Movable workbench suitable for upsetting hydraulic machine

Abstract

The invention relates to the technical field of upsetting hydraulic machines, and provides a movable workbench suitable for an upsetting hydraulic machine, which comprises a bearing table, a jacking device, a pushing device, a lower cross beam and a guide rail, each jacking device comprises a first hydraulic cylinder, a vehicle body and rolling wheels, the first hydraulic cylinders are arranged at the center positions of the vehicle bodies, the tops of the first hydraulic cylinders are connected with the bearing platform, the tops of the vehicle bodies are detachably connected with the bearing platform, the rolling wheels are installed at the bottoms of the vehicle bodies and are in rolling connection with the vehicle bodies, and the at least two sets of jacking devices are arranged on the two sides of the bearing platform respectively; the pushing device comprises a first push rod and a second push rod, the first push rod is arranged at the tail end of the bearing table, the second push rod is arranged at the front end of the bearing table, and the first push rod and the second push rod push the bearing table and the rolling wheels to move along the guide rail.

Description

Technical Field

[0001] The invention relates to the technical field of upsetting hydraulic presses, and in particular to a movable workbench suitable for upsetting hydraulic presses. Background Art

[0002] The crankshaft of a large marine engine is used to convert the thrust from the piston connecting rod of an internal combustion engine into torque, and then transmit and convert it into work output for ships with a displacement of tens to hundreds of thousands of tons. It is a key core component of a marine engine.

[0003] The integral full-fiber upsetting method is to use a special upsetting tool and die on a die forging hydraulic press, and use the upsetting and bending combined process to complete the overall forming of the crankshaft. The integral full-fiber forged crankshaft has good comprehensive mechanical properties due to the good preservation of metal streamlines, can withstand greater power output, and has higher fatigue strength.

[0004] With the vigorous development of the shipbuilding industry, the large-scale all-fiber crankshafts used in the manufacture of ships that can only be formed by 10,000-ton die forging equipment can weigh tens of tons or even hundreds of tons, and the total weight of the integrated upsetting tooling and dies installed in the press can reach hundreds or even thousands of tons. For such heavy forging equipment, a corresponding overweight load-bearing platform is required to replace the equipment dies and upsetting tooling, so as to facilitate their maintenance, improve production efficiency and reduce the labor intensity of replacing dies.

[0005] At present, the load-bearing capacity of small and medium-sized load-bearing platforms equipped with conventional forging equipment is usually several tons, and the maximum is four or five hundred tons. In the past, there was no precedent for the load-bearing platform equipped with a hydraulic press to bear thousands of tons; and their first hydraulic cylinder is usually installed on the lower crossbeam of the hydraulic press, and a hole needs to be opened on the lower crossbeam to arrange the first hydraulic cylinder, which will greatly weaken the strength and stiffness of the lower beam; at the same time, when the load-bearing platform reciprocates to switch workstations, the weight of the load-bearing platform itself plus the weight of the integral upsetting tooling and mold can reach more than a thousand tons. Since conventional forging equipment uses the first hydraulic cylinder to fix the "pit position", the lifting of the load-bearing platform requires it to move to its exact position. If the load-bearing platform body is not accurately positioned and docked, the center of gravity of the loaded object is eccentric with the support center of the first hydraulic cylinder. The load-bearing platform will crush the edge of the first hydraulic cylinder of the hydraulic press during the process of falling into place, causing the first hydraulic cylinder to jam during the lifting and lowering process, resulting in the load-bearing platform being unable to move in and out normally. In addition, due to the high value of the forged crankshaft, the failure of the load-bearing platform will cause huge economic losses. Summary of the invention

[0006] The present invention aims to solve at least one of the technical problems existing in the related art. To this end, the present invention provides a mobile workbench suitable for an upsetting hydraulic press, which has a simple structure and a wider range of applications.

[0007] The present invention provides a mobile workbench suitable for an upsetting hydraulic press, comprising: a load-bearing platform, a lifting device, a pushing device, a lower cross beam and a guide rail; the lifting device comprises a first hydraulic cylinder, a body and a roller, the first hydraulic cylinder is arranged at the center position of the body, the top of the first hydraulic cylinder is connected to the load-bearing platform, the top of the body is detachably connected to the load-bearing platform, the bottom of the body is equipped with a roller, the roller is rollingly connected to the body, the lifting device comprises at least two groups, which are arranged on both sides of the load-bearing platform; the guide rail is arranged on the top of the lower cross beam, the pushing device comprises a first push rod and a second push rod, the first push rod is arranged at the tail end of the load-bearing platform, the second push rod is arranged at the front end of the load-bearing platform, the first push rod and the second push rod push the load-bearing platform and the roller to move along the guide rail.

[0008] According to a mobile workbench suitable for an upsetting hydraulic press provided by the present invention, the jacking device also includes a guide sleeve and a guide column, the guide sleeve is fixedly connected to the vehicle body, the guide column passes through the guide sleeve and is slidably connected to the guide sleeve, and the top end of the guide column is fixedly connected to the load-bearing platform.

[0009] According to a movable workbench suitable for an upsetting hydraulic press provided by the present invention, the jacking device further comprises a limit block, and the limit block is arranged at the bottom end of the guide column and fixedly connected to the guide column.

[0010] According to a mobile workbench suitable for an upsetting hydraulic press provided by the present invention, four groups of jacking devices are provided, which are respectively arranged at the lower ends of the four corners of the load-bearing platform to support the load-bearing platform.

[0011] According to a movable workbench suitable for an upsetting hydraulic press provided by the present invention, a circular ring is fixedly provided on the outer side wall of the roller, the circular ring is arranged perpendicular to the axial direction of the roller and is adapted to the groove on the top surface of the guide rail.

[0012] According to a mobile workbench suitable for an upsetting hydraulic press provided by the present invention, the vehicle body includes a first shell, a first hydraulic cylinder is arranged inside the first shell, and a first side wall of the first shell is detachably connected to a bottom plate of the first shell.

[0013] According to a mobile workbench suitable for an upsetting hydraulic press provided by the present invention, the jacking device also includes a supporting assembly, the supporting assembly includes a supporting plate and a supporting plug plate, the supporting plate is fixedly connected to the top surface of the vehicle body, and the supporting plug plate is arranged on the top of the supporting plate and is detachably connected to the supporting plate.

[0014] According to a mobile workbench suitable for an upsetting hydraulic press provided by the present invention, the jacking device also includes a cleaning component, and the cleaning component is fixedly connected to the lower bottom surface of the vehicle body for cleaning dust on the guide rail.

[0015] According to a mobile workbench suitable for an upsetting hydraulic press provided by the present invention, a positioning hole is arranged on the bottom surface of the load-bearing platform, a positioning pin assembly is arranged on the top of the lower cross beam, and the positioning hole cooperates with the positioning pin assembly.

[0016] According to a movable workbench suitable for an upsetting hydraulic press provided by the present invention, the first push rod and the second push rod are connected to the load-bearing platform by using a floating hinge support.

[0017] The above one or more technical solutions in the embodiments of the present invention have at least one of the following technical effects: The mobile workbench suitable for the upsetting hydraulic press according to the embodiment of the present invention is fixedly connected with the load-bearing platform by arranging a lifting device, and the lifting device and the load-bearing platform move synchronously, thereby solving the problems of inaccurate positioning and docking of the load-bearing platform, and eccentricity between the center of gravity of the loaded object and the support center of the first hydraulic cylinder. The mobile workbench suitable for the load-bearing platform with a load of 10,000 tons achieves the purpose of improving the stability of the load-bearing platform by using a simple structure, facilitating disassembly and maintenance, and improving work efficiency.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 The present invention is a schematic structural diagram of a movable workbench suitable for an upsetting hydraulic press.

[0021] Figure 2 This is one of the structural schematic diagrams of the jacking device of the mobile workbench suitable for the upsetting hydraulic press provided by the present invention.

[0022] Figure 3 This is the second structural schematic diagram of the jacking device of the mobile workbench suitable for the upsetting hydraulic press provided by the present invention.

[0023] Figure 4 The diagram is a partial structural diagram of a movable workbench suitable for an upsetting hydraulic press provided by the present invention.

[0024] Figure 5 The present invention is a schematic structural diagram of a positioning pin assembly suitable for a mobile workbench of an upsetting hydraulic press.

[0025] Figure 6 It is a structural schematic diagram of the third hydraulic cylinder of the mobile workbench of the upsetting hydraulic press provided by the present invention.

[0026] Reference numerals: 1. Load-bearing platform; 11. Positioning hole; 111. Positioning sleeve; 2. Lifting device; 21. First hydraulic cylinder; 22. Car body; 221. First shell; 2211. First side wall; 222. Second shell; 23. Roller; 24. Guide sleeve; 25. Guide column; 26. Limit block; 27. Support assembly; 271. Support plate; 272. Support plug plate; 28. Cleaning assembly; 29. ​​End cover; 3. Pushing device; 31. First push rod; 32. Second push rod; 33. Third hydraulic cylinder; 331. Piston rod of third hydraulic cylinder; 332. Cylinder body of third hydraulic cylinder; 4. Lower crossbeam; 41. Positioning pin assembly; 411. Second hydraulic cylinder; 412. Pin; 413. Limit rod; 5. Guide rail; 6. Bracket. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the present invention clearer, the technical scheme in the present invention will be clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention. The following embodiments are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0028] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0029] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0030] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0031] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0032] Figure 1 The present invention is a schematic structural diagram of a movable workbench suitable for an upsetting hydraulic press. Figure 2 This is one of the structural schematic diagrams of the jacking device of the mobile workbench suitable for the upsetting hydraulic press provided by the present invention. Figure 3 This is the second structural schematic diagram of the jacking device of the mobile workbench suitable for the upsetting hydraulic press provided by the present invention.

[0033] The present invention provides a mobile workbench suitable for an upsetting hydraulic press, such as Figures 1 to 3As shown, a mobile workbench suitable for an upsetting hydraulic press comprises: a load-bearing platform 1, a lifting device 2, a pushing device 3, a lower cross beam 4 and a guide rail 5; the lifting device 2 comprises a first hydraulic cylinder 21, a body 22 and a roller 23, the first hydraulic cylinder 21 is arranged at the center of the body 22, the top of the first hydraulic cylinder 21 is connected to the load-bearing platform 1, the top of the body 22 is detachably connected to the load-bearing platform 1, the bottom of the body 22 is equipped with a roller 23, the roller 23 is rollingly connected to the body 22, the lifting device 2 comprises at least two groups, which are arranged on both sides of the load-bearing platform 1; the guide rail 5 is arranged on the top of the lower cross beam 4, the pushing device 3 comprises a first push rod 31 and a second push rod 32, the first push rod 31 is arranged at the tail end of the load-bearing platform 1, the second push rod 32 is arranged at the front end of the load-bearing platform 1, the first push rod 31 and the second push rod 32 push the load-bearing platform 1 and the roller 23 to move along the guide rail 5.

[0034] In this embodiment, by setting the jacking device 2 and the load-bearing platform 1 fixedly connected, the jacking device 2 and the load-bearing platform 1 move synchronously, which solves the problems of inaccurate positioning and docking of the load-bearing platform 1 and eccentricity between the center of gravity of the loaded object and the support center of the first hydraulic cylinder 21. It is suitable for the load-bearing platform 1 with a load of 10,000 tons, and realizes the use of a simple structure to improve the stability of the load-bearing platform 1, facilitate disassembly and maintenance, and improve work efficiency.

[0035] According to some embodiments of the present invention, after the lower cross beam 4 of the upsetting hydraulic press is fixedly connected to the ground by anchor bolts, a guide rail 5 is arranged on the top of the lower cross beam 4, and brackets 6 are arranged on both sides of the lower cross beam 4. The brackets 6 are flush with the top of the lower cross beam 4, and the guide rails 5 extend to the upper end of the brackets 6. The rollers 23 of the jacking assembly cooperate with the guide rails 5, and the rollers 23 and the load-bearing platform 1 move along the guide rails 5 to avoid the reciprocating motion of the load-bearing platform 1 in the process of switching workstations. The load-bearing platform 1 is not accurately positioned and docked, and the center of gravity of the loaded object is eccentric with the support center of the first hydraulic cylinder 21. The load-bearing platform 1 will crush the edges of the first hydraulic cylinder 21 of the hydraulic press in the process of falling into place, causing the first hydraulic cylinder 21 to be stuck during the lifting and lowering process, resulting in the load-bearing platform 1 being unable to move in and out normally.

[0036] According to some preferred embodiments of the present invention, the load-bearing platform 1 adopts a double-cap wing-shaped single body load-bearing platform 1, which is an integral steel casting, with the center being a cast steel entity, and the left and right wings being extensions of the center entity, meeting the loading requirements of the upsetting hydraulic press.

[0037] According to some preferred embodiments of the present invention, the guide rail 5 bracket 6 is an integral welded structure with sufficient rigidity and high strength, which can meet the load-bearing requirements of the thousand-ton load-bearing platform 1 and the horizontal shear force requirements generated by the oil when the pushing device 3 is working.

[0038] According to some preferred embodiments of the present invention, the first hydraulic cylinder 21 is connected to the load-bearing platform 1 by a ball hinge structure to compensate for the eccentric load and tilt of the load-bearing platform 1 caused by the asynchronous lifting of the first hydraulic cylinder 21 of the four-corner load-bearing platform 1, so that the wheel group can touch the ground at the same time at any time and be evenly loaded.

[0039] According to some preferred embodiments of the present invention, the first hydraulic cylinder 21 is designed with a stroke end margin, which can effectively prevent the roller 23 from being subjected to the pressure applied by the equipment. The maximum stroke of the first hydraulic cylinder 21 is 20 mm, the working stroke is 10 mm, and the cylinder mouth margin is 5 mm in the load-bearing platform 1 Upward state, the cylinder bottom margin is 5 mm in the load-bearing platform 1 Downward state, that is, when the load-bearing platform 1 is lifted, the lifting amount at the four corners is uniform, and when the load-bearing platform 1 falls, the middle part of the load-bearing platform 1 falls to the ground first. The first hydraulic cylinder 21 has margins at the upper and lower ends of the stroke, so that the cylinder mouth and cylinder bottom are not subjected to impact force when the load-bearing platform 1 rises and falls.

[0040] According to some embodiments of the present invention, the first hydraulic cylinder 21 is not disposed on the lower cross beam 4 , and the lower cross beam 4 does not need to have a hole, thereby improving the overall strength of the lower cross beam 4 .

[0041] According to some embodiments of the present invention, the first hydraulic cylinder 21 is hydraulically locked for jacking and stably supported, the pressure relay monitors the oil pressure changes in real time, the PLC feedbacks dynamic oil replenishment, synchronous oil supply, the flow rate is individually adjustable, and the equal-height stable support is provided; the first hydraulic cylinder 21 is integrated with the vehicle body 22, and is separated from the lower cross beam 4, and moves with the load-bearing platform 1. Compared with the structure installed on the lower cross beam 4, it can effectively solve the problem of plastic deformation caused by edge crushing and thus jamming of the jacking device 2.

[0042] According to some preferred embodiments of the present invention, the lifting device 2 also includes a second shell 222, the bottom end of the second shell 222 is set to be an opening, the roller 23 is rotatably arranged inside the second shell 222, the roller 23 and the second shell 222 are connected by an end cover 29, and the second shell 222 is slidably matched with the guide rail 5.

[0043] According to some preferred embodiments of the present invention, the jacking device 2 is provided with two second housings 222 along the extending direction of the guide rail 5 , and the two second housings 222 are respectively arranged on both sides of the first hydraulic cylinder 21 .

[0044] According to some embodiments of the present invention, the vehicle body 22 is completely separated from the load-bearing platform 1, which is convenient for later maintenance and inspection, and more convenient for disassembly and repair.

[0045] According to the present invention, a movable workbench suitable for an upsetting hydraulic press is provided, such as Figures 1 to 3As shown, the jacking device 2 also includes a guide sleeve 24 and a guide column 25. The guide sleeve 24 is fixedly connected to the vehicle body 22. The guide column 25 passes through the guide sleeve 24 and is slidably connected to the guide sleeve 24. The top end of the guide column 25 is fixedly connected to the load-bearing platform 1.

[0046] In this embodiment, by setting the guide column 25 and the guide sleeve 24, the guide column 25 is fixedly connected to the load-bearing platform 1, so that the load-bearing platform 1 will not be unbalanced due to uneven force during the rising process. The guide column 25 has the functions of positioning and lifting guide, limiting the vehicle body 22, and resisting unbalanced loading, thereby improving the safety of the load-bearing platform 1.

[0047] According to some preferred embodiments of the present invention, the jacking device 2 is provided with two guide sleeves 24 and guide columns 25 in combination front and rear along the extension direction of the guide rail 5, which are respectively arranged at both ends of the vehicle body 22 to improve the stability of the load-bearing platform 1.

[0048] According to the present invention, a movable workbench suitable for an upsetting hydraulic press is provided, such as Figures 1 to 3 As shown, the lifting device 2 further includes a limit block 26 , which is disposed at the bottom end of the guide column 25 and fixedly connected to the guide column 25 .

[0049] In this embodiment, by setting the limit block 26, the upward displacement of the load-bearing platform 1 is accurately positioned to ensure that there is a margin at the ends of the upper and lower strokes of the first hydraulic cylinder 21, and to ensure that the lifting amounts of the four corners of the load-bearing platform 1 are consistent.

[0050] According to some preferred embodiments of the present invention, the top end of the guide column 25 is fixedly connected to the load-bearing platform 1 through an upper screw and an upper super nut, and the bottom end of the guide column 25 is fixedly connected to the limit block 26 through a lower screw and a lower super nut.

[0051] According to the present invention, a movable workbench suitable for an upsetting hydraulic press is provided, such as Figures 1 to 3 As shown, the jacking device 2 is provided with four groups, which are respectively arranged at the lower ends of the four corners of the bearing platform 1 to support the bearing platform 1.

[0052] In this embodiment, the load-bearing tonnage is large, a single first hydraulic cylinder 21 can bear 250 tons, and the four groups can bear a total of 1,000 tons.

[0053] According to the present invention, a movable workbench suitable for an upsetting hydraulic press is provided, such as Figures 1 to 3 As shown, a circular ring is fixedly provided on the outer side wall of the roller 23 , and the circular ring is perpendicularly provided to the axial direction of the roller 23 and is adapted to the groove on the top surface of the guide rail 5 .

[0054] In this embodiment, a circular ring is provided to fit the groove so as to limit the moving direction of the roller 23 and avoid eccentric loading.

[0055] According to some embodiments of the present invention, when the load-bearing platform 1 rises or falls, the roller 23 is always in contact with the guide rail 5 and is not subjected to force, and the guide surface of the circular ring never leaves the groove, thereby solving the problem of the center of gravity of the loaded object being eccentric with the support center of the first hydraulic cylinder 21 due to inaccurate positioning and docking of the load-bearing platform 1.

[0056] According to the present invention, a movable workbench suitable for an upsetting hydraulic press is provided, such as Figures 1 to 3 As shown, the vehicle body 22 includes a first shell 221 , the first hydraulic cylinder 21 is disposed inside the first shell 221 , and the first side wall 2211 of the first shell 221 is detachably connected to the bottom plate of the first shell 221 .

[0057] In this embodiment, the first side wall 2211 of the first housing 221 is detachably connected to the bottom plate of the first housing 221 , so as to facilitate maintenance of the first hydraulic cylinder 21 .

[0058] According to some embodiments of the present invention, when removing the first hydraulic cylinder 21, there is no need to dismantle the load-bearing platform 1. After removing the first side wall 2211, it can be dragged out from the side of the load-bearing platform 1, which is convenient for inspection, maintenance or replacement of the seal.

[0059] According to some preferred embodiments of the present invention, the first side wall 2211 is configured as a structure in which a notch and a plug plate cooperate. A plug plate structure is added at the notch, and it is supported with the vehicle body 22 with a small gap, which can effectively solve the problem of large deformation of the vehicle body 22 after the vehicle body 22 is subjected to working force after the notch is opened.

[0060] According to the present invention, a movable workbench suitable for an upsetting hydraulic press is provided, such as Figures 1 to 3 As shown, the lifting device 2 also includes a support assembly 27, and the support assembly 27 includes a support plate 271 and a support plug plate 272. The support plate 271 is fixedly connected to the top surface of the vehicle body 22, and the support plug plate 272 is arranged on the top of the support plate 271 and is detachably connected to the support plate 271.

[0061] In this embodiment, the support plate 271 cooperates with the support plug plate 272 to protect the load-bearing platform 1 from bottoming out, which is convenient for maintenance.

[0062] According to some embodiments of the present invention, during the normal operation of the load-bearing platform 1, the support plug plate 272 is removed to avoid affecting the rise and fall of the load-bearing platform 1. The problem of the load-bearing platform 1 being paralyzed after there is no power source can be solved by simply plugging and unplugging the support plug plate 272 of appropriate weight between the vehicle body 22 and the load-bearing platform 1. Even if the oil pipe is cut off, this operation can keep the load-bearing platform 1 in a lifted state without dragging the bottom. The load-bearing platform 1 can still be moved by tools such as external fall chains to meet the demand for supporting weight and movement during equipment overhaul. When disassembling the jacking device 2, after the upper super nut and the screw are removed from above, the guide column 25 and the lower super nut naturally fall to the bottom of the vehicle body 22, and then the jacking device 2 can be moved out as a whole for inspection. There will be no problem of dry grinding and scratching between the guide column 25 screw and the guide plate, and there is no need to rely on human support.

[0063] According to some preferred embodiments of the present invention, the support plug plate 272 itself is light in weight and has a handle thereon for easy manual insertion and removal.

[0064] According to the present invention, a movable workbench suitable for an upsetting hydraulic press is provided, such as Figures 1 to 3 As shown, the lifting device 2 further includes a cleaning component 28 , which is fixedly connected to the lower bottom surface of the vehicle body 22 for cleaning dust on the guide rail 5 .

[0065] According to some preferred embodiments of the present invention, the cleaning component 28 includes a splint contour structure, that is, the middle layer between the two layers of steel plates is a dust-removing felt, and its shape completely fits the guide rail 5 with grooves, so that dust and foreign matter on the guide rail 5 can be effectively removed during the movement of the vehicle body.

[0066] Figure 4 The diagram is a partial structural diagram of a movable workbench suitable for an upsetting hydraulic press provided by the present invention. Figure 5 The present invention is a schematic structural diagram of a positioning pin assembly suitable for a mobile workbench of an upsetting hydraulic press.

[0067] According to the present invention, a movable workbench suitable for an upsetting hydraulic press is provided, such as Figures 4 to 5 As shown, a positioning hole 11 is provided on the bottom surface of the load-bearing platform 1 , and a positioning pin assembly 41 is provided on the top of the lower cross beam 4 , and the positioning hole 11 cooperates with the positioning pin assembly 41 .

[0068] In this embodiment, by providing the positioning hole 11 and cooperating with the positioning pin assembly 41, the load-bearing platform 1 is accurately positioned to ensure the quality of the processed parts.

[0069] According to some preferred embodiments of the present invention, the positioning pin assembly 41 includes a second hydraulic cylinder 411 and a latch pin 412 , and a piston rod of the second hydraulic cylinder 411 is connected to the latch pin 412 to drive the latch pin 412 to move.

[0070] According to some preferred embodiments of the present invention, a limiting rod 413 is installed at the bottom of the second hydraulic cylinder 411, and the second hydraulic cylinder 411 is a double-rod cylinder. A signaling ring is installed at the bottom of the piston rod of the second hydraulic cylinder 411, and the piston rod of the second hydraulic cylinder 411 extends from the bottom, and the signaling ring cooperates with the limiting rod 413.

[0071] According to some preferred embodiments of the present invention, a positioning sleeve 111 is installed on the positioning hole 11 , and the positioning sleeve 111 has an oblique opening to cooperate with the latch 412 .

[0072] According to some preferred embodiments of the present invention, the head of the latch 412 is in a conical shape.

[0073] According to some preferred embodiments of the present invention, after the load-bearing platform 1 stops sending signals, the conical surface of the pin 412 and the oblique mouth of the positioning sleeve 111 are used to guide the positioning. The positioning is first guided and then dropped, and the rhythm is smoother and more reasonable. The problem of inaccurate positioning caused by rebound due to large inertia of movement after the overweight object slows down to a stop can be solved.

[0074] Figure 6 It is a structural schematic diagram of the third hydraulic cylinder of the mobile workbench of the upsetting hydraulic press provided by the present invention.

[0075] According to the present invention, a movable workbench suitable for an upsetting hydraulic press is provided, such as Figure 1 and Figure 6 As shown, the first push rod 31 and the second push rod 32 are connected to the load-bearing platform 1 by using floating hinge supports.

[0076] In this embodiment, a floating hinge support is adopted to prevent the first push rod 31 and the second push rod 32 from being subjected to bending force when the load-bearing platform 1 is raised or lowered.

[0077] According to some embodiments of the present invention, the first push rod 31 and the second push rod 32 are both the third hydraulic cylinder 33, and the piston rod 331 of the third hydraulic cylinder is an internal hollow end solid structure. The working oil can directly act on the end closest to the actuator load-bearing platform 1, and the stability of the piston rod 331 of the third hydraulic cylinder when under pressure during operation is fully considered; further, the piston rod and the cylinder head guide sleeve 24 constitute a double-point support to overcome its own cantilever gravity when the long stroke is extended; the middle part of the cylinder body 332 of the third hydraulic cylinder adopts a hinge shaft support embedded in the bracket 6, and the tail end hinge shaft support is supported on the foundation. When the third hydraulic cylinder 33 of this structure is working, the hydraulic reaction force is transmitted to the bracket 6 through the cylinder body 332 of the third hydraulic cylinder and the middle hinge shaft support. The foundation only bears the supporting force without additional horizontal shear force, thereby avoiding the need to pre-embed a complex steel structure at the connection with the cylinder body during foundation construction.

[0078] According to some embodiments of the present invention, the bracket 6 is an integral welded structure with sufficient rigidity and high strength. On the one hand, it can meet the load-bearing requirements of the thousand-ton load-bearing platform 1, and on the other hand, it can also resist the horizontal shear force generated by the oil when the pushing device 3 is working; the guide plate is nested and positioned on the bracket 6 by slotting to prevent the guide plate from shifting sideways due to the lateral force of the load and causing the mounting screws to be sheared. At the same time, the guide plate screw mounting hole adopts a large-diameter, beveled cutting edge form to prevent the edges of the guide plate countersunk holes from being pressed and crushed when the large-tonnage load-bearing platform 1 passes by.

[0079] The technical solution of the present invention is further explained below in conjunction with a specific embodiment. It should be noted that this specific embodiment is only for those skilled in the art to better understand the technical solution of the present invention, and should not be regarded as an unreasonable limitation on the protection scope of the present invention.

[0080] Embodiment 1 Separate dismantling and maintenance steps for the lifting device: 1. First, remove the upper super nut; 2. Pull out the anti-rotation pin between the load-bearing platform and the guide rod. The anti-rotation pin penetrates the step hole of the load-bearing platform and can be pulled out from above; 3. Remove the upper screw rod; 4. After the upper screw rod is removed, the guide rod together with the lower screw rod and the lower super nut can fall onto the vehicle body; the upper end of the guide rod is lower than the lower end surface of the two wings of the load-bearing platform; 5. The lifting device can be pulled out separately from under the load-bearing platform for assembly; 6. Complete the inspection.

[0081] Embodiment 2 The working process of the mobile workbench applicable to the upsetting hydraulic press is as follows: After the load-bearing platform is fixedly connected to the jacking devices at the four corners, the first hydraulic cylinder lifts the load-bearing platform, and the first push rod and the second push rod push the load-bearing platform to move. The load-bearing platform drives the lifting device to move along the guide rail to the upper end of the lower beam, and the positioning pin assembly is actuated. The second hydraulic cylinder lifts up, and the pin is inserted into the positioning hole for positioning and correction. After correction, the first hydraulic cylinder falls, and the load-bearing platform falls to start working. After the work is completed, the second hydraulic cylinder falls to pull out the pin, and the first hydraulic cylinder lifts the load-bearing platform, and the first push rod and the second push rod act at the same time to move the load-bearing platform out.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A mobile workbench suitable for an upsetting hydraulic press, characterized in that: include: Load-bearing platform, lifting device, pushing device, lower beam and guide rail; The lifting device comprises a first hydraulic cylinder, a vehicle body and rollers, wherein the first hydraulic cylinder is arranged at the center of the vehicle body, the top of the first hydraulic cylinder is connected to the load-bearing platform, the top of the vehicle body is detachably connected to the load-bearing platform, the bottom of the vehicle body is provided with rollers, the rollers are rollingly connected to the vehicle body, and the lifting device comprises at least two groups, which are arranged on both sides of the load-bearing platform; The guide rail is arranged on the top of the lower cross beam, and the pushing device includes a first push rod and a second push rod. The first push rod is arranged at the tail end of the load-bearing platform, and the second push rod is arranged at the front end of the load-bearing platform. The first push rod and the second push rod push the load-bearing platform and the roller to move along the guide rail.

2. The movable workbench suitable for an upsetting hydraulic press according to claim 1, characterized in that: The lifting device also includes a guide sleeve and a guide column. The guide sleeve is fixedly connected to the vehicle body. The guide column passes through the guide sleeve and is slidably connected to the guide sleeve. The top end of the guide column is fixedly connected to the load-bearing platform.

3. The movable workbench suitable for an upsetting hydraulic press according to claim 2, characterized in that: The lifting device also includes a limit block, which is arranged at the bottom end of the guide column and fixedly connected to the guide column.

4. The movable workbench suitable for an upsetting hydraulic press according to claim 1, characterized in that: The jacking device is provided with four groups, which are respectively arranged at the lower ends of the four corners of the load-bearing platform to support the load-bearing platform.

5. The movable workbench suitable for an upsetting hydraulic press according to claim 1, characterized in that: A circular ring is fixedly arranged on the outer side wall of the roller, the circular ring is arranged perpendicular to the axial direction of the roller and is matched with the groove on the top surface of the guide rail.

6. The movable workbench for an upsetting hydraulic press according to claim 1, characterized in that: The vehicle body includes a first shell, a first hydraulic cylinder is arranged inside the first shell, and a first side wall of the first shell is detachably connected to a bottom plate of the first shell.

7. The movable workbench for an upsetting hydraulic press according to claim 1, characterized in that: The lifting device also includes a support assembly, which includes a support plate and a support plug plate. The support plate is fixedly connected to the top surface of the vehicle body, and the support plug plate is arranged on the top of the support plate and is detachably connected to the support plate.

8. The movable workbench for an upsetting hydraulic press according to claim 1, characterized in that: The lifting device also includes a cleaning component, which is fixedly connected to the lower bottom surface of the vehicle body and is used for cleaning dust on the guide rail.

9. The movable workbench suitable for an upsetting hydraulic press according to claim 1, characterized in that: A positioning hole is arranged on the bottom surface of the load-bearing platform, and a positioning pin assembly is arranged on the top of the lower cross beam, and the positioning hole cooperates with the positioning pin assembly.

10. The movable workbench suitable for an upsetting hydraulic press according to claim 1, characterized in that: The first push rod and the second push rod are connected to the load-bearing platform by using floating hinge supports.

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