Four-axis assembly mechanism with positioning structure

Abstract

The utility model is suitable for the technical field of machining equipment, provides four -axis assembly mechanism with positioning structure, including equipment main body, equipment main body includes mounting bracket, placing block, cylinder and pressing plate, and the lower end surface of pressing plate is provided with sliding rod, and sliding rod is inserted in pressing plate and mounting bracket, and placing block has placing groove, and pressing plate is provided with fixed column and moving groove, positioning structure, positioning structure includes locating rod, with shift block, connecting rod and sliding ring, and the both ends of connecting rod are rotatably connected with the side wall of sliding ring and the upper end surface of with shift block, and with shift block is slidably arranged in moving groove, and sliding ring is slidably sleeved in fixed column, in the utility model, the cylinder after starting drives the direction of pressing plate to slide down close to placing groove, sliding ring moves along the fixed column axial direction, with shift block moves to the direction of mutual close, the upper and lower end surfaces and opposite side of work piece are all fixed, to prevent work piece from unevenly sliding or tilting in placing groove.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical processing equipment technology, and in particular relates to a four-axis assembly mechanism with a positioning structure. Background Technology

[0002] A four-axis assembly mechanism is a mechanical device with four motion axes (usually three linear axes X, Y, and Z and one rotary axis A / B / C). It is widely used in CNC machine tools, industrial robots, machining centers and other fields. It uses a CNC system to precisely control the movement of each axis, enabling multi-angle positioning, rotation and processing of workpieces in space, thereby completing the assembly, processing or handling of complex-shaped parts.

[0003] In simple terms, a four-axis assembly mechanism includes three linear axes, one rotary axis, a CNC system, and a fixture. The CNC system controls the movement of the X, Y, and Z linear axes and the rotary axis simultaneously according to a preset program, enabling the tool to process or assemble the workpiece from different angles. The rotary axis allows the workpiece to rotate around a certain axis, which, in conjunction with the linear axis movement, enables the machining of complex curved surfaces, spiral grooves, or multiple surfaces.

[0004] However, the clamping force of existing assembly mechanism fixtures is usually perpendicular to the main positioning reference plane, "pressing" the workpiece onto the reference. If the clamping force has a large horizontal component, this component may push the workpiece to slide or tilt on the positioning surface, resulting in uneven force on the workpiece, tilting or local deformation during clamping. Therefore, a four-axis assembly mechanism with a positioning structure is needed to solve the above problems. Utility Model Content

[0005] The purpose of this utility model embodiment is to provide a four-axis assembly mechanism with a positioning structure to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A four-axis assembly mechanism with a positioning structure includes:

[0008] The main body of the equipment includes a mounting frame, a placement block, a cylinder, and a pressure plate that are detachably mounted on a machine tool. The placement block is fixedly mounted on the upper end face of the mounting frame. The pressure plate is mounted at a predetermined distance above the placement block. A sliding rod is provided on the lower end face of the pressure plate. The sliding rod is inserted into the pressure plate and the mounting frame. The cylinder is mounted between the upper end face and the lower end face of the mounting frame. The output shaft of the cylinder is connected to the sliding rod. The upper end face of the placement block has a placement groove. A fixing column is provided on the upper end face of the pressure plate. The pressure plate also has a pair of moving grooves symmetrically distributed around the axis of the fixing column.

[0009] The positioning structure includes a pair of positioning rods, a pair of moving blocks, a pair of connecting rods, and a sliding ring. The two ends of each connecting rod are rotatably connected to the side wall of the sliding ring and the upper end face of the moving block, respectively. The positioning rods are fixedly installed on the lower end face of the moving block. The pair of positioning rods are arranged on both sides of the placement groove. Each moving block is slidably arranged in each moving groove. The sliding ring is slidably sleeved on the fixed post.

[0010] In a further technical solution, the positioning structure also includes at least one pair of electrically operated telescopic columns, which are arranged opposite each other with the axis of the fixed column as the center, and the two ends of the electrically operated telescopic columns are connected to the lower end face of the sliding ring and the upper end face of the pressure plate.

[0011] In a further technical solution, the positioning structure also includes a pair of plug-in cylinders, each of the positioning rods being slidably plugged into the plug-in cylinder, and the bottom wall of the plug-in cylinder being in contact with the upper end surface of the placement block.

[0012] In a further technical solution, a pair of sliding grooves are provided on the upper end face of the placement block, and a slider is provided on the lower end face of each insertion cylinder. The slider is slidably disposed in the sliding groove, and the axial direction of the sliding groove is parallel to the axial direction of the moving groove.

[0013] In a further technical solution, the positioning rod is provided with a plurality of first locking holes at intervals, and the insertion tube is provided with a plurality of second locking holes at intervals. The plurality of first locking holes and the plurality of second locking holes are spaced at the same intervals and have the same diameter. The positioning structure also includes two sets of locking pins, which are inserted into the first locking holes and the second locking holes.

[0014] In a further technical solution, the positioning structure includes a pair of rotating columns and a pair of connecting plates. Each group of locking columns is provided with multiple locking columns, and each connecting plate is connected to multiple locking columns in each group. The side wall of the insertion cylinder is provided with a pair of sliding rods and a fixing plate. The fixing plate is connected to the pair of sliding rods, and the connecting plate is provided with a pair of sliding holes. The insertion cylinder is provided with a threaded hole on the fixing plate. The end of the rotating column is rotatably connected to the connecting plate, the rotating column is threadedly connected to the threaded hole, and the sliding rod is inserted into the sliding hole.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This invention features a positioning structure comprising a positioning rod, a sliding block, a connecting rod, and a sliding ring. Each connecting rod has its two ends rotatably connected to the sidewall of the sliding ring and the upper end face of the sliding block, respectively. The positioning rod is fixedly installed on the lower end face of the sliding block and positioned on both sides of the placement groove. Each sliding block is slidably positioned in each movement groove, and the sliding ring is slidably sleeved on a fixed post. The worker places the workpiece to be assembled in the placement groove. A cylinder, after activation, drives the pressure plate to slide towards the placement groove. The sliding ring moves axially along the fixed post, and the sliding blocks move along the movement groove towards each other until the positioning rod moves in the same direction, clamping the opposite sides of the workpiece. The upper and lower end faces and opposite sides of the workpiece are fixed to prevent uneven force on the workpiece in the placement groove, thus ensuring a smooth assembly process.

[0017] This invention comprises a plug-in cylinder, a locking pin, a rotating pin, and a connecting plate. Each positioning rod is slidably plugged into the plug-in cylinder, with the bottom wall of the plug-in cylinder abutting against the upper surface of the placement block. The locking pin is plugged into the first locking hole and the second locking hole. Each connecting plate is connected to multiple locking pins in each group. The side wall of the plug-in cylinder is provided with a pair of sliding rods and a fixing plate. The fixing plate is connected to the pair of sliding rods, and the plug-in cylinder has a threaded hole on the fixing plate. After the workpiece is clamped, the first locking hole and the second locking hole are aligned. The worker rotates the rotating pin, which in turn drives the connecting plate and the locking pin to slide along the axial direction of the sliding rods until the locking pin is plugged into the first locking hole and the second locking hole. In this way, the relative position of the positioning rod and the plug-in cylinder is fixed, further ensuring that the workpiece is stably placed in the placement slot.

[0018] To more clearly illustrate the structural features and effects of this utility model, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0019] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0020] Figure 2 This is a structural diagram of the positioning structure of this utility model;

[0021] Figure 3 For the present utility model Figure 2 A magnified view of part A in the middle.

[0022] In the diagram: 1. Main body of the equipment; 11. Mounting frame; 12. Placement block; 121. Placement groove; 122. Slide groove; 13. Cylinder; 14. Pressure plate; 141. Sliding rod; 142. Fixed column; 143. Moving groove; 2. Positioning structure; 21. Positioning rod; 211. First locking hole; 22. With moving block; 23. Connecting rod; 24. Sliding ring; 25. Electric telescopic column; 26. Insertion tube; 261. Slider; 262. Second locking hole; 263. Sliding rod; 264. Fixed plate; 265. Threaded hole; 27. Locking column; 28. Rotating column; 29. ​​Connecting plate; 291. Sliding hole. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0024] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0025] like Figures 1 to 3 As shown, this embodiment of the present invention provides a four-axis assembly mechanism with a positioning structure, comprising:

[0026] Specifically, the positioning structure 2 also includes at least the equipment body 1. The equipment body 1 includes a mounting frame 11, a placement block 12, a cylinder 13, and a pressure plate 14 that are detachably mounted on the machine tool. The placement block 12 is fixedly mounted on the upper end face of the mounting frame 11. The pressure plate 14 is mounted at a predetermined distance above the placement block 12. A sliding rod 141 is provided on the lower end face of the pressure plate 14. The sliding rod 141 is inserted into the pressure plate 14 and the mounting frame 11. The cylinder 13 is mounted between the upper end face and the lower end face of the mounting frame 11. The output shaft of the cylinder 13 is connected to the sliding rod 141. The upper end face of the placement block 12 has a placement groove 121. A fixing column 142 is provided on the upper end face of the pressure plate 14. The pressure plate 14 is also provided with a pair of moving grooves 143 symmetrically distributed around the axis of the fixing column 142.

[0027] Positioning structure 2 includes a pair of positioning rods 21, a pair of moving blocks 22, a pair of connecting rods 23 and a sliding ring 24. The two ends of each connecting rod 23 are rotatably connected to the side wall of the sliding ring 24 and the upper end face of the moving block 22, respectively. The positioning rods 21 are fixedly installed on the lower end face of the moving block 22. The pair of positioning rods 21 are arranged on both sides of the placement groove 121. Each moving block 22 is slidably arranged in each moving groove 143. The sliding ring 24 is slidably sleeved on the fixed post 142.

[0028] In this embodiment, during use, the worker places the workpiece to be assembled in the placement groove 121; the cylinder 13, after being started, drives the sliding rod 141 to slide, so that the pressure plate 14 slides down towards the placement groove 121 until the lower end face of the pressure plate 14 is in contact with the upper end face of the workpiece; the sliding ring 24 moves along the axial direction of the fixed column 142, at which time the angle between the axial direction of the connecting rod 23 and the axial direction of the fixed column 142 changes, thereby driving a pair of moving blocks 22 rotatably connected to the connecting rod 23 to move along the moving groove 143 and towards each other, until a pair of positioning rods 21 move in the same direction to clamp the opposite sides of the workpiece; in this way, the upper and lower end faces and the opposite sides of the workpiece are fixed to prevent the workpiece from sliding or tilting due to uneven force in the placement groove 121, ensuring that the assembly process proceeds smoothly.

[0029] A pair of electric telescopic columns 25 are arranged opposite each other with the axis of the fixed column 142 as the center. The two ends of the electric telescopic columns 25 are connected to the lower end face of the sliding ring 24 and the upper end face of the pressure plate 14.

[0030] In this embodiment, the activated electric telescopic column 25 drives the sliding ring 24 to move axially along the fixed column 142;

[0031] Specifically, the positioning structure 2 also includes a pair of plug-in cylinders 26, each positioning rod 21 being slidably plugged into the plug-in cylinder 26, and the bottom wall of the plug-in cylinder 26 being in contact with the upper end face of the placement block 12;

[0032] Specifically, a pair of sliding grooves 122 are provided on the upper end face of the placement block 12, and a slider 261 is provided on the lower end face of each insertion cylinder 26. The slider 261 is slidably disposed in the sliding groove 122, and the axial direction of the sliding groove 122 is parallel to the axial direction of the moving groove 143.

[0033] In this embodiment, as the pressure plate 14 moves toward the placement groove 121, the positioning rod 21 slides up and down in the insertion tube 26, while the slider 261 at the lower end of the insertion tube 26 slides in the groove 122. By setting the insertion tube 26, the positioning rod 21 can clamp and position workpieces of different heights. By setting the slider 261, the clamping process of the positioning rod 21 is made more stable.

[0034] Specifically, the positioning rod 21 is provided with a plurality of first locking holes 211 at intervals, and the insertion tube 26 is provided with a plurality of second locking holes 262 at intervals. The plurality of first locking holes 211 and the plurality of second locking holes 262 are spaced at the same intervals and have the same diameter. The positioning structure 2 also includes two sets of locking pins 27, which are inserted into the first locking holes 211 and the second locking holes 262.

[0035] Specifically, the positioning structure 2 includes a pair of rotating columns 28 and a pair of connecting plates 29. Each group of locking columns 27 is provided with multiple locking columns 27. Each connecting plate 29 is connected to the multiple locking columns 27 in each group. The side wall of the plug-in cylinder 26 is provided with a pair of sliding rods 263 and a fixing plate 264. The fixing plate 264 is connected to the pair of sliding rods 263. The connecting plate 29 is provided with a pair of sliding holes 291. The plug-in cylinder 26 is provided with a threaded hole 265 on the fixing plate 264. The end of the rotating column 28 is rotatably connected to the connecting plate 29. The rotating column 28 is threadedly connected to the threaded hole 265. The sliding rod 263 is inserted into the sliding hole 291.

[0036] In this embodiment, after the workpiece is clamped, the first locking hole 211 and the second locking hole 262 are aligned. The worker rotates the rotating column 28, which in turn drives the connecting plate 29 and the locking column 27 to slide along the slide bar 263 axially until the locking column 27 is inserted into the first locking hole 211 and the second locking hole 262. In this way, the relative position of the positioning rod 21 and the insertion cylinder 26 is fixed, further ensuring that the workpiece is stably placed in the placement groove 121.

[0037] The working principle of this utility model is as follows:

[0038] When in use, the worker places the workpiece to be assembled in the placement groove 121; after the cylinder 13 is started, it drives the sliding rod 141 to slide, so that the pressure plate 14 slides down toward the placement groove 121 until the lower end face of the pressure plate 14 is in contact with the upper end face of the workpiece.

[0039] Subsequently, the activated electric telescopic column 25 drives the sliding ring 24 to move along the axial direction of the fixed column 142. At this time, the angle between the axial direction of the connecting rod 23 and the axial direction of the fixed column 142 changes, thereby driving a pair of moving blocks 22 rotatably connected to the connecting rod 23 to move along the moving groove 143 and move towards each other until a pair of positioning rods 21 move in the same direction to clamp the opposite sides of the workpiece. In this way, the upper and lower end faces and opposite sides of the workpiece are fixed to prevent the workpiece from sliding or tilting due to uneven force in the placement groove 121, ensuring that the assembly process proceeds smoothly.

[0040] Furthermore, as the pressure plate 14 moves toward the placement groove 121, the positioning rod 21 slides up and down in the insertion tube 26, while the slider 261 at the lower end of the insertion tube 26 slides in the groove 122; by setting the insertion tube 26, the positioning rod 21 can clamp and position workpieces of different heights; by setting the slider 261, the clamping process of the positioning rod 21 is made more stable.

[0041] After the workpiece is clamped, the first locking hole 211 and the second locking hole 262 are aligned. The worker rotates the rotating column 28, which in turn drives the connecting plate 29 and the locking column 27 to slide along the slide bar 263 axially until the locking column 27 is inserted into the first locking hole 211 and the second locking hole 262. In this way, the relative position of the positioning rod 21 and the insertion cylinder 26 is fixed, further ensuring that the workpiece is stably placed in the placement groove 121.

[0042] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A four-axis assembly mechanism with a positioning structure, characterized in that, include: The main body of the equipment (1) includes a mounting frame (11), a placement block (12), a cylinder (13), and a pressure plate (14) that are detachably mounted on the machine tool. The placement block (12) is fixedly mounted on the upper end face of the mounting frame (11). The pressure plate (14) is mounted at a predetermined distance above the placement block (12). A sliding rod (141) is provided on the lower end face of the pressure plate (14). The sliding rod (141) is inserted into the pressure plate (14) and the mounting frame (11). The cylinder (13) is mounted between the upper end face and the lower end face of the mounting frame (11). The output shaft of the cylinder (13) is connected to the sliding rod (141). The upper end face of the placement block (12) has a placement groove (121). The upper end face of the pressure plate (14) is provided with a fixing column (142). The pressure plate (14) is also provided with a pair of moving grooves (143) symmetrically distributed around the axial direction of the fixing column (142). The positioning structure (2) includes a pair of positioning rods (21), a pair of moving blocks (22), a pair of connecting rods (23) and a sliding ring (24). The two ends of each connecting rod (23) are rotatably connected to the side wall of the sliding ring (24) and the upper end face of the moving block (22), respectively. The positioning rods (21) are fixedly installed on the lower end face of the moving block (22). The pair of positioning rods (21) are arranged on both sides of the placement groove (121). Each moving block (22) is slidably arranged in each moving groove (143). The sliding ring (24) is slidably sleeved on the fixed column (142).

2. The four-axis assembly mechanism with a positioning structure according to claim 1, characterized in that: The positioning structure (2) further includes at least one pair of electric telescopic columns (25), which are arranged opposite each other with the axis of the fixed column (142) as the center. The two ends of the electric telescopic columns (25) are connected to the lower end face of the sliding ring (24) and the upper end face of the pressure plate (14).

3. A four-axis assembly mechanism with a positioning structure according to claim 2, characterized in that: The positioning structure (2) further includes a pair of plug tubes (26), each of the positioning rods (21) being slidably plugged into the plug tube (26), and the bottom wall of the plug tube (26) being in contact with the upper surface of the placement block (12).

4. A four-axis assembly mechanism with a positioning structure according to claim 3, characterized in that: The upper surface of the placement block (12) is provided with a pair of sliding grooves (122), and the lower surface of each plug tube (26) is provided with a slider (261). The slider (261) is slidably disposed in the sliding groove (122), and the axial direction of the sliding groove (122) is parallel to the axial direction of the moving groove (143).

5. A four-axis assembly mechanism with a positioning structure according to claim 4, characterized in that: The positioning rod (21) is provided with a plurality of first locking holes (211) at intervals, and the plug-in tube (26) is provided with a plurality of second locking holes (262) at intervals. The plurality of first locking holes (211) and the plurality of second locking holes (262) are spaced at the same intervals and have the same diameter. The positioning structure (2) also includes two sets of locking pins (27), which are inserted into the first locking holes (211) and the second locking holes (262).

6. A four-axis assembly mechanism with a positioning structure according to claim 5, characterized in that: The positioning structure (2) includes a pair of rotating columns (28) and a pair of connecting plates (29). Each group of locking columns (27) is provided with multiple locking columns (27). Each connecting plate (29) is connected to multiple locking columns (27) in each group. The side wall of the plug-in cylinder (26) is provided with a pair of sliding rods (263) and a fixing plate (264). The fixing plate (264) is connected to a pair of sliding rods (263). The connecting plate (29) is provided with a pair of sliding holes (291). The plug-in cylinder (26) is provided with a threaded hole (265) on the fixing plate (264). The end of the rotating column (28) is rotatably connected to the connecting plate (29). The rotating column (28) is threadedly connected to the threaded hole (265). The sliding rod (263) is inserted into the sliding hole (291).

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