 at one end close to the end cover plate 4, and the movable cover plate 5 is flush with the top surface of the workbench 9 and is adjacently connected; a cover plate lifting mechanism 42 and a lifting support platform 6 are provided below the end cover plate 4; the cover plate lifting mechanism 42 is used to drive the end cover plate 4 to move up and down, and the lifting support platform 6 is provided with a first track 61 arranged in the same direction as the linear guide rail 2 ; When the lifting support platform 6 and the end cover plate 4 are both located at the upper limit position, the first track 61 is connected to the linear guide rail 2, and the movable cover plate 5 can move the lifting support platform 6 up and down along the length direction of the first track 61; when the lifting support platform 6 and the end cover plate 4 are both located at the lower limit position, the movable cover plate 5 is located on the lifting support platform 6 to support the end cover plate 4, and the workbench 9 is flush with the top surface of the end cover plate 4; when the lifting support platform 6 and the end cover plate 4 are both located at the lower limit position, the movable cover plate 5 is located on the base 1 and is flush with the top surface of the end cover plate 4.

[0036] The base 1 provides an installation location for the linear guide 2 and the linear drive structure 3. The linear guide 2 is used to limit the reciprocating motion path of the movable cover 5 and the workbench 9 between the material loading and unloading station and the forging station. The forging station refers to the forging processing position under the hydraulic press ram, and the material loading and unloading station refers to the position outside the hydraulic press for loading and unloading forgings. The linear guide 2 can be installed on the top surface of the base 1 or on the side of the base 1. Considering the heavy load of the workbench 9, generally, the top and side surfaces of the base 1 are provided with linear guides 2. For the sake of convenience, the space in the pit below the end cover 4 is referred to as the first accommodating space 41. The working process of this device is as follows:

[0037] When the workbench 9 moves from the forging station to the loading and unloading station, the cover lifting mechanism 42 drives the end cover 4 to the upper limit position, the lifting support platform 6 rises to the upper limit position, the first track 61 is connected to the linear guide rail 2, and a channel that can accommodate the passage of the movable cover 5 is formed between the lifting support platform 6 and the end cover 4. After the movable cover 5 moves completely to the lifting support platform 6 through the channel, the lifting support platform 6 descends to the lower limit position and drives the movable cover 5 to descend into the first accommodating space 41. At the same time, the cover lifting mechanism 42 drives the end cover 4 to descend to the lower limit position. At this time, the movable cover 5 just supports the end cover 4, the first track 61 is disconnected from the linear guide rail 2, and the end cover 4 is flush with the top surface of the workbench 9. After the workbench 9 completes the material loading and unloading operation, the end cover plate 4 rises to the upper limit position, the lifting support platform 6 also rises to the upper limit position and drives the movable cover plate 5 to rise synchronously. At this time, the first track 61 is docked with the linear guide rail 2 on the base 1 again, and the workbench 9 moves from the material loading and unloading station to the forging station. The movable cover plate 5 extends out of the first accommodating space 41 and fills the pit opening left by the workbench 9 at the material loading and unloading station. After the workbench 9 moves to the forging station and the movable cover plate 5 also moves completely out of the first accommodating space 41, the end cover plate 4 is lowered to the lower limit position, and the lifting support platform 6 is reset. At this time, the end cover plate 4, the movable cover plate 5 and the top surface of the workbench 9 are flush. The automatic material loading and unloading machine moves to the material loading and unloading position again to wait for material loading and unloading.

[0038] This device utilizes a cover plate lifting mechanism 42 to drive the lifting motion of the end cover plate 4, and a lifting support platform 6 to drive the lifting motion of the movable cover plate 5 thereon. This allows the workbench 9 to be flush with the top surface of the end cover plate 4 when in the loading and unloading station, and allows the movable cover plate 5 to support the end cover plate 4. When the workbench 9 is in the forging station, the top surfaces of the end cover plate 4, movable cover plate 5, and workbench 9 are flush. There is no need to provide an inclined transition portion 45 with an inclined surface on the end cover plate 4 and movable cover plate 5. The structure is simple and reliable, facilitating the safe and smooth passage of trackless loading and unloading machines and other vehicles within the workshop, improving the smoothness of the workshop's transportation paths and enhancing logistics efficiency.

[0039] The top surface of the end cover plate 4 can be slightly higher or slightly lower than the workshop floor. Preferably, the top surface of the end cover plate 4 is flush with the workshop floor, that is, the workbench 9 is flush with the workshop floor, and when the workbench 9 is at the forging station, the movable cover plate 5 is also flush with the workshop floor, further ensuring the safe and smooth passage of the vehicle.

[0040] The movable cover plate 5 can be driven separately. In order to ensure that the movable cover plate 5 moves synchronously with the workbench 9, preferably, the movable cover plate and the workbench 9 should be driven by the same linear drive mechanism 3, and the linear drive mechanism 3 is connected to the workbench 9 in a transmission manner. The linear drive mechanism 3 has a variety of structural forms, such as a motor-driven sprocket chain structure, a screw structure, a gear rack structure or a synchronous belt and other transmission structures. In comparison, the automatic telescopic rod structure is simpler and convenient to maintain. Because the workbench 9 is a heavy-load structure, which can generally reach 110 tons, the driving force of the pneumatic telescopic rod and the electric telescopic rod is difficult to meet the requirements. Preferably, the linear drive mechanism 3 is a telescopic hydraulic cylinder arranged in the horizontal direction, and the telescopic end of the telescopic hydraulic cylinder is connected to the workbench 9, and the telescopic rod of the telescopic hydraulic cylinder drives the workbench 9 to reciprocate in a straight line. The fixed end of the telescopic hydraulic cylinder can be fixedly mounted on the inner wall of the pit or the base 1.

[0041] Because the telescopic hydraulic cylinder still has a certain length when in the retracted state, and the first accommodating space 41 is provided with a lifting support platform 6, it is inconvenient to install the telescopic hydraulic cylinder. Specifically, the telescopic hydraulic cylinder is installed on the base 1 outside the first accommodating space 41. An auxiliary cover plate 7 is horizontally connected between the movable cover plate 5 and the workbench 9. When the workbench 9 is in the loading and unloading station, the auxiliary cover plate 7 is used to cover the pit opening between the end cover plate 4 and the workbench 9; when the workbench 9 is in the forging station, the auxiliary cover plate 7 is used to cover the pit opening between the movable cover plate 5 and the workbench 9; the auxiliary cover plate 7 is flush with the top surface of the workbench 9. One end of the auxiliary cover plate 7 is connected to the movable cover plate 5, and the other end is connected to the workbench 9. By providing the auxiliary cover plate 7 to fill the pit opening left after the workbench 9 or the movable cover plate 5 moves, the pit opening is ensured to be always closed and safe and reliable. The workbench 9 drives the auxiliary cover plate 7 to move synchronously with it, and the auxiliary cover plate 7 drives the movable cover plate 5 to move horizontally and linearly synchronously. The auxiliary cover plate 7 and the workbench 9 may be an integral structure formed in one piece, or may be assembled from independent components.

[0042] The end cover plate 4, movable cover plate 5, and auxiliary cover plate 7 in the above embodiment can all be a single piece of steel plate. Considering that heavy vehicles need to pass over them, preferably, the bottoms of the end cover plate 4, movable cover plate 5, and auxiliary cover plate 7 are all provided with a reinforcement frame to increase the rigidity and strength of the cover plate and ensure the safety of passing vehicles. The reinforcement frame can be welded from rectangular tubes, angle steel, I-beams, and plates.

[0043] The connection method between the movable cover plate 5 and the auxiliary cover plate 7 should satisfy the lifting movement of the movable cover plate 5 along with the lifting support platform 6. The movable cover plate 5 and the auxiliary cover plate 7 can be connected by a sliding block and a slide rail, or can be connected by a sliding block and a rail, or can be a detachable connection structure. When a detachable connection method is adopted, the movable cover plate 5 is connected to the workbench 9 when it is in the upper limit position, and the movable cover plate 5 should be disconnected from the workbench 9 when it is in the lower limit position. Preferably, the movable cover plate 5 is provided with a first clamping portion 51 protruding upward, and the auxiliary cover plate 7 is provided with a second clamping portion 71 protruding downward; when the movable cover plate 5 is in the upper limit position, the first clamping portion 51 and the second clamping portion 71 are clamped in the horizontal direction; when the movable cover plate 5 is in the lower limit position, the first clamping portion 51 and the second clamping portion 71 are disconnected, and the structure is simple and easy to process.

[0044] The lifting support platform 6 includes a lifting part 62 and a support platform 63, and the lifting part 62 drives the support platform 63 to move up and down. The lifting part 62 can be directly fixedly installed on the bottom surface of the pit, or it can be connected to the bottom surface of the pit through a base 64. The lifting part 62 has a variety of structural forms, which can be a telescopic push rod, a gear rack structure, a screw structure or a sprocket chain structure. The support platform 63 can be a frame structure welded by steel materials such as rectangular tubes, angle steels and I-beams, or a single plate, or a combination of the above two. Preferably, the lifting support platform 6 includes a lifting part 62, a support platform 63 and a base 64 fixedly installed on the bottom surface of the pit; the first track 61 is located on the lifting platform 63; the lifting part 62 includes a plurality of hydraulic lifting push rods; the support platform 63 includes a horizontally arranged frame mechanism 631; the fixed ends of the plurality of hydraulic lifting push rods are installed on the base 64, and the telescopic ends of the plurality of hydraulic lifting push rods are connected to the frame mechanism 631, which has a simple structure and is easy to install. The base 64 is used to provide a flat installation surface for the lifting parts 62 to ensure the installation accuracy of the multiple lifting parts 62. The frame mechanism 631 is used to enhance the rigidity and strength of the support platform 63 to prevent its deformation and damage.

[0045] Preferably, the structure further includes a vertical guide rod 633. The frame mechanism 631 is provided with a lifting sleeve 632, which is sleeved on the vertical guide rod 633. The lifting sleeve 632 is used to drive the support platform 63 to move along the axial direction of the vertical guide rod 633 to ensure smooth lifting of the support platform 63. The vertical guide rod 633 can be fixedly installed at the bottom of the pit and fixed by pouring concrete. However, the cast vertical guide rod 633 is difficult to adjust and maintain. As a further preference, the vertical guide rod 633 is fixedly installed on the base 64 to facilitate assembly, disassembly, and maintenance. The vertical guide rod 633 and the base 64 can be welded or bolted. The lifting sleeve 632 can be a linear bearing.

[0046] Preferably, the cover plate lifting mechanism 42 comprises multiple telescopic hydraulic cylinders arranged vertically, with the telescopic ends of the multiple telescopic hydraulic cylinders connected to the bottom surface of the end cover plate 4. This simple structure facilitates assembly, disassembly, and maintenance. Because the end cover plate 4 is located above the pit, a step below the workshop floor is typically provided above the pit. The telescopic hydraulic cylinders are fixed to the step, requiring that the top surface of the end cover plate 4 be flush with the ground when in the lower limit position.

[0047] In actual production, if only one set of the present invention is used to load and unload the hydraulic press, when the workbench 9 is located at the loading and unloading station, the hydraulic press can only be in a standby state, and the utilization rate of the hydraulic press is low. Figure 5 As shown, a hydraulic press loading and unloading system includes two sets of any of the aforementioned hydraulic press loading and unloading conveying devices. Two sets of the hydraulic press loading and unloading conveying devices are arranged symmetrically about the forging station on the hydraulic press, and the linear guide rails 2 are connected to the tracks on the hydraulic press. A workbench 9 is mounted on the track surface of the base 1, and the workbench 9 can reciprocate between the forging station on the hydraulic press and the loading and unloading stations of the hydraulic press loading and unloading conveying devices. The device has two loading and unloading stations, which are also arranged symmetrically about the forging station. One set of hydraulic press loading and unloading conveying devices drives the workbench 9 on the forging station toward the loading and unloading station, while the other set of hydraulic press loading and unloading conveying devices drives the other workbench 9 from the loading and unloading station to the forging station. The two workbench 9 move horizontally in the same direction and alternately load materials to the forging station, reducing the standby time of the hydraulic press, improving the utilization rate of the hydraulic press, and increasing production efficiency.

[0048] The above is a specific embodiment of the present invention. It can be seen from the implementation process that the present invention provides a hydraulic press loading and unloading conveying device, which drives the end cover plate to lift and lower by setting a cover plate lifting mechanism, and drives the movable cover plate thereon to lift and lower by setting a lifting support platform, so that the workbench is flush with the top surface of the end cover plate when in the material loading and unloading station, and the movable cover plate supports the end cover plate; when the workbench is in the forging station, the end cover plate, the movable cover plate and the top surface of the workbench are flush; it is convenient for the trackless material loading and unloading machine and other vehicles in the workshop to pass safely and smoothly, improve the smoothness of the workshop transportation path, and improve logistics efficiency. The top surface of the end cover plate is flush with the workshop floor, ensuring the flatness of the workshop floor and improving transportation safety. The linear drive mechanism is set as a telescopic hydraulic cylinder with a simple structure and easy installation; the telescopic hydraulic cylinder is horizontally installed on the base for easy installation and maintenance; the auxiliary cover plate is set to fill the pit opening left by the workbench and the movable cover plate to ensure that the pit opening is always closed, safe and reliable. A hydraulic press loading and unloading system is provided, which enables two workbenches to load and unload materials alternately by symmetrically arranging two sets of the hydraulic press loading and unloading conveying devices, thereby reducing the standby time of the hydraulic press, improving the utilization rate of the hydraulic press, and improving production efficiency.

Claims

1. A hydraulic press loading and unloading conveying device, comprising a base (1) arranged in a pit, a linear guide rail (2) and a linear drive mechanism (3), wherein the linear guide rail (2) is located on the base (1); further comprising an end cover plate (4) installed at an opening of the pit, a workbench (9) adjacent to one end of the end cover plate (4) being connected to a movable cover plate (5), the movable cover plate (5) being flush with and adjacent to the top surface of the workbench (9); characterized in that: A cover plate lifting mechanism (42) and a lifting support platform (6) are provided below the end cover plate (4); the cover plate lifting mechanism (42) is used to drive the end cover plate (4) to move up and down, and the lifting support platform (6) is provided with a first track (61) arranged in the same direction as the linear guide rail (2); The linear drive mechanism (3) is a telescopic hydraulic cylinder arranged in the horizontal direction, and the telescopic end of the telescopic hydraulic cylinder is connected to the workbench (9); The telescopic hydraulic cylinder is mounted on the base (1) outside the first accommodating space (41); an auxiliary cover plate (7) is horizontally connected between the movable cover plate (5) and the workbench (9); the auxiliary cover plate (7) is flush with the top surface of the workbench (9); the space in the pit below the end cover plate (4) is the first accommodating space (41); The movable cover (5) is provided with a first clamping portion (51) protruding upward, and the auxiliary cover (7) is provided with a second clamping portion (71) protruding downward; when the movable cover (5) is in the upper limit position, the first clamping portion (51) and the second clamping portion (71) are clamped in the horizontal direction; when the movable cover (5) is in the lower limit position, the first clamping portion (51) and the second clamping portion (71) are disconnected; When the lifting support platform (6) and the end cover plate (4) are both located at the upper limit position, the first track (61) is in contact with the linear guide rail (2), and the movable cover plate (5) can move the lifting support platform (6) up and down along the length direction of the first track (61); The movable cover plate (5) is located in the first accommodating space (41) and is completely located on the lifting support platform (6). When the lifting support platform (6) and the end cover plate (4) are both located at the lower limit position, the movable cover plate (5) is located on the lifting support platform (6) to support the end cover plate (4), and the workbench (9) is flush with the top surface of the end cover plate (4); The movable cover plate (5) is completely located outside the first accommodating space (41), and when the lifting support platform (6) and the end cover plate (4) are both located at the lower limit position, the movable cover plate (5) is located on the base (1) and is flush with the top surface of the end cover plate (4).

2. The hydraulic press loading and unloading conveying device according to claim 1, characterized in that: The top surface of the end cover plate (4) is flush with the workshop floor.

3. The hydraulic press loading and unloading conveying device according to claim 1, characterized in that: The lifting support platform (6) comprises a lifting portion (62), a support platform (63), and a base (64) fixedly mounted on the bottom surface of the pit; The first track (61) is located on the support platform (63); The lifting portion (62) includes a plurality of hydraulic lifting push rods; the support platform (63) includes a horizontally arranged frame mechanism (631); the fixed ends of the plurality of hydraulic lifting push rods are mounted on the base (64), and the telescopic ends of the plurality of hydraulic lifting push rods are connected to the frame mechanism (631).

4. The hydraulic press loading and unloading conveying device according to claim 3 is characterized in that: A vertical guide rod (633) is fixedly mounted on the base (64), and a lifting sleeve (632) is provided on the frame mechanism (631). The lifting sleeve (632) is sleeved on the vertical guide rod (633); the lifting sleeve (632) is used to drive the support platform (63) to move up and down along the axial direction of the vertical guide rod (633).

5. The hydraulic press loading and unloading conveying device according to claim 1, characterized in that: The cover plate lifting mechanism (42) comprises a plurality of telescopic hydraulic cylinders arranged in an up-down direction, and the telescopic ends of the plurality of telescopic hydraulic cylinders are connected to the bottom surface of the end cover plate (4).

6. A hydraulic press loading and unloading system, characterized by: The hydraulic press loading and unloading conveying device comprises the hydraulic press loading and unloading conveying device according to any one of claims 1 to 5, wherein two sets of the hydraulic press loading and unloading conveying devices are provided, and the two sets of the hydraulic press loading and unloading conveying devices are symmetrically arranged with respect to the forging stations on the hydraulic press, and the linear guide rail (2) is connected to the rail on the hydraulic press; A workbench (9) is installed on the track surface of the base (1), and the workbench (9) can reciprocate between the forging station on the hydraulic press and the loading and unloading station of the hydraulic press loading and unloading conveying device.

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