Positioning mould for welding crank arm lever
By working together with the positioning and fixing components, the problem of position control during the welding of the crank arm lever was solved, achieving precise positioning, ensuring welding quality and efficiency, and reducing operation difficulty and cost.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-15
- Publication Date
- 2026-03-31
AI Technical Summary
During the manufacturing process of steel structure double-leaf protective airtight doors, it is difficult to accurately control the relative position of the curved arm lever during welding, resulting in deviations after welding and affecting the normal opening and closing of the door.
A positioning welding fixture that uses positioning and fixing components to work together achieves pre-positioning of the crank arm lever through positioning shaft and bushing, and uses bolts and threaded connections with the base plate to fix the fixing lug of the crank arm lever, ensuring accurate positioning of the relative position.
It achieves precise positioning during the welding of the articulated lever, avoids welding deviation, improves welding accuracy and stability, simplifies the operation process, and reduces processing costs.
Smart Images
Figure CN224059042U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of articulated lever assembly technology, and in particular to a positioning jig for welding articulated levers. Background Technology
[0002] In the manufacturing process of steel structure double-leaf protective airtight doors, all double-leaf protective airtight doors are equipped with crank levers. The opening and closing of the protective airtight door is controlled by the crank levers. The crank levers are generally composed of a sleeve and two ears. During welding, it is necessary to ensure the relative position of the crank levers. The traditional welding method is usually to first roughly place the crank levers in place, and then the welder determines the relative position of the crank levers by visual observation before welding. Due to the lack of effective positioning methods, it is difficult to accurately control the relative position of the crank levers, resulting in a deviation between the relative position of the crank levers after welding and the requirements of the drawings, which in turn affects the normal opening and closing of the protective airtight door. Summary of the Invention
[0003] In view of this, this application proposes a positioning jig for welding a curved arm lever, which is suitable for fixing the position of the curved arm lever when welding it to the door leaf; it includes: a base plate, a positioning component and a fixing component;
[0004] The positioning assembly includes a positioning shaft and a bushing; the positioning shaft is fixedly mounted on the base plate, and the length direction of the positioning shaft is perpendicular to the plane of the base plate; the bushing is rotatably sleeved on the positioning shaft, and the bushing matches the sleeve hole of the crank lever to pass through the sleeve hole.
[0005] The fixing components include bolts and washers; the washers are fixedly mounted on the base plate and adjacent to the positioning shaft, and the washers are suitable for supporting the fixing lugs of the crank lever. The bolts pass through the washers and are threaded to the base plate, and the bolts are suitable for passing through the fixing lug holes of the crank lever.
[0006] In one possible implementation, there are two fixing components; the two fixing components are arranged adjacent to the positioning component, the pads of the two fixing components are adapted to support the two fixing lugs of the crank lever respectively, and the bolts of the two fixing components are adapted to pass through the two fixing lug holes of the crank lever respectively.
[0007] In one possible implementation, the positioning shaft includes a positioning rod and a locking rod; the positioning rod is fixedly connected to the base plate, and a bushing is fitted onto the positioning rod; the end of the positioning rod away from the base plate is fixedly connected to the locking rod, and the locking rod and the positioning rod are coaxially arranged.
[0008] In one possible implementation, a pressure plate is also included; the pressure plate is sleeved on the locking rod, and the pressure plate is suitable for placement on the sleeve of the crank lever.
[0009] In one possible implementation, it also includes: a nut; the locking rod has external threads, and the nut is fitted onto the locking rod and threadedly connected to the locking rod.
[0010] In one possible implementation, the base plate has a rectangular plate-like structure.
[0011] In one possible implementation, a flat washer is also included; the flat washer is fitted onto the bolt and fits tightly against the bolt head.
[0012] Beneficial effects of this application
[0013] When welding the crank arm lever, the sleeve of the crank arm lever is fitted onto the bushing. The sleeve of the crank arm lever is pre-positioned with the positioning shaft through the bushing. The crank arm lever rotates around the positioning shaft, thereby adjusting the fixing ear to the position corresponding to the pad. One end of the bolt passes through the fixing ear of the crank arm lever and the pad in sequence and is then threaded to the base plate. By tightening the bolt, the bolt and the base plate cooperate to generate a tightening force, thereby firmly fixing the fixing ear to the base plate. After aligning the positioning welding jig with the reserved installation position on the door leaf, the relative position of the crank arm lever can be accurately positioned during welding. During the welding process, the positioning component and the fixing component work together to fix the crank arm lever on the positioning welding jig, avoiding displacement of the crank arm lever during the welding process and causing welding deviation.
[0014] This application achieves precise positioning of the crank arm lever during welding by setting up positioning and fixing components. The positioning and fixing components work together to achieve precise positioning of the relative position of the crank arm lever. This effectively avoids the deviation caused by the difficulty in controlling the position in traditional welding methods, ensuring that the welded crank arm lever meets the dimensions and relative position requirements of the drawings. This improves the welding accuracy of the crank arm lever and the door leaf. The positioning welding jig of this application is easy to operate. Simply put the sleeve of the crank arm lever on the bushing, rotate it around the positioning shaft to adjust the position of the fixing ear, and then tighten it with bolts to complete the positioning. There is no need to spend a lot of time and effort to adjust the relative position of the crank arm lever. The whole process is simple and quick, reduces the difficulty of operation, and improves work efficiency. Moreover, the positioning welding jig of this application has a simple and sturdy structure, can be reused, and has low processing cost.
[0015] Other features and aspects of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description
[0016] The accompanying drawings, which are included in and form part of this specification, illustrate exemplary embodiments, features, and aspects of this application together with the specification and serve to explain the principles of this application.
[0017] Figure 1 This application shows a front view of the positioning fixture for welding the crank arm lever;
[0018] Figure 2 A top view of the positioning fixture for welding the crank arm lever of this application is shown;
[0019] Figure 3 A front view showing the crank lever fixed to a welding positioning fixture;
[0020] Figure 4 A schematic diagram of the crank lever is shown. Detailed Implementation
[0021] Various exemplary embodiments, features, and aspects of this application will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.
[0022] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model or simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0024] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.
[0025] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this application can be implemented without certain specific details. In some instances, methods, means, components, and circuits well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.
[0026] This application proposes a positioning fixture for welding a crank arm lever, suitable for fixing its position during welding of the crank arm lever to the door leaf; such as Figures 1 to 4 As shown, the assembly includes: a base plate 100, a positioning component 200, and a fixing component 300; the positioning component 200 includes a positioning shaft and a bushing 220; the positioning shaft is fixedly installed on the base plate 100, and the length direction of the positioning shaft is perpendicular to the plane where the base plate 100 is located; the bushing 220 is rotatably sleeved on the positioning shaft, and the bushing 220 matches the sleeve hole 410 of the crank arm lever to pass through the sleeve hole; the fixing component 300 includes a bolt 310 and a washer 320; the washer 320 is fixedly installed on the base plate 100 and adjacent to the positioning shaft; the washer 320 is suitable for supporting the fixing lug 420 of the crank arm lever; the bolt 310 passes through the washer 320 and is threadedly connected to the base plate 100, and the bolt 310 is suitable for passing through the fixing lug 420 hole of the crank arm lever.
[0027] It should be noted here that, as Figure 4 As shown, a curved lever typically consists of a sleeve 410 and two fixed lugs 420, as... Figures 1 to 3 As shown, the base plate 100 is suitable for providing a stable installation foundation for the overall equipment; the positioning shaft is vertically fixed on the base plate 100, which provides a precise pre-positioning reference for the sleeve 410 of the crank arm lever, so that the axis of the sleeve 410 of the crank arm lever coincides with the axis of the positioning shaft, avoiding welding deviations caused by eccentricity or tilting of the crank arm lever during welding, and ensuring the positional accuracy of the crank arm lever during welding with the door leaf. The bushing 220 can rotate freely around the positioning shaft, so that the angle of the crank arm lever can be adjusted according to actual needs before welding, ensuring that the crank arm lever can be accurately positioned at the required welding angle. At the same time, the rotatable design of the bushing 220 reduces the gap between the sleeve 410 of the crank arm lever and the positioning shaft. Through direct contact and friction, the pad 320 provides a stable support surface for the fixed lug 420 of the crank lever, ensuring that the fixed lug 420 maintains the correct position and orientation during welding and preventing the crank lever from tilting during welding. The base plate 100 has threaded holes that match the bolts 310. The bolts 310 pass through the holes of the fixed lug 420 and the pad 320 in sequence and are threadedly connected to the base plate 100. By tightening the bolts 310, the crank lever is secured to the pad 320, thereby fixing the fixed lug of the crank lever. The design of the bolts 310 allows for adjustment of the clamping force on the fixed lug 420 as needed, ensuring that the crank lever maintains a fixed position during welding.
[0028] When welding the crank arm lever, the sleeve 410 of the crank arm lever is fitted onto the bushing 220. The sleeve 410 of the crank arm lever is pre-positioned with the positioning shaft through the bushing 220. The crank arm lever rotates around the positioning shaft, thereby adjusting the fixing ear 420 to the position corresponding to the pad 320. One end of the bolt 310 passes through the fixing ear 420 and the pad 320 of the crank arm lever in sequence and is threaded to the base plate 100. By tightening the bolt 310, the bolt 310 and the base plate 100 cooperate to generate a tightening force, thereby firmly fixing the fixing ear 420 to the base plate 100. After aligning the positioning welding fixture with the reserved installation position on the door leaf, the relative position of the crank arm lever can be accurately positioned during welding. During the welding process, the positioning component 200 and the fixing component 300 work together to fix the crank arm lever on the positioning welding fixture, avoiding displacement of the crank arm lever during the welding process and causing welding deviation.
[0029] This application achieves precise positioning of the crank arm lever during welding by setting a positioning component 200 and a fixing component 300. The positioning component 200 and the fixing component 300 work together to achieve precise positioning of the relative position of the crank arm lever during welding. This effectively avoids the deviation caused by the difficulty in controlling the position in traditional welding methods, ensuring that the welded crank arm lever meets the dimensions and relative position requirements of the drawings. This improves the welding accuracy of the crank arm lever and the door leaf. The positioning welding fixture of this application is easy to operate. Simply put the sleeve 410 of the crank arm lever on the bushing 220, rotate the fixing ear 420 around the positioning shaft to adjust the position, and then tighten it with bolts 310 to complete the positioning. There is no need to spend a lot of time and effort to adjust the relative position of the crank arm lever. The whole process is simple and quick, reduces the difficulty of operation, and improves work efficiency. Moreover, the positioning welding fixture of this application has a simple and sturdy structure, can be reused, and has low processing cost.
[0030] Furthermore, bolt 310 adopts the existing technology model 2-M16X50 bolt 310.
[0031] In one possible implementation, such as Figure 2As shown, two fixing components 300 are provided; the two fixing components 300 are arranged adjacent to the positioning component 200. The pads 320 of the two fixing components 300 are adapted to support the two fixing ears 420 of the crank arm lever respectively, and the bolts 310 of the two fixing components 300 are adapted to pass through the holes of the two fixing ears 420 of the crank arm lever respectively. It should be noted that the relative positions of the two fixing components 300 and the positioning component 200 match the relative positions of the sleeve 410 of the crank arm lever and the two fixing ears 420. The two fixing components 300 fix the two fixing ears 420 of the crank arm lever respectively, and apply a fastening force to the crank arm lever from two different points. They also form a stable triangular support structure with the positioning component 200, which effectively prevents the crank arm lever from shaking and shifting during the welding process, ensuring that the crank arm lever always remains in a precise position during welding, and improving the stability and welding accuracy of the crank arm lever welding.
[0032] In one possible implementation, such as Figure 1 , Figure 3 As shown, the positioning shaft includes a positioning rod 211 and a locking rod 212; the positioning rod 211 is fixedly connected to the base plate 100, and the bushing 220 is sleeved on the positioning rod 211; the end of the positioning rod 211 away from the base plate 100 is fixedly connected to the locking rod 212, and the locking rod 212 and the positioning rod 211 are coaxially arranged.
[0033] It should be noted that the positioning rod 211 is fixedly connected to the base plate 100. The positioning rod 211 provides a positioning base for the bushing 220, and thus provides an accurate positioning reference for the sleeve 410 of the crank arm lever, ensuring that the crank arm lever has a fixed and accurate installation position on the fixture, which is convenient for alignment with the welding position on the door leaf. The locking rod 212 is used to extend the length of the positioning rod 211, so as to accommodate sleeves 410 of different specifications of crank arm levers. The design of the locking rod 212 and the positioning rod 211 being coaxial avoids the positioning error of the locking rod 212 when extending the length of the positioning rod 211, ensuring that the positioning reference of the crank arm lever on the fixture remains unchanged. At the same time, when it is necessary to lock the crank arm lever on the positioning rod 211, the positioning rod 211 provides an installation base for the workpiece that locks the sleeve 410 of the crank arm lever.
[0034] In one possible implementation, such as Figure 1 , Figure 3As shown, it also includes: a pressure plate 230; the pressure plate 230 is sleeved on the locking rod 212, and the pressure plate 230 is suitable for being placed on the sleeve 410 of the crank arm lever. It should be noted that the main body of the pressure plate 230 is a circular sheet structure, and the size of the pressure plate 230 is larger than the diameter of the sleeve 410 of the crank arm lever. A through hole is opened at the axis of the pressure plate 230. The pressure plate 230 is sleeved on the locking rod 212 through the through hole and fits tightly with the sleeve 410 of the crank arm lever. The pressure plate 230 generates downward pressure, thereby making the sleeve 410 of the crank arm lever more firmly fixed on the positioning rod 211, preventing the sleeve 410 from moving up and down along the axial direction of the positioning rod 211 during the welding process, and ensuring the positioning accuracy and stability of the crank arm lever.
[0035] In one possible implementation, such as Figure 1 , Figure 3 As shown, it also includes: a nut 240; the locking rod 212 has external threads, and the nut 240 is sleeved on the locking rod 212 and threadedly connected to the locking rod 212. It should be noted that the nut 240 is sleeved on the locking rod 212 with external threads and threadedly connected to it, and the nut 240 is located on the side of the pressure plate 230 away from the sleeve 410 of the crank arm lever. By tightening the nut 240, the pressure plate 230 evenly distributes the pressure applied by the nut 240 on the sleeve 410 of the crank arm lever. The nut 240 and the base plate 100 cooperate to provide sufficient clamping force, thereby fixing the sleeve 410 of the crank arm lever on the positioning rod 211. This avoids the crank arm lever from axially displacing along the positioning rod 211 during the welding process, which would cause the relative position of the crank arm lever after welding to deviate from the drawing requirements, thus ensuring the welding quality.
[0036] Furthermore, the nut 240 is an M20 nut 240 as used in the prior art, and the bolt 310 is a 2-M16X50 bolt 310 as used in the prior art.
[0037] In one possible implementation, such as Figure 2 As shown, the main body of the base plate 100 is a rectangular plate structure; the rectangular plate structure of the base plate 100 has good mechanical properties and is not easily deformed or damaged when subjected to large pressure and tension. Moreover, the rectangular plate structure has a simple processing technology and low cost.
[0038] In one possible implementation, such as Figure 1 , Figure 3 As shown, it also includes a flat washer 330; the flat washer 330 is fitted onto the bolt 310 and fits tightly against the bolt head of the bolt 310. It should be noted that the flat washer 330 is used to increase the contact area between the bolt 310 and the fixing lug 420, to distribute the pressure of the bolt 310 on the fixing lug 420, and to avoid local damage to the fixing lug 420 due to pressure concentration when the bolt 310 is tightened.
[0039] Furthermore, the flat washer 330 is made of elastic material. The elastic flat washer 330 can compensate for the gap between the bolt head and the fixing ear of the bolt 310, so that the tightening force of the bolt 310 can be more effectively transmitted to the fixing ear. This ensures that the crank lever is always firmly fixed on the positioning welding jig during the welding process, thereby improving the stability and reliability of the welding work.
[0040] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.
Claims
1. A positioning fixture for a curved arm lever welding, which is suitable for position fixing of a curved arm lever when it is welded with a door leaf; characterized in that, The utility model relates to a fixing device for curved arm lever, which comprises a base plate, a positioning assembly and a fixing assembly. The positioning assembly comprises a positioning shaft and a shaft sleeve; the positioning shaft is fixedly installed on the base plate, and the body length direction of the positioning shaft is perpendicular to the plane where the base plate is located; the shaft sleeve is rotatably sleeved on the positioning shaft, and the shaft sleeve is matched with the sleeve head hole of the curved arm lever to penetrate into the sleeve head hole. The fixing assembly comprises a bolt and a backing plate; the backing plate is fixedly arranged on the base plate and arranged adjacent to the positioning shaft; the backing plate is suitable for supporting the fixing lug of the curved arm lever; the bolt is screwed with the base plate through the backing plate, and the bolt is suitable for penetrating into the fixing lug hole of the curved arm lever. The fixing assembly is provided with two.
2. The positioner jig for a wrist lever welding according to claim 1, wherein The two fixing assemblies are arranged adjacent to the positioning assembly; the backing plates of the two fixing assemblies are suitable for supporting the two fixing lugs of the curved arm lever respectively; and the bolts of the two fixing assemblies are suitable for penetrating into the two fixing lug holes of the curved arm lever respectively. The positioning shaft comprises a positioning rod and a locking rod.
3. The positioner jig for a wrist lever welding according to claim 1, wherein The positioning rod is fixedly connected with the base plate, and the shaft sleeve is sleeved on the positioning rod; The end of the positioning rod away from the base plate is fixedly connected with the locking rod, and the locking rod is coaxially arranged with the positioning rod. Further comprising:
4. The positioner jig for crank arm lever welding according to claim 3, characterized by a pressing plate; The pressing plate is sleeved on the locking rod, and the pressing plate is suitable for being placed on the sleeve head of the curved arm lever. Further comprising:
5. The positioner jig for crank arm lever welding according to claim 4, characterized by a nut; The locking rod is provided with external threads, the nut is sleeved on the locking rod and is screwed with the locking rod. The main body of the base plate is in the form of a rectangular plate structure.
6. The positioner jig for a wrist lever welding according to claim 1, wherein Further comprising a flat pad; 7. The positioner fixture for welding of a bell crank lever according to claim 1, wherein The flat pad is sleeved on the bolt and closely adheres to the bolt head.