Lower frame assembling tool

Abstract

The utility model discloses a lower frame assembly tool, and relates to the technical field of assembly tools, in particular to a lower frame assembly tool which comprises a machining table and a lower frame, a fixing mechanism is arranged on the machining table and used for fixing the lower frame, and the fixing mechanism comprises a pressing assembly, a clamping assembly and a clamping assembly. Comprising a vertical frame installed in the center of the top of a machining table, a first air cylinder installed in the vertical frame, a rack column installed at the output end of the first air cylinder, a shaft base installed at the top of the vertical frame, pressing plates hinged to the four ends in the shaft base, gears fixed to the interiors of the inner ends of the pressing plates, and buffer pads installed at the bottoms of the pressing plates, the fixing assembly is arranged on the machining table and used for reinforcing the fixed lower vehicle frame; according to the utility model, positioning is carried out firstly and then fixing is carried out, and pressing fixing and clamping fixing are combined, so that the stress distribution of the lower frame in the tool is optimized, and local deformation or damage caused by overlarge single-point stress is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of assembly tooling, in particular to an assembly tooling for a lower frame. Background Art

[0002] In the field of workpiece machining and assembly, the lift truck frame includes the upper frame and the lower frame, which are mostly welded from steel pipes. Currently, the welding process is done by workers measuring the size of each steel pipe with a tape measure, then manually marking and welding.

[0003] After checking the publication number: CN219542190U, a lifting vehicle underframe assembly tooling is disclosed. This technology discloses "a lifting vehicle underframe assembly tooling, including a base plate, the middle part of the top surface of the base plate is raised and positioned and horizontally rotated to support the underframe, one end of the top surface of the base plate is horizontally hung and laterally pulled to position the underframe, and the other end of the top surface of the base plate is clamped and fixed to the underframe; a steel bench is fixed in the middle of the base plate, and a lifting column is vertically fixed on the steel bench; a support plate is coaxially rotatably sleeved on the top surface of the lifting column, a pin rod is vertically fixed on one side of the top surface of the support plate, and a hook limit plate radially extending from the support plate is fixed on the other side of the top surface of the support plate" and other technical solutions, which have the functions of "suspending the underframe of the lifting vehicle in the middle, pinning and pulling and fixing the end, supporting the bottom of the front end and clamping and positioning on both sides, and the welding positioning accuracy and welding efficiency are significantly better than the existing technology";

[0004] When the lower frame assembly tooling in the above solution is used, the lower frame is positioned and then fixed by means of horizontal clamps. However, since the shape and weight distribution of the lower frame may be uneven, the horizontal clamps may not provide uniformly distributed clamping force, which may cause the lower frame to move or deform during subsequent welding processing. Utility Model Content

[0005] In response to the shortcomings of the existing technology, the utility model provides a lower frame assembly tooling, which has the characteristics of optimizing the force distribution of the lower frame in the tooling by first positioning and then fixing, and combining compression fixation and clamping fixation, thereby avoiding local deformation or damage caused by excessive force on a single point.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a lower frame assembly tool, including a processing table and a lower frame, the processing table is provided with a fixing mechanism and is used to fix the lower frame, the fixing mechanism includes:

[0007] The clamping assembly includes a stand mounted at the center of the top of the processing table, a first cylinder mounted inside the stand, a rack column mounted at the output end of the first cylinder, a shaft seat mounted on the top of the stand, a pressure plate hinged at all four ends inside the shaft seat, a gear fixed inside the inner end of the pressure plate, the gear meshing with the rack column for transmission, and a buffer pad mounted at the bottom of the pressure plate;

[0008] A fixing assembly is provided on the processing table and is used to reinforce the fixed lower frame;

[0009] The positioning assembly is arranged on the processing table and is used to position the lower frame.

[0010] Preferably, the fixing assembly includes a mounting bracket installed at the four corners of the top of the processing table, a second cylinder installed at the outer end of the mounting bracket, a mounting seat fixed to the output end of the second cylinder, and a quadrangular pyramid fixing head installed on the surface of the mounting seat.

[0011] Preferably, the fixing assembly further includes second threaded holes opened at four corners inside the second threaded hole, and second mounting holes opened at four corners inside the quadrangular pyramid fixing head.

[0012] Preferably, the positioning assembly includes positioning seats installed at the four corners of the top of the processing table, and positioning pins installed at the upper ends of the positioning seats.

[0013] Preferably, the clamping assembly further includes first threaded holes opened at the four corners of the top of the stand, and first mounting holes opened at the four corners inside the shaft seat.

[0014] Preferably, the four bottom corners of the processing table are all fixed with supporting feet, and the four top corners of the processing table are all fixed with hooks.

[0015] Beneficial effects

[0016] The utility model provides a lower frame assembly tool. Compared with the existing technology, it has the following advantages:

[0017] (1) The lower frame is positioned by the positioning seat and the positioning pin, and then the rack column is driven to move upward by the output end of the first cylinder, and the rack column drives the pressure plate to turn downward through the gear until the buffer pad on the pressure plate presses the lower frame downward; then the quadrangular platform fixing head on the mounting seat is driven by the output end of the second cylinder to clamp the lower frame; by positioning first and then fixing, and combining pressing fixation with clamping fixation, the force distribution of the lower frame in the tooling is optimized to avoid local deformation or damage caused by excessive force on a single point.

[0018] (2) The quadrangular pyramid fixing head can be fixed on the second threaded hole of the mounting seat by means of a bolt through the second mounting hole, so that the quadrangular pyramid fixing head and the mounting seat can be disassembled and assembled; the axle seat can be fixed on the first threaded hole of the vertical frame by means of a bolt through the first mounting hole, so that the axle seat and the vertical frame can be disassembled and assembled; the fixing mechanism is modular in design, and by replacing or combining different modules, customized production of the lower frame can be easily achieved to meet different production needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1It is a schematic diagram of the three-dimensional structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the split structure of the utility model;

[0021] Figure 3 This is a schematic diagram of the disassembled structure of the compression assembly in the present utility model;

[0022] Figure 4 This is a schematic diagram of the internal structure of the compression assembly in the present invention;

[0023] Figure 5 This is a schematic diagram of the disassembled structure of the fixed component in the utility model.

[0024] In the figure: 1. Processing table; 2. Fixing mechanism; 21. Clamping assembly; 211. Stand; 212. First cylinder; 213. Rack column; 214. Axle seat; 215. Pressing plate; 216. Gear; 217. Buffer pad; 218. First threaded hole; 219. First mounting hole; 22. Fixing assembly; 221. Mounting frame; 222. Second cylinder; 223. Mounting seat; 224. Square pyramid fixing head; 225. Second threaded hole; 226. Second mounting hole; 23. Positioning assembly; 231. Positioning seat; 232. Positioning pin; 3. Lower frame; 4. Support leg; 5. Hook. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] See also Figure 1-5 The utility model provides a technical solution for a lower frame assembly tool: a lower frame assembly tool, comprising a processing table 1 and a lower frame 3, a fixing mechanism 2 is provided on the processing table 1 and is used to fix the lower frame 3, and the fixing mechanism 2 includes:

[0027] The clamping assembly 21 includes a stand 211 mounted in the center of the top of the processing table 1, a first cylinder 212 mounted inside the stand 211, a rack column 213 mounted at the output end of the first cylinder 212, a shaft seat 214 mounted on the top of the stand 211, a pressure plate 215 with four hinged ends inside the shaft seat 214, a gear 216 fixed inside the inner end of the pressure plate 215, and the gear 216 is meshed with the rack column 213 for transmission, and a buffer pad 217 is mounted on the bottom of the pressure plate 215;

[0028] A fixing assembly 22 is provided on the processing table 1 and is used to reinforce the fixed lower frame 3;

[0029] The positioning assembly 23 is disposed on the processing table 1 and is used to position the lower frame 3 .

[0030] In this embodiment, when the lower frame 3 is placed on the processing table 1, the clamping assembly 21 passes through the interior of the lower frame 3. After the lower frame 3 is positioned by the positioning assembly 23, the output end of the first cylinder 212 drives the rack column 213 to move upward, and the rack column 213 drives the pressure plate 215 to turn downward through the gear 216 until the buffer pad 217 on the pressure plate 215 presses the lower frame 3 downward. The automated clamping and fixing simplifies the assembly process, reduces the difficulty of operation, and enables the operator to complete the assembly more quickly and accurately.

[0031] Specifically, the fixing assembly 22 includes a mounting bracket 221 installed at the four corners of the top of the processing table 1, a second cylinder 222 installed at the outer end of the mounting bracket 221, a mounting seat 223 fixed to the output end of the second cylinder 222, and a quadrangular pyramid fixing head 224 installed on the surface of the mounting seat 223.

[0032] In this embodiment, after the lower frame 3 is pressed and fixed on the processing table 1, the output end of the second cylinder 222 drives the quadrangular platform fixing head 224 on the mounting seat 223 to clamp and fix the lower frame 3, thereby further eliminating slight deviations and reducing errors caused by vibration or human factors during the assembly process.

[0033] Specifically, the fixing assembly 22 further includes second threaded holes 225 formed at four corners inside the second threaded hole 225 , and second mounting holes 226 formed at four corners inside the quadrangular pyramid fixing head 224 .

[0034] In this embodiment, the quadrangular pyramid fixing head 224 can be fixed on the second threaded hole 225 of the mounting seat 223 through the second mounting hole 226 with a bolt, so that the quadrangular pyramid fixing head 224 and the mounting seat 223 can be disassembled.

[0035] Specifically, the positioning assembly 23 includes positioning seats 231 installed at the four corners of the top of the processing table 1 and positioning pins 232 installed at the upper ends of the positioning seats 231.

[0036] In this embodiment, when the lower frame 3 is placed on the processing table 1 , it is first positioned by the positioning seat 231 in cooperation with the positioning pin 232 to ensure that the position is accurate during subsequent fixing.

[0037] Specifically, the pressing assembly 21 further includes first threaded holes 218 formed at the four corners of the top of the stand 211 and first mounting holes 219 formed at the four corners inside the shaft seat 214 .

[0038] In this embodiment, the shaft seat 214 can be fixed on the first threaded hole 218 of the stand 211 through the first mounting hole 219 with a bolt, so that the shaft seat 214 and the stand 211 can be disassembled.

[0039] Specifically, the four bottom corners of the processing table 1 are fixed with supporting legs 4 , and the four top corners of the processing table 1 are fixed with hanging hooks 5 .

[0040] The working principle and usage process of the present invention are as follows: first, the lower frame 3 is placed on the processing table 1, the clamping assembly 21 passes through the interior of the lower frame 3, and the lower frame 3 is positioned by the positioning seat 231 and the positioning pin 232; then, the rack column 213 is driven to move upward by the output end of the first cylinder 212, and the rack column 213 drives the pressure plate 215 to turn downward through the gear 216 until the buffer pad 217 on the pressure plate 215 presses the lower frame 3 downward; finally, the quadrangular platform fixing head 224 on the mounting seat 223 is driven by the output end of the second cylinder 222 to clamp and fix the lower frame 3.

[0041] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "includes," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0042] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lower frame assembly tool, comprising a processing table (1) and a lower frame (3), characterized in that: The processing table (1) is provided with a fixing mechanism (2) for fixing the lower frame (3), and the fixing mechanism (2) comprises: A clamping assembly (21) comprises a stand (211) mounted at the center of the top of the processing table (1), a first cylinder (212) mounted inside the stand (211), a rack column (213) mounted at the output end of the first cylinder (212), an axle seat (214) mounted on the top of the stand (211), a pressing plate (215) with four hinged ends inside the axle seat (214), a gear (216) fixed inside the inner end of the pressing plate (215), and the gear (216) is meshed with the rack column (213) for transmission, and a buffer pad (217) mounted at the bottom of the pressing plate (215); A fixing assembly (22) is arranged on the processing table (1) and is used to reinforce the fixed lower frame (3); A positioning assembly (23) is arranged on the processing table (1) and is used to position the lower frame (3).

2. The lower frame assembly tool according to claim 1, characterized in that: The fixing assembly (22) comprises a mounting frame (221) mounted at the four corners of the top of the processing table (1), a second cylinder (222) mounted at the outer end of the mounting frame (221), a mounting seat (223) fixed to the output end of the second cylinder (222), and a quadrangular pyramid fixing head (224) mounted on the surface of the mounting seat (223).

3. The lower frame assembly tool according to claim 2, characterized in that: The fixing assembly (22) further includes second threaded holes (225) formed at four corners inside the second threaded hole (225), and second mounting holes (226) formed at four corners inside the quadrangular pyramid fixing head (224).

4. The lower frame assembly tool according to claim 1, characterized in that: The positioning assembly (23) comprises positioning seats (231) mounted at the four corners of the top of the processing table (1), and positioning pins (232) mounted at the upper ends of the positioning seats (231).

5. The lower frame assembly tool according to claim 1, characterized in that: The clamping assembly (21) further includes first threaded holes (218) formed at the four corners of the top of the stand (211), and first mounting holes (219) formed at the four corners inside the shaft seat (214).

6. The lower frame assembly tool according to claim 1, characterized in that: Support legs (4) are fixed at the four bottom corners of the processing table (1), and hooks (5) are fixed at the four top corners of the processing table (1).

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