Narrow space two-hole coaxiality centering movable positioning mechanism
By designing a coaxiality alignment and positioning mechanism for two holes in a narrow space, and using a cylinder to control the movable plate and positioning pin to achieve synchronous clamping and release of the workpiece, the problem of coaxiality positioning of two holes in a narrow space is solved, reducing costs and improving production efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LIUZHOU XINBANG INTELLIGENT TECH CO LTD
- Filing Date
- 2025-07-10
- Publication Date
- 2026-07-07
AI Technical Summary
Existing positioning mechanisms cannot achieve consistent coaxiality positioning and clamping of two holes in a narrow space, resulting in high production costs and low efficiency.
A narrow-space two-hole coaxial alignment and positioning mechanism is designed, including a front-to-back moving component, a left-to-right moving clamping component, and a positioning component. The mechanism uses a cylinder to control the moving plate and the positioning pin to achieve synchronous clamping and release of the workpiece, thus reducing the space requirements.
The system enables the positioning and clamping of two holes in a narrow space to achieve coaxiality, reducing tooling development costs by 30% and increasing production efficiency by 10%.
Smart Images
Figure CN224464027U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a positioning mechanism used in the welding process, and in particular to a movable positioning mechanism for aligning two holes in a narrow space with coaxiality. Background Technology
[0002] Welding is widely used in the production of automobiles and construction machinery. During welding, a positioning mechanism is needed to hold the workpiece to be welded to ensure welding quality and efficiency. For some workpieces with coaxiality requirements, a centering mechanism is needed to ensure coaxiality. This centering mechanism controls the axial relationship of the workpiece throughout the welding process, ensuring geometric accuracy and functionality. For example... Figure 1 When welding the instrument panel bracket B to the inner round tube A of the instrument panel, the shaft holes on both sides of the instrument panel bracket must be coaxial to ensure subsequent assembly. Existing positioning mechanisms with centering mechanisms occupy a large space and cannot complete the positioning and clamping of parts requiring consistent coaxiality of the left and right holes within a limited space. This requires changing the welding process and sequence, resulting in high production costs. Summary of the Invention
[0003] The purpose of this invention is to address the shortcomings of the existing technology by providing a narrow-space two-hole coaxiality alignment movable positioning mechanism, which can achieve positioning and clamping of parts with consistent coaxiality of two holes within a limited narrow space, thereby improving production efficiency.
[0004] The technical solution adopted by this utility model to achieve the above-mentioned objective is as follows: a narrow space two-hole coaxiality centering movable positioning mechanism, including a base plate and a centering movable positioning mechanism mounted on the base plate. The centering movable positioning mechanism includes a front and rear moving assembly, a left and right moving clamping assembly, and a positioning assembly. The front and rear moving assembly is mounted on the base plate and includes front and rear guide rails, front and rear mounting plates, and front and rear cylinder assemblies. The front and rear guide rails are mounted on the base plate, and the front and rear mounting plates are slidably connected to the front and rear guide rails by front and rear sliders. The front and rear cylinder assemblies are connected to the rear end of the base plate by a connecting device, and the piston rods of the front and rear cylinder assemblies are connected to the rear end of the front and rear mounting plates by a connecting device. The left and right moving clamping assembly is mounted on the front and rear mounting plates, and the rear end of the positioning assembly is connected to the front and rear mounting plates. The front end of the positioning assembly extends forward to the middle of the front end of the left and right moving clamping assembly.
[0005] A further technical solution of this utility model is as follows: The left and right moving clamping assembly includes a left guide rail, a left movable plate, a left connecting rod, a left connecting plate, a left clamping block, a left positioning pin, a right guide rail, a right movable plate, a right connecting rod, a right connecting plate, a right clamping block, a right positioning pin, a pull rod, and left and right cylinder assemblies. The left guide rail is installed on the upper left side of the front and rear mounting plates. The left movable plate is slidably connected to the left guide rail via a left slider. The right guide rail is installed on the upper right side of the front and rear mounting plates. The right movable plate is slidably connected to the right guide rail via a right slider. The left and right cylinder assemblies are connected to the rear end of the front and rear mounting plates via a connecting device. The pull rod is set in the gap between the left and right movable plates. The rear end of the pull rod is connected to the left and right cylinder assemblies. The piston rod of the cylinder assembly is connected by a connecting rod. The front end of the connecting rod is hinged to the front ends of the left and right connecting rods via a central rotating shaft. The rear end of the left connecting rod is hinged to the left movable plate via a left rotating shaft, and the rear end of the right connecting rod is hinged to the right movable plate via a right rotating shaft. The left connecting plate is connected to the front end of the left movable plate via a connecting device. The left clamping block is connected to the inner side of the front end of the left connecting plate. The left locating pin is fastened in the mounting hole at the front end of the left clamping block and extends vertically inward. The right connecting plate is connected to the front end of the right movable plate via a connecting device. The right clamping block is connected to the inner side of the front end of the right connecting plate. The right locating pin is fastened in the mounting hole at the front end of the right clamping block and extends vertically inward, with the right locating pin and the left locating pin being positioned opposite each other.
[0006] A further technical solution of this utility model is: the positioning component includes a middle mounting block, a left positioning block and a right positioning block. The rear end of the middle mounting block is connected to the middle position of the front side of the front and rear mounting plates through a connecting device. The front end of the middle mounting block extends forward and upward to the middle of the left clamping block and the right clamping block. The left positioning block and the right positioning block are symmetrically connected on the left and right sides of the front end of the middle mounting block. The side of the left positioning block is provided with a left positioning hole that cooperates with the left positioning pin, and the side of the right positioning block is provided with a right positioning hole that cooperates with the right positioning pin.
[0007] A further technical solution of this utility model is: the rear end of the front and rear cylinder assemblies is provided with a front and rear cylinder assembly handle that can manually control the movement direction of the piston rod of the front and rear cylinder assemblies, and the rear end of the left and right cylinder assemblies is provided with a left and right cylinder assembly handle that can manually control the movement direction of the piston rod of the left and right cylinder assemblies.
[0008] This utility model discloses a two-hole coaxial alignment and positioning mechanism for narrow spaces, which has the following advantages: The workpiece to be welded is positioned on the positioning assembly, and the left and right moving clamping assemblies jointly clamp the workpiece. The left and right cylinder assemblies of the left and right moving clamping assemblies simultaneously pull the left and right connecting rods through the pull rods, thereby pulling the left and right movable plates to move in the left and right directions. This allows the left clamping block at the front end of the left movable plate to position or detach from the workpiece with the left positioning pin, and the right clamping block at the front end of the right movable plate to position or detach from the workpiece with the right positioning pin. The ingenious design of this mechanism allows one cylinder to simultaneously control the left and right positioning pins to clamp the workpiece inward and release it outward, making it very suitable for installation and use in narrow spaces. At the same time, using cylinders to control the movement of the alignment and positioning mechanism is less expensive than using motors. Statistical analysis shows that after adopting this utility model, the tooling development cost for positioning and clamping mechanisms of similar parts is reduced by 30%, and production efficiency is increased by 10%.
[0009] The following description, in conjunction with the accompanying drawings and embodiments, further illustrates the present invention's narrow-space two-hole coaxiality alignment movable positioning mechanism. Attached Figure Description
[0010] Figure 1 This is a three-dimensional structural diagram of a narrow-space two-hole coaxiality alignment movable positioning mechanism for positioning a workpiece to be welded according to the present invention.
[0011] Figure 2 yes Figure 1 The image shows a top view of a narrow-space two-hole coaxial alignment movable positioning mechanism.
[0012] Figure 3 yes Figure 1 The image shows a left view of a narrow-space two-hole coaxial alignment movable positioning mechanism.
[0013] Figure 4 yes Figure 2 A cross-sectional view along the AA direction;
[0014] Explanation of reference numerals: 1-Base plate, 2-Front and rear mounting plates, 3-Left guide rail, 4-Left movable plate, 5-Left connecting plate, 6-Left clamping block, 7-Left positioning pin, 8-Left positioning block, 9-Middle mounting block, 10-Right positioning block, 11-Right positioning pin, 12-Right clamping block, 13-Right connecting plate, 14-Pull rod, 15-Right movable plate, 16-Right guide rail, 17-Left and right cylinder assemblies, 18-Left and right cylinder assembly handles, 19-Front and rear cylinder assembly handles, 20-Front and rear cylinder assemblies, 21-Front and rear guide rails, 22-Left rotating shaft, 23-Left connecting rod, 24-Middle rotating shaft, 25-Right connecting rod, 26-Right rotating shaft, A-Inner round tube of instrument panel, B-Automotive instrument panel bracket. Detailed Implementation
[0015] like Figures 1 to 4 As shown, this utility model discloses a narrow-space two-hole coaxial alignment and positioning mechanism, including a base plate 1 and an alignment and positioning mechanism mounted on the base plate 1. This utility model can be used to position an automotive dashboard bracket B, ensuring that the two side holes of the dashboard bracket B are coaxial when welded to the inner circular tube A of the dashboard. Of course, this utility model can also be used to position other parts that require coaxiality.
[0016] like Figure 1 , Figure 2 As shown, the centering and positioning mechanism includes a front-to-back moving assembly, a left-to-right moving clamping assembly, and a positioning assembly. The front-to-back moving assembly is mounted on the base plate 1 and includes front and rear guide rails 21, front and rear mounting plates 2, and front and rear cylinder assemblies 20. The two front and rear guide rails 21 are mounted parallel to each other on the upper surface of the base plate 1 by screws and pins. The front and rear mounting plates 2 are slidably connected to the two front and rear guide rails 21 by front and rear sliders connected to their bottoms, forming a sliding fit mechanism between the front and rear sliders and the front and rear guide rails 21. The front and rear cylinder assemblies 20 are connected to the rear end of the base plate 1 by a connecting device. The piston rod of the front and rear cylinder assemblies 20 is connected to the rear end of the front and rear mounting plates 2 by the connecting device. The front and rear cylinder assemblies 20 can drive the front and rear mounting plates 2 and all the parts on them to move in the front and rear direction. The rear end of the front and rear cylinder assemblies 20 is provided with a front and rear cylinder assembly handle 19, which can manually control the movement direction of the piston rod of the front and rear cylinder assembly 20. Manually pushing and pulling the front and rear cylinder assembly handle 19 can control the position of the front and rear mounting plates 2.
[0017] like Figure 1 , Figure 2As shown, the left-right moving clamping assembly is mounted on the front and rear mounting plates 2. The rear end of the positioning assembly is connected to the front and rear mounting plates 2, and the front end of the positioning assembly extends forward to the middle of the front end of the left-right moving clamping assembly. In this embodiment, the left-right moving clamping assembly includes a left guide rail 3, a left movable plate 4, a left connecting rod 23, a left connecting plate 5, a left clamping block 6, a left positioning pin 7, a right guide rail 16, a right movable plate 15, a right connecting rod 25, a right connecting plate 13, a right clamping block 12, a right positioning pin 11, a pull rod 14, and left and right cylinder assemblies 17. The two left guide rails 3 are mounted on the upper left side of the front and rear mounting plates 2 by screws and pins, and the left guide rails 3 extend in the left-right direction. The left movable plate 4 is slidably connected to the left guide rail 3 by a left slider. A sliding engagement mechanism is formed between the left slider and the left guide rail 3, and the left movable plate 4 can drive all the parts on it to move in the left-right direction. The right guide rail 16 is installed on the upper right side surface of the front and rear mounting plates 2. The right movable plate 15 is slidably connected to the right guide rail 16 via a right slider. A sliding engagement mechanism is formed between the right slider and the right guide rail 16, allowing the right movable plate 15 to move all its parts in the left and right directions. The left and right cylinder assemblies 17 are connected to the rear end of the front and rear mounting plates 2 via a connecting device. The rear end of the left and right cylinder assemblies 17 is provided with a handle 18 for manually controlling the direction of movement of the piston rods of the left and right cylinder assemblies 17. The pull rod 14 is disposed in the gap between the left movable plate 4 and the right movable plate 15. The rear end of the pull rod 14 is connected to the piston rod of the left and right cylinder assemblies 17. The middle of the front end of the pull rod 14 is hinged to the front end of the left connecting rod 23 and the front end of the right connecting rod 25 via a central rotating shaft 24. The left connecting rod 23, the right connecting rod 25, and the pull rod 14 form a rotating mechanism via the central rotating shaft 24. The left connecting rod 23, the right connecting rod 25, and the pull rod 14 form a hinged linkage mechanism. The rear end of the left connecting rod 23 is hinged to the left movable plate 4 via the left rotating shaft 22. The left connecting rod 23 and the left movable plate 4 form a rotating mechanism via the left rotating shaft 22. The rear end of the right connecting rod 25 is hinged to the right movable plate 15 via the right rotating shaft 26. The right connecting rod 25 and the right movable plate 15 form a rotating mechanism via the right rotating shaft 26.
[0018] like Figure 1 , Figure 2 As shown, the left connecting plate 5 is connected to the front end of the left movable plate 4 via a connecting device (screws, pins, and mounting plate). The left clamping block 6 is connected to the inner side of the front end of the left connecting plate 5 via screws and pins. The left positioning pin 7 is securely installed in the mounting hole at the front end of the left clamping block 6 and extends vertically inward. The right connecting plate 13 is connected to the front end of the right movable plate 15 via a connecting device (screws, pins, and mounting plate). The right clamping block 12 is connected to the inner side of the front end of the right connecting plate 13 via screws and pins. The right positioning pin 11 is securely installed in the mounting hole at the front end of the right clamping block 12 and extends vertically inward. The right positioning pin 11 and the left positioning pin 7 are positioned opposite each other, that is, symmetrically arranged on the left and right sides of the middle mounting block 9. The left clamping block 6 and the right clamping block 12 are also symmetrically arranged on the left and right sides of the middle mounting block 9.
[0019] like Figure 1 , Figure 2 As shown, the positioning assembly includes a central mounting block 9, a left positioning block 8, and a right positioning block 10. The rear end of the central mounting block 9 is connected to the middle of the front side of the front and rear mounting plates 2 via a connecting device. The front end of the central mounting block 9 extends forward and upward to the middle of the left clamping block 6 and the right clamping block 12. The left positioning block 8 and the right positioning block 10 are symmetrically connected to the left and right sides of the front end of the central mounting block 9, respectively, and are installed on the left and right sides of the central mounting block 9 by screws and pins. Simultaneously, the left positioning block 8 is located inside the left clamping block 6, and the right positioning block 10 is located inside the right clamping block 12. The left positioning block 8 has a left positioning hole on its side that mates with the left positioning pin 7, extending vertically to the right from the left end of the left positioning block 8. The right positioning block 10 has a right positioning hole on its side that mates with the right positioning pin 11, extending vertically to the left from the right end of the right positioning block 10.
[0020] like Figures 1 to 4 As shown, during operation, when the handle 18 of the left and right cylinder assemblies is pushed, the piston rods of the left and right cylinder assemblies 17 move forward. Through the action of the left connecting rod 23 and the right connecting rod 25, the left movable plate 4 and the right movable plate 15 are pulled inward, causing the left positioning pin 7 and the right positioning pin 11 at the front to move inward. This positions the two holes (in the left and right direction) of the part (i.e., the car dashboard bracket B) and clamps the part (i.e., the car dashboard bracket B) on the outer side of the left positioning block 8 and the right positioning block 10, completing the positioning and clamping of the part (i.e., the car dashboard bracket B). When the left and right movable cylinder assemblies are retracted, the pull rod 14 drives the left movable plate 4 and the right movable plate 15 to move outward, causing the left clamping block 6, the right clamping block 12, and the left positioning pin 7 and the right positioning pin 11 to move outward, realizing the pin removal and release action. The piston rods of the front and rear cylinder assemblies 20 are fastened to the front and rear mounting plates 2. When the cylinders of the front and rear cylinder assemblies 20 are withdrawn, they drive all the components on the front and rear mounting plates 2 to move backward. The left positioning block 8 and the right positioning block 10 withdraw from the inner cavity of the rear end of the part (i.e., the car dashboard bracket B). When the handles of the front and rear cylinder assemblies 19 are pushed, the piston cylinders of the front and rear cylinder assemblies 20 drive the front and rear mounting plates 2 and all the components on them to move forward. The left positioning block 8 and the right positioning block 10 enter the middle inner cavity of the rear end of the part (i.e., the car dashboard bracket B) for positioning.
[0021] The above embodiments are merely preferred embodiments of this utility model. The structure of this utility model is not limited to the forms listed in the above embodiments. Any modifications, equivalent substitutions, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A narrow-space two-hole coaxiality alignment and positioning mechanism, comprising a base plate (1) and an alignment and positioning mechanism mounted on the base plate (1), characterized in that, The centering and positioning mechanism includes a front-to-back moving component, a left-to-right moving clamping component, and a positioning component. The front-to-back moving component is mounted on the base plate (1). The front-to-back moving component includes front and rear guide rails (21), front and rear mounting plates (2), and front and rear cylinder assemblies (20). The front and rear guide rails (21) are mounted on the base plate (1). The front and rear mounting plates (2) are slidably connected to the front and rear guide rails (21) by front and rear sliders. The front and rear cylinder assemblies (20) are connected to the rear end of the base plate (1) by a connecting device. The piston rod of the front and rear cylinder assemblies (20) is connected to the rear end of the front and rear mounting plates (2) by a connecting device. The left-to-right moving clamping component is mounted on the front and rear mounting plates (2). The rear end of the positioning component is connected to the front and rear mounting plates (2). The front end of the positioning component extends forward to the middle of the front end of the left-to-right moving clamping component.
2. The narrow-space two-hole coaxiality alignment and movable positioning mechanism as described in claim 1, characterized in that, The left and right moving clamping assembly includes a left guide rail (3), a left movable plate (4), a left connecting rod (23), a left connecting plate (5), a left clamping block (6), a left positioning pin (7), a right guide rail (16), a right movable plate (15), a right connecting rod (25), a right connecting plate (13), a right clamping block (12), a right positioning pin (11), a pull rod (14), and left and right cylinder assemblies (17). The left guide rail (3) is installed on the upper left side of the front and rear mounting plates (2). The left movable plate (4) is slidably connected to the left guide rail (3) via a left slider. The right guide rail (16) is installed on the upper right side of the front and rear mounting plates (2). The right movable plate (15) is slidably connected to the right guide rail (16) via a right slider. The left and right cylinder assemblies (17) are connected to the rear end of the front and rear mounting plates (2) via a connecting device. The pull rod (14) is set in the gap between the left movable plate (4) and the right movable plate (15). The rear end of the pull rod (14) is connected to the left and right cylinder assemblies. The piston rod of component (17) is connected, and the middle of the front end of the pull rod (14) is hinged to the front end of the left connecting rod (23) and the front end of the right connecting rod (25) respectively through the middle rotating shaft (24). The rear end of the left connecting rod (23) is hinged to the left movable plate (4) through the left rotating shaft (22), and the rear end of the right connecting rod (25) is hinged to the right movable plate (15) through the right rotating shaft (26). The left connecting plate (5) is connected to the front end of the left movable plate (4) through the connecting device. The left clamping block (6) is connected to the left... The connecting plate (5) is connected to the inner front end. The left positioning pin (7) is fastened in the mounting hole at the front end of the left clamping block (6) and extends vertically inward. The right connecting plate (13) is connected to the front end of the right movable plate (15) through the connecting device. The right clamping block (12) is connected to the inner front end of the right connecting plate (13). The right positioning pin (11) is fastened in the mounting hole at the front end of the right clamping block (12) and extends vertically inward. The right positioning pin (11) and the left positioning pin (7) are in opposite positions.
3. The narrow-space two-hole coaxiality alignment and movable positioning mechanism as described in claim 2, characterized in that, The positioning component includes a middle mounting block (9), a left positioning block (8), and a right positioning block (10). The rear end of the middle mounting block (9) is connected to the middle position of the front side of the front and rear mounting plates (2) through a connecting device. The front end of the middle mounting block (9) extends forward and upward to the middle of the left clamping block (6) and the right clamping block (12). The left positioning block (8) and the right positioning block (10) are symmetrically connected on the left and right sides of the front end of the middle mounting block (9). The left positioning block (8) has a left positioning hole on its side that cooperates with the left positioning pin (7), and the right positioning block (10) has a right positioning hole on its side that cooperates with the right positioning pin (11).
4. The narrow-space two-hole coaxiality alignment and movable positioning mechanism as described in claim 2, characterized in that, The rear end of the front and rear cylinder assemblies (20) is provided with a front and rear cylinder assembly handle (19) that can manually control the movement direction of the piston rod of the front and rear cylinder assemblies (20), and the rear end of the left and right cylinder assemblies (17) is provided with a left and right cylinder assembly handle (18) that can manually control the movement direction of the piston rod of the left and right cylinder assemblies (17).